Device and method in radio communication system, and computer-readable storage medium

Abstract

Provided in the present disclosure are a device and method in a radio communication system, and a computer-readable storage medium. The device comprises a processing circuit configured to: decode a group common physical downlink control channel (group common PDCCH) of a user equipment group comprising a target user equipment so as to acquire control information related to multi-user multiple input multiple output (MU-MIMO) transmission of a control channel; and decode a user equipment-specific physical downlink control channel (UE-specific PDCCH) of the target user equipment on the basis of the control information so as to acquire specific transmission control information related to the target user equipment, where the UE-specific PDCCH of the target user equipment and UE-specific PDCCH of the other user equipment are stacked on a same transmission resource for transmission. MU-MIMO transmission with respect to a downlink control channel is effectively implemented, thus increasing resource utilization rate.

1 . A device for a user equipment in a wireless communication system, the device comprising processing circuitry configured to:
 obtain, from a received group common physical downlink control channel (GC-PDCCH), indication information of control resource set in which user equipment specific physical downlink control channel (UE-specific PDCCH) appears; and   detect the UE-specific PDCCH in the control resource set indicated by the indication information.   
     
     
         2 . The device according to  claim 1 , wherein the UE-specific PDCCH and UE-specific PDCCH of other user equipment are superposed on same transmission resource. 
     
     
         3 . The device according to  claim 1 ,
 wherein the processing circuitry is configured to decode the GC-PDCCH for a group of user equipment comprising target user equipment to obtain control information related to Multi-User Multiple Input Multiple Output (MU-MIMO) transmission of control channel.   
     
     
         4 . The device according to  claim 3 ,
 wherein the GC-PDCCH is generated at a base station by respectively scrambling the control information related to MU-MIMO transmission of control channel of each user equipment in the control information using a group common identifier and a specific identifier of each user equipment, the group common identifier and the specific identifier of the target user equipment being transmitted from the base station.   
     
     
         5 . The device according to  claim 4 , wherein the group common identifier is a group common radio network temporary identifier, and the specific identifier is a cell-radio network temporary identifier (C-RNTI). 
     
     
         6 . The device according to  claim 4 ,
 wherein the control information comprises information related to demodulation reference signal (DMRS) configuration; and   wherein the control information comprises a total layer number of the MU-MIMO transmission of control channel of the group of user equipment.   
     
     
         7 . The device according to  claim 1 , wherein the indication information comprises indication related to OFDM symbols occupied by the control resource set. 
     
     
         8 . A method in a wireless communication system, the method comprising:
 obtaining, from a received group common physical downlink control channel (GC-PDCCH), indication information of control resource set in which user equipment specific physical downlink control channel (UE-specific PDCCH) appears; and   detecting the UE-specific PDCCH in the control resource set indicated by the indication information.   
     
     
         9 . The method according to  claim 8 , wherein the UE-specific PDCCH and UE-specific PDCCH of other user equipment are superposed on same transmission resource. 
     
     
         10 . The method according to  claim 8 ,
 wherein, further comprising decoding the GC-PDCCH for a group of user equipment comprising target user equipment to obtain control information related to Multi-User Multiple Input Multiple Output (MU-MIMO) transmission of control channel.   
     
     
         11 . The method according to  claim 10 ,
 wherein the GC-PDCCH is generated at a base station by respectively scrambling the control information related to MU-MIMO transmission of control channel of each user equipment in the control information using a group common identifier and a specific identifier of each user equipment, the group common identifier and the specific identifier of the target user equipment being transmitted from the base station.   
     
     
         12 . The method according to  claim 11 , wherein the group common identifier is a group common radio network temporary identifier, and the specific identifier is a cell-radio network temporary identifier (C-RNTI). 
     
     
         13 . The method according to  claim 11 ,
 wherein the control information comprises information related to demodulation reference signal (DMRS) configuration; and   wherein the control information comprises a total layer number of the MU-MIMO transmission of control channel of the group of user equipment.   
     
     
         14 . The method according to  claim 8 , wherein the indication information comprises indication related to OFDM symbols occupied by the control resource set. 
     
     
         15 . A non-transitory computer-readable storage medium including computer executable instructions, wherein the instructions, when executed by a wireless communication system, cause the wireless communication system to perform a method, the method comprising:
 obtaining, from a received group common physical downlink control channel (GC-PDCCH), indication information of control resource set in which user equipment specific physical downlink control channel (UE-specific PDCCH) appears; and   detecting the UE-specific PDCCH in the control resource set indicated by the indication information.