基于GMPLS的新型流量工程算法研究

he key algorithm of the traditional traffic engineering is Shortest Path First, transferring data on the shortest path in a network. It stands a good chance to cause traffic jam when lots of data are needed to be transferred, due to the limit of the bandwidth of the single path, which explains why data often concentrated on paths with lower costs rather than those with higher costs. TDBB（Traffic Distribution Based on Bandwidth）, a totally new traffic engineering algorithm, is proposed in this paper. In TDBB algorithm, traffic is not transferred only on one single path, but is divided into several parts in a proportion and transferred on multipath, which is different from the traditional traffic engineering algorithm. The traffic proportion related to each path is decided by the weight of each path’s bandwidth, while the bandwidth of each path is decided by the minimum bandwidth on this path. Compared with the traditional traffic engineering algorithm, TDBB could not only use the network resources to the best and improve the transmission efficiency, but also facilitate the traffic flow balance, which means that traffic jam would not happen, unless the whole resources of the network fail to afford the demand.