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首页> 外文期刊>International journal of intelligent engineering informatics >Improving spectral efficiency in cooperative cellular networks via convex optimisation
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Improving spectral efficiency in cooperative cellular networks via convex optimisation

机译：通过凸优化提高合作蜂窝网络的频谱效率

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摘要

A single base station communicating with multiple users over orthogonal channels being assisted by multiple relays is considered in this paper. Recent works have suggested that a single relaying environment is the best relaying choice in such a scenario. However, in a multiuser setting, optimal relay assignment is a combinatorial problem. Previous work, largely deals with mesh networks, addressing the problem of selection of relay, assigned to the various users using the concept of beaconing, followed by power allocation through convex optimisation. However, this increases system overhead, thereby reducing the user throughput. In this paper, we propose a unified system model, using realistic channels that not only demonstrates the efficacy of the idea proposed, but also resolves the problem of low spectral efficiency. The proposed idea uses a beacon signal only for deciding whether to use a relay or not, thereby leaving the decision of power allocation and relay assignment to the users in need, via convex optimisation.
机译：本文考虑了在多个中继的协助下，通过正交信道与多个用户通信的单个基站。最近的工作表明，在这种情况下，单个中继环境是最佳的中继选择。但是，在多用户设置中，最佳中继分配是一个组合问题。先前的工作主要涉及网状网络，解决了中继选择的问题，使用信标概念将其分配给各个用户，然后通过凸优化来分配功率。但是，这增加了系统开销，从而降低了用户吞吐量。在本文中，我们提出了一个使用现实渠道的统一系统模型，该模型不仅证明了所提出思想的有效性，而且还解决了频谱效率低的问题。所提出的想法仅将信标信号用于确定是否使用中继器，从而通过凸优化将功率分配和中继器分配的决定留给需要的用户。

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