Abstract
Shared restoration is key to realizing the bandwidth savings offered by mesh
networking. To be viable, restoration has to be effected very quickly—typically,
within 50 ms after failure. However, all the known schemes involve signaling and
cross-connect setups and require excessive duration times. We describe a novel
restoration scheme called FASTeR that dramatically reduces restoration times by
eliminating these operations. It involves a novel select-multicast feature of the
cross connects and can be applied to all-optical or electrical networks. We extend
the generalized multiprotocol label-switching (GMPLS) standard to support this
scheme and present simulation results to evaluate the scheme and show that a small
multicasting degree is sufficient in practice to achieve the bandwidth savings
gained in traditional restoration schemes.
© 2003 Optical Society of America
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