Call connection establishing method

Abstract

The invention provides a method for setting up the call connection, comprising the following steps: a base station carries out the office-direction choice of MSC (Mobile Switching Center) by a cell identifying affiliation office-direction choice mode after receiving the call message from the terminal; the base station carries out the office-direction choice of MSC (Mobile Switching Center) by a balanced load office-direction choice mode when the cell identifying affiliation office-direction choice mode is failure; and the base station sets up the call connection with the MSC by the chosen office direction and further sets up the call connection between the terminal and the MSC after completing the office-direction choice of MSC. The invention can set up call connection in accordance with the compatibility, the calling success ratio, the link balanced load and the like.

Description

technical field [0001] The present invention relates to the communication field, and more specifically relates to a method for establishing a call connection. Background technique [0002] In the traditional networking mode of the mobile communication system, there is only one office direction of the adjacent Mobile Switching Center (MSC) of the Base Station Controller (BSC for short), such as Figure 1A shown. However, as the scale of the communication system continues to expand, each network element also develops relatively independently, and the relationship between the BSC and the MSC is no longer limited to the traditional networking method. In order to meet special needs, some new networking methods have emerged, for example, Figure 1B It shows a mode of using multi-office connections between a single BSC and a single MSC. This networking method is mainly used when the capability of a large-capacity BSC is limited by the signaling link bandwidth supported by the MSC...

AI Technical Summary

Problems solved by technology

[0004] In the case of multi-office interconnection, the problem that the upper layer software of the BSC must face is: when it is necessary to send signaling messages to the MSC, how to select the MSC office and how to choose in a flexible manner

But at the same time, the advantages of method 1 in terms of link load cannot be utilized, which will inevitably increase the complexity of the cutover project

Moreover, if the office route to which a certain cell belongs is unavailable, the call cannot be initiated, and the smooth establishment of the call cannot be guaranteed like method 1.

[0007] It can be seen that these methods have their advantages and disadvantages. How to flexibly select and use various methods and give full play to the advantages of each method has become an urgent problem to be solved by the upper layer software on the BSC side.

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