Optimum switching reference point selecting method based on high speed railway fixed-point switching algorithm

Abstract

In order to solve the problem of selection of optimum switching reference points of a high speed railway fixed-point switching algorithm, the invention provides an optimum switching reference point selecting method. The method comprises the steps of firstly utilizing the RSRP and the BLER calculated by the RSRP for conducting initial selection of switching reference points, then, according to the switching reference point recording obtained by a large number of measurements, establishing a probability statistics model, and analyzing and obtaining the optimum switching reference points. According to the algorithm, the rapid switching problem under the high-speed mobile environment can be solved, the times of dropped calls of the communication can be reduced, the switching success rate is improved, the service quality of the high-speed broadband mobile service can be enhanced, conducting of multimedia broadband mobile internet services in high-speed trains is promoted, and the increasingly-growing requirements of passengers for mobile communication services are met.

Description

Technical field: [0001] The present invention aims at the high-speed railway Time Division Duplex Long Term Evolution (Time-Division Duplex Long Term Evolution, TDD-LTE or TD-LTE) communication system with frequent cell handover, short handover time, and high handover success rate requirements. Based on the fast handover algorithm based on geographic location information, a method for determining the best handover reference point based on the power difference and block error rate of the source and target cell reference signals is proposed. This method can be applied to the fast handover algorithm based on geographic location information of TD-LTE, Frequency-Division Duplex Long Term Evolution (FDD-LTE or FD-LTE) communication system in the high-speed rail environment. Background technique: [0002] Generally, the handover process in the LTE system is divided into the following three steps: [0003] 1. Switch measurement (including measurement filtering, algorithm trigger me...

AI Technical Summary

Problems solved by technology

When the user terminal UE moves fast enough that the time for crossing the handover area is less than the minimum delay for the system to process the handover, the handover process cannot be completed, resulting in call drop

[0011] Due to the particularity of the high-speed railway channel environment and networking mode, the above-mentioned A3 handover judgment criterion cannot adapt to the high-speed railway environment. Due to the high-speed running of the train, the handover time is short; in addition, factors such as complex terrain and surrounding electrical equipment on the high-speed railway The channel environment will also have a great impact. Using the A3 handover judgment criterion will cause frequent handover failures, lower handover success rate, lower communication quality, and poor customer experience. Therefore, it is necessary to consider adopting a judgment criterion that adapts to the high-speed railway environment

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