Patent ID: 12200613

DETAILED DESCRIPTION

Various aspects of the disclosure are described more fully hereinafter with reference to the accompanying drawings. This disclosure may, however, be embodied in many different forms and should not be construed as limited to any specific structure or function presented throughout this disclosure. Rather, these aspects are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. One skilled in the art should appreciate that the scope of the disclosure is intended to cover any aspect of the disclosure disclosed herein, whether implemented independently of or combined with any other aspect of the disclosure. For example, an apparatus may be implemented or a method may be practiced using any number of the aspects set forth herein. In addition, the scope of the disclosure is intended to cover such an apparatus or method which is practiced using other structure, functionality, or structure and functionality in addition to or other than the various aspects of the disclosure set forth herein. It should be understood that any aspect of the disclosure disclosed herein may be embodied by one or more elements of a claim.

Several aspects of telecommunication systems will now be presented with reference to various apparatuses and techniques. These apparatuses and techniques will be described in the following detailed description and illustrated in the accompanying drawings by various blocks, modules, components, circuits, steps, processes, algorithms, or the like (collectively referred to as “elements”). These elements may be implemented using hardware, software, or combinations thereof. Whether such elements are implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system.

While aspects may be described herein using terminology commonly associated with a 5G or New Radio (NR) radio access technology (RAT), aspects of the present disclosure can be applied to other RATs, such as a 3G RAT, a 4G RAT, and/or a RAT subsequent to 5G (e.g., 6G).

FIG.1is a diagram illustrating an example of a wireless network100, in accordance with the present disclosure. The wireless network100may be or may include elements of a 5G (e.g., NR) network and/or a 4G (e.g., Long Term Evolution (LTE)) network, among other examples. The wireless network100may include one or more base stations110(shown as a BS110a, a BS110b, a BS110c, and a BS110d), a user equipment (UE)120or multiple UEs120(shown as a UE120a, a UE120b, a UE120c, a UE120d, and a UE120e), and/or other network entities. A base station110is an entity that communicates with UEs120. A base station110(sometimes referred to as a BS) may include, for example, an NR base station, an LTE base station, a Node B, an eNB (e.g., in 4G), a gNB (e.g., in 5G), an access point, and/or a transmission reception point (TRP). Each base station110may provide communication coverage for a particular geographic area. In the Third Generation Partnership Project (3GPP), the term “cell” can refer to a coverage area of a base station110and/or a base station subsystem serving this coverage area, depending on the context in which the term is used.

A base station110may provide communication coverage for a macro cell, a pico cell, a femto cell, and/or another type of cell. A macro cell may cover a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by UEs120with service subscriptions. A pico cell may cover a relatively small geographic area and may allow unrestricted access by UEs120with service subscription. A femto cell may cover a relatively small geographic area (e.g., a home) and may allow restricted access by UEs120having association with the femto cell (e.g., UEs120in a closed subscriber group (CSG)). A base station110for a macro cell may be referred to as a macro base station. A base station110for a pico cell may be referred to as a pico base station. A base station110for a femto cell may be referred to as a femto base station or an in-home base station. In the example shown inFIG.1, the BS110amay be a macro base station for a macro cell102a, the BS110bmay be a pico base station for a pico cell102b, and the BS110cmay be a femto base station for a femto cell102c. A base station may support one or multiple (e.g., three) cells.

In some aspects, the term “base station” (e.g., the base station110) or “network entity” may refer to an aggregated base station, a disaggregated base station, an integrated access and backhaul (IAB) node, a relay node, and/or one or more components thereof. For example, in some aspects, “base station” or “network entity” may refer to a central unit (CU), a distributed unit (DU), a radio unit (RU), a Near-Real Time (Near-RT) RAN Intelligent Controller (RIC), or a Non-Real Time (Non-RT) RIC, or a combination thereof. In some aspects, the term “base station” or “network entity” may refer to one device configured to perform one or more functions, such as those described herein in connection with the base station110. In some aspects, the term “base station” or “network entity” may refer to a plurality of devices configured to perform the one or more functions. For example, in some distributed systems, each of a number of different devices (which may be located in the same geographic location or in different geographic locations) may be configured to perform at least a portion of a function, or to duplicate performance of at least a portion of the function, and the term “base station” or “network entity” may refer to any one or more of those different devices. In some aspects, the term “base station” or “network entity” may refer to one or more virtual base stations and/or one or more virtual base station functions. For example, in some aspects, two or more base station functions may be instantiated on a single device. In some aspects, the term “base station” or “network entity” may refer to one of the base station functions and not another. In this way, a single device may include more than one base station.

In some examples, a cell may not necessarily be stationary, and the geographic area of the cell may move according to the location of a base station110that is mobile (e.g., a mobile base station). In some examples, the base stations110may be interconnected to one another and/or to one or more other base stations110or network nodes (not shown) in the wireless network100through various types of backhaul interfaces, such as a direct physical connection or a virtual network, using any suitable transport network.

The wireless network100may include one or more relay stations. A relay station is an entity that can receive a transmission of data from an upstream station (e.g., a base station110or a UE120) and send a transmission of the data to a downstream station (e.g., a UE120or a base station110). A relay station may be a UE120that can relay transmissions for other UEs120. In the example shown inFIG.1, the BS110d(e.g., a relay base station) may communicate with the BS110a(e.g., a macro base station) and the UE120din order to facilitate communication between the BS110aand the UE120d. A base station110that relays communications may be referred to as a relay station, a relay base station, a relay, or the like.

The wireless network100may be a heterogeneous network that includes base stations110of different types, such as macro base stations, pico base stations, femto base stations, relay base stations, or the like. These different types of base stations110may have different transmit power levels, different coverage areas, and/or different impacts on interference in the wireless network100. For example, macro base stations may have a high transmit power level (e.g., 5 to 40 watts) whereas pico base stations, femto base stations, and relay base stations may have lower transmit power levels (e.g., 0.1 to 2 watts).

A network controller130may couple to or communicate with a set of base stations110and may provide coordination and control for these base stations110. The network controller130may communicate with the base stations110via a backhaul communication link. The base stations110may communicate with one another directly or indirectly via a wireless or wireline backhaul communication link.

The UEs120may be dispersed throughout the wireless network100, and each UE120may be stationary or mobile. A UE120may include, for example, an access terminal, a terminal, a mobile station, and/or a subscriber unit. A UE120may be a cellular phone (e.g., a smart phone), a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device, a biometric device, a wearable device (e.g., a smart watch, smart clothing, smart glasses, a smart wristband, smart jewelry (e.g., a smart ring or a smart bracelet)), an entertainment device (e.g., a music device, a video device, and/or a satellite radio), a vehicular component or sensor, a smart meter/sensor, industrial manufacturing equipment, a global positioning system device, and/or any other suitable device that is configured to communicate via a wireless medium.

