Method for selecting cell cooperation set under CoMP

Abstract

The invention discloses a method for selecting a CoMP downlink cell cooperation set in an LTE-A system, which mainly solves the balance problem between signaling and feedback overhead required for cooperation and performance gain of the system. The method comprises the following steps of: (1) calculating signal-interference-noise ratios (SINR) of all users in a cell, and screening a user set for CoMP according to the SINR threshold; (2) picking CoMP users i to be served according to a proportional fair algorithm, and recording the service cell of the users as j; (3) selecting a candidate set according to the positions of the users i in the service cell j; (4) determining types of the users i according to the reference signal receiving power of the users i; and (5) selecting different cooperation set selecting methods according to the types of the users i. The method can reduce the scheduling complexity at the same time of ensuring the throughput gain of the system, meanwhile, optimizes the performance of two modes by adopting the different cell cooperation set selecting methods for the users in the two modes of CoMP SU-MIMO and CoMP MU-MIMO respectively, and can be used for selecting mutually cooperative cells under cooperative multi-point transmission technology.

Description

technical field [0001] The invention belongs to the technical field of mobile communication, relates to the selection of a cell coordination set, and can be used in a Coordinated Multipoint transmission (Coordinated Multi Point transmission / reception, CoMP) technology in a Long Term Evolution-Advanced (LTE-A for short) system Next, select the cell coordination set. Background technique [0002] With the development of communication services and the growth of people's needs, the future wireless communication system needs to support high speed and large capacity, but there are several problems in the existing communication system that make it difficult to achieve the performance goals of high speed and large capacity. Interference between cells is a serious problem. Because users at the edge of the cell are easily interfered by adjacent cells, the throughput of users at the cell edge is lower than that of users at the center of the cell. This problem has become a bottleneck re...

AI Technical Summary

Problems solved by technology

The above system definition method and user designation method do not distinguish the method of cell coordination set selection in the two modes, but due to the differences in interference and resource allocation in the two modes, the above system definition method and user designation method cannot be used at the same time. Optimal cell edge user performance in both modes

Images