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Method and device for realizing local exchange

A technology of local switching and mode conversion, applied in the field of communications, to improve user perception and customer satisfaction

Active Publication Date: 2011-06-01
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is to provide a method and device for realizing local exchange, which can compensate for the voice loss or voice overlap caused by time delay difference when switching between the local exchange mode and the traditional mode, and propose a method for the realization of local exchange An effective solution to enhance user experience

Method used

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  • Method and device for realizing local exchange
  • Method and device for realizing local exchange
  • Method and device for realizing local exchange

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0088] Embodiment 1: Design of the conversion process of the control plane of the local exchange

[0089] In the present invention, to realize local exchange, just need to realize three steps: the establishment of RTP link between base station and base station; From base station to the RTP link between base station controller handover on the RTP link between base station and base station; Release of the RTP link between the base station and the base station controller.

[0090] Step 1: Establish a new link. The BSC sends a new link establishment message to BTS1 and BTS2. The new link establishment message sent by the BSC to BTS1 includes the IP address and port number of BTS2. Similarly, the new link establishment message sent by the BSC to BTS2 includes the IP address and port number of BTS1. In this way, BTS1 and BTS2 can know each other and establish an RTP link with each other.

[0091] Step 2: A new link establishment completion indication. Note that when BTS1 activa...

Embodiment 2

[0094] Embodiment 2: Calculation of delays Δt1 and Δt2 for switching from traditional mode to local switching mode

[0095] Step 1: When MS1 ​​(first terminal) and MS2 (second terminal) establish a call, BSC sends TCH (Traffic Channel, business channel) channel activation message 101 to BTS1 (first base station) and BTS2 (second base station) and TCH channel activation message 102, record the sending time T11 and T21 respectively, and establish the communication link between BSC and BTS1, BTS2.

[0096] Step 2: When the BSC receives the channel activation confirmation messages 102 and 202 from BTS1 and BTS2 respectively, record the receiving time T12 and T22. Therefore, can calculate the Abis mouth time delay T1=(T12-T11) / 2 of BTS1 and BSC; Similarly, the Abis mouth time delay T2=(T22-T21) / 2 of BTS2 and BSC; Now BSC and BTS1, BTS2 The call links between them are established respectively. The call starts.

[0097] Step 3: When the call is established, the two telephones swit...

Embodiment 3

[0111] Embodiment 3: Conversion from local switching mode to traditional mode

[0112] Although the conversion direction is opposite to that of the second embodiment, the process is exactly the same except for individual parameter settings. Since the switching direction is from the link between BTS1 and BTS2 to the link between BTS and BSC, when sending a new link establishment message, the link establishment parameters carried are the IP and PORT information of the BSC. That is to say, to re-establish a new link with BSC. When the old link is released, the link between BTS1 and BTS2 is released. At this time, the link delays Δt1 and Δt2 do not need to be recalculated, and the values ​​calculated in the conversion from the traditional mode to the local switching mode (that is, the second embodiment) are still used, and are carried in the release old link message.

[0113] attached image 3 An application diagram of Δt under local switching is depicted.

[0114] It can be s...

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Abstract

The invention provides a method and device for realizing local exchange, wherein the method comprises: a base station controller (BSC) acquires the delay time between a first base station and the BSC and the delay time between a second base station and the BSC; when a conversation is converted from the traditional mode to a local exchange mode, the BSC acquires the link delay time from the first base station to the second base station and the link delay time from the second base station to the first base station; according to the delay time between the first base station and the BSC, the link delay time from the first base station to the second base station is subtracted so as to obtain the conversion delay time of the first base station; according to the delay time between the second base station and the BSC, the link delay time from the second base station to the first base station is subtracted so as to obtain the conversion delay time of the second base station; and the first base station and the second base station respectively receive the conversion delay time of the first base station and the conversion delay time of the second base station, then set the received switching delay time of the first base station and the conversion delay time of the second base station into new link parameters. By utilizing the method and device provided by the invention, the situation that in local exchange, the difference between the link delay time before link conversion and the link delay time after link conversion is larger.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a method and device for realizing local switching. Background technique [0002] At present, many communication systems have applied the local switching function. Local switching refers to the way that the calling and called users meet certain conditions, and their calls no longer go through the core network, but are directly carried out between the two base stations. The advantage of doing this is that it reduces the occupation of core network resources and shortens the voice transmission delay. This saves bandwidth used by the Abis port (the interface between the base station controller and the base station), and provides convenience for operators and users. The biggest feature of local switching is that user plane data is no longer transmitted through the core network, but directly between base stations. When the call is transferred in the above manner, it ca...

Claims

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Application Information

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IPC IPC(8): H04W76/00H04W88/08H04W88/12
CPCH04W36/0005
Inventor 刘强
Owner ZTE CORP
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