Patent Publication Number: US-2022239450-A1

Title: Techniques for enhancing user equipment performance for multiple subscriber identification module operation

Description:
CROSS REFERENCE 
     The present Application for Patent claims the benefit of U.S. Provisional Patent Application No. 63/141,435 by JAIN et al., entitled “TECHNIQUES FOR ENHANCING USER EQUIPMENT PERFORMANCE FOR MULTIPLE SUBSCRIBER IDENTIFICATION MODULE OPERATION,” filed Jan. 25, 2021, assigned to the assignee hereof, and expressly incorporated by reference herein. 
    
    
     FIELD OF DISCLOSURE 
     The field of disclosure, for example, relates to wireless communication at a user equipment (UE), including techniques for enhancing UE performance for multiple subscriber identification module operations. 
     BACKGROUND 
     Wireless communications systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, and so on. These systems may be capable of supporting communication with multiple users by sharing the available system resources (e.g., time, frequency, and power). Examples of such multiple-access systems include fourth generation (4G) systems such as Long Term Evolution (LTE) systems, LTE-Advanced (LTE-A) systems, or LTE-A Pro systems, and fifth generation (5G) systems which may be referred to as New Radio (NR) systems. These systems may employ technologies such as code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal frequency division multiple access (OFDMA), or discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-S-OFDM). A wireless multiple-access communications system may include one or more base stations or one or more network access nodes, each simultaneously supporting communication for multiple communication devices, which may be otherwise known as user equipment (UE). 
     A UE may support multiple subscriptions to connect with multiple networks simultaneously. Additionally, a UE may support a non-standalone architecture to connect with multiple networks. In some cases, communications in a non-standalone architecture may be unstable and may adversely impact the performance of the UE. 
     SUMMARY 
     The described techniques relate to improved methods, systems, devices, and apparatuses that support techniques for enhancing user equipment performance for multiple subscriber identification module operation. In some examples, the described techniques provide for a user equipment (UE) to use enhanced techniques for communication. A UE may be configured with multiple subscriber identification modules. Each subscriber identification module may be associated with a subscription that allows the UE to connect to and communicate with a network. In some cases, each subscriber identification module may connect to a different network, be associated with a different radio access technology, or any combination thereof. In some examples, the UE may connect to a first cell in a non-standalone mode of operation. In addition, a first band on the first subscription and a second band on the second subscription may have the same downlink path resulting in a full tune-away at the UE, for example, where the UE may tune away from the first subscription to another subscription (e.g., for idle mode operations), where the first subscription may lose access to radio frequency resources for the duration of the tune away. 
     According to some aspects, the UE may identify a first set of bands associated with a first subscription and a second set of bands associated with a second subscription. In some examples, the second subscription may be different from the first subscription. The UE may determine that at least one band from the first set of bands and at least one band from the second set of bands share a set of radio frequency (RF) front-end resources. For example, the UE may determine that some combination of bands associated with each subscription may cause the UE to perform a full tune-away operation from one subscription when communicating using the combination of bands. The UE may then refrain from communicating on one band from the first set of bands. As an example, the UE may refrain from communicating on a band from the first set of bands based on determining that a first band from the first set of bands and a second band from the second set of bands share the set of RF front-end resources, where the band may be associated with a secondary component carrier. By refraining from communicating on the band associated with the secondary component carrier, the first band and the second band may be fully concurrent, thereby avoiding tune away. 
     A method for wireless communication at a UE is described. The method may include identifying a first set of bands associated with a first subscription, identifying a second set of bands associated with a second subscription different from the first subscription, determining that a first band from the first set of bands and a second band from the second set of bands share a set of radio frequency front-end resources, refraining from communicating on a third band from the first set of bands, the third band being associated with a secondary component carrier of a multi-carrier communications scheme, where refraining from communicating on the third band is based on determining that the first band and the second band share the set of radio frequency front-end resources and the third band being associated with the secondary component carrier, and communicating on a remaining set of bands from the first set of bands and the second set of bands based on refraining from communicating on the third band. 
     An apparatus for wireless communication at a UE is described. The apparatus may include a processor, memory coupled with the processor, and instructions stored in the memory. The instructions may be executable by the processor to cause the apparatus to identify a first set of bands associated with a first subscription, identify a second set of bands associated with a second subscription different from the first subscription, determine that a first band from the first set of bands and a second band from the second set of bands share a set of radio frequency front-end resources, refrain from communicating on a third band from the first set of bands, the third band being associated with a secondary component carrier of a multi-carrier communications scheme, where refraining from communicating on the third band is based on determining that the first band and the second band share the set of radio frequency front-end resources and the third band being associated with the secondary component carrier, and communicate on a remaining set of bands from the first set of bands and the second set of bands based on refraining from communicating on the third band. 
     Another apparatus for wireless communication at a UE is described. The apparatus may include means for identifying a first set of bands associated with a first subscription, means for identifying a second set of bands associated with a second subscription different from the first subscription, means for determining that a first band from the first set of bands and a second band from the second set of bands share a set of radio frequency front-end resources, means for refraining from communicating on a third band from the first set of bands, the third band being associated with a secondary component carrier of a multi-carrier communications scheme, where refraining from communicating on the third band is based on determining that the first band and the second band share the set of radio frequency front-end resources and the third band being associated with the secondary component carrier, and means for communicating on a remaining set of bands from the first set of bands and the second set of bands based on refraining from communicating on the third band. 
     A non-transitory computer-readable medium storing code for wireless communication at a UE is described. The code may include instructions executable by a processor to identify a first set of bands associated with a first subscription, identify a second set of bands associated with a second subscription different from the first subscription, determine that a first band from the first set of bands and a second band from the second set of bands share a set of radio frequency front-end resources, refrain from communicating on a third band from the first set of bands, the third band being associated with a secondary component carrier of a multi-carrier communications scheme, where refraining from communicating on the third band is based on determining that the first band and the second band share the set of radio frequency front-end resources and the third band being associated with the secondary component carrier, and communicate on a remaining set of bands from the first set of bands and the second set of bands based on refraining from communicating on the third band. 
     Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for determining that the third band may be configured as the secondary component carrier and determining an absence of control signaling activating the third band associated with the secondary component carrier, where refraining from communicating on the third band includes dropping the third band based on the absence of the control signaling activating the third band associated with the secondary component carrier. 
     Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving, from a base station, control signaling activating the third band associated with the secondary component carrier and determining that the third band associated with the secondary component carrier and may be activated based on receiving the control signaling. 
     In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, refraining from communicating on the third band may include operations, features, means, or instructions for dropping the third band associated with the secondary component carrier based on determining that the first band from the first set of bands and the second band from the second set of bands shares the set of radio frequency front-end resources and the third band being activated. 
     In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, refraining from communicating on the third band may include operations, features, means, or instructions for reporting a compensated measurement on the third band associated with the secondary component carrier based on determining that the first band from the first set of bands and the second band from the second set of bands share the set of radio frequency front-end resources and the third band being activated, where the third band may be dropped based on the reported compensated measurement. 
     Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for identifying a number of resource grants associated with the secondary component carrier based on the third band being activated, where the third band may be dropped based on the identified number of resource grants associated with the secondary component carrier. 
     Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for deprioritizing the third band from the first set of bands based on determining that the first band from the first set of bands and the second band from the second set of bands shares the set of radio frequency front-end resources. 
     In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, deprioritizing the third band may include operations, features, means, or instructions for reporting a compensated measurement on the third band from the first set of bands based on determining that the first band from the first set of bands and the second band from the second set of bands share the set of radio frequency front-end resources. 
     In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, deprioritizing the third band may include operations, features, means, or instructions for refraining from reporting a measurement on the third band from the first set of bands based on determining that the first band from the first set of bands and the second band from the second set of bands share the set of radio frequency front-end resources. 
     In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, communicating on the remaining set of bands from the first set of bands may include operations, features, means, or instructions for simultaneously communicating on the remaining set of bands for the first subscription and the second set of bands for the second subscription based on refraining from communicating on the third band associated with the secondary component carrier. 
     In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, determining that the first band from the first set of bands and the second band from the second set of bands share the set of radio frequency front-end resources may include operations, features, means, or instructions for determining that a combination of at least the first band, the second band, and the third band may be associated with a full tune-away operation from the first subscription. In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the UE may be configured to operate in a non-standalone mode of operation using the first set of bands. 
     In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the first subscription may be associated with a multi-carrier operation and the second subscription may be associated with a single-carrier operation. In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, a communication state for the first set of bands includes a dual-connectivity mode and a communication state for the second set of bands includes an idle mode. 
     A method for wireless communication at a UE is described. The method may include identifying a first set of bands associated with a first subscription, identifying a second set of bands associated with a second subscription different from the first subscription, determining that a first band from the first set of bands and a second band from the second set of bands share a set of radio frequency front-end resources, and transmitting, to a base station, a capability report excluding the first band and a third band from the first set of bands based on determining that the first band and the second band shares the set of radio frequency front-end resources, the third band being associated with a secondary component carrier of a multi-carrier communications scheme. 
     An apparatus for wireless communication at a UE is described. The apparatus may include a processor, memory coupled with the processor, and instructions stored in the memory. The instructions may be executable by the processor to cause the apparatus to identify a first set of bands associated with a first subscription, identify a second set of bands associated with a second subscription different from the first subscription, determine that a first band from the first set of bands and a second band from the second set of bands share a set of radio frequency front-end resources, and transmit, to a base station, a capability report excluding the first band and a third band from the first set of bands based on determining that the first band and the second band shares the set of radio frequency front-end resources, the third band being associated with a secondary component carrier of a multi-carrier communications scheme. 
     Another apparatus for wireless communication at a UE is described. The apparatus may include means for identifying a first set of bands associated with a first subscription, means for identifying a second set of bands associated with a second subscription different from the first subscription, means for determining that a first band from the first set of bands and a second band from the second set of bands share a set of radio frequency front-end resources, and means for transmitting, to a base station, a capability report excluding the first band and a third band from the first set of bands based on determining that the first band and the second band shares the set of radio frequency front-end resources, the third band being associated with a secondary component carrier of a multi-carrier communications scheme. 
     A non-transitory computer-readable medium storing code for wireless communication at a UE is described. The code may include instructions executable by a processor to identify a first set of bands associated with a first subscription, identify a second set of bands associated with a second subscription different from the first subscription, determine that a first band from the first set of bands and a second band from the second set of bands share a set of radio frequency front-end resources, and transmit, to a base station, a capability report excluding the first band and a third band from the first set of bands based on determining that the first band and the second band shares the set of radio frequency front-end resources, the third band being associated with a secondary component carrier of a multi-carrier communications scheme. 
     Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for identifying a set of multiple combinations of bands from the first set of bands and the second set of bands for communicating with the base station, where a combination of the first band and the second band may be included in the set of multiple combinations. In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, transmitting the capability report may include operations, features, means, or instructions for transmitting the capability report including a remaining number of combinations of the set of multiple combinations of bands from the first set of bands and the second set of bands. 
     Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for refraining from communicating on the third band based on transmitting the capability report excluding the first band and the third band. In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the UE may be configured to operate in a non-standalone mode of operation. 
     In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the first subscription may be associated with a multi-carrier operation and the second subscription may be associated with a single-carrier operation. In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, a communication state for the first set of bands includes a dual-connectivity mode a communication state for the second set of bands includes an idle mode. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  illustrates an example of a wireless communications system that supports techniques for enhancing user equipment performance for multiple subscriber identification module operation in accordance with aspects of the present disclosure. 
         FIG. 2  illustrates an example of a wireless communications system that supports techniques for enhancing user equipment performance for multiple subscriber identification module operation in accordance with aspects of the present disclosure. 
         FIG. 3  illustrates an example of a hardware configuration that supports techniques for enhancing user equipment performance for multiple subscriber identification module operation in accordance with aspects of the present disclosure. 
         FIG. 4  illustrates an example of a process flow in a system that supports techniques for enhancing user equipment performance for multiple subscriber identification module operation in accordance with aspects of the present disclosure. 
         FIGS. 5 and 6  show block diagrams of devices that support techniques for enhancing user equipment performance for multiple subscriber identification module operation in accordance with aspects of the present disclosure. 
         FIG. 7  shows a block diagram of a communications manager that supports techniques for enhancing user equipment performance for multiple subscriber identification module operation in accordance with aspects of the present disclosure. 
         FIG. 8  shows a diagram of a system including a device that supports techniques for enhancing user equipment performance for multiple subscriber identification module operation in accordance with aspects of the present disclosure. 
         FIGS. 9 through 13  show flowcharts illustrating methods that support techniques for enhancing user equipment performance for multiple subscriber identification module operation in accordance with aspects of the present disclosure. 
     
    
    
     DETAILED DESCRIPTION 
     A user equipment (UE) may support communications with a network using a dual (e.g., non-standalone) architecture, where different radio access technologies may be used concurrently or simultaneously. For example, a non-standalone UE may anchor on or connect to a cell associated with a first radio access technology (e.g., Long-Term Evolution (LTE)), while facilitating communications with a cell associated with a second radio access technology (e.g., New Radio (NR)). In some cases, the cells associated with each radio access technology may be related to (e.g., provided by, associated with) a single base station or may be related to separate base stations. 
     As described herein, some wireless networks may be configured to operate in a dual-connectivity configuration. For example, a wireless network may be configured to operate in an evolved universal terrestrial radio access network (E-UTRAN) in NR, which may be referred to as EN-DC, as 5G EN-DC, or as a 5G NR dual-connectivity configuration or system, or some combination thereof. Broadly, the dual-connectivity configuration may support the UE being connected to two cells or two devices, such as base stations, (or nodes) at the same time. In some examples, one node (e.g., a master node) may be a 5G (e.g., an NR) node and a second node (e.g., a secondary node) may be an LTE node. In other examples, the master node may be an LTE node and the secondary node may be a 5G (e.g., NR) node. In some examples, the master node and the secondary node may be 5G (e.g., NR) nodes or they may both be LTE nodes. The dual-connectivity configuration may be supported when inter-connectivity has been established between the master node and secondary node, via one or more backhaul links, core network functions, or the like. Some examples of dual-connectivity may include the UE being concurrently or simultaneously connected to the LTE and 5G NR node or the UE utilizing the LTE node for control plane information and the 5G NR node for user plane traffic, or any combination thereof. In some aspects, the dual-connectivity configuration may support direct or split signaling radio bearers (or both). 
