Design And Implementation Of An Efficient Networkcoding Technology On Smartphones

With the development of mobile network technology and the popularization of smart terminals,the requirement of transmitting large-scale data such as broadcasting video in wireless network has become an important part of people's daily life.In addition to using mobile networks consumes a lot of traffic resources,the instability of the wireless network seriously affects people's service experience.Especially in the broadcast and multi-transmission mode,the unstable network environment or the receivers' degraded performance which is caused by the quality of data transmission leads to a large number of retransmissions.These retransmissions not only cause a waste of valuable traffic resources,but also consume considerable time of data processing and transmission.In order to solve this problem,this paper proposes and designs a network coding transmission module based on the Android platform.By linearly combining the data to be retransmitted and introducing a certain number of redundant coding packets,the times of retransmission and the total amount of data that needs to be transmitted can be reduced as much as possible,which achieves the saving of both traffic and time.The module has the following features:minimization of the introduction of redundant data of encoding;adding redundant packets to avoid retransmission;support of a variety of transmission strategy options;support of multiple data transfer modes,such as UDP broadcast and MPTCP.The above features are the main differences between this paper and the existing work,and they are the innovative points in this article.The practical test shows that compared with ordinary retransmission,the proposed network coding transmission module can significantly reduce the times of data retransmission and the amount of data for transmission.Compared with random linear network coding,the module significantly reduces the amount of redundant data that needs to be transmitted.Therefore,this module improves the experience of users' data transmission to some extent in multiplex transmission mode.