Title :
Dynamic Resource Allocation in OFDMA Systems with Full-Duplex and Hybrid Relaying
Author :
Ng, Derrick Wing Kwan ; Schober, Robert
Abstract :
In this paper, we formulate a joint optimization problem for resource allocation and scheduling in full-duplex orthogonal frequency division multiple access (OFDMA) relaying systems with amplify-and-forward (AF) and decode-and-forward (DF) relaying protocols. Our problem formulation takes into account heterogeneous data rate requirements for delay sensitive users. Besides, a theoretically optimal hybrid relaying, which allows a dynamic selection between AF relaying and DF relaying protocols with full-duplex relays or half-duplex relays, is also considered in the problem formulation and serves as a performance benchmark. A dual decomposition method is employed to solve the resulting optimization problem and a novel distributed iterative resource allocation and scheduling algorithm with closed-form power and subcarrier allocation is derived. Simulation results illustrate that the proposed distributed algorithm requires only a small number of iterations to achieves practically the same performance as the optimal centralized algorithm.
Keywords :
OFDM modulation; amplify and forward communication; decode and forward communication; distributed algorithms; frequency division multiple access; iterative methods; protocols; resource allocation; scheduling; OFDMA systems; amplify-and-forward relaying protocols; closed-form power allocation; decode-and-forward relaying protocols; delay sensitive users; distributed algorithm; distributed iterative resource allocation; dual decomposition method; dynamic resource allocation; full-duplex orthogonal frequency division multiple access relaying systems; half-duplex relays; heterogeneous data rate; joint optimization problem; optimal centralized algorithm; optimal hybrid relaying; scheduling algorithm; subcarrier allocation; High definition video; Interference; Mobile communication; Optimization; Relays; Resource management; Throughput;
Conference_Titel :
Communications (ICC), 2011 IEEE International Conference on
Conference_Location :
Kyoto
Print_ISBN :
978-1-61284-232-5
Electronic_ISBN :
1550-3607
DOI :
10.1109/icc.2011.5962906