With regard to long transmission delay and dynamic topology characters in satellite network

a novel routing algorithm was proposed in multi-protocol label switching satellite network.The algorithm uses the prior knowledge of source-destination pairs

and link propagation delay is also considered.Based on time-varying topology snapshot of satellite network

initial link weight is defined as function of transmission delay and residual bandwidth.Both current request and future requests are in account when calculate critical degree.Thus traffic engineering is realized by link weight dynamic adjustment and critical links extension loaded

which guarantee resource utilized better.Simulation results demonstrate the algorithm performs better in terms of request reject ratio

total available flow

average hop and transmission delay of least interference paths.