TECHNIQUES TO CONFIGURE LOW NOISE AMPLIFIER FOR DUAL-SUBSCRIBER DUAL-ACTIVE USER EQUIPMENT

Methods, systems, and devices for wireless communications are described for low noise amplifier (LNA) configurations of a user equipment (UE) operating in a dual-subscriber dual-active (DSDA) mode. The UE may establish first and second communications links via two or more antenna ports using a first subscriber identity module (SIM) and a second SIM in the DSDA mode. The UE may identify a LNA configuration from two or more available LNA configurations for receiving at least partially concurrent communications of the first SIM and the second SIM based at least in part on activation of the DSDA mode and a difference between a first received signal strength associated with the first SIM and a second received signal strength associated with the second SIM. The UE may receive the at least partially concurrent communications via the two or more antenna ports based at least in part on the identified LNA configuration.

FIELD OF TECHNOLOGY

The following relates to wireless communications, including techniques to configure low noise amplifier for dual-subscriber dual-active user equipment.

BACKGROUND

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). In some cases, a UE may be capable of supporting multiple subscriber identification module (SIM) cards, each associated with a unique network subscription, and the UE may communicate with multiple service providers using the multiple SIM cards.

SUMMARY

The described techniques relate to improved methods, systems, devices, and apparatuses that support techniques to configure low noise amplifier for dual-subscriber dual-active (DSDA) user equipment. For example, the described techniques provide for selection of low noise amplifier (LNA) configurations for communications associated with multiple subscriber identification modules (SIMs) using a DSDA configuration. In some cases, a UE operating in a DSDA configuration may determine a difference in received signal strengths (e.g., based on a received signal strength indicator (RSSI)) between SIMs, and select a LNA configuration based on the difference. In some cases, different LNA configurations may be selected based on an amount of power imbalance between different SIMs. For example, in a first power imbalance region a first LNA configuration may provide that each SIM uses signals from each antenna port and LNA gains are set based on the stronger SIM. In a second power imbalance region a fallback mode may be entered in which the lower strength SIM is used to control LNA gain for one or more antenna ports. The fallback mode may use different gain control options, such as having the stronger SIM control gain for a first subset of antenna ports and the weaker SIM control gain for a second subset of antenna ports. Further, depending on a level of the imbalance, the stronger SIM may tune away on the second subset of antenna ports to avoid saturating the signals of the weaker SIM.

A method for wireless communication at a user equipment (UE) is described. The method may include establishing a first communications link via two or more antenna ports using a first SIM of the UE in a dual-subscriber dual-active mode, establishing a second communications link via the two or more antenna ports using a second SIM of the UE in the dual-subscriber dual-active mode, the dual-subscriber dual-active mode for receiving concurrent communications for at least the first SIM and the second SIM via the two or more antenna ports of the UE, the concurrent communications including first communications using the first SIM and second communications using the second SIM, identifying a low noise amplifier configuration from two or more available low noise amplifier configurations for receiving each of the first communications and the second communications based on activation of the dual-subscriber dual-active mode, the identifying based on a difference between a first received signal strength associated with the first communications and a second received signal strength associated with the second communications, and receiving the first communications and the second communications via the two or more antenna ports based on the identified low noise amplifier configuration.

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 establish a first communications link via two or more antenna ports using a first SIM of the UE in a dual-subscriber dual-active mode, establish a second communications link via the two or more antenna ports using a second SIM of the UE in the dual-subscriber dual-active mode, the dual-subscriber dual-active mode for receiving concurrent communications for at least the first SIM and the second SIM via the two or more antenna ports of the UE, the concurrent communications including first communications using the first SIM and second communications using the second SIM, identify a low noise amplifier configuration from two or more available low noise amplifier configurations for receiving each of the first communications and the second communications based on activation of the dual-subscriber dual-active mode, the identifying based on a difference between a first received signal strength associated with the first communications and a second received signal strength associated with the second communications, and receive the first communications and the second communications via the two or more antenna ports based on the identified low noise amplifier configuration.

Another apparatus for wireless communication at a UE is described. The apparatus may include means for establishing a first communications link via two or more antenna ports using a first SIM of the UE in a dual-subscriber dual-active mode, means for establishing a second communications link via the two or more antenna ports using a second SIM of the UE in the dual-subscriber dual-active mode, the dual-subscriber dual-active mode for receiving concurrent communications for at least the first SIM and the second SIM via the two or more antenna ports of the UE, the concurrent communications including first communications using the first SIM and second communications using the second SIM, means for identifying a low noise amplifier configuration from two or more available low noise amplifier configurations for receiving each of the first communications and the second communications based on activation of the dual-subscriber dual-active mode, the identifying based on a difference between a first received signal strength associated with the first communications and a second received signal strength associated with the second communications, and means for receiving the first communications and the second communications via the two or more antenna ports based on the identified low noise amplifier configuration.

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 establish a first communications link via two or more antenna ports using a first SIM of the UE in a dual-subscriber dual-active mode, establish a second communications link via the two or more antenna ports using a second SIM of the UE in the dual-subscriber dual-active mode, the dual-subscriber dual-active mode for receiving concurrent communications for at least the first SIM and the second SIM via the two or more antenna ports of the UE, the concurrent communications including first communications using the first SIM and second communications using the second SIM, identify a low noise amplifier configuration from two or more available low noise amplifier configurations for receiving each of the first communications and the second communications based on activation of the dual-subscriber dual-active mode, the identifying based on a difference between a first received signal strength associated with the first communications and a second received signal strength associated with the second communications, and receive the first communications and the second communications via the two or more antenna ports based on the identified low noise amplifier configuration.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the identifying the low noise amplifier configuration may include operations, features, means, or instructions for measuring the first received signal strength associated with the first communications and the second received signal strength associated with the second communications to determine a difference between the first received signal strength and the second received signal strength, selecting, responsive to the difference between the first received signal strength and the second received signal strength being less than or equal to a first threshold value, a first low noise amplifier configuration in which each of the first SIM and the second SIM use each of a set of multiple low noise amplifiers associated with a set of antenna ports that receive both the first communications and the second communications, and selecting, responsive to the difference between the first received signal strength and the second received signal strength exceeding the first threshold value, a second low noise amplifier configuration in which the first SIM controls a first subset of low noise amplifiers associated with a first subset of the set of antenna ports, and the second SIM controls a second subset of low noise amplifiers associated with a second subset of the set of antenna ports.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the first subset of low noise amplifiers and the second subset of low noise amplifiers is determined based on a magnitude of the difference between the first received signal strength and the second received signal strength. In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the first SIM controls a gain of each of the set of multiple low noise amplifiers in the first low noise amplifier configuration. In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the first SIM controls a gain of each of the first subset of low noise amplifiers, and the second SIM controls the gain of each of the second subset of low noise amplifiers, in the second low noise amplifier configuration. In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the first SIM uses signals from each antenna port of the first subset of antenna ports and the second subset of antenna ports for receiving the first communications when the second low noise amplifier configuration is selected.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the first SIM does not use any of the antenna ports of the second subset of antenna ports for receiving the first communications when the second low noise amplifier configuration is selected. In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the first SIM does not use any of the antenna ports of the second subset of antenna ports for receiving the first communications when the second low noise amplifier configuration is selected, and the second SIM does not use any of the antenna ports of the first subset of antenna ports for receiving the second communications when the second low noise amplifier configuration is selected.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the identified low noise amplifier configuration provides for control of a set of multiple low noise amplifiers at the UE, the set of multiple low noise amplifiers include two or more internal low noise amplifiers that are internal to a wireless modem of the UE and two or more external low noise amplifiers that are external to the wireless modem of the UE, and where the first communications link and the second communications link each include one or more component carriers.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, radio frequency signals from each of the two or more external low noise amplifiers may be split and provided to respective first internal low noise amplifiers associated with the first SIM and second internal low noise amplifiers associated with the second SIM. In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, radio frequency signals from each of the two or more external low noise amplifiers are provided to an associated internal low noise amplifier, and an output from each of the two or more internal low noise amplifiers is split and provided to separate processing chains associated with the first SIM and the second SIM.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the first SIM controls an automatic gain control for at least a first subset of the set of multiple low noise amplifiers, and the second SIM controls the automatic gain control for at least a second subset of the set of multiple low noise amplifiers, and where a timing for updating the automatic gain control is based on which of the first SIM or the second SIM controls the associated low noise amplifier.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the identifying the low noise amplifier configuration may include operations, features, means, or instructions for determining that the difference between a first received signal strength associated with the first communications and a second received signal strength associated with the second communications exceeds a threshold value and selecting, responsive to the determining, a low noise amplifier configuration in which the first SIM controls at least one of the two or more internal low noise amplifiers and at least one of the two or more external low noise amplifiers, and in which the second SIM controls at least one of the two or more internal low noise amplifiers. In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the threshold value is based on a gain control or dynamic tuning range of the two or more internal low noise amplifiers.

