Method, device and computer-readable storage medium for handover of vehicle-ground communication cell in tunnel

Abstract

The invention relates to the field of wireless communication, and provides an in-tunnel train-ground communication cell switching method, an in-tunnel train-ground communication cell switching apparatus and a computer readable storage medium, so as to guarantee stability of train-ground communication executed when a train-ground communication cell is switched under a tunnel environment and improvesafety of train running. The method comprises the following steps: detecting distance L ranging between a convergence terminal of the train and each ground base station in the tunnel when the train runs in the tunnel; according to the distance L ranging between the convergence terminal of the train and each ground base station in the tunnel when the train runs in the tunnel, determining the current speed V train latest of the train; when the L ranging is greater than L coverage and not greater than T maximum switching x the V train latest, initiating the switching from the ground station to which the convergence terminal currently accesses, to a destination ground base station. With the method, the apparatus and the computer readable storage medium provided by the technical scheme of theinvention, various problems caused by excessive low RSSI in the prior art can be avoided, thus, stability of communication executed when the train-ground communication cells are switched also can be kept under tunnel environment running, and safety of train running is guaranteed.

Description

technical field [0001] The invention belongs to the field of wireless communication, and in particular relates to a method, a device and a computer-readable storage medium for switching a vehicle-to-ground communication cell in a tunnel. Background technique [0002] The so-called train-to-ground communication refers to the wireless communication between the train and the ground base station. According to the wireless access form of vehicle-to-ground communication, the current vehicle-to-ground communication scheme can basically be divided into two types: multi-point access type and converged access type. In the vehicle-to-ground communication of the converged access type, cell switching is common. The field strength measurement switching mechanism is adopted, as follows: [0003] The vehicle-ground communication aggregation terminal on the train continuously detects the radio wave emission field strength (RSSI) from the currently connected ground base station and the next ...

AI Technical Summary

Problems solved by technology

[0004] The above handover mechanism can basically meet the various index requirements of handover in the general operating environment. However, when the train is running in the tunnel environment, the above handover mechanism of the train-ground communication that relies on RSSI detection will cause the business communication between the train and the ground. Large fluctuations in speed may even cause the interruption of these business communications, greatly affect the normal train-ground user business, and even endanger the safety of train operation

Images