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首页> 外文会议>2013 Information Theory and Applications Workshop >Multiple access and two-way channels with energy harvesting and bi-directional energy cooperation
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Multiple access and two-way channels with energy harvesting and bi-directional energy cooperation

机译：具有能量收集和双向能源合作的多路访问和双向通道

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This paper considers the multiple access and two-way channels with energy harvesting transmitters that can cooperate by transferring energy to each other. Specifically, the jointly optimal transmit power allocation and energy transfer policies that achieve the sum-capacity in both models are found. These models were first considered in previous work with unidirectional energy transfer, and optimal policies were found using a two-dimensional water-filling algorithm. In this paper, the bi-directional extension of the energy cooperation model is considered. Using an equivalent energy transfer efficiency representation, it is found that in the optimal policy, a node cannot simultaneously send and receive energy. It is shown that a class of power policies termed procrastinating policies include at least one optimal policy, leading to the insight that the resulting power allocation problem can be solved by a one-dimensional directional water-filling algorithm. It is observed that in the multiple access channel, a node either transfers no energy, or transfers all of its energy to a single user to achieve sum-capacity. For the two-way channel, the optimal policy is found to have a directional water-filling interpretation with two non-mixing fluids whenever optimal energy transfer is non-zero.
机译：本文考虑了具有能量收集发射器的多路访问和双向通道，它们可以通过相互传递能量进行协作。具体而言，找到在两个模型中均达到总容量的联合最佳发射功率分配和能量传输策略。这些模型是在以前的单向能量传递工作中首先考虑的，并使用二维注水算法找到了最佳策略。本文考虑了能源合作模型的双向扩展。使用等效的能量传输效率表示，发现在最佳策略中，节点无法同时发送和接收能量。结果表明，一类称为拖延策略的功率策略至少包括一个最优策略，这导致了一种认识，即可以通过一维定向注水算法来解决由此产生的功率分配问题。可以看出，在多路访问信道中，节点不传输任何能量，或者将其所有能量传输到单个用户以实现总容量。对于双向通道，每当最佳能量传递为非零时，发现最优策略具有两种非混合流体的定向注水解释。

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