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首页> 外文期刊>Mobile Computing, IEEE Transactions on >Effective Video Multicast Using SVC with Heterogeneous User Demands over TDMA-Based Wireless Mesh Networks
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Effective Video Multicast Using SVC with Heterogeneous User Demands over TDMA-Based Wireless Mesh Networks

机译：在基于TDMA的无线网状网络上使用SVC和异类用户需求进行有效的视频组播

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摘要

We provide an effective video multicast framework over time division multiple access (TDMA)-based wireless mesh networks (WMNs). Heterogeneous user demand is considered where each multicast receiver has its own video quality demand. In video multicasting, different relay nodes in the same multicast tree may have different transmission rates by utilizing scalable video coding (SVC). Considering this distinguishing characteristic of video multicasting, the proposed multicast framework provides effective multicast routing, scheduling, and rate allocation algorithms. The purpose of the multicast routing and scheduling is to obtain a minimum length schedule which satisfies given quality demands of receivers. If the schedule is not feasible even with its minimum length due to the limited number of time slots in the network, rate allocation algorithm adjusts the transmission rates of relay nodes to generate a feasible schedule. The algorithm is designed to maximize the minimum utility of multicast receivers. Simulation results show that the proposed multicast routing and scheduling algorithms outperform existing schemes in terms of schedule length. The minimum utility is improved up to 30 percent by the proposed rate allocation algorithm compared to the existing method.
机译：我们提供了基于时分多址（TDMA）的无线网状网络（WMN）的有效视频多播框架。在每个多播接收器都有其自己的视频质量需求的情况下，应考虑异构用户需求。在视频多播中，通过利用可伸缩视频编码（SVC），同一多播树中的不同中继节点可能具有不同的传输速率。考虑到视频组播的这一独特特征，提出的组播框架提供了有效的组播路由，调度和速率分配算法。多播路由和调度的目的是获得满足接收器给定质量要求的最小长度调度。如果由于网络中的时隙数量有限，即使调度表即使具有最小长度也不可行，则速率分配算法会调整中继节点的传输速率以生成可行的调度表。该算法旨在最大化多播接收器的最小效用。仿真结果表明，所提出的组播路由和调度算法在调度长度方面优于现有方案。与现有方法相比，建议的速率分配算法将最小效用提高了30％。

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