移动自组网络高可用性服务的研究

Research on Highly Available Services in Ad Hoc Networks

AdHoc网络具有组网速度快、抗毁自愈能力强等优点,在军事和民用领域得到越来越广泛的应用.网络重构自恢复技术对于保证网络的可靠性、抗毁性与健壮性起着十分重要的作用.我们对AdHoc网络的重构自恢复进行研究,提出了"服务器组管理算法".该算法采取主动冗余技术,通过增加、替换或删除服务器对服务器组进行维护和管理,以保证状态连续并减少服务中断,确保在提供服务的某些节点失效后整个系统仍然能够正常工作.仿真实验和数据分析表明,该算法提高了AdHoc网络的可用性,保证了网络的可靠性、抗毁性与健壮性.

Ad-hoc networks are used more and more widely in military and civilian applications due to the rapid organizing of networks and the outstanding ability of destruction-resistance and self-recovery. Technology of re-construction and self-recovery is very important for the availability, destruction-resistance and robustness of a network. Based researching reconstruction and self-recovery for the Ad Hoc network, The server group management algorithm is proposed. This algorithm uses active replication policy to guarantee the consistency of the status of servers and maintains the server group by adding, replacing and deleting servers to reduce service interruptions. It guarantees that certain service is still available while some nodes that supply such service failed. The results of simulation and data analysis show that the algorithm improves availability and guarantees reliability, destruction-resistance and robustness of the Ad Hoc network.