Uplink beam failure recovery for full-duplex operation

Abstract

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a wireless node may monitor for a beam failure trigger condition on an uplink; detect, based at least in part on monitoring for the beam failure trigger condition, an uplink beam failure associated with the uplink; and trigger an uplink beam failure recovery procedure based at least in part on detecting the uplink beam failure associated with the uplink. Numerous other aspects are provided.

What is claimed is: 
     
         1 . A wireless node for wireless communication, comprising:
 a memory; and   one or more processors, coupled to the memory, configured to:
 monitor for a beam failure trigger condition on an uplink; 
 detect, based at least in part on monitoring for the beam failure trigger condition, an uplink beam failure associated with the uplink; and 
 trigger an uplink beam failure recovery procedure based at least in part on detecting the uplink beam failure associated with the uplink. 
   
     
     
         2 . The wireless node of  claim 1 , wherein the one or more processors are further configured to:
 transmit, on the uplink, one or more reference signal communications to trigger one or more response communications; and   wherein the one or more processors, to monitor for the beam failure trigger condition, are configured to:
 monitor for the one or more response communications based at least in part on transmitting the one or more reference signal communications. 
   
     
     
         3 . The wireless node of  claim 2 , wherein the one or more response communications include at least one of:
 a hybrid automatic repeat request acknowledgement message,   a hybrid automatic repeat request negative acknowledgement message,   a scheduling request response message,   a physical random access channel failure response message, or   a combination thereof.   
     
     
         4 . The wireless node of  claim 2 , wherein the one or more processors, to detect the uplink beam failure, are configured to:
 detect a threshold quantity of consecutive failures associated with monitoring for the one or more response communications.   
     
     
         5 . The wireless node of  claim 2 , wherein the one or more processors, to detect the uplink beam failure, are configured to:
 detect a threshold quantity of failures associated with monitoring for the one or more response communications within a threshold period of time.   
     
     
         6 . The wireless node of  claim 1 , wherein the one or more processors are further configured to:
 receive, before detecting the uplink beam failure, information identifying a sounding reference signal resource set; and   wherein the one or more processors, to trigger the uplink beam failure recovery procedure, are configured to:
 transmit a set of sounding reference signals using a set of beams and the sounding reference signal resource set. 
   
     
     
         7 . The wireless node of  claim 1 , wherein the one or more processors are further configured to:
 perform the uplink beam failure recovery procedure based at least in part on triggering the uplink beam failure recovery procedure;   detect, while performing the uplink beam failure recovery procedure, a downlink beam failure;   end the uplink beam failure recovery procedure based at least in part on detecting the downlink beam failure; and   trigger a downlink beam failure recovery procedure based at least in part on detecting the downlink beam failure.   
     
     
         8 . The wireless node of  claim 7 , wherein the one or more processors are further configured to:
 monitor for the beam failure trigger condition on the uplink to determine whether the uplink is in beam failure after completion of the downlink beam failure recovery procedure.   
     
     
         9 . The wireless node of  claim 7 , wherein the downlink beam failure recovery procedure uses a candidate beam list that is not based at least in part on the uplink beam failure. 
     
     
         10 . The wireless node of  claim 7 , wherein the downlink beam failure recovery procedure uses a candidate beam list that is based at least in part on the uplink beam failure. 
     
     
         11 . The wireless node of  claim 7 , wherein the one or more processors are further configured to:
 determine that a plurality of beams satisfy a threshold for the downlink beam failure recovery procedure; and   transmit a plurality of random access channel transmissions with the plurality of beams to enable selection of a particular beam of the plurality of beams.   
     
     
         12 . A method of wireless communication performed by a wireless node, comprising:
 monitoring for a beam failure trigger condition on an uplink;   detecting, based at least in part on monitoring for the beam failure trigger condition, an uplink beam failure associated with the uplink; and   triggering an uplink beam failure recovery procedure based at least in part on detecting the uplink beam failure associated with the uplink.   
     
     
         13 . The method of  claim 12 , further comprising:
 transmitting, on the uplink, one or more reference signal communications to trigger one or more response communications; and   wherein monitoring for the beam failure trigger condition comprises:
 monitoring for the one or more response communications based at least in part on transmitting the one or more reference signal communications. 
   
     
     
         14 . The method of  claim 13 , wherein the one or more response communications include at least one of:
 a hybrid automatic repeat request acknowledgement message,   a hybrid automatic repeat request negative acknowledgement message,   a scheduling request response message,   a physical random access channel failure response message, or   a combination thereof.   
     
