In vehicular Ad Hoc networks

when vehicles are moving randomly

aiming at problem that efficiency of data transmission is low

propose an opportunistic routing algorithm based on time delay expection to against the situation when both the source node and the destination node are moving. Our opportunistic routing algorithm combines the theory of probability and statistics knowledge

to get the time delay expection parameters

the opportunistic routing algorithm incorporates the trajectory prediction of the destination node timeliness requirements of data packet. When the delay expection parameters are regarded as the selection standard of data packet’s next relay node

can ensure that the data packet can be forwarded from the moving source node to the moving destination node timely and effectively.