DCLA: Distributed Chunk Loss Avoidance Method for Cooperative Mobile Live Streaming
DCLA: Distributed Chunk Loss Avoidance Method for Cooperative Mobile Live Streaming
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DOI：
10.1109/aina.2015.277
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发表时间：
2015-03
期刊：
影响因子：
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通讯作者：
Kenta Mori;Sho Hatakeyama;H. Shigeno
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文献类型：
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作者：
Kenta Mori;Sho Hatakeyama;H. Shigeno
当蜂窝链路不稳定时，很难通过蜂窝电话观看高质量的实时流视频。采用蜂窝-WiFi混合网络的协作流媒体直播对带宽波动具有一定的容忍能力。属于该网络的每个用户，在P2P中称为对等体，通过其自己的蜂窝链路获得视频块，并将接收到的块广播给其他合作对等体。现有的块选择方法是随机的，并且所有对等体都尝试下载块，只要蜂窝带宽可用。然而，这种随机算法产生了大量的冗余块。在本文中，我们提出了一种新的合作块选择和损失避免方法，确定哪些对等体下载哪些块事先，并帮助对等体使用一个贫穷的蜂窝连接。我们方法的要点是它具有块选择系统和使用随机数的块丢失避免系统。每个对等点给每个块一个随机数，对等点根据随机数为块排序。对于某个块具有最大优先级的对等体尝试经由其自己的蜂窝连接下载该块。此外，如果在特定时间段过去之后没有人获得块，则不同的对等体尝试通过使用优先级来下载块。仿真结果表明，该方法可以减少蜂窝流量，并实现稳定的视频接收速率。
It is difficult to watch a high quality live streaming video by a cellular phone, when the cellular link is unstable. A cooperative live streaming using Cellular-WiFi Hybrid Network is tolerant to bandwidth fluctuation. Each user, called peer in P2P, belonging to this network gets video chunks via its own cellular link and broadcasts the received chunks to other cooperative peers. The existing chunk selection method is random and all peers try to download chunks as far as the cellular bandwidth available. However, this random algorithm makes a lot of redundant chunks. In this paper, we propose a new cooperative chunk selection and loss avoidance method which determines which peer downloads which chunks beforehand and helps the peer using a poor cellular connection. The point of our method is that it has chunk selection system and chunk loss avoidance system by using random number. Each peer gives a random number to each chunk and the peers are ordered for the chunk, according to the random number. A peer having a maximum priority for a certain chunk tries to download the chunk via its own cellular connection. Besides, if no one gets a chunk after the elapse of a certain period of time, a different peer tries to download the chunk by using the priority. Simulation results show that the proposed method can reduce cellular traffic and achieve a stable video reception rate.