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An optical buffering architecture based-on traffic load selection was put forward for optical packet switching networks in the paper. For improving the limited fiber delay lines utilization, the segment shared buffering mechanism be used to configure the output fiber delay lines and the output/feedback shared buffer module configuration using degenerate model. When the traffic load is larger than...
As optical networking becomes a promising choice to meet the ever-increasing demands on bandwidth, constructing multicast wavelength division multiplexing (WDM) switching networks with cheap components and low complexity is a key issue. On the basis of three-stage Clos network, we propose an optimal model of strictly nonblocking multicast (SNBM) WDM optical switching networks. Our analysis shows that...
Different dynamic routing and wavelength assignment algorithms for WDM optical networks are described in this paper. A new dynamic algorithm based on the layered graph model and called Multi-object Optimal Algorithm (MOA) is proposed. A distinguished feature of MOA algorithm is that it employs more accurate network information than the existing algorithms on the availability of both the number of...
As the bi-directional failure notification may cause signaling burst conflict in a short time, a mechanism named single-node failure notification (SNFN) based on RSVP-TE (resource reservation protocol - traffic engineering) is proposed. SNFN implemented by extending the RSVP-TE protocol rules the node issuing the notification signaling call according to ordered numbers, no matter up-stream or downstream...
Generalized Multi-Protocol Label Switching (GMPLS) based optical networks are viewed as a promising network infrastructure for the next generation network (NGN) development. By pre-configuring the resources of dynamic optical networks, we can reconstruct the physical topology, thus increase the number of direct routes between potentially heavily loaded physical node pairs and optimize the performance...
The network coding paradigm enables better resource utilization and improves throughput in communication networks, thus, employing network coding in all-optical multicast networks will facilitate the future development of effective optical networks. However, some properties of optical networks, such as limited buffering and weak logic operation capabilities, restrict the application of network coding...
The hierarchical routing and wavelength assignment problem in Automatic Switched Optical Network (ASON) is researched. Based on our analysis, three adaptive algorithms called MLLR (Multi-Layer Least Loaded Routing Algorithm), WMLCR (Wavelength-graph-based Multi-Layer Least Congestion Routing Algorithm) and BMR (Backtracking-based Multi-Layer Routing Algorithm) are proposed. A platform named AHORSP...
A novel two end-nodes initiating restoration scheme for optical networks is proposed to further reduce the restoration time, which focuses on the defect resulted by only single end-node initiating restoration in the most of current restoration schemes. Under the proposed scheme using pre-computed route, the fault indication messages trigger the source and the destination respectively, and then initiates...
In this paper, we present a method to receive multicast packets forwarded to a fiber node through a HG (Home Gateway) that has an advanced CM (cable modem) in a DOCSIS 3.0-based CATV network. As the CATV network is in a tree-and-branch structure, in case of forwarding multicast packets to a CM, they are forwarded to all the other CMs in the same fiber node. However, as all the other CMs do not join...
The frame error at the data link layer in high-speed optical access network was investigated. The Gigabit Ethernet test bed was established including a network tester, a variable optical attenuator, optical link and a purpose-built tool which allows us to examine errors on a per-octet basis. The test bed transmits pre-constructed test data frames in a standard format and captures error-containing...
Dynamic resource distribution of General Multi-protocol Label Switch (GMPLS) network provides an appropriate technology for Data-intensive transmission. This technique can support the application of optical virtual concatenation (OVC) which uses a group of wavelengths to transmit a large scale data in parallel. With RESV-TE protocol, optical channels of OVC can be easily established in GMPLS network...
The Optical Integrative Switching (OIS) networks supporting 3G is proposed in this paper. In this OIS networks which supporting 3G, four different classes of service traffic is introduced to meet the demand of 3G. We construct architecture of WDM OIS ring network which utilizes M-token signaling scheme. In the M-token access protocol, the token can be captured according to the service class. The performance...
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