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 first SIM may have a higher priority than the second SIM and mapping a first subset of the two or more antenna ports to the first SIM based on the higher priority of the first SIM, and where the low noise amplifier configuration is based on the mapping. In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the receiving may include operations, features, means, or instructions for setting one or more analog-to-digital converter (ADC) parameters for the first communications based on a frequency offset between the first communications and the second communications when the first communications may have a stronger signal strength than the second communications.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the identifying includes identifying a first low noise amplifier configuration based on the difference between the first received signal strength and the second received signal strength being less than or equal to a first threshold value, the first low noise amplifier configuration providing that each SIM uses each antenna port, and associated low noise amplifiers for receiving the respective first and second communications, and where the method may include operations, features, means, or instructions for determining, subsequent to identifying the first low noise amplifier configuration, that the difference between the first received signal strength and the second received signal strength exceeds the first threshold value, selecting a second low noise amplifier configuration responsive to the determining, where the second low noise amplifier configuration provides that the first SIM controls a first subset of low noise amplifiers associated with a first subset of the two or more antenna ports, and the second SIM controls a second subset of low noise amplifiers associated with a second subset of the two or more antenna ports, receiving the first communications via the first subset of antenna ports using the first subset of low noise amplifiers, and receiving the second communications via the second subset of antenna ports using the second subset of low noise amplifiers.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the difference between the first received signal strength and the second received signal strength are determined based on filtered received signal strength indicators (RSSIs) in a sliding window, the filtered RSSIs associated with the first communications and the second communications.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the determining may include operations, features, means, or instructions for determining that the difference between the first received signal strength and the second received signal strength exceeds the first threshold value on a predetermined number of occasions within a predetermined time period.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for determining, subsequent to the selection of the second low noise amplifier configuration, that the difference between the first received signal strength and the second received signal strength is less than or equal to a second threshold value, selecting the first low noise amplifier configuration responsive to the determining that the difference between the first received signal strength and the second received signal strength is less than or equal to a second threshold value, and receiving the first communications and the second communications via the two or more antenna ports based on the first low noise amplifier configuration. In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the second threshold value is less than the first threshold value.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the first SIM controls a set of multiple low noise amplifiers in the first low noise amplifier configuration during periods in which the first SIM is not in a sleep mode, and the second SIM controls the set of multiple low noise amplifiers in the first low noise amplifier configuration during periods in which the first SIM is in the sleep mode. In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the first SIM suspends communications during one or more slots based on a timing drift associated with the first communications or a time division duplexing (TDD) configuration mismatch between the first communications and the second communications.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, a first low noise amplifier configuration of the two or more available low noise amplifier configurations is identified for receiving the first communications and the second communications based on the difference between the first received signal strength and the second received signal strength being less than or equal to a first threshold value, the first low noise amplifier configuration providing that each SIM uses each antenna port and associated low noise amplifiers for receiving the respective first and second communications and where gain control for each of the associated low noise amplifiers are controlled by the first SIM when the first received signal strength exceeds the second received signal strength.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the identifying may include operations, features, means, or instructions for identifying a first low noise amplifier configuration responsive to the UE being in a first state in which the difference between the first received signal strength and the second received signal strength is less than or equal to a first threshold value and each SIM uses each of the two or more antenna ports for the concurrent communications, identifying a second low noise amplifier configuration responsive to the UE being in a second state in which the difference between the first received signal strength and the second received signal strength exceeds the first threshold value, the second low noise amplifier configuration providing that one of the first SIM or the second SIM that may have a lower service priority provides gain control for a first subset of the two or more antenna ports that may have relatively larger differences in received signal strength and the other of the first SIM or the second SIM provides gain control for other antenna ports outside of the first subset of the two or more antenna ports, and identifying a third low noise amplifier configuration responsive to the UE being in a third state in which the difference between the first received signal strength and the second received signal strength exceeds a second threshold value that is greater than the first threshold value, the third low noise amplifier configuration providing that one of the first SIM or the second SIM that may have a higher service priority uses only a first subset of the two or more antenna ports that may have relatively smaller differences in received signal strength and the other of the first SIM or the second SIM uses only one or more other antenna ports outside of the first subset of the two or more antenna ports.

DETAILED DESCRIPTION

In some wireless communications systems, a user equipment (UE) may include two or more subscriber identification modules (SIMs), where each SIM is associated with a different connection through which the UE may communicate. For example, a first SIM may support communications with a first mobile network operator (MNO) and a second SIM may support communications with a second MNO. In other examples, different SIMs may be associated with a same operator (e.g., the first MNO), in a co-band dual-SIM dual-active (DSDA) configuration. Thus, in some cases, UEs may support having each of two or more SIMs active concurrently in accordance with DSDA operation, where a first subscriber and second subscriber (e.g., a first SIM and second SIM, which may also be referred to as a first sub and second sub) in connected mode can share RF resources such as RF components and baseband resources. RF components may include RF front-end devices such as transmit chains, transmit power amplifiers (PAs), receive chains, antenna switches, antennas, band select switches, receive low noise amplifiers (LNAs), and the like. Baseband resources may include processing resources (e.g., computational resources) and memory resources that provide computations for maintenance of one or more communication links of the UE, enhancement in quality of the one or more communication links, or any combinations thereof. While various examples discussed herein relate to cellular wireless communications, the described techniques may be used in any type of system in which RF receive components of a UE are shared for communications with two or more separate networks such as, for example, wireless local area networks (WLANs) accessed by a UE via associated access points.

In some cases, in order to reduce costs, hardware component space, and processing capacity, multiple SIMs may share a same set of RF components (e.g., antennas, LNAs, etc.). In some examples, the receive components may include one or more LNAs that are associated with one or more antenna ports, with a same set of automatic gain control (AGC) settings used for each SIM. Such component sharing and LNA configurations provide for effective communications when each SIM has associated receive signals that have similar power levels. However, in some cases one SIM may be closer to its serving cell than another SIM, which can result in relatively large power imbalances of signals for each SIM. In some existing systems, stronger signals may be used to set LNA gain, which may result in reduced reliability for decoding weaker signals. Further, in some cases, the weaker signals may carry higher priority information, and setting LNA gain based on the stronger signal may impact reliability of the higher priority information. Additionally, if a SIM with weaker signals were to be used to set LNA gain, it may result in LNA saturation of the stronger signals.

In accordance with various aspects discussed herein, enhancements to DSDA operation using shared RF components are provided. In some aspects, a UE operating in a DSDA configuration may determine a difference in received signal strengths (e.g., based on a received signal strength indicator (RSSI)) between SIMs, and select a LNA configuration based on the difference. In some cases, two or more power imbalance regions may be defined (e.g., hard coded at the UE wireless modem, or configurable by the UE manufacturer), and different LNA configurations selected based on the amount of power imbalance. For example, in a first power imbalance region where a difference in signal strengths is less than a threshold value (e.g., a RSSI difference between SIMs of ≤ 10 dB) a first LNA configuration (e.g., a default configuration) may be used in which each SIM uses signals from each antenna port and LNA gains are set based on the stronger SIM. In a second power imbalance region where a difference in signal strengths is greater than the threshold value (e.g., a RSSI difference between SIMs of >10 dB) a fallback mode may be entered in which the lower strength SIM is used to control LNA gain for one or more antenna ports. The fallback mode may use different gain control options, such as having the stronger SIM control gain for a first subset of antenna ports and the weaker SIM control gain for a second subset of antenna ports. Further, depending on a level of the imbalance, the stronger SIM may tune away on the second subset of antenna ports to avoid saturating the signals of the weaker SIM.

Various aspects of the subject matter described in this disclosure may be implemented to realize one or more of the following potential advantages. For example, based on implementing the techniques of the present disclosure, the UE may use RF component configurations for two or more SIMs in which a LNA configuration is selected to provide efficient communications at the UE based on signal strength differences of the SIMs. For example, providing control for the gain control settings of LNAs based on conditions at the UE may allow for a UE to gain control for different SIMs based on current conditions at each SIM. Such techniques may thus enhance UE efficiency, increase data rates, enhance reliability at each SIM, and provide for enhanced user experience.

Aspects of the disclosure are initially described in the context of wireless communications systems. Aspects of the disclosure are further illustrated by and described with reference to receive chain configurations, state diagrams, apparatus diagrams, system diagrams, and flowcharts that relate to techniques to configure LNA for DSDA user equipment.

In the case of the techniques described herein applied in the context of a disaggregated RAN architecture, one or more components of the disaggregated RAN architecture may be configured to support techniques to configure LNA for DSDA user equipment as described herein. For example, some operations described as being performed by a UE115or a network entity105(e.g., a base station140) may additionally, or alternatively, be performed by one or more components of the disaggregated RAN architecture (e.g., IAB nodes104, DUs165, CUs160, RUs170, RIC175, SMO180).

In accordance with various aspects, one or more UEs115may include two or more SIMs, and may select an LNA configuration for communications associated with multiple SIMs using a DSDA configuration in accordance with techniques discussed herein. In some cases, a UE115operating in a DSDA configuration may determine a difference in received signal strengths (e.g., based on a RSSI) between SIMs, and select a LNA configuration from two or more different LNA configurations based on the difference. In some cases, different LNA configurations may be selected based on an amount of power imbalance between different SIMs. For example, in a first power imbalance region a first LNA configuration may provide that each SIM uses signals from each antenna port and LNA gains are set based on the stronger SIM. In a second power imbalance region a fallback mode may be entered in which the lower strength SIM is used to control LNA gain for one or more antenna ports. The fallback mode may use different gain control options, such as having the stronger SIM control gain for a first subset of antenna ports and the weaker SIM control gain for a second subset of antenna ports. Further, depending on a level of the imbalance, the stronger SIM may tune away on the second subset of antenna ports to avoid saturating the signals of the weaker SIM.

FIG.2illustrates an example of a wireless communications system200that supports techniques to configure LNA for DSDA user equipment in accordance with one or more aspects of the present disclosure. In the example ofFIG.2, wireless communications system200may include first network entity105-a, a second network entity105-b, and UE115-a, which may be examples of the corresponding devices described with respect toFIG.1. The first network entity105-amay provide communications for a first network or first cell associated with a first SIM230at the UE115-a, and the second network entity105-bmay provide communications for a second network or second cell associated with a second SIM235at the UE115-a. The first network entity105-amay transmit downlink communications205(e.g., via one or more component carriers) to the UE115-a, and the UE115-amay transmit uplink communications210(e.g., via one or more component carriers) to the first network entity105-a, where the downlink communications205and uplink communications210are associated with the first SIM230. Likewise, the second network entity105-bmay transmit downlink communications215(e.g., via one or more component carriers) to the UE115-a, and the UE115-amay transmit uplink communications220(e.g., via one or more component carriers) to the second network entity105-b, where the downlink communications215and uplink communications220are associated with the second SIM235. The first SIM230and the second SIM235, may be managed by SIM manager225of the UE115-a.

To support communications between first network entity105-a, second network entity105-b, and UE115-a, each network entity105may transmit one or more reference signals250(e.g., channel state information (CSI) reference signals, synchronization signal blocks (SSBs), demodulation reference signals (DMRSs), tracking reference signals (TRSs), and the like, in one or more downlink transmissions255). The UE115-amay measure one or more metrics of received reference signals250and provide measurement reports (e.g., in an uplink transmission260) to the network entities105. In some cases, the SIM manager225may include an LNA manager240, and the UE115-amay determine a LNA configuration for concurrent DSDA communications based on one or more metrics from the measurements of the reference signals250, one or more properties of communications associated with each SIM, and a set of available RF components at the UE115-athat are available to each SIM.

For example, the first SIM230and the second SIM235may operate according to a DSDA configuration. Such a DSDA configuration may provide the UE with enhanced capability for multiple different communications with multiple different network entities105in a concurrent manner. In order to reduce costs and hardware component space, in some cases two or more SIMs may share a same set of RF components (e.g., antenna ports, LNAs, switches, baseband processing resources, etc.). Techniques such as discussed herein may provide a LNA configuration at the UE115-athat is based on the one or more metrics from the measurements of the reference signals250. In some cases, the UE115-a, when operating in the DSDA configuration, may determine a difference in received signal strengths (e.g., based on RSSI) between reference signal250-aof the first network entity105-aand reference signal250-bof the second network entity105-b, and the LNA manager240may select a LNA configuration based on the difference. In some cases, two or more power imbalance regions may be defined (e.g., hard coded at a wireless modem of the UE115-a, or configurable by a manufacturer of the UE115-a), and different LNA configurations may be selected based on the amount of power imbalance.

For example, in a first power imbalance region where a difference in signal strengths is less than a threshold value (e.g., a RSSI difference of ≤ 10 dB) a first LNA configuration (e.g., a default configuration) may be used in which both the first SIM230and the second SIM235each use signals from a same antenna port, and LNA gains are set based on which of the first SIM230or the second SIM235has a higher measured signal strength. In a second power imbalance region where a difference in signal strengths is greater than the threshold value (e.g., a RSSI difference of >10 dB) a fallback mode may be entered in which the lower strength SIM is used to control LNA gain for one or more antenna ports. The fallback mode may use different gain control options, such as having the stronger SIM control gain for a first subset of antenna ports and the weaker SIM control gain for a second subset of antenna ports. Further, depending on a level of the imbalance, the stronger SIM may tune away on the second subset of antenna ports to avoid saturating the signals of the weaker SIM. Various examples of LNA configurations and fallback modes are discussed with reference toFIGS.3through6.

FIGS.3A,3B, and3Cillustrate examples of receive chain configurations300that support techniques to configure LNA for DSDA user equipment in accordance with one or more aspects of the present disclosure. In some examples, the receive chain configurations300may be implemented by or may implement aspects of wireless communications system100or200, as described with reference toFIGS.1and2. In some examples, configurations illustrated inFIGS.3A through3Cmay be implemented by a transmitting device (e.g., a UE) that supports concurrent communication on multiple SIMs (e.g., with one or more cellular networks or WLANs), as described herein. The configurations may be implemented by a UE or its components as described herein, or may be performed by a modem, a chipset, and/or communications manager as discussed herein. In some examples, a UE or associated components 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.

FIG.3Ashows a first example receive chain configuration300-a, in which multiple SIMs may share a LNA architecture. In this example, RF components that are shared among multiple SIMs may include an antenna element305-a, a RF front end (RFFE)310-a, and an external LNA (eLNA)315-a. The eLNA315-amay be external to a radio component320-a(e.g., a radio portion of a wireless modem chip or chipset, which may provide a software defined radio (SDR)). An external LNA such as eLNA315-amay provide additional gain control that, when used in conjunction with one or more internal LNAs (ILNAs)325(e.g., first iLNA325-aand second iLNA325-b) within the radio component320-a, provides more versatile gain control and tolerance against cross-SIM imbalance. In this example, an output of eLNA315-amay be split and provided to separate RF chains associated with different SIMs (e.g., a first RF chain for SUB1 and a second RF chain for SUB2). The first RF chain, in this example, includes first iLNA325-a, a first mixer330-a(e.g., that mixes the received signal with a local oscillator to generate a baseband signal), a first baseband filter (BBF)335-a, and a first analog-to-digital converter (ADC)340-a, which may be provided in radio component320-a(e.g., in a SDR). The first RF chain may also include a wideband (WB) filter345-aand a narrowband (NB) filter350-a. The second RF chain associated with the second SIM may include second iLNA325-b, a second mixer330-b, a second BBF335-b, and a second ADC340-b, which may be provided in radio component320-a(e.g., in a SDR). The second RF chain may also include a WB filter345-band a NB filter350-b.

In other examples, an external LNA may not be present, and the output of an internal LNA may be split for different receive chains associated with different SIMs.FIG.3Bshows an example of such a receive chain configuration300-b. In this example, RF components that are shared among multiple SIMs again may include an antenna element305-band a RFFE310-b, which may be external to a radio component320-b(e.g., a radio portion of a wireless modem chip or chipset, which may provide a SDR). In this example, an iLNA325-cmay receive the signal from the RFFE310-b, and an output of the iLNA325-cmay be split and provided to separate RF chains associated with different SIMs (e.g., a first RF chain for SUB1 and a second RF chain for SUB2). The first RF chain, in this example, a first mixer330-c, a first BBF335-c, and a first ADC340-c, which may be provided in radio component320-b(e.g., in a SDR). The first RF chain may also include a WB filter345-cand a NB filter350-c. The second RF chain associated with the second SIM may include a second mixer330-d, a second BBF335-d, and a second ADC340-d, which may be provided in radio component320-b(e.g., in a SDR). The second RF chain may also include a WB filter345-dand a NB filter350-d.

FIG.3Cshows an example of a default receive chain configuration300-c. In this example, signals from LNAs may not be split for different SIMs and all RF components of the receive chain may be shared among multiple SIMs, or the UE may downgrade to operation on only one SIM (e.g., in the case of severe imbalance, one SIM may be disabled, such as a lower priority SIM). Similarly as the other examples ofFIGS.3A and3B, the RF components may include an antenna element305-c, a RFFE310-c, and an eLNA315-b, which may be external to a radio component320-c(e.g., a radio portion of a wireless modem chip or chipset, which may provide a SDR). In this example, an iLNA325-dmay receive the signal from the RFFE310-band provide an amplified signal to a mixer330-e, a BBF335-e, and an ADC340-e, which may be provided in radio component320-c(e.g., in a SDR). The RF chain of this example may also include a WB filter345-eand a NB filter350-e.

In some cases, a UE may configure or reconfigure the radio component320based on an amount of imbalance in received signal strength between different SIMs. As discussed herein, in cases where the imbalance is relatively high (e.g., exceeds a first threshold value, such as 10 dB), the radio component may be configured to provide a split in which signals from different LNAs (e.g., eLNA(s)315, iLNA(s)325, or any combinations thereof) may be split for processing associated with a particular SIM. In some cases, a UE may not include external LNAs, and received signal may be split at an iLNA325(e.g., as illustrated in the receive chain configuration300-b). Thus, LNA configurations may be selected and updated based on the imbalance in received signal strength, which may enhance throughput and reliability by allowing more reliable signal processing of lower strength signals. Further, in some cases, LNA configuration may be based on a service priority associated with a SIM. For example, a high service priority SIM may be used for higher priority communications such as voice communications (e.g., VoNR) and have a weaker RSSI, and a lower service priority SIM may be used for lower priority communications (e.g., mobile broadband data communications that are relatively time insensitive) and have a stronger RSSI. In cases where each SIM uses a same band (e.g., intra-band or co-band DSDA), techniques such as discussed herein may provide configuration flexibility to enhance communications of the multiple SIMs while using shared RF components for the SIMs. In some cases, a hybrid scheme may be present, in which some receive paths may have an associated eLNA315and the output may be split for different SIMs, while other receive paths may have only an iLNA325which may have its output split for different SIMs. Examples of different LNA configurations and control techniques are discussed with reference toFIGS.4through6.

FIGS.4A and4Billustrates an example of a LNA control configurations400that supports techniques to configure LNA for DSDA user equipment in accordance with one or more aspects of the present disclosure. In some examples, the LNA control configurations400may be implemented by or may implement aspects of wireless communications system100or200, as described with reference toFIGS.1and2. In some examples, configurations illustrated inFIGS.4A and4Bmay be implemented by a transmitting device (e.g., a UE) that supports concurrent communication on multiple SIMs (e.g., with one or more cellular networks or WLANs) using receive chain configurations such as illustrated inFIGS.3A through3C, as described herein. The LNA control configurations may be implemented by a UE or its components as described herein, or may be performed by a modem, a chipset, and/or communications manager as discussed herein. In some examples, a UE or associated components 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.

In the example ofFIG.4A, a first LNA control configuration400-amay provide an eLNA420-asplit, in which an amplified signal from eLNA420-ais split for a first RF chain410-aassociated with a first SIM and a second RF chain415-aassociated with a second SIM. In this example, the first RF chain may include an iLNA425-a, a mixer430-a, and a BBF435-athat are each associated with the first SIM. Likewise, the second RF chain may include an iLNA425-b, a mixer430-b, and a BBF435-bthat are each associated with the second SIM. As discussed herein, components of the RF chains410-aand415-amay be implemented in a radio component405-a(e.g., a radio portion of a wireless modem chip or chipset, which may provide a SDR). In this example, the first SIM may have control to set automatic gain control (AGC) settings for the eLNA420-a, as well as control to set AGC and parameters for other of the RF components of the first RF chain410-a. The second SIM may have control to set AGC for the iLNA425-band parameters for other components of the second RF chain415-a(e.g., BBF435-b). In some cases, the SIM having stronger RSSI measurements may be set to be the first SIM, such that AGC settings of the eLNA420-aare not saturated for the first SIM. In other cases, the SIM having higher priority communications may be set to be the first SIM.

In the example ofFIG.4B, separate iLNAs may not be available for an antenna port associated with the received signal, and a second LNA control configuration400-bmay provide an iLNA455split, in which an amplified signal from iLNA455is split for a first RF chain410-bassociated with a first SIM and a second RF chain415-bassociated with a second SIM. In this example, an eLNA420-bmay be present and the first RF chain410-bmay include iLNA455, a mixer430-c, and a BBF435-cthat are each associated with the first SIM. Likewise, the second RF chain may include a mixer430-d, and a BBF435-dthat are each associated with the second SIM.

As discussed herein, components of the RF chains410-band415-bmay be implemented in a radio component405-b(e.g., a radio portion of a wireless modem chip or chipset, which may provide a SDR). In this example, the first SIM may have control to set automatic gain control (AGC) settings for the eLNA420-b, as well as control to set AGC for iLNA455and parameters for other of the RF components of the first RF chain410-b. The second SIM may have control to set parameters for other components of the second RF chain415-a(e.g., BBF435-d). In some cases, the SIM having stronger RSSI measurements may be set to be the first SIM, such that AGC settings of the eLNA420-bare not saturated for the first SIM. In other cases, the SIM having higher priority communications may be set to be the first SIM.

In some cases, iLNA vs eLNA splits such as illustrated in first LNA control configuration400-amay provide enhanced performance due to different gain control and dynamic tuning range. For example, the eLNA420may provide a range of >20 dB, and the iLNA(s)425and455may provide a range of 6 dB. In some cases, if a signal strength delta between the SUBs is relatively large, the weaker SIM may need a higher gain tuning range that an iLNA425and455may not be able to provide. In one example, SIMs with a 30 dB imbalance using the first LNA control configuration400-amay use splitting at eLNA420-aand have a 6 dB better peak signal to noise ratio (SNR), and with a 10 dB imbalance a peak SNR delta may be reduced to about 3 dB. In cases with relatively low imbalance (e.g., OdB), ILNA splitting may provide peak SNR that is about same as eLNA (or even slightly better due to noise figure loss in eLNA split). Thus, in some examples, different LNA configuration fallback modes may be selected based on a difference or imbalance in signal strengths for each SIM. Examples of such fallback modes are illustrated inFIGS.5and6.

