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High-efficiency wireless access system RTP agent technology

A wireless access system and time stamp technology, applied in the field of RTP proxy technology, can solve the problems of large data traffic, increase of IP backhaul bandwidth and cost, limited bandwidth resources, etc., and achieve the effect of improving transmission efficiency

Inactive Publication Date: 2011-04-06
BEIJING XINWEI TELECOM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In addition, the IP backhaul data traffic between the base station and the gateway is very large, and the bandwidth resource is limited, which becomes the bottleneck of transmission bandwidth in the access network
If the RTP packets of each user are transmitted separately, the transmission efficiency will be low, which will inevitably further increase the bandwidth and cost of IP backhaul

Method used

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  • High-efficiency wireless access system RTP agent technology
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  • High-efficiency wireless access system RTP agent technology

Examples

Experimental program
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Embodiment Construction

[0020] The network structure applicable to the present invention is as figure 1 shown. The network elements of this network architecture include: a terminal (UT), a base station (BS), a gateway (SAG), and a soft switch (SS).

[0021] On the air interface between the terminal 1 and the base station 2, the terminal 1 and the base station 2 directly transmit user data as the payload of the air interface frame. Theoretically, the sender only needs to process the original media data. However, due to the complex environment of the air interface, packet loss and irregular delays are serious. A mechanism is also needed to ensure the correct transmission of media streams on the air interface. The invention adds sequence numbers to the original media packets transmitted by the air interface, and at the same time performs buffering and sorting on the receiving side, so as to ensure correct reception of media streams as much as possible. That is to say, the terminal 1 also needs to cac...

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Abstract

The invention provides a RTP agent technology which is suitable for improving the transmission efficiency of an air interface and IP backhaul when a wireless access system provides VOIP voice service. The method completes the RTP agent between a user and a soft switch core network by the cooperation of a terminal of the wireless access system, a base station, a gateway, and the like. The invention adopts the core processing that original user media packets are directly transmitted in air interface frames; multipath user data at the same base station is multiplexed into a UDP / IP packet to be transmitted by a private protocol on the wireless backhaul; and the media negotiation and the conversion of a private media data packet to a standard RTP packet are carried out on the interfaces of an access network and the core network. The RTP agent technology can improve the transmission efficiency of the air interface of the wireless access system and the IP backhaul, and can not change the interface between the access system and the soft switch core network simultaneously.

Description

technical field [0001] The present invention proposes a novel RTP proxy technology suitable for wireless access systems to improve air interface transmission efficiency of multimedia services and interface efficiency of base station return transmission. Background technique [0002] In the wireless access system using the softswitch core network, most real-time multimedia services such as VoIP and Vedio use RTP encapsulation based on the UDP transmission protocol to provide end-to-end real-time transmission. [0003] However, for voice and some chat data services, the header of each RTP / UDP / IP packet is relatively long, and the service data is relatively small. Direct transmission of RTP packets over the air interface will result in low effective utilization of wireless resources. [0004] In addition, the IP backhaul data traffic between the base station and the gateway is very large, and the bandwidth resource is limited, which becomes the bottleneck of the transmission ba...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/56H04W76/02H04W88/16
Inventor 徐广涵许瑞锋石昱舒
Owner BEIJING XINWEI TELECOM TECH