GMPLS inter-domain network control was investigated by employing BGP-based inter-domain routing and flexible
signaling with loose hop expansion. Per-domain based operational policy was successfully applied to the establishment
of GMPLS inter-domain LSPs.
The multi-layer network for the interworking between Generalized Multi-Protocol Label Switching (GMPLS) and
Labeled Optical Burst Switching (LOBS) is nowadays attractive for the future IP/DWDM network. In this paper, an
effective protocol interface based on overlay model was proposed to enable the transparent transmission of Burst Header
Packets (BHPs) and data bursts between OBS domains via a GMPLS network, while maintaining a simple interworking
operation between LOBS and GMPLS networks. Moreover, the interface was implemented and evaluated by using a
GMPLS/LOBS testbed, and the experimental results verified that it works effectively on the GMPLS/LOBS
In order to enable the existing optical circuit switching (OCS) network to support both wavelength and subwavelength
granularities, this paper proposes overlay-based multi-layer network architecture for interworking the generalized multi-protocol
label switching (GMPLS) controlled OCS network with optical burst switching (OBS) networks. A dedicated
GMPLS border controller with necessary GMPLS extensions, including group label switching path (LSP) provisioning,
node capability advertisement, and standard wavelength label as well as wavelength availability advertisement, is
introduced in this multi-layer network to enable a simple but flexible interworking operation. The feasibility of this
proposal is experimentally confirmed by demonstrating an OBS/GMPLS testbed, in which the extended node capability
advertisement and group LSP functions successfully enabled the burst header packet (BHP) and data burst (DB) to
transmit over a GMPLS-controlled transparent OCS network.
An international field demonstration on lambda-based Internet eXchange (IX) was conducted between China and Japan for the first time, by using Generalized Multiple Protocol Label Switching (GMPLS)-controlled Photonic Cross-connects (PXCs) and Layer 2 switches (L2SWs). The IX operation could be demonstrated to provide the resilient lambda interconnection as well as L2 interconnection to the Internet Service Providers (ISPs). Stable lambda LSP establishment, dynamic bandwidth management and fast restoration were successfully achieved in the field trial. Traffic transmission of video stream between two ISPs via the IX was also verified.
Wavelength Routed Optical Burst Switching (WR-OBS) is considered an efficient switching technique in optical networks, especially in the situation of no wavelength converters. A QoS scheme based on centralized scheduler has been proposed in this architecture. Unfortunately, this scheme has some drawbacks. To overcome these drawbacks, a distributed redundant reservation protocol and corresponding QoS scheme has been proposed in this paper. Simulation and analytical model are conducted to evaluate the performance of the newly proposed protocol in terms of burst lost probability.
Optical burst switching (OBS) provides a feasible paradigm for IP over DWDM. And one of key issues in OBS is the fast and efficient scheduling of bursts with different QoS demands. In this paper, we propose a novel window-based scheduling (WS) algorithm, in which all bursts arriving in the window are scheduled together based on priority BORA. Therefore batching scheduling can achieve an optimized BORA efficiency and then the number of contention in OBS can be reduced largely, and simultaneously priority scheduling in the window can efficiently enhance QoS. Simulation results show that the proposed WS algorithm with the optimal parameters such as window and max-delay, compared with BORA, can achieve more than one order blocking probability reduction for high priority bursts and approximately 3.5% improvement in bandwidth utilization at 0.8 load.
This paper investigates some key issues in designing an OBS edge node, such as burst assembler and burst scheduler, and then demonstrates a prototype of the OBS edge node based on current technology level. Experimental results verify various modules in the proposed OBS edge node.
Optical Burst Switching (OBS) has been proposed to be a competitive switching technology for DWDM networks. However, the abrupt burst for large traffic loads will result in unbearable performance degradation in the traditional JET network. To combat with the load sensitivity, a wavelength-routed OBS (WR-OBS) network architecture was confirmed effective. In this paper, we have proposed a distributed control WR-OBS network architecture combining JET protocol with a two-way reservation method. Based on this architecture, two new resource reservation protocols are compared by evaluating their performance. Then based on the Reduced Load Approximation, which is often used in the analysis of the circuit switch network, a novel analysis method was derived to evaluate the blocking performance of the network. And then we have developed a simulation model to evaluate the performance of the network and validate the proposed analysis method. Analytical and simulation results have indicated that the proposed architecture outperforms the traditional JET OBS network in burst blocking probability with a good trade-off between efficiency and complexity.