Terminal node self-protection scheme by using unidirectional splitter-based ring

In special networks, such as military or finance networks, terminal nodes deserve more attentions because of higher demands on reliability and survivability than switching nodes. A three nodes non-break-self-protection unidirectional splitter-based ring is introduced and designed to protect the terminal nodes. The performances are compared with the traditional (existing) 1+2 protection scheme in terms of the cost, connection availability, recovery time and optical power budget. Calculation results show this proposed scheme can keep data integrity and has very high survivability and connection availability, while the cost, recovery time and power budget are acceptable. Copyright © 2010 John Wiley & Sons, Ltd.