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A method for realizing private key call service and mobile switching center

A mobile switching center, private technology, applied in the cluster field, can solve the problem of no description and so on

Active Publication Date: 2012-01-04
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Under the framework of separation of call control and bearer, how to realize the bearer control of private services has not been described in the prior art

Method used

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  • A method for realizing private key call service and mobile switching center
  • A method for realizing private key call service and mobile switching center
  • A method for realizing private key call service and mobile switching center

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] In this embodiment, the MGW supports a "LoopBack" (loopback) flow mode.

[0069] In the separated gateway system, if the speaker and listener of a private call want to access the core network, they need to create corresponding endpoints and contexts on the media gateway, which are directly connected to the A-port circuits used by the speaker and listener.

[0070] Since a private call is a special group call scheduling call between two mobile terminals within the group, its group call area only includes the cell where the two parties in the private call are currently located. Although the group call area can change dynamically with the movement of the two parties in the private call, but Always only include the current cell where the calling and called mobile terminals are located. Therefore, on the media gateway, only two access endpoints need to be created at most, which are respectively used to connect the speaker terminal and the listener terminal.

[0071] 1. The ...

Embodiment 2

[0122] In this embodiment, the MGW does not support the "LoopBack" (loopback) flow mode.

[0123] In Embodiment 1, since the MGW supports the loopback streaming mode, when the speaker and the listener are located in the same cell, they share the same access endpoint, and send the media stream on the uplink channel of the endpoint back to the downlink channel of the endpoint. Because in the 29.232 specification of 3GPP, it is required not to use the LoopBack flow mode, so when the MGW does not support the loopback flow mode, another context can be used to realize the loopback of the media flow. The following describes in detail the implementation method of the private call service when the MGW does not support the loopback streaming mode. This method also includes: the establishment of the bearer between the speaker and the listener, the transfer of the speaking right of the private call, the speaker switching, and the cell reselection of the listener and other steps. The abov...

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Abstract

The invention discloses a method for implementing private call service, and aims to implement the private call service in trunking communication after the circuit domain core network is structured with call control and bearing separation. The method comprises: when the calling terminal and the called terminal are positioned in the same one cell, establishing a public access termination and a context containing the public access termination, connecting the public access termination with the calling terminal and called terminal respectively, and establishing a public access termination loop back when the media gateway can support the loop-back mode; when the he calling terminal and the called terminal are positioned in different cells, establishing the bearing from the calling terminal to the called terminal when the media gateway can support the loop-back mode. The invention also discloses a mobile switching center server and a mobile switching center. Additionally, the invention specifically discloses bearing control flows during the private call establishment process, speech right switching process, calling cell switching process, and called cell reelection process.

Description

technical field [0001] The invention relates to a trunking technology, in particular to a method for realizing a private calling service and a mobile switching center. Background technique [0002] The digital trunking system is an important branch of the mobile communication system. It is a mobile communication system that supports group dispatching and commanding. It is mainly used in professional fields such as railways, public security, and fire protection that have large-scale resource dispatching. Different from ordinary mobile communication, the biggest feature of trunking communication is that voice communication adopts PTT (PushToTalk, push-to-talk) technology. [0003] PTT refers to the "point-to-point" or "point-to-multipoint" voice communication with strong real-time performance. This business uses a half-duplex communication method, that is, only one person can speak at the same time. In order to facilitate communication, the calling party can initiate a call ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W84/08
Inventor 殷昉
Owner HUAWEI TECH CO LTD