Abstract: Wireless sensor networks arc a kind of integrated intelligent information system consisting of small nodes with information collection, information transformation, and information processing. It can be used in many fields, and is a new domain of information networks. Limitation of the power energy, dissemination of extensive sensor nodes, and dynamics of the topology of wireless sensor networks have brought out enormous challenges to routing in wireless sensor networks. In the paper, firstly restrict factors were analyzed.some challenges of routing in wireless sensor networks were presented, and then various Finally, some development trends were be a proper selection to solve the routing problem in wireless sensor pointed out, and the dynamic topology model may networks.

Key words: Wireless sensor networks,Routing optimization,Dynamic topology modelling,Restrict factors,Complex networks