FIG.5illustrates an example of a fallback modes500that supports techniques to configure LNA for DSDA user equipment in accordance with one or more aspects of the present disclosure. In some examples, the fallback modes500may be implemented by or may implement aspects of wireless communications system100or200, as described with reference toFIGS.1and2. In some examples, fallback modes illustrated inFIG.5may be implemented by a transmitting device (e.g., a UE) that supports concurrent communication on multiple SIMs (e.g., with one or more cellular networks or WLANs) using receive chain configurations such as illustrated inFIGS.3Athrough3C andFIGS.4A and4B, as described herein. The fallback modes500may be implemented by a UE or its components as described herein, or may be performed by a modem, a chipset, and/or communications manager as discussed herein. In some examples, a UE or associated components 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.

In the example ofFIG.5, a default mode505may provide that each of a first SIM (SIM-1) and a second SIM (SIM-2) use each available receive antenna port and associated RF path (Rx0 through Rx3) using shared RF components associated with each antenna port, in which the SIM with a stronger signal strength controls AGC settings (e.g., SIM-2 in this example controls ACG). Such a default mode505may be used in cases where an imbalance in signal strengths between SIMs is relatively low (e.g., <10 dB). In this example, a first fallback mode510(fallback mode 1) may provide that the first SIM (SIM-1) controls AGC settings associated with a first subset of antenna ports and associated RF paths (e.g., Rx1 and Rx3), and the second SIM (SIM-2) controls AGC settings associated with a second subset of antenna ports and associated RF paths (e.g., Rx0 and Rx2). In the first fallback mode510, each RF path may be active for each SIM.

Continuing with the example ofFIG.5, a second fallback mode515(fallback mode 2) may provide that each SIM controls AGC for different subsets of antenna ports and associated RF paths, and one or both SIMs may inactivate one or more RF paths. In a first example of the second fallback mode515-a, the first SIM (SIM-1) controls AGC settings associated with a first subset of antenna ports and associated RF paths (e.g., Rx1 and Rx3), and the second SIM (SIM-2) controls AGC settings associated with a second subset of antenna ports and associated RF paths (e.g., Rx0 and Rx2). In the first example of the second fallback mode515-a, each RF path may be active for the first SIM, and the non-controlled RF paths for the second SIM may be deactivated or blanked by the second SIM. In the second example of the second fallback mode515-b, each SIM may deactivate or blank non-controlled RF paths.

In accordance with various aspects, a UE may select a LNA configuration using one of the modes such as illustrated inFIG.5, in which LNAs (e.g., iLNAs and/or eLNAs) may be split or shared between SIMs based on an available hardware configuration that supports split or shared LNAs (eLNA and/or iLNA) and a fallback algorithm. In some cases, in a default shared LNA mode such as illustrated in default mode505, the SIM with stronger received signals (e.g., SIM-2 in the example ofFIG.5which has higher RSSI values than SIM-1 for one or more measured reference signals) drives the LNAs. Such a technique may enhance overall throughput with relatively low risk of LNA saturation. In some cases, when the default mode505is selected, the SNR of each SIM may be thermal dominated, and reciprocal mixing may be used at low offsets of RSSIs at each SIM.

In other cases, a fallback mode may be selected in which a SIM with weaker received signals (e.g., SIM-1 in the example ofFIG.5which has lower RSSI values than SIM-1 for one or more measured reference signals) may drive at least a subset of the LNAs. In this example, the first fallback mode510may provide that AGC control on two RF paths (R×1 and R×3) are driven by the SIM with weaker received signals (e.g., SIM-2), and both SIMs may continue to use all RF paths for receive processing. Such a technique may result in saturation at one or more ADCs associated with the stronger SIM (e.g., SIM-1) for one or more RF path of the subset of LNAs that are controlled by the weaker sim (e.g., SIM-2). In some cases, the first fallback mode510may be used when a RSSI difference between SIMs exceeds a first threshold value (e.g., RSSI difference is greater than 10 dB). Using such a fallback mode may provide, for example, a fallback SNR for the first SIM of about 10 dB due to a lower thermal level, and may result in saturation of an ADC associated with the second SIM when a receive signal power is greater than −46 dBm. This technique may also risk saturation of an ADC associated with the second SIM if the second SIM SNR is 35 dB or more.

In the second fallback mode515, the SIM with weaker signals may drive at least a subset of the LNAs (e.g., LNAs associated with Rx1 and Rx3), and the SIM with stronger signals may blank the baseband signal for each RF path associated with the subset of LNAs (e.g., Rx1 and Rx3). For example, in the first example of the second fallback mode515-a, the stronger SIM may perform a RF level tune-away for RF paths associated with the subset of LNAs that are controlled by the weaker SIM. In some cases, one or more RSSI measurements of the stronger SIM may be frozen while the fallback algorithm operates in accordance with the second fallback mode515based on the RSSI delta between SIMs. In other examples, such as the second example of the second fallback mode515-b, both SIMs may blank the baseband signal for each RF path that is not controlled by that SIM. Such techniques may avoid saturation for RF paths of the stronger SIM and reduce interference in RF paths of the weaker SIM. In some cases, the second fallback mode515may be used when a RSSI difference between SIMs exceeds a second threshold value (e.g., RSSI difference is greater than 30 dB or 35 dB for the first or second example of the second fallback mode). In some cases, the second fallback mode515may be used subsequent to a transition to the first fallback mode510, or may be entered directly from the default mode505, based on RSSI difference threshold values. Thus, in some cases, a UE may transmission between different LNA configuration modes, and an example of LNA configuration mode states and transitions between different states is illustrated inFIG.6.

FIG.6illustrates an example of a state diagram600of fallback modes that supports techniques to configure LNA for DSDA user equipment in accordance with one or more aspects of the present disclosure. In some examples, the state diagram600may be implemented by or may implement aspects of wireless communications system100or200, as described with reference toFIGS.1and2. In some examples, state diagram600and fallback modes illustrated inFIG.6may be implemented by a transmitting device (e.g., a UE) that supports concurrent communication on multiple SIMs (e.g., with one or more cellular networks or WLANs) using receive chain configurations such as illustrated inFIGS.3A through3CandFIGS.4A and4B, as described herein. The state diagram600may be implemented by a UE or its components as described herein, or may be performed by a modem, a chipset, and/or communications manager as discussed herein. In some examples, a UE or associated components 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.

In the example ofFIG.6, different states may be associated with a default mode605, a first fallback mode610, and a second fallback mode615. Based on a difference in received signal strengths (e.g., RSSI) at each SIM, the UE may transition between different states. For example, the UE may perform a transition620from the default mode605to the first fallback mode610at time T1655based on a RSSI delta650between SIMs exceeding a first threshold value (e.g., 10 dB). In the event that the RSSI delta650drops below the first threshold value or below an offset associated with the first threshold value, the UE may perform a transition625to the default mode605. When operating in the first fallback mode610, the UE may perform a transition630from the first fallback mode610to the second fallback mode615at time T2660based on the RSSI delta650exceeding a second threshold value (e.g., 30 dB). In the event that the RSSI delta650drops below the second threshold value (or an offset associated with the second threshold value) and remains above the first threshold value, the UE may perform a transition635to the first fallback mode610. Further, the UE may perform a transition640from the default mode605directly to the second fallback mode615, or perform a transition645from the second fallback mode615directly to the default mode605, based on the RSSI delta650.

In some cases, one or more state transition rules may be defined for switching LNA configuration techniques. For example, transitions between the default mode605and the first fallback mode610may be defined in RF software, and transitions between the default mode605and the second fallback mode615, or between the first fallback mode610and the second fallback mode615, may be defined in RF software and in an interface between radio components and one or more external components. When operating in one of the fallback modes, the UE may perform antenna allocation based on one or more rules. In some cases, when operating in the first fallback mode610, antenna allocation and the RF path AGC control for the antenna paths with highest RSSI deltas may be provided to the lower service priority SIM. Further, the RF path AGC control for the remaining antenna paths with may be provided to the higher service priority SIM. For the second fallback mode615, for each antenna chain, the path corresponding to the lower RSSI delta SIM may be allocated to the higher priority service SIM. Further, for each antenna path, the path associated to the higher RSSI delta SIM may be allocated to the lower service priority SIM. In some cases, when operating in a fallback mode, the UE may not change the receive RF path allocation until the fallback mode is exited and the default mode605is resumed (e.g., even in the event of per SIM priority change).

As discussed herein, LNA configurations may be selected based on signal strengths of different SIMs that operate in using DSDA. In some cases, the SIM with stronger signals may risk saturation in the RF path due to a relatively small signal margin before BBF, and the associated AGC may prevent saturation at the associated ADC with no visibility into upstream BBF. In such cases, with no RF saturation, the first fallback mode610may provide higher baseband throughput, however operation in such a mode may reduce flexibility for antenna switching diversity (AsDIV), and the UE may be more susceptible to call drops due to hand blocking, for example. In some cases, in the RF path, a BBF gain adjustment may be used for split iLNA configurations, and wide adjustment ranges (e.g., more than 6 dB) may incur insertion loss.

In some cases, different SIMs may coordinate on physical to logical antenna mapping. For example, the SIMs may coordinate to map a higher service priority SIM to RF paths and associated antennas that have a smaller imbalance between SIMs. Additionally, or alternatively, the SIMs may coordinate to map a lower service priority SIM to RF paths and associated antennas that that have a larger imbalance. In some cases, AsDIV switching may use the same mapping (e.g., every 640 ms AsDIV is evaluated (although antenna receive diversity switching may be at 20 ms), and AsDIV may update the mapped RF paths and antennas). In some cases, a fallback mode may not interrupt, override, or affect AsDIV operations. In cases where an antenna and associated RF path is off or blanked by a SIM, transmission of one or more sounding reference signal (SRS) may be suspended. Service priority may be determined based on information provided from a communications manager. In some cases, when establishing connections, combined AGC leverage may be used for the complete flow, where both SIMs may be commonly scouted together, and the total RSSI may be determined based on RSSIs of each SIM. In some cases, timing of communications for each SIM may be synchronized, and timing may be driven by the higher service priority SIM.

In some cases, when using a hybrid LNA sharing configuration, in some band combinations a receive chain AGC may account for different AGC determination methods for separate subsets of RF paths. For example, a first subset of RF paths (e.g., Rx0, Rx1) may be driven by separate LNAs in different SIMs and a second subset of RF paths (e.g., Rx2, Rx3) may be driven by the same shared LNA for a different SIM, and the AGC control may account for the particular LNA configuration. In some cases, desense and blanking schemes for timing drift protection may be leveraged across SIMs in different fallback modes.

