Dimesioning and resource provisioning for IP/MPLS-over-WDM network

Author(s):  
Partha Goswami ◽  
S.K. Ghosh ◽  
Debasish Datta
Author(s):  
Swati Bhalaik ◽  
Ashutosh Sharma ◽  
Rajiv Kumar ◽  
Neeru Sharma

Objective: Optical networks exploit the Wavelength Division Multiplexing (WDM) to meet the ever-growing bandwidth demands of upcoming communication applications. This is achieved by dividing the enormous transmission bandwidth of fiber into smaller communication channels. The major problem with WDM network design is to find an optimal path between two end users and allocate an available wavelength to the chosen path for the successful data transmission. Methods: This communication over a WDM network is carried out through lightpaths. The merging of all these lightpaths in an optical network generates a virtual topology which is suitable for the optimal network design to meet the increasing traffic demands. But, this virtual topology design is an NP-hard problem. This paper aims to explore Mixed Integer Linear Programming (MILP) framework to solve this design issue. Results: The comparative results of the proposed and existing mathematical models show that the proposed algorithm outperforms with the various performance parameters. Conclusion: Finally, it is concluded that network congestion is reduced marginally in the overall performance of the network.


2020 ◽  
Vol 172 ◽  
pp. 107170
Author(s):  
Abolfazl Hajisami ◽  
Tuyen X. Tran ◽  
Ayman Younis ◽  
Dario Pompili

2020 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Vidya Sukumara Panicker ◽  
Rajesh Srinivas Upadhyayula

PurposeThis paper attempts to examine the activity and involvement of board of directors in internationalization activities of firms in emerging markets, by evaluating the resource provisioning roles of interlocks provided by board of directors, and the frequency of board meetings. We demonstrate that the effectiveness of board involvement is contingent upon the levels of family ownership in firms since family ownership could impact the firm’s ability to utilize the presence of different types of board members.Design/methodology/approachThe authors test our hypotheses on a sample of listed Indian companies, extracted from the Prowess database published by the Centre for Monitoring Indian Economy (CMIE), a database of the financial performance of Indian companies. On a panel of 3,133 firm years of 605 unique Indian firms with foreign investments, over a time period of 2006–2017, the authors apply different estimation techniques.FindingsThe results demonstrate that both board meeting frequency and director interlocks are instrumental in supporting internationalization activities in emerging market firms. However, family ownership moderates the role of insider and independent interlocks on internationalization investments in different ways; the authors find that interlocks provided by independent directors support internationalization activities in family firms, whereas those provided by insider directors do not. Further, the study also finds that board meetings are less effective in internationalization of family firms.Practical implicationsThe authors conclude that family firms aiming at international diversification require to develop more connected and networked independent directors to enable internationalization in firms. While independent director interlocks enhance the international investments, it is also useful to know that board meetings are ineffective in utilizing the resources in family firms. This points to the possibility that family firms should device mechanisms to integrate family meetings with board meetings so that they can utilize the within-family processes to aid in their internationalization decisions.Originality/valueThe study contributes to resource dependence theory by understanding its limiting role in family firms. Theoretically, it helps delineate the limiting resource provision role of the insider directors vis-à-vis independent directors. The authors argue that the resource provision role of insider director interlocks does not effectively help in internationalization in comparison to independent director interlocks in family-dominated firms. Consequently, the study shows the limiting role of resource provision and utilization by family-owned firms in comparison to non-family-owned firms.


2021 ◽  
pp. 1-14
Author(s):  
Sampa Rani Bhadra ◽  
Ashok Kumar Pradhan ◽  
Utpal Biswas

For the last few decades, fiber optic cables not only replaced copper cables but also made drastic evolution in the technology to overcome the optoelectronic bandwidth mismatch. Light trail concept is such an attempt to minimize the optoelectronic bandwidth gap between actual WDM bandwidth and end user access bandwidth. A light trail is an optical bus that connects two nodes of an all optical WDM network. In this paper, we studied the concept of split light trail and proposed an algorithm namely Static Multi-Hop Split Light Trail Assignment (SMSLTA), which aims to minimize blocking probability, the number of static split light trails assigned and also the number of network resources used, at the same time maximizing the network throughput. Our proposed algorithm works competently with the existing algorithms and generates better performance in polynomial time complexity.


Author(s):  
Amine Abouaomar ◽  
Soumaya Cherkaoui ◽  
Zoubeir Mlika ◽  
Abdellatif Kobbane

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