Computing the K-Terminal Reliability for SONET Self-Healing Rings

Synchronous Optical Network (SONET) technology has made highspeed self-healing ring (SHR) architectures practical and economical for the uses inmany local exchange carriers' intra local access transport area telecommunicationnetworks. This paper analyses the K-terminal reliability, i.e., the probability that asubset of k specific terminal stations of an SONET SHR can communicate, for fourtypes of SONET SHRs and derives their K-terminal reliability expressions.