A simple, intact, SHRSHR with one damaged linkSHR with two damaged links, splitting it into two unconnected, but functional sub-rings
Descriptionedit
The system consists of a ring of bidirectional links between a set of stations, typically using optical fiber communications. In normal use, traffic is dispatched in the direction of the shortest path towards its destination. In the event of the loss of a link, or of an entire station, the two nearest surviving stations "loop back" their ends of the ring. In this way, traffic can still travel to all surviving parts of the ring, even if it has to travel "the long way round".
A second break in the ring may divide it into two sub-rings, but in such a case each sub-ring will remain functional.
Advantagesedit
Self-healing rings offer high levels of resilience at low cost, since it is often geographically easy to take multiple paths across the landscape and link them up into a ring with very little extra fiber length.
Recent submarine communications cables are typically built in pairs to function as a self-healing ring. Very high resilience systems are typically built on interconnected meshes of self-healing rings.
Another example of a self-healing ring network technology is the FDDI local-area network. Resilient Packet Ring is a new technology for packet-switched self-healing ring networks.
self, healing, ring, this, article, does, cite, sources, please, help, improve, this, article, adding, citations, reliable, sources, unsourced, material, challenged, removed, find, sources, news, newspapers, books, scholar, jstor, december, 2009, learn, when, . This article does not cite any sources Please help improve this article by adding citations to reliable sources Unsourced material may be challenged and removed Find sources Self healing ring news newspapers books scholar JSTOR December 2009 Learn how and when to remove this template message A self healing ring or SHR is a telecommunications term for loop network topology a common configuration in telecommunications transmission systems Like roadway and water distribution systems a loop or ring is used to provide redundancy SDH SONET and WDM systems are often configured in self healing rings A simple intact SHRSHR with one damaged linkSHR with two damaged links splitting it into two unconnected but functional sub ringsDescription editThe system consists of a ring of bidirectional links between a set of stations typically using optical fiber communications In normal use traffic is dispatched in the direction of the shortest path towards its destination In the event of the loss of a link or of an entire station the two nearest surviving stations loop back their ends of the ring In this way traffic can still travel to all surviving parts of the ring even if it has to travel the long way round A second break in the ring may divide it into two sub rings but in such a case each sub ring will remain functional Advantages editSelf healing rings offer high levels of resilience at low cost since it is often geographically easy to take multiple paths across the landscape and link them up into a ring with very little extra fiber length Recent submarine communications cables are typically built in pairs to function as a self healing ring Very high resilience systems are typically built on interconnected meshes of self healing rings Another example of a self healing ring network technology is the FDDI local area network Resilient Packet Ring is a new technology for packet switched self healing ring networks See also editRedundancy engineering nbsp This article related to telecommunications is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Self healing ring amp oldid 1181201553, wikipedia, wiki, book, books, library,
