QoS Aware Relay Selection and Subcarrier Allocation in Cooperative OFDMA Systems

被引：49
|
作者：
Zhang, Danhua [1 ]
Wang, Youzheng [1 ]
Lu, Jianhua [1 ]
机构：
[1] Tsinghua Univ, Dept Elect Engn, Beijing 100084, Peoples R China
来源：
IEEE COMMUNICATIONS LETTERS | 2010年 / 14卷 / 04期
关键词：
Relays; OFDMA; QoS; resource allocation; OPTIMIZATION;
D O I：
10.1109/LCOMM.2010.04.092315
中图分类号：
TN [电子技术、通信技术];
学科分类号：
0809 ;
摘要：
Most existing works on resource allocation in cooperative OFDMA systems have focused on homogeneous users with same service and demand. In this letter, we investigate relay selection and subcarrier allocation in a cooperative OFDMA system with considerations of QoS guarantees and service support. By introducing QoS price, this combinatorial problem with exponential complexity is converted into a convex one, and a dual based QoS-aware schedule (QAS) algorithm is proposed to tackle the problem. Simulation results reveal that our proposed algorithm significantly outperforms previous works in terms of both services support and QoS satisfaction.
引用
收藏
页码：294 / 296
页数：3
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