Routing And Resource Allocation In Multi-granularity Switching System Based On PCE

With the growing demand for business communications,electrical signal processing optical path switching can't meet the demand.In the traditional network,each node is responsible for calculating the path;synchronize the whole network state,which will increase the burden on the network?And the wavelength is the most basic routing granularity,resulting in relatively low wavelength utilization.Due to the limitation of wavelength continuity,the routing design of wave band technology is becoming more and more complex,which has a direct impact on the utilization of the system.In order to solve the above problems,a multi-granularity switching system based on path computing element(PCE)is proposed,and the related research is carried out.The specific contents are as follows:First,in view of the low efficiency of existing switching systems,a multi-granularity switching system based on PCE technology is proposed.PCE is responsible for routing and allocation of resources in the network.It not only simplifies the network structure,but also reduces the node load.It improves the scalability and survivability of the optical network.It is helpful to realize the development of the optical network to the intelligent direction.Secondly,the optical code has the advantages of large capacity and more flexible.The optical code granularity is introduced into the multi granularity switching system.In combination with PCE technology,a more reasonable routing algorithm and resource allocation strategy are proposed.Then a code group routing element(CGRE)technique for binding optical address codes is proposed.In order to reduce the consumption of port resources and improve the utilization of optical fiber,the optical code is bundled and the code group routing element is set up to switch the information.Finally,the algorithm strategy proposed in this paper is deeply studied and analyzed.The performance of the whole system is analyzed,including the packet loss rate,the blocking rate and the system throughput.Thus,the advantages of the multi-granularity switching system based on PCE are proved.