Self-adaptation switching method and device

Abstract

The invention provides a self-adaptation switching method and a device. The method comprises the following steps: when a high-speed train travels between two adjacent base stations BS1 and BS2, the high-speed train fits signal strength curves of the BS1 and signal strength curves of the BS2 according to signal strength information received by the BS1 and the BS2 and recorded by an empirical data self-adaptation system; intersections of the signal strength curves of the BS1 and the signal strength curves of the BS2 are confirmed, and the intersections are the optimal switching points of the high-speed train between the base stations BS1 and the BS2; and the corresponding position information of the intersections is confirmed, when the high-speed train moves to the corresponding switching areas of the intersections, switching between the base stations BS1 and the BS2 is started at an appropriate switching moment. The self-adaptation switching method and the device can confirm the optimal switching points, switching areas and switching moments.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to an adaptive switching method and device. Background technique [0002] With the construction of high-speed railways and passenger dedicated lines in my country, the wireless communication system of high-speed railways has also been greatly developed. However, since the speed of high-speed trains is basically above 250Km / h, handovers frequently occur during train operation. It has a great impact on the service quality of the system and driving safety. How to shorten the switching time and improve the switching success rate, reliability and effectiveness is a technical problem that needs to be solved in high-speed rail wireless communication. [0003] At the same time, in a mobile communication system, if the signal strength of two adjacent base stations changes drastically in a certain area, the terminal equipment will switch back and forth between the two base stati...

AI Technical Summary

Problems solved by technology

[0005] 1. The use of signal strength-based handover technology requires data measurement and processing: in a high-speed environment, due to the high-speed movement of vehicles and rapid changes in weather and terrain environments, the received signal strength changes very quickly. Switching the signal strength measurement value will cause problems such as packet loss, packet error and even communication interruption during data transmission. The accuracy of the switching will also cause the delay and lag of the switching, resulting in the interruption of the communication, and the reliability and accuracy of the switching are not high.

[0006] 2. Adopt GPS-assisted switching technology of the global positioning system: Although the use of GPS can achieve high-precision and fast positioning and effectively avoid the ping-pong effect, when the train enters tunnels, mountains, forests and other places, there is signal blocking, which may also lead to inaccurate positioning , at the same time, if the satellite fails, the GPS positioning performance will deteriorate and the handover will not be possible, making the handover less reliable and accurate

Images