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Rail transit wireless communication system based on TD-LTE

A wireless communication system and rail transit technology, applied in the field of rail transit radio communications, can solve problems such as inability to guarantee transmission quality, difficult tunnel maintenance, and many interference sources, achieve high data service rate and spectrum utilization, and shorten data transmission time delay and high system reliability

Pending Publication Date: 2017-09-22
NANJING PANDA ELECTRONICS +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The three services are independent and networked separately, and the cost is relatively high, and the Wi-Fi network has the following problems: there are many Wi-Fi sites, and maintenance in the tunnel is difficult; Wi-Fi high-speed mobile cannot guarantee the transmission quality, and there is no QoS (business service Quality) guarantee mechanism; Wi-Fi is naturally free and open frequency, with many sources of interference
Therefore, in terms of construction, operation, and maintenance costs, the Wi-Fi networks of TETRA and CBTC systems and the dedicated Wi-Fi networks of PIS and CCTV require high investment and need to be optimized

Method used

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  • Rail transit wireless communication system based on TD-LTE
  • Rail transit wireless communication system based on TD-LTE
  • Rail transit wireless communication system based on TD-LTE

Examples

Experimental program
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Embodiment Construction

[0025] The TD-LTE vehicle-to-ground wireless communication system includes two groups of network transmission subsystems A and B. Each transmission subsystem is mainly composed of TD-LTE core network module EPC, network management system, distributed base station eNB, and vehicle access terminal TAU. The network architecture adopts an IP-based flat network structure. The system provides channels for CBTC, vehicle-mounted PIS, vehicle-mounted CCTV, and voice and video integrated dispatching (ie, trunking dispatching) in the application layer.

[0026] The two network transmission subsystems of A and B work in a dual-network simultaneous redundant bearer mode, that is, there is no distinction between A and B dual-network services, and they carry service data at the same time, providing communication channels for each service end of the application layer. In each transmission subsystem, the TD-LTE core network module EPC and network management system are located at the core layer...

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Abstract

The invention discloses a rail transit wireless communication system based on TD-LTE. The rail transit wireless communication system adopts flat network architecture based on IP and comprises two groups of network transmission subsystems A and B for providing communication channels for service terminals of an application layer, wherein the two groups of network transmission subsystems A and B work in a double-network simultaneous redundant bearing mode; each network transmission subsystem comprises a TD-LTE core network module EPC and a network management system located on a core layer, a distributed base station eNB located on an access layer, and a vehicular access terminal TAU located on a terminal layer. The system has perfect TD-LTE network interconnection and intercommunication interface and function, has access bearing capability of a plurality of services, and can provide reliable and redundant transparent transmission channels that can be flexibly reconfigured for service application systems.

Description

technical field [0001] The invention belongs to the technical field of rail transit radio communication, and in particular relates to a TD-LTE-based rail transit wireless communication system. Background technique [0002] At present, the wireless communication technologies used in the urban rail transit industry mainly include TETRA (Terrestrial Trunked Radio), GSM (Global System for Mobile Communications), CDMA (Code Division Multiple Access), 3G (Third Generation Mobile Communication Technology), Wi- Fi (wireless local area network), etc., can be divided into commercial wireless communication, private wireless communication and train wireless communication according to application. Among them, the professional wireless communication business is mainly divided into three parts: the voice dispatching business represented by TETRA, the Wi-Fi network that guarantees the CBTC (communication-based train automatic control system), the on-board PIS (passenger information system) ...

Claims

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Application Information

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IPC IPC(8): H04L29/08H04W4/00H04L1/22
CPCH04L1/22H04L67/1095H04L67/12
Inventor 王洪波
Owner NANJING PANDA ELECTRONICS
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