Facilitating interference management in multi-cell and multi-user millimeter wave cellular networks

摘要

Interference management methods are proposed to facilitate multi-cell, multi-user millimeter wave cellular networks. One method includes a feedback approach in which a base station (BS) device collects information from mobile devices in the cell operated by the BS device and other BS devices in other cells. Each mobile device feeds back a best beams set and a worst interference beams set to its serving BS device and the information is shared amongst other BS devices in the network. According to the information, BS devices implement a beam selection criterion to select a beam for downlink transmission. To reduce feedback cost, another method leverages the channel reciprocity in time division duplexing to use the measured uplink power and interference information to select the narrow beam for downlink transmission. The BS device selects the narrow beam that establishes a reliable channel and reduces interference to mobile devices in neighboring cells.