Energy efficiency-based downlink resource allocation in cognitive small cell networks

Ya-nan JIA; Dian-wu YUE

doi:10.11959/j.issn.1000-436x.2016079

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Energy efficiency-based downlink resource allocation in cognitive small cell networks

academic paper | 更新时间：2024-06-05

- Energy efficiency-based downlink resource allocation in cognitive small cell networks
- Journal of Communications Vol. 37, Issue 4, Pages: 116-127(2016)
- 作者机构：
  
  1. 大连海事大学信息科学技术学院，辽宁大连116026
  2. 杭州电子科技大学浙江省数据存储传输及应用技术研究重点实验室，浙江杭州310000
- 作者简介：
- 基金信息：
  
  The National Natural Science Foundation of China(61371091);The National Natural Science Foundation of China(61301228);The Specialized Research Fund for the Doctoral Program of Higher Education(20132125110006);The Fundamental Research Funds for the Central Universities(3132013334);The Open Research Fund of Zhejiang Provincial Key Lab of Data Storage and Transmission Technology, Hangzhou Dianzi University(201401)
- DOI：10.11959/j.issn.1000-436x.2016079
  CLC： TN929.5
- Online First：2016-04，
  
  Published：25 April 2016
- 稿件说明：
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Ya-nan JIA, Dian-wu YUE. Energy efficiency-based downlink resource allocation in cognitive small cell networks[J]. Journal of Communications, 2016, 37(4): 116-127.
DOI：

Ya-nan JIA, Dian-wu YUE. Energy efficiency-based downlink resource allocation in cognitive small cell networks[J]. Journal of Communications, 2016, 37(4): 116-127. DOI： 10.11959/j.issn.1000-436x.2016079.

摘要

在认知小蜂窝网络框架下，对基于OFDMA技术的下行联合频谱资源块和功率分配问题进行了研究。小蜂窝基站在分布式结构下采用开放式接入方式共享空闲频谱资源以最大化其能量效率，基站间的竞争关系使系统资源的动态分配过程可建模为非合作博弈模型。由于最大化具有多个限制条件的分数形势的能量效用函数属于非凸最优问题，可通过将其转化为等价的减数形势，并从串行和并行迭代的角度进行求解。在给定资源块分配策略后，原有博弈模型可被重新建模为便于独立求解发射功率的等价子博弈模型。仿真结果表明，所提算法在干扰受限的通信环境下能收敛到纳什均衡，并有效提高了系统资源利用率和能量效率。

Abstract

Joint downlink spectrum resource block(SRB) and power allocation was studied based on OFDMA n cog-nitive small cell networks.In a distributed framework

small cell base stations (SCBS) could share free spectrum re-sources with open access to maximize their energy efficiency (EE) respectively. The competition among SCBS made the dynamic resources allocation problem be modeled as a non-cooperative game. It was non-convex optimal to op-timize the EE in a fractional form under multiple interference constraints. The maximization problem was transmitted into an equivalent problem in subtractive form which could be solved from the sequential and parallel iteration points of view. After obtaining the SRB allocation strategies

the master game could be re-modeled as equivalent sub-games for solving the transmission power more easily. Simulation results show the proposed algorithm can converge to a Nash equilibrium and effectively improve system resources utilization and EE in interference-limited communication environments.

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references

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