An OFDMA-Based Subcarrier and Power Allocation Scheme in Wireless Cooperative Cellular Systems

• Published in: Wireless personal communications Vol. 48; no. 2; pp. 277 - 289
• Main Authors: Tang, Zhihua, Zhu, Youtuan, Wei, Guo, Zhu, Jinkang
• Format: Journal Article
• Language: English
• Published: Boston Springer US 01.01.2009; Springer
• Subjects: Applied sciences; Communications Engineering; Computer Communication Networks; Engineering; Equipments and installations; Exact sciences and technology; Mobile radiocommunication systems; Networks; Organization, operation and development plans; Radiocommunications; Signal,Image and Speech Processing; Systems, networks and services of telecommunications; Telecommunications; Telecommunications and information theory; Teletraffic; Transmission and modulation (techniques and equipments); Frequency diversity; Cooperative diversity; Orthogonal frequency-division multiplex access (OFDMA); Half-duplex; Subcarrier and power allocation; Performance evaluation; Relay; Wireless telecommunication; Resource allocation; Frequency division multiple access; Information rate; Cell network; Subcarrier; Power allocation; Traffic control; Uplink; Mobile radiocommunication; Orthogonal frequency-division multiplex access (OFDMA); Subcarrier and power allocation; Cooperative systems; Frequency allocation; Teletraffic; Algorithm; Information transmission; Queueing system; Traffic management; Orthogonal frequency division multiplexing; Numerical simulation; Resource management
• ISSN: 0929-6212; 1572-834X
• DOI: 10.1007/s11277-008-9522-1

An OFDMA-based subcarrier and power allocation scheme is proposed in this paper in the wireless cooperative cellular system. It is assumed that users in this system have the ability to relay information to each other to improve the overall system performance. The formulation of this scheme is to maximize the uplink system throughput subject to the half-duplex, distributed power and queue state constraints of each user. A two-slot resource allocation structure is constructed to deal with the half-duplex constraint. A low-complexity suboptimal algorithm is developed to solve the problem efficiently. This algorithm first greedily allocates subcarriers and power to users and then decides the relay selection. Numerical examples demonstrate the good throughput performance of our propose scheme and the effectiveness of the low-complexity algorithm.