MATEC Web Conf.
Volume 189, 20182018 2nd International Conference on Material Engineering and Advanced Manufacturing Technology (MEAMT 2018)
|Number of page(s)||6|
|Published online||10 August 2018|
Efficient relay selection and subcarrier assignment in cooperative OFDMA systems with QoS guarantees
College of Communications Engineering, PLA Army Engineering University, Nanjing, China
2 Jiangsu Lightning Protection Center, Nanjing, China
3 Nanjing University of Information Science & Technology, Nanjing, China
4 Guangdong Baiyun University, Guangzhou, China
* Corresponding author:email@example.com
This paper investigates relay selection and subcarrier assignment in cooperative OFDMA systems with considerations of QoS requirements. The joint resource allocation problem is formulated as a 0-1 integer linear programming problem with the objective of maximizing the system throughput. The efficient joint optimal algorithm is proposed to tackle the problem. By using the penalty function, the complicating constraints are included in the objective function and the special model with a totally unimodular constraint coefficient matrix is constructed that could be solved rapidly as a linear programming with reduced computational complexity. Numerical results show that the proposed algorithm significantly outperforms previous works in terms of both heterogeneous services support and QoS guarantees.
© The Authors, published by EDP Sciences, 2018
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