Implementation of Self-healing Function in ATM Networks [Vol. 3, No. 3, 1995]

Implementation of Self-healing Function in ATM Networks

Rryutaro Kawamura
NTT Optical Network Systems Laboratories
1-2356 Take, Yokosuka-shi, Kanagawa, 238-03 Japan
Email: ryutaro_AT_exa.onlab.ntt.jp

Hisaya Hadama
NTT Optical Network Systems Laboratories
1-2356 Take, Yokosuka-shi, Kanagawa, 238-03 Japan
Email: hadama_AT_exa.onlab.ntt.jp

Ikuo Tokizawa
NTT Optical Network Systems Laboratories
1-2356 Take, Yokosuka-shi, Kanagawa, 238-03 Japan
Email: tokizawa_AT_exa.onlab.ntt.jp

Abstract
This paper proposes an implementation scheme for the self-healing function in ATM (Asynchronous Transfer Mode) networks and assesses its performance in a developed experimental system. First, our proposed ATM self-healing scheme is described. This scheme realizes more rapid restoration of failed Virtual Paths than other self-healing algorithms, supports the node failure case, and minimizes the spare resources required. Next, an implementation scheme is proposed. We propose that the self-healing function be implemented as a software process, and that OAM (Operation Administration and Maintenance) cells be utilized for fast message transmission. Next, results of a prototype system that we implemented on an ATM cross-connect system are discussed. The fundamental characteristics of restoration performance are measured using the experimental system. Based on these results, restoration characteristics of real world scale networks are estimated by computer simulations. The simulation results indicate that any-one link failure is completely restored within 2 seconds.

JNSM: Vol. 3, No. 3, 1995 Implementation of Self-healing Function in ATM Networks [Vol. 3, No. 3, 1995]

NOTE: only abstract of paper available on-line

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