Method of coordination multi-point transmission, control node and wireless communication device

Abstract

A method of coordination multi-point transmission is provided, which let a plurality of base stations perform communication with at least one access point of a vehicle. A first coordination multi-point set corresponding to a first position of the vehicle is obtained by looking up a database according to the first position. The first coordination multi-point set is a set of a plurality of first coordinated base stations among the plurality of base stations. A first beamforming weighted matrix correspondingly using by each of the plurality of first coordinated base stations is obtained by looking up the database. A coordination multi-point transmission is performed with the at least one access point of the vehicle by the each of the plurality of first coordinated base stations using the corresponding first beamforming weighted matrix of the each of the plurality of first coordinated base stations.

Description

technical field [0001] The invention relates to a cooperative multipoint transmission method, a control node and a wireless communication device. Background technique [0002] Railways or roads are very important transportation facilities in many countries. For example, in a high-speed railway system, the typical train speed can be as high as more than 300 kilometers per hour, and high-speed trains are generally used to serve passengers traveling long distances, so using convenient communication services in high-speed moving carriages is beneficial to Said passengers are very attractive. According to the experience of ordinary passengers on high-speed rail or vehicles traveling fast on the road, although the speed greatly saves passengers' traffic time, the rapid movement also prevents passengers from using wireless communication services freely on the vehicle. [0003] Furthermore, in a mobile environment, passengers in the vehicle often encounter situations where communi...

AI Technical Summary

Problems solved by technology

Based on the experience of ordinary passengers taking high-speed rail or vehicles traveling fast on the road, although the speed greatly saves passengers’ traffic time, the rapid movement also prevents passengers from using wireless communication services freely on the vehicle

[0003] Furthermore, in a mobile environment, passengers in vehicles often encounter situations where communication is not smooth or even interrupted

Because in a mobile environment, especially at high speed, the frequency offset caused by the Doppler effect will be very serious, and the coherent time will be quite small, which will cause difficulties in channel estimation and radio frequency signal reception

On the other hand, since railway trains or vehicles are running fast on the route, frequent handover procedures between the communication device on the train and the base station are unavoidable, and the probability of packet loss is also reduced due to frequent handover procedures. Increase

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