Title :
Resource allocation for OFDM multiple-access relay channels with network coding
Author :
Bin Han ; Zhongyuan Zhao ; Mugen Peng ; Yong Li ; Wenbo Wang
Author_Institution :
Wireless Signal Process. & Network Lab., Beijing Univ. of Posts & Telecommun., Beijing, China
Abstract :
Joint scheduling and resource allocation in uplink orthogonal frequency division multiplexing (OFDM) systems is complicated, and even gets intractable with large subcarrier and user number. This paper investigates the resource allocation for OFDM-based multi-user multiple-access relay channels (MARC) with network coding. We formulate a joint optimization problem considering source pairing, subcarrier assignment, subcarrier pairing and power allocation to maximize the sum-rate under per-user power constraint. The problem is addressed in polynomial time by optimizing three separate subproblems, and afterwards three low-complexity suboptimal algorithms are further proposed. The simulation results demonstrate performance gain of the proposed algorithms versus per-node transmit power and source nodes number, respectively.
Keywords :
OFDM modulation; communication complexity; multi-access systems; network coding; optimisation; relay networks (telecommunication); resource allocation; scheduling; wireless channels; MARC; OFDM multiple-access relay channels; OFDM systems; OFDM-based multiuser multiple-access relay channels; joint optimization problem; joint scheduling; low-complexity suboptimal algorithms; network coding; per-node transmit power; per-user power constraint; performance gain; polynomial time; power allocation; resource allocation; source nodes number; source pairing; subcarrier assignment; subcarrier pairing; uplink orthogonal frequency division multiplexing systems;
Conference_Titel :
Global Communications Conference (GLOBECOM), 2012 IEEE
Conference_Location :
Anaheim, CA
Print_ISBN :
978-1-4673-0920-2
Electronic_ISBN :
1930-529X
DOI :
10.1109/GLOCOM.2012.6503861