吉林大学学报(工学版)

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Complete dynamic algorithm for updating shortest path tree

Sun Zhi-xin1, Gao Yan-juan1,Wang Wen-ding2   

  1. 1.School of Computer Science and Technology, Nanjing University of Posts and Telecommunications, Nanjing 210003, China; 2. School of Communication, Nanjing University of Posts and Telecommunications, Nanjing 210003, China
  • Received:2006-07-14 Revised:2006-09-23 Online:2007-07-01 Published:2007-07-01
  • Contact: Sun Zhi-xin

Abstract: A new complete dynamic algorithm for updating shortest path (CD-SPT) tree was proposed by combining the existing algorithm for updating shortest path tree (SPT) and the solution for SPT when a node is added or deleted. When the network topology changes, the increase or decrease of edge-weight and the addition or deletion of nodes can be processed by the CD-SPT algorithm respectively. This algorithm pays attention only to the changes of nodes and edges by taking fully use of the useful information provided by the existing SPT. Computation of the redundancy can be reduced by minimizing the computation scope, thus the total computation can be significantly reduced. Simulation experiment verifies the good performance and high efficiency of the CDSPT algorithm.

Key words: computer systems organization, routing protocol, SPF algorithm, shortest path tree, dynamic update

CLC Number: 

  • TP393
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