A fast switching method of td-lte communication system based on geographic location information

Abstract

A fast switching method for TD-LTE communication system based on geographic location information Aiming at the phenomenon of frequent cell switching in high-speed railway TD-LTE communication system, as well as the requirements of short switching time and high switching success rate, a method based on geographic location is proposed. TD-LTE fast switching method of information. According to the train's running position, speed and direction, after the network planning is completed, a list of neighboring cells is generated in advance, and the switching position of each cell switching zone is pre-set, that is, the longitude and latitude position information. When the train enters the overlapping area of ​​the two cells and arrives When the handover position is scheduled, the source base station eNodeB performs handover according to the measurement report of the user terminal UE. The method can dynamically adjust the handover method according to the mobile speed of the user terminal UE, so as to solve the problem of fast handover in a high-speed mobile environment, reduce the number of communication drops, improve the handover success rate, enhance the service quality of high-speed broadband mobile services, and promote The development of multimedia broadband mobile Internet services in high-speed railway trains meets the growing needs of passengers for mobile communication services.

Description

Technical field: [0001] The present invention aims at the high-speed railway Time-Division Duplex Long Term Evolution technology (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, and proposes a method based on TD-LTE fast handover method for geographic location information. The method can be applied to a fast handover method of a TD-LTE, Frequency-Division Duplex Long Term Evolution (FDD-LTE or FD-LTE) communication system in a 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 measurement report); [0004] 2. Switch decision (switching algorithm); [0005] 3. Switch execution; [0006] The handover measurement is completed by the user equipment (User Equipment, U...

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

Images