Method and device for carrying out multicasting on core net EPC

Abstract

The invention provides a method for carrying out multicasting on a core net EPC and a device for carrying out multicasting on a core net EPC. A mapping relation of an IP address of a multicasting group and an IP address of a train access unit TAU is configured in the EPC. The IP address of the multicasting group is associated with a display terminal. The IP address of the TAU is associated with the TAU. The method comprises steps that the EPC receives data reports sent by a passenger information system PIS server; the data reports carry IP addresses of one or more multicasting groups; IP addresses, corresponding to the IP addresses of the one or more multicasting groups, of TAUs are searched; the data reports are sent to one or more TAU associated with the IP addresses of one or more TAUs; and the one or more TAU are used for forwarding the data reports to the display terminals associated with the IP addresses of the multicasting groups. According to the invention, it is achieved that the PIS server can directly access multiple display terminals hung under the TAUs simultaneously through the EPC.

Description

technical field [0001] The present application relates to the technical field of wireless communication, in particular to a method for performing multicast on the core network EPC and a device for performing multicast on the core network EPC. Background technique [0002] With the development of the times and the advancement of science and technology, there are more and more media and ways for people to obtain information. In the past, people almost obtained information through paper media, such as buying books or going to the library. Now, people use multimedia Ways, such as display terminals on buses and subways, can obtain various information anytime and anywhere, which is very convenient. [0003] Taking PIS (Passenger Information System) as an example, PIS is a service system that provides various information to passengers. Relying on multimedia network technology, PIS provides information services to passengers with computer systems as the core and stations and vehicl...

AI Technical Summary

Problems solved by technology

[0006] First, the EPC can only process packets whose destination address is the IP address of the TAU, that is, the PIS server cannot directly access the display terminal connected to the TAU through the EPC;

[0007] Second, EPC can only process data streams one-to-one, that is, it cannot realize one-to-many message transmission between the PIS server and the display terminals connected to multiple TAUs

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