摘要
卫星通信在全球通信中的应用越来越多,但因受限于带宽,在沿海发达地区,突发的业务激增时常会导致信道拥塞。在实际的VoIP通话应用中出现了长时间拥塞后话音严重迟滞的现象,延迟可达10 s,且无法自行缓解,给使用者带来了极其不好的使用体验,严重影响了VoIP通信的实时性。针对VoIP在卫星环境下应用的特征,通过深入分析媒体处理原理,提出了一种适应突发拥塞的预处理方法,从而避免迟滞现象的出现,改善通话质量。
Satellite communications are increasingly used in global communication,but due to bandwidth limitations,sudden bursts of traffic often lead to channel congestion in developed coastal areas.In actual VoIP call applications;there is a serious delay in voice after a long period of congestion.The delay is up to 10 seconds,and it cannot be relieved by itself,which brings a very bad user experience and seriously affects the real-time performance of VoIP communication.Aiming at the characteristics of VoIP application in satellite environment,through in-depth analysis of media processing principle,a preprocessing method to adapt to sudden congestion is proposed to avoid the occurrence of hysteresis and improve call quality.
作者
袁健
徐凌
刘潇
YUAN Jian;XU Ling;LIU Xiao(No.30 Institute of CETC,Chengdu Sichuan 610041,China;PLA in Xi’an University of Posts and Telecommunication Co-Office,Xi’an Shaanxi 710061,China)
出处
《通信技术》
2019年第11期2713-2719,共7页
Communications Technology
关键词
VOIP
卫星
拥塞
迟滞
VoIP
satellite
congestion
hysteresis
