A survey of WDM network reconfiguration: Strategies and triggering methods

Wu, Jing

doi:10.1016/j.comnet.2011.05.012

Cited by 24 publications

(29 citation statements)

References 75 publications

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“…In a simple manner, the three phases are conducted sequentially and iteratively. For a comprehensive survey about VTR on SLR-WDM networks, the reader may refer to Wu [2].…”

Section: Vtr On Slr-wdm Networkmentioning

confidence: 99%

“…A reconfiguration of a lightpath means changing its originating or terminating node (or both), its route over a network, and its usage of optical devices (includes switches, wavelength converters, etc.). WDM technologies provide a capability of dynamic establishment, removal or alteration of lightpaths [2]. The goal of the VTR is to accommodate more traffic demands, as well as to optimize network operations such as cost minimization or utilization maximization [2].…”

Section: Studied Problemmentioning

confidence: 99%

“…WDM technologies provide a capability of dynamic establishment, removal or alteration of lightpaths [2]. The goal of the VTR is to accommodate more traffic demands, as well as to optimize network operations such as cost minimization or utilization maximization [2].…”

Section: Studied Problemmentioning

confidence: 99%

“…In Lee and Mukherjee [14], virtual topology reconfiguration was discussed as part of network traffic engineering, including network survivability, virtual topology engineering, and coordination among multiple layers of network architecture. SLR-WDM network reconfiguration consists of three phases [2,15]: (1) making a reconfiguration policy decision whether a reconfiguration should be conducted; (2) selecting a new virtual topology based on a certain optimization objective; and (3) migrating from the current topology to the new topology. In a simple manner, the three phases are conducted sequentially and iteratively.…”

Section: Vtr On Slr-wdm Networkmentioning

confidence: 99%

“…The goals of VTR are to optimize network resource utilization and traffic performance. These goals are achieved by changing bandwidth capacity between node-pairs or changing the way that traffic uses bandwidth [2]. Thus, in such a situation, a reconfiguration of the virtual topology is used to match it with the changing traffic [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Virtual topology reconfiguration for mixed-line-rate optical WDM networks under dynamic traffic

Din

2015

Photon Netw Commun

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For the mixed-line-rate (MLR) wavelengthdivision multiplexing (WDM) networks, each wavelength in a fiber can provide different transmitting rates (in 10/40/100 Gbps) by using different modulation formats. Since the MLR-WDM becomes a cost-efficient technique for the network upgrading, the problem of supporting virtual topology reconfiguration (VTR) becomes an important issue. In this paper, the VTR problem is studied for MLR-WDM networks under dynamic traffic demand. By monitoring traffic of the lightpaths, a reconfiguration method is proposed to follow the changes in traffic without a priori knowledge of the future traffic pattern. The proposed algorithm can optimize resource utilization and network traffic performance by either adjusting (increasing or decreasing), adding or deleting one or more lightpaths at a time. Simulations reveal the effects of the various system parameters. Specifically, we find that the proposed method adapts very well to the changes in the offered traffic on MLR-WDM networks.

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“…In a simple manner, the three phases are conducted sequentially and iteratively. For a comprehensive survey about VTR on SLR-WDM networks, the reader may refer to Wu [2].…”

Section: Vtr On Slr-wdm Networkmentioning

confidence: 99%

Section: Studied Problemmentioning

confidence: 99%

Section: Studied Problemmentioning

confidence: 99%

Section: Vtr On Slr-wdm Networkmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Virtual topology reconfiguration for mixed-line-rate optical WDM networks under dynamic traffic

Din

2015

Photon Netw Commun

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Lightpath admission control and rerouting in dynamic flex‐grid optical transport networks

2016

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In dynamic flex‐grid optical transport networks, Lightpath Admission Control (LAC) is the task of finding a Routing and Spectrum Assignment (RSA) solution for a current lightpath request; otherwise, the request is blocked if there are not enough free available resources. When rerouting is supported, one or more currently established lightpaths can be rerouted and/or assigned with a different spectrum in order to accommodate the current lightpath request. We propose LAC methods based on mixed integer linear programming that provide a RSA solution for the current request aiming to maximize the acceptance probability of future lightpath requests. When rerouting is supported, we consider that only one currently established lightpath can be rerouted. We compare the proposed methods with the traditional shortest path‐based approach through simulation. Without lightpath rerouting, the blocking probability is significantly improved. With lightpath rerouting, the number of rerouting operations is significantly decreased while the blocking probability is marginally improved. Moreover, the blocking fairness between lightpaths with different spectrum widths is improved both with and without lightpath rerouting. In all cases, the CPU times of the mixed integer linear programming approaches are a few seconds, on average