Sidelink Communications

Abstract

Wireless devices may communicate with each other via a sidelink. Sidelink capability information may be sent and/or used to determine configuration parameters for sidelink communications between wireless devices.

1 . A method comprising:
 transmitting, by a first wireless device to a base station, at least one uplink radio resource control message comprising sidelink capability information of a second wireless device, wherein the first wireless device is different from the second wireless device;   receiving, by the first wireless device from the base station, configuration parameters for a transmission from the first wireless device to the second wireless device, wherein the configuration parameters for the transmission are based on the sidelink capability information associated with at least one of transmission or reception at the second wireless device; and   transmitting, by the first wireless device to the second wireless device and based on the configuration parameters, at least one transport block.   
     
     
         2 . The method of  claim 1 , further comprising receiving, by the first wireless device from the base station, a radio resource control information request message for the sidelink capability information, wherein the transmitting the at least one uplink radio resource control message is based on the radio resource control information request message. 
     
     
         3 . The method of  claim 1 , further comprising transmitting, by the first wireless device to the second wireless device, a sidelink information request message for the sidelink capability information. 
     
     
         4 . The method of  claim 1 , wherein the sidelink capability information indicates whether a multiple carrier sidelink operation is supported. 
     
     
         5 . The method of  claim 1 , wherein the sidelink capability information indicates at least one of:
 a sidelink radio access technology;   whether an unlicensed spectrum is supported; or   a supported modulation coding scheme (MCS).   
     
     
         6 . The method of  claim 1 , wherein the sidelink capability information comprises a synchronization reference source of the second wireless device, and wherein the configuration parameters for the transmission from the first wireless device to the second wireless device are based on the sidelink capability information and the synchronization reference source. 
     
     
         7 . The method of  claim 1 , further comprising receiving, by the first wireless device from the second wireless device, a response to the at least one transport block. 
     
     
         8 . The method of  claim 1 , further comprising receiving, by the first wireless device from the second wireless device, at least one sidelink message comprising the sidelink capability information of the second wireless device. 
     
     
         9 . A first wireless device comprising:
 one or more processors; and   memory storing instructions that, when executed by the one or more processors, configure the first wireless device to:
 transmit, to a base station, at least one uplink radio resource control message comprising sidelink capability information of a second wireless device, wherein the first wireless device is different from the second wireless device; 
 receive, from the base station, configuration parameters for a transmission from the first wireless device to the second wireless device, wherein the configuration parameters for the transmission are based on the sidelink capability information associated with at least one of transmission or reception at the second wireless device; and 
 transmit, to the second wireless device and based on the configuration parameters, at least one transport block. 
   
     
     
         10 . The first wireless device of  claim 9 , wherein the instructions, when executed by the one or more processors, further configure the first wireless device to receive, from the base station, a radio resource control information request message for the sidelink capability information, and to transmit the at least one uplink radio resource control message based on the radio resource control information request message. 
     
     
         11 . The first wireless device of  claim 9 , wherein the instructions, when executed by the one or more processors, further configure the first wireless device to transmit, to the second wireless device, a sidelink information request message for the sidelink capability information. 
     
     
         12 . The first wireless device of  claim 9 , wherein the sidelink capability information indicates whether a multiple carrier sidelink operation is supported. 
     
     
         13 . The first wireless device of  claim 9 , wherein the sidelink capability information indicates at least one of:
 a sidelink radio access technology;   whether an unlicensed spectrum is supported; or   a supported modulation coding scheme (MCS).   
     
     
         14 . The first wireless device of  claim 9 , wherein the sidelink capability information comprises a synchronization reference source of the second wireless device, and wherein the configuration parameters for the transmission from the first wireless device to the second wireless device are based on the sidelink capability information and the synchronization reference source. 
     
     
         15 . The first wireless device of  claim 9 , wherein the instructions, when executed by the one or more processors, further configure the first wireless device to receive, from the second wireless device, a response to the at least one transport block. 
     
     
         16 . The first wireless device of  claim 9 , wherein the instructions, when executed by the one or more processors, further configure the first wireless device to receive, from the second wireless device, at least one sidelink message comprising the sidelink capability information of the second wireless device. 
     
     
         17 . A non-transitory computer-readable medium storing instructions that, when executed, configure a first wireless device to:
 transmit, to a base station, at least one uplink radio resource control message comprising sidelink capability information of a second wireless device, wherein the first wireless device is different from the second wireless device;   receive, from the base station, configuration parameters for a transmission from the first wireless device to the second wireless device, wherein the configuration parameters for the transmission are based on the sidelink capability information associated with at least one of transmission or reception at the second wireless device; and
 transmit, to the second wireless device and based on the configuration parameters, at least one transport block. 
   
     
     
         18 . The non-transitory computer-readable medium of  claim 17 , wherein the instructions, when executed, further configure the first wireless device to receive, from the base station, a radio resource control information request message for the sidelink capability information, and to transmit the at least one uplink radio resource control message based on the radio resource control information request message. 
     
     
         19 . The non-transitory computer-readable medium of  claim 17 , wherein the instructions, when executed, further configure the first wireless device to transmit, to the second wireless device, a sidelink information request message for the sidelink capability information. 
     
     
         20 . The non-transitory computer-readable medium of  claim 17 , wherein the sidelink capability information indicates whether a multiple carrier sidelink operation is supported. 
     
     
         21 . The non-transitory computer-readable medium of  claim 17 , wherein the sidelink capability information indicates at least one of:
 a sidelink radio access technology;   whether an unlicensed spectrum is supported; or   a supported modulation coding scheme (MCS).   
     
     
         22 . The non-transitory computer-readable medium of  claim 17 , wherein the sidelink capability information comprises a synchronization reference source of the second wireless device, and wherein the configuration parameters for the transmission from the first wireless device to the second wireless device are based on the sidelink capability information and the synchronization reference source. 
     
     
         23 . The non-transitory computer-readable medium of  claim 17 , wherein the instructions, when executed, further configure the first wireless device to receive, from the second wireless device, a response to the at least one transport block. 
     
     
         24 . The non-transitory computer-readable medium of  claim 17 , wherein the instructions, when executed, further configure the first wireless device to receive, from the second wireless device, at least one sidelink message comprising the sidelink capability information of the second wireless device.