An Estimating Method for Nodes Meeting Time under Social Ubiquitous Network

Recently the disconnected Delay-Tolerant Network (DTN) draws more and more attention.It is different from the traditional Ad-hoc and MANET. In DTN the disconnected nature and lack of end to end connectivity between nodes mean that the nodes communicate by the way of store-carry-forward. Therefore, it was rencently been recognized that mobility can be turn into a useful ally, by making nodes carry data around the network instead of transmitting them. Then we first research the expected meeting time in random mobility model, then derive the expected meeting time of nodes in the community movement model. Finally we evaluate the approach of deriving the meeting time using simulator.