     In some wireless communications systems, a UE may be configured with multiple subscriber identification modules. That is, the UE may support a first subscriber identification module (SIM) corresponding to a first subscription, and the UE may further support a second SIM corresponding to a second, different subscription. Such techniques may be referred to as multiple subscriber identification module (MSIM), milti-SIM, or other like terminology. Each subscriber identification module may be associated with a subscription that allows the UE to connect to and communicate with a network. In some cases, each subscriber identification module may connect to a different network. For example, the UE may have a first subscriber identification module with a first subscription providing access to a first network (e.g., 5G network), and a second subscriber identification module with a second subscription providing access to a second network (e.g., 4G network). Alternatively, the first subscriber identification module with the first subscription and the second subscriber identification module with the second subscription may provide access to the same network. In some examples, the first subscriber identification module with the first subscription and the second subscriber identification module with the second subscription may be configured to support NR technology and may be configured to concurrently or simultaneously operate in a non-standalone mode of operation. 
     According to one or more aspects of the present disclosure, the UE may establish a connection with a cell of a radio access technology using a first subscription and a second subscription. While operating in a non-standalone mode of operation, the UE may be configured with a first set of bands for a first subscription and a second set of bands for a second subscription. In some instances, a UE hardware may be designed such that a first band on the first subscription and a second band on the second subscription has the same downlink path. That is, a first band on the first subscription and a second band on the second subscription may be configured to share a common set of radio frequency (RF) front-end resources. For example, the UE may be configured with set of RF spectrum bands (e.g., a B66 band, a B2 band, and an n71 band) on the first subscription and another set of RF spectrum bands (e.g., a wideband code division multiple access (WCDMA) B2 band) on the second subscription. In this example, the n71 band and the WCDMA B2 band may be configured to use the common set of resources (e.g., RF front-end resources of the UE) resulting in a full tune-away of the n71 band, for example, during a paging operation on the WCDMA B2 band (e.g., while in idle mode). Because the n71 band may provide high throughput (e.g., in accordance with NR technology) and may be used for communications with a network, this full tune-away hampers the overall throughput supported by the UE and, in turn, hampers the UE performance and degrades the user experience. 
     To decrease latency and improve resource efficiency, a UE may determine that a combination of bands are not fully concurrent and that the UE may be configured to perform a full tune-away operation when communicating using the combination of bands. In such cases, the UE may then refrain from communicating on (e.g., dropping, deprioritizing) some bands to enable communications on the determined combination of bands without full tune away. In some examples, if a band associated with a secondary component carrier is configured at the first subscription, the UE can drop the band associated with the secondary component carrier. In another example, the UE may deprioritize some combination of bands which causes the UE to switch to a full tune-away mode when such bands are activated. In some aspects, the UE determines that a combination of bands causes the UE to switch to a full tune away mode. In such an example, the UE may refrain from including an indication of such a combination of bands in a capability report to a base station. 
     UEs capable of supporting full-concurrency between multiple subscriptions may utilize the techniques described herein to experience power saving, such as reduced power consumption and extended battery life while ensuring reliable and efficient communications between UEs and base stations, among other benefits. Aspects of the subject matter described in this disclosure may be implemented to realize one or more of the following potential advantages. The techniques employed by the described UEs may provide benefits and enhancements to the operation of the UEs. For example, operations performed by the UEs may provide improvements to wireless operations. Additionally or alternatively, the techniques employed by the described UEs may provide time and power savings for multiple subscriptions. In some examples, the UEs may support high reliability and low latency communications, among other examples, in accordance with aspects of the present disclosure. The described techniques may thus include features for improvements to power consumption, spectral efficiency, higher data rates and, in some examples, may promote enhanced efficiency for high reliability and low latency operations, among other benefits. 
     Aspects of the disclosure are initially described in the context of wireless communications systems. Aspects of the disclosure are further described in the context of a hardware configuration and a process flow. Aspects of the disclosure are further illustrated by and described with reference to apparatus diagrams, system diagrams, and flowcharts that relate to techniques for enhancing user equipment performance for multiple subscriber identification module operation. 
       FIG. 1  illustrates an example of a wireless communications system  100  that supports techniques for enhancing user equipment performance for multiple subscriber identification module operation in accordance with aspects of the present disclosure. The wireless communications system  100  may include one or more base stations  105 , one or more UEs  115 , and a core network  130 . In some examples, the wireless communications system  100  may be an LTE network, an LTE-Advanced (LTE-A) network, an LTE-A Pro network, or an NR network. In some examples, the wireless communications system  100  may support enhanced broadband communications, ultra-reliable (e.g., mission critical) communications, low latency communications, communications with low-cost and low-complexity devices, or any combination thereof. 
     The base stations  105  may be dispersed throughout a geographic area to form the wireless communications system  100  and may be devices in different forms or having different capabilities. The base stations  105  and the UEs  115  may wirelessly communicate via one or more communication links  125 . Each base station  105  may provide a coverage area  110  over which the UEs  115  and the base station  105  may establish one or more communication links  125 . The coverage area  110  may be an example of a geographic area over which a base station  105  and a UE  115  may support the communication of signals according to one or more radio access technologies. 
     The UEs  115  may be dispersed throughout a coverage area  110  of the wireless communications system  100 , and each UE  115  may be stationary, or mobile, or both at different times. The UEs  115  may be devices in different forms or having different capabilities. Some example UEs  115  are illustrated in  FIG. 1 . The UEs  115  described herein may be able to communicate with various types of devices, such as other UEs  115 , the base stations  105 , or network equipment (e.g., core network nodes, relay devices, integrated access and backhaul (IAB) nodes, or other network equipment), as shown in  FIG. 1 . 
     The base stations  105  may communicate with the core network  130 , or with one another, or both. For example, the base stations  105  may interface with the core network  130  through one or more backhaul links  120  (e.g., via an S1, N2, N3, or other interface). The base stations  105  may communicate with one another over the backhaul links  120  (e.g., via an X2, Xn, or other interface) either directly (e.g., directly between base stations  105 ), or indirectly (e.g., via core network  130 ), or both. In some examples, the backhaul links  120  may be or include one or more wireless links. 
     One or more of the base stations  105  described herein may include or may be referred to by a person having ordinary skill in the art as a base transceiver station, a radio base station, an access point, a radio transceiver, a NodeB, an eNodeB (eNB), a next-generation NodeB or a giga-NodeB (either of which may be referred to as a gNB), a Home NodeB, a Home eNodeB, or other suitable terminology. 
     A UE  115  may include or may be referred to as a mobile device, a wireless device, a remote device, a handheld device, or a subscriber device, or some other suitable terminology, where the “device” may also be referred to as a unit, a station, a terminal, or a client, among other examples. A UE  115  may also include or may be referred to as a personal electronic device such as a cellular phone, a personal digital assistant (PDA), a tablet computer, a laptop computer, or a personal computer. In some examples, a UE  115  may include or be referred to as a wireless local loop (WLL) station, an Internet of Things (IoT) device, an Internet of Everything (IoE) device, or a machine type communications (MTC) device, among other examples, which may be implemented in various objects such as appliances, or vehicles, meters, among other examples. 
     The UEs  115  described herein may be able to communicate with various types of devices, such as other UEs  115  that may sometimes act as relays as well as the base stations  105  and the network equipment including macro eNBs or gNBs, small cell eNBs or gNBs, or relay base stations, among other examples, as shown in  FIG. 1 . 
     The UEs  115  and the base stations  105  may wirelessly communicate with one another via one or more communication links  125  over one or more carriers. The term “carrier” may refer to a set of radio frequency spectrum resources having a defined physical layer structure for supporting the communication links  125 . For example, a carrier used for a communication link  125  may include a portion of a radio frequency spectrum band (e.g., a bandwidth part (BWP)) that is operated according to one or more physical layer channels for a given radio access technology (e.g., LTE, LTE-A, LTE-A Pro, NR). Each physical layer channel may carry acquisition signaling (e.g., synchronization signals, system information), control signaling that coordinates operation for the carrier, user data, or other signaling. The wireless communications system  100  may support communication with a UE  115  using carrier aggregation or multi-carrier operation. A UE  115  may be configured with multiple downlink component carriers and one or more uplink component carriers according to a carrier aggregation configuration. Carrier aggregation may be used with both frequency division duplexing (FDD) and time division duplexing (TDD) component carriers. 
     In some examples (e.g., in a carrier aggregation configuration), a carrier may also have acquisition signaling or control signaling that coordinates operations for other carriers. A carrier may be associated with a frequency channel (e.g., an evolved universal mobile telecommunication system terrestrial radio access (E-UTRA) absolute radio frequency channel number (EARFCN)) and may be positioned according to a channel raster for discovery by the UEs  115 . A carrier may be operated in a standalone mode where initial acquisition and connection may be conducted by the UEs  115  via the carrier, or the carrier may be operated in a non-standalone mode where a connection is anchored using a different carrier (e.g., of the same or a different radio access technology). 
     The communication links  125  shown in the wireless communications system  100  may include uplink transmissions from a UE  115  to a base station  105 , or downlink transmissions from a base station  105  to a UE  115 . Carriers may carry downlink or uplink communications (e.g., in an FDD mode) or may be configured to carry downlink and uplink communications (e.g., in a TDD mode). 
     A carrier may be associated with some bandwidth of the radio frequency spectrum, and in some examples the carrier bandwidth may be referred to as a “system bandwidth” of the carrier or the wireless communications system  100 . For example, the carrier bandwidth may be one of a number of determined bandwidths for carriers of a radio access technology (e.g., 1.4, 3, 5, 10, 15, 20, 40, or 80 megahertz (MHz)). Devices of the wireless communications system  100  (e.g., the base stations  105 , the UEs  115 , or both) may have hardware configurations that support communications over a carrier bandwidth or may be configurable to support communications over one of a set of carrier bandwidths. In some examples, the wireless communications system  100  may include base stations  105  or UEs  115  that support simultaneous communications via carriers associated with multiple carrier bandwidths. In some examples, each served UE  115  may be configured for operating over portions (e.g., a sub-band, a BWP) or all of a carrier bandwidth. 
     Signal waveforms transmitted over a carrier may be made up of multiple subcarriers (e.g., using multi-carrier modulation (MCM) techniques such as orthogonal frequency division multiplexing (OFDM) or discrete Fourier transform spread OFDM (DFT-S-OFDM)). In a system employing MCM techniques, a resource element may include one symbol period (e.g., a duration of one modulation symbol) and one subcarrier, where the symbol period and subcarrier spacing are inversely related. The number of bits carried by each resource element may depend on the modulation scheme (e.g., the order of the modulation scheme, the coding rate of the modulation scheme, or both). Thus, the more resource elements that a UE  115  receives and the higher the order of the modulation scheme, the higher the data rate may be for the UE  115 . A wireless communications resource may refer to a combination of a radio frequency spectrum resource, a time resource, and a spatial resource (e.g., spatial layers or beams), and the use of multiple spatial layers may further increase the data rate or data integrity for communications with a UE  115 . 
     One or more numerologies for a carrier may be supported, where a numerology may include a subcarrier spacing (Δf) and a cyclic prefix. A carrier may be divided into one or more BWPs having the same or different numerologies. In some examples, a UE  115  may be configured with multiple BWPs. In some examples, a single BWP for a carrier may be active at a given time and communications for the UE  115  may be restricted to one or more active BWPs. 
     The time intervals for the base stations  105  or the UEs  115  may be expressed in multiples of a basic time unit which may, for example, refer to a sampling period of T s =1/(Δf max ·N f ) seconds, where Δf max  may represent the maximum supported subcarrier spacing, and N f  may represent the maximum supported discrete Fourier transform (DFT) size. Time intervals of a communications resource may be organized according to radio frames each having a specified duration (e.g., 10 milliseconds (ms)). Each radio frame may be identified by a system frame number (SFN) (e.g., ranging from 0 to 1023). 
     Each frame may include multiple consecutively numbered subframes or slots, and each subframe or slot may have the same duration. In some examples, a frame may be divided (e.g., in the time domain) into subframes, and each subframe may be further divided into a number of slots. Alternatively, each frame may include a variable number of slots, and the number of slots may depend on subcarrier spacing. Each slot may include a number of symbol periods (e.g., depending on the length of the cyclic prefix prepended to each symbol period). In some wireless communications systems  100 , a slot may further be divided into multiple mini-slots containing one or more symbols. Excluding the cyclic prefix, each symbol period may contain one or more (e.g., N f ) sampling periods. The duration of a symbol period may depend on the subcarrier spacing or frequency band of operation. 
     A subframe, a slot, a mini-slot, or a symbol may be the smallest scheduling unit (e.g., in the time domain) of the wireless communications system  100  and may be referred to as a transmission time interval (TTI). In some examples, the TTI duration (e.g., the number of symbol periods in a TTI) may be variable. Additionally or alternatively, the smallest scheduling unit of the wireless communications system  100  may be dynamically selected (e.g., in bursts of shortened TTIs (sTTIs)). 
