1.School of Information and Communication Engineering， Hubei University of Economics， Wuhan 430205， China；2.School of Computer and Information Engineering， Hubei University， Wuhan 430062， China
Abstract：Network coding(NC) is a combination technology of two or more data packets， which can improve the data transmission rate of the wireless network. Quadratic permutation polynomials (QPP) provide good coding performance， and also support a particular specific conflict-free parallel access. In this paper， we propose a Sliding Window-based Quadratic Permutation Polynomial Network Coding algorithm in wireless networks (QPPSW-NC). QPPSW-NC enables to control the decoding complexity of each sliding-window independently from the packets received and recover the original data. QPPSW-NC was analyzed using NS2 ， and evaluated in terms of the network throughput， encoding overhead， decoding delay， energy consumption， and energy efficiency when data packet is transmitted. The simulations result shows that the QPPSW-NC algorithm with our proposition can significantly improve the network throughput and achieves higher diversity order.
2021, Vol. 55 
