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We experimentally investigate impairment aware routing and end-to-end compensation in a WSON testbed. The extended control plane modules for QoT optimization and two compensation control strategies are realized and verified in terms of optical power adaptive adjustment.
We propose a novel resource demand model and a BFS-based algorithm for multi-domain L1VPN. The proposed model and algorithm are implemented on AMSON testbed by combining PCE and service plane, and verified by experiment results.
This paper analyzes the development tendency of optical networks under multi-service in the future, proposes an original ideology of transport adaptability in reconfigurable all-optical networks, researches on the key techniques of the complex coupling mechanism and dynamic controlling in the process of selecting lightpaths and tuning, such as the architecture of complex adaptability system (CAS)...
Translucent WDM networks use a set of sparsely but strategically placed 2R or/and 3R regenerators to overcome physical impairments and wavelength collision introduced by fully transparent networks. In this paper, we concentrate on the study of control architectures and management approaches for connection establishment in translucent networks. A hybrid OCP (optical control plane) has been proposed,...
An on-demand multi-user lightpath sharing solution supporting multi-path parallel transport is experimentally demonstrated in GMPLS-enabled lambda grid testbed for the first time. Experimental results show that end-to-end lightpath can be simultaneously employed by two or more grid users according to their dynamic requests.
We address the problem of automatic lightpath provisioning in WDM rings without wavelength conversion and present a state transition model for wavelength access control based on the WOI overhead defined in this paper.
We present an extended architecture for adaptive service provisioning in transport networks and develop an AMSON testbed for proof of the functional model of service plane.
A resource pre-configuration scheme which forms a pre-configured topology has been proposed in intelligent optical networks. Simulations results show the connection establishing time of control plane could be significantly reduced by using resource pre-configuration strategy.
This paper presents a novel testbed for multi-granularity optical switching network. All the related hardware and protocols are realized. The functions of the testbed are verified via experiment and numerical simulation.
Recently, Fabry-Perot laser diodes (FPLDs) injection-locked by spectrum sliced amplified spontaneous emission (ASE) noise as a low cost light source for wavelength division multiplexed passive optical network (WDM-PON) has been proposed and gained much attention. Spectrum sliced ASE source inherently suffers from intensity noise (IN). This IN is relative to the filter bandwidth of a spectrum sliced...
As the new services emerge, multicast function is demanded in optical networks. However, due to the high cost and complex architecture of multicast capable node, the splitter-sharing switch structure is introduced. Then, in order to make full use of the splitters equipment, we first analyze using the NSFNet and come to the conclusion that when the number of splitters is 25% of the full equipment,...
In optical multicast, because of the high cost and complex architecture of multicast capable (MC) node, splitter-sharing switch structure is introduced. To accommodate to this structure, a multicast routing algorithm in splitter-sharing optical network and a changing link weight policy to balance traffic throughput are proposed. At the same time, by extending RSVP and OSPF, an optical multicast protocol...
In this paper, we propose a novel absolute trigger for wavelength availability advertisement in the optical wavelength-routed networks, i.e. wavelength state difference based trigger (DT). The existing triggers do not consider whether the wavelength availability state is changing from free to busy or from busy to free. But these two kinds of changes do not affect the routing in the same way which...
The introduction of control plane in ASON enables optical network intellective for the first time. As the channel to transfer message in control plane, the reliability of control channel significantly influences the performance of network. In traditional mechanism, control node should report fault to manager when control channel is down. In this paper, a new method of switching control channel is...
A novel backward reservation protocol with intermediate retry is proposed for wavelength-continuous lightpaths establishment in wavelength-routed optical networks. The results reveal it improves the success rate in lightpaths setup considerably without much incrementing the setup delay.
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