Cross-layer rate control method of 3g media stream based on channel measurement

Abstract

The invention discloses a 3G media stream cross-layer rate control method based on channel measurement. According to the method, wireless channel quality is estimated through ARQ message of an RLC layer for transmission characteristics of a 3G / UMTS air interface so as to distinguish packet loss types, and a server will be used to judge the network congestion situation and adjust the sending rate according to the channel quality which is fed back and the time delay change trend by means of the time delay measurement error brought to the transmission layer caused by the RLC layer eliminating ARQ mechanism, the packet loss rate and the throughput performance have substantial characteristics and significant improvements compared with the prior art, so the method can be used to ensure that end-to-end QoS requirements of media services can be fully satisfied by the rate control.

Description

technical field [0001] The invention relates to the technical field of computer wireless communication networks, in particular to a method for controlling the cross-layer rate of 3G media streams based on channel measurement. Background technique [0002] As a cellular mobile communication technology that supports high-speed data transmission, 3G has been widely valued. In addition to supporting traditional voice services and low-speed data services, 3G is also designed to support a large number of different services, such as video telephony, video conferencing, and various multimedia services. These services have higher requirements on QoS. In order to meet the QoS requirements of emerging services, an effective end-to-end rate control method is necessary. [0003] In the wireless network environment, due to the fast time-varying nature of the wireless channel and the high bit error rate, the packet loss caused by wireless errors may account for a large proportion of the to...

AI Technical Summary

Problems solved by technology

[0003] In the wireless network environment, due to the fast time-varying nature of the wireless channel and the high bit error rate, the packet loss caused by wireless errors may account for a large proportion of the total packet loss. The TFRC protocol designed based on the wired network cannot distinguish the cause of packet loss. The wireless packet loss will be judged as congestion packet loss, thereby excessively reducing the sending rate, resulting in low network utilization

As a wired / wireless heterogeneous network, the 3G network will obviously cause obvious performance degradation if the TFRC protocol is used directly.

[0007] However, the proposed method requires the assistance and participation of the base station. If it is to be deployed, it means that the base station needs to be transformed and upgraded, which limits its application value in terms of cost investment.

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