Abstract: In traditional wireless sensor networks, users, sinks and sensor nodes are assumed static. However, moblility in a wireless sensor networks presents interesting challenges and requires special attentions. We first analyzed the challenges posed by mobility in wireless sensor networks. Then, existing proposals that support mobility in wireless sensor networks were summarized. And we pointed out the advantages and shortcomings of the existing proposals. Finally we concluded this paper with brief comments on promising future of wireless sensor networks.

Key words: Wireless sensor networks, Mobility, Research progress