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Energy-efficient cooperative transmission over multiuser OFDM networks: who helps whom and how to cooperate

机译：多用户OFDM网络上的节能合作传输：谁来帮助谁以及如何合作

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Cooperative transmission has been shown to be able to greatly improve the system performance by exploring the broadcasting nature of wireless channels and cooperation among users. While most existing works concentrate on improving the peer-to-peer link quality, we focus, in this paper, on resource allocation among users such that the system performance can be improved. In this work, two important questions are answered: who should help whom among the distributively located users; and how the users should cooperate to improve the performance. To quantify the questions, a power management problem is formulated over a multiuser OFDM network to minimize the overall system transmit power under the constraint of each user's desired transmission rate. Then, we develop an algorithm to find solutions for a two user case. From the simulation results, the proposed scheme achieves up to 50% overall power saving for the two-user system.
机译：通过探索无线信道的广播性质和用户之间的合作，协作传输已被证明能够极大地改善系统性能。尽管大多数现有工作都集中在提高对等链路质量，但在本文中，我们集中于用户之间的资源分配，以便可以提高系统性能。在这项工作中，回答了两个重要的问题：在分布式用户中谁应该帮助谁？以及用户应如何合作以提高性能。为了量化问题，在多用户OFDM网络上制定了功率管理问题，以在每个用户所需的传输速率的约束下将整个系统的传输功率降至最低。然后，我们开发一种算法来找到针对两个用户案例的解决方案。从仿真结果来看，该方案为两用户系统实现了高达50％的总体功耗节省。

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