A Multidimensional Resource-Allocation Optimization Algorithm for the Network-Coding-Based Multiple-Access Relay Channels in OFDM Systems

Joint scheduling and resource allocation in uplink orthogonal frequency-division multiplexing (OFDM) systems is complicated and even becomes intractable with a large subcarrier and a large user number. This paper investigates the resource allocation for OFDM-based multiuser multiple-access relay cha...

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Vydané v:IEEE transactions on vehicular technology Ročník 62; číslo 8; s. 4069 - 4078
Hlavní autori: Han, Bin, Peng, Mugen, Zhao, Zhongyuan, Wang, Wenbo
Médium: Journal Article
Jazyk:English
Vydavateľské údaje: New York, NY IEEE 01.10.2013
Institute of Electrical and Electronics Engineers
Predmet:
Applied sciences
Complexity theory
Electronic equipment and fabrication. Passive components, printed wiring boards, connectics
Electronics
Exact sciences and technology
Information, signal and communications theory
Multiple-access relay channels (MARC)
Multiplexing
Network coding
OFDM
Optimization
Organization and planning of networks (techniques and equipments)
orthogonal frequency-division multiplexing (OFDM)
Protocols
Relays
resource allocation
Resource management
Signal and communications theory
Systems, networks and services of telecommunications
Telecommunications
Telecommunications and information theory
Transmission and modulation (techniques and equipments)
Performance evaluation
Relay
Resource allocation
Optimization method
Power supply
Subcarrier
Power allocation
Optimization
Localization
Multidimensional system
Multiple-access relay channels (MARC)
Uplink
Multiple access
Packet switching
Power electronics
Scheduling
Algorithm
Polynomial time
Relay channel
Orthogonal frequency division multiplexing
Network coding
System simulation
Planning
Multiple channel
Gain
orthogonal frequency-division multiplexing (OFDM)
ISSN:0018-9545, 1939-9359
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Popis
Shrnutí:Joint scheduling and resource allocation in uplink orthogonal frequency-division multiplexing (OFDM) systems is complicated and even becomes intractable with a large subcarrier and a large user number. This paper investigates the resource allocation for OFDM-based multiuser multiple-access relay channels (MARCs) with network coding. We formulate a joint optimization problem considering source-node pairing, subcarrier assignment, subcarrier pairing, and power allocation to maximize the sum rate under per-user power constraints. The problem is solved in polynomial time by optimizing three separate subproblems. To further reduce the complexity, three low-complexity suboptimal algorithms are then proposed when fixing partial resource. The simulation results show the performance gains of the proposed algorithms versus per-node transmit power and source-node number, and the impact of relay location is also evaluated.
ISSN:0018-9545
1939-9359
DOI:10.1109/TVT.2013.2251025