Methods and devices for notifying and determining patterns of common reference signals

A method for determining common reference signal (CRS) patterns, used for determining CRS patterns in a coordinated multiple point (CoMP) transmission system, the method comprising:

• receiving first downlink control information (DCI) by UE from network to obtain an aperiodic channel status information (CSI) feedback set and a CoMP transmission scheme to be applied to the UE, wherein the COMP transmission scheme includes a plurality of possible combinations of transmission points that transmit physical downlink shared channels (PDSCH) to the UE;
• and
• receiving second DCI by the UE to obtain a CRS pattern based on the first DCI.

A device for notifying common reference signal (CRS) patterns, used for notifying CRS patterns in a coordinated multiple point (CoMP) transmission system, the device including:

• a communication module for transmitting first downlink control information (DCI) to user equipment (UE) to inform the UE an aperiodic channel status information (CSI) feedback set and a CoMP transmission scheme to be applied to the UE, and transmitting second DCI to the UE for notifying a CRS pattern to the UE based on the first DCI, wherein the CoMP transmission includes a plurality of possible combinations of transmission points that transmit PDSCH to the UE.

A device for determining common reference signal (CRS) patterns, used for determining CRS patterns in a coordinated multiple point (CoMP) transmission system, the device including:

• a communication module for receiving first downlink control information (DCI) from network to obtain an aperiodic channel status information (CSI) feedback set and a CoMP transmission scheme to be applied to the UE, and receiving second DCI to obtain a CRS pattern based on the first DCI, wherein the COMP transmission scheme includes a plurality of possible combinations of transmission points that transmit physical downlink shared channels (PDSCH) to the UE.