Coordinated Multi-Point Transmission and Multi-User MIMO

摘要

MU-MIMO and CoMP have potentials to increase the cell capacity by many folds. Interferences and channel feedback overhead, however, severely limits such potentials. Method of reference signal-based grid of beams (RS-GOB) is described. RS-GOB distributes the effective antennas of a base station into multiple beams, thereby significantly reducing the feedback overhead of CoMP and making effective use of CoMP to turn the interferences into cooperating useful signals. RS-GOB also reduces the need for small HetNet cells, which mitigates the interferences of small HetNet cells on macro cells.

主权项

1. A method of wireless communications in a network, said network comprising at least one cell, comprising:
(a) determining a beam pattern in said cell, (b) transmitting a plurality of signal beams according to said beam pattern, each said signal beam comprising at least one beam-specific reference signal, (c) measuring the power of said signal beams by measuring the power of said beam-specific reference signal, (d) generating beam profile information, (e) establishing a gridless MIMO link between a base station of said cell and a multiantenna mobile user, said multi-antenna mobile user requesting said gridless MIMO link, (f) establishing a coordinated multipoint (CoMP) link in a CoMP set, said CoMP set comprising a plurality of CoMP base stations and a plurality of CoMP mobile users, and (g) establishing a home-beam link between said base station of said cell and a mobile user with only one dominant beam from the power measurement, said dominant beam being the home beam of said home-beam link.