OFDM中继系统中能效优化的资源联合分配算法

doi:10.11959/j.issn.1000-436x.2015078

通信学报 ›› 2015, Vol. 36 ›› Issue (3): 224-231.doi: 10.11959/j.issn.1000-436x.2015078

OFDM中继系统中能效优化的资源联合分配算法

李云¹,段海霞¹,苏开荣¹,曹傧²

¹ 重庆邮电大学移动通信技术重庆市重点实验室，重庆400065
² 电子科技大学通信抗干扰国家级重点实验室，四川成都 611731

出版日期:2015-03-25 发布日期:2017-06-21
基金资助:
国家自然科学基金资助项目;重庆市杰出青年科学基金资助项目(CQCSTC);重庆邮电大学移动通信技术重庆市重点实验室基金资助项目(CSTC)

Resource assignments algorithm based on energy efficiency optimization in OFDM relay networks

Yun LI¹,Hai-xia DUAN¹,Kai-rong SU¹,Bin CAO²

¹ Chongqing Key Lab of Mobile Communications Technology, Chongqing University of Posts and Telecommunications, Chongqing 400065, China
² National Key Laboratory of Science and Technology on Communications, University of Electronic Science and Technology of China, Chengdu 611731, China

Online:2015-03-25 Published:2017-06-21
Supported by:
The National Natural Science Foundation of China;The Natural Science Foundation Project of CQCST;The Special Fund of Chongqing Key Laboratory (CSTC)

摘要/Abstract

摘要：

在协作正交频分复用系统中，合理的资源分配对于提高系统性能具有重要的意义。针对中继、子载波和功率的联合分配，对最大化系统能效为目标的分配算法进行研究，提出了一个最低容量限制下的最大能效次优化资源联合分配算法(JRAA, joint resource allocation algorithm)。该算法使用冲突图表示系统资源冲突关系，根据冲突图的最大独立集结果进行资源分配。经过仿真验证，该资源分配算法实现了中继—子载波和功率的联合分配，在能效性能方面优于现有的算法。

关键词: 资源分配, 能效, 最大加权独立集, 冲突图, 正交频分复用

Abstract:

In cooperative orthogonal frequency division multiplexing (OFDM) systems, the resource allocation rationally is significant to enhance the system performance. Aiming at maximizing the total system energy efficiency, the joint as-signment problem of relay, sub-carrier and power among users is modeled. Since the joint assignment issue subject to each user's maximal energy efficiency under minimal capacity constraints can be modeled as a NP-hard problem, a suboptimal algorithm is proposed to solve this problem. The proposed algorithm uses the conflict graph (CG) to denote the possible resource conflict relations. Then, the resource is assigned using maximal weight independent set (MWIS) algorithm. Numerical results demonstrate that the proposed algorithm (JRAA) can improve the system energy efficiency by joint assignment of relay,sub-carrier and power.

Key words: resource allocation, energy efficiency, maximum weight independent set, conflict graph, OFDM

李云,段海霞,苏开荣,曹傧. OFDM中继系统中能效优化的资源联合分配算法[J]. 通信学报, 2015, 36(3): 224-231.

Yun LI,Hai-xia DUAN,Kai-rong SU,Bin CAO. Resource assignments algorithm based on energy efficiency optimization in OFDM relay networks[J]. Journal on Communications, 2015, 36(3): 224-231.

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源用户ID	中继	第一时隙子载波ID	第二时隙子载波ID
1	57	47	30
2	71	41	18
3	83	46	9
4	30	48	5
5	69	49	25
6	23	24	37
7	47	44	42
8	40	45	43
9	56	36	21
10	84	31	35

参数名称	参数值
子信道带宽B	15 kHz
热噪声 n₀²=n₁²	-128.95 dBw
信号载频f	2 GHz
最大发送功率 P_max	5 dBw
最低信噪比γ	5 dB

OFDM中继系统中能效优化的资源联合分配算法

Resource assignments algorithm based on energy efficiency optimization in OFDM relay networks

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