In some cases, different SIMs may enter and exit a sleep mode based on particular configurations associated with the SIMs. In some cases, if one SIM enters a sleep mode, the other SIM may assume control of LNAs controlled by the SIM that entered sleep mode (during which time, a hysteresis buffer associated with the SIM in sleep mode may be frozen). In some cases, timing drift and TDD configuration mismatch (e.g., co-existence protection) may be accounted for when operating in fallback modes. In some cases, risk of hardware (e.g., LNA) damage may be reduced by receive/transmit blanking on a SIM (e.g., to prevent damage due to a TDD configuration mismatch). In some cases, no TDD configuration mismatch detection or override may be implemented in DSDA operation, and a maximum transmit power limit (MTPL) backoff may be tentative. In some case, a SIM may reduce an ADC set point based on a frequency offset with respect to the stronger SIM (e.g., due to inability to detect saturation post BBF), and set point control may be set based on an ADC bias parameter that is set for the UE.

Thus, in accordance with various aspects discussed herein, a UE may enter a fallback mode based on a received signal imbalance condition between SIMs. In some cases, the imbalance condition may be based on a configured maximum RSSI delta as the difference between maximum RSSI among RF paths for each SIM. If the maximum RSSI delta is greater than a configurable low or first threshold value (e.g., 10 dB), a condition 1 flag may be set. If the maximum RSSI delta is greater than a configurable high or second threshold value (e.g., 20 dB) a condition 2 flag may be set. Based on the imbalance condition, the UE may enter a fallback procedure. In some cases, the fallback procedure may be entered based on a sliding window hysteresis conditioned on the flag inputs. A FIFO buffer may be defined, that accumulates condition 1 and condition 2 met instances over a window length, and if the enter condition 1 is met for l times during a duration of m slots, the UE may enter the fallback mode 1. If the enter condition 2 is met for l times during a duration of m slots, the UE may enter the fallback mode 2 (e.g., l=8 and m=16).

In some cases, to exit the fallback mode (e.g., return to the default mode), the UE may detect a balanced condition. For example, the UE may use measure differences in RF paths (e.g., may use Rx0/Rx1 RSSI measurements to estimate imbalance on Rx2/Rx3 and vice versa). If the maximum RSSI delta is less than a configurable value (e.g., 6 dB), the UE may set an exit condition. In some cases, the exit fallback procedure may use a sliding window hysteresis on the exit condition. For example, a FIFO buffer may be defined and accumulate exit condition met instances over a window length. If the exit condition met for n times during a duration of m slots, the UE may exit the fallback mode (e.g., switch back to shared iLNA with all RF paths, such as buy using n=16 and m=32).

FIG.7illustrates a block diagram700of a device705that supports techniques to configure LNA for DSDA user equipment in accordance with one or more aspects of the present disclosure. The device705may be an example of aspects of a UE115as described herein. The device705may include a receiver710, a transmitter715, and a communications manager720. The device705may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses).

The communications manager720, the receiver710, the transmitter715, or various combinations thereof or various components thereof may be examples of means for performing various aspects of techniques to configure LNA for DSDA user equipment as described herein. For example, the communications manager720, the receiver710, the transmitter715, 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 manager720may be configured to perform various operations (e.g., receiving, obtaining, monitoring, outputting, transmitting) using or otherwise in cooperation with the receiver710, the transmitter715, or both. For example, the communications manager720may receive information from the receiver710, send information to the transmitter715, or be integrated in combination with the receiver710, the transmitter715, or both to obtain information, output information, or perform various other operations as described herein.

The communications manager720may support wireless communication at a UE in accordance with examples as disclosed herein. For example, the communications manager720may be configured as or otherwise support a means for establishing a first communications link via two or more antenna ports using a first SIM of the UE in a DSDA mode. The communications manager720may be configured as or otherwise support a means for establishing a second communications link via the two or more antenna ports using a second SIM of the UE in the DSDA mode, the DSDA mode for receiving concurrent communications for at least the first SIM and the second SIM via the two or more antenna ports of the UE, the concurrent communications including first communications using the first SIM and second communications using the second SIM. The communications manager720may be configured as or otherwise support a means for identifying a LNA configuration from two or more available LNA configurations for receiving each of the first communications and the second communications based on activation of the DSDA mode, the identifying based on a difference between a first received signal strength associated with the first communications and a second received signal strength associated with the second communications. The communications manager720may be configured as or otherwise support a means for receiving the first communications and the second communications via the two or more antenna ports based on the identified LNA configuration.

By including or configuring the communications manager720in accordance with examples as described herein, the device705(e.g., a processor controlling or otherwise coupled with the receiver710, the transmitter715, the communications manager720, or a combination thereof) may support techniques for LNA configuration in DSDA operations in which different SIMs have different received signal strengths. Such techniques may provide for efficient communications at the UE based on signal strength differences of the SIMs, which may allow for a UE to set gain control for different SIMs based on current conditions at each SIM. Such techniques may thus enhance UE efficiency, increase data rates, enhance reliability at each SIM, and provide for enhanced user experience.

FIG.8illustrates a block diagram800of a device805that supports techniques to configure LNA for DSDA user equipment in accordance with one or more aspects of the present disclosure. The device805may be an example of aspects of a device705or a UE115as described herein. The device805may include a receiver810, a transmitter815, and a communications manager820. The device805may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses).

The device805, or various components thereof, may be an example of means for performing various aspects of techniques to configure LNA for DSDA user equipment as described herein. For example, the communications manager820may include a DSDA manager825, an LNA configuration manager830, a DL communication manager835, or any combination thereof. The communications manager820may be an example of aspects of a communications manager720as described herein. In some examples, the communications manager820, or various components thereof, may be configured to perform various operations (e.g., receiving, obtaining, monitoring, outputting, transmitting) using or otherwise in cooperation with the receiver810, the transmitter815, or both. For example, the communications manager820may receive information from the receiver810, send information to the transmitter815, or be integrated in combination with the receiver810, the transmitter815, or both to obtain information, output information, or perform various other operations as described herein.

The communications manager820may support wireless communication at a UE in accordance with examples as disclosed herein. The DSDA manager825may be configured as or otherwise support a means for establishing a first communications link via two or more antenna ports using a first SIM of the UE in a DSDA mode. The DSDA manager825may be configured as or otherwise support a means for establishing a second communications link via the two or more antenna ports using a second SIM of the UE in the DSDA mode, the DSDA mode for receiving concurrent communications for at least the first SIM and the second SIM via the two or more antenna ports of the UE, the concurrent communications including first communications using the first SIM and second communications using the second SIM. The LNA configuration manager830may be configured as or otherwise support a means for identifying a LNA configuration from two or more available LNA configurations for receiving each of the first communications and the second communications based on activation of the DSDA mode, the identifying based on a difference between a first received signal strength associated with the first communications and a second received signal strength associated with the second communications. The DL communication manager835may be configured as or otherwise support a means for receiving the first communications and the second communications via the two or more antenna ports based on the identified LNA configuration.

FIG.9illustrates a block diagram900of a communications manager920that supports techniques to configure LNA for DSDA user equipment in accordance with one or more aspects of the present disclosure. The communications manager920may be an example of aspects of a communications manager720, a communications manager820, or both, as described herein. The communications manager920, or various components thereof, may be an example of means for performing various aspects of techniques to configure LNA for DSDA user equipment as described herein. For example, the communications manager920may include a DSDA manager925, an LNA configuration manager930, a DL communication manager935, a signal measurement manager940, a configuration selection manager945, a receive chain manager950, an AGC manager955, a fallback state manager960, 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 manager920may support wireless communication at a UE in accordance with examples as disclosed herein. The DSDA manager925may be configured as or otherwise support a means for establishing a first communications link via two or more antenna ports using a first SIM of the UE in a DSDA mode. In some examples, the DSDA manager925may be configured as or otherwise support a means for establishing a second communications link via the two or more antenna ports using a second SIM of the UE in the DSDA mode, the DSDA mode for receiving concurrent communications for at least the first SIM and the second SIM via the two or more antenna ports of the UE, the concurrent communications including first communications using the first SIM and second communications using the second SIM. The LNA configuration manager930may be configured as or otherwise support a means for identifying a LNA configuration from two or more available LNA configurations for receiving each of the first communications and the second communications based on activation of the DSDA mode, the identifying based on a difference between a first received signal strength associated with the first communications and a second received signal strength associated with the second communications. The DL communication manager935may be configured as or otherwise support a means for receiving the first communications and the second communications via the two or more antenna ports based on the identified LNA configuration.

In some examples, to support identifying the LNA configuration, the signal measurement manager940may be configured as or otherwise support a means for measuring the first received signal strength associated with the first communications and the second received signal strength associated with the second communications to determine a difference between the first received signal strength and the second received signal strength. In some examples, to support identifying the LNA configuration, the configuration selection manager945may be configured as or otherwise support a means for selecting, responsive to the difference between the first received signal strength and the second received signal strength being less than or equal to a first threshold value, a first LNA configuration in which each of the first SIM and the second SIM use each of a set of multiple LNAs associated with a set of antenna ports that receive both the first communications and the second communications. In some examples, to support identifying the LNA configuration, the configuration selection manager945may be configured as or otherwise support a means for selecting, responsive to the difference between the first received signal strength and the second received signal strength exceeding the first threshold value, a second LNA configuration in which the first SIM controls a first subset of LNAs associated with a first subset of the set of antenna ports, and the second SIM controls a second subset of LNAs associated with a second subset of the set of antenna ports.

In some examples, the first subset of LNAs and the second subset of LNAs are determined based on a magnitude of the difference between the first received signal strength and the second received signal strength. In some examples, the first SIM controls a gain of each of the set of multiple LNAs in the first LNA configuration. In some examples, the first SIM controls a gain of each of the first subset of LNAs, and the second SIM controls the gain of each of the second subset of LNAs, in the second LNA configuration.

In some examples, the first SIM uses signals from each antenna port of the first subset of antenna ports and the second subset of antenna ports for receiving the first communications when the second LNA configuration is selected. In some examples, the first SIM does not use any of the antenna ports of the second subset of antenna ports for receiving the first communications when the second LNA configuration is selected.

In some examples, the first SIM does not use any of the antenna ports of the second subset of antenna ports for receiving the first communications when the second LNA configuration is selected, and the second SIM does not use any of the antenna ports of the first subset of antenna ports for receiving the second communications when the second LNA configuration is selected. In some examples, the identified LNA configuration provides for control of a set of multiple LNAs at the UE, the set of multiple LNAs include two or more internal LNAs that are internal to a wireless modem of the UE and two or more external LNAs that are external to the wireless modem of the UE.

In some examples, radio frequency signals from each of the two or more external LNAs are split and provided to respective first internal LNAs associated with the first SIM and second internal LNAs associated with the second SIM. In some examples, radio frequency signals from each of the two or more external LNAs are provided to an associated internal LNA, and an output from each of the two or more internal LNAs are split and provided to separate processing chains associated with the first SIM and the second SIM. In some examples, the first SIM controls an automatic gain control for at least a first subset of the set of multiple LNAs, and the second SIM controls the automatic gain control for at least a second subset of the set of multiple LNAs, and where a timing for updating the automatic gain control is based on which of the first SIM or the second SIM controls the associated LNA.

