Patent ID: 9736785
Date: 2017-08-15
CPC Classifications: H04B,H04L,H04W

Claim:
1. A communications method implemented in a communications node working in a full duplex mode and used in a wireless communications system, the communications method comprising: receiving, from a plurality of transmitting nodes, first communications data; simultaneously with the receiving, transmitting to a plurality of receiving nodes, second communications data; and deciding at least part of the transmit precoders and receive filters for alignment of interference from the plurality of transmitting nodes to the plurality of receiving nodes, wherein the precoders and receive filters for said alignment employ a full bipartite interference channel (FBIC), the FBIC including a single access point node that provides downlink channels to the plurality of receiving nodes, and the single the access point node also provides uplink channels to the FBIC, the first communications data having a number of streams less than the second communications data to provide a greater number of degrees of freedom for streams of second communications data that is interference free provided from the FBIC through the downlink channels to the plurality of receiving nodes; wherein the number of the plurality of receiving nodes is limited up to 2, and the number of the plurality of transmitting nodes is limited up to 2 and wherein the communications node includes N antennas, the plurality of transmitting nodes use N/2 out of N degrees of freedom, and the plurality of receiving nodes use N/2 out of N degrees of freedom; and wherein the communications node simultaneously receives and transmits from greater than zero to a maximum number of 2N streams.