     Physical channels may be multiplexed on a carrier according to various techniques. A physical control channel and a physical data channel may be multiplexed on a downlink carrier, for example, using one or more of time division multiplexing (TDM) techniques, frequency division multiplexing (FDM) techniques, or hybrid TDM-FDM techniques. A control region (e.g., a control resource set (CORESET)) for a physical control channel may be defined by a number of symbol periods and may extend across the system bandwidth or a subset of the system bandwidth of the carrier. One or more control regions (e.g., CORESETs) may be configured for a set of the UEs  115 . For example, one or more of the UEs  115  may monitor or search control regions for control information according to one or more search space sets, and each search space set may include one or multiple control channel candidates in one or more aggregation levels arranged in a cascaded manner. An aggregation level for a control channel candidate may refer to a number of control channel resources (e.g., control channel elements (CCEs)) associated with encoded information for a control information format having a given payload size. Search space sets may include common search space sets configured for sending control information to multiple UEs  115  and UE-specific search space sets for sending control information to a specific UE  115 . 
     Each base station  105  may provide communication coverage via one or more cells, for example a macro cell, a small cell, a hot spot, or other types of cells, or any combination thereof. The term “cell” may refer to a logical communication entity used for communication with a base station  105  (e.g., over a carrier) and may be associated with an identifier for distinguishing neighboring cells (e.g., a physical cell identifier (PCID), a virtual cell identifier (VCID), or others). In some examples, a cell may also refer to a geographic coverage area  110  or a portion of a geographic coverage area  110  (e.g., a sector) over which the logical communication entity operates. Such cells may range from smaller areas (e.g., a structure, a subset of structure) to larger areas depending on various factors such as the capabilities of the base station  105 . For example, a cell may be or include a building, a subset of a building, or exterior spaces between or overlapping with geographic coverage areas  110 , among other examples. 
     A macro cell covers a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by the UEs  115  with service subscriptions with the network provider supporting the macro cell. A small cell may be associated with a lower-powered base station  105 , as compared with a macro cell, and a small cell may operate in the same or different (e.g., licensed, unlicensed) frequency bands as macro cells. Small cells may provide unrestricted access to the UEs  115  with service subscriptions with the network provider or may provide restricted access to the UEs  115  having an association with the small cell (e.g., the UEs  115  in a closed subscriber group (CSG), the UEs  115  associated with users in a home or office). A base station  105  may support one or multiple cells and may also support communications over the one or more cells using one or multiple component carriers. 
     In some examples, a carrier may support multiple cells, and different cells may be configured according to different protocol types (e.g., MTC, narrowband IoT (NB-IoT), enhanced mobile broadband (eMBB)) that may provide access for different types of devices. 
     In some examples, a base station  105  may be movable and therefore provide communication coverage for a moving geographic coverage area  110 . In some examples, different geographic coverage areas  110  associated with different technologies may overlap, but the different geographic coverage areas  110  may be supported by the same base station  105 . In other examples, the overlapping geographic coverage areas  110  associated with different technologies may be supported by different base stations  105 . The wireless communications system  100  may include, for example, a heterogeneous network in which different types of the base stations  105  provide coverage for various geographic coverage areas  110  using the same or different radio access technologies. 
     The wireless communications system  100  may support synchronous or asynchronous operation. For synchronous operation, the base stations  105  may have similar frame timings, and transmissions from different base stations  105  may be approximately aligned in time. For asynchronous operation, the base stations  105  may have different frame timings, and transmissions from different base stations  105  may, in some examples, not be aligned in time. The techniques described herein may be used for either synchronous or asynchronous operations. 
     Some UEs  115 , such as MTC or IoT devices, may be low cost or low complexity devices and may provide for automated communication between machines (e.g., via Machine-to-Machine (M2M) communication). M2M communication or MTC may refer to data communication technologies that allow devices to communicate with one another or a base station  105  without human intervention. In some examples, M2M communication or MTC may include communications from devices that integrate sensors or meters to measure or capture information and relay such information to a central server or application program that makes use of the information or presents the information to humans interacting with the application program. Some UEs  115  may be designed to collect information or enable automated behavior of machines or other devices. Examples of applications for MTC devices include smart metering, inventory monitoring, water level monitoring, equipment monitoring, healthcare monitoring, wildlife monitoring, weather and geological event monitoring, fleet management and tracking, remote security sensing, physical access control, and transaction-based business charging. 
     Some UEs  115  may be configured to employ operating modes that reduce power consumption, such as half-duplex communications (e.g., a mode that supports one-way communication via transmission or reception, but not transmission and reception simultaneously). In some examples, half-duplex communications may be performed at a reduced peak rate. Other power conservation techniques for the UEs  115  include entering a power saving deep sleep mode when not engaging in active communications, operating over a limited bandwidth (e.g., according to narrowband communications), or a combination of these techniques. For example, some UEs  115  may be configured for operation using a narrowband protocol type that is associated with a defined portion or range (e.g., set of subcarriers or resource blocks (RBs)) within a carrier, within a guard-band of a carrier, or outside of a carrier. 
     The wireless communications system  100  may be configured to support ultra-reliable communications or low-latency communications, or various combinations thereof. For example, the wireless communications system  100  may be configured to support ultra-reliable low-latency communications (URLLC) or mission critical communications. The UEs  115  may be designed to support ultra-reliable, low-latency, or critical functions (e.g., mission critical functions). Ultra-reliable communications may include private communication or group communication and may be supported by one or more mission critical services such as mission critical push-to-talk (MCPTT), mission critical video (MCVideo), or mission critical data (MCData). Support for mission critical functions may include prioritization of services, and mission critical services may be used for public safety or general commercial applications. The terms ultra-reliable, low-latency, mission critical, and ultra-reliable low-latency may be used interchangeably herein. 
     In some examples, a UE  115  may also be able to communicate directly with other UEs  115  over a device-to-device (D2D) communication link  135  (e.g., using a peer-to-peer (P2P) or D2D protocol). One or more UEs  115  utilizing D2D communications may be within the geographic coverage area  110  of a base station  105 . Other UEs  115  in such a group may be outside the geographic coverage area  110  of a base station  105  or be otherwise unable to receive transmissions from a base station  105 . In some examples, groups of the UEs  115  communicating via D2D communications may utilize a one-to-many (1:M) system in which each UE  115  transmits to other UEs  115  in the group. In some examples, a base station  105  facilitates the scheduling of resources for D2D communications. In other cases, D2D communications are carried out between the UEs  115  without the involvement of a base station  105 . 
     In some systems, the D2D communication link  135  may be an example of a communication channel, such as a sidelink communication channel, between vehicles (e.g., UEs  115 ). In some examples, vehicles may communicate using vehicle-to-everything (V2X) communications, vehicle-to-vehicle (V2V) communications, or some combination of these. A vehicle may signal information related to traffic conditions, signal scheduling, weather, safety, emergencies, or any other information relevant to a V2X system. In some examples, vehicles in a V2X system may communicate with roadside infrastructure, such as roadside units, or with the network via one or more network nodes (e.g., base stations  105 ) using vehicle-to-network (V2N) communications, or with both. 
     The core network  130  may provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions. The core network  130  may be an evolved packet core (EPC) or 5G core (5GC), which may include at least one control plane entity that manages access and mobility (e.g., a mobility management entity (MME), an access and mobility management function (AMF)) and at least one user plane entity that routes packets or interconnects to external networks (e.g., a serving gateway (S-GW), a Packet Data Network (PDN) gateway (P-GW), or a user plane function (UPF)). The control plane entity may manage non-access stratum (NAS) functions such as mobility, authentication, and bearer management for the UEs  115  served by the base stations  105  associated with the core network  130 . User IP packets may be transferred through the user plane entity, which may provide IP address allocation as well as other functions. The user plane entity may be connected to IP services  150  for one or more network operators. The IP services  150  may include access to the Internet, Intranet(s), an IP Multimedia Subsystem (IMS), or a Packet-Switched Streaming Service. 
     Some of the network devices, such as a base station  105 , may include subcomponents such as an access network entity  140 , which may be an example of an access node controller (ANC). Each access network entity  140  may communicate with the UEs  115  through one or more other access network transmission entities  145 , which may be referred to as radio heads, smart radio heads, or transmission/reception points (TRPs). Each access network transmission entity  145  may include one or more antenna panels. In some examples, various functions of each access network entity  140  or base station  105  may be distributed across various network devices (e.g., radio heads and ANCs) or consolidated into a single network device (e.g., a base station  105 ). 
     The wireless communications system  100  may operate using one or more frequency bands, for example, in the range of 300 megahertz (MHz) to 300 gigahertz (GHz). For example, the region from 300 MHz to 3 GHz is known as the ultra-high frequency (UHF) region or decimeter band because the wavelengths range from approximately one decimeter to one meter in length. The UHF waves may be blocked or redirected by buildings and environmental features, but the waves may penetrate structures sufficiently for a macro cell to provide service to the UEs  115  located indoors. The transmission of UHF waves may be associated with smaller antennas and shorter ranges (e.g., less than 100 kilometers) compared to transmission using the smaller frequencies and longer waves of the high frequency (HF) or very high frequency (VHF) portion of the spectrum below 300 MHz. 
     The wireless communications system  100  may also operate in a super high frequency (SHF) region using frequency bands from 3 GHz to 30 GHz, also known as the centimeter band, or in an extremely high frequency (EHF) region of the spectrum (e.g., from 30 GHz to 300 GHz), also known as the millimeter band. In some examples, the wireless communications system  100  may support millimeter wave (mmW) communications between the UEs  115  and the base stations  105 , and EHF antennas of the respective devices may be smaller and more closely spaced than UHF antennas. In some examples, this may facilitate use of antenna arrays within a device. The propagation of EHF transmissions, however, may be subject to even greater atmospheric attenuation and shorter range than SHF or UHF transmissions. The techniques disclosed herein may be employed across transmissions that use one or more different frequency regions, and designated use of bands across these frequency regions may differ by country or regulating body. 
     The wireless communications system  100  may utilize both licensed and unlicensed radio frequency spectrum bands. For example, the wireless communications system  100  may employ License Assisted Access (LAA), LTE-Unlicensed (LTE-U) radio access technology, or NR technology in an unlicensed band such as the 5 GHz industrial, scientific, and medical (ISM) band. When operating in unlicensed radio frequency spectrum bands, devices such as the base stations  105  and the UEs  115  may employ carrier sensing for collision detection and avoidance. In some examples, operations in unlicensed bands may be based on a carrier aggregation configuration in conjunction with component carriers operating in a licensed band (e.g., LAA). Operations in unlicensed spectrum may include downlink transmissions, uplink transmissions, P2P transmissions, or D2D transmissions, among other examples. 
     A base station  105  or a UE  115  may be equipped with multiple antennas, which may be used to employ techniques such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communications, or beamforming. The antennas of a base station  105  or a UE  115  may be located within one or more antenna arrays or antenna panels, which may support MIMO operations or transmit or receive beamforming. For example, one or more base station antennas or antenna arrays may be co-located at an antenna assembly, such as an antenna tower. In some examples, antennas or antenna arrays associated with a base station  105  may be located in diverse geographic locations. A base station  105  may have an antenna array with a number of rows and columns of antenna ports that the base station  105  may use to support beamforming of communications with a UE  115 . Likewise, a UE  115  may have one or more antenna arrays that may support various MIMO or beamforming operations. Additionally or alternatively, an antenna panel may support radio frequency beamforming for a signal transmitted via an antenna port. 
     The base stations  105  or the UEs  115  may use MIMO communications to exploit multipath signal propagation and increase the spectral efficiency by transmitting or receiving multiple signals via different spatial layers. Such techniques may be referred to as spatial multiplexing. The multiple signals may, for example, be transmitted by the transmitting device via different antennas or different combinations of antennas. Likewise, the multiple signals may be received by the receiving device via different antennas or different combinations of antennas. Each of the multiple signals may be referred to as a separate spatial stream and may carry bits associated with the same data stream (e.g., the same codeword) or different data streams (e.g., different codewords). Different spatial layers may be associated with different antenna ports used for channel measurement and reporting. MIMO techniques include single-user MIMO (SU-MIMO), where multiple spatial layers are transmitted to the same receiving device, and multiple-user MIMO (MU-MIMO), where multiple spatial layers are transmitted to multiple devices. 
     Beamforming, which may also be referred to as spatial filtering, directional transmission, or directional reception, is a signal processing technique that may be used at a transmitting device or a receiving device (e.g., a base station  105 , a UE  115 ) to shape or steer an antenna beam (e.g., a transmit beam, a receive beam) along a spatial path between the transmitting device and the receiving device. Beamforming may be achieved by combining the signals communicated via antenna elements of an antenna array such that some signals propagating at some orientations with respect to an antenna array experience constructive interference while others experience destructive interference. The adjustment of signals communicated via the antenna elements may include a transmitting device or a receiving device applying amplitude offsets, phase offsets, or both to signals carried via the antenna elements associated with the device. The adjustments associated with each of the antenna elements may be defined by a beamforming weight set associated with some orientation (e.g., with respect to the antenna array of the transmitting device or receiving device, or with respect to some other orientation). 
     A base station  105  or a UE  115  may use beam sweeping techniques as part of beam forming operations. For example, a base station  105  may use multiple antennas or antenna arrays (e.g., antenna panels) to conduct beamforming operations for directional communications with a UE  115 . Some signals (e.g., synchronization signals, reference signals, beam selection signals, or other control signals) may be transmitted by a base station  105  multiple times in different directions. For example, the base station  105  may transmit a signal according to different beamforming weight sets associated with different directions of transmission. Transmissions in different beam directions may be used to identify (e.g., by a transmitting device, such as a base station  105 , or by a receiving device, such as a UE  115 ) a beam direction for later transmission or reception by the base station  105 . 
     Some signals, such as data signals associated with a receiving device, may be transmitted by a base station  105  in a single beam direction (e.g., a direction associated with the receiving device, such as a UE  115 ). In some examples, the beam direction associated with transmissions along a single beam direction may be determined based on a signal that was transmitted in one or more beam directions. For example, a UE  115  may receive one or more of the signals transmitted by the base station  105  in different directions and may report to the base station  105  an indication of the signal that the UE  115  received with a high signal quality or an otherwise acceptable signal quality. 
