Power optimizations for transmission opportunity (txop) monitoring

Abstract

Wireless communications systems and methods related monitoring the start of a transmission opportunity (TXOP) in unlicensed or shared frequency bands are provided. In one embodiment, a first wireless communication device communicates, with a second wireless communication device, a first configuration including a set of first control channel monitoring periods outside of a TXOP. The first wireless communication device communicates, with the second wireless communication device, a communication signal during the TXOP based on a second control channel monitoring period longer than each of the first control channel monitoring periods. In one embodiment, a first wireless communication device communicates, with a second wireless communication device, a configuration including a first search space for a control channel monitoring outside of a TXOP and a second search space for a control channel monitoring within the TXOP, the second search space being partially-overlapped with the first search space.

What is claimed is: 
     
         1 . A method of wireless communication, comprising:
 communicating, by a first wireless communication device with a second wireless communication device, a first configuration including a set of first control channel monitoring periods outside of a transmission opportunity (TXOP); and   communicating, by the first wireless communication device with the second wireless communication device, a communication signal during the TXOP based on a second control channel monitoring period longer than each of the first control channel monitoring periods.   
     
     
         2 . The method of  claim 1 , wherein the set of first control channel monitoring periods are contiguous in time and adjacent to another set of first control channel monitoring periods contiguous in time, and wherein the another set of first control channel monitoring periods are assigned to a third wireless communication device different from the first wireless communication device and the second wireless communication device. 
     
     
         3 . The method of  claim 1 , wherein the set of first control channel monitoring periods interleaves with another set of first control channel monitoring periods in time, and wherein the another set of first control channel monitoring periods are assigned to a third wireless communication device different from the first wireless communication device and the second wireless communication device. 
     
     
         4 . The method of  claim 1 , further comprising:
 communicating, by the first wireless communication device with the second wireless communication device, a second configuration including a third control channel monitoring period outside of the TXOP,   wherein the third control channel monitoring period is longer than each of the first control channel monitoring periods.   
     
     
         5 . The method of  claim 4 , wherein the communicating the second configuration includes:
 communicating, by the first wireless communication device with the second wireless communication device, at least one of a control channel message including the second configuration or a scheduling grant including the second configuration.   
     
     
         6 . The method of  claim 1 , further comprising:
 monitoring, by the first wireless communication device, a control channel for a scheduling grant from the second wireless communication device based on the set of first control channel monitoring periods;   determining, by the first wireless communication device, that no scheduling grant has been received from the second wireless communication device for a time period; and   switching, by the first wireless communication device in response to the determining, to monitor the control channel based on a third control channel monitoring period that is longer than each of the first control channel periods.   
     
     
         7 . The method of  claim 1 , further comprising:
 communicating, by the first wireless communication device with the second wireless communication device, an instruction to switch from the set of first control channel monitoring periods to the second control channel monitoring period.   
     
     
         8 . The method of  claim 1 , further comprising:
 communicating, by the first wireless communication device with the second wireless communication device, an instruction to update control channel monitoring, the instruction enabling the control channel monitoring, disabling the control channel monitoring, or modifying a period of the control channel monitoring.   
     
     
         9 . The method of  claim 8 , wherein the TXOP is in a first frequency band, and wherein the instruction is communicated in a second frequency band different from the first frequency band. 
     
     
         10 . The method of  claim 8 , wherein the communicating the instruction includes:
 communicating, by the first wireless communication device with the second wireless communication device, the instruction to disable the control channel monitoring for a time period between the TXOP and a next TXOP, and wherein the time period is associated with a listen-before-talk (LBT) backoff period for the next TXOP.   
     
     
         11 . The method of  claim 8 , wherein the communicating the instruction includes:
 communicating, by the first wireless communication device with the second wireless communication device, the instruction based on an expected beam direction associated with the TXOP, the first wireless communication device, and the second wireless communication device, and   wherein the communicating the communication signal is based on the expected beam direction.   
     
     
         12 . The method of  claim 8 , wherein the communicating the instruction includes:
 communicating, by the first wireless communication device with the second wireless communication device, the instruction based on an expected beam direction associated with an expected communication during another TXOP between a third wireless communication device and at least one of the first wireless communication device or the second wireless communication device, and   wherein the second wireless communication device is different from the third wireless communication device.   
     
     
         13 . An apparatus comprising:
 a transceiver configured to:
 communicate, with a second wireless communication device, a first configuration including a set of first control channel monitoring periods outside of a transmission opportunity (TXOP); and 
 communicate, with the second wireless communication device, a communication signal during the TXOP based on a second control channel monitoring period longer than each of the first control channel monitoring periods. 
   