     
         15 . The method of  claim 13 , wherein detecting the uplink beam failure comprises:
 detecting a threshold quantity of consecutive failures associated with monitoring for the one or more response communications.   
     
     
         16 . The method of  claim 13 , wherein detecting the uplink beam failure comprises:
 detecting a threshold quantity of failures associated with monitoring for the one or more response communications within a threshold period of time.   
     
     
         17 . The method of  claim 12 , further comprising:
 receiving, before detecting the uplink beam failure, information identifying a sounding reference signal resource set; and   wherein triggering the uplink beam failure recovery procedure comprises:
 transmitting a set of sounding reference signals using a set of beams and the sounding reference signal resource set. 
   
     
     
         18 . The method of  claim 12 , further comprising:
 performing the uplink beam failure recovery procedure based at least in part on triggering the uplink beam failure recovery procedure;   detecting, while performing the uplink beam failure recovery procedure, a downlink beam failure;   ending the uplink beam failure recovery procedure based at least in part on detecting the downlink beam failure; and   triggering a downlink beam failure recovery procedure based at least in part on detecting the downlink beam failure.   
     
     
         19 . The method of  claim 18 , further comprising:
 monitoring for the beam failure trigger condition on the uplink to determine whether the uplink is in beam failure after completion of the downlink beam failure recovery procedure.   
     
     
         20 . The method of  claim 18 , wherein the downlink beam failure recovery procedure uses a candidate beam list that is not based at least in part on the uplink beam failure. 
     
     
         21 . The method of  claim 18 , wherein the downlink beam failure recovery procedure uses a candidate beam list that is based at least in part on the uplink beam failure. 
     
     
         22 . The method of  claim 18 , further comprising:
 determining that a plurality of beams satisfy a threshold for the downlink beam failure recovery procedure; and   transmitting a plurality of random access channel transmissions with the plurality of beams to enable selection of a particular beam of the plurality of beams.   
     
     
         23 . A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising:
 one or more instructions that, when executed by one or more processors of a wireless node, cause the wireless node to:
 monitor for a beam failure trigger condition on an uplink; 
 detect, based at least in part on monitoring for the beam failure trigger condition, an uplink beam failure associated with the uplink; and 
 trigger an uplink beam failure recovery procedure based at least in part on detecting the uplink beam failure associated with the uplink. 
   
     
     
         24 . The non-transitory computer-readable medium of  claim 23 , wherein the one or more instructions further cause the wireless node to:
 transmit, on the uplink, one or more reference signal communications to trigger one or more response communications; and   wherein the one or more instructions, that cause the wireless node to monitor for the beam failure trigger condition, cause the wireless node to:
 monitor for the one or more response communications based at least in part on transmitting the one or more reference signal communications. 
   
     
     
         25 . The non-transitory computer-readable medium of  claim 24 , wherein the one or more response communications include at least one of:
 a hybrid automatic repeat request acknowledgement message,   a hybrid automatic repeat request negative acknowledgement message,   a scheduling request response message,   a physical random access channel failure response message, or   a combination thereof.   
     
     
         26 . The non-transitory computer-readable medium of  claim 24 , wherein the one or more instructions, that cause the wireless node to detect the uplink beam failure, cause the wireless node to:
 detect a threshold quantity of consecutive failures associated with monitoring for the one or more response communications.   
     
     
         27 . An apparatus for wireless communication, comprising:
 means for monitoring for a beam failure trigger condition on an uplink;   means for detecting, based at least in part on monitoring for the beam failure trigger condition, an uplink beam failure associated with the uplink; and   means for triggering an uplink beam failure recovery procedure based at least in part on detecting the uplink beam failure associated with the uplink.   
     
     
         28 . The apparatus of  claim 27 , further comprising:
 means for transmitting, on the uplink, one or more reference signal communications to trigger one or more response communications; and   wherein the means for monitoring for the beam failure trigger condition comprises:
 means for monitoring for the one or more response communications based at least in part on transmitting the one or more reference signal communications. 
   
     
     
         29 . The apparatus of  claim 28 , wherein the one or more response communications include at least one of:
 a hybrid automatic repeat request acknowledgement message,   a hybrid automatic repeat request negative acknowledgement message,   a scheduling request response message,   a physical random access channel failure response message, or   a combination thereof.   
     
     
         30 . The apparatus of  claim 28 , wherein the means for detecting the uplink beam failure comprises:
 means for detecting a threshold quantity of consecutive failures associated with monitoring for the one or more response communications.