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首页> 外文期刊>IEEE Transactions on Information Theory >Myopic Coding in Multiterminal Networks
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Myopic Coding in Multiterminal Networks

机译：多终端网络中的近视编码

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摘要

This correspondence investigates the interplay between cooperation and achievable rates in multiterminal networks. Cooperation refers to the process of nodes working together to relay data toward the destination. There is an inherent tradeoff between achievable information transmission rates and the level of cooperation, which is determined by how many nodes are involved and how the nodes encode/decode the data. We illustrate this tradeoff by studying information-theoretic decode–forward-based coding strategies for data transmission in multiterminal networks. Decode-forward strategies are usually discussed in the context of omniscient coding, in which all nodes in the network fully cooperate with each other, both in encoding and decoding. In this correspondence, we investigate myopic coding, in which each node cooperates with only a few neighboring nodes. We show that achievable rates of myopic decode–forward can be as large as that of omniscient decode–forward in the low signal-to-noise ratio (SNR) regime. We also show that when each node has only a few cooperating neighbors, adding one node into the cooperation increases the transmission rate significantly. Furthermore, we show that myopic decode–forward can achieve nonzero rates as the network size grows without bound.
机译：该对应关系调查了多终端网络中合作与可达到的速率之间的相互作用。合作是指节点协同工作以将数据中继到目的地的过程。在可实现的信息传输速率与协作级别之间存在固有的权衡，这取决于所涉及的节点数以及节点如何对数据进行编码/解码。我们通过研究用于多终端网络中数据传输的信息理论解码-基于前向的编码策略来说明这种权衡。解码转发策略通常在全知编码的背景下进行讨论，其中网络中的所有节点在编码和解码方面都充分相互协作。在这种对应关系中，我们研究了近视编码，其中每个节点仅与几个相邻节点协作。我们表明，在低信噪比（SNR）的情况下，近视解码的可实现速率与全能解码的可实现速率一样大。我们还表明，当每个节点只有几个协作邻居时，在协作中添加一个节点会大大提高传输速率。此外，我们表明，随着网络规模的不断扩大，近视解码可以实现非零速率。

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