     
     
         14 . The apparatus of  claim 13 , wherein the set of first control channel monitoring periods are contiguous in time and adjacent to another set of first control channel monitoring periods contiguous in time, and wherein the another set of first control channel monitoring periods are assigned to a third wireless communication device different from the apparatus and the second wireless communication device. 
     
     
         15 . The apparatus of  claim 13 , wherein the set of first control channel monitoring periods interleaves with another set of first control channel monitoring periods in time, and wherein the another set of first control channel monitoring periods are assigned to a third wireless communication device different from the apparatus and the second wireless communication device. 
     
     
         16 . The apparatus of  claim 13 , wherein the transceiver is further configured to:
 communicate, with the second wireless communication device, a second configuration including a third control channel monitoring period outside of the TXOP, and   wherein the third control channel monitoring period is longer than each of the first control channel monitoring periods.   
     
     
         17 . The apparatus of  claim 16 , wherein the transceiver is further configured to communicate the second configuration by:
 communicating, with the second wireless communication device, at least one of a control channel message including the second configuration or a scheduling grant including the second configuration.   
     
     
         18 . The apparatus of  claim 13 , wherein the transceiver is further configured to:
 communicate, with the second wireless communication device, an instruction to switch from the set of first control channel monitoring periods to the second control channel monitoring period.   
     
     
         19 . The apparatus of  claim 13 , wherein the transceiver is further configured to:
 communicate, with the second wireless communication device, an instruction to update control channel monitoring, the instruction enabling the control channel monitoring, disabling the control channel monitoring, or modifying a period of the control channel monitoring.   
     
     
         20 . The apparatus of  claim 19 , wherein the TXOP is in a first frequency band, and wherein the instruction is communicated in a second frequency band different from the first frequency band. 
     
     
         21 . The apparatus of  claim 19 , wherein the transceiver is further configured to communicate the instruction by:
 communicating, with the second wireless communication device, the instruction based on an expected beam direction associated with an expected communication during the TXOP between a third wireless communication device and at least one of the apparatus or the second wireless communication device, and   wherein the second wireless communication device is different from the third wireless communication device.   
     
     
         22 . A computer-readable medium having program code recorded thereon, the program code comprising:
 code for causing a first wireless communication device to communicate, with a second wireless communication device, a first configuration including a set of first control channel monitoring periods outside of a transmission opportunity (TXOP); and   code for causing the first wireless communication device to communicate, with the second wireless communication device, a communication signal during the TXOP based on a second control channel monitoring period longer than each of the first control channel monitoring periods.   
     
     
         23 . The computer-readable medium of  claim 22 , wherein the set of first control channel monitoring periods are contiguous in time and adjacent to another set of first control channel monitoring periods contiguous in time, and wherein the another set of first control channel monitoring periods are assigned to a third wireless communication device different from the first wireless communication device and the second wireless communication device. 
     
     
         24 . The computer-readable medium of  claim 22 , wherein the set of first control channel monitoring periods interleaves with another set of first control channel monitoring periods in time, and wherein the another set of first control channel monitoring periods are assigned to a third wireless communication device different from the first wireless communication device and the second wireless communication device. 
     
     
         25 . The computer-readable medium of  claim 22 , further comprising:
 code for causing the first wireless communication device to communicate, with the second wireless communication device, a second configuration including a third control channel monitoring period outside of the TXOP,   wherein the third control channel monitoring period is longer than each of the first control channel monitoring periods.   
     
     
         26 . The computer-readable medium of  claim 25 , wherein the code for causing the first wireless communication device to communicate the second configuration is further configured to:
 communicate, with the second wireless communication device, at least one of a control channel message including the second configuration or a scheduling grant including the second configuration.   
     
     
         27 . The computer-readable medium of  claim 22 , further comprising:
 code for causing the first wireless communication device to communicate, with the second wireless communication device, an instruction to switch from the set of first control channel monitoring periods to the second control channel monitoring period.   
     
     
         28 . The computer-readable medium of  claim 22 , further comprising:
 code for causing the first wireless communication device to communicate, with the second wireless communication device, an instruction to update or disable control channel monitoring, the instruction enabling the control channel monitoring, disabling the control channel monitoring, or modifying a period of the control channel monitoring.   
     
     
         29 . The computer-readable medium of  claim 28 , wherein the TXOP is in a first frequency band, and wherein the instruction is communicated in a second frequency band different from the first frequency band. 
     
     
         30 . The computer-readable medium of  claim 28 , wherein the code for causing the first wireless communication device to communicate the instruction is further configured to:
 communicate, with the second wireless communication device, the instruction based on an expected beam direction associated with an expected communication during another TXOP between a third wireless communication device and at least one of the first wireless communication device or the second wireless communication device, and   wherein the second wireless communication device is different from the third wireless communication device.