{"id":346622,"date":"2017-01-04T14:40:05","date_gmt":"2017-01-04T22:40:05","guid":{"rendered":"https:\/\/new-cm-edgedigital.pages.dev\/en-us\/research\/?post_type=msr-research-item&p=346622"},"modified":"2018-10-16T19:56:32","modified_gmt":"2018-10-17T02:56:32","slug":"routing-grooming-two-tier-survivable-optical-mesh-networks","status":"publish","type":"msr-research-item","link":"https:\/\/new-cm-edgedigital.pages.dev\/en-us\/research\/publication\/routing-grooming-two-tier-survivable-optical-mesh-networks\/","title":{"rendered":"Routing and Grooming in Two-Tier Survivable Optical Mesh Networks"},"content":{"rendered":"
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While deploying the next generation of optical networks with a mesh topology, telecommunications carriers are being confronted with a choice between wavelength switches that can switch traffic at SONET STS-48 (2.5 Gbps) granularity and sub-wavelength grooming capable switches that can switch at STS-1 (51 Mbps) granularity. The former cannot switch circuits of capacity lower than STS-48 without the help of external grooming devices, and consumes high fragmented\/unused capacity to support low capacity end to end circuits using high capacity STS-48 channels. The latter almost eliminates such capacity wastage by supporting STS-1 level switching, but involves larger switching delays leading to slower restoration and requires more complicated hardware design that decreases switch scalability with increasing port count.<\/p>\n

This paper proposes an intelligent packing and routing algorithm in a network architecture which contains both kinds of switches configured in two tiers, and compares it with the other two network architectures – one with only wavelength switches with STS-48 granularity, and another with only grooming switches with STS-1 switching granularity. It is shown that the two-tier architecture with our routing scheme is comparable in capacity efficiency to the STS-1 only network, while its scalability and restoration delays are at par with the STS-48 only network.<\/p>\n

Furthermore, we propose a partial two-tier network architecture where the functionality of STS-1 grooming is deployed at a subset of the network nodes. Our simulations show that the capacity efficiency of this architecture does not decrease significantly with reduction in the number of STS-1 switch equipped nodes.<\/p>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

While deploying the next generation of optical networks with a mesh topology, telecommunications carriers are being confronted with a choice between wavelength switches that can switch traffic at SONET STS-48 (2.5 Gbps) granularity and sub-wavelength grooming capable switches that can switch at STS-1 (51 Mbps) granularity. The former cannot switch circuits of capacity lower than […]<\/p>\n","protected":false},"featured_media":0,"template":"","meta":{"msr-url-field":"","msr-podcast-episode":"","msrModifiedDate":"","msrModifiedDateEnabled":false,"ep_exclude_from_search":false,"_classifai_error":"","msr-author-ordering":null,"msr_publishername":"","msr_publisher_other":"","msr_booktitle":"","msr_chapter":"","msr_edition":"11th International Workshop on Quality of Service (IWQoS), Monterey (USA)","msr_editors":"","msr_how_published":"","msr_isbn":"3-540-40281-0","msr_issue":"","msr_journal":"","msr_number":"","msr_organization":"","msr_pages_string":"231-248","msr_page_range_start":"231","msr_page_range_end":"248","msr_series":"","msr_volume":"","msr_copyright":"","msr_conference_name":"11th International Workshop on Quality of Service (IWQoS), Monterey 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