     In some examples, transmissions by a device (e.g., by a base station  105  or a UE  115 ) may be performed using multiple beam directions, and the device may use a combination of digital precoding or radio frequency beamforming to generate a combined beam for transmission (e.g., from a base station  105  to a UE  115 ). The UE  115  may report feedback that indicates precoding weights for one or more beam directions, and the feedback may correspond to a configured number of beams across a system bandwidth or one or more sub-bands. The base station  105  may transmit a reference signal (e.g., a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS)), which may be precoded or unprecoded. The UE  115  may provide feedback for beam selection, which may be a precoding matrix indicator (PMI) or codebook-based feedback (e.g., a multi-panel type codebook, a linear combination type codebook, a port selection type codebook). Although these techniques are described with reference to signals transmitted in one or more directions by a base station  105 , a UE  115  may employ similar techniques for transmitting signals multiple times in different directions (e.g., for identifying a beam direction for subsequent transmission or reception by the UE  115 ) or for transmitting a signal in a single direction (e.g., for transmitting data to a receiving device). 
     A receiving device (e.g., a UE  115 ) may try multiple receive configurations (e.g., directional listening) when receiving various signals from the base station  105 , such as synchronization signals, reference signals, beam selection signals, or other control signals. For example, a receiving device may try multiple receive directions by receiving via different antenna subarrays, by processing received signals according to different antenna subarrays, by receiving according to different receive beamforming weight sets (e.g., different directional listening weight sets) applied to signals received at multiple antenna elements of an antenna array, or by processing received signals according to different receive beamforming weight sets applied to signals received at multiple antenna elements of an antenna array, any of which may be referred to as “listening” according to different receive configurations or receive directions. In some examples, a receiving device may use a single receive configuration to receive along a single beam direction (e.g., when receiving a data signal). The single receive configuration may be aligned in a beam direction determined based on listening according to different receive configuration directions (e.g., a beam direction determined to have a high signal strength, high signal-to-noise ratio (SNR), or otherwise acceptable signal quality based on listening according to multiple beam directions). 
     The wireless communications system  100  may be a packet-based network that operates according to a layered protocol stack. In the user plane, communications at the bearer or Packet Data Convergence Protocol (PDCP) layer may be IP-based. A Radio Link Control (RLC) layer may perform packet segmentation and reassembly to communicate over logical channels. A Medium Access Control (MAC) layer may perform priority handling and multiplexing of logical channels into transport channels. The MAC layer may also use error detection techniques, error correction techniques, or both to support retransmissions at the MAC layer to improve link efficiency. In the control plane, the Radio Resource Control (RRC) protocol layer may provide establishment, configuration, and maintenance of an RRC connection between a UE  115  and a base station  105  or a core network  130  supporting radio bearers for user plane data. At the physical layer, transport channels may be mapped to physical channels. 
     The UEs  115  and the base stations  105  may support retransmissions of data to increase the likelihood that data is received successfully. Hybrid automatic repeat request (HARQ) feedback is one technique for increasing the likelihood that data is received correctly over a communication link  125 . HARQ may include a combination of error detection (e.g., using a cyclic redundancy check (CRC)), forward error correction (FEC), and retransmission (e.g., automatic repeat request (ARQ)). HARQ may improve throughput at the MAC layer in poor radio conditions (e.g., low signal-to-noise conditions). In some examples, a device may support same-slot HARQ feedback, where the device may provide HARQ feedback in a specific slot for data received in a previous symbol in the slot. In other cases, the device may provide HARQ feedback in a subsequent slot, or according to some other time interval. 
     A UE  115  may operate in accordance with various states or modes for communicating with a network. As an example, a UE may operate in an RRC idle state (e.g., RRC_IDLE), an RRC inactive state (e.g., RRC_INACTIVE), and/or an RRC connected state (e.g., RRC_CONNECTED). The UE  115  may transition between the various states or modes, for example, based on communications traffic for the UE  115 . In the RRC idle state (which may be referred to as an idle mode), a UE  115  may not be registered to a cell, and may accordingly lack an access stratum (AS) context, and the UE  115  may thus not have an active RRC connection established with the network (e.g., via a base station  105 ). In the idle mode, the UE  115  may wake up periodically to monitor channels for paging or other signaling, and the mobility of the UE  115  may be managed by the UE  115  when performing measurements of one or more cells. In the RRC connected state (which may be referred to as a connected mode), the UE  115  may have an established RRC connection (e.g., with a 5GC) where the UE  115  may store an AS context. Here, the UE  115  may belong to a known cell and may be identified using a cell radio network temporary identifier (C-RNTI) assigned to the UE  115 . While in the connected mode, the UE  115  may monitor for messages transmitted by the network, which may include monitoring various channels (e.g., paging channels, control channels, or the like). 
     The RRC inactive state may be used to reduce signaling overhead and may provide an intermediate mode (e.g., between idle and connected), which may also be used to reduced latency when transitioning to another mode (e.g., to the connected mode). The UE  115  may periodically wake up while in the inactive mode to monitor for paging messages from the network, where the UE  115  may in some cases, perform a random access procedure to move to the connected mode and communicate with the network. 
     In wireless communications system  100 , a UE  115  may connect to an LTE cell in a non-standalone mode of operation. The UE  115  may support dual connectivity with NR and LTE. Additionally, a 5G dual-subscriber identity module UE  115  (e.g., phone) may support two subscriptions. While operating in the non-standalone mode of operation, the UE  115  may be configured with a first set of bands for a first subscription and a second set of bands for a second subscription. In some examples, UE hardware may be designed such that a first band on the first subscription and a second band on the second subscription has the same downlink path. For example, the first band and the second band may have the same downlink path (e.g., share common resources) resulting in a full tune away of the first band during a paging operation on the second band. 
     One or more aspects of the present disclosure provides for a UE  115  determining that a combination of bands are not fully concurrent and may cause the UE  115  to perform a full tune-away when communicating using the combination of bands. In some examples, the UE  115  may identify a first set of bands associated with a first subscription and a second set of bands associated with a second subscription. In some examples, the second subscription may be different from the first subscription. The UE  115  may determine that a first band from the first set of bands and a second band from the second set of bands share a set of radio frequency front-end resources (e.g., a same downlink path from an RF front-end component of the UE). That is, the UE  115  may determine that the first band and the second band are associated with a common downlink path. The UE  115  may then refrain from communicating on a third band from the first set of bands (and associated with the first subscription) that is associated with a secondary component carrier while communicating on a remaining set of bands from the first set of bands and the second set of bands (e.g., excluding the third band). In some examples, the third band may be different from the first band and the second band. The UE  115  may refrain from communicating based on determining that the first band from and the second band share the set of radio frequency front-end resources and the third band being associated with the secondary component carrier. It is noted that a band may also be described as an RF spectrum band, and these terms may be interchangeable. As such, reference to a first band or second band herein may also be described as a first RF spectrum band or a second RF spectrum band, respectively. 
       FIG. 2  illustrates an example of a wireless communications system  200  that supports techniques for enhancing user equipment performance for multiple subscriber identification module operation in accordance with aspects of the present disclosure. In some examples, the wireless communications system  200  may implement aspects of the wireless communications system  100 . The wireless communications system  200  may include base station  205 - a,  base station  205 - b,  and UE  215 , which may be examples of base stations  105  and a UE  115  as described with reference to  FIG. 1 . Each base station  105  may serve a geographic coverage area. In some cases, one or more of the geographic coverage areas served by base stations  205 - a  and  205 - b  may overlap. In some cases, the UE  215  may be configured with multiple subscriber identification module functionality and may be configured to support improved multiple subscription communications by communicating of a subset of configured bands. For example, a UE hardware may be designed such that a first band on the first subscription and a second band on the second subscription share a same downlink path. In such cases, the UE  215  may refrain from communicating on a combination of bands causing full tune-away to improve communications. 
     In the example of  FIG. 2 , the UE  215  may operate in a non-standalone mode. That is, the UE  215  may support a non-standalone architecture, where different radio access technologies may be utilized concurrently or simultaneously by different serving base stations. For example, a non-standalone UE may anchor on or connect to a first cell while facilitating communications with a second cell. Additionally or alternatively, a non-standalone UE may anchor on or connect to a cell associated with a first radio access technology (e.g., LTE), while facilitating communications with a cell associated with a second radio access technology (e.g., NR). In some cases, the cells associated with each radio access technology may be contained at a single base station or may be located on separate base stations. 
     In some examples, the UE  215  may support multiple subscriptions. In some cases, the UE  215  may be an example of a dual-subscriber identification module, or multi-subscriber identification module. For example, the UE  215  may include a first subscriber identification module  207  (SIM  207 ) and a second subscriber identification module  210  (SIM  210 ). The first subscriber identification module  207  may provide a first subscription (which may be referred to as a default data SIM (DDS), and the second subscriber identification module  210  may provide a second subscription (which may be referred to as a non-DDS). In some cases, one or both subscriptions (e.g., the first subscriber identification module  207  and the second subscriber identification module  210 ) may be configured to support a non-standalone architecture. In some instances, the first subscriber identification module  207  and the second subscriber identification module  210  may be camped on a first cell. That is, the UE  215  may communicate with a first cell via the first subscription and may concurrently or simultaneously communicate with the first cell via the second subscription. In some cases, the first cell may be supported by a different base station  105 , or the first cell may be supported by the same base station  105 , or any combination thereof. In some cases, the first cell may be associated with a radio access technology. In some cases, each network may be supported by a different base station  105 , or each network may be supported by the same base station  105 , or any combination thereof. In one example, the base station  205 - a  and the base station  205 - b  may support a non-standalone 5G network. In some cases, a network may refer to a cell. 
     Because the UE  215  is configured with two subscriptions, the UE  215  may support communications with two base stations  205  (e.g., base station  205 - a  and base station  205 - b ) at a time. As depicted herein, the UE  215  may be configured to support dual-connectivity or other non-standalone communications schemes. In one example, the UE  215  may communicate with base station  205 - a  associated with a first cell (e.g., an anchor cell) associated with a radio access technology (e.g., a 5G network, an LTE network, or a 4G network) via communication link  220 . For example, the UE  215  may establish a connection with the base station  205 - a  for a first subscription and a second subscription via communication link  220 . As depicted herein, the UE  215  may establish a connection with the base station  205 - b  over communication link  225 . Additionally or alternatively, as the UE  215  is configured to support dual-connectivity, the UE  215  may support communications with two base stations  205  (e.g., two networks) at a time. 
     In some aspects, the UE  215  may support a dual subscriber identification module dual standby mode (dual-sim dual-standby). The dual-sim dual-standby mode enables devices to receive on two different subscriber identification module subscriptions. A tune-away feature may allow the UE  215  to receive paging on one subscription while remaining active in another subscription (e.g., remaining or initiating a packet switched call in a second subscription). Additionally or alternatively, a dual receive feature may enable simultaneous receive on two technologies on two different subscriptions. In some examples, dual receive may be different than dual active model. Specifically, dual active mode may support a single transmission. In the dual-sim dual-standby mode, the UE  215  may be able to avoid tune-away and receive on two different technologies if they are operating in different bands. This may further depend on the operating modes of the UE  215 . 
     In some examples, the UE  215  may support a dual-receive full-concurrency mode. In such examples, the UE  215  may support a tune-away operation from a first radio access technology in data traffic to a second radio access technology in idle state may be eliminated. In some examples, the UE  215  may be configured to monitor pages on a first subscription without hampering communications on a second subscription. For example, NR frequency range 1 (FR1) may utilize a primary receive path (PRx1), a diversity receive path (DRx1), and a transmit path (TX) on a first subscription and LTE may utilize another primary receive path (PRx2) or different resources for idle-mode operations on a second subscription. Thus, NR may have full receive data capability as well full capability to support MIMO. In some examples, NR FR1 throughput may be unimpacted and communications may be within some statistical variance. In some examples, the UE  215  may support a diversity sharing mode (e.g., diversity tune-away). In the diversity tune-away mode, the first subscription supporting data traffic may lose the secondary RF chain when tech 2 is awake for idle operations. A diversity tune-away may occur due to a restriction on the RF front end and for some band combinations. For example, LTE may utilize PRx1 and Tx and Global System for Mobile Communications (GSM) may utilize DRx1. In some examples, LTE may lose receive diversity (RxD) as well MIMO capabilities for the duration of the tune-away. 
     A UE may additionally or alternatively operate in accordance with a full tune-away (non-dual receive) or a hybrid fallback mode. In the example of full tune-away, data traffic from a first subscription may be tuned away to a second subscription in idle state. For example, in full tune-away mode, NR traffic on the first subscription may lose RF resources to GSM resources on the second subscription for the duration of activity on the second subscription. The full tune-away or hybrid fallback mode may be invoked when GSM experiences poor paging performance (e.g., when the UE  215  detects three consecutive page decode failures or three transceiver resource manager (TRM) denials for page decode). In such cases, the UE  215  may fall back to a tune-away mode to enhance paging performance. Additionally or alternatively, the full tune-away or hybrid fallback mode may be invoked when GSM enters an access or traffic state for mobile originated/mobile terminated voice call, mobile originated/mobile terminated messaging on traffic channel, and GSM Location Area Update (LAU). In some examples, the full tune-away or hybrid fallback mode may be invoked when a technology enters an acquisition state. 
     In some systems, a UE  215  may connect to an LTE cell in a non-standalone mode. A non-standalone mode may refer to a deployment of a first radio access technology (e.g., 5G NR) that may use a control plane of another radio access technology (e.g., 4G LTE), whereas the first radio access technology may handle user plane functions. Alternatively, a standalone mode may refer to a single radio access technology used for both control and user plane functions. In some examples, the UE  215  may support dual-connectivity with NR and LTE. Additionally, a dual-SIM UE (e.g., phone) can have two subscriptions. 
