In this paper, a selective burst discarding scheme for deflection routing in OBS networks is proposed. The
discarding scheme is based on the number of traversed hops, the number of remaining hops and burst size. The
proposed scheme controls superfluous deflection in order to use the network resource efficiently. Simulation results
show that the scheme can achieve a high performance.
Designing efficient bandwidth allocation algorithms is a critical issue in EPON. In this paper, a novel DBA
algorithm is presented to efficiently and fairly allocate bandwidth among different users. This algorithm is integrated
with non-strict priority scheduling and priority queuing to implement a cost effective EPON network with QoS
Recently wireless mesh network has been gaining increasing attention and early versions are being deployed as
municipal access solutions to eliminate the wired drop to every wireless router at customer premise. In this paper, we
propose a novel access network using reconfigurable optical burst switching grid network and wireless mesh network.
The proposed access network architecture saves network deployment cost because fiber need not penetrate to each end
user. We also propose a hierarchical routing protocol to enhance the routing efficiency.
The routing technology is one of the key technologies in Automatic Switched Optical Networks (ASON). In this paper,
we proposed a hierarchical approach for the dynamic establishment of constraint-based ligbtpaths in an ASON network.
The algorithm performs multi-constraint path calculation on a transformed graph of interconnected border routers to find
a feasible route based on the global state information present in each border router. We presented simulation results that
have shown that the suggested scheme is capable of satisfying the requested with acceptable blocking probability at
different traffic loads.
A Grid is a very large-scale network computing system that can potentially scale to Internet size, and the network
computing system can be viewed as a virtual computer consisting of a networked set of heterogeneous machines that
agrees to share their local resources with each other. In this paper, we proposed a contention resolution scheme for
supporting Grid services in the OBS network. The numerical simulation was performed to evaluate the performance of
the proposed scheme.
In this paper, an architecture of Optical Burst Switched WDM ring network is studied. In the studied OBS ring network, every node is equipped with one tunable transmitter and one fixed-tuned receiver (TTFR) operating on a given wavelength that identifies the node. TTFR type ring network has an advantage that no receiver collisions occur and each node can detect channel collision by transmitter side. By computer simulations, we evaluate the performance of throughput, End-to-End delay and queue size. As a result, we show the performance effectiveness of our proposed access protocol.
In this paper, we study access protocol for multicasting in an optical burst switched (OBS) WDM ring environment. Ring nodes are equipped with a single fixed transmitter and tunable receiver (FTTR). Signaling is done via a dedicated control wavelength. The performance of the multicast access protocol is analyzed by simulation.
In this paper, we focus on the study of the characterization of Ethernet traffic and burst assembly algorithm in OBS networks. We investigate the traffic properties before and after burstification in edge router of Ethernet over OBS network. Self-similar Hurst parameter is compared through R/S plot.
In this paper, we study an architecture of optical burst switching ring network. In our studied OBS ring network, each node is equipped with one tunable transmitter and one fixed receiver (TTFR) for data wavelengths and a pair of fixed transceiver for a control wavelength. Additionally, a new access protocol based on token is proposed. By computer simulations, we evaluate the performance of throughput, queuing delay and probability of transmitting conflicts.
Optical burst switching (OBS) is one of the most important switching paradigms in the future optical WDM networks and Internet. OBS has better bandwidth utilization than OPS and has faster switching time than OCS. OBS is a promising switching technology in next generation optical internet. The issue of survivability has been among the most important research in designing an optical network. In this paper, we deliver optical protection & restoration and MPLS protection & restoration. Then we present a survivable OBS network using a multiple-ring approach.
OBS is more flexible and has higher bandwidth utilization than OCS; on the other hand, it is more feasible than OPS. OBS is the ideal switching technology at present. In this paper, we study OBS ring network with tunable transceivers. To reduce the high cost per node of an OBS ring network, a possible solution is to use tunable transceivers at the nodes. Efficient tuning strategies of these transceivers are required to maximize the ring bandwidth capacity and mitigate the effect of tuning latency. We propose a transmitter tuning strategy and a receiver tuning strategy and simulate the proposed tuning strategies and present the result and analyze their performances in OBS ring network.