摘要
针对3G网络视频传输,提出一种应用层的服务质量(quality of service,QoS)控制方法.该方法采用线性预测算法计算丢包率,并引入严增松减等步长拥塞控制算法对视频输出码率进行自适应调节.实验结果表明,端到端延迟时间和延迟时间抖动等QoS控制参数均符合通信行业对实时业务的指标要求,同时网络利用率也得以提高.该QoS控制方法适用于3G网络视频传输,具有良好的可行性和实用性.
In this paper, an application-layer QoS（quality of service） control method for real-time video transmission based on 3G network is proposed. This method calculates packet loss rate using a linear prediction algorithm, and it introduces a self-designed SILD （ strict increase loose decrease） congestion control algorithm to adjust the transmission bit rate of video streams. Experimental results show that the performance parameters, such as transmission delay and jitter, meet the industrial standard requirements and that the utilization of network bandwidth is improved. Therefore, the proposed QoS control method is suitable for real-time video transmission over 3G network and has good practicality and feasibility.
出处
《中国科学院大学学报（中英文）》
CAS
CSCD
北大核心
2014年第1期117-123,共7页
Journal of University of Chinese Academy of Sciences
基金
国家自然科学基金(61032006
61271282)
国家科技重大专项(2010ZX03002-008-01)资助