     While operating in the non-standalone mode, the UE  215  may identify or may otherwise be configured with a first set of bands for a first subscription and a second set of bands for a second subscription. In some instances, a UE  215  hardware may be designed such that a first band on the first subscription and a second band on the second subscription has the same downlink path or set of resources. In some examples, UE hardware may support standalone or non-standalone multiple subscriber identification module configuration. In some examples, a first subscription at the UE  215  may support the non-standalone mode or the standalone mode, while a second subscription at the UE  215  may support the standalone mode (e.g., using NR/LTE/WCDMA/GSM/1x). For instance, the first band on the first subscription and a second band on the second subscription may share the same set of RF front end resources. As an illustrative example, the UE  215  may be configured with an LTE B66 band, an LTE B2 band (which may correspond to a secondary component carrier of a carrier aggregation scheme), and an NR n71 band on the first subscription. The UE  215  may be further configured with a WCDMA B2 band on the second subscription. In this example, the n71 band and the WCDMA B2 band may have or share the same RF front-end resources and/or downlink path resulting in a full tune away of the n71 band, for example, during a paging operation on the WCDMA B2 band. In such cases, the full tune away may be enforced on the UE  215  in order to decode paging on the WCDMA B2 band. Such a full tune away of the n71 band may impact communications, for example, high-throughput communications using NR technology on the n71 band, which may lead to degraded performance. Additionally or alternatively, full tune-away at the UE  215  may break multiple subscriber identification module configurations. The performance impact at the UE  215  from the tune away may result in decreased user experience. 
     However, in some cases, the LTE B2 (downlink secondary component carrier) may be removed (e.g., when the UE  215  was configured with B66 band and n71 band on the first subscription and WB2 band on the second subscription), the n71 and WB2 may use different ports (e.g., SDR ports) and thus n71 may be fully concurrent with WB2. Thus, to mitigate the communications interruptions between a UE (such as UE  215 ) in a non-standalone mode of operation and a cell, the UE  215  may be configured to support improved communications. As an example, to decrease latency and improve resource efficiency, the UE  215  may determine that a combination of bands are not fully concurrent and that the UE may perform a full tune away when communicating using the combination of bands. The UE  215  may then refrain from communicating on one of the bands from the determined combination of bands. In some examples, if an LTE secondary component carrier is configured (may or may not be activated) for the first subscription, the UE  215  may drop the secondary component carrier, which may enable the UE  215  to perform a paging operation on the second subscription without a full tune away. In some examples, the UE  215  may deprioritize some combination of bands which causes the UE to switch to a full tune away mode when activated. In some examples, the UE  215  may determine that a combination of bands causes the UE 215  to switch to a full tune away mode. In such examples, the UE  215  may remove advertising of such combination in a capability report. 
     According to one or more aspects or the present disclosure, the UE  215  may be configured to run in full concurrency mode to enhance throughput or performance. In some cases, running in full concurrency mode when configured with, for example, NR sub-6 GHz bands may enhance the performance at the UE  215  and the NR sub-6 GHz bands support higher bandwidth or throughput. To achieve full concurrency, the UE  215  may identify which bands or carrier aggregation or dual connectivity combinations are fully concurrent and which bands are associated with a full tune-away at the UE  215 . For example, the UE  215  may identify a first set of bands associated with a first subscription (SIM  207 ) and may identify a second set of bands associated with a second subscription (SIM  210 ) different from the first subscription. The UE  215  may then determine that a first band from the first set of bands and a second band from the second set of bands share a set of RF front-end resources, where a third band from the first set of bands is associated with a secondary component carrier of a multi-carrier communications scheme. The UE  215  may refrain from communicating on the third band while communicating (e.g., simultaneously) on a remaining set of bands from the first set of bands as well as the second set of bands. For instance, the UE  215  may refrain from communicating based on determining that the first band from the first set of bands and the second band from the second set of bands share the set of RF front-end resources and the third band being associated with the secondary component carrier. 
     In some examples, if the UE  215  determines that the secondary component carrier is configured but not activated, then the UE  215  may drop that secondary component carrier which causes the UE  215  to perform a full tune-away to read pages on the second subscription (SIM  210 ). For example, the UE  215  may determine that the third band is configured as the secondary component carrier. The UE  215  may further determine an absence of control signaling activating the third band associated with the secondary component carrier. In such examples, the UE  215  may refrain from communicating on the third band, which may include dropping the third band associated with the secondary component carrier based on the absence of the control signaling activating the third. 
     According to one or more aspects, the UE  215  may drop an activated secondary component carrier. For example, the UE  215  may receive, from the base station  205 - a,  control signaling activating the third band associated with the secondary component carrier on the first subscription (SIM  207 ). The UE  215  may determine that the third band associated with the secondary component carrier and is activated based on receiving the control signaling. In such examples, the UE  215  may drop the third band associated with the secondary component carrier based on determining that the first band from the first set of bands and the second band from the second set of bands share the set of RF front-end resources and the third band being activated. The UE  215  may drop the secondary component carrier locally or by reporting compensated measurement so that the network de-configures the secondary component carrier. For example, the UE  215  may report (e.g., to the base station  205 - a ) a compensated measurement on the third band associated with the secondary component carrier based on determining that the first band from the first set of bands and the second band from the second set of bands share the set of RF front-end resources and the third band being activated. In some aspects, the UE  215  may drop the third band based on the reported compensated measurement. 
     Techniques described herein may provide for the UE  215  identifying a number of resource grants associated with the secondary component carrier based on the third band being activated. In some examples, the UE  215  may drop the third band based on the identified number of resource grants associated with the secondary component carrier. That is, the UE  215  may determine whether to drop an activated secondary component carrier based on resource block grants on secondary component carrier which is blocking full concurrency at the UE  215 . 
     In some examples, the UE  215  may deprioritize the third band from the first set of bands based on determining that the first band from the first set of bands and the second band from the second set of bands share the set of RF front-end resources. For instance, the UE  215  may deprioritize a carrier aggregation combination (including the secondary component carrier) which causes the UE  215  to perform a full tune-away operation. In such cases, the UE  215  may transmit no measurements or compensated measurements for the band. That is, the UE  215  may report a compensated measurement on the third band from the first set of bands (e.g., corresponding to a secondary component carrier) based on determining that the first band from the first set of bands and the second band from the second set of bands share the set of RF front-end resources. Alternatively, the UE  215  may refrain from reporting a measurement on the first band from the first set of bands based on determining that the first band from the first set of bands and the second band from the second set of bands share the set of RF front-end resources. 
     In some examples, the UE  215  may simultaneously communicate on a remaining set of bands for the first subscription of the UE  215  and the second set of bands for the second subscription of the UE  215  based on refraining from communicating on the first band associated with the secondary component carrier. Additionally or alternatively, the UE  215  may determine that a combination of the first band and the third band from the first set of bands and the second band from the second set of bands may be associated with a full tune-away operation with the second subscription (SIM  207 ) at the UE  215 . 
     In some examples, the UE  215  may transmit, to the base station  205 - a,  a capability report excluding a combination of bands that may be associated with the full tune away (e.g., the first band and the third band). The UE  215  may transmit the capability report based on determining that the first band from the first set of bands and the second band from the second set of bands share the set of RF front-end resources. That is, the UE  215  may identify a set of multiple combinations of the first set of bands and the second set of bands for communicating with the base station. The UE  215  may then transmit the capability report including a remaining number of combinations of the set of multiple combinations of the first set of bands and the second set of bands. The techniques described herein may thus provide for improved throughput and performance due to the UE  215  operating in full-concurrency mode. Additionally or alternatively, the techniques described herein provides for improved power usage due to less retransmission and in turn provides enhanced user experience. Further, the techniques may avoid modifications to the hardware of the UE  215 , which may be costly and undesirable. 
       FIG. 3  illustrates an example of a hardware configuration  300  that supports techniques for enhancing user equipment performance for multiple subscriber identification module operation in accordance with aspects of the present disclosure. In some examples, the hardware configuration  300  may implement aspects of the wireless communications system  100  and the wireless communications system  200 . The hardware configuration  300  may be included in a UE, which may be examples of UE  115  as described with reference to  FIG. 1  or a UE  215  described with reference to  FIG. 2 . The hardware configuration  300  may be included in a UE configured to support multiple subscriber identification module functionality. 
     As depicted in the example of  FIG. 3 , the hardware configuration  300  include a hardware portion  315  and a RF front end  310 . The RF front end  310  may be coupled with a first antenna  305 - a  and a second antenna  305 - b.  While two antennas  305  are illustrated, the hardware configuration  300  may include a different number of antennas  305 . In some examples, the RF front end  310  may be configured to transmit or receive communication using the first antenna  305 - a  and the second antenna  305 - b.  Although two antennas are depicted in the example of  FIG. 3 , it may be understood that any number of antennas may be coupled with the RF front end  310 . The hardware portion  315  may be an example of one or more processors and/or system on chip (SoC) (e.g., a SoC having some advanced reduced instruction set computing (RISC) machine (ARM) architecture). The hardware portion may provide functionality for transmitting and receiving signals, for example, through the RF front end  310 . 
     In some examples, the UE may identify or be otherwise be configured with a first set of bands associated with the first subscription. Additionally or alternatively, the UE may identify or be otherwise configured with a second set of bands associated with the second subscription different from the first subscription. In the example of  FIG. 3 , the UE may be configured with a first band  320 , a second band  325  and a third band  330  associated with the first subscription. The UE may also be configured with a fourth band  335  associated with the second subscription. The band  340  and the band  345  may be associated with transmission from the UE (using first subscription or second subscription or both). In some cases, the first band  320  may be associated with a secondary component carrier (e.g., a downlink secondary component carrier) of a multi-carrier communications scheme. 
     According to one or more aspects, the UE may determine that the third band  330  from the first set of bands and the fourth band from the second set of bands share a set of RF front-end resources (e.g., DLP 1 ). In one example, the first band  320  may correspond to an LTE B2 band, the second band  325  may correspond to an LTE B66 band, the third band  330  may correspond to an NR n71 band, and the fourth band  335  may correspond to a WCDMA B2 band. In such cases, the UE may determine that the combination of the first band  320  and the fourth band  335  causes the UE to perform a full tune-away operation, as the first band  320  and the fourth band  335  may share a same set of RF front end resources. It is noted that the examples of the bands described herein are provided for illustrative purposes, and should not be considered limiting. That is, other bands associated with other radio access technologies may be possible, and the examples provided herein are some possible bands that may be used. 
     Upon determining that the third band  330  and the fourth band  335  share a common set of RF front-end resources (e.g., DLP1), the UE may refrain from communicating on the first band  320 , which may also be configured as the downlink secondary component carrier. For example, the UE may drop communications on the first band  320  upon determining that the third band  330  and the fourth band  335  share the common set of RF front-end resources. In some examples, instead of dropping, the UE may report a compensated measurement on the first band  320 . By avoiding communications on the first band  320 , the UE may avoid a full tune-away operation resulting in enhanced performance. For example, dropping and/or deprioritizing communications on the first band may free up resources for communications on the fourth band  335 , which may likewise avoid the full tune away on the third band  330 . Specifically, dropping the first band  320  may enable different ports (e.g., SDR ports) to be used between the two subscriptions, and the third band  330  and the fourth band  335  may be fully concurrent as a result. 
       FIG. 4  illustrates an example of a process flow  400  in a system that supports techniques for enhancing user equipment performance for multiple subscriber identification module operation in accordance with aspects of the present disclosure. In some examples, process flow  400  may implement aspects of wireless communications system  100  and wireless communications system  200 . A UE  415  may be an example of a UE  115  described with reference to  FIGS. 1 and 2  and a base station  405  may be an example of a base station  105  described with reference to  FIGS. 1 and 2 . 
     In the following description of the process flow  400 , the operations between the base station  405  and the UE  415  may be transmitted in a different order than the exemplary order shown. The operations performed by the base station  405  or the UE  415  may be performed in different orders or at different times than the exemplary order shown. Some operations may also be omitted from the process flow  400 , or other operations may be added to the process flow  400 . Further, the base station  405  and the UE  415  are not limiting, as the present disclosure may be associated with any number of different devices. 
     At  420 , the UE  415  may identify a first set of bands associated with a first subscription. The UE  415  may also identify a second set of bands associated with a second subscription different from the first subscription. In some examples, a communication state for the first band (or the first set of bands) may include a dual-connectivity mode, and a communication state for the second band (or the second set of bands) may include an idle mode. In some examples, the first subscription may be associated with a multi-carrier operation (e.g., carrier aggregation) and the second subscription may be associated with a single-carrier operation. 
     At  425 , the base station  405  may optionally transmit control signaling to the UE  415 . The UE  415  may receive, from the base station  405 , the control signaling activating a band associated with a secondary component carrier. For example, a third band from the first set of bands (and associated with the first subscription) may be activated as the secondary component carrier of a multi-carrier communications scheme or deployment. In some examples, the secondary component carrier may be a downlink secondary component carrier. 
     At  430 , the UE  415  may optionally determine that the third band is configured as the secondary component carrier. In some examples, the UE  415  may additionally determine an absence of control signaling activating the third band associated with the secondary component carrier. Additionally or alternatively, the UE  415  may determine that the third band associated with the secondary component carrier is activated based on receiving the control signaling. 
     At  435 , the UE  415  may determine that at least a first band from the first set of bands and at least a second band from the second set of bands share a same set of RF front-end resources. As described herein, the first band and the second band sharing the same RF front-end resources may result in a full tune away operation, which may impact communications efficiency at the UE  415 . As such, the UE  415  may perform techniques to enable full concurrency between bands of the different subscriptions, which may, for example, include dropping or deprioritizing another band from the first subscription (e.g., from the first set of bands). Here, the third band corresponding to the secondary component carrier may be dropped or deprioritized. 