Some UEs120may be considered machine-type communication (MTC) or evolved or enhanced machine-type communication (eMTC) UEs. An MTC UE and/or an eMTC UE may include, for example, a robot, a drone, a remote device, a sensor, a meter, a monitor, and/or a location tag, that may communicate with a base station, another device (e.g., a remote device), or some other entity. Some UEs120may be considered Internet-of-Things (IoT) devices, and/or may be implemented as NB-IoT (narrowband IoT) devices. Some UEs120may be considered a Customer Premises Equipment. A UE120may be included inside a housing that houses components of the UE120, such as processor components and/or memory components. In some examples, the processor components and the memory components may be coupled together. For example, the processor components (e.g., one or more processors) and the memory components (e.g., a memory) may be operatively coupled, communicatively coupled, electronically coupled, and/or electrically coupled.

In general, any number of wireless networks100may be deployed in a given geographic area. Each wireless network100may support a particular RAT and may operate on one or more frequencies. A RAT may be referred to as a radio technology, an air interface, or the like. A frequency may be referred to as a carrier, a frequency channel, or the like. Each frequency may support a single RAT in a given geographic area in order to avoid interference between wireless networks of different RATs. In some cases, NR or 5G RAT networks may be deployed.

In some examples, two or more UEs120(e.g., shown as UE120aand UE120e) may communicate directly using one or more sidelink channels (e.g., without using a base station110as an intermediary to communicate with one another). For example, the UEs120may communicate using peer-to-peer (P2P) communications, device-to-device (D2D) communications, a vehicle-to-everything (V2X) protocol (e.g., which may include a vehicle-to-vehicle (V2V) protocol, a vehicle-to-infrastructure (V2I) protocol, or a vehicle-to-pedestrian (V2P) protocol), and/or a mesh network. In such examples, a UE120may perform scheduling operations, resource selection operations, and/or other operations described elsewhere herein as being performed by the base station110.

In some cases, a UE120may be a multi-subscriber identity module (SIM) UE. For example, the UE120may communicate with a first base station110ausing a first SIM. The UE120may communicate with a second base station110busing a second SIM. Each SIM may be associated with a subscription. A subscription may be a subscription with a network operator (for example, a mobile network operator (MNO)) that enables the UE120to access a wireless network (for example, a radio access network (RAN)) associated with the network operator.

Devices of the wireless network100may communicate using the electromagnetic spectrum, which may be subdivided by frequency or wavelength into various classes, bands, channels, or the like. For example, devices of the wireless network100may communicate using one or more operating bands. In 5G NR, two initial operating bands have been identified as frequency range designations FR1 (410 MHz-7.125 GHz) and FR2 (24.25 GHz-52.6 GHz). It should be understood that although a portion of FR1 is greater than 6 GHz, FR1 is often referred to (interchangeably) as a “Sub-6 GHz” band in various documents and articles. A similar nomenclature issue sometimes occurs with regard to FR2, which is often referred to (interchangeably) as a “millimeter wave” band in documents and articles, despite being different from the extremely high frequency (EHF) band (30 GHz-300 GHz) which is identified by the International Telecommunications Union (ITU) as a “millimeter wave” band.

The frequencies between FR1 and FR2 are often referred to as mid-band frequencies. Recent 5G NR studies have identified an operating band for these mid-band frequencies as frequency range designation FR3 (7.125 GHz-24.25 GHz). Frequency bands falling within FR3 may inherit FR1 characteristics and/or FR2 characteristics, and thus may effectively extend features of FR1 and/or FR2 into mid-band frequencies. In addition, higher frequency bands are currently being explored to extend 5G NR operation beyond 52.6 GHz. For example, three higher operating bands have been identified as frequency range designations FR4a or FR4-1 (52.6 GHz-71 GHz), FR4 (52.6 GHz-114.25 GHz), and FR5 (114.25 GHz-300 GHz). Each of these higher frequency bands falls within the EHF band.

With the above examples in mind, unless specifically stated otherwise, it should be understood that the term “sub-6 GHz” or the like, if used herein, may broadly represent frequencies that may be less than 6 GHz, may be within FR1, or may include mid-band frequencies. Further, unless specifically stated otherwise, it should be understood that the term “millimeter wave” or the like, if used herein, may broadly represent frequencies that may include mid-band frequencies, may be within FR2, FR4, FR4-a or FR4-1, and/or FR5, or may be within the EHF band. It is contemplated that the frequencies included in these operating bands (e.g., FR1, FR2, FR3, FR4, FR4-a, FR4-1, and/or FR5) may be modified, and techniques described herein are applicable to those modified frequency ranges.

In some aspects, the UE120may include a communication manager140. As described in more detail elsewhere herein, the communication manager140may detect that a first subscription, of a plurality of subscriptions associated with the UE120, is associated with an active service on a first cellular network, and search, for a second subscription of the plurality of subscriptions, for RATs and frequency bands that are compatible with a dual active mode of the UE120. Additionally, or alternatively, the communication manager140may perform one or more other operations described herein.

In some aspects, the base station110may include a communication manager150. The communication manager150may perform one or more operations described herein.

As indicated above,FIG.1is provided as an example. Other examples may differ from what is described with regard toFIG.1.

FIG.2is a diagram illustrating an example200of a base station110in communication with a UE120in a wireless network100, in accordance with the present disclosure. The base station110may be equipped with a set of antennas234athrough234t, such as T antennas (T≥1). The UE120may be equipped with a set of antennas252athrough252r, such as R antennas (R≥1).

At the base station110, a transmit processor220may receive data, from a data source212, intended for the UE120(or a set of UEs120). The transmit processor220may select one or more modulation and coding schemes (MCSs) for the UE120based at least in part on one or more channel quality indicators (CQIs) received from that UE120. The base station110may process (e.g., encode and modulate) the data for the UE120based at least in part on the MCS(s) selected for the UE120and may provide data symbols for the UE120. The transmit processor220may process system information (e.g., for semi-static resource partitioning information (SRPI)) and control information (e.g., CQI requests, grants, and/or upper layer signaling) and provide overhead symbols and control symbols. The transmit processor220may generate reference symbols for reference signals (e.g., a cell-specific reference signal (CRS) or a demodulation reference signal (DMRS)) and synchronization signals (e.g., a primary synchronization signal (PSS) or a secondary synchronization signal (SSS)). A transmit (TX) multiple-input multiple-output (MIMO) processor230may perform spatial processing (e.g., precoding) on the data symbols, the control symbols, the overhead symbols, and/or the reference symbols, if applicable, and may provide a set of output symbol streams (e.g., T output symbol streams) to a corresponding set of modems232(e.g., T modems), shown as modems232athrough232t. For example, each output symbol stream may be provided to a modulator component (shown as MOD) of a modem232. Each modem232may use a respective modulator component to process a respective output symbol stream (e.g., for OFDM) to obtain an output sample stream. Each modem232may further use a respective modulator component to process (e.g., convert to analog, amplify, filter, and/or upconvert) the output sample stream to obtain a downlink signal. The modems232athrough232tmay transmit a set of downlink signals (e.g., T downlink signals) via a corresponding set of antennas234(e.g., T antennas), shown as antennas234athrough234t.

