Mobile relay and its system and method for self-optimization of neighboring cells

Abstract

The invention discloses a mobile relay and a system and an adjacent region self-optimizing method thereof and belongs to the field of wireless communication. The method comprises the following steps: when the mobile relay finds that the speed of the train with the mobile relay is lower than a preset first threshold and receives the fact that a donor base station indicates that the coverage area of the donor base station can configure a dynamic adjacent region relationship in a broadcast message, an adjacent region relationship adding process is started; the mobile relay obtains the 2G or 3G adjacent region information of the donor base station through the broadcast message of the donor base station, and effective 2G or 3G adjacent regions are added into a self dynamic adjacent region list; the mobile relay establishes an adjacent region relationship with the 2G or 3G adjacent regions in the dynamic adjacent region list. Through self-sensing, self-measuring and information interaction between nodes, the mobile relay can automatically add the adjacent region relationship of LTE / 3G / 2G regions in a macro base station when the train pulls into a station and pulls out of the station. The whole process does not need artificial participation, and the operation and maintenance cost is reduced.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular to a mobile relay, its system and a method for self-optimization of adjacent cells. Background technique [0002] The main challenges faced by wireless communication scenarios in high-speed railway scenarios include: [0003] Doppler effect: When there is relative motion between the transmitter and the receiver, the Doppler effect will occur, and there will be a difference between the frequency of the signal received by the receiver and the frequency of the signal sent by the transmitter, and the frequency deviation will be This results in phase rotation of received data symbols, thereby affecting the accuracy of data demodulation. [0004] Mobility management: Compared with ordinary scenarios, high-speed mobile scenarios such as high-speed railways have a very short stay time in the coverage area of ​​each cell along the way due to the very high moving speed. Normal ...

AI Technical Summary

Problems solved by technology

[0010] 1. There are many types of adjacent cells: In order to ensure that different types of end users can experience high-speed data and voice services during high-speed rail operation, mobile relays need to support multiple air interface standards such as LTE / 3G / 2G at the same time, so each There is an optimization of the neighbor relationship between the different cells controlled by the macro base station and the mobile relay, and the high-speed rail will pass through many stops during operation, and there will be many high-speed rail stops at the station every day, so if the previous The manual configuration of the neighbor relationship will greatly increase the workload of the operation and maintenance personnel.

[0011] 2. Difficulty in obtaining train stop information: Since the operator and the railway department belong to two independent systems, it is difficult to know the running route and stop station of each train in advance, so it is impossible to pre-configure for each train or the macro base station near the platform Neighbor cell relationship or configure neighbor cell relationship for train or macro base station according to fixed time period

[0012] 3. 2G / 3G macro cells cannot perceive mobile relay cells: In the LTE standard, the discovery of neighboring cells can be carried out in the form of ANR, but the base station functions of Mobile Relay are partially deployed in the train compartment, and not only the transmission power of the mobile relay is small Moreover, the wear and tear of high-speed rail cars is very large, so it is difficult for external users to find out in advance the 2G / 3G cells in the Mobile Relay through ANR measurement to complete the self-optimization of the neighbor cell relationship.

Images