On the Performance Analysis of Network-Coded Cooperation in Wireless Networks

—In this letter, a network-coded cooperation scheme with dynamic coding mechanism (DC-NCC) is proposed. In DCNCC, the relay dynamically adapts forming the network-coded data based on the observed instantaneous source-to-relay channel quality, and then forwards the network-coded data towards corresponding destinations. Under the assumption (denoted as A) that each destination can reliably overhear the data from other sources, the diversity-multiplexing tradeoff of DC-NCC is proved to outperform that of conventional cooperation (CC), This verifies that DC-NCC outperforms CC in bandwidth efficiency. Moreover, DC-NCC offers reduced system outage probability and single-pair outage probability compared with CC, and achieves the same full diversity order as CC at high signal-to-noise ratio (SNR). Numerical results also show that with dynamic coding, DC-NCC avoids unnecessary error propagation which can be caused by coding those erroneous data into network-coded data. Finally the performan...

• Type: Conference
• Year: 2007
• Where: INFOCOM
• Authors: Cong Peng, Qian Zhang, Ming Zhao 0001, Yan Yao
• Keywords: Communications, Dynamic Coding, INFOCOM 2007, Network-coded Data, Outage Probability