SYSTEM AND METHOD FOR INTERFERENCE CANCELLATION AND/OR SUPRESSION ON PHYSICAL DOWNLINK SHARED CHANNEL AT THE USER EQUIPMENT
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.
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.