Wdm Network Design Method Of Dynamic Changes In The Volume Of Business Case Studies

There is an important problem for the WDM network which is the traffic on the WDM network is dynamically variable, as a result, if the traffic on the virtual topology has changed, the performence of the network such as average number of weighted hops, the throughput of the network, the congestion of the network will decline, obviously, this is not acceptable for both the network administrators and network clients.In this thesis, the research of the plan of the WDM network under dynamically variable traffic can be classified into two main directions. The beginning point of the first research direction is that we design a type of load-balancing virtual topology which is insensitive to the traffic, such plan method has been proposed whose name is VLBS(Valiant Load-Balancing Schemem), the disadvantage of VLBS is that it can only be applied to the homogeneous network in which each node has the same capacity, in Chapter2, a more general Valiant Load-Balancing Scheme(GVLBS) has been proposed, the advantage of the GVLBS is that it can be used both on the homogeneous network and heterogeous network, in this chapter, we will give the detail derivation process and numerical analysis.The beginning point of the second research direction is that we first design a virtual topology for the physical topology under a specific traffic matrix, for a while, the traffic has changed, the network performence will decline. Under such condition, in Chpater 3, a virtual topology reconfiguration algorithm is studied which can decrease the average weighted hops. It uses the new traffic matrix, current virtual topology situation and physical topology situation as input, compute a new virtual topology as output under the constraint which is the number of the different lightpahts between the old and new virtual topologies is not larger than the parameter NRange. In this Chapter, I have implemented the algorithm by myself and a thoughfull study of two key procedures has been studied and the result of the algorithm simulation has been analyzed.We can get a new virtual topology by the virtual topology reconfiguration...