Lightpath reconfiguration management system for IP-over-CWDM networks with ROADMs, based on equivalent graph method

Zahilah, Raja; Nishiuma, Soichiro; Nooruzzaman, Md.; Thủy, Nguyễn Thị Thanh; Koyama, Osanori; Katsuyama, Yutaka

doi:10.1109/tencon.2009.5396025

Cited by 5 publications

(5 citation statements)

References 4 publications

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“…The measured losses were compared with the total loss values listed in Table IV. The loss values given by the system agreed [8] with the measured values within 1 dB, which was as small as 3.7 % of the loss budget.…”

Section: B System Performancesupporting

confidence: 70%

“…The lightpath design and management system was designed and implemented [5,7,8] for IP-over-CWDM networks with S-ROADMs. Table I summarizes the functions of the system.…”

Section: Parallel Processing and Upgradability For Lightpath Desigmentioning

confidence: 99%

“…When all the losses of the designed lightpaths are within the loss budgets, the lightpaths can connect the nodes. This is the initial LP management step [8], based on the losses. The network is constructed, and can be used.…”

mentioning

confidence: 99%

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Lightpath design & management tool for IP-over-CWDM networks with ROADMs

Katsuyama

Zahilah

Ogino

et al. 2010

2010 14th International Telecommunications Network Strategy and Planning Symposium (NETWORKS)

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A lightpath design and management tool with parallel processing capabilities and a flexible upgradability, allowing new functions to be added to the system without any system program changes, has been designed and implemented for IP-over-CWDM networks with ROADMs. The tool can process applications composed of some sub applications in parallel in multi machines for high-speed performance. In addition, the tool was designed to have a flexible upgradability, i.e. no changes of the system programs are required when adding the new functions. The system functions are to design lightpaths and wavelengths allocated to ROADMs for the lightpaths required to groom given traffic. The tool also can search possible lightpath routes made by ROADMs with specified switch states, and output the total optical losses of the routes. By the tool implemented in one management and 3 calculation machines for the parallel processing, the total time to obtain the results for a 5-node IP-over-CWDM network was reduced down to 65 % of the total time by the tool with a single machine without parallel processing. The tool enables the network administrators to design and manage the lightpath reconfigurations effectively without errors by avoiding making unlinked lightpaths through routes with higher losses to connect nodes, before the reconfiguration.Index Terms-IP-over-CWDM network, lightpath design, management tool, parallel processing, upgradability I. INTRODUCTIONPTICAL networks are introduced widely to satisfy the increasing traffic demands for the Internet. Optical networks are also expected to provide effective broadband services in optical LAN (Local Area Network) for business use, campus networks, factory networks, and regional networks connecting local governments and research organizations etc., by satisfying different application requirements. The CWDM (Coarse Wavelength-Division Multiplexing) technologies are effective for such applications, because no wavelength stability control is necessary, and therefore the devices are low cost. The communication services are provided by connecting nodes with lightwaves and one optical connection with a wavelength is called a lightpath. Such networks have to be operated and maintained by the network administrators. The important tasks by the administrators are lightpath configurations in the initial network construction and reconfigurations [1, 2] during providing services in the network to avoid traffic congestions, depending on the demand changes. For the reconfiguration purpose, ROADMs [1] (Reconfigurable Optical Add/Drop Multiplexers) were proposed and investigated.We have developed a stackable ROADM (S-ROADM) for IP-over-CWDM networks [3]. The S-ROADM can be constructed by connecting modules with add/drop and passing-through functions for one wavelength, respectively, The modules enable the ROADM to have wavelength transparency flexibly in a stackable way, as described in the next section. The lightpath reconfiguration performance by the S-ROADMs was evaluated experimentally in a bi-direct...

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Section: B System Performancesupporting

confidence: 70%

“…The lightpath design and management system was designed and implemented [5,7,8] for IP-over-CWDM networks with S-ROADMs. Table I summarizes the functions of the system.…”

Section: Parallel Processing and Upgradability For Lightpath Desigmentioning

confidence: 99%

See 1 more Smart Citation

Lightpath design & management tool for IP-over-CWDM networks with ROADMs

Katsuyama

Zahilah

Ogino

et al. 2010

2010 14th International Telecommunications Network Strategy and Planning Symposium (NETWORKS)

Self Cite

View full text Add to dashboard Cite

show abstract

“…9. After that, the fiber lengths between nodes were input, and the losses were calculated by the route management system [11] for the lightpaths in LS 0 , and the loss values were compared with the loss budget. No amplifiers were added to the network, because the calculated losses of all the lightpaths were smaller than the loss budgets.…”

Section: Performance Of Amplifier Modulesmentioning

confidence: 99%

Stackable ROADM with optical amplifier for use in IP-over-CWDM networks

Nooruzzaman

Thủy

Zahilah

et al. 2011

The 17th Asia Pacific Conference on Communications

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A stackable module with a bidirectional CWDM amplifier has been proposed to introduce the optical amplifier into an S-ROADM for use in an IP-over-CWDM ring network, and the performance was evaluated experimentally. Packet transfer changes were monitored during the lightpath reconfigurations, including 2 lightpaths which needed optical amplifications. The result clarified that the lightpaths were reconfigured successfully, including the remote activation of the amplifiers. As a result, the stackable feature of the amplifier module enables us to provide the cost-effective introduction into the network on an implement-it-when-necessary based service in a fully compatible way with the existing stackable ROADM modules, when constructing the S-ROADM with an amplifier. Therefore, the amplifier module can be used in the same way as the ROADM modules to construct the S-ROADM, providing manually adding capability of the amplifier to in-service networks. Thus, the amplifier module has a big advantage to use it flexibly and economically in the IP-over-CWDM networks.

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“…1). In our research, we offered a wavelength division multiplexing (WDM) communication network over POF due to the rapid increase of traffic demands [2,3]. WDM is the network that allows the transmission of multimedia data in IVI system over multiple wavelength (color) and thus greatly increases the POF's bandwidth.…”

Section: Introductionmentioning

confidence: 99%