A wireless network handover optimization method in high-speed railway scenarios

Abstract

The invention discloses a wireless network switching optimization method in a high-speed railway scene. The invention divides the switching process into four processes: a signal measurement process, a switching parameter determination process, a switching judgment process and a switching execution process. It uses a vehicle-mounted relay station as a The intermediary of the communication between the user and the source base station, the user on the train communicates with the on-board relay station, and the on-board relay station acts as the on-board terminal to communicate with the base station. The present invention establishes a functional relationship between the switching parameter hysteresis margin value in the switching trigger condition and the current speed and position of the train, and dynamically adjusts the switching hysteresis margin through the current speed and position of the train to avoid premature switching and too late switching. At the same time, the purpose of improving the handover success rate.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a wireless network switching optimization method in a high-speed railway scene. Background technique [0002] Today, with the rapid development of high-speed railways, GSM-R cannot meet the needs of users in terms of bandwidth and data transmission speed. Compared with GSM, LTE can provide more frequency band resources and higher peak speed. Therefore, it is necessary to study the application of LTE in high-speed railway. [0003] The long-term evolution of LTE-R railway is proposed according to the characteristics of the railway network, which is suitable for the railway wireless network. It has the characteristics of a flat structure, which determines that the LTE-R network can only adopt the hard handover method, and the hard handover will inevitably cause interruption. affect the communication quality. The railway wireless network is distributed alon...

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Problems solved by technology

[0003] The long-term evolution of LTE-R railway is proposed according to the characteristics of the railway network, which is suitable for the railway wireless network. It has the characteristics of a flat structure, which determines that the LTE-R network can only adopt the hard handover method, and the hard handover will inevitably cause interruption. Affect communication quality

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