The end to end transmission performance is very poor because of routing failure caused by node movement in MANET.To solve this problem

an algorithm for the link duration probability of epoch-based movement was proposed

and based on which a link duration probability based cross-layer routing protocol for epoch-based movement（LPCP） was proposed.LPCP cross-layer interacts with transport layer

and considered both the maximum path availability and the minimum hops of an end to end connection.Three complementary mechanisms:routing switch

save then forward

ack reconfirm were proposed to prevent routing failure and the transmission efficiency reduction.It is shown by computer simulation that LPCP results in a significant improvement of the packet loss caused by routing failure

and increase the throughput much more.