At the UE120, a set of antennas252(shown as antennas252athrough252r) may receive the downlink signals from the base station110and/or other base stations110and may provide a set of received signals (e.g., R received signals) to a set of modems254(e.g., R modems), shown as modems254athrough254r. For example, each received signal may be provided to a demodulator component (shown as DEMOD) of a modem254. Each modem254may use a respective demodulator component to condition (e.g., filter, amplify, downconvert, and/or digitize) a received signal to obtain input samples. Each modem254may use a demodulator component to further process the input samples (e.g., for OFDM) to obtain received symbols. A MIMO detector256may obtain received symbols from the modems254, may perform MIMO detection on the received symbols if applicable, and may provide detected symbols. A receive processor258may process (e.g., demodulate and decode) the detected symbols, may provide decoded data for the UE120to a data sink260, and may provide decoded control information and system information to a controller/processor280. The term “controller/processor” may refer to one or more controllers, one or more processors, or a combination thereof. A channel processor may determine a reference signal received power (RSRP) parameter, a received signal strength indicator (RSSI) parameter, a reference signal received quality (RSRQ) parameter, and/or a CQI parameter, among other examples. In some examples, one or more components of the UE120may be included in a housing284.

The network controller130may include a communication unit294, a controller/processor290, and a memory292. The network controller130may include, for example, one or more devices in a core network. The network controller130may communicate with the base station110via the communication unit294.

One or more antennas (e.g., antennas234athrough234tand/or antennas252athrough252r) may include, or may be included within, one or more antenna panels, one or more antenna groups, one or more sets of antenna elements, and/or one or more antenna arrays, among other examples. An antenna panel, an antenna group, a set of antenna elements, and/or an antenna array may include one or more antenna elements (within a single housing or multiple housings), a set of coplanar antenna elements, a set of non-coplanar antenna elements, and/or one or more antenna elements coupled to one or more transmission and/or reception components, such as one or more components ofFIG.2.

On the uplink, at the UE120, a transmit processor264may receive and process data from a data source262and control information (e.g., for reports that include RSRP, RSSI, RSRQ, and/or CQI) from the controller/processor280. The transmit processor264may generate reference symbols for one or more reference signals. The symbols from the transmit processor264may be precoded by a TX MIMO processor266if applicable, further processed by the modems254(e.g., for DFT-s-OFDM or CP-OFDM), and transmitted to the base station110. In some examples, the modem254of the UE120may include a modulator and a demodulator. In some examples, the UE120includes a transceiver. The transceiver may include any combination of the antenna(s)252, the modem(s)254, the MIMO detector256, the receive processor258, the transmit processor264, and/or the TX MIMO processor266. The transceiver may be used by a processor (e.g., the controller/processor280) and the memory282to perform aspects of any of the methods described herein (e.g., with reference toFIGS.4-8).

At the base station110, the uplink signals from UE120and/or other UEs may be received by the antennas234, processed by the modem232(e.g., a demodulator component, shown as DEMOD, of the modem232), detected by a MIMO detector236if applicable, and further processed by a receive processor238to obtain decoded data and control information sent by the UE120. The receive processor238may provide the decoded data to a data sink239and provide the decoded control information to the controller/processor240. The base station110may include a communication unit244and may communicate with the network controller130via the communication unit244. The base station110may include a scheduler246to schedule one or more UEs120for downlink and/or uplink communications. In some examples, the modem232of the base station110may include a modulator and a demodulator. In some examples, the base station110includes a transceiver. The transceiver may include any combination of the antenna(s)234, the modem(s)232, the MIMO detector236, the receive processor238, the transmit processor220, and/or the TX MIMO processor230. The transceiver may be used by a processor (e.g., the controller/processor240) and the memory242to perform aspects of any of the methods described herein (e.g., with reference toFIGS.4-8).

The controller/processor240of the base station110, the controller/processor280of the UE120, and/or any other component(s) ofFIG.2may perform one or more techniques associated with performing RAT searching in a dual active mode, as described in more detail elsewhere herein. For example, the controller/processor240of the base station110, the controller/processor280of the UE120, and/or any other component(s) ofFIG.2may perform or direct operations of, for example, process600ofFIG.6, and/or other processes as described herein. The memory242and the memory282may store data and program codes for the base station110and the UE120, respectively. In some examples, the memory242and/or the memory282may include a non-transitory computer-readable medium storing one or more instructions (e.g., code and/or program code) for wireless communication. For example, the one or more instructions, when executed (e.g., directly, or after compiling, converting, and/or interpreting) by one or more processors of the base station110and/or the UE120, may cause the one or more processors, the UE120, and/or the base station110to perform or direct operations of, for example, process600ofFIG.6, and/or other processes as described herein. In some examples, executing instructions may include running the instructions, converting the instructions, compiling the instructions, and/or interpreting the instructions, among other examples.

In some aspects, a UE (e.g., the UE120) may include means for detecting that a first subscription, of a plurality of subscriptions associated with the UE, is associated with an active service on a first cellular network; and/or means for searching, for a second subscription of the plurality of subscriptions, for RATs and frequency bands that are compatible with a dual active mode of the UE. The means for the UE to perform operations described herein may include, for example, one or more of communication manager140, antenna252, modem254, MIMO detector256, receive processor258, transmit processor264, TX MIMO processor266, controller/processor280, or memory282.

While blocks inFIG.2are illustrated as distinct components, the functions described above with respect to the blocks may be implemented in a single hardware, software, or combination component or in various combinations of components. For example, the functions described with respect to the transmit processor264, the receive processor258, and/or the TX MIMO processor266may be performed by or under the control of the controller/processor280.

As indicated above,FIG.2is provided as an example. Other examples may differ from what is described with regard toFIG.2.

FIG.3is a diagram illustrating an example300of a multi-SIM UE, in accordance with the present disclosure. As shown inFIG.3, a UE120may be a multiple SIM (multi-SIM) UE that includes multiple SIMs (two or more SIMs), shown as a first SIM305aand a second SIM305b. The first SIM305amay be associated with a first subscription (shown as SUB1), and the second SIM305bmay be associated with a second subscription (shown as SUB2). A subscription may be a subscription with a network operator (for example, an MNO) that enables the UE120to access a wireless network (for example, a RAN) associated with the network operator.

A SIM305may be a removable SIM (for example, a SIM card) or an embedded SIM. A SIM305may include an integrated circuit that securely stores an international mobile subscriber identity (IMSI) and a security key, which are used to identify and authenticate a corresponding subscription associated with the SIM305. In some cases, a SIM305may store a list of services that the UE120has permission to access using a subscription associated with the SIM305, such as a data service or a voice service, among other examples.

As further shown inFIG.3, the UE120may communicate (for example, in a connected mode, an idle mode, or an inactive mode) with a first base station310avia a first cell315a(shown as Cell1) using the first SIM305a. In this case, a first subscription (SUB1) of the UE120may be used to access the first cell315a(for example, using a first IMSI for UE identification, using a first security key for UE authentication, using a first list of services that the UE120is permitted to access using the first subscription, or by counting data or voice usage on the first cell against the first subscription, among other examples). Similarly, the UE120may communicate (for example, in a connected mode, an idle mode, or an inactive mode) with a second base station310bvia a second cell315b(shown as Cell2) using the second SIM305b. In this case, a second subscription (SUB2) of the UE120may be used to access the second cell315b(for example, using a second IMSI for UE identification, using a second security key for UE authentication, using a second list of services that the UE120is permitted to access using the second subscription, or by counting data or voice usage on the second cell against the second subscription, among other examples).

