基于3G网络的无线监控系统码率自适应调整算法  

Adaptive bitrate adjustment algorithm based on 3G wireless monitor system

作　　者：王来 张闯[2] 张大恒[3] 全东群[2] 陈铎[2] 

机构地区：[1]营口港务集团有限责任公司,辽宁营口115007 [2]大连海事大学航海学院,辽宁大连116026 [3]大连海洋大学航海与船舶工程学院,辽宁大连116023

出　　处：《大连海事大学学报》2015年第1期96-99,共4页Journal of Dalian Maritime University

基　　金：中央高校基本科研业务费专项资金资助项目(3132014029)

摘　　要：针对基于3G网络的无线监控系统中码率波动及丢包率的问题,在现有码率调控策略基础上,采用一种基于丢包率和视频延时进行网络状态的判定方法,并对现有的AIMD算法进行改进,使之能满足自适应调整的要求.该算法已在船舶及港口水域进行了测试,结果表明,在3G网络宽带条件下采用视频延时和丢包率来调整码率的方法,可使码率变化较大、丢包率数量较小,两者性能均得到较大改善.To solve the problems of fluctuation of bit rate and packet loss rate based on 3G network wireless monitoring sys- tem, on the basis of the existing code rate control strategy, a method based on the packet loss rate and video delay was a- dopted, and the existing AIMD algorithm was improved so as to meet the requirements of adaptive adjustment. Application results show that the algorithm can estimate the change of net- work condition correctly and limit the packet loss rate to a ver- y small scale. Comparing with the existing adaptive hitratc ad- justment algorithms, the proposed algorithm can achieve bet- ter performances in bitrate fluctuation and packet loss rate in the 3G environment.

关 键 词：3G网络 无线监控系统 码率 丢包率 自适应调整 

分 类 号：TP277[自动化与计算机技术—检测技术与自动化装置]