基于网络编码的手机用户群文件共享和同步

为了快速、准确的实现一跳范围内手机用户群的文件共享,以达到手机用户之间进行协同工作的目的,在Android操作平台上设计、实施了本系统。在系统中提出了基于网络编码的可靠广播算法来保证文件传输的可靠性和快速性,并通过基于机会编码的全网同步算法来实现任一时刻手机群中各节点文件同步。通过真实实验验证了系统中文件共享的时延并不会随着手机群中节点数目的增加而增加,文件同步时网络中数据量大幅度下降,因此相比并发共享等其它方法,系统提供了一种快速、可靠的手机群文件共享和同步方法。

File Sharing and Synchronization of Mobile Phone User Group Based on Network Coding

In order to quickly and accurately realize file sharing among mobile phone users in one-hop range and achieve the purpose of cooperative work among mobile phone users,this paper designs and implements the system on the Android operating platform.In this system,we propose a reliable broadcast algorithm based on network coding(ARQ-NCRB)to ensure the reliability and rapidity of file transmission,and realize the file synchronization of each node in the mobile phone user group at any time through an all-network synchronization algorithm based on opportun-istic coding(OCFNS).Through real experiments,it is verified that the delay of file sharing in this system will not in-crease with the increase of the number of nodes in the mobile phone group,and the amount of data in the network will greatly decrease during file synchronization.Therefore,this system provides a fast and reliable method of file sharing and synchronization in the mobile phone user group compared with other methods such as concurrent sharing.