Knapsack problems: algorithms and computer implementations
Knapsack problems: algorithms and computer implementations
Cooperative diversity in wireless networks: algorithms and architectures
Cooperative diversity in wireless networks: algorithms and architectures
Convex Optimization
Power allocation in wireless multi-user relay networks
IEEE Transactions on Wireless Communications
Max-min relay selection for legacy amplify-and-forward systems with interference
IEEE Transactions on Wireless Communications
Opportunistic power scheduling for OFDMA cellular networks with scheduling at relay stations
WCNC'09 Proceedings of the 2009 IEEE conference on Wireless Communications & Networking Conference
Subcarrier selection and power allocation for amplify-and-forward relaying over OFDM links
IEEE Transactions on Wireless Communications
Subcarrier-pair based resource allocation for cooperative multi-relay OFDM systems
IEEE Transactions on Wireless Communications
Opportunistic scheduling and spectrum reuse in relay-based cellular networks
IEEE Transactions on Wireless Communications
Multinode Cooperative Communications in Wireless Networks
IEEE Transactions on Signal Processing
IEEE 802.16J relay-based wireless access networks: an overview
IEEE Wireless Communications
Cross-layer optimization for OFDM wireless networks-part II: algorithm development
IEEE Transactions on Wireless Communications
Power Control By Geometric Programming
IEEE Transactions on Wireless Communications
Distributed space-time-coded protocols for exploiting cooperative diversity in wireless networks
IEEE Transactions on Information Theory
Cooperative diversity in wireless networks: Efficient protocols and outage behavior
IEEE Transactions on Information Theory
Relay-based deployment concepts for wireless and mobile broadband radio
IEEE Communications Magazine
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This paper proposes a QoS-aware resource allocation scheme, called as cooperative resource allocation scheme (CoRA), for relay-based OFDMA systems with both QoS and Best-effort (BE) users. Using CoRA, cooperative transmission between the Base-station (BS) and the Relay-station (RS) is employed to fulfill the requirements of QoS users. Moreover, resource scheduling is allowed not only at the BS but also at each RS to fully exploit time-varying channel state and multiuser diversity, so as to achieve efficient radio resource utilization. The design of subchannel and power allocation in CoRA can be formulated as a non-linear combinatorial optimization problem, which aims at maximizing the system utility while satisfying the data rate requirements of QoS users and the separate transmission power constraints at both BS and RSs. To address the prohibitively high computational complexity in solving the optimization problem, we decompose the global optimization problem in CoRA into subchannel allocation and power control sub-problems as a suboptimal solution. Numerical results demonstrate that our proposed CoRA scheme is able to significantly improve the network performance in terms of power saving, user utilities, system throughput, as well as the number of admitted users.