Management of antenna switching according to a sounding reference symbol antenna switching configuration

Abstract

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive an antenna switch selection associated with a dual connectivity antenna configuration, wherein the antenna switch selection is associated with a first radio access technology (RAT) and the dual connectivity antenna configuration permits communication via the first RAT and a second RAT; determine, based at least in part on the antenna switching selection, a quantity of communication chains, associated with the first RAT, that are affected by an antenna switching process of the second RAT; and selectively permit, based at least in part on the quantity of communication chains, a reconfiguration of the dual connectivity antenna configuration according to the antenna switch selection. Numerous other aspects are provided.

1 . A method of wireless communication performed by a user equipment (UE), comprising:
 receiving an antenna switch selection associated with an antenna configuration, wherein the antenna switch selection is associated with a first radio access technology (RAT) and the antenna configuration permits communication via the first RAT and a second RAT;   determining, based at least in part on the antenna switch selection, a quantity of communication chains, associated with the first RAT, that are affected by a sounding reference symbol (SRS) antenna switching process of the second RAT; and   selectively permitting, based at least in part on the quantity of communication chains affected by the SRS antenna switching process, a reconfiguration of the antenna configuration according to the antenna switch selection.   
     
     
         2 . A user equipment (UE), comprising:
 one or more memories; and   one or more processors, coupled to the one or more memories, individually or collectively configured to:
 receive an antenna switch selection associated with an antenna configuration, wherein the antenna switch selection is associated with a first radio access technology (RAT) and the antenna configuration permits communication via the first RAT and a second RAT; 
 determine, based at least in part on the antenna switch selection, a quantity of communication chains, associated with the first RAT, that are affected by a sounding reference symbol (SRS) antenna switching process of the second RAT; and 
 selectively permit, based at least in part on the quantity of communication chains affected by the SRS antenna switching process, a reconfiguration of the antenna configuration according to the antenna switch selection. 
   
     
     
         3 . The UE of  claim 2 , wherein the antenna configuration is a dual connectivity antenna configuration. 
     
     
         4 . The UE of  claim 2 , wherein the antenna configuration permits the communication via the first RAT using a first subscriber unit and via the second RAT using a second subscriber unit. 
     
     
         5 . The UE of  claim 2 , wherein:
 the first RAT uses at least one of time-division duplexing (TDD) or frequency-division duplexing (FDD) for wireless communication, and   the second RAT uses at least one of TDD or FDD for wireless communication.   
     
     
         6 . The UE of  claim 2 , wherein the antenna switch selection is associated with an antenna switched diversity selection process of the first RAT. 
     
     
         7 . The UE of  claim 2 , wherein a communication chain, of the quantity of communication chains, comprises at least one of:
 a receive chain of the first RAT, or   a transmit chain of the first RAT.   
     
     
         8 . The UE of  claim 2 , wherein a communication chain, of the quantity of communication chains, is affected by the SRS antenna switching process based at least in part on the SRS antenna switching process causing the communication chain to be switched to a different antenna. 
     
     
         9 . The UE of  claim 2 , wherein a communication chain, of the quantity of communication chains, is affected by the SRS antenna switching process based at least in part on the SRS antenna switching process causing the first RAT and the second RAT to share a same antenna of the antenna configuration. 
     
     
         10 . The UE of  claim 2 , wherein the antenna configuration comprises:
 a plurality of antennas, and   one or more cross-switches to adjust the antenna configuration.   
     
     
         11 . The UE of  claim 2 , wherein, to selectively permit the antenna switch selection, the one or more processors are individually or collectively configured to:
 determine that the quantity of communication chains does not satisfy a threshold associated with enabling the antenna configuration to be adjusted according to the antenna switch selection;   determine an alternative antenna switch selection that satisfies the threshold; and   enable the alternative antenna switch selection to be selected to adjust the antenna configuration.   
     
     
         12 . The UE of  claim 2 , wherein, to selectively permit the antenna switch selection, the one or more processors are individually or collectively configured to:
 selectively permit the reconfiguration based at least in part on whether the quantity of the communication chains satisfies a threshold associated with enabling the antenna configuration to be adjusted according to the antenna switch selection,
 wherein the antenna switch selection is to be blocked when the quantity of the communication chains does not satisfy the threshold, or 
 wherein the antenna switch selection is to be performed when the quantity of the communication chains satisfies the threshold. 
   
     
     
         13 . The UE of  claim 12 , wherein the threshold is a fixed threshold. 
     
     
         14 . The UE of  claim 13 , wherein the fixed threshold is used to determine a maximum downlink rank that is reported to a network associated with the first RAT. 
     
     
         15 . The UE of  claim 13 , wherein the fixed threshold is associated with a multiple-input multiple-output antenna capability that is reported to a network associated with the first RAT. 
     
     
         16 . The UE of  claim 12 , wherein the threshold is a dynamic threshold that is based at least in part on a metric associated with the first RAT. 
     
     
         17 . The UE of  claim 16 , wherein the metric comprises at least one of:
 a current downlink rank state,   a filtered downlink rank state during a time period, or   a maximum rank state during a time period.   
     
     
         18 . The UE of  claim 2 , wherein the first RAT comprises a Long-Term Evolution (LTE) technology and the second RAT comprises a New Radio (NR) technology. 
     
     
         19 . The UE of  claim 2 , wherein the first RAT and the second RAT are associated with a New Radio (NR) technology. 
     
     
         20 . A non-transitory computer-readable medium storing a set of instructions, the set of instructions comprising:
 one or more instructions that, when executed by one or more processors of a user equipment (UE), cause the UE to:
 receive an antenna switch selection associated with an antenna configuration, wherein the antenna switch selection is associated with a first radio access technology (RAT) and the antenna configuration permits communication via the first RAT and a second RAT; 
 determine, based at least in part on the antenna switch selection, a quantity of communication chains, associated with the first RAT, that are affected by a sounding reference symbol (SRS) antenna switching process of the second RAT; and 
 selectively permit, based at least in part on the quantity of communication chains affected by the SRS antenna switching process, a reconfiguration of the antenna configuration according to the antenna switch selection.