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Availability Analysis of Different PON Models

Radoš K., Radoš I.

Journal of Telecommunications and Information Technology

2017

nr 4

47--53

Due to the increasing demands of individual users, Passive Optical Networks (PON) are a promising technology for future broadband access networks. Reliable access to network services is a very important feature, so the availability of the connection is becoming one of the most important requirements. Failure of the optical ﬁber occurring between the Optical Line Terminal (OLT) and the passive optical splitter can cause the services becoming unavailable for a large number of users, so it is necessary to prevent such an occurrence by providing backup resources – in this case a spare optical ﬁber. When constructing the spare path (protection ﬁber), it is important to keep in mind that, if possible, the working and the spare ﬁber should not be positioned within the same cable. Failure of the optical ﬁber between the passive splitter and the individual user also means a loss of service for that user. In that case, protection may be offered by adding spare ﬁbers. The question is, however, whether such a solution is cost-effective, as it would lead to a signiﬁcant cost increase in the construction of the access network. This paper presents the availability analysis conducted for different PON models.