The first base station310aand/or the second base station310bmay include one or more of the base stations110described above in connection withFIG.1. Each of the first base station310aand the second base station310bmay include an RU that exchanges wireless signals with the UE120, connected to a corresponding DU and CU that use digital signals to instruct the RU with respect to the wireless signals transmitted to the UE and perform processing on digital signals based on the wireless signals received by the RU. Although the first cell315aand the second cell315bare shown as being provided by different base stations, in some aspects, the first cell315and the second cell315bmay be provided by the same base station. Thus, in some aspects, the first base station310aand the second base station310bmay be integrated into a single base station.

In some cases, the UE120may be capable of operating in a multi-SIM multiple standby (MSMS) mode, such as a dual SIM dual standby (DSDS) mode (e.g., when the UE120is associated with two subscriptions). Additionally, or alternatively, the UE120may be capable of operating in a multi-SIM multiple active (MSMA) mode, such as a dual SIM dual active (DSDA) mode (e.g., when the UE120is associated with two subscriptions).

In a DSDA mode, the UE120is capable of concurrent active communication using both SIMs of the UE120. Thus, a UE120in the DSDA mode is capable of communicating using the first SIM305a(and the first subscription) at the same time as communicating using the second SIM305b(and the second subscription). For example, when the UE120is in an active session (e.g., a voice call or another latency sensitive service, such as online gaming, stock trading, or an over-the-top (OTT) service) using the first SIM305a, the UE120is capable of receiving a notification of a voice call using the second SIM305bwithout interrupting communications that use the first SIM305a, and without tuning or switching away from the first cell315ato tune to the second cell315b.

In a DSDS mode, the UE120is not capable of concurrent active communication using both SIMs of the UE120. Thus, a UE120in the DSDS mode is not capable of communicating using the first SIM305a(and the first subscription) at the same time as communicating using the second SIM305b(and the second subscription). However, a UE120in the DSDS mode may be capable of switching between two separate mobile network services, may include hardware for maintaining multiple connections (for example, one connection per SIM) in a standby state, or may include hardware (for example, multiple transceivers) for maintaining multiple network connections at the same time, among other examples. However, a UE120in the DSDS mode may be capable of receiving data on only one connection at a time because radio frequency resources are shared between the multiple subscriptions. For example, a UE120in the DSDS mode may be associated with multiple subscriptions but may include only a single transceiver shared by the multiple subscriptions, a single transmit chain shared by the multiple subscriptions, or a single receive chain shared by the multiple subscriptions, among other examples.

In some examples, a UE120may be capable of operating in a DSDA mode for a first combination of RATs, and may not be capable of operating in a DSDA mode for a second combination of RATs. For example, the UE120may be capable of operating in a DSDA mode for NR+NR, where the first cell315a(as well as the first SIM305aand the first subscription) uses an NR RAT and the second cell315b(as well as the second SIM305band the second subscription) also uses the NR RAT. However, the UE120may not be capable of operating in a DSDA mode for NR+LTE, where one of the first cell315a(as well as the first SIM305aand the first subscription) uses an NR RAT and the second cell315b(as well as the second SIM305band the second subscription) uses an LTE RAT (or vice versa). In some aspects, the UE120may not be capable of operating in the DSDA mode for the second combination of RATs (e.g., NR+LTE), but be capable of operating in a DSDS mode for the second combination of RATs. Similarly, the UE120may be capable of operating in a DSDA mode for a first combination of frequency bands (e.g., operating frequency bands) and may not be capable of operating in a DSDA mode for a second combination of frequency bands. This UE design reduces design costs as compared to enabling the UE120to operate using the DSDA mode for the second combination of RATs. A permissible RAT combination for the DSDA mode may be referred to herein as “DSDA compatible RAT combination.” Similarly, a permissible frequency band combination for the DSDA mode may be referred to herein as a “DSDA compatible frequency band combination.”

In some cases, a multi-SIM UE may be capable of switching between two separate mobile network services or concurrently using two separate mobile network services, may include hardware for maintaining multiple connections (for example, one connection per SIM) in a standby state, or may include hardware (for example, multiple transceivers) for maintaining multiple network connections at the same time, among other examples. A DSDA UE may be capable of communicating on two connections at a given time, such as for multiple communications associated with different RATs or multiple communications of a single RAT. The communication on two connections may be handled by a radio frequency (RF) hardware front-end module (sometimes referred to as a radio frequency front-end (RFFE)), which is illustrated in a general sense by reference number320. The RF hardware front-end module may include, for example, one or more power amplifiers (PAs), one or more low noise amplifiers (LNAs), one or more band filters, one or more band N-plexers, one or more band switches, and/or one or more antenna switches, among other examples.

In a multi-SIM mode such as a DSDA mode, a default data SIM (DDS) subscription may perform data activity, call activity, or the like. A non-DDS subscription may perform call-related activity, small data activity (e.g., short message service (SMS) activity or multimedia message service (MMS) activity), or similar tasks. As used herein, a “subscriber” may refer to a user, who is associated with a “subscription” that is implemented by a stack of hardware and/or software at a modem of the UE. The “subscription” may be associated with a SIM and/or another type of identifier that a network can use to provision network services to the UE implementing the subscription.

In some cases, a first service associated with a first subscription and a second service associated with a second subscription may be concurrently active (e.g., may have concurrently established communications). In such a situation, the UE may perform concurrent transmissions for two subscriptions, concurrent receptions for two subscriptions, or concurrent transmission for a first subscription and receptions for a second subscription. For example, the concurrently active services may communicate on a shared RF hardware front-end module or may share an antenna switch.

As mentioned above, a DSDA configuration allows a UE to have multiple concurrently active services associated with multiple subscribers, such as a first service associated with a DDS subscriber and a second service associated with a non-DDS subscriber. Thus, a UE may be capable of establishing calls, such as voice calls (e.g., mobile-originated (MO) calls, mobile-terminated (MT) calls, data calls, Enhanced 911 calls, gaming traffic, and/or calls associated with a threshold quality of service), and/or other services (such as gaming traffic, internet data, and/or SMS traffic) for multiple concurrently active services. A call may be associated with a RAT and/or a frequency band. For example, a call may be placed via NR (in which case the call is in accordance with NR protocol and is associated with a NR core network such as a 5G core (5GC)) or via LTE (in which case the call is in accordance with LTE protocol and is associated with an LTE core network such as an Evolved Packet System (EPS)).

In some cases, different services may be associated with different priority levels. For example, a first service may be associated with a higher priority than a second service. In some examples, each service may be associated with a priority level or priority value. For example, a configuration (such as a network configuration or an original equipment manufacturer (OEM) configuration) may indicate priority levels for different services. For example, an active voice call or video call may be associated with a first priority level, gaming traffic (e.g., on a DDS subscription) may be associated with a second priority level, an inactive or on-hold voice call or video call may be associated with a third priority level, voice signaling traffic (e.g., signaling to initiate and/or maintain a voice call) may be associated with a fourth priority level, and/or internet data traffic (and/or link list memory (LLM) gaming traffic) may be associated with a fifth priority level, among other examples. In some examples, the priority levels may indicate an order of priority (e.g., from a highest priority to a lowest priority) from the first priority level to the fifth priority level.