In some examples, to support identifying the LNA configuration, the signal measurement manager940may be configured as or otherwise support a means for determining that the difference between a first received signal strength associated with the first communications and a second received signal strength associated with the second communications exceeds a threshold value. In some examples, to support identifying the LNA configuration, the AGC manager955may be configured as or otherwise support a means for selecting, responsive to the determining, a LNA configuration in which the first SIM controls at least one of the two or more internal LNAs and at least one of the two or more external LNAs, and in which the second SIM controls at least one of the two or more internal LNAs. In some examples, the threshold value is based on a gain control or dynamic tuning range of the two or more internal LNAs.

In some examples, the DL communication manager935may be configured as or otherwise support a means for determining that the first SIM has a higher priority than the second SIM. In some examples, the receive chain manager950may be configured as or otherwise support a means for mapping a first subset of the two or more antenna ports to the first SIM based on the higher priority of the first SIM, and where the LNA configuration is based on the mapping.

In some examples, to support receiving, the DL communication manager935may be configured as or otherwise support a means for setting one or more analog-to-digital converter (ADC) parameters for the first communications based on a frequency offset between the first communications and the second communications when the first communications have a stronger signal strength than the second communications.

In some examples, the identifying includes identifying a first LNA configuration based on the difference between the first received signal strength and the second received signal strength being less than or equal to a first threshold value. In some examples, the signal measurement manager940may be configured as or otherwise support a means for determining, subsequent to identifying the first LNA configuration, that the difference between the first received signal strength and the second received signal strength exceeds the first threshold value. In some examples, the identifying includes identifying a first LNA configuration based on the difference between the first received signal strength and the second received signal strength being less than or equal to a first threshold value, the first LNA configuration providing that each SIM uses each antenna port. In some examples, the selection manager945may be configured as or otherwise support a means for selecting a second LNA configuration responsive to the determining, where the second LNA configuration provides that the first SIM controls a first subset of LNAs associated with a first subset of the two or more antenna ports, and the second SIM controls a second subset of LNAs associated with a second subset of the two or more antenna ports.

In some examples, the identifying includes identifying a first LNA configuration based on the difference between the first received signal strength and the second received signal strength being less than or equal to a first threshold value, the first LNA configuration providing that each SIM uses each antenna port. In some examples, the receive chain manager950may be configured as or otherwise support a means for receiving the first communications via the first subset of antenna ports using the first subset of LNAs. In some examples, the identifying includes identifying a first LNA configuration based on the difference between the first received signal strength and the second received signal strength being less than or equal to a first threshold value, the first LNA configuration providing that each SIM uses each antenna port. In some examples, the receive chain manager950may be configured as or otherwise support a means for receiving the second communications via the second subset of antenna ports using the second subset of LNAs.

In some examples, the difference between the first received signal strength and the second received signal strength is determined based on filtered received signal strength indicators (RSSIs) in a sliding window, the filtered RSSIs associated with the first communications and the second communications. In some examples, to support determining, the signal measurement manager940may be configured as or otherwise support a means for determining that the difference between the first received signal strength and the second received signal strength exceeds the first threshold value on a predetermined number of occasions within a predetermined time period.

In some examples, the signal measurement manager940may be configured as or otherwise support a means for determining, subsequent to the selection of the second LNA configuration, that the difference between the first received signal strength and the second received signal strength is less than or equal to a second threshold value. In some examples, the configuration selection manager945may be configured as or otherwise support a means for selecting the first LNA configuration responsive to the determining that the difference between the first received signal strength and the second received signal strength is less than or equal to a second threshold value. In some examples, the DL communication manager935may be configured as or otherwise support a means for receiving the first communications and the second communications via the two or more antenna ports based on the first LNA configuration. In some examples, the second threshold value is less than the first threshold.

In some examples, the first SIM controls a set of multiple LNAs in the first LNA configuration during periods in which the first SIM is not in a sleep mode, and the second SIM controls the set of multiple LNAs in the first LNA configuration during periods in which the first SIM is in the sleep mode. In some examples, the first SIM suspends communications during one or more slots based on a timing drift associated with the first communications or a TDD configuration mismatch between the first communications and the second communications.

In some examples, a first LNA configuration of the two or more available LNA configurations is identified for receiving the first communications and the second communications based on the difference between the first received signal strength and the second received signal strength being less than or equal to a first threshold value, the first LNA configuration providing that each SIM uses each antenna port and associated LNAs for receiving the respective first and second communications. In some examples, gain control for each of the associated LNAs is controlled by the first SIM when the first received signal strength exceeds the second received signal strength.

In some examples, to support identifying, the fallback state manager960may be configured as or otherwise support a means for identifying a first LNA configuration responsive to the UE being in a first state in which the difference between the first received signal strength and the second received signal strength is less than or equal to a first threshold value and each SIM uses each of the two or more antenna ports for the concurrent communications. In some examples, to support identifying, the fallback state manager960may be configured as or otherwise support a means for identifying a second LNA configuration responsive to the UE being in a second state in which the difference between the first received signal strength and the second received signal strength exceeds the first threshold value, the second LNA configuration providing that one of the first SIM or the second SIM that has a lower service priority provides gain control for a first subset of the two or more antenna ports that have relatively larger differences in received signal strength and the other of the first SIM or the second SIM provides gain control for other antenna ports outside of the first subset of the two or more antenna ports. In some examples, to support identifying, the fallback state manager960may be configured as or otherwise support a means for identifying a third LNA configuration responsive to the UE being in a third state in which the difference between the first received signal strength and the second received signal strength exceeds a second threshold value that is greater than the first threshold value, the third LNA configuration providing that one of the first SIM or the second SIM that has a higher service priority uses only a first subset of the two or more antenna ports that have relatively smaller differences in received signal strength and the other of the first SIM or the second SIM uses only one or more other antenna ports outside of the first subset of the two or more antenna ports.

FIG.10illustrates a diagram of a system1000including a device1005that supports techniques to configure LNA for DSDA user equipment in accordance with one or more aspects of the present disclosure. The device1005may be an example of or include the components of a device705, a device805, or a UE115as described herein. The device1005may communicate (e.g., wirelessly) with one or more network entities105, one or more UEs115, or any combination thereof. The device1005may include components for bi-directional voice and data communications including components for transmitting and receiving communications, such as a communications manager1020, an input/output (I/O) controller1010, a transceiver1015, an antenna1025, a memory1030, code1035, and a processor1040. 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 bus1045).

The processor1040may 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 processor1040may be configured to operate a memory array using a memory controller. In some other cases, a memory controller may be integrated into the processor1040. The processor1040may be configured to execute computer-readable instructions stored in a memory (e.g., the memory1030) to cause the device1005to perform various functions (e.g., functions or tasks supporting techniques to configure LNA for DSDA user equipment). For example, the device1005or a component of the device1005may include a processor1040and memory1030coupled with or to the processor1040, the processor1040and memory1030configured to perform various functions described herein.

The communications manager1020may support wireless communication at a UE in accordance with examples as disclosed herein. For example, the communications manager1020may be configured as or otherwise support a means for establishing a first communications link via two or more antenna ports using a first SIM of the UE in a DSDA mode. The communications manager1020may be configured as or otherwise support a means for establishing a second communications link via the two or more antenna ports using a second SIM of the UE in the DSDA mode, the DSDA mode for receiving concurrent communications for at least the first SIM and the second SIM via the two or more antenna ports of the UE, the concurrent communications including first communications using the first SIM and second communications using the second SIM. The communications manager1020may be configured as or otherwise support a means for identifying a LNA configuration from two or more available LNA configurations for receiving each of the first communications and the second communications based on activation of the DSDA mode, the identifying based on a difference between a first received signal strength associated with the first communications and a second received signal strength associated with the second communications. The communications manager1020may be configured as or otherwise support a means for receiving the first communications and the second communications via the two or more antenna ports based on the identified LNA configuration.

By including or configuring the communications manager1020in accordance with examples as described herein, the device1005may support techniques for LNA configuration in DSDA operations in which different SIMs have different received signal strengths. Such techniques may provide for efficient communications at the UE based on signal strength differences of the SIMS, which may allow for a UE to set gain control for different SIMs based on current conditions at each SIM. Such techniques may thus enhance UE efficiency, increase data rates, enhance reliability at each SIM, and provide for enhanced user experience.

In some examples, the communications manager1020may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using or otherwise in cooperation with the transceiver1015, the one or more antennas1025, or any combination thereof. Although the communications manager1020is illustrated as a separate component, in some examples, one or more functions described with reference to the communications manager1020may be supported by or performed by the processor1040, the memory1030, the code1035, or any combination thereof. For example, the code1035may include instructions executable by the processor1040to cause the device1005to perform various aspects of techniques to configure LNA for DSDA user equipment as described herein, or the processor1040and the memory1030may be otherwise configured to perform or support such operations.

FIG.11illustrates a flowchart illustrating a method1100that supports techniques to configure LNA for DSDA user equipment in accordance with one or more aspects of the present disclosure. The operations of the method1100may be implemented by a UE or its components as described herein. For example, the operations of the method1100may be performed by a UE115as described with reference toFIGS.1through10. 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.

At1105, the method may include establishing a first communications link via two or more antenna ports using a first SIM of the UE in a DSDA mode. The operations of1105may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1105may be performed by a DSDA manager925as described with reference toFIG.9.

At1110, the method may include establishing a second communications link via the two or more antenna ports using a second SIM of the UE in the DSDA mode, the DSDA mode for receiving concurrent communications for at least the first SIM and the second SIM via the two or more antenna ports of the UE, the concurrent communications including first communications using the first SIM and second communications using the second SIM. The operations of1110may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1110may be performed by a DSDA manager925as described with reference toFIG.9.

At1115, the method may include identifying a LNA configuration from two or more available LNA configurations for receiving each of the first communications and the second communications based on activation of the DSDA mode, the identifying based on a difference between a first received signal strength associated with the first communications and a second received signal strength associated with the second communications. The operations of1115may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1115may be performed by an LNA configuration manager930as described with reference toFIG.9.

At1120, the method may include receiving the first communications and the second communications via the two or more antenna ports based on the identified LNA configuration. The operations of1120may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1120may be performed by a DL communication manager935as described with reference toFIG.9.

FIG.12illustrates a flowchart illustrating a method1200that supports techniques to configure LNA for DSDA user equipment in accordance with one or more aspects of the present disclosure. The operations of the method1200may be implemented by a UE or its components as described herein. For example, the operations of the method1200may be performed by a UE115as described with reference toFIGS.1through10. 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.

