Optimized Relay Selection Strategy Based on GF(2p) for Adaptive Network Coded Cooperation

Kaibin ZHANG  Liuguo YIN  Jianhua LU  

IEICE TRANSACTIONS on Communications   Vol.E94-B    No.10    pp.2912-2915
Publication Date: 2011/10/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E94.B.2912
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
cooperative wireless network,  adaptive network coded cooperation (ANCC),  low-density parity-check (LDPC) codes,  distributed coding,  

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Adaptive network coded cooperation (ANCC) scheme may have excellent performance for data transmission from a large collection of terminals to a common destination in wireless networks. However, the random relay selection strategy for ANCC protocol may generate the distributed low-density parity-check (LDPC) codes with many short cycles which may cause error floor and performance degradation. In this paper, an optimized relay selection strategy for ANCC is proposed. Before data communication, by exploiting low-cost information interaction between the destination and terminals, the proposed method generates good assembles of distributed LDPC codes and its storage requirement reduces dramatically. Simulation results demonstrate that the proposed relay selection protocol significantly outperforms the random relay selection strategy.