Dissertation > Industrial Technology > Radio electronics, telecommunications technology > Communicate > Communication network > General issues > Communication network structure and design

Research on Optimization and Blocking Probability in Three Stage Clos Network

Author Yu
Tutor GuNaiJie
School University of Science and Technology of China
Course Computer System Architecture
Keywords Three-stage Clos network Multicast Strictly non-blocking Replacement Optimization Blocking probability Hardware cost Crosspoint WDM optical networks
CLC TN915.02
Type PhD thesis
Year 2009
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The three-stage Clos network is the use of the basic switching unit to build a large switched networks , the most commonly used topology . The three-stage Clos network replacement, one to many broadcast , strictly implemented in a variety of communication methods for multi - source multicast generalized and rearrangeable nonblocking broadcast , can well meet the large-scale switching network design requirements . Therefore, the study of the optimization design of the three-stage Clos network blocking probability analysis in theory and in fact has a very important significance . Papers around the three-stage Clos network hardware cost reduction and unified blocking probability analysis model , carry out the following work : for strictly non-blocking multicast three-stage Clos network hardware cost , proposed on optimized way . The method of differentiating the total hardware cost of the network , network hardware cost makes network hardware cost minimum to meet the conditions and optimized . By analysis and comparison , strictly non-blocking multicast three-stage Clos network optimization , can effectively reduce the hardware cost of the network . Just a single probability analysis model for the three-stage Clos network existing unicast or multicast model , Hwang unified approach and Pattavina blocking probability analysis model combined approach , establish a unified probabilistic analysis model . Found by analysis with existing conclusions , and propose a unified analysis model is more accurate and comprehensive description of the multicast three-stage Clos network blocking performance . Compromise blocking probability and hardware cost , to build the structure of the three-stage Clos network has a small obstruction, low cost replacement . After the analysis and comparison can be found in nearly half , to build the network of hardware cost is lower than the corresponding strictly non-blocking network blocking probability is very small . Proposed a model based on the three-stage Clos network WDM optical network hardware cost optimization . Under the restrictions , combined with the third chapter has been optimized for general three-stage Clos network approach has been optimized WDM optical network based on the model of the three-stage Clos network . By comparing and analyzing optimization method can effectively reduce the WDM fiber-optic network based on the model of the three-stage Clos network hardware cost .

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