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High-speed railway LTE system cell reselection system and method based on geographical location information

A technology for geographic location information and cell reselection, applied in wireless communication, electrical components, etc., can solve problems such as reducing network performance, and achieve the effect of reducing the number and simplifying the cell reselection process.

Inactive Publication Date: 2014-11-26
LIAONING PLANNING & DESIGNING INST OF POST & TELECOMM CO LTD
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Problems solved by technology

[0011] 3. The UE stays in the original cell for more than 1s
If there is no combination of multiple RRU cells, assuming that the train runs at 300km / h, the train will perform inter-cell reselection every 12 seconds, and frequent cell reselection will greatly reduce the performance of the network

Method used

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  • High-speed railway LTE system cell reselection system and method based on geographical location information
  • High-speed railway LTE system cell reselection system and method based on geographical location information
  • High-speed railway LTE system cell reselection system and method based on geographical location information

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Embodiment Construction

[0055] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0056] figure 1 It is a schematic diagram of LTE cell reselection in the high-speed rail scene in the present invention. According to the linear distribution of the high-speed rail, the mobile communication network along the high-speed rail is covered by a chain of dedicated cells. In order to reduce the number of reselections, the baseband unit of BBU+RRU+distribution is adopted Deployment mode of remote radio unit. Generally, three physical sites share a cell, so a cell reselection process is generally performed every three physical sites. According to the distribution form of the high-speed railway and the direction of vehicle travel, the signal in the high-speed railway needs to undergo multiple cell reselections.

[0057] Such as figure 2 As shown, the base station equipment 1 provided by the embodiment of the present invention includes:

[0058] The receiv...

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Abstract

The invention provides a high-speed railway LTE system cell reselection system and method based on geographical location information and relates to the technical field of mobile communication. The system comprises a base station arranged along a running track of a train and a vehicle-mounted device installed on the train, wherein a base station device comprises a receiving unit, a base station storage unit and a triggering judgment unit, and the vehicle-mounted device comprises a measurement unit, a sending unit, a vehicle-mounted storage unit and a control unit. According to the cell reselection method, a speed measurement result, lower than a preset threshold value, reported by the vehicle-mounted device is received on a source base station, a cell reselection process follows an R criterion, and if the speed measurement result is higher than the preset threshold value and the longitude and latitude information is consistent with data stored by the base station storage unit, the cell geographical location reselection process is started at the moment. On a high-speed moving scene, UE can fast reselect a reasonable target cell, and meanwhile it can be prevented that because of over-high running speed of a train, users can not surf the Internet.

Description

technical field [0001] The invention relates to the technical field of mobile communication, in particular to a high-speed railway communication system cell reselection system and a cell reselection method using the system. Background technique [0002] When a UE (User Equipment, referred to as UE, that is, a user terminal) is in an idle state, it needs to continuously perform cell reselection after cell selection in order to camp on a cell with higher priority or better channel quality. By setting the priorities of different frequency points, the network can achieve the purpose of controlling UE camping. At the same time, the UE will select the cell with the best quality at a certain frequency point in order to better serve it. The main purpose of cell reselection is to solve the problem of wireless coverage. [0003] In idle mode, cell reselection is triggered by monitoring the measured values ​​of the serving cell and neighboring cells. The core content of the reselect...

Claims

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Application Information

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IPC IPC(8): H04W36/00
Inventor 符新周巍王家旭王浩年徐一鸥常鹤
Owner LIAONING PLANNING & DESIGNING INST OF POST & TELECOMM CO LTD
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