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Position updating system and method for high-speed railway GSM private network

A high-speed railway and dedicated network technology, applied in network topology, network data management, electrical components, etc., can solve the problems of GSM network users' call quality degradation, complex radio wave propagation, waste of network resources, etc., and save mobile user location updates Average time, guaranteed location update success rate, and the effect of saving network resources

Inactive Publication Date: 2009-12-30
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] With the opening and construction of several passenger dedicated lines in China, the service demands of mobile users on high-speed trains such as calls are gradually increasing, and due to the complex propagation of radio waves in high-speed environments, GSM network users have problems such as the decline in call quality
The current solution is to build a high-speed private network to provide services for mobile users on the train, but at the same time it brings new problems. During the operation of the train, frequent location updates caused by high-speed movement cause a lot of signaling overhead; and due to There are a large number of mobile users on the train, and all mobile users send location update request messages to the network at the same time during location update, resulting in simultaneous location update, resulting in a large signaling overhead; in addition, even if the voice service of the high-speed private network The demand is not large, and there is no need for many frequency points to support, but in order to ensure the location update, more frequency points must be set, which wastes network resources

Method used

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  • Position updating system and method for high-speed railway GSM private network
  • Position updating system and method for high-speed railway GSM private network
  • Position updating system and method for high-speed railway GSM private network

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Embodiment 1 A position update system based on a mobile group head-based high-speed railway GSM private network, such as figure 1 and figure 2 As shown, it includes: a mobile group head fixed in the carriage and a mobile terminal with WiFi function, each carriage is equipped with a wireless local area network, and its coverage is limited inside the carriage; the mobile group head is communicated by a wireless access point and a GSM It is composed of modules, and the mobile group head has a built-in mobile group head register for storing the registration information of members in the group; the mobile terminal not only has the GSM network wireless transceiver function but also has the WiFi function, that is, access to the WLAN.

Embodiment 2

[0047] Example 2 as image 3 The shown mobile member user group establishment and group member update flowchart according to the present invention, when the passenger user gets on the bus (a group of mobile stations are gathered in a compartment), the vehicle-mounted mobile group head in the compartment is turned on, because The user and the mobile group leader have similar physical locations, and at this time, the group will be formed according to certain rules. The group formation steps are as follows:

[0048] Step 1 The AP in the vehicle-mounted mobile group head on the train sends a detection signal that the period is T to the covered wireless range (generally in a car), such as T=10min; the mobile group head register stores the mobile user of each user Identity IMSITMSI, each IMSI and TMSI are in one-to-one correspondence;

[0049] Step 2: After receiving the detection signal, the WiFi mobile terminal within the coverage area of ​​the WLAN signal in the compartment rep...

Embodiment 3

[0053] Example 3 Figure 4 and Figure 5 The group location update process of the high-speed railway GSM private network based on the present invention is described. The so-called group update is different from the user update of the traditional GSM network. In the traditional GSM network, the user location update is initiated by the user, and each update only updates the information of one user; the group update is initiated by the mobile group leader. update, and update the location information of all mobile users under the management of the mobile group head at one time. Obviously, the update efficiency of this method is much higher than the update method in the traditional GSM network.

[0054] Such as Figure 4 As shown, in this embodiment, the group location update steps based on the same MSC / VLR are as follows:

[0055] Step 1. Channel allocation is performed between the mobile group head and the network. The mobile group head sends a group location update CHANNEL RE...

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Abstract

The invention discloses a position updating system and a method for a high-speed railway GSM private network. The system comprises a mobile group header and a mobile terminal with WiFi function, wherein passengers in the same carriage form a whole body (group), and the mobile group header in the group is used as a representative of the whole group to uniformly update the position. The system and the method contribute to frequency resource conservation, reduce cost of the system on position updating, need no modification on the mobile terminal, and solve the problem of wireless resource waste of the network caused by massive position updating at the same time previously.

Description

technical field [0001] The invention relates to a position update system and method of a high-speed railway GSM special network based on a mobile group head, and belongs to the field of railway digital special mobile communication. Background technique [0002] In the first-generation and second-generation cellular mobile communication systems, the most widely used location management method is to introduce the concept of location area LA (Location Area). The location area is composed of some cellular cells, and the network is optimized by setting the number of cells included in the location area reasonably. In the existing mobile communication network, location management is carried out automatically. When the system needs to establish communication with the mobile station, it only needs to perform paging in the location area where the mobile station is located. [0003] Location update means that the mobile user reports its access cell to the mobile network so that the mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W8/02H04W60/00H04W84/12
Inventor 吴昊王涛陈霞钟章队朱刚
Owner BEIJING JIAOTONG UNIV
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