Can Negligihle Cooperation Increase Capacity? The Average-Error Case
Can Negligihle Cooperation Increase Capacity? The Average-Error Case
复制标题
忽视合作能否提高能力？
DOI：
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
M. Langberg
中科院分区：
文献类型：
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作者：
Parham Noorzad;M. Effros;M. Langberg
在通信网络中，协作策略是一种编码方案，其中网络节点协同工作以提高网络性能指标，例如和速率。本文研究了离散多址信道中两个编码器和一个解码器的编码器协作问题。网络中通过称为协作促进器(CF)的速率受限链路连接到两个编码器的节点启用协作策略。以前，作者提出了一类多址信道，其中平均误差和容量在CF输出链路容量趋近于零的极限内具有无限导数。作者还证明了对于某些信道，最大误差和容量在CF的输出链路容量等于零时是不连续的。这项工作表明，当CF输出链路容量收敛到零时，平均误差和容量是连续的，即平均误差和容量的无穷导数不是它不连续的结果，这与最大误差情况不同。
In communication networks, cooperative strategies are coding schemes where network nodes work together to improve network performance metrics such as sum-rate. This work studies encoder cooperation in the setting of a discrete multiple access channel with two encoders and a single decoder. A node in the network that is connected to both encoders via rate-limited links, referred to as the cooperation facilitator (CF), enables the cooperation strategy. Previously, the authors presented a class of multiple access channels where the average-error sum-capacity has an infinite derivative in the limit where CF output link capacities approach zero. The authors also demonstrated that for some channels, the maximal-error sum-capacity is not continuous at the point where the output link capacities of the CF equal zero. This work shows that the average-error sum-capacity is continuous when CF output link capacities converge to zero; that is, the infinite derivative of the average-error sum-capacity is not a result of its discontinuity as in the maximal-error case.