Over-the-Air Signal Assisted Interference Cancellation or Suppression

Abstract

A method of providing over-the-air assistance information for interference cancellation or suppression to the receiver is proposed. Under a first solution, a two-stage DCI (downlink control information) or SCI (sidelink control information) scheduling method is proposed. The set of first-stage DCI or SCI provides a part of scheduling information which is beneficial for interference cancellation or suppression and is broadcasted by a transmitter or scheduler to all receivers. The set of second-stage DCI or SCI includes the remaining scheduling information and is unicasted by a transmitter or scheduler to each receiver. Under a second solution, assistance information DCI for interference cancellation or suppression is broadcasted by a transmitter or scheduler to all receivers.

What is claimed is: 
     
         1 . A method comprising:
 receiving and detecting one or more first-stage sidelink control information (SCIs) for one or more receiving user equipments (UEs) transmitted from one or more transmitting UEs by a user equipment (UE) in a vehicle-to-everything or device-to-device wireless communication network; and   receiving and detecting a second-stage SCI to obtain scheduling information to receive a scheduled physical sidelink shared channel (PSSCH) for data based on a higher-layer configured UE ID and the information obtained in the corresponding first-stage SCI, wherein the scheduling information is carried in one of the detected first-stage SCIs and the detected second-stage SCI.   
     
     
         2 . The method of  claim 1 , wherein the first-stage DCI comprises at least one of resource allocation information for the scheduled data, a modulation order, a number of antenna ports, a resource block bundling size, and a number of spatial layers. 
     
     
         3 . The method of  claim 1 , wherein the UE monitors the first-stage SCI via a broadcasted/groupcasted signaling over a predefined or preconfigured search space. 
     
     
         4 . The method of  claim 1 , wherein the UE monitors the second-stage SCI via a unicasted/groupcasted signaling over a UE-specific or group-specific search space. 
     
     
         5 . The method of  claim 1 , wherein the UE is preconfigured with demodulation reference signal (DMRS) scrambling sequence seed to avoid collision. 
     
     
         6 . The method of  claim 1 , wherein the first-stage SCI and the second-stage SCI are both located inside a Physical Sidelink Control Channel (PSCCH) region. 
     
     
         7 . The method of  claim 1 , wherein the first-stage SCI is located inside a Physical Sidelink Control Channel (PSCCH) region, and wherein the second-stage SCI is located inside a Physical Sidelink Shared Channel (PSSCH) region. 
     
     
         8 . The method of  claim 1 , further comprising:
 performing interference cancellation or suppression for the scheduled PSSCH based on the detected one or more first-stage SCIs.   
     
     
         9 . A User Equipment (UE) comprising:
 a receiver that receives one or more first-stage sidelink control information (SCIs) and a second-stage SCI for one or more receiving user equipments (UEs) transmitted from one or more transmitting UEs in a vehicle-to-everything or device-to-device wireless communication network; and   a detector that detects the one or more first-stage SCIs and the second-stage SCI to obtain scheduling information to receive a scheduled physical sidelink shared channel (PSSCH) for data based on a higher-layer configured UE ID and the information obtained in the corresponding first-stage SCI, wherein the scheduling information is carried in one of the detected first-stage SCIs and the detected second-stage SCI.   
     
     
         10 . The UE of  claim 9 , wherein the first-stage DCI comprises at least one of resource allocation information for the scheduled data, a modulation order, a number of antenna ports, a resource block bundling size, and a number of spatial layers. 
     
     
         11 . The UE of  claim 9 , wherein the UE monitors the first-stage SCI via a broadcasted/groupcasted signaling over a predefined or preconfigured search space. 
     
     
         12 . The UE of  claim 9 , wherein the UE monitors the second-stage SCI via a unicasted/groupcasted signaling over a UE-specific or group-specific search space. 
     
     
         13 . The UE of  claim 9 , wherein the UE is preconfigured with demodulation reference signal (DMRS) scrambling sequence seed to avoid collision. 
     
     
         14 . The UE of  claim 9 , wherein the first-stage SCI and the second-stage SCI are both located inside a Physical Sidelink Control Channel (PSCCH) region. 
     
     
         15 . The UE of  claim 9 , wherein the first-stage SCI is located inside a Physical Sidelink Control Channel (PSCCH) region, and wherein the second-stage SCI is located inside a Physical Sidelink Shared Channel (PSSCH) region. 
     
     
         16 . The UE of  claim 9 , further comprising:
 an interference cancellation or suppression module that performs interference cancellation or suppression for the scheduled PSSCH based on the detected one or more first-stage SCIs.