Abstract: Because there is not a complete communication route between source node and destination node, so opportunistic network is supposed to solve it in the form of store-carry-transmit, which make use of the chance bring by the mobile nodes. Although opportunistic network has high communication delay, it has been used in some environment which can’t build a complete network route, for example network of handheld device, vehicular delay tolerant network. But in opportunistic network research, it is hard or impossible to build a real scene, so that researcher use simulation experiment to represent the real world. And the mobility model which to simulate the way of move pattern is the foundation of simulation. Particular, in opportunistic network of handheld device, the realistic extent of mobility model can heavily affect the further research, so someone propose some effective mobility model base on social complex networks theory. In this paper, based on recent literature, we propose a community tier based mobility model (CTMM), which analyse the same and the difference between the nodes form angel of community tier, and realize the otherness of node in item of choosing the mobile way and goal. The results indicate that the node in ACTIVE have a higher meet cumulative number of nodes than the node in STEADY, which result from node in AVEIVE always move between different community. In term of accurately of real world, CTMM can be used in opportunistic network of handheld device.

Key words: opportunistic network, community, mobility model