     At  440 , the UE  415  may optionally transmit, to the base station  405 , a capability report that excludes multi-carrier combinations, which may involve excluding a combination of the first band and the third band based on determining that the first band from the first set of bands and the second band from the second set of bands share the set of RF front-end resources. Put another way, the first band and the third band may be associated with multi-carrier operations (e.g., carrier aggregation), and because of the resource conflict caused between the first band and the second band, the UE  415  may exclude the combination of the first band and the third band (e.g., both from the first set of bands and associated with the same subscription) in a capability report to the base station  405 . Additionally or alternatively, the UE  415  may identify a set of combinations of the first set of bands and the second set of bands for communicating with the base station. In some examples, a combination of the first band and the second band may be included in the set of combinations. The UE  415  may then transmit the capability report including a remaining number of combinations of the set of combinations of the first set of bands and the second set of bands. 
     In some examples, at  445 , the UE  415  may report a compensated measurement on the third band associated with the secondary component carrier based on determining that at least the first band from the first set of bands and at least the second band from the second set of bands share the set of RF front-end resources and the third band being activated. In some examples, the third band may be dropped based on the reported compensated measurement. 
     In some instances, the UE  415  may identify a number of resource grants associated with the secondary component carrier based on the third band being activated. In some examples, the third band may be dropped based on the identified number of resource grants associated with the secondary component carrier. 
     Additionally or alternatively, the UE  415  may deprioritize the third band from the first set of bands based on determining that the first band from the first set of bands and the second band from the second set of bands share the set of RF front-end resources. The UE  415  may then report a compensated measurement (e.g., at  445 ) on the third band from the first set of bands based on determining that the first band from the first set of bands and the second band from the second set of bands share the set of RF front-end resources. Although not depicted in the example of  FIG. 4 , it may be understood that the UE  415  may refrain from reporting a measurement on the third band from the first set of bands based on determining that the first band from the first set of bands and the second band from the second set of bands share the set of RF front-end resources. 
     At  450 , the UE  415  may communicate with the base station  405 . For example, the UE  415  may refrain from communicating on the third band while communicating on a remaining set of bands for the first subscription of the UE (e.g., a remaining set of bands from the first set of bands) and the second set of bands for the second subscription of the UE based on refraining from communicating on the first band associated with the secondary component carrier. In some examples, refraining from communicating on the third band may be based on determining that the first band from the first set of bands and the second band from the second set of bands share the set of RF front-end resources and the third band being associated with the secondary component carrier. In some aspects, the UE  415  may drop the third band associated with the secondary component carrier based on determining that the first band from the first set of bands and the second band from the second set of bands share the set of RF front-end resources and the first band being activated. When communicating on the bands (e.g., excluding the third band), the UE  415  may simultaneously communicate on the remaining set of bands for the first subscription of the UE (e.g., a remaining set of bands from the first set of bands) and the second set of bands for the second subscription of the UE. 
       FIG. 5  shows a block diagram  500  of a device  505  that supports techniques for enhancing user equipment performance for multiple subscriber identification module operation in accordance with aspects of the present disclosure. The device  505  may be an example of aspects of a UE  115  as described herein. The device  505  may include a receiver  510 , a transmitter  515 , and a communications manager  520 . The device  505  may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses). 
     The receiver  510  may provide a means for receiving information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to techniques for enhancing user equipment performance for multiple subscriber identification module operation). Information may be passed on to other components of the device  505 . The receiver  510  may utilize a single antenna or a set of multiple antennas. 
     The transmitter  515  may provide a means for transmitting signals generated by other components of the device  505 . For example, the transmitter  515  may transmit information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to techniques for enhancing user equipment performance for multiple subscriber identification module operation). In some examples, the transmitter  515  may be co-located with a receiver  510  in a transceiver module. The transmitter  515  may utilize a single antenna or a set of multiple antennas. 
     The communications manager  520 , the receiver  510 , the transmitter  515 , or various combinations thereof or various components thereof may be examples of means for performing various aspects of techniques for enhancing user equipment performance for multiple subscriber identification module operation as described herein. For example, the communications manager  520 , the receiver  510 , the transmitter  515 , or various combinations or components thereof may support a method for performing one or more of the functions described herein. 
     In some examples, the communications manager  520 , the receiver  510 , the transmitter  515 , or various combinations or components thereof may be implemented in hardware (e.g., in communications management circuitry). The hardware may include a processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic, discrete hardware components, or any combination thereof configured as or otherwise supporting a means for performing the functions described in the present disclosure. In some examples, a processor and memory coupled with the processor may be configured to perform one or more of the functions described herein (e.g., by executing, by the processor, instructions stored in the memory). 
     Additionally or alternatively, in some examples, the communications manager  520 , the receiver  510 , the transmitter  515 , or various combinations or components thereof may be implemented in code (e.g., as communications management software or firmware) executed by a processor. If implemented in code executed by a processor, the functions of the communications manager  520 , the receiver  510 , the transmitter  515 , or various combinations or components thereof may be performed by a general-purpose processor, a DSP, a central processing unit (CPU), an ASIC, an FPGA, or any combination of these or other programmable logic devices (e.g., configured as or otherwise supporting a means for performing the functions described in the present disclosure). 
     In some examples, the communications manager  520  may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using or otherwise in cooperation with the receiver  510 , the transmitter  515 , or both. For example, the communications manager  520  may receive information from the receiver  510 , send information to the transmitter  515 , or be integrated in combination with the receiver  510 , the transmitter  515 , or both to receive information, transmit information, or perform various other operations as described herein. 
     The communications manager  520  may support wireless communications at a UE in accordance with examples as disclosed herein. For example, the communications manager  520  may be configured as or otherwise support a means for identifying a first set of bands associated with a first subscription. The communications manager  520  may be configured as or otherwise support a means for identifying a second set of bands associated with a second subscription different from the first subscription. The communications manager  520  may be configured as or otherwise support a means for determining that a first band from the first set of bands and a second band from the second set of bands share a set of radio frequency front-end resources. The communications manager  520  may be configured as or otherwise support a means for refraining from communicating on a third band from the first set of bands, the third band being associated with a secondary component carrier of a multi-carrier communications scheme, where refraining from communicating on the third band is based on determining that the first band and the second band share the set of radio frequency front-end resources and the third band being associated with the secondary component carrier. The communications manager  520  may be configured as or otherwise support a means for communicating on a remaining set of bands from the first set of bands and the second set of bands based on refraining from communicating on the third band. 
     Additionally or alternatively, the communications manager  520  may support wireless communications at a UE in accordance with examples as disclosed herein. For example, the communications manager  520  may be configured as or otherwise support a means for identifying a first set of bands associated with a first subscription. The communications manager  520  may be configured as or otherwise support a means for identifying a second set of bands associated with a second subscription different from the first subscription. The communications manager  520  may be configured as or otherwise support a means for determining that a first band from the first set of bands and a second band from the second set of bands share a set of radio frequency front-end resources. The communications manager  520  may be configured as or otherwise support a means for transmitting, to a base station, a capability report excluding the first band and a third band from the first set of bands based on determining that the first band and the second band share the set of radio frequency front-end resources, the third band being associated with a secondary component carrier of a multi-carrier communications scheme. 
     By including or configuring the communications manager  520  in accordance with examples as described herein, the device  505  (e.g., a processor controlling or otherwise coupled to the receiver  510 , the transmitter  515 , the communications manager  520 , or a combination thereof) may support techniques for higher throughput, better performance, reduced processing, reduced power consumption, more efficient utilization of communication resources. 
       FIG. 6  shows a block diagram  600  of a device  605  that supports techniques for enhancing user equipment performance for multiple subscriber identification module operation in accordance with aspects of the present disclosure. The device  605  may be an example of aspects of a device  505  or a UE  115  as described herein. The device  605  may include a receiver  610 , a transmitter  615 , and a communications manager  620 . The device  605  may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses). 
     The receiver  610  may provide a means for receiving information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to techniques for enhancing user equipment performance for multiple subscriber identification module operation). Information may be passed on to other components of the device  605 . The receiver  610  may utilize a single antenna or a set of multiple antennas. 
     The transmitter  615  may provide a means for transmitting signals generated by other components of the device  605 . For example, the transmitter  615  may transmit information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to techniques for enhancing user equipment performance for multiple subscriber identification module operation). In some examples, the transmitter  615  may be co-located with a receiver  610  in a transceiver module. The transmitter  615  may utilize a single antenna or a set of multiple antennas. 
     The device  605 , or various components thereof, may be an example of means for performing various aspects of techniques for enhancing user equipment performance for multiple subscriber identification module operation as described herein. For example, the communications manager  620  may include a band identification component  625 , a resource determination component  630 , a transmission component  635 , a capability report component  640 , or any combination thereof. The communications manager  620  may be an example of aspects of a communications manager  520  as described herein. In some examples, the communications manager  620 , or various components thereof, may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using or otherwise in cooperation with the receiver  610 , the transmitter  615 , or both. For example, the communications manager  620  may receive information from the receiver  610 , send information to the transmitter  615 , or be integrated in combination with the receiver  610 , the transmitter  615 , or both to receive information, transmit information, or perform various other operations as described herein. 
     The communications manager  620  may support wireless communications at a UE in accordance with examples as disclosed herein. The band identification component  625  may be configured as or otherwise support a means for identifying a first set of bands associated with a first subscription. The band identification component  625  may be configured as or otherwise support a means for identifying a second set of bands associated with a second subscription different from the first subscription. The resource determination component  630  may be configured as or otherwise support a means for determining that a first band from the first set of bands and a second band from the second set of bands share a set of radio frequency front-end resources. The transmission component  635  may be configured as or otherwise support a means for refraining from communicating on a third band from the first set of bands, the third band being associated with a secondary component carrier of a multi-carrier communications scheme, where refraining from communicating on the third band is based on determining that the first band and the second band share the set of radio frequency front-end resources and the third band being associated with the secondary component carrier. The transmission component  635  may be configured as or otherwise support a means for communicating on a remaining set of bands from the first set of bands and the second set of bands based on refraining from communicating on the third band. 
     In some examples, the band identification component  625  may be configured as or otherwise support a means for identifying a first set of bands associated with a first subscription. The band identification component  625  may be configured as or otherwise support a means for identifying a second set of bands associated with a second subscription different from the first subscription. The resource determination component  630  may be configured as or otherwise support a means for determining that a first band from the first set of bands and a second band from the second set of bands share a set of radio frequency front-end resources. The capability report component  640  may be configured as or otherwise support a means for transmitting, to a base station, a capability report excluding the first band and a third band from the first set of bands based on determining that the first band and the second band share the set of radio frequency front-end resources, the third band being associated with a secondary component carrier of a multi-carrier communications scheme. 
       FIG. 7  shows a block diagram  700  of a communications manager  720  that supports techniques for enhancing user equipment performance for multiple subscriber identification module operation in accordance with aspects of the present disclosure. The communications manager  720  may be an example of aspects of a communications manager  520 , a communications manager  620 , or both, as described herein. The communications manager  720 , or various components thereof, may be an example of means for performing various aspects of techniques for enhancing user equipment performance for multiple subscriber identification module operation as described herein. For example, the communications manager  720  may include a band identification component  725 , a resource determination component  730 , a transmission component  735 , a capability report component  740 , a component carrier manager  745 , a control signal manager  750 , a prioritization component  755 , a measurement report component  760 , a resource grant component  765 , or any combination thereof. Each of these components may communicate, directly or indirectly, with one another (e.g., via one or more buses). 
     The communications manager  720  may support wireless communication at a UE in accordance with examples as disclosed herein. The band identification component  725  may be configured as or otherwise support a means for identifying a first set of bands associated with a first subscription. In some examples, the band identification component  725  may be configured as or otherwise support a means for identifying a second set of bands associated with a second subscription different from the first subscription. The resource determination component  730  may be configured as or otherwise support a means for determining that a first band from the first set of bands and a second band from the second set of bands share a set of radio frequency front-end resources. The transmission component  735  may be configured as or otherwise support a means for refraining from communicating on a third band from the first set of bands, the third band being associated with a secondary component carrier of a multi-carrier communications scheme, where refraining from communicating on the third band is based on determining that the first band and the second band share the set of radio frequency front-end resources and the third band being associated with the secondary component carrier. In some examples, the transmission component  735  may be configured as or otherwise support a means for communicating on a remaining set of bands from the first set of bands and the second set of bands based on refraining from communicating on the third band. 
     In some examples, the component carrier manager  745  may be configured as or otherwise support a means for determining that the third band is configured as the secondary component carrier. In some examples, the component carrier manager  745  may be configured as or otherwise support a means for determining an absence of control signaling activating the third band associated with the secondary component carrier, where refraining from communicating on the third band includes dropping the third band based on the absence of the control signaling activating the third band associated with the secondary component carrier. 
     In some examples, the control signal manager  750  may be configured as or otherwise support a means for receiving, from a base station, control signaling activating the third band associated with the secondary component carrier. In some examples, the component carrier manager  745  may be configured as or otherwise support a means for determining that the third band associated with the secondary component carrier and is activated based on receiving the control signaling. 
     In some examples, to support refraining from communicating on the third band, the control signal manager  750  may be configured as or otherwise support a means for dropping the third band associated with the secondary component carrier based on determining that the first band from the first set of bands and the second band from the second set of bands share the set of radio frequency front-end resources and the third band being activated. 
     In some examples, to support refraining from communicating on the third band, the measurement report component  760  may be configured as or otherwise support a means for reporting a compensated measurement on the third band associated with the secondary component carrier based on determining that the first band from the first set of bands and the second band from the second set of bands share the set of radio frequency front-end resources and the third band being activated, where the third band is dropped based on the reported compensated measurement. 
     In some examples, the resource grant component  765  may be configured as or otherwise support a means for identifying a number of resource grants associated with the secondary component carrier based on the third band being activated, where the third band is dropped based on the identified number of resource grants associated with the secondary component carrier. 
     In some examples, the prioritization component  755  may be configured as or otherwise support a means for deprioritizing the third band from the first set of bands based on determining that the first band from the first set of bands and the second band from the second set of bands share the set of radio frequency front-end resources. 
     In some examples, to support deprioritizing the third band, the measurement report component  760  may be configured as or otherwise support a means for reporting a compensated measurement on the third band from the first set of bands based on determining that the first band from the first set of bands and the second band from the second set of bands share the set of radio frequency front-end resources. 
