On the power of cooperation: Can a little help a lot?
On the power of cooperation: Can a little help a lot?
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论合作的力量：一点点就能有很大帮助吗？
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
T. Ho
中科院分区：
文献类型：
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作者：
Parham Noorzad;M. Effros;M. Langberg;T. Ho
本文提出了一种新的离散无记忆多址接入信道协作模型。与发射机直接协作的现有协作模型(例如，会议编码器)不同，在该模型中，发射机通过更大的网络协作。我们表明，在这种间接合作模式下，存在这样的渠道，即合作导致的和容量的增加显著大于发射机为建立合作而共享的速率。这一结果与先前模型下的合作效益的结果和网络编码文献中的结果形成对比，在网络编码文献中，试图找到类似的小网络修改产生大容量效益的例子迄今尚未成功。
In this paper, we propose a new cooperation model for discrete memoryless multiple access channels. Unlike in prior cooperation models (e.g., conferencing encoders), where the transmitters cooperate directly, in this model the transmitters cooperate through a larger network. We show that under this indirect cooperation model, there exist channels for which the increase in sum-capacity resulting from cooperation is significantly larger than the rate shared by the transmitters to establish the cooperation. This result contrasts both with results on the benefit of cooperation under prior models and results in the network coding literature, where attempts to find examples in which similar small network modifications yield large capacity benefits have to date been unsuccessful.