{"id":3595,"date":"2017-04-03T12:01:51","date_gmt":"2017-04-03T06:31:51","guid":{"rendered":"https:\/\/www.wikitechy.com\/technology\/?p=3595"},"modified":"2017-04-03T12:01:51","modified_gmt":"2017-04-03T06:31:51","slug":"optical-busrt-switched-networks","status":"publish","type":"post","link":"https:\/\/www.wikitechy.com\/technology\/optical-busrt-switched-networks\/","title":{"rendered":"Optical Busrt Switched Networks"},"content":{"rendered":"

Optical Burst Switching (OBS)<\/strong><\/span><\/h3>\n

Definition<\/b><\/span><\/h4>\n
    \n
  • Optical Burst Switching (OBS) is an optical network technology that aims to improve the use of optical networks resources when compared to optical circuit switching (OCS).<\/li>\n
  • OBS is implemented using Wavelength Division Multiplexing (WDM), a data transmission technology that transmits data in an optical fibre by establishing several channels, each channel corresponding to a specific light wavelength.<\/li>\n
  • Optical Burst Switching is used in core networks, and viewed as a feasible compromise between the existing Optical Circuit Switching (OCS) and the yet not viable Optical Packet Switching (OPS).<\/li>\n<\/ul>\n[ad type=”banner”]\n

    OBS network<\/strong><\/span><\/h4>\n
      \n
    • Control and data information travel separately on different channels<\/li>\n
    • Data coming from legacy networks are aggregated into a burst unit in edge node<\/li>\n
    • The control packet is sent first in order to reserve the resources in intermediate nodes<\/li>\n
    • The burst follows the control packet with some offset time, and it crosses the nodes remaining in the optical domain<\/li>\n<\/ul>\n

      OBS principles<\/strong><\/span><\/h4>\n
        \n
      • Variable-length packets, named bursts<\/li>\n
      • Asynchronous node operation<\/li>\n
      • A strong separation between the control and data planes\n
          \n
        • control burst (with control information)transmitted on dedicated control channel andprocessed electronically<\/li>\n
        • Data burst transmitted and switched all-optical way<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n

           <\/p>\n[ad type=”banner”]\n

          Edge Node<\/strong><\/span><\/h4>\n

          Consist of electronic router and OBS interface<\/p>\n

          Functions<\/b><\/p>\n

            \n
          • \u00a0Electronic data buffering and processing<\/li>\n
          • \u00a0Burst \u00a0Aggregation (BA), responsible for collecting data from legacy networks and building the burst unit<\/li>\n
          • impact on the overall network operation by the control of the burst characteristics<\/li>\n
          • in order to reduce the burst loss probabilities in the network the aggregation function can segmentate data bursts for the purpose of their partially dropping in core nodes when contention occurs<\/li>\n
          • Setting up the pre-transmission offset time<\/li>\n
          • in simple fixed offset scheme, the offset time is calculated as a sum of the total processing time at all the intermediate hops<\/li>\n
          • offset time is one of the crucial OBS network parameter, since his incorrect estimation has impact on data lost<\/li>\n
          • Sending the control packet<\/li>\n
          • Sending the burst<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"

            Optical Burst Switching (OBS) is an optical network technology that aims to improve the use of optical networks resources<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7607],"tags":[6635,6646,6645,6632,6647,6648,6624,6649,6622,6636,6639,6641,6623,6625,6627,6643,6630,6631,6628,6626,6634,6621,6633,6637,6638,6642,6640,6644,6650,6629],"class_list":["post-3595","post","type-post","status-publish","format-standard","hentry","category-networking","tag-all-optical-switch-and-transistor-gated-by-one-stored-photon","tag-burst-network","tag-bursty-traffic-in-network","tag-light-sensitive-transistor","tag-network-burst","tag-obs-network","tag-optical-burst-switching","tag-optical-busrt-switched-networks","tag-optical-circuit-switching-pdf","tag-optical-cpu","tag-optical-network-switch","tag-optical-packet-switching-network","tag-optical-packet-switching-wikipedia","tag-optical-switches-types","tag-optical-switching","tag-optical-switching-and-networking","tag-optical-transistor-pdf","tag-optical-transistor-ppt","tag-photonic-integrated-circuit","tag-photonic-switch","tag-photonic-transistor","tag-searches-related-to-optical-circuit-switching","tag-single-photon-transistor","tag-switch-network","tag-switching-in-networking-pdf","tag-switching-network-ppt","tag-switching-networks-pdf","tag-synchronous-optical-network","tag-track-obsnetworks","tag-working-of-optical-transistor"],"_links":{"self":[{"href":"https:\/\/www.wikitechy.com\/technology\/wp-json\/wp\/v2\/posts\/3595","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.wikitechy.com\/technology\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.wikitechy.com\/technology\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.wikitechy.com\/technology\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.wikitechy.com\/technology\/wp-json\/wp\/v2\/comments?post=3595"}],"version-history":[{"count":0,"href":"https:\/\/www.wikitechy.com\/technology\/wp-json\/wp\/v2\/posts\/3595\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.wikitechy.com\/technology\/wp-json\/wp\/v2\/media?parent=3595"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.wikitechy.com\/technology\/wp-json\/wp\/v2\/categories?post=3595"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.wikitechy.com\/technology\/wp-json\/wp\/v2\/tags?post=3595"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}