     In some examples, to support deprioritizing the third band, the measurement report component  760  may be configured as or otherwise support a means for refraining from reporting a measurement on the third band from the first set of bands based on determining that the first band from the first set of bands and the second band from the second set of bands share the set of radio frequency front-end resources. 
     In some examples, the transmission component  735  may be configured as or otherwise support a means for simultaneously communicating on the remaining set of bands for the first subscription and the second set of bands for the second subscription based at least in part on refraining from communicating on the third band associated with the secondary component carrier. 
     In some examples, to support determining that the first band from the first set of bands and the second band from the second set of bands share the set of radio frequency front-end resources, the resource determination component  730  may be configured as or otherwise support a means for determining that a combination of at least the first band, the second band, and the third band is associated with a full tune-away operation from the first subscription. 
     In some examples, the UE is configured to operate in a non-standalone mode of operation using the first set of bands. In some examples, the first subscription is associated with a multi-carrier operation and the second subscription is associated with a single-carrier operation. In some examples, a communication state for the first set of bands includes a dual-connectivity mode and a communication state for the second set of bands includes an idle mode. 
     Additionally or alternatively, the communications manager  720  may support wireless communication at a UE in accordance with examples as disclosed herein. In some examples, the band identification component  725  may be configured as or otherwise support a means for identifying a first set of bands associated with a first subscription. In some examples, the band identification component  725  may be configured as or otherwise support a means for identifying a second set of bands associated with a second subscription different from the first subscription. In some examples, the resource determination component  730  may be configured as or otherwise support a means for determining that a first band from the first set of bands and a second band from the second set of bands share a set of radio frequency front-end resources. The capability report component  740  may be configured as or otherwise support a means for transmitting, to a base station, a capability report excluding the first band and a third band from the first set of bands based on determining that the first band and the second band share the set of radio frequency front-end resources, the third band being associated with a secondary component carrier of a multi-carrier communications scheme. 
     In some examples, the band identification component  725  may be configured as or otherwise support a means for identifying a set of multiple combinations of bands from the first set of bands and the second set of bands for communicating with the base station, where a combination of the first band and the second band is included in the set of multiple combinations. 
     In some examples, to support transmitting the capability report, the capability report component  740  may be configured as or otherwise support a means for transmitting the capability report including a remaining number of combinations of the set of multiple combinations of bands from the first set of bands and the second set of bands. 
     In some examples, the transmission component  735  may be configured as or otherwise support a means for refraining from communicating on the third band based on transmitting the capability report excluding the first band and the third band. 
     In some examples, the UE is configured to operate in a non-standalone mode of operation. In some examples, the first subscription is associated with a multi-carrier operation and the second subscription is associated with a single-carrier operation. In some examples, a communication state for the first set of bands includes a dual-connectivity mode a communication state for the second set of bands includes an idle mode. 
       FIG. 8  shows a diagram of a system  800  including a device  805  that supports techniques for enhancing user equipment performance for multiple subscriber identification module operation in accordance with aspects of the present disclosure. The device  805  may be an example of or include the components of a device  505 , a device  605 , or a UE  115  as described herein. The device  805  may communicate wirelessly with one or more base stations  105 , UEs  115 , or any combination thereof. The device  805  may include components for bi-directional voice and data communications including components for transmitting and receiving communications, such as a communications manager  820 , an input/output (I/O) controller  810 , a transceiver  815 , an antenna  825 , a memory  830 , code  835 , and a processor  840 . These components may be in electronic communication or otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more buses (e.g., a bus  845 ). 
     The I/O controller  810  may manage input and output signals for the device  805 . The I/O controller  810  may also manage peripherals not integrated into the device  805 . In some cases, the I/O controller  810  may represent a physical connection or port to an external peripheral. In some cases, the I/O controller  810  may utilize an operating system such as iOS®, ANDROID®, MS-DOS®, MS-WINDOWS®, OS/2®, UNIX®, LINUX®, or another known operating system. Additionally or alternatively, the I/O controller  810  may represent or interact with a modem, a keyboard, a mouse, a touchscreen, or a similar device. In some cases, the I/O controller  810  may be implemented as part of a processor, such as the processor  840 . In some cases, a user may interact with the device  805  via the I/O controller  810  or via hardware components controlled by the I/O controller  810 . 
     In some cases, the device  805  may include a single antenna  825 . However, in some other cases, the device  805  may have more than one antenna  825 , which may be capable of concurrently transmitting or receiving multiple wireless transmissions. The transceiver  815  may communicate bi-directionally, via the one or more antennas  825 , wired, or wireless links as described herein. For example, the transceiver  815  may represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver. The transceiver  815  may also include a modem to modulate the packets, to provide the modulated packets to one or more antennas  825  for transmission, and to demodulate packets received from the one or more antennas  825 . The transceiver  815 , or the transceiver  815  and one or more antennas  825 , may be an example of a transmitter  515 , a transmitter  615 , a receiver  510 , a receiver  610 , or any combination thereof or component thereof, as described herein. 
     The memory  830  may include random access memory (RAM) and read-only memory (ROM). The memory  830  may store computer-readable, computer-executable code  835  including instructions that, when executed by the processor  840 , cause the device  805  to perform various functions described herein. The code  835  may be stored in a non-transitory computer-readable medium such as system memory or another type of memory. In some cases, the code  835  may not be directly executable by the processor  840  but may cause a computer (e.g., when compiled and executed) to perform functions described herein. In some cases, the memory  830  may contain, among other things, a basic I/O system (BIOS) which may control basic hardware or software operation such as the interaction with peripheral components or devices. 
     The processor  840  may include an intelligent hardware device (e.g., a general-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof). In some cases, the processor  840  may be configured to operate a memory array using a memory controller. In some other cases, a memory controller may be integrated into the processor  840 . The processor  840  may be configured to execute computer-readable instructions stored in a memory (e.g., the memory  830 ) to cause the device  805  to perform various functions (e.g., functions or tasks supporting techniques for enhancing user equipment performance for multiple subscriber identification module operation). For example, the device  805  or a component of the device  805  may include a processor  840  and memory  830  coupled to the processor  840 , the processor  840  and memory  830  configured to perform various functions described herein. 
     The communications manager  820  may support wireless communication at a UE in accordance with examples as disclosed herein. For example, the communications manager  820  may be configured as or otherwise support a means for identifying a first set of bands associated with a first subscription. The communications manager  820  may be configured as or otherwise support a means for identifying a second set of bands associated with a second subscription different from the first subscription. The communications manager  820  may be configured as or otherwise support a means for determining that a first band from the first set of bands and a second band from the second set of bands share a set of radio frequency front-end resources. The communications manager  820  may be configured as or otherwise support a means for refraining from communicating on a third band from the first set of bands, the third band being associated with a secondary component carrier of a multi-carrier communications scheme, where refraining from communicating on the third band is based on determining that the first band and the second band share the set of radio frequency front-end resources and the third band being associated with the secondary component carrier. The communications manager  820  may be configured as or otherwise support a means for communicating on a remaining set of bands from the first set of bands and the second set of bands based on refraining from communicating on the third band. 
     Additionally or alternatively, the communications manager  820  may support wireless communication at a UE in accordance with examples as disclosed herein. For example, the communications manager  820  may be configured as or otherwise support a means for identifying a first set of bands associated with a first subscription. The communications manager  820  may be configured as or otherwise support a means for identifying a second set of bands associated with a second subscription different from the first subscription. The communications manager  820  may be configured as or otherwise support a means for determining that a first band from the first set of bands and a second band from the second set of bands share a set of radio frequency front-end resources. The communications manager  820  may be configured as or otherwise support a means for transmitting, to a base station, a capability report excluding the first band and a third band from the first set of bands based on determining that the first band and the second band share the set of radio frequency front-end resources, the third band being associated with a secondary component carrier of a multi-carrier communications scheme. 
     By including or configuring the communications manager  820  in accordance with examples as described herein, the device  805  may support techniques for improved communication reliability, reduced latency, improved user experience related to reduced processing, reduced power consumption, more efficient utilization of communication resources, improved coordination between devices, longer battery life, improved utilization of processing capability. 
     In some examples, the communications manager  820  may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using or otherwise in cooperation with the transceiver  815 , the one or more antennas  825 , or any combination thereof. Although the communications manager  820  is illustrated as a separate component, in some examples, one or more functions described with reference to the communications manager  820  may be supported by or performed by the processor  840 , the memory  830 , the code  835 , or any combination thereof. For example, the code  835  may include instructions executable by the processor  840  to cause the device  805  to perform various aspects of techniques for enhancing user equipment performance for multiple subscriber identification module operation as described herein, or the processor  840  and the memory  830  may be otherwise configured to perform or support such operations. 
       FIG. 9  shows a flowchart illustrating a method  900  that supports techniques for enhancing user equipment performance for multiple subscriber identification module operation in accordance with aspects of the present disclosure. The operations of the method  900  may be implemented by a UE or its components as described herein. For example, the operations of the method  900  may be performed by a UE  115  as described with reference to  FIGS. 1 through 8 . In some examples, a UE may execute a set of instructions to control the functional elements of the UE to perform the described functions. Additionally or alternatively, the UE may perform aspects of the described functions using special-purpose hardware. 
     At  905 , the method may include identifying a first set of bands associated with a first subscription. The operations of  905  may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of  905  may be performed by a band identification component  725  as described with reference to  FIG. 7 . 
     At  910 , the method may include identifying a second set of bands associated with a second subscription different from the first subscription. The operations of  910  may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of  910  may be performed by a band identification component  725  as described with reference to  FIG. 7 . 
     At  915 , the method may include determining that a first band from the first set of bands and a second band from the second set of bands share a set of radio frequency front-end resources. The operations of  915  may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of  915  may be performed by a resource determination component  730  as described with reference to  FIG. 7 . 
     At  920 , the method may include refraining from communicating on a third band from the first set of bands, the third band being associated with a secondary component carrier of a multi-carrier communications scheme, where refraining from communicating on the third band is based on determining that the first band and the second band share the set of radio frequency front-end resources and the third band being associated with the secondary component carrier. The operations of  920  may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of  920  may be performed by a transmission component  735  as described with reference to  FIG. 7 . 
     At  925 , the method may include communicating on a remaining set of bands from the first set of bands and the second set of bands based at least in part on refraining from communicating on the third band. The operations of  925  may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of  925  may be performed by a transmission component  735  as described with reference to  FIG. 7 . 
       FIG. 10  shows a flowchart illustrating a method  1000  that supports techniques for enhancing user equipment performance for multiple subscriber identification module operation in accordance with aspects of the present disclosure. The operations of the method  1000  may be implemented by a UE or its components as described herein. For example, the operations of the method  1000  may be performed by a UE  115  as described with reference to  FIGS. 1 through 8 . In some examples, a UE may execute a set of instructions to control the functional elements of the UE to perform the described functions. Additionally or alternatively, the UE may perform aspects of the described functions using special-purpose hardware. 
     At  1005 , the method may include identifying a first set of bands associated with a first subscription. The operations of  1005  may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of  1005  may be performed by a band identification component  725  as described with reference to  FIG. 7 . 
     At  1010 , the method may include identifying a second set of bands associated with a second subscription different from the first subscription. The operations of  1010  may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of  1010  may be performed by a band identification component  725  as described with reference to  FIG. 7 . 
     At  1015 , the method may include determining that a first band from the first set of bands and a second band from the second set of bands share a set of radio frequency front-end resources. The operations of  1015  may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of  1015  may be performed by a resource determination component  730  as described with reference to  FIG. 7 . 
     At  1020 , the method may include determining that a third band from the first set of bands is configured as a secondary component carrier of a multi-carrier communications scheme. The operations of  1020  may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of  1020  may be performed by a component carrier manager  745  as described with reference to  FIG. 7 . 
     At  1025 , the method may include determining an absence of control signaling activating the third band associated with the secondary component carrier. The operations of  1025  may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of  1025  may be performed by a component carrier manager  745  as described with reference to  FIG. 7 . 
     At  1030 , the method may include refraining from communicating on the third band from the first set of bands based on determining that the first band and the second band share the set of radio frequency front-end resources and the third band being associated with the secondary component carrier, where refraining from communicating on the third band includes dropping the third band based on the absence of the control signaling activating the third band associated with the secondary component carrier. The operations of  1030  may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of  1030  may be performed by a transmission component  735  as described with reference to  FIG. 7 . 
     At  1035 , the method may include communicating on a remaining set of bands from the first set of bands and the second set of bands based at least in part on refraining from communicating on the third band. The operations of  1035  may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of  1035  may be performed by a transmission component  735  as described with reference to  FIG. 7 . 
       FIG. 11  shows a flowchart illustrating a method  1100  that supports techniques for enhancing user equipment performance for multiple subscriber identification module operation in accordance with aspects of the present disclosure. The operations of the method  1100  may be implemented by a UE or its components as described herein. For example, the operations of the method  1100  may be performed by a UE  115  as described with reference to  FIGS. 1 through 8 . In some examples, a UE may execute a set of instructions to control the functional elements of the UE to perform the described functions. Additionally or alternatively, the UE may perform aspects of the described functions using special-purpose hardware. 
     At  1105 , the method may include identifying a first set of bands associated with a first subscription. The operations of  1105  may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of  1105  may be performed by a band identification component  725  as described with reference to  FIG. 7 . 
     At  1110 , the method may include identifying a second set of bands associated with a second subscription different from the first subscription. The operations of  1110  may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of  1110  may be performed by a band identification component  725  as described with reference to  FIG. 7 . 
     At  1115 , the method may include determining that a first band from the first set of bands and a second band from the second set of bands share a set of radio frequency front-end resources. The operations of  1115  may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of  1115  may be performed by a resource determination component  730  as described with reference to  FIG. 7 . 
