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A seamless switching method and system for a vehicle access unit

A technology of access unit and seamless handover, which is applied in the field of communication, can solve problems such as the inability of vehicle-mounted access units to work normally, and achieve the effect of seamless handover, avoiding loss, and avoiding interference

Active Publication Date: 2019-05-07
CRSC RESEARCH & DESIGN INSTITUTE GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the above technical problems, the embodiments of the present application provide a seamless switching method and system for vehicle access units, so as to realize full power takeover of the target line to the vehicle access unit, and to avoid failure of the source PGW of the source line, resulting in The purpose of the situation where the on-board access unit switched to the target line cannot work normally, the technical solution is as follows:

Method used

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  • A seamless switching method and system for a vehicle access unit
  • A seamless switching method and system for a vehicle access unit
  • A seamless switching method and system for a vehicle access unit

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0067] In this embodiment, a method for seamless switching of a vehicle access unit is provided, which is applied when the vehicle access unit is switched from the EPC of the source line to the EPC of the target line, wherein the source line is the EPC to which the vehicle access unit belongs. Subway line or railway line, the target line is a certain subway line or a certain railway line other than the source line.

[0068] See figure 1 , which shows a flow chart of the seamless switching method of the vehicle access unit provided by the present application, which may include the following steps:

[0069] Step S11: the target SGW in the EPC of the target line establishes an uplink data channel with the source PGW in the EPC of the source line, and the source PGW establishes a downlink data channel with the target SGW.

[0070] When the vehicle-mounted access unit switches from the EPC of the source line to the EPC of the target line, the characteristics of the vehicle-mounted...

Embodiment 2

[0162] Corresponding to the seamless switching method of the vehicle-mounted access unit shown in the first embodiment, this embodiment provides a seamless switching system of the vehicle-mounted access unit, which is applied to the mobile communication network EPC of the vehicle-mounted access unit from the source line When switching to the EPC of the target line, see Figure 9 , the seamless handover system of a vehicle access unit includes: a vehicle access unit 91 , a target MME92 , a target PGW93 , a target SGW94 , a target base station 95 and a source PGW96 .

[0163] The vehicle access unit 91 is configured to send a PDN connection establishment request carrying the target APN to the target mobility management entity MME in the EPC of the target line.

[0164] The target MME92 is configured to analyze the target APN in the PDN connection establishment request, obtain the ID of the PGW in the EPC of the target line, and send a session establishment request carrying the I...

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Abstract

The invention provides a seamless switching method and system for a vehicular access unit. By means of the seamless switching method for the vehicular access unit, on the basis of establishing an uplink data channel and a downlink data channel between a target SGW (Serving Gateway) and a source PGW (PDN Gateway), an uplink data channel and a downlink data channel can also be established between the target SGW and a target PGW; a data channel of the vehicular access unit is obtained by establishing; the data channel comprises both-way communication of the vehicular access unit, a target base station, the target SGW, the target PGW and an application server in an EPC (Evolved Packet Core)of a target line in sequence; full-authority take-over of the vehicular access unit by the target line is realized; the phenomenon that the vehicular access unit switched to the target line cannot normally work when the source PGW in a source line has a failure can be avoided, such that interference to operation of the target line is avoided; furthermore, loss of communication data is prevented; and seamless switching for communication of the vehicular access unit is realized.

Description

technical field [0001] The present application relates to the communication field, in particular to a method and system for seamless switching of vehicle access units. Background technique [0002] At present, in the field of rail transit, each subway line or railway line has its own dedicated EPC (Evolved Packet Core, mobile communication network) network and each railway bureau has its own dedicated EPC network, and the vehicle access on the subway or train The unit takes the dedicated EPC network of the subway line or railway line it belongs to as the home network. When the vehicle-mounted access unit is operating across lines and offices, in order to clarify responsibilities, it is interconnected with other rail transit data networks to reduce the impact of the failure of the home network on other lines or railway bureaus. After the EPC of the line (that is, the subway line or railway line to which the vehicle access unit belongs) is switched to the EPC of the target li...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W36/00H04W36/18
CPCH04W36/18H04W48/16H04W76/10
Inventor 师进王伟吉萌
Owner CRSC RESEARCH & DESIGN INSTITUTE GROUP CO LTD