Uplink transmission cancellation

Abstract

Methods, systems, and devices for wireless communications are described. In some examples, a base station or other network entity may allocate uplink resources to UEs, or groups of UEs, that are subsequently reallocated. For example, a base station may determine a reallocation of uplink resources and issue a cancellation or preemption indication that may correspond to at least a portion of the previously-allocated resources (e.g., as allocated to particular UEs). UEs may be configured to monitor for cancellation or preemption indications, and based on received cancellation or preemption indications, UEs may determine whether or not to proceed with an uplink transmission using their previously-allocated uplink resources.

What is claimed is: 
     
         1 . A method for wireless communications at a network entity, the method comprising:
 outputting an allocation of uplink resources associated with a first type of communications with a first latency threshold;   determining a reallocation of the uplink resources based at least in part on a second type of communications with a second latency threshold that is different from the first latency threshold; and   outputting an uplink cancellation indication corresponding to the uplink resources based at least in part on the determining.   
     
     
         2 . The method of  claim 1 , further comprising:
 generating a bitmap associated with a set of communication resources in the time domain and frequency domain, each bit of the bitmap corresponding to a respective subset of the communication resources, and each bit indicating whether or not cancellation applies to the respective subset of the communication resources,   wherein outputting the uplink cancellation indication comprises outputting the bitmap.   
     
     
         3 . The method of  claim 2 , wherein the bitmap corresponds to a configured uplink bandwidth part. 
     
     
         4 . The method of  claim 2 , wherein outputting the uplink cancellation indication comprises:
 outputting a repetition indicator associated with the bitmap.   
     
     
         5 . The method of  claim 2 , wherein the respective subset of the communication resources corresponding to each bit of the bitmap corresponds to uplink resources of an uplink/downlink TDD configuration. 
     
     
         6 . The method of  claim 1 , wherein determining the reallocation of resources comprises:
 determining a time for applying cancellation based at least in part on a time of transmitting the uplink cancellation indication and a configured time offset for cancellation.   
     
     
         7 . The method of  claim 6 , wherein the configured time offset for cancellation is based at least in part on a user equipment (UE) capability. 
     
     
         8 . The method of  claim 6 , wherein determining the time for applying cancellation is based at least in part on an uplink/downlink time division duplex (TDD) configuration. 
     
     
         9 . The method of  claim 1 , further comprising:
 outputting an uplink grant comprising communication resources associated with the uplink cancellation indication, the uplink grant indicating to the UE to ignore at least a portion of the uplink cancellation indication.   
     
     
         10 . The method of  claim 9 , wherein the uplink grant is associated with the second type of communications, and the indication to the UE to ignore at least a portion of the uplink cancellation indication is based at least in part on the uplink grant being associated with the second type of communications. 
     
     
         11 . The method of  claim 9 , wherein the uplink grant is associated with a type of physical channel, and the indication to the UE to ignore at least a portion of the uplink cancellation indication is based at least in part on the type of physical channel. 
     
     
         12 . An apparatus comprising:
 a processor,   memory coupled to the processor, and   instructions stored in the memory and executable by the processor to cause the apparatus to:
 output an allocation of uplink resources associated with a first type of communications with a first latency threshold; 
 determine a reallocation of the uplink resources based at least in part on a second type of communications with a second latency threshold that is different from the first latency threshold; and 
 output an uplink cancellation indication corresponding to the uplink resources based at least in part on the determining. 
   
     
     
         13 . The apparatus of  claim 12 , wherein the instructions are further executable by the processor to cause the apparatus to:
 generate a bitmap associated with a set of communication resources in the time domain and frequency domain, each bit of the bitmap corresponding to a respective subset of the communication resources, and each bit indicating whether or not cancellation applies to the respective subset of the communication resources,   wherein the instructions to output the uplink cancellation indication comprise instructions executable by the processor to output the bitmap.   
     
     
         14 . The apparatus of  claim 13 , wherein the bitmap corresponds to a configured uplink bandwidth part. 
     
     
         15 . The apparatus of  claim 13 , wherein the instructions to output the uplink cancellation indication comprise instructions executable by the processor to cause the apparatus to:
 output a repetition indicator associated with the bitmap.   
     
     
         16 . The apparatus of  claim 13 , wherein the respective subset of the communication resources corresponding to each bit of the bitmap corresponds to uplink resources of an uplink/downlink TDD configuration. 
     
     
         17 . The apparatus of  claim 12 , wherein the instructions to determine the reallocation of resources comprises instructions executable by the processor to:
 determine a time for applying cancellation based at least in part on a time of transmitting the uplink cancellation indication and a configured time offset for cancellation.   
     
     
         18 . The apparatus of  claim 17 , wherein the configured time offset for cancellation is based at least in part on a user equipment (UE) capability. 
     
     
         19 . The apparatus of  claim 17 , wherein the instructions to determine the time for applying cancellation is based at least in part on an uplink/downlink time division duplex (TDD) configuration. 
     
     
         20 . The apparatus of  claim 12 , wherein the instructions are further executable by the processor to cause the apparatus to:
 output an uplink grant comprising communication resources associated with the uplink cancellation indication, the uplink grant indicating to the UE to ignore at least a portion of the uplink cancellation indication.   
     
     
         21 . The apparatus of  claim 20 , wherein the uplink grant is associated with the second type of communications, and the indication to the UE to ignore at least a portion of the uplink cancellation indication is based at least in part on the uplink grant being associated with the second type of communications. 
     
     
         22 . The apparatus of  claim 20 , wherein the uplink grant is associated with a type of physical channel, and the indication to the UE to ignore at least a portion of the uplink cancellation indication is based at least in part on the type of physical channel. 
     
     
         23 . An apparatus comprising:
 means for outputting an allocation of uplink resources associated with a first type of communications with a first latency threshold;   means for determining a reallocation of the uplink resources based at least in part on a second type of communications with a second latency threshold that is different from the first latency threshold; and   means for outputting an uplink cancellation indication corresponding to the uplink resources based at least in part on the determining.   
     
     
         24 . A non-transitory computer-readable medium storing code for wireless communication at a network entity, the code comprising instructions executable by a processor to:
 output an allocation of uplink resources associated with a first type of communications with a first latency threshold;   determine a reallocation of the uplink resources based at least in part on a second type of communications with a second latency threshold that is different from the first latency threshold; and   output an uplink cancellation indication corresponding to the uplink resources based at least in part on the determining.