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Method and system for establishing call in switch-in process

A technology for call establishment and command establishment. It is applied in the directions of access restriction, electrical components, wireless communication, etc. It can solve the problem of waste of transmission resources and achieve the effect of reducing waste.

Inactive Publication Date: 2015-04-01
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] When both calling parties are under the same BSC during the internal handover process, and when the externally switched-in MS is under the same BSC as the calling party after switching in, it will happen that the BSC first transmits the user plane to the MGW, and the MGW then transmits the user plane to the MGW. When the user plane transmits back to the original BSC, such as image 3 As shown, resulting in a waste of transmission resources

Method used

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  • Method and system for establishing call in switch-in process

Examples

Experimental program
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Embodiment 1

[0059] According to an embodiment of the present invention, a method is provided for when both callers are served by the same BSC after the internal handover, the MSC informs the BSC that both the MS and its calling party are served by the BSC during the internal handover process Provide services. This process is an optimization of the existing internal exchange process.

[0060] Such as Image 6 , shown in 7, including:

[0061] Step 601, the MSC receives an internal handover request message;

[0062] Step 602, the MSC judges whether the call is a local call, if found to be a local call, execute step 603, otherwise, execute step 604;

[0063] Step 603, the MSC sends an internal handover command to the BSC, the internal handover command carries a local call identifier, and step 605 is performed;

[0064] Among them, in the process of establishing the calling and called calls, the MSC judges whether the call is a local call. If it is found to be a local call, the MSC uses t...

Embodiment 2

[0077] According to the embodiment of the present invention, a method is further provided, which is used to inform the BSC that the MS and its calling party are both served by the same BSC during the internal switching process when the calling party is internally handed over. The services provided by the BSC. This process is an optimization of the existing internal exchange process.

[0078] Specifically, in the process of establishing the call between the calling party and the called party, the MSC judges whether the call is a local call. If it is found to be a local call, it uses the local call identifier to identify it. The local call identifier is the Call Identifier of the calling party. The Call Identifier here is the original CallID (used to identify the A-port call carried on the IP Transport).

[0079] If the two parties in the call are in a local call after the internal handover is completed, the MSC will carry the local call identifier in the internal handover comm...

Embodiment 3

[0086] According to the embodiment of the present invention, a method is also provided, for the BSC has learned through the internal switching command that the user of the internal exchange and the calling party belong to a local call, but cannot directly allocate the same channel type and voice version as the original call To establish a local exchange, if the BSC has internal TC resources, the BSC performs voice conversion through the internal TC to meet the conditions for internal exchange. This process is an optimization of the existing internal exchange process.

[0087] Specifically, the BSC learns through the method in Embodiment 1 or Embodiment 2 that the call of the internal exchange constitutes a local call with an existing call in the BSC, but the user of the internal exchange cannot be assigned the same channel type and channel type as the calling party user. Voice version. However, the BSC has available TC resources, and through TC conversion, the channel type an...

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Abstract

The invention provides a method for call establishment in the process of handover access. When a mobile station (MS) implements the handover during a call, if the mobile switching center (MSC) judges after the handover, the MS and the called party thereof belong to a same base station controller (BSC), the MSC sends a message carrying the local call identifier to inform said BSC. Said BSC establishes the local switching for the MS and the called party thereof. Before the handover, said local call identifier has been allocated to the BSC which the MS and the called party thereof belong to. The invention further provides a system for call establishment in the process of handover access. The method of the invention establishes the local switching for the two parties of the call which after the handover belong to the same BSC, and directly transmits the user plane information of the two parties of the call without through the core network, thus the waste of transmission resources is reduced.

Description

technical field [0001] The invention relates to the field of mobile communication, in particular to a method and system for establishing a call during a cut-in process. Background technique [0002] In the existing Global System for Mobile Communications (GSM for short), A is used between the Mobile Switching Center (MSC) and the Base Station Controller (BSC). Interface for communication (A port can be carried by TDM (Time Division Multiplexing, time division multiplexing), can also be carried by IP, for the case of A port carried by IP, we call it IPA), and the mobile terminal (MobileStation, referred to as MS ) communicates with a base station (Base Station, BS for short) through an air interface Um interface; in addition, the BS and BSC are connected through an Abis interface. [0003] MS may switch during a call, including BSC internal switching and BSC external switching. Among them, the MS may switch between BTSs, cells, and channels under a BSC during a call. We cal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W36/00H04W48/18
CPCH04W36/08H04W76/021H04W76/11
Inventor 曹舜王丽涛茅非
Owner ZTE CORP