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Method and system for dynamically packing speech frames

A voice frame, dynamic technology, applied in the field of communication, can solve the problems of affecting the voice effect, high voice quality, packet loss, etc., to achieve the effect of optimizing the voice effect

Active Publication Date: 2009-09-23
ZTE CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The AP port is the interface between BSS (Base Station System, base station controller) and MSC (Mobile Switching Center, mobile switching center) in the CDMA2000 system. Based on IP technology, it can realize single-frame and multi-frame packaging technology to transmit voice frames. The single-frame packaging technology is that an IP (Internet Protocol, Internet Protocol) packet has only one frame of voice data. The advantage of this technology is that the delay is small and the voice quality is high; The head of the TCP / IP (Transmission Control Protocol / Internet Protocol, Transmission Control Protocol / Internet Protocol) protocol stack is at least 40 bytes, and the voice load data is not as much as the head, so the bandwidth utilization is very low, and the traffic volume is relatively high It will cause packet loss, and the jitter will have a great impact on the voice quality.
Multi-frame packaging means that one IP packet has multiple voice frames. The advantages and disadvantages of multi-frame packaging technology and single-frame packaging technology are exactly the opposite. It has a higher bandwidth utilization rate and can guarantee voice quality when the traffic volume is high. The disadvantage is that it brings There is a voice delay, and if a packet is lost, a few frames will be lost, which will seriously affect the voice effect and bring a relatively large risk
[0003] The existing technology does not effectively combine the single-frame packing technology and the multi-frame packing technology

Method used

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Embodiment Construction

[0030] The present invention will be described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0031] Such as figure 1 Shown is the result block diagram of the system of the present invention, including BSS and MSC, wherein

[0032] The BSS is used to inform the MSC of the maximum number of packaged frames supported by itself; it is used to set the threshold value of its own packet loss rate, delay time, jitter time, maximum and minimum thresholds, and step size before transmitting voice frames; It is used to obtain the packet loss rate, delay time, and jitter time in the RTCP message when transmitting voice frames; it is used to judge whether the transmission network is congested; it is used to adjust the number of packaged frames;

[0033] The MSC is used to inform the BSS of the maximum number of packaged frames supported by itself; it is used to set the threshold value of its own packet loss rate, delay time, jitter time, maximum...

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Abstract

The invention relates to a method and a system for dynamically packing speech frames; the method comprises the following steps: both sides transmitting speech frames packet the speech frames in terms of single frame when no blockage occurs in the transmission network, and dynamically adjust the number of packing frames with set step-length, and packet the speech frames with the adjusted number when the blockage occurs in the transmission network; and the system comprises a base station controller and a mobile exchange center. The invention adopts single-frame packing when no blockage occurs in the network, thus guaranteeing no time delay of speech; and the invention adopts multi-frame packing when the blockage occurs, and then adopts single-frame packing again after the blockage is relieved, thus overcoming the inherent defects of single single-frame packing or multi-frame packing, and being capable of maximally optimizing the speech effect on the transmission network.

Description

technical field [0001] The invention relates to the communication field, more specifically, a method and a system for dynamically packing voice frames at an AP port in a CDMA2000 system. Background technique [0002] The AP port is the interface between BSS (Base Station System, base station controller) and MSC (Mobile Switching Center, mobile switching center) in the CDMA2000 system. Based on IP technology, it can realize single-frame and multi-frame packaging technology to transmit voice frames. The single-frame packaging technology is that an IP (Internet Protocol, Internet Protocol) packet has only one frame of voice data. The advantage of this technology is that the delay is small and the voice quality is high; The head of the TCP / IP (Transmission Control Protocol / Internet Protocol, Transmission Control Protocol / Internet Protocol) protocol stack is at least 40 bytes, and the voice load data is not as much as the head, so the bandwidth utilization is very low, and the tr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04L12/56H04L29/08H04W28/04H04W28/06H04W80/00
Inventor 陈念卢东华李平华张建刚
Owner ZTE CORP
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