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Transmitting important bits and sailing high radio waves: a decentralized cross-layer approach to cooperative video transmission

机译:传输重要比特并航行高无线电波:分散的跨层协作视频传输方法

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摘要

We investigate the impact of cooperative relaying on uplink multi-user (MU) wireless video transmissions. We analyze and simplify a MU Markov decision process (MDP), whose objective is to maximize the long-term sum of utilities across\udthe video terminals in a decentralized fashion, by jointly optimizing the packet scheduling and physical layer, under the assumption that some nodes are willing to act as cooperative relays. The resulting MU-MDP is a pricing-based distributed resource allocation algorithm, where the price reflects the expected future congestion in the network.\udCompared to a non-cooperative setting, we observe that the resource price increases in networks supporting low transmission rates and decreases for high transmission rates. Additionally, cooperation allows users with feeble direct signals to significantly improve their video quality, with a moderate increase in total network energy consumption \udthat is far less than the energy these nodes would require to achieve the same video quality without cooperation.
机译:我们调查协作中继对上行链路多用户(MU)无线视频传输的影响。我们分析并简化了MU Markov决策过程(MDP),其目的是通过在某些情况下共同优化分组调度和物理层,从而以分散的方式最大化整个视频终端的效用的长期总和。节点愿意充当协作中继。产生的MU-MDP是一种基于定价的分布式资源分配算法,其中的价格反映了网络中预期的未来拥堵。\ ud与非合作设置相比,我们观察到在支持低传输速率的网络中资源价格上涨了。对于高传输速率降低。另外,合作允许带有微弱直接信号的用户显着改善其视频质量,而总网络能耗的适度增加远小于这些节点在不合作的情况下实现相同视频质量所需的能量。

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