CQS3:一种针对移动多媒体分发的服务器选择机制

CQS3:a Server Selection Scheme for Mobile Multimedia Delivery

移动互联网的普及使得越来越多的用户通过移动终端设备访问互联网应用.虽然传统的内容分发网络能在一定程度上提高移动多媒体应用服务质量,但仍无法适应用户的移动性,不能满足高服务体验的需求.为此,提出一套移动感知多媒体服务系统,并提出了一种由客户端驱动的面向服务质量的服务器选择机制.移动终端周期性地测量移动多媒体服务质量,综合考虑边缘服务器负载和综合服务质量等级来为自身选择最佳边缘服务器.仿真结果表明:与最近代理机制相比,该机制在保证相近延迟性能的同时能显著提高PSNR,同时对用户的移动还具有较好的鲁棒性.

With the popularization of mobile Internet,more and more users get access to Internet applications through mobile terminal equipment.Although traditional content delivery network can improve the mobile service quality to a certain extent,it still can′t adapt to the mobility of users and meet the demand of higher experience of service.To this end,this paper puts forward a Mobility-Aware Multimedia System（MAMS）,and on this basis further proposes a Client-Driven QoS-Oriented Server Selection Scheme（CQS3）,in which mobile terminals measure service quality of mobile multimedia periodically,and take both the loads and comprehensive service quality grades of edge servers into consideration when selecting the best edge servers.Simulation results show that compared with closest surrogate scheme,this scheme could ensure a similar delay performance while significantly improves PSNR,and it is also well adapt to user mobility.