Methods to support inter-enodeb comp

A method of executing inter-eNodeB (eNB) coordinated multi point (CoMP) between a CoMP user equipment (UE) and two or more CoMP eNBs, the method comprising:

• configuring the CoMP UE with a first cell radio network temporary identifier (C-RNTI) associated with a primary CoMP eNB of the two or more eNBs;
• configuring the CoMP UE with a second C-RNTI associated with a secondary CoMP eNB of the two or more eNBs;
• and
• determining, by the CoMP UE, at least one of a CoMP UE specific search space for a physical downlink control channel / enhanced physical downlink control channel (PDCCH/EPDCCH), a scrambling of a cyclic redundancy check (CRC) of the PDCCH/EPDCCH for each eNB of the two or more eNBs, or a scrambling of a physical downlink shared channel (PDSCH) for each eNB of the two or more eNBs based at least on the first C-RNTI and the second C-RNTI.

A method of allocating physical resource blocks (PRBs) between at least a first coordinated multi point (CoMP) eNodeB (eNB) and a second CoMP eNB each participating in inter-eNB CoMP joint transmission (JT) such that a first set of one or more PRBs allocated for the first CoMP eNB does not overlap with a second set of one or more PRBs allocated for the second CoMP eNB, the method comprising:

• transmitting a message, from the first CoMP eNB to the second CoMP eNB, identifying an indicated set of PRBs that the second CoMP eNB should not use to schedule data transmissions with a CoMP user equipment (UE) using the second C-RNTI;
• selecting, by the second CoMP eNB, the demodulation reference signal (DM-RS) ports for data transmission with the CoMP UE;
• and
• transmitting data, by the second CoMP eNB, to the CoMP UE using PRBs which do not comprise the indicated set of PRBs.

A method of independently allocating physical resource blocks (PRBs) by a first coordinated multi point (CoMP) eNodeB (eNB) and a second CoMP eNB participating in inter-eNB CoMP joint transmission (JT), the method comprising:

• predetermining, prior to CoMP eNB JT participation, for the first CoMP eNB a first set of demodulation reference signal (DM-RS) ports configured for data transmission with a CoMP user equipment (UE) and predetermining, prior to CoMP eNB JT participation, for the second CoMP eNB a second and different set of DM-RS ports configured for data transmission with the CoMP UE, wherein the DM-RS ports comprise ports used by at least partially overlapping physical resource blocks (PRBs);
• scheduling data transmissions by the first CoMP eNB to the CoMP UE using the first set of DM-RS ports;
• and
• scheduling data transmission by the second CoMP eNB to the CoMP UE using the second set of DM-RS ports.