System and method for interference cancellation and/or supression on physical downlink shared channel at the user equipment

Abstract

An embodiment of methods for interference cancellation and/or suppression on a Physical Downlink Shared Channel (PDSCH) at user equipment (UE). One such method includes receiving, at the UE, a UE-specific reference signal parameter from a serving cell of a plurality of cells. The received parameters of UE-specific reference signals are used for channel estimation for serving and interference signals. The interference is canceled and/or suppressed based on the estimated channels from the UE-specific reference signals.

What is claimed is: 
     
         1 . A method for interference cancellation and/or suppression on Physical Downlink Shared Channel (PDSCH) at user equipment (UE), the method comprising:
 receiving, at the UE, a UE-specific reference signal parameter from a serving cell of a plurality of cells;   using the received parameters of UE-specific reference signals for channel estimation for serving and interference signals; and   cancelling and/or suppressing interference based on the estimated channels from the UE-specific reference signals.   
     
     
         2 . The method of  claim 1 , wherein the UE-specific reference signals for one or two layers corresponds to UE-specific RS antenna ports  11 ,  13 . 
     
     
         3 . The method of  claim 1 , wherein the UE-specific reference signals for one or two layers corresponds to UE-specific RS antenna ports  9 ,  10 . 
     
     
         4 . The method of  claim 1 , wherein the UE-specific reference signals for one or two layers corresponds to UE-specific antenna ports  7 ,  8 . 
     
     
         5 . The method of  claims 1 , further comprising dynamically switching between two or more UE-specific antenna port configurations based on downlink control information (DCI) signaling. 
     
     
         6 . The method of  claim 1 , further comprising the UE determining PDSCH resource elements based on a number of UE-specific antenna ports. 
     
     
         7 . The method of  claim 1 , further comprising receiving, by the UE, a physical resource block (PRB) bundling assumption corresponding to UE-specific reference signals of the interfering cells. 
     
     
         8 . The method of  claim 1 , further comprising configuring UE-specific reference signal parameters in response to RRC signaling. 
     
     
         9 . A method for interference cancellation and/or suppression on Physical Downlink Shared Channel (PDSCH) at user equipment (UE), the method comprising:
 receiving configuration parameters corresponding to hybrid automatic repeat requests (HARQ) soft buffer partition of an interfering signal; and   decoding the interfering signals based on the received configuration.   
     
     
         10 . The method of  claim 9  wherein the parameters of interfering signal includes at least one of ue-Category-v10xy, UE capability of supporting two spatial layers for the DL cell, or Number of HARQ processes. 
     
     
         11 . A method for interference cancellation and/or suppression on Physical Downlink Shared Channel (PDSCH) at user equipment (UE), the method comprising:
 signaling of modulation information for spatial layers of interfering signals for interference cancellation and/or suppression; and   using modulation information for spatial layers of interfering signals for interference cancellation and/or suppression.   
     
     
         12 . The method of  claim 11 , wherein the modulation information is provided per physical resource block (PRB) pair or PRB pair group. 
     
     
         13 . The method of  claim 11 , further comprising providing a physical resource block (PRB) pair with the same modulation set to the UE. 
     
     
         14 . The method of  claim 11 , further comprising signaling of no interference is provided as a part of modulation signalling.