     At  1120 , the method may include deprioritizing a third band from the first set of bands based on determining that the first band from the first set of bands and the second band from the second set of bands share the set of radio frequency front-end resources. The operations of  1120  may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of  1120  may be performed by a prioritization component  755  as described with reference to  FIG. 7 . 
     At  1125 , the method may include refraining from communicating on the third band from the first set of bands, the third band being associated with a secondary component carrier of a multi-carrier communications scheme, where refraining from communicating on the third band is based on determining that the first band and the second band share the set of radio frequency front-end resources and the third band being associated with the secondary component carrier. The operations of  1125  may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of  1125  may be performed by a transmission component  735  as described with reference to  FIG. 7 . 
     At  1130 , the method may include communicating on a remaining set of bands from the first set of bands and the second set of bands based at least in part on refraining from communicating on the third band. The operations of  1130  may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of  1130  may be performed by a transmission component  735  as described with reference to  FIG. 7 . 
       FIG. 12  shows a flowchart illustrating a method  1200  that supports techniques for enhancing user equipment performance for multiple subscriber identification module operation in accordance with aspects of the present disclosure. The operations of the method  1200  may be implemented by a UE or its components as described herein. For example, the operations of the method  1200  may be performed by a UE  115  as described with reference to  FIGS. 1 through 8 . In some examples, a UE may execute a set of instructions to control the functional elements of the UE to perform the described functions. Additionally or alternatively, the UE may perform aspects of the described functions using special-purpose hardware. 
     At  1205 , the method may include identifying a first set of bands associated with a first subscription. The operations of  1205  may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of  1205  may be performed by a band identification component  725  as described with reference to  FIG. 7 . 
     At  1210 , the method may include identifying a second set of bands associated with a second subscription different from the first subscription. The operations of  1210  may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of  1210  may be performed by a band identification component  725  as described with reference to  FIG. 7 . 
     At  1215 , the method may include determining that a first band from the first set of bands and a second band from the second set of bands share a set of radio frequency front-end resources. The operations of  1215  may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of  1215  may be performed by a resource determination component  730  as described with reference to  FIG. 7 . 
     At  1220 , the method may include transmitting, to a base station, a capability report excluding the first band and a third band from the first set of bands based on determining that the first band and the second band share the set of radio frequency front-end resources, the third band being associated with a secondary component carrier of a multi-carrier communications scheme. The operations of  1220  may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of  1220  may be performed by a capability report component  740  as described with reference to  FIG. 7 . 
       FIG. 13  shows a flowchart illustrating a method  1300  that supports techniques for enhancing user equipment performance for multiple subscriber identification module operation in accordance with aspects of the present disclosure. The operations of the method  1300  may be implemented by a UE or its components as described herein. For example, the operations of the method  1300  may be performed by a UE  115  as described with reference to  FIGS. 1 through 8 . In some examples, a UE may execute a set of instructions to control the functional elements of the UE to perform the described functions. Additionally or alternatively, the UE may perform aspects of the described functions using special-purpose hardware. 
     At  1305 , the method may include identifying a first set of bands associated with a first subscription. The operations of  1305  may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of  1305  may be performed by a band identification component  725  as described with reference to  FIG. 7 . 
     At  1310 , the method may include identifying a second set of bands associated with a second subscription different from the first subscription. The operations of  1310  may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of  1310  may be performed by a band identification component  725  as described with reference to  FIG. 7 . 
     At  1315 , the method may include identifying a set of multiple combinations of bands from the first set of bands and the second set of bands for communicating with the base station, where a combination of the first band and the second band is included in the set of multiple combinations. The operations of  1315  may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of  1315  may be performed by a band identification component  725  as described with reference to  FIG. 7 . 
     At  1320 , the method may include determining that a first band from the first set of bands and a second band from the second set of bands share a set of radio frequency front-end resources. The operations of  1320  may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of  1320  may be performed by a resource determination component  730  as described with reference to  FIG. 7 . 
     At  1325 , the method may include transmitting, to a base station and based on determining that the first band and the second band share the set of radio frequency front-end resources, a capability report excluding the first band and a third band from the first set of bands and including a remaining number of combinations of the set of multiple combinations of bands from the first set of bands and the second set of bands. The operations of  1325  may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of  1325  may be performed by a capability report component  740  as described with reference to  FIG. 7 . 
     The following provides an overview of aspects of the present disclosure: 
     Aspect 1: A method for wireless communication at a UE, comprising: identifying a first set of bands associated with a first subscription; identifying a second set of bands associated with a second subscription different from the first subscription; determining that a first band from the first set of bands and a second band from the second set of bands share a set of radio frequency front-end resources; refraining from communicating on a third band from the first set of bands, the third band being associated with a secondary component carrier of a multi-carrier communications scheme, wherein refraining from communicating on the third band is based at least in part on determining that the first band and the second band share the set of radio frequency front-end resources and the third band being associated with the secondary component carrier; and communicating on a remaining set of bands from the first set of bands and the second set of bands based at least in part on refraining from communicating on the third band. 
     Aspect 2: The method of aspect 1, further comprising: determining that the third band is configured as the secondary component carrier; and determining an absence of control signaling activating the third band associated with the secondary component carrier, wherein refraining from communicating on the third band comprises dropping the third band based at least in part on the absence of the control signaling activating the third band associated with the secondary component carrier. 
     Aspect 3: The method of any of aspects 1 through 2, further comprising: receiving, from a base station, control signaling activating the third band associated with the secondary component carrier; and determining that the third band associated with the secondary component carrier and is activated based at least in part on receiving the control signaling. 
     Aspect 4: The method of aspect 3, wherein refraining from communicating on the third band comprises: dropping the third band associated with the secondary component carrier based at least in part on determining that the first band from the first set of bands and the second band from the second set of bands shares the set of radio frequency front-end resources and the third band being activated. 
     Aspect 5: The method of aspect 4, wherein refraining from communicating on the third band comprises: reporting a compensated measurement on the third band associated with the secondary component carrier based at least in part on determining that the first band from the first set of bands and the second band from the second set of bands share the set of radio frequency front-end resources and the third band being activated, wherein the third band is dropped based at least in part on the reported compensated measurement. 
     Aspect 6: The method of any of aspects 4 through 5, further comprising: identifying a number of resource grants associated with the secondary component carrier based at least in part on the third band being activated, wherein the third band is dropped based at least in part on the identified number of resource grants associated with the secondary component carrier. 
     Aspect 7: The method of any of aspects 1 through 6, further comprising: deprioritizing the third band from the first set of bands based at least in part on determining that the first band from the first set of bands and the second band from the second set of bands shares the set of radio frequency front-end resources. 
     Aspect 8: The method of aspect 7, wherein deprioritizing the third band comprises: reporting a compensated measurement on the third band from the first set of bands based at least in part on determining that the first band from the first set of bands and the second band from the second set of bands share the set of radio frequency front-end resources. 
     Aspect 9: The method of any of aspects 7 through 8, wherein deprioritizing the third band comprises: refraining from reporting a measurement on the third band from the first set of bands based at least in part on determining that the first band from the first set of bands and the second band from the second set of bands share the set of radio frequency front-end resources. 
     Aspect 10: The method of any of aspects 1 through 9, wherein communicating on the remaining set of bands from the first set of bands comprises: simultaneously communicating on the remaining set of bands for the first subscription and the second set of bands for the second subscription based at least in part on refraining from communicating on the third band associated with the secondary component carrier. 
     Aspect 11: The method of any of aspects 1 through 10, wherein determining that the first band from the first set of bands and the second band from the second set of bands share the set of radio frequency front-end resources comprises: determining that a combination of at least the first band, the second band, and the third band is associated with a full tune-away operation from the first subscription. 
     Aspect 12: The method of any of aspects 1 through 11, wherein the UE is configured to operate in a non-standalone mode of operation using the first set of bands. 
     Aspect 13: The method of any of aspects 1 through 12, wherein the first subscription is associated with a multi-carrier operation and the second subscription is associated with a single-carrier operation. 
     Aspect 14: The method of any of aspects 1 through 13, wherein a communication state for the first set of bands comprises a dual-connectivity mode and a communication state for the second set of bands comprises an idle mode. 
     Aspect 15: A method for wireless communication at a UE, comprising: identifying a first set of bands associated with a first subscription; identifying a second set of bands associated with a second subscription different from the first subscription; determining that a first band from the first set of bands and a second band from the second set of bands share a set of radio frequency front-end resources; and transmitting, to a base station, a capability report excluding the first band and a third band from the first set of bands based at least in part on determining that the first band and the second band shares the set of radio frequency front-end resources, the third band being associated with a secondary component carrier of a multi-carrier communications scheme. 
     Aspect 16: The method of aspect 15, further comprising: identifying a plurality of combinations of bands from the first set of bands and the second set of bands for communicating with the base station, wherein a combination of the first band and the second band is included in the plurality of combinations. 
     Aspect 17: The method of aspect 16, wherein transmitting the capability report comprises: transmitting the capability report including a remaining number of combinations of the plurality of combinations of bands from the first set of bands and the second set of bands. 
     Aspect 18: The method of any of aspects 15 through 17, further comprising: refraining from communicating on the third band based at least in part on transmitting the capability report excluding the first band and the third band. 
     Aspect 19: The method of any of aspects 15 through 18, wherein the UE is configured to operate in a non-standalone mode of operation. 
     Aspect 20: The method of any of aspects 15 through 19, wherein the first subscription is associated with a multi-carrier operation and the second subscription is associated with a single-carrier operation. 
     Aspect 21: The method of any of aspects 15 through 20, wherein a communication state for the first set of bands comprises a dual-connectivity mode a communication state for the second set of bands comprises an idle mode. 
     Aspect 22: An apparatus for wireless communication at a UE, comprising a processor; memory coupled with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform a method of any of aspects 1 through 14. 
     Aspect 23: An apparatus for wireless communication at a UE, comprising at least one means for performing a method of any of aspects 1 through 14. 
     Aspect 24: A non-transitory computer-readable medium storing code for wireless communication at a UE, the code comprising instructions executable by a processor to perform a method of any of aspects 1 through 14. 
     Aspect 25: An apparatus for wireless communication at a UE, comprising a processor; memory coupled with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform a method of any of aspects 15 through 21. 
     Aspect 26: An apparatus for wireless communication at a UE, comprising at least one means for performing a method of any of aspects 15 through 21. 
     Aspect 27: A non-transitory computer-readable medium storing code for wireless communication at a UE, the code comprising instructions executable by a processor to perform a method of any of aspects 15 through 21. 
     It should be noted that the methods described herein describe possible implementations, and that the operations and the steps may be rearranged or otherwise modified and that other implementations are possible. Further, aspects from two or more of the methods may be combined. 
     Although aspects of an LTE, LTE-A, LTE-A Pro, or NR system may be described for purposes of example, and LTE, LTE-A, LTE-A Pro, or NR terminology may be used in much of the description, the techniques described herein are applicable beyond LTE, LTE-A, LTE-A Pro, or NR networks. For example, the described techniques may be applicable to various other wireless communications systems such as Ultra Mobile Broadband (UMB), Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM, as well as other systems and radio technologies not explicitly mentioned herein. 
     Information and signals described herein may be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof. 
     The various illustrative blocks and components described in connection with the disclosure herein may be implemented or performed with a general-purpose processor, a DSP, an ASIC, a CPU, an FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general-purpose processor may be a microprocessor, but in the alternative, the processor may be any processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration). 
     The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Other examples and implementations are within the scope of the disclosure and appended claims. For example, due to the nature of software, functions described herein may be implemented using software executed by a processor, hardware, firmware, hardwiring, or combinations of any of these. Features implementing functions may also be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations. 
     Computer-readable media includes both non-transitory computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A non-transitory storage medium may be any available medium that may be accessed by a general-purpose or special-purpose computer. By way of example, and not limitation, non-transitory computer-readable media may include RAM, ROM, electrically erasable programmable ROM (EEPROM), flash memory, compact disk (CD) ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other non-transitory medium that may be used to carry or store desired program code means in the form of instructions or data structures and that may be accessed by a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor. Also, any connection is properly termed a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of computer-readable medium. Disk and disc, as used herein, include CD, laser disc, optical disc, digital versatile disc (DVD), floppy disk and Blu-ray disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above are also included within the scope of computer-readable media. 
     As used herein, including in the claims, “or” as used in a list of items (e.g., a list of items prefaced by a phrase such as “at least one of” or “one or more of”) indicates an inclusive list such that, for example, a list of at least one of A, B, or C means A or B or C or AB or AC or BC or ABC (i.e., A and B and C). Also, as used herein, the phrase “based on” shall not be construed as a reference to a closed set of conditions. For example, an example step that is described as “based on condition A” may be based on both a condition A and a condition B without departing from the scope of the present disclosure. In other words, as used herein, the phrase “based on” shall be construed in the same manner as the phrase “based at least in part on.” 
     In the appended figures, similar components or features may have the same reference label. Further, various components of the same type may be distinguished by following the reference label by a dash and a second label that distinguishes among the similar components. If just the first reference label is used in the specification, the description is applicable to any one of the similar components having the same first reference label irrespective of the second reference label, or other subsequent reference label. 
     The description set forth herein, in connection with the appended drawings, describes example configurations and does not represent all the examples that may be implemented or that are within the scope of the claims. The term “example” used herein means “serving as an example, instance, or illustration,” and not “preferred” or “advantageous over other examples.” The detailed description includes specific details for the purpose of providing an understanding of the described techniques. These techniques, however, may be practiced without these specific details. In some instances, known structures and devices are shown in block diagram form in order to avoid obscuring the concepts of the described examples. 
     The description herein is provided to enable a person having ordinary skill in the art to make or use the disclosure. Various modifications to the disclosure will be apparent to a person having ordinary skill in the art, and the generic principles defined herein may be applied to other variations without departing from the scope of the disclosure. Thus, the disclosure is not limited to the examples and designs described herein but is to be accorded the broadest scope consistent with the principles and novel features disclosed herein.