As described elsewhere herein, a UE may have limitations regarding combinations of services, combination of RATs, and/or combinations of frequency bands for the DSDA mode. For example, the UE may be capable of placing multiple concurrent calls via a single RAT (such as NR) as part of a DSDA configuration, but the UE may not be capable of DSDA operation while placing multiple concurrent calls via different RATs (such as a first call via LTE and a second call via NR). Additionally, or alternatively, a configuration (e.g., a network configuration or an OEM configuration) may indicate one or more permissible RAT combinations and/or frequency band combinations for the DSDA mode.

When the UE initiates an active service (e.g., a voice call or a high-priority gaming service) using a first subscription, the second subscription may enter an out-of-service (OOS) state when the second subscription is associated with a RAT and/or a frequency band that is not compatible with the DSDA mode of the UE. For example, the second subscription may be OOS when an RF hardware front-end module is unable to provide resources for the RAT and/or frequency band associated with the second subscription, concurrently with providing resources for the RAT and/or frequency band associated with the first subscription. As used herein, a RAT associated with a second subscription of the UE may be referred to as “not compatible with the DSDA mode of the UE” when the RAT does not form a DSDA compatible RAT combination with a RAT associated with a first subscription of the UE. Similarly, a frequency band associated with the second subscription of the UE may be referred to as “not compatible with the DSDA mode of the UE” when the frequency band does not form a DSDA compatible frequency band combination with a frequency band associated with the first subscription of the UE.

Additionally, or alternatively, the UE may detect radio link failure (RLF) on the second subscription when the second subscription is associated with a RAT and/or a frequency band that is not compatible with the DSDA mode of the UE. For example, the UE may detect RLF when an RF hardware front-end module is unable to perform periodic measurements using the second subscription.

Accordingly, in response to the OOS state and/or the RLF, the UE may attempt to perform cell selection and reconnection using the second subscription. However, the UE may select a RAT and/or a frequency band that is not compatible with the DSDA mode of the UE. Accordingly, the second subscription remains in the OOS state and/or RLF until the active service on the first subscription ends. This reduces throughput to the UE, and wastes battery power and processing resources on the second subscription.

In another example, the UE initiates an active service (e.g., a voice call or a high-priority gaming service) using the first subscription, and the second subscription may remain active when the second subscription is associated with a RAT and a frequency band that are compatible with the DSDA mode of the UE. However, the UE may move and/or radio conditions may change such that measurements on the RAT and the frequency band satisfy a measurement threshold associated with RLF on the second subscription. Additionally, or alternatively, the UE may no longer receive signals from the RAT within a time threshold, such that the second subscription enters an OOS state. Accordingly, the UE may attempt to perform cell selection and reconnection using the second subscription. However, the UE may select a RAT and/or a frequency band that is not compatible with the DSDA mode of the UE. Accordingly, the second subscription is stuck in the OOS state and/or RLF until the active service on the first subscription ends. This reduces throughput to the UE, and wastes battery power and processing resources on the second subscription.

Some techniques and apparatuses described herein enable a UE (e.g., UE120) to perform cell selection in a dual active mode, such as the DSDA mode. For example, the UE120may detect that a first subscription (e.g., a first SIM) is associated with an active service on a first cellular network (e.g., with a first RAT and using a first frequency band). Accordingly, the UE120may search, for a second subscription (e.g., a second SIM), for RATs and frequency bands that are compatible with the dual active mode of the UE120. The UE120may search for RATs and frequency bands that are compatible with the dual active mode of the UE120based at least in part on an OOS state or RLF with a second cellular network (e.g., with a second RAT and using a second frequency band) currently associated with the second subscription. The second RAT and/or the second frequency band may be not compatible with the dual active mode, which results in the OOS state or the RLF. As an alternative, the second RAT and/or the second frequency band may be compatible with the dual active mode but may lose connection during the active service, which results in the OOS state or the RLF. As a result, the UE may operate in the DSDA mode, which results in increased throughput for the UE120and more efficiently uses battery power and processing resources for the second subscription.

In some aspects, the UE120may alternate between searching, for the second subscription, for RATs and frequency bands that are compatible with the dual active mode of the UE120, and operating in a power saving state (e.g., an idle mode, an inactive state, or another mode of operation for the second subscription that is associated with lower power, processing, and/or memory resource consumption as compared with the searching). The alternation may be based at least in part on a timer associated with the power saving state. Accordingly, the UE120may detect when the active service ends and may search, for the second subscription, for RATs and frequency bands that are compatible with the dual active mode of the UE120as well as RATs and frequency bands that are incompatible with the dual active mode, before expiry of the timer associated with the power saving state. As a result, the UE120resumes service on the second subscription more quickly, which reduces latency for the UE120and more efficiently uses battery power and processing resources for the second subscription.

As indicated above,FIG.3is provided as an example. Other examples may differ from what is described with regard toFIG.3.

FIG.4is a diagram illustrating an example400associated with performing cellular selection in a dual active mode, in accordance with the present disclosure. As shown inFIG.4, a UE120may communicate with the first base station310avia the first cell315a(shown as Cell1) using the first SIM305a(e.g., using the first subscription). Additionally, the UE120may communicate with the second base station310bvia the second cell315b(shown as Cell2) using the second SIM305b(e.g., using the second subscription). The UE120may communicate with the first base station310aand the second base station310bin a similar manner as described in connection withFIG.3.

As shown by reference number405a, the UE120may establish, using the first subscription (e.g., using the first SIM305a), a first communication connection with the first base station310a. For example, the UE120and the first base station310amay perform a random access channel (RACH) procedure to establish the first communication connection.

As shown by reference number405b, the UE120may establish, using the second subscription (e.g., using the second SIM305b), a second communication connection with the second base station310b. For example, the UE120and the second base station310bmay perform a RACH procedure to establish the second communication connection.

As shown by reference number410, the UE120may initiate an active service on the first communication connection. For example, the active service may be associated with an active voice call, an active video call, gaming traffic, an inactive or on-hold voice call, an inactive or on-hold video call, voice signaling, and/or internet data traffic, among other examples. In some aspects, the first subscription and/or the first SIM305amay be associated with communicating internet data traffic (e.g., the first subscription may be a DDS subscription). Alternatively, the first subscription and/or the first SIM305amay not be associated with communicating internet data traffic (e.g., the first subscription may not be a DDS subscription (e.g., may be a non-DDS (nDDS) subscription)). The active service may be associated with a priority (e.g., a priority level or a priority value). The priority may indicate a service priority level associated with the traffic being communicated via the first subscription of the UE120.

Accordingly, as shown by reference number415, the UE120may enter an OOS state or detect RLF on the second communication connection. In some aspects, the second subscription and/or the second SIM305bmay have been associated with a second cellular network (e.g., including the second base station310b) that is not compatible with the dual active mode of the UE120. Accordingly, the UE120enters the OOS state or detects the RLF. As an alternative, the second subscription and/or the second SIM305bmay have been associated with a second cellular network (e.g., including the second base station310b) that is compatible with the dual active mode of the UE120; however, mobility of the UE120and/or changing radio conditions may have caused measurements associated with the second cellular network to satisfy a measurement threshold associated with RLF and/or caused loss of signal with the second base station310b. Accordingly, the UE120enters the OOS state or detects the RLF.