At1205, the method may include establishing a first communications link via two or more antenna ports using a first SIM of the UE in a DSDA mode. The operations of1205may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1205may be performed by a DSDA manager925as described with reference toFIG.9.

At1210, the method may include establishing a second communications link via the two or more antenna ports using a second SIM of the UE in the DSDA mode, the DSDA mode for receiving concurrent communications for at least the first SIM and the second SIM via the two or more antenna ports of the UE, the concurrent communications including first communications using the first SIM and second communications using the second SIM. The operations of1210may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1210may be performed by a DSDA manager925as described with reference toFIG.9.

At1215, the method may include measuring a first received signal strength associated with the first communications and a second received signal strength associated with the second communications to determine a difference between the first received signal strength and the second received signal strength. The operations of1215may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1215may be performed by a signal measurement manager940as described with reference toFIG.9.

At1220, the method may include selecting, responsive to the difference between the first received signal strength and the second received signal strength being less than or equal to a first threshold value, a first LNA configuration in which each of the first SIM and the second SIM use each of a plurality of multiple LNAs associated with a set of antenna ports that receive both the first communications and the second communications. The operations of1220may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1220may be performed by a configuration selection manager945as described with reference toFIG.9.

At1225, the method may include selecting, responsive to the difference between the first received signal strength and the second received signal strength exceeding the first threshold value, a second LNA configuration in which the first SIM controls a first subset of LNAs associated with a first subset of the set of antenna ports, and the second SIM controls a second subset of LNAs associated with a second subset of the set of antenna ports. The operations of1225may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1225may be performed by a configuration selection manager945as described with reference toFIG.9.

At1230, the method may include receiving the first communications and the second communications via the two or more antenna ports based on the selected LNA configuration. The operations of1230may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1230may be performed by a DL communication manager935as described with reference toFIG.9.

FIG.13illustrates a flowchart illustrating a method1300that supports techniques to configure LNA for DSDA user equipment in accordance with one or more aspects of the present disclosure. The operations of the method1300may be implemented by a UE or its components as described herein. For example, the operations of the method1300may be performed by a UE115as described with reference toFIGS.1through10. 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.

At1305, the method may include establishing a first communications link via two or more antenna ports using a first SIM of the UE in a DSDA mode. The operations of1305may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1305may be performed by a DSDA manager925as described with reference toFIG.9.

At1310, the method may include establishing a second communications link via the two or more antenna ports using a second SIM of the UE in the DSDA mode, the DSDA mode for receiving concurrent communications for at least the first SIM and the second SIM via the two or more antenna ports of the UE, the concurrent communications including first communications using the first SIM and second communications using the second SIM. The operations of1310may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1310may be performed by a DSDA manager925as described with reference toFIG.9.

At1315, the method may include determining that the difference between a first received signal strength associated with the first communications and a second received signal strength associated with the second communications exceeds a threshold value. The operations of1315may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1315may be performed by a signal measurement manager940as described with reference toFIG.9.

At1320, the method may include selecting, responsive to the determining, a LNA configuration in which the first SIM controls at least one of the two or more internal LNAs and at least one of the two or more external LNAs, and in which the second SIM controls at least one of the two or more internal LNAs. The operations of1320may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1320may be performed by an AGC manager955as described with reference toFIG.9. In some cases, the LNA configuration provides for control of a set of multiple LNAs at the UE, the set of multiple LNAs include two or more internal LNAs that are internal to a wireless modem of the UE and two or more external LNAs that are external to the wireless modem of the UE.

At1325, the method may include receiving the first communications and the second communications via the two or more antenna ports based on the identified LNA configuration. The operations of1325may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1325may be performed by a DL communication manager935as described with reference toFIG.9.

FIG.14illustrates a flowchart illustrating a method1400that supports techniques to configure LNA for DSDA user equipment in accordance with one or more aspects of the present disclosure. The operations of the method1400may be implemented by a UE or its components as described herein. For example, the operations of the method1400may be performed by a UE115as described with reference toFIGS.1through10. 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.

At1405, the method may include establishing a first communications link via two or more antenna ports using a first SIM of the UE in a DSDA mode. The operations of1405may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1405may be performed by a DSDA manager925as described with reference toFIG.9.

At1410, the method may include establishing a second communications link via the two or more antenna ports using a second SIM of the UE in the DSDA mode, the DSDA mode for receiving concurrent communications for at least the first SIM and the second SIM via the two or more antenna ports of the UE, the concurrent communications including first communications using the first SIM and second communications using the second SIM. The operations of1410may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1410may be performed by a DSDA manager925as described with reference toFIG.9.

At1415, the method may include identifying a LNA configuration from two or more available LNA configurations for receiving each of the first communications and the second communications based on activation of the DSDA mode, the identifying based on a difference between a first received signal strength associated with the first communications and a second received signal strength associated with the second communications. The operations of1415may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1415may be performed by an LNA configuration manager930as described with reference toFIG.9.

At1420, the method may include determining that the first SIM has a higher priority than the second SIM. The operations of1420may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1420may be performed by a DL communication manager935as described with reference toFIG.9.

At1425, the method may include mapping a first subset of the two or more antenna ports to the first SIM based on the higher priority of the first SIM, and where the LNA configuration is based on the mapping. The operations of1425may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1425may be performed by a receive chain manager950as described with reference toFIG.9.

At1430, the method may include receiving the first communications and the second communications via the two or more antenna ports based on the identified LNA configuration. The operations of1430may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1430may be performed by a DL communication manager935as described with reference toFIG.9.

FIG.15illustrates a flowchart illustrating a method1500that supports techniques to configure LNA for DSDA user equipment in accordance with one or more aspects of the present disclosure. The operations of the method1500may be implemented by a UE or its components as described herein. For example, the operations of the method1500may be performed by a UE115as described with reference toFIGS.1through10. 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.

At1505, the method may include establishing a first communications link via two or more antenna ports using a first SIM of the UE in a DSDA mode. The operations of1505may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1505may be performed by a DSDA manager925as described with reference toFIG.9.

At1510, the method may include establishing a second communications link via the two or more antenna ports using a second SIM of the UE in the DSDA mode, the DSDA mode for receiving concurrent communications for at least the first SIM and the second SIM via the two or more antenna ports of the UE, the concurrent communications including first communications using the first SIM and second communications using the second SIM. The operations of1510may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1510may be performed by a DSDA manager925as described with reference toFIG.9.

At1515, the method may include identifying a LNA configuration from two or more available LNA configurations for receiving each of the first communications and the second communications based on activation of the DSDA mode, the identifying based on a difference between a first received signal strength associated with the first communications and a second received signal strength associated with the second communications. The operations of1515may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1515may be performed by an LNA configuration manager930as described with reference toFIG.9.

At1520, the method may include setting one or more analog-to-digital converter (ADC) parameters for the first communications based on a frequency offset between the first communications and the second communications when the first communications have a stronger signal strength than the second communications. The operations of1520may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1520may be performed by a DL communication manager935as described with reference toFIG.9.

At1525, the method may include receiving the first communications and the second communications via the two or more antenna ports based on the identified LNA configuration. The operations of1525may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1525may be performed by a DL communication manager935as described with reference toFIG.9.

FIG.16illustrates a flowchart illustrating a method1600that supports techniques to configure LNA for DSDA user equipment in accordance with one or more aspects of the present disclosure. The operations of the method1600may be implemented by a UE or its components as described herein. For example, the operations of the method1600may be performed by a UE115as described with reference toFIGS.1through10. 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.

At1605, the method may include establishing a first communications link via two or more antenna ports using a first SIM of the UE in a DSDA mode. The operations of1605may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1605may be performed by a DSDA manager925as described with reference toFIG.9.

At1610, the method may include establishing a second communications link via the two or more antenna ports using a second SIM of the UE in the DSDA mode, the DSDA mode for receiving concurrent communications for at least the first SIM and the second SIM via the two or more antenna ports of the UE, the concurrent communications including first communications using the first SIM and second communications using the second SIM. The operations of1610may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1610may be performed by a DSDA manager925as described with reference toFIG.9.

At1615, the method may include identifying a first LNA configuration from two or more available LNA configurations for receiving each of the first communications and the second communications based on activation of the DSDA mode, the identifying based on a difference between a first received signal strength associated with the first communications and a second received signal strength associated with the second communications. The operations of1615may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1615may be performed by an LNA configuration manager930as described with reference toFIG.9.

At1620, the method may include determining, subsequent to identifying the first LNA configuration, that the difference between the first received signal strength and the second received signal strength exceeds the first threshold value. The operations of1620may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1620may be performed by a signal measurement manager940as described with reference toFIG.9.

At1625, the method may include selecting a second LNA configuration responsive to the determining, where the second LNA configuration provides that the first SIM controls a first subset of LNAs associated with a first subset of the two or more antenna ports, and the second SIM controls a second subset of LNAs associated with a second subset of the two or more antenna ports. The operations of1625may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1625may be performed by a configuration selection manager945as described with reference toFIG.9.

At1630, the method may include receiving the first communications via the first subset of antenna ports using the first subset of LNAs. The operations of1630may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1630may be performed by a receive chain manager950as described with reference toFIG.9.

At1635, the method may include receiving the second communications via the second subset of antenna ports using the second subset of LNAs. The operations of1635may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1635may be performed by a receive chain manager950as described with reference toFIG.9.

FIG.17illustrates a flowchart illustrating a method1700that supports techniques to configure LNA for DSDA user equipment in accordance with one or more aspects of the present disclosure. The operations of the method1700may be implemented by a UE or its components as described herein. For example, the operations of the method1700may be performed by a UE115as described with reference toFIGS.1through10. 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.

At1705, the method may include establishing a first communications link via two or more antenna ports using a first SIM of the UE in a DSDA mode. The operations of1705may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1705may be performed by a DSDA manager925as described with reference toFIG.9.

At1710, the method may include establishing a second communications link via the two or more antenna ports using a second SIM of the UE in the DSDA mode, the DSDA mode for receiving concurrent communications for at least the first SIM and the second SIM via the two or more antenna ports of the UE, the concurrent communications including first communications using the first SIM and second communications using the second SIM. The operations of1710may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1710may be performed by a DSDA manager925as described with reference toFIG.9.

At1715, the method may include identifying a first LNA configuration responsive to the UE being in a first state in which the difference between the first received signal strength and the second received signal strength is less than or equal to a first threshold value and each SIM uses each of the two or more antenna ports for the concurrent communications. The operations of1715may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1715may be performed by a fallback state manager960as described with reference toFIG.9.

