On transparency of CoMP

摘要

This invention is a technique for coordinate multi-point wireless transmission between plural base stations and user equipment. At least one base station transmits via a Physical Downlink Shared CHannel (PDSCH). The user equipment does not know the identity of the plural base stations. This could include joint transmission by simultaneous data transmission from multiple base stations. This could include dynamic point selection by data transmission from one base station at a time and changing the transmitting point (TP) from one subframe to another subframe. This could include coordinated scheduling/beamforming (CS/CB) where data is transmitted to the user equipment from one base station at a time and the base stations communicate to coordinate user scheduling and beamforming. The transmission point (TP) could vary over Resource Block (RB) pairs within a subframe while never transmitting from more than one base station. The transmission point (TP) could change in a semi-static fashion.

主权项

1. A method of coordinate multi-point (CoMP) wireless transmission between a plurality of base stations and at least on user equipment comprising the steps of:
transmitting a first demodulation reference signal (DMRS) from one of the plurality of base stations; transmitting a data message to the user equipment by at least one of the plurality of base stations; receiving, through use of said first DMRS, the data message transmissions at the user equipment without the user equipment knowing the identity of the plural base stations, wherein: the step of the one of the plurality of base stations transmitting the first demodulation reference signal (DMRS) includes
a higher-layer Radio Resource Control (RRC) signaling semi-statically a first set of DMRS sequences, anddynamic signaling in a downlink grant a dynamic selection of one DMRS sequence out of the first set of configured DMRS sequences; and said first DMRS employed for receiving the data message uses said dynamically selected DMRS sequence.