Potential Games for Energy-Efficient Power Control and Subcarrier Allocation in Uplink Multicell OFDMA Systems
Potential Games for Energy-Efficient Power Control and Subcarrier Allocation in Uplink Multicell OFDMA Systems
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DOI：
10.1109/jstsp.2011.2177069
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发表时间：
2012-04-01
影响因子：
7.5
通讯作者：
Zappone, Alessio
中科院分区：
文献类型：
--
作者：
Buzzi, Stefano;Colavolpe, Giulio;Zappone, Alessio
研究了多小区上行正交频分多址（OFDMA）系统中的非协作资源分配问题。非合作游戏的子载波分配和发射功率控制被认为是，旨在最大限度地提高用户的信干噪比，最值得注意的是，用户的能源效率，测量位/焦耳，并表示无差错的传输位的数量为每个焦耳的能量用于传输。利用势对策理论，给出了几种允许纳什均衡点的非合作对策。由于所提出的资源分配游戏表现出的计算复杂性，在某些情况下可能是禁止的，近似的，降低复杂性，实现也被考虑。为了比较的目的，社会最优解的一些考虑也进行了讨论。数值结果证实，所提出的资源分配方案是有效的，在提高网络的能源效率（相比，速率最大化计划），从而允许优化使用的能量存储在电池中。此外，所提出的近似实现表现出非常接近的确切程序的性能。
The problem of noncooperative resource allocation in multicell uplink orthogonal frequency division multiple access (OFDMA) systems is considered in this paper. Noncooperative games for subcarrier allocation and transmit power control are considered, aiming at maximizing the users' SINRs and, most notably, the users' energy efficiency, measured in bit/ Joule and representing the number of error-free delivered bits for each Joule of energy used for transmission. The theory of potential games is used to come up with several noncooperative games admitting Nash equilibrium points. Since the proposed resource allocation games exhibit a computational complexity that may be in some cases prohibitive, approximate, reduced-complexity, implementations are also considered. For comparison purposes, some considerations on social-optimum solutions are also discussed. Numerical results confirm that the proposed resource allocation schemes are effective in increasing the network energy efficiency (as compared to rate-maximizing schemes), thus permitting to optimize the use of the energy stored in the battery. Moreover, the proposed approximate implementations exhibit a performance very close to that of the exact procedures.