TY - GEN
T1 - Analysis and applications of r-for-N protection system
AU - Lu, Kevin W.
AU - Liew, Soung C.
PY - 1990
Y1 - 1990
N2 - The availability of a single member of a group of N functionally identical systems that work in parallel and share a pool of r backup systems is analyzed. These N + r systems, each with failure rate λ, are repairable, and there are m repairers available, each operating at rate μ. A Markov model is used to derive formulas for availability, mean time to failure, and mean time to repair for such a system. The analysis results indicate that by increasing r and decreasing ρ, the ratio of failure rate to repair rate, overall network availability is improved. It is shown that, for certain ρ's, some r:N pooled protections can significantly outperform 1:1 or 1:2 dedicated protection in terms of availability. The application of r:N protection to high-capacity transport systems is discussed, and it is indicated that multiwavelength systems may use additional wavelengths for protection. It is concluded that r:N protection can potentially provide both improved availability and significant cost advantages to the high-capacity transport systems.
AB - The availability of a single member of a group of N functionally identical systems that work in parallel and share a pool of r backup systems is analyzed. These N + r systems, each with failure rate λ, are repairable, and there are m repairers available, each operating at rate μ. A Markov model is used to derive formulas for availability, mean time to failure, and mean time to repair for such a system. The analysis results indicate that by increasing r and decreasing ρ, the ratio of failure rate to repair rate, overall network availability is improved. It is shown that, for certain ρ's, some r:N pooled protections can significantly outperform 1:1 or 1:2 dedicated protection in terms of availability. The application of r:N protection to high-capacity transport systems is discussed, and it is indicated that multiwavelength systems may use additional wavelengths for protection. It is concluded that r:N protection can potentially provide both improved availability and significant cost advantages to the high-capacity transport systems.
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M3 - Conference contribution
AN - SCOPUS:0025540106
SN - 0879426322
T3 - IEEE Global Telecommunications Conference and Exhibition
SP - 678
EP - 682
BT - GLOBECOM '90
T2 - IEEE Global Telecommunications Conference & Exhibition Part 3 (of 3)
Y2 - 2 December 1990 through 5 December 1990
ER -