Design And Performance Analysis Of A New Wireless Data Center Comb Topology

In recent years,group communication has become more and more popular.In the current data center network,multicast plays an extremely important role in group communication.Traditional data center network is designed based on wires.Researchers have proposed Dcell,Bcube and other data center topologies successively.However,in the traditional data center network,the wired topology structure has the disadvantages of high overhead,complex deployment,high maintenance cost,slow heat dissipation and so on.With the continuous development of 60 GHz millimeter wave wireless technology,it has been recognized by more and more countries.Aiming at the low connectivity and poor scalability of the existing wireless data center Flyways structure and Graphite structure,this paper proposes and designs a new data center network topology Comb structure(Comb model is a multi-layer cellular structure model,which is a multi-layer structure composed of single-layer honeycomb-like structure interlaced with each other).The structure can effectively improve the connectivity of the data center,shorten the routing path,reduce the probability of node failure in the network,and ensure the smooth network.This paper mainly completes the following work:(1)In view of some problems in the low connectivity and difficult expansion of existing wireless data centers Flyways and Graphite structures.Combined with the characteristics of 60 GHz millimeter wave wireless communication technology,a new type of wireless data center network topology Comb structure is proposed.At the same time,the construction process and algorithm of Comb topology structure are given.The structure effectively solves the problems of Flyways structure and Graphite structure expansion,deployment and maintenance.(2)Proposing a multicast routing algorithm suitable for Comb structure,referred to as CMR algorithm.After merging and summarizing,it is found that when data transmission is performed in the Comb structure,two situations are encountered: intersection and separation.In view of these two situations in the process of data transmission,the CMR algorithm has a targeted algorithm design.The time complexity of CMR algorithm is also analyzed.(3)Theoretical analysis and experimental verification of Comb structure performance show that the Comb topology has better performance than the existing Flyways structure and Graphite structure.The throughput and delay of different scale network topologies are simulated under CMR algorithm.The experimental results show that the CMR algorithm can reasonably balance the communication load and effectively distribute the network for communication.