As shown by reference number420, the UE120may search, for the second subscription and/or the second SIM305b, for RATs and frequency bands that are compatible with the dual active mode of the UE120. For example, the UE120may exclude, from the search, RATs and frequency bands that are not compatible with the dual active mode of the UE120.

In some aspects, the UE120may perform the search based at least in part on the priority, associated with the active service, satisfying a priority threshold. For example, the priority threshold may comprise a numerical threshold such that the active service satisfies the threshold when the active service is associated with a numerical indicator of priority that satisfies the threshold. Additionally, or alternatively, the priority threshold may include one or more service classes such that the active service satisfies the threshold when the active service is included in the one or more service classes. For example, the active service may satisfy the priority threshold when the active service includes at least one of a voice call or a high-priority gaming service.

Based at least in part on the search, the UE120may connect to a third cellular network that is compatible with the dual active mode using the second subscription and/or the second SIM305b. For example, the UE120may connect to a RAT that is compatible with the dual active mode using a frequency band that is compatible with the dual active mode. Accordingly, in some aspects, the UE120may establish, using the second subscription (e.g., using the second SIM305b), a third communication connection with a third base station. For example, the UE120and the third base station may perform a RACH procedure to establish the third communication connection.

By using techniques as described in connection withFIG.4, the UE120may search, for the second subscription, for RATs and frequency bands that are compatible with the dual active mode of the UE120. The UE120may search for RATs and frequency bands that are compatible with the dual active mode of the UE120based at least in part on an OOS state or RLF associated with the second subscription. As a result, the UE may operate in the DSDA mode, which results in increased throughput for the UE120and more efficiently uses battery power and processing resources for the second subscription.

As indicated above,FIG.4is provided as an example. Other examples may differ from what is described with respect toFIG.4.

FIG.5is a diagram illustrating an example500associated with performing cellular selection in a dual active mode, in accordance with the present disclosure. As shown inFIG.5, a UE120may communicate with the first base station310avia the first cell315a(shown as Cell1) using the first SIM305a(e.g., using the first subscription). Additionally, the UE120may communicate with the second base station310bvia the second cell315b(shown as Cell2) using the second SIM305b(e.g., using the second subscription). The UE120may communicate with the first base station310aand the second base station310bin a similar manner as described in connection withFIG.3.

As shown by reference number505, the UE120may enter a power saving state using the second subscription (e.g., using the second SIM305b) based at least in part on not finding a cellular network (e.g., not finding a RAT and/or not finding a frequency band) that is compatible with the dual active mode. For example, the UE120may perform one or more operations as described above in connection withFIG.4before entering the power saving state.

In some aspects, the power saving state may be associated with a timer. For example, after expiry of the timer, the UE120may search for RATs and frequency bands for the second subscription and/or the second SIM305b. Accordingly, the UE120may alternate between the power saving state and searching for RATs and frequency bands for the second subscription and/or the second SIM305b.

As shown by reference number510, an active service associated with the first subscription (e.g., the first SIM305a) may end. For example, the active service may include a voice call that terminates, a high-priority gaming service that ends, and/or another service that is no longer using a communication connection with the first base station310a.

As shown by reference number515, the UE120may search for RATs and frequency bands for the second subscription and/or the second SIM305b, before expiry of the timer, based at least in part on the active service ending. In some aspects, the UE120may have been searching only for RATs and frequency bands that are compatible with the dual active mode of the UE120while the active service was ongoing. Accordingly, the UE120may search for RATs and frequency bands that are compatible with the dual active mode of the UE120as well as RATs and frequency bands that are incompatible with the dual active mode, after ending the active service. Therefore, the search after ending the active service is expanded relative to the search while the active service was ongoing.

As a result, the UE120reduces delay between ending the active service and resuming a connection on the second subscription and/or the second SIM305bby searching before expiry of the timer associated with the power saving state. As shown by reference number520, the UE120may connect to a third cellular network that is not compatible with the dual active mode using the second subscription and/or the second SIM305b. For example, the UE120may connect to a RAT that is not compatible with the dual active mode and/or may connect using a frequency band that is not compatible with the dual active mode. Accordingly, in some aspects, the UE120may establish, using the second subscription (e.g., using the second SIM305b), a third communication connection with a third base station. For example, the UE120and the third base station may perform a RACH procedure to establish the third communication connection.

By using techniques as described in connection withFIG.5, the UE120may detect when the active service, associated with the first subscription, ends and may search, for the second subscription, for RATs and frequency bands that are compatible with the dual active mode of the UE120as well as RATs and frequency bands that are incompatible with the dual active mode, before expiry of the timer associated with the power saving state. As a result, the UE120resumes service on the second subscription more quickly, which reduces latency for the UE120and more efficiently uses battery power and processing resources for the second subscription.

As indicated above,FIG.5is provided as an example. Other examples may differ from what is described with respect toFIG.5.

FIG.6is a diagram illustrating an example process600performed, for example, by a UE, in accordance with the present disclosure. Example process600is an example where the UE (e.g., UE120and/or apparatus700ofFIG.7) performs operations associated with RAT searching in a dual active mode.

As shown inFIG.6, in some aspects, process600may include detecting that a first subscription, of a plurality of subscriptions associated with the UE, is associated with an active service on a first cellular network (block610). For example, the UE (e.g., using communication manager140and/or detection component708, depicted inFIG.7) may detect that a first subscription, of a plurality of subscriptions associated with the UE, is associated with an active service on a first cellular network, as described herein.

As further shown inFIG.6, in some aspects, process600may include searching, for a second subscription of the plurality of subscriptions, for RATs and frequency bands that are compatible with a dual active mode of the UE (block620). For example, the UE (e.g., using communication manager140and/or searching component710, depicted inFIG.7) may search, for a second subscription of the plurality of subscriptions, for RATs and frequency bands that are compatible with a dual active mode of the UE, as described herein.

Process600may include additional aspects, such as any single aspect or any combination of aspects described below and/or in connection with one or more other processes described elsewhere herein.

In a first aspect, the first subscription is associated with a first SIM, and the second subscription is associated with a second SIM.

In a second aspect, alone or in combination with the first aspect, the dual active mode comprises a DSDA mode.

In a third aspect, alone or in combination with one or more of the first and second aspects, the active service is associated with a priority that satisfies a priority threshold.

In a fourth aspect, alone or in combination with one or more of the first through third aspects, the second subscription is currently associated with a service on a second cellular network that is not compatible with the dual active mode, and process600further includes entering an OOS state with the second cellular network (e.g., using communication manager140, reception component702, and/or transmission component704, depicted inFIG.7) or detecting RLF with the second cellular network (e.g., using communication manager140and/or detection component708), such that searching for RATs and frequency bands that are compatible with the dual active mode is based at least in part on the OOS state or the RLF.

In a fifth aspect, alone or in combination with one or more of the first through fourth aspects, process600further includes connecting to a third cellular network (e.g., using communication manager140, reception component702, and/or transmission component704) that is compatible with the dual active mode using the second subscription.

In a sixth aspect, alone or in combination with one or more of the first through fifth aspects, process600further includes entering a power saving state (e.g., using communication manager140, reception component702, and/or transmission component704) using the second subscription based at least in part on not finding a cellular network that is compatible with the dual active mode.

