Cooperative multi-point transmission method, device and system

Abstract

A method, a device, and a system for CoMP coordinated multi-point transmission are disclosed, where the method includes: obtaining reference signal received power RSRP of a cell in a measurement set of a user equipment UE; determining that an RSRP difference between a first cell and a second cell other than a serving cell in the measurement set of the UE is greater than a preset threshold; and combining a cell whose RSRP is greater between the first cell and the second cell with the serving cell of the UE into a coordinated set of the UE, and performing coordinated multi-point transmission on the UE, thereby improving an effect of CoMP.

Description

technical field [0001] The present invention relates to the field of network technology, and more specifically, to a coordinated multipoint transmission method, device and system. Background technique [0002] CoMP (Coordinated Multi-point Transission / reception, coordinated multi-point transmission) is one of the key technologies of LTE-A (Long Term Evolution-Advanced, the follow-up evolution of long-term evolution technology), which is used to expand the coverage of high data rates and improve The average throughput of the system can improve the performance of cell edge users. [0003] figure 1 A schematic diagram showing CoMP technology, CoMP is a cooperative transmission and reception technology, a base station (such as figure 1 eNodeB x) to connect several access points (such as figure 1 Point x in ), an access point can contain one or more antennas. Multiple users (User Equipment, UE for short) (UE x) may be served by one or more access points located in the same ba...

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Problems solved by technology

[0006] However, if CoMP is performed for all users, the implementation complexity requirements will be very high. Due to the limitation of the processing capability of the current equipment, this solution is difficult to implement in reality, and some signal-to-interference-noise ratio (SINR) is too high. Joint reception of low-level cells may lead to performance degradation due to the influence of channel estimation. Therefore, how to select a CoMP cooperating set and select which UEs to perform CoMP to achieve performance and complexity optimization becomes very important.

[0007] At present, the mainstream solution in the prior art is to determine whether to perform CoMP on the UE by using whether the difference between the RSRP (Reference Signal Receiving Power) of the serving cell and the RSRP of other adjacent cells is greater than a predetermined threshold, but this selection method Interference factors are not considered. In practice, the interference between the serving cell and other cells is often quite different. Therefore, the UE selected based on the RSRP difference between the serving cell and other cells is often not the UE that obtains the largest gain during CoMP. Reduced the effect of CoMP

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