Coordinated Multipoint (COMP) Techniques for Reducing Downlink Interference from Uplink Signals

摘要

Base stations (BSs) can remove inter-BS interference components from received uplink signals using downlink information communicated over a backhaul network. The downlink information is associated with downlink transmissions of neighboring base stations, and is used to remove the inter-BS interference in accordance with interference cancellation techniques, e.g., signal interference cancellation (SIC), etc. The downlink information includes information associated with downlink transmission of the interfering BSs, such as information bits (e.g., data), parity information, control information, modulation and coding scheme (MCS) parameters, forward error correction (FEC) parameters, and other information. Additionally, inter-BS interference can be suppressed using channel information of interference channels using interference suppression techniques, e.g., interference rejection combining (IRC), etc.

主权项

1. A method for removing interference from received signals, the method comprising:
transmitting, by a base station, a serving downlink transmission to a first mobile device, the base station engaged in full-duplexed communications such that uplink and downlink signals are communicated over the same time-frequency resources; receiving, by a base station, an uplink signal comprising an uplink transmission from a second mobile device and interference attributable to both the serving downlink transmission and neighboring downlink transmissions of one or more neighboring base stations, wherein the uplink transmission, the serving downlink transmission, and the neighboring downlink transmissions are communicated over the same time-frequency resources; receiving, by the base station, downlink information from the one or more neighboring base stations over a backhaul network, the downlink information corresponding to the neighboring downlink transmissions of the one or more neighboring base stations; and removing at least some of the interference from the uplink signal in accordance with both the downlink information corresponding to the neighboring downlink transmissions and the serving downlink transmission.