Abstract:

Delay Tolerant Networks is an emerging research field. In this kind of networks,the

connections between nodes are frequently interrupted,and it is difficult to predict them. At

present,a common strategy is to use multiplecopy routing for message delivery.

However,considering the characteristic that the majority of nodes’ energy supplies are

limited,a large number of additional copies transmission will make some nodes’ energy

consumption larger,making the nodes stop working faster,eventually leading to the rapid

decline of the routing performances. With different energy supplies on each node in the

networks,a hybrid spray and wait routing algorithm,which is ameliorated by the spray and

wait routing algorithm,is put forward in this paper . The simulation indicates that this

routing algorithm has better performances on the delivery probability and the average delay

by increasing the cost of energy consumption differently at every node.

Key words: DTN;spray and wait;routing algorithm;corenode；energy