Deterministic Half-Cycle Transmission Cooperative Network Coding for Wireless Sensor Network over Erasure Channels
Hani H. Attar |Pages: 236-248|

Abstract— Network coding (NC) and a cooperative network are two well-matched technologies; accordingly, the Cooperative NC (CoNC) is defined as the aggregation of data from different users in such a way that users help each other to transmit and receive their data. Researchers applied CoNC over a cluster of Wireless Sensor Network (WSN) at the first stage (two half-cycle stages), and then extended it to the second stage when needed over erasure channels. The required protocol for this network is proposed. Extra half-cycle can be transmitted if full connectivity is not obtained in the first two half-cycle stages, taking into consideration that two extra half-cycle protocols are proposed in this paper. The proposed protocol provides the ability for the network to lose one packet between each couple of users in the second half-cycle 10% of the transmitted packets in the first stage results in decreasing the Automatic Repeat Request (ARQ) significantly in the first stage. Moreover, the protocol saves 50% of the number of the transmitted packets in next stage(s) if needed. A mathematical model is constructed using full reception matrix which is well calculated. It demonstrates improvement of the full decoding and the simplicity of solving the Jordan Gaussian Elimination matrix due to using the proposed deterministic combination protocols. The results confirm that the idea of half-cycle transmission is applicable. This leads to the preservation of the number of re-transmitted packets, and better Packet Error Ratio (PER) which allows obtaining better bandwidth and less transmission traffic.