CAJ | 학술논문

随着移动互联网和三网融合的兴起，网络带宽及终端异构性造成所选节点视频和请求节点的终端能力不匹配。为此，提出一种基于可扩展视频编码(SVC)分层匹配度的节点选择算法。在异构网络背景下，综合考虑节点带宽和链路往返时延，将 SVC分层层数和网络接入类型相结合。实验结果表明，与随机选择算法相比，该算法使得所选节点的SVC视频分层数与请求节点终端处理能力有较高的匹配度(固网、无线、3G接入网络类型所对应的匹配度分别为77.8，72.2，88.9)，并且具有较高的终端平均服务能力(PC为110、笔记本为78.3、手机为38.3)。
수착이동호련망화삼망융합적흥기，망락대관급종단이구성조성소선절점시빈화청구절점적종단능력불필배。위차，제출일충기우가확전시빈편마(SVC)분층필배도적절점선택산법。재이구망락배경하，종합고필절점대관화련로왕반시연，장 SVC분층층수화망락접입류형상결합。실험결과표명，여수궤선택산법상비，해산법사득소선절점적SVC시빈분층수여청구절점종단처리능력유교고적필배도(고망、무선、3G접입망락류형소대응적필배도분별위77.8，72.2，88.9)，병차구유교고적종단평균복무능력(PC위110、필기본위78.3、수궤위38.3)。
The rise of the mobile Internet and tri-networks integration brings a huge challenge to select resource peer for the requesting peer services in the Peer to Peer(P2P) streaming system. The video of the selected peer does not match terminal capabilities of the requesting peer because of network bandwidth and terminal heterogeneity. To solve this problem, a peer selection algorithm based on Scalable Video Coding(SVC) layering matching degree is proposed. Under the background of heterogeneous network, this algorithm combines the SVC layering layers and network access types, with a comprehensive consideration of peer bandwidth and link round-trip delay. Experimental results show that compared with the random selection algorithm, this algorithm contributes to a higher degree of matching SVC video layer of the selected peer with the terminal handling capacity of the requesting peer(the corresponding matching degrees of fixed network, wireless, 3G access network are 77.8, 72.2, and 88.9) and a higher terminal average service(PC is 110, notebook is 78.3, and mobile is 38.3).