Switching method in long term evolution (LTE) communication system facing high speed railway and system thereof

Abstract

The invention provides a switching method in a long term evolution (LTE) communication system facing a high speed railway. The switching method is characterized in that: a source base station determines whether switching is needed according to a headstock antenna measuring report sent by a vehicle relay station; if the switching is needed, the vehicle relay station controls the headstock antenna to access to a target base station and simultaneously a tailstock antenna maintains connection with the source base station; when the tailstock antenna satisfies a switching condition, the vehicle relay station controls the tailstock antenna to access to the target base station according to the resource applied by headstock antenna in the target base station. By using the method, a large amount of users can not generate switching simultaneously. Through using a bicasting mechanism in a switching problem, switching delay can be reduced and a service quality during the switching can be guaranteed.

Description

technical field [0001] The invention belongs to the technical field of train wireless communication, and in particular relates to a method used in an LTE communication system of a high-speed railway to complete switching of a mobile device in a vehicle. Background technique [0002] With the rapid development of high-speed railway systems in my country and other Asian countries in recent years, as well as the growth of multimedia communication services, the demand for real-time, large data volume, and high transmission rate multimedia business communications in high-speed railways has become increasingly obvious. Therefore, higher requirements are put forward for the bandwidth and peak rate of the railway wireless communication system. The traditional railway-specific global wireless communication system GSM-R (Global System for Mobile Communications-Railway) can only provide simple text, voice communication, and train control information communication, which cannot meet the...

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Problems solved by technology

[0004] At present, the railway communication system mainly adopts the GSM-R system. In order to solve the problem of simultaneous switching of a large number of users in the high-speed rail communication system, a switching mechanism based on a double-layer architecture and a dual-antenna model is usually adopted, but there is no solution for the LTE system; patent Application (201010187154.8) designed a handover method based on multi-vehicle stations, but it cannot be directly used in the LTE system, and needs to design schemes, procedures, signaling, etc. for the communication system architecture and characteristics

And because the GSM-R system only supports voice and text services, the railway communication scheme based on the GSM-R system does not consider the QoS guarantee for multimedia services

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