• KSII Transactions on Internet and Information Systems
    Monthly Online Journal (eISSN: 1976-7277)

Joint Relay Selection and Resource Allocation for Cooperative OFDMA Network

Vol. 6, No.11, November 30, 2012
10.3837/tiis.2012.11.015, Download Paper (Free):

Abstract

In this paper, the downlink resource allocation of OFDMA system with decode-and-forward (DF) relaying is investigated. A non-convex optimization problem maximizing system throughput with users satisfaction constraints is formulated with joint relay selection, subcarrier assignment and power allocation. We first transform it to a standard convex problem and then solve it by dual decomposition. In particular, an Optimal resource allocation scheme With Time-sharing (OWT) is proposed with combination of relay selection, subcarrier allocation and power control. Due to its poor adaption to the fast-varying environment, an improved version with subcarrier Monopolization (OWM) is put forward, whose performance promotes about 20% compared with that of OWT in the fast-varying vehicular environment. In fact, OWM is the special case of OWT with binary time-sharing factor and OWT can be seen as the tight upper bound of the OWM. To the best of our knowledge, such algorithms and their relation have not been accurately investigated in cooperative OFDMA networks in the literature. Simulation results show that both the system throughput and the users satisfaction of the proposed algorithms outperform the traditional ones.


Statistics

Show / Hide Statistics

Statistics (Cumulative Counts from December 1st, 2015)
Multiple requests among the same browser session are counted as one view.
If you mouse over a chart, the values of data points will be shown.


Cite this article

[IEEE Style]
Linshu Lv and Qi Zhu, "Joint Relay Selection and Resource Allocation for Cooperative OFDMA Network," KSII Transactions on Internet and Information Systems, vol. 6, no. 11, pp. 3008-3025, 2012. DOI: 10.3837/tiis.2012.11.015

[ACM Style]
Lv, L. and Zhu, Q. 2012. Joint Relay Selection and Resource Allocation for Cooperative OFDMA Network. KSII Transactions on Internet and Information Systems, 6, 11, (2012), 3008-3025. DOI: 10.3837/tiis.2012.11.015