Overhand optimization method for GSM-R network

A handover, GSM-R technology, applied in electrical components, wireless communication, etc., to improve reliability, simplify lists, improve success rate and efficiency

Inactive Publication Date: 2009-07-15
BEIJING JIAOTONG UNIV
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[0018] The invention proposes a method for optimizing GSM-R network handover. According to the linear coverage characteristics of the railway GSM-R network, in the case of single-network coverage, there are only two adjacent cells. If you know the moving direction of the train, you can determine the target cell for handover, thereby simplifying the list of target cells . The present invention proposes a method for determining the direction of train movement, that is, the BSC handover record statistical method, which tracks the first few handovers of a certain user at the BSC, and records the previous N times (N≥3) handovers of the user in turn. The handover target cell corresponds to the sequential list of cells stored in the BSC along the network direction within its coverage area, so that the running direction of the train can be determined.

[0019] For each MS, the BSC must perform the following operations when performing handover judgment:

[0020] a. Before each MS ent...

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Abstract

The invention discloses a method for optimizing GSM-R network cross-zone switching. According to the thread coverage characteristic of a railway GSM-R network, under a situation only single network coverage is considered, adjacent districts only have two, that is, a front one and a back one, if the motion direction of a train is affirmed, a switching target district can be determined, thus simplifying a target district list. The invention puts forward a method for determining the motion direction of the train, namely, a BSC switching recording statistical method, which refers to that the previous switching of one special user at the BSC is tracked, the target districts switched orderly by the user in previous N (N is more than and equal to 3) times switching are recorded, and the motion direction of the train is judged according to the order list of districts which are stored in the coverage area of the BSC and follow the network direction. Therefore, a newly obtained switching adjacent district list can simplify switching process, shortening switching time, improving switching reliability, solving the toggle switching problem of districts within the network, and meanwhile avoiding the phenomenon of backward switching.

Description

technical field [0001] The invention relates to a GSM-R network handover optimization method, which belongs to the field of mobile communication. Background technique [0002] In the GSM-R system, the radius of the cell is relatively small, and the train runs at high speed along the railway line, and a call will undergo multiple handoffs. During the call, the mobile station is responsible for measuring the downlink performance of the wireless subsystem and the signal strength of the surrounding cells. The base station regularly measures and evaluates the signal of the mobile station. When an abnormal situation is detected, the base station immediately reports to the MSC (Mobile Switching Center) Or BSC (base station controller) sends out an alarm signal, MSC or BSC will look for a new cell or a new channel, and send a handover after finding it; otherwise, the communication will continue on the original channel, and at the same time, the process of trying to handover is perio...

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Application Information

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IPC IPC(8): H04W36/08
Inventor 钟章队朱刚任静丁珣杨焱蒋文怡许荣涛武贵君
Owner BEIJING JIAOTONG UNIV
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