At1720, the method may include identifying a second LNA configuration responsive to the UE being in a second state in which the difference between the first received signal strength and the second received signal strength exceeds the first threshold value, the second LNA configuration providing that one of the first SIM or the second SIM that has a lower service priority provides AGC for a first subset of the two or more antenna ports that have relatively larger differences in received signal strength and the other of the first SIM or the second SIM provides AGC for other antenna ports outside of the first subset of the two or more antenna ports. The operations of1720may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1720may be performed by a fallback state manager960as described with reference toFIG.9.

At1725, the method may include identifying a third LNA configuration responsive to the UE being in a third state in which the difference between the first received signal strength and the second received signal strength exceeds a second threshold value that is greater than the first threshold value, the third LNA configuration providing that one of the first SIM or the second SIM that has a higher service priority uses only a first subset of the two or more antenna ports that have relatively smaller differences in received signal strength and the other of the first SIM or the second SIM uses only one or more other antenna ports outside of the first subset of the two or more antenna ports. The operations of1725may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1725may be performed by a fallback state manager960as described with reference toFIG.9.

At1730, the method may include receiving the first communications and the second communications via the two or more antenna ports based on the identified LNA configuration. The operations of1730may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1730may be performed by a DL communication manager935as described with reference toFIG.9. The following provides an overview of aspects of the present disclosure:

Aspect 1: A method for wireless communication at a UE, comprising: establishing a first communications link via two or more antenna ports using a first SIM of the UE in a dual-subscriber dual-active mode; establishing a second communications link via the two or more antenna ports using a second SIM of the UE in the dual-subscriber dual-active mode, the dual-subscriber dual-active mode for receiving concurrent communications for at least the first SIM and the second SIM via the two or more antenna ports of the UE, the concurrent communications including first communications using the first SIM and second communications using the second SIM; identifying a low noise amplifier configuration from two or more available low noise amplifier configurations for receiving each of the first communications and the second communications based at least in part on activation of the dual-subscriber dual-active mode, the identifying based at least in part on a difference between a first received signal strength associated with the first communications and a second received signal strength associated with the second communications; and receiving the first communications and the second communications via the two or more antenna ports based at least in part on the identified low noise amplifier configuration.

Aspect 2: The method of aspect 1, wherein the identifying the low noise amplifier configuration comprises: measuring the first received signal strength associated with the first communications and the second received signal strength associated with the second communications to determine a difference between the first received signal strength and the second received signal strength; selecting, responsive to the difference between the first received signal strength and the second received signal strength being less than or equal to a first threshold value, a first low noise amplifier configuration in which each of the first SIM and the second SIM use each of a plurality of low noise amplifiers associated with a set of antenna ports that receive both the first communications and the second communications; and selecting, responsive to the difference between the first received signal strength and the second received signal strength exceeding the first threshold value, a second low noise amplifier configuration in which the first SIM controls a first subset of low noise amplifiers associated with a first subset of the set of antenna ports, and the second SIM controls a second subset of low noise amplifiers associated with a second subset of the set of antenna ports.

Aspect 3: The method of aspect 2, wherein the first subset of low noise amplifiers and the second subset of low noise amplifiers are determined based at least in part on a magnitude of the difference between the first received signal strength and the second received signal strength.

Aspect 4: The method of any of aspects 2 through 3, wherein the first SIM controls a gain of each of the plurality of low noise amplifiers in the first low noise amplifier configuration.

Aspect 5: The method of any of aspects 2 through 4, wherein the first SIM controls a gain of each of the first subset of low noise amplifiers, and the second SIM controls the gain of each of the second subset of low noise amplifiers, in the second low noise amplifier configuration.

Aspect 6: The method of any of aspects 2 through 5, wherein the first SIM uses signals from each antenna port of the first subset of antenna ports and the second subset of antenna ports for receiving the first communications when the second low noise amplifier configuration is selected.

Aspect 7: The method of any of aspects 2 through 5, wherein the first SIM does not use any of the antenna ports of the second subset of antenna ports for receiving the first communications when the second low noise amplifier configuration is selected.

Aspect 8: The method of any of aspects 2 through 4, wherein the first SIM does not use any of the antenna ports of the second subset of antenna ports for receiving the first communications when the second low noise amplifier configuration is selected, and the second SIM does not use any of the antenna ports of the first subset of antenna ports for receiving the second communications when the second low noise amplifier configuration is selected.

Aspect 9: The method of any of aspects 1 through 8, wherein the identified low noise amplifier configuration provides for control of a plurality of low noise amplifiers at the UE, the plurality of low noise amplifiers include two or more internal low noise amplifiers that are internal to a wireless modem of the UE and two or more external low noise amplifiers that are external to the wireless modem of the UE, and wherein the first communications link and the second communications link each comprise one or more component carriers.

Aspect 10: The method of aspect 9, wherein radio frequency signals from each of the two or more external low noise amplifiers are split and provided to respective first internal low noise amplifiers associated with the first SIM and second internal low noise amplifiers associated with the second SIM.

Aspect 11: The method of any of aspect 9, wherein radio frequency signals from each of the two or more external low noise amplifiers are provided to an associated internal low noise amplifier, and an output from each of the two or more internal low noise amplifiers are split and provided to separate processing chains associated with the first SIM and the second SIM.

Aspect 12: The method of any of aspects 9 through 11, wherein the first SIM controls an automatic gain control for at least a first subset of the plurality of low noise amplifiers, and the second SIM controls the automatic gain control for at least a second subset of the plurality of low noise amplifiers, and wherein a timing for updating the automatic gain control is based at least in part on which of the first SIM or the second SIM controls the associated low noise amplifier.

Aspect 13: The method of any of aspects 9 through 12, wherein the identifying the low noise amplifier configuration comprises: determining that the difference between a first received signal strength associated with the first communications and a second received signal strength associated with the second communications exceeds a threshold value, and selecting, responsive to the determining, a low noise amplifier configuration in which the first SIM controls at least one of the two or more internal low noise amplifiers and at least one of the two or more external low noise amplifiers, and in which the second SIM controls at least one of the two or more internal low noise amplifiers.

Aspect 14: The method of aspect 13, wherein the threshold value is based at least in part on a gain control or dynamic tuning range of the two or more internal low noise amplifiers.

Aspect 15: The method of any of aspects 1 through 14, further comprising: determining that the first SIM has a higher priority than the second SIM; and mapping a first subset of the two or more antenna ports to the first SIM based at least in part on the higher priority of the first SIM, and wherein the low noise amplifier configuration is based at least in part on the mapping.

Aspect 16: The method of any of aspects 1 through 15, wherein the receiving further comprises: setting one or more analog-to-digital converter (ADC) parameters for the first communications based at least in part on a frequency offset between the first communications and the second communications when the first communications have a stronger signal strength than the second communications.

Aspect 17: The method of any of aspects 1 through 16, wherein the identifying comprises identifying a first low noise amplifier configuration based at least in part on the difference between the first received signal strength and the second received signal strength being less than or equal to a first threshold value, the first low noise amplifier configuration providing that each SIM uses each antenna port and associated low noise amplifiers for receiving the respective first and second communications, and wherein the method further comprises: determining, subsequent to identifying the first low noise amplifier configuration, that the difference between the first received signal strength and the second received signal strength exceeds the first threshold value; selecting a second low noise amplifier configuration responsive to the determining, wherein the second low noise amplifier configuration provides that the first SIM controls a first subset of low noise amplifiers associated with a first subset of the two or more antenna ports, and the second SIM controls a second subset of low noise amplifiers associated with a second subset of the two or more antenna ports; receiving the first communications via the first subset of antenna ports using the first subset of low noise amplifiers; and receiving the second communications via the second subset of antenna ports using the second subset of low noise amplifiers.

Aspect 18: The method of aspect 17, wherein the difference between the first received signal strength and the second received signal strength is determined based at least in part on filtered received signal strength indicators (RSSIs) in a sliding window, the filtered RSSIs associated with the first communications and the second communications.

Aspect 19: The method of any of aspects 17 through 18, wherein the determining comprises: determining that the difference between the first received signal strength and the second received signal strength exceeds the first threshold value on a predetermined number of occasions within a predetermined time period.

Aspect 20: The method of any of aspects 17 through 19, further comprising: determining, subsequent to the selection of the second low noise amplifier configuration, that the difference between the first received signal strength and the second received signal strength is less than or equal to a second threshold value; selecting the first low noise amplifier configuration responsive to the determining that the difference between the first received signal strength and the second received signal strength is less than or equal to a second threshold value; and receiving the first communications and the second communications via the two or more antenna ports based at least in part on the first low noise amplifier configuration.

Aspect 21: The method of aspect 20, wherein the second threshold value is less than the first threshold.

Aspect 22: The method of any of aspects 17 through 21, wherein the first SIM controls a plurality of low noise amplifiers in the first low noise amplifier configuration during periods in which the first SIM is not in a sleep mode, and the second SIM controls the plurality of low noise amplifiers in the first low noise amplifier configuration during periods in which the first SIM is in the sleep mode.

Aspect 23: The method of any of aspects 17 through 22, wherein the first SIM suspends communications during one or more slots based at least in part on a timing drift associated with the first communications or a TDD configuration mismatch between the first communications and the second communications.

Aspect 24: The method of any of aspect 1, wherein a first low noise amplifier configuration of the two or more available low noise amplifier configurations is identified for receiving the first communications and the second communications based at least in part on the difference between the first received signal strength and the second received signal strength being less than or equal to a first threshold value, the first low noise amplifier configuration providing that each SIM uses each antenna port and associated low noise amplifiers for receiving the respective first and second communications, and wherein gain control for each of the associated low noise amplifiers is controlled by the first SIM when the first received signal strength exceeds the second received signal strength.

Aspect 25: The method of any of aspect 1, wherein the identifying comprises: identifying a first low noise amplifier configuration responsive to the UE being in a first state in which the difference between the first received signal strength and the second received signal strength is less than or equal to a first threshold value and each SIM uses each of the two or more antenna ports for the concurrent communications; identifying a second low noise amplifier configuration responsive to the UE being in a second state in which the difference between the first received signal strength and the second received signal strength exceeds the first threshold value, the second low noise amplifier configuration providing that one of the first SIM or the second SIM that has a lower service priority provides gain control for a first subset of the two or more antenna ports that have relatively larger differences in received signal strength and the other of the first SIM or the second SIM provides gain control for other antenna ports outside of the first subset of the two or more antenna ports; and identifying a third low noise amplifier configuration responsive to the UE being in a third state in which the difference between the first received signal strength and the second received signal strength exceeds a second threshold value that is greater than the first threshold value, the third low noise amplifier configuration providing that one of the first SIM or the second SIM that has a higher service priority uses only a first subset of the two or more antenna ports that have relatively smaller differences in received signal strength and the other of the first SIM or the second SIM uses only one or more other antenna ports outside of the first subset of the two or more antenna ports.