In a seventh aspect, alone or in combination with one or more of the first through sixth aspects, process600further includes detecting that the active service on the first cellular network has ended (e.g., using communication manager140and/or detection component708), and searching (e.g., using communication manager140and/or searching component710), for the second subscription, for RATs and frequency bands that are compatible with the dual active mode of the UE and for RATs and frequency bands that are incompatible with the dual active mode, before expiry of a timer associated with the power saving state.

In an eighth aspect, alone or in combination with one or more of the first through seventh aspects, the second subscription is currently associated with a service on a second cellular network that is compatible with the dual active mode, and process600further includes entering an OOS state with the second cellular network (e.g., using communication manager140, reception component702, and/or transmission component704) or detecting RLF with the second cellular network (e.g., using communication manager140and/or detection component708), such that searching for RATs and frequency bands that are compatible with the dual active mode is based at least in part on the OOS state or the RLF.

In a ninth aspect, alone or in combination with one or more of the first through eighth aspects, the active service includes at least one of a voice call or a high-priority gaming service.

AlthoughFIG.6shows example blocks of process600, in some aspects, process600may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted inFIG.6. Additionally, or alternatively, two or more of the blocks of process600may be performed in parallel.

FIG.7is a diagram of an example apparatus700for wireless communication. The apparatus700may be a UE, or a UE may include the apparatus700. In some aspects, the apparatus700includes a reception component702and a transmission component704, which may be in communication with one another (for example, via one or more buses and/or one or more other components). As shown, the apparatus700may communicate with another apparatus706(such as a UE, a base station, or another wireless communication device) using the reception component702and the transmission component704. As further shown, the apparatus700may include the communication manager140. The communication manager140may include one or more of a detection component708and/or a searching component710, among other examples.

In some aspects, the apparatus700may be configured to perform one or more operations described herein in connection withFIGS.4-5. Additionally, or alternatively, the apparatus700may be configured to perform one or more processes described herein, such as process600ofFIG.6, or a combination thereof. In some aspects, the apparatus700and/or one or more components shown inFIG.7may include one or more components of the UE described in connection withFIG.2. Additionally, or alternatively, one or more components shown inFIG.7may be implemented within one or more components described in connection withFIG.2. Additionally, or alternatively, one or more components of the set of components may be implemented at least in part as software stored in a memory. For example, a component (or a portion of a component) may be implemented as instructions or code stored in a non-transitory computer-readable medium and executable by a controller or a processor to perform the functions or operations of the component.

The reception component702may receive communications, such as reference signals, control information, data communications, or a combination thereof, from the apparatus706. The reception component702may provide received communications to one or more other components of the apparatus700. In some aspects, the reception component702may perform signal processing on the received communications (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, de-mapping, equalization, interference cancellation, or decoding, among other examples), and may provide the processed signals to the one or more other components of the apparatus700. In some aspects, the reception component702may include one or more antennas, a modem, a demodulator, a MIMO detector, a receive processor, a controller/processor, a memory, or a combination thereof, of the UE described in connection withFIG.2.

The transmission component704may transmit communications, such as reference signals, control information, data communications, or a combination thereof, to the apparatus706. In some aspects, one or more other components of the apparatus700may generate communications and may provide the generated communications to the transmission component704for transmission to the apparatus706. In some aspects, the transmission component704may perform signal processing on the generated communications (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, among other examples), and may transmit the processed signals to the apparatus706. In some aspects, the transmission component704may include one or more antennas, a modem, a modulator, a transmit MIMO processor, a transmit processor, a controller/processor, a memory, or a combination thereof, of the UE described in connection withFIG.2. In some aspects, the transmission component704may be co-located with the reception component702in a transceiver.

In some aspects, the detection component708may detect that a first subscription, of a plurality of subscriptions associated with the apparatus700, is associated with an active service on a first cellular network. The detection component708may include a modem, a MIMO detector, a receive processor, a transmit MIMO processor, a transmit processor, a controller/processor, a memory, or a combination thereof, of the UE described in connection withFIG.2. Accordingly, the searching component710may search, for a second subscription of the plurality of subscriptions, for RATs and frequency bands that are compatible with a dual active mode of the apparatus700. The searching component710may include one or more antennas, a modem, a demodulator, a MIMO detector, a receive processor, a controller/processor, a memory, or a combination thereof, of the UE described in connection withFIG.2.

In some aspects, the reception component702and/or the transmission component704may connect to a third cellular network that is compatible with the dual active mode using the second subscription. As an alternative, the reception component702and/or the transmission component704may enter a power saving state using the second subscription based at least in part on not finding a cellular network that is compatible with the dual active mode.

In some aspects, the detection component708may detect that the active service on the first cellular network has ended. Accordingly, the searching component710may search, for the second subscription, for RATs and frequency bands that are compatible with the dual active mode of the apparatus700and for RATs and frequency bands that are incompatible with the dual active mode, before expiry of a timer associated with the power saving state.

The number and arrangement of components shown inFIG.7are provided as an example. In practice, there may be additional components, fewer components, different components, or differently arranged components than those shown inFIG.7. Furthermore, two or more components shown inFIG.7may be implemented within a single component, or a single component shown inFIG.7may be implemented as multiple, distributed components. Additionally, or alternatively, a set of (one or more) components shown inFIG.7may perform one or more functions described as being performed by another set of components shown inFIG.7.

FIG.8is a diagram of an example apparatus800for wireless communication. The apparatus800may be a RAN node (e.g., a CU, a DU, and/or an RU), or a RAN node may include the apparatus800. In some aspects, the apparatus800includes a reception component802and a transmission component804, which may be in communication with one another (for example, via one or more buses and/or one or more other components). As shown, the apparatus800may communicate with another apparatus806(such as a UE, a base station, or another wireless communication device) using the reception component802and the transmission component804. As further shown, the apparatus800may include the communication manager150. The communication manager150may include one or more of a service component808and/or a random access component810, among other examples.

In some aspects, the apparatus800may be configured to perform one or more operations described herein in connection withFIGS.4-5. Additionally, or alternatively, the apparatus800may be configured to perform one or more processes described herein, or a combination thereof. In some aspects, the apparatus800and/or one or more components shown inFIG.8may include one or more components of the base station described in connection withFIG.2. Additionally, or alternatively, one or more components shown inFIG.8may be implemented within one or more components described in connection withFIG.2. Additionally, or alternatively, one or more components of the set of components may be implemented at least in part as software stored in a memory. For example, a component (or a portion of a component) may be implemented as instructions or code stored in a non-transitory computer-readable medium and executable by a controller or a processor to perform the functions or operations of the component.

The reception component802may receive communications, such as reference signals, control information, data communications, or a combination thereof, from the apparatus806. The reception component802may provide received communications to one or more other components of the apparatus800. In some aspects, the reception component802may perform signal processing on the received communications (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, de-mapping, equalization, interference cancellation, or decoding, among other examples), and may provide the processed signals to the one or more other components of the apparatus800. In some aspects, the reception component802may include one or more antennas, a modem, a demodulator, a MIMO detector, a receive processor, a controller/processor, a memory, or a combination thereof, of the base station described in connection withFIG.2.

