Signaling for downlink coordinated multipoint in a wireless communication system

An apparatus to be employed by a user equipment (UE), the apparatus comprising:

• means to obtain, from an evolved Node B (eNB) via a wireless communication network, a parameter to indicate a subset of precoding matrix indicators within a codebook to be used by the UE for channel state information (CSI) reporting;
• means to generate CSI feedback for one or more CSI processes based on the parameter;
• and
• means to send the CSI feedback to the eNB.

An apparatus to be employed by a user equipment (UE), the apparatus comprising:

• one or more processors;
• and
• one or more non-transitory computer-readable media having instructions, stored thereon, that when executed by the one or more processors cause the UE to:
• detect, in a first message received from an evolved Node B (eNB), physical downlink shared channel (PDSCH) resource element (RE) parameters for a plurality of PDSCH mapping parameter sets;
• detect, in a second message received from the eNB, a two-bit value to identify a first PDSCH mapping parameter set from the plurality of PDSCH RE mapping parameter sets;
• and
• process the first PDSCH RE mapping parameter set to receive a PDSCH.