Cell relay handover method and device

Abstract

The present invention provides a cell relay handover method and system. The method includes: judging whether the terminal is in a high-speed mobile state according to the measurement report reported by the terminal, and if so, allocating high-speed air interface resources for the terminal. The high-speed air interface resources are Refers to the physical channel resources allocated for high-speed mobile terminals; according to the measurement report reported by the terminal, determine the target cell for handover, instruct the target cell to enable the high-speed air interface resource, and monitor the signal of the high-speed air interface resource; The measurement report judges whether the bit error rate of the target cell on the high-speed air interface resource is less than a preset bit error rate, and if it is smaller, releases the wireless link of the current cell, and switches the terminal to the target cell middle. By controlling the handover process, the cells allocate high-speed air interface resources to the terminals in the high-speed mobile state, so that the terminals always run on the same physical channel resource, and realize the relay handover between the cells.

Description

technical field [0001] The invention relates to cell handover technology in a communication network, in particular to a cell relay handover method and device. Background technique [0002] In the Global System of Mobile communication (GSM for short) network, when a terminal moves from one cell to another, cell handover is required, and at the border of the cell, the signal that the terminal can receive is weak, and it is easy to A signaling loss has occurred. [0003] The cell handover technologies in the prior art are divided into hard handover, soft handover and relay handover. Among them, hard handover refers to switching the communication channel of the terminal from one wireless channel to another wireless channel under the premise of ensuring uninterrupted communication in the process of mobile communication. In the process of changing the wireless channel, it is easy to drop calls, etc. Condition. Soft handover refers to channel switching between cells when the car...

AI Technical Summary

Problems solved by technology

In the suburban environment, the coverage distance of each cell is about 1000-2000 meters. As the speed of the high-speed train becomes faster and faster, the time for the terminal to pass through a single cell is getting shorter and shorter, and the switching time during the call is getting shorter and shorter. According to the vehicle speed of 350 km / h, the terminal will pass through a cell in about 10-20 seconds, and the handover judgment (or handover preparation) of the terminal takes about 7-9 seconds. There are handover judgments in the three handover methods of the prior art The lag problem will cause the terminal to fail to switch to the ideal cell, resulting in poor call quality or call drop

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