Cooperative multi-point transmission method, device and system

Abstract

The invention provides a CoMP cooperative multi-point transmission method, device and system. The method comprises the steps of acquiring the reference signal receiving power (RSRP) of a user device UE measuring area; determining that the difference value between the RSRP of the first area besides a service area in the UE measuring collection and the RSRP of the second area is larger than the preset threshold value; forming a UE cooperation collection with an area having a lager RSRP in the first and second areas and the service area of UE and conducting a cooperation multi-point transmission on UE to improve the 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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