Power Allocation for Relay-Assisted TDD Cellular System with Dynamic Frequency Reuse
Power Allocation for Relay-Assisted TDD Cellular System with Dynamic Frequency Reuse
复制标题
具有动态频率复用的中继辅助 TDD 蜂窝系统的功率分配
DOI:
10.1109/twc.2012.060212.110268
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发表时间:
2012-06
影响因子:
10.4
通讯作者:
Yanfang Xu
中科院分区:
文献类型:
--
作者:
Rui Yin;Zhaoyang Zhang;Gu;ing Yu;Yu Zhang;Yanfang Xu
This paper considers the power allocation problem in a relay-assisted Time-Division-Duplex-based multiple-cell system. In such a system, the achievable data rate of each user is not only coupled with those of others due to the inherent dynamic spatial frequency reuse therein, but also coupled between consecutive time slots due to the required two-hop transmission, which results in the so-called "spatial-coupling" and "time-coupling" nature, respectively. To address both of the two coupling effects in a relay assisted TDD cellular system, we formulate an optimal power allocation problem for the asynchronous scenario of the system where different cells work independently. We observe that the problem is non-convex and NP-hard, but can be converted to Geometric Programming (GP) problems and solved by interior-point methods. In case there is no central controller and/or massive information exchange among cells is prohibitive, game theory is employed to derive the distributed solutions. Finally, we validate the proposed algorithms by extensive simulations.
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DOI:
10.2307/136062
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DOI:
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期刊:
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