Method for inter-cell downlink interference minimization via comp

摘要

A cell edge user central based CoMP CS JP mode selection scheme to minimize inter-cell downlink interference. According to the distribution of different types of users adaptive select optimal transmission scheme. After guaranteeing the performance of cell edge user at first, mode selection should be applied to select suitable paired users in order to increase the cell average throughput. Through carefully designing the SINR gaps and level of interference for mode selection, mode selection is a significant solution for the tradeoff between cell edge user throughput and cell average throughput and the tradeoff between performance and complexity.

主权项

1. A method in a radio communications network, the radio communications network including a plurality of radio communication cells and at least one wireless terminal served by one or more of the plurality of radio communication cells, the method comprising:
determining inter-cell downlink interference to the at least one wireless terminal; selecting, based on the inter-cell downlink interference, a selected downlink transmission mode from a set of modes comprising a single-point transmission mode and a plurality of multi-point transmission modes, wherein the single-point transmission mode is selected if the at least one wireless terminal is located in a center region of a radio communication cell and has a channel quality in a high quality range (H) and one of the plurality of the multi-point transmissions modes is selected if the at least one wireless terminal is located in an edge region of the radio communication cell and has a channel quality below the high quality range (H); using the selected downlink transmission mode to coordinate downlink radio communications with the at least one wireless terminal; and selecting a coordinated scheduling/coordinated beam-forming (CoMP CS/CB) transmission mode based on a low channel quality for the at least one wireless terminal located in the edge region of the radio communication cell and having channel quality in a low channel quality range (L1), wherein L1