Abstract: In some scenarios of opportunistic networks, a part of nodes have high priority to use network resources. Under Epidemic mechanism, a routing algorithm based on priority strategic is proposed, which is implemented on ONE simulation platform. In the algorithm, nodes are assigned different priorities, and by well-defined strategies low priority nodes are restricted to use network resources, which ensure that high priority nodes can use network resources. Simulation results show that the algorithm can effectively restrict the Epidemic over flooding with respect to appropriate time factor. The performance of high priority nodes is significantly increased without affecting the overall performance of the network.

Key words: opportunistic network, routing scheme, Epidemic, priority, time factor

摘要： 在机会网络某些应用场景中，部分节点有优先使用网络资源的需求。提出并在ONE仿真平台上实现了Epidemic机制下基于优先级策略的路由算法。该算法为网络中节点分配了不同的优先级，并通过一定的策略抑制低优先级节点使用网络资源，以此来保证高优先级节点优先使用网络资源。仿真结果表明，当选择恰当的时间因子时，该算法可有效地抑制Epidemic过度泛洪，在不影响网络总体性能的前提下大幅度提高优先级节点的性能。

关键词: 机会网络, 路由算法, Epidemic, 优先级, 时间因子