In this paper, we propose and describe a new distributed reservation protocol for establishing li... more In this paper, we propose and describe a new distributed reservation protocol for establishing lightpaths in multi-domain optical networks. Distributed reservation scheme is a promising solution for resource reservation and path computation element (PCE), proposed by IETF and considered as a promising scheme to deal with the issue of path computation in support of multi-domain networks, establishes architecture to solve the reservation problem in multi-domain network. Thus, we propose a novel distributed reservation mechanism (PBDR) for PCE-based multi-domain optical network to ease the inefficiency of the step by step reservation process (Source Initiated Reservation and Destination Initiated Reservation). Also, we evaluate the performance of the proposed PBDR through simulation and the result shows the efficiency and availability of the distributed reservation scheme proposed in multi-domain optical network.
In optical networks, fault detection is an important aspect of network management system, also a ... more In optical networks, fault detection is an important aspect of network management system, also a prerequisite to the protection/restoration process triggered when abnormal conditions or break-downs of links or nodes happen in the networks. The ever-growing development of optical networks, such as the division of domains and the diversity of the techniques, protocols and administration policies adopted by different network operators, challenges the traditional fault localization methods applied in single domain networks. This paper investigates the fault localization problems for single-domains, and then extends it into multi-domain optical networks. A Multi-Domain Layered Fault Localization (MD-LFL) Model is proposed to address this problem. And then its application scenario is presented to show its effectiveness by sub-dividing the computational complexity among domains and introducing cooperative diagnosis between domains.
Three operational routing algorithms for hierarchical Automatically Switched Optical Networks (AS... more Three operational routing algorithms for hierarchical Automatically Switched Optical Networks (ASON) are proposed. Their effectiveness is demonstrated in terms of blocking probability and time performance on the simulation platform developed.
It is essential for us to do research on collaboration mechanism in management-control plane in i... more It is essential for us to do research on collaboration mechanism in management-control plane in intelligent optical networks. We propose an interaction schemes using mobile agent between the control plane and management plane to solve information collection delay and management messages congestion. We construct the integrated platform by mobile agent.
To provide resilient services over an optical network, we first enhance virtual network represent... more To provide resilient services over an optical network, we first enhance virtual network representing a service request into a failure dependent and enhanced VN (FD-EVN), then map FD-EVN to the optical network with shared protection.
An energy efficiency scheme based on the coordination of management and control is proposed to re... more An energy efficiency scheme based on the coordination of management and control is proposed to reduce the power consumption in multi-domain WSON. Experiments are conducted on the energy efficient multi-domain WSON testbed (EEMWT) to assess the performance of the scheme.
In this paper, we propose a colorless, directionless and contentionless (C/D/C) ROADM architectur... more In this paper, we propose a colorless, directionless and contentionless (C/D/C) ROADM architecture using bandwidth variable carriers select switches (BV-WSS) for elastic optical network and illustrate various advantages offered by it. We also discuss some extensions for current control plane of ASON framework.
In this paper, we propose and describe a new distributed reservation protocol for establishing li... more In this paper, we propose and describe a new distributed reservation protocol for establishing lightpaths in multi-domain optical networks. Distributed reservation scheme is a promising solution for resource reservation and path computation element (PCE), proposed by IETF and considered as a promising scheme to deal with the issue of path computation in support of multi-domain networks, establishes architecture to solve the reservation problem in multi-domain network. Thus, we propose a novel distributed reservation mechanism (PBDR) for PCE-based multi-domain optical network to ease the inefficiency of the step by step reservation process (Source Initiated Reservation and Destination Initiated Reservation). Also, we evaluate the performance of the proposed PBDR through simulation and the result shows the efficiency and availability of the distributed reservation scheme proposed in multi-domain optical network.
In optical networks, fault detection is an important aspect of network management system, also a ... more In optical networks, fault detection is an important aspect of network management system, also a prerequisite to the protection/restoration process triggered when abnormal conditions or break-downs of links or nodes happen in the networks. The ever-growing development of optical networks, such as the division of domains and the diversity of the techniques, protocols and administration policies adopted by different network operators, challenges the traditional fault localization methods applied in single domain networks. This paper investigates the fault localization problems for single-domains, and then extends it into multi-domain optical networks. A Multi-Domain Layered Fault Localization (MD-LFL) Model is proposed to address this problem. And then its application scenario is presented to show its effectiveness by sub-dividing the computational complexity among domains and introducing cooperative diagnosis between domains.
Three operational routing algorithms for hierarchical Automatically Switched Optical Networks (AS... more Three operational routing algorithms for hierarchical Automatically Switched Optical Networks (ASON) are proposed. Their effectiveness is demonstrated in terms of blocking probability and time performance on the simulation platform developed.
It is essential for us to do research on collaboration mechanism in management-control plane in i... more It is essential for us to do research on collaboration mechanism in management-control plane in intelligent optical networks. We propose an interaction schemes using mobile agent between the control plane and management plane to solve information collection delay and management messages congestion. We construct the integrated platform by mobile agent.
To provide resilient services over an optical network, we first enhance virtual network represent... more To provide resilient services over an optical network, we first enhance virtual network representing a service request into a failure dependent and enhanced VN (FD-EVN), then map FD-EVN to the optical network with shared protection.
An energy efficiency scheme based on the coordination of management and control is proposed to re... more An energy efficiency scheme based on the coordination of management and control is proposed to reduce the power consumption in multi-domain WSON. Experiments are conducted on the energy efficient multi-domain WSON testbed (EEMWT) to assess the performance of the scheme.
In this paper, we propose a colorless, directionless and contentionless (C/D/C) ROADM architectur... more In this paper, we propose a colorless, directionless and contentionless (C/D/C) ROADM architecture using bandwidth variable carriers select switches (BV-WSS) for elastic optical network and illustrate various advantages offered by it. We also discuss some extensions for current control plane of ASON framework.
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