The transmission component804may transmit communications, such as reference signals, control information, data communications, or a combination thereof, to the apparatus806. In some aspects, one or more other components of the apparatus800may generate communications and may provide the generated communications to the transmission component804for transmission to the apparatus806. In some aspects, the transmission component804may perform signal processing on the generated communications (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, among other examples), and may transmit the processed signals to the apparatus806. In some aspects, the transmission component804may include one or more antennas, a modem, a modulator, a transmit MIMO processor, a transmit processor, a controller/processor, a memory, or a combination thereof, of the base station described in connection withFIG.2. In some aspects, the transmission component804may be co-located with the reception component802in a transceiver.

In some aspects, the service component808may provision an active service for a first subscription of the apparatus806. When the apparatus800(and a corresponding frequency band) are compatible with a dual active mode of the apparatus806, the apparatus806may search, for a second subscription of the apparatus806, for RATs and frequency bands compatible with the dual active mode.

As an alternative, the random access component810may process a connection request from the apparatus806. For example, when the apparatus800and a corresponding frequency band are compatible with a dual active mode of the apparatus806, the apparatus806may request a connection with the apparatus800for a second subscription while an active service associated with a first subscription of the apparatus806is ongoing.

The number and arrangement of components shown inFIG.8are provided as an example. In practice, there may be additional components, fewer components, different components, or differently arranged components than those shown inFIG.8. Furthermore, two or more components shown inFIG.8may be implemented within a single component, or a single component shown inFIG.8may be implemented as multiple, distributed components. Additionally, or alternatively, a set of (one or more) components shown inFIG.8may perform one or more functions described as being performed by another set of components shown inFIG.8.

The following provides an overview of some Aspects of the present disclosure:

Aspect 1: A method of wireless communication performed by a user equipment (UE), comprising: detecting that a first subscription, of a plurality of subscriptions associated with the UE, is associated with an active service on a first cellular network; and searching, for a second subscription of the plurality of subscriptions, for radio access technologies (RATs) and frequency bands that are compatible with a dual active mode of the UE.

Aspect 2: The method of Aspect 1, wherein the first subscription is associated with a first subscriber identity module (SIM), and the second subscription is associated with a second SIM.

Aspect 3: The method of Aspect 2, wherein the dual active mode comprises a dual SIM dual active (DSDA) mode.

Aspect 4: The method of any of Aspects 1 through 3, wherein the active service is associated with a priority that satisfies a priority threshold.

Aspect 5: The method of any of Aspects 1 through 4, wherein the second subscription is currently associated with a service on a second cellular network that is not compatible with the dual active mode, and wherein the method further comprises: entering an out-of-service (OOS) state with the second cellular network or detecting radio link failure (RLF) with the second cellular network, wherein the searching for RATs and frequency bands that are compatible with the dual active mode is based at least in part on the OOS state or the RLF.

Aspect 6: The method of Aspect 5, further comprising: connecting to a third cellular network that is compatible with the dual active mode using the second subscription.

Aspect 7: The method of Aspect 5, further comprising: entering a power saving state using the second subscription based at least in part on not finding a cellular network that is compatible with the dual active mode.

Aspect 8: The method of Aspect 7, further comprising: detecting that the active service on the first cellular network has ended; and searching, for the second subscription, for RATs and frequency bands that are compatible with the dual active mode of the UE and for RATs and frequency bands that are incompatible with the dual active mode, before expiry of a timer associated with the power saving state.

Aspect 9: The method of any of Aspects 1 through 4, wherein the second subscription is currently associated with a service on a second cellular network that is compatible with the dual active mode, and wherein the method further comprises: entering an out-of-service (OOS) state with the second cellular network or detecting radio link failure (RLF) with the second cellular network, wherein the searching for RATs and frequency bands that are compatible with the dual active mode is based at least in part on the OOS state or the RLF.

Aspect 10: The method of any of Aspects 1 through 9, wherein the active service includes at least one of a voice call or a high-priority gaming service.

Aspect 11: An apparatus for wireless communication at a device, 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 the method of one or more of Aspects 1-10.

Aspect 12: A device for wireless communication, comprising a memory and one or more processors coupled to the memory, the one or more processors configured to perform the method of one or more of Aspects 1-10.

Aspect 13: An apparatus for wireless communication, comprising at least one means for performing the method of one or more of Aspects 1-10.

Aspect 15: A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by a processor to perform the method of one or more of Aspects 1-10.

Aspect 15: A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising one or more instructions that, when executed by one or more processors of a device, cause the device to perform the method of one or more of Aspects 1-10.

The foregoing disclosure provides illustration and description but is not intended to be exhaustive or to limit the aspects to the precise forms disclosed. Modifications and variations may be made in light of the above disclosure or may be acquired from practice of the aspects.

As used herein, the term “component” is intended to be broadly construed as hardware and/or a combination of hardware and software. “Software” shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, and/or functions, among other examples, whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise. As used herein, a “processor” is implemented in hardware and/or a combination of hardware and software. It will be apparent that systems and/or methods described herein may be implemented in different forms of hardware and/or a combination of hardware and software. The actual specialized control hardware or software code used to implement these systems and/or methods is not limiting of the aspects. Thus, the operation and behavior of the systems and/or methods are described herein without reference to specific software code, since those skilled in the art will understand that software and hardware can be designed to implement the systems and/or methods based, at least in part, on the description herein.

As used herein, “satisfying a threshold” may, depending on the context, refer to a value being greater than the threshold, greater than or equal to the threshold, less than the threshold, less than or equal to the threshold, equal to the threshold, not equal to the threshold, or the like.

Even though particular combinations of features are recited in the claims and/or disclosed in the specification, these combinations are not intended to limit the disclosure of various aspects. Many of these features may be combined in ways not specifically recited in the claims and/or disclosed in the specification. The disclosure of various aspects includes each dependent claim in combination with every other claim in the claim set. As used herein, a phrase referring to “at least one of” a list of items refers to any combination of those items, including single members. As an example, “at least one of: a, b, or c” is intended to cover a, b, c, a+b, a+c, b+c, and a+b+c, as well as any combination with multiples of the same element (e.g., a+a, a+a+a, a+a+b, a+a+c, a+b+b, a+c+c, b+b, b+b+b, b+b+c, c+c, and c+c+c, or any other ordering of a, b, and c).

No element, act, or instruction used herein should be construed as critical or essential unless explicitly described as such. Also, as used herein, the articles “a” and “an” are intended to include one or more items and may be used interchangeably with “one or more.” Further, as used herein, the article “the” is intended to include one or more items referenced in connection with the article “the” and may be used interchangeably with “the one or more.” Furthermore, as used herein, the terms “set” and “group” are intended to include one or more items and may be used interchangeably with “one or more.” Where only one item is intended, the phrase “only one” or similar language is used. Also, as used herein, the terms “has,” “have,” “having,” or the like are intended to be open-ended terms that do not limit an element that they modify (e.g., an element “having” A may also have B). Further, the phrase “based on” is intended to mean “based, at least in part, on” unless explicitly stated otherwise. Also, as used herein, the term “or” is intended to be inclusive when used in a series and may be used interchangeably with “and/or,” unless explicitly stated otherwise (e.g., if used in combination with “either” or “only one of”).