Journal of Beijing University of Posts and Telecommunications

  • EI核心期刊

JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM ›› 2007, Vol. 30 ›› Issue (6): 99-102.doi: 10.13190/jbupt.200706.99.dengy

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A p-Cycle Algorithm for Mesh Networks with Directional Capacity

DENG Yu, ZHANG Pei, LI Bin, GU Wan-yi   

  1. (Key Laboratory of Optical Communication and Lightwave Technologies, Ministry of Education, Beijing University of Posts and Telecommunications, Beijing 100876, China )
  • Received:2007-01-01 Revised:2007-06-12 Online:2007-12-31 Published:2007-12-31
  • Contact: DENG Yu

Abstract:

A new pre-configure cycle (p-cycle) algorithm named unidirectional p-cycle is proposed when considering the single span failure in mesh networks with directional capacity. Unidirectional p-cycle includes clockwise and counterclockwise p-cycle by adding direction to traditional p-cycle. The new evaluation criteria and approach for determining and configuring candidate p-cycles according to the proposed algorithm are presented. Extensive simulations show that the proposed unidirectional p-cycle outperforms conventional p-cycle algorithms in mesh networks with directional capacity in terms of protection success ratio, protecting capacity proportion and protecting capacity utilization.

Key words: mesh networks with directional capacity, wavelength division multiplexing, recovery, unidirectional p-cycle, asymmetry degree

CLC Number: