US-12627967-B2 - Techniques to configure low noise amplifier for dual-subscriber dual-active user equipment

Abstract

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.

Inventors

• Siavash Ekbatani
• Qingxin Chen
• Yuanning Yu
• Paolo Minero
• Sandeep Rao
• Bo Wen

Assignees

• QUALCOMM INCORPORATED

Dates

Publication Date

20260512

Application Date

20221208

Claims (20)

1. 1 . A method for wireless communication at a user equipment (UE), comprising: establishing a first communications link via two or more antenna ports using a first subscriber identity module (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 using the first SIM and the second communications using the second SIM based at least in part on activation of the dual-subscriber dual-active mode, the identifying of the low noise amplifier configuration based at least in part on a difference between a first received signal strength associated with the first communications using the first SIM and a second received signal strength associated with the second communications using the second SIM; 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.
2. 2 . The method of claim 1 , wherein the identifying the low noise amplifier configuration comprises: measuring the first received signal strength associated with the first communications using the first SIM and the second received signal strength associated with the second communications using the second SIM to determine the 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.
3. 3 . The method of claim 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.
4. 4 . The method of claim 2 , wherein the first SIM controls a gain of each of the plurality of low noise amplifiers in the first low noise amplifier configuration.
5. 5 . The method of claim 2 , 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.
6. 6 . The method of claim 2 , wherein the first SIM uses signals from each antenna port of the first subset of the set of antenna ports and the second subset of the set of antenna ports for receiving the first communications when the second low noise amplifier configuration is selected.
7. 7 . The method of claim 2 , wherein the first SIM does not use any of the antenna ports of the second subset of the set of antenna ports for receiving the first communications when the second low noise amplifier configuration is selected.
8. 8 . The method of claim 2 , wherein the first SIM does not use any of the antenna ports of the second subset of the set 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 the set of antenna ports for receiving the second communications when the second low noise amplifier configuration is selected.
9. 9 . The method of claim 1 , 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.
10. 10 . The method of claim 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.
11. 11 . The method of claim 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.
12. 12 . The method of claim 9 , 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 an associated low noise amplifier.
13. 13 . The method of claim 9 , wherein the identifying the low noise amplifier configuration comprises: determining that the difference between the first received signal strength associated with the first communications and the second received signal strength associated with the second communications exceeds a threshold value, and selecting, responsive to the determining, the 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.
14. 14 . The method of claim 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.
15. 15 . The method of claim 1 , 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.
16. 16 . The method of claim 1 , 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.
17. 17 . The method of claim 1 , 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 the two or more antenna ports using the first subset of low noise amplifiers; and receiving the second communications via the second subset of the two or more antenna ports using the second subset of low noise amplifiers.
18. 18 . The method of claim 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.
19. 19 . The method of claim 17 , 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.
20. 20 . The method of claim 17 , 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 the 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.

Description

FIELD OF TECHNOLOGY The following relates to wireless communications, including techniques to configure low noise amplifier for dual-subscriber dual-active user equipment. BACKGROUND Wireless communications systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, and so on. These systems may be capable of supporting communication with multiple users by sharing the available system resources (e.g., time, frequency, and power). Examples of such multiple-access systems include fourth generation (4G) systems such as Long Term Evolution (LTE) systems, LTE-Advanced (LTE-A) systems, or LTE-A Pro systems, and fifth generation (5G) systems which may be referred to as New Radio (NR) systems. These systems may employ technologies such as code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal FDMA (OFDMA), or discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-S-OFDM). A wireless multiple-access communications system may include one or more base stations or one or more network access nodes, each simultaneously supporting communication for multiple communication devices, which may be otherwise known as user equipment (UE). 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