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Search & Compare (S&C) - Reservation Protocol in High-Speed Optical Networks

机译:搜索和比较(S&C)-高速光网络中的预留协议

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The Search & Compare protocol uses outband signalling. It is the reason why the Wavelength-division multiplexing (WDM), i.e. multiple WDM channels, can be utilised and signalling channel may be multiplexed in the same fibre [1-8]. Our new proposed reservation protocol was created for Optical burst switching (OBS) networks, which combine the best of optical circuit switching and packet switching without optical buffering or packet-level parsing [6, 8]. This fact can help us to build terabit optical routers and realize IP over WDM transmission. Currently, there are several reservation protocols, such as Resource Reservation Protocol - Traffic Engineering (RSVP-TE), Intermediate-node Initiated Reservation (IIR) [2], Robust Fast Optical Reservation Protocol (RFORP) [6, 7] and S-RFORP [1]. RSVP-TE reservation protocol is primary designed for multiprotocol label- switched (MPLS) networks, which support synchronous optical networks (SONET), synchronous digital hierarchy (SDH) and dense wavelength-division-multiplexed (DWDM) networks [3, 5]. It is also possible to use RSVP-TE for generalized MPLS (GMPLS). All of these protocols have positive and negative features. The best one is S-RFORP. However, this reservation protocol has one disadvantage. S-RFORP is used in intra-segment, node by node discovery and reservation. This means discovery or reservation time of a segment depends on the number of active nodes, i.e. the more nodes in the segment the worse the discovery and the reservation time [1].
机译:搜索和比较协议使用带外信令。这就是为什么可以使用波分复用(WDM),即多个WDM信道,并且可以在同一根光纤中复用信令信道的原因[1-8]。我们为光突发交换(OBS)网络创建了我们新提出的预留协议,该协议将光电路交换和数据包交换的最佳功能结合在一起,而没有光缓冲或数据包级解析[6,8]。这一事实可以帮助我们构建太比特级光路由器并实现WDM传输IP。当前,有几种预留协议,例如资源预留协议-流量工程(RSVP-TE),中间节点初始预留(IIR)[2],稳健的快速光预留协议(RFORP)[6、7]和S- RFORP [1]。 RSVP-TE预留协议主要用于多协议标签交换(MPLS)网络,该网络支持同步光网络(SONET),同步数字体系(SDH)和密集波分复用(DWDM)网络[3,5]。也可以将RSVP-TE用于通用MPLS(GMPLS)。所有这些协议都有积极和消极的特征。最好的是S-RFORP。但是,这种保留协议具有一个缺点。 S-RFORP用于段内,逐节点发现和保留。这意味着段的发现或保留时间取决于活动节点的数量,即段中的节点越多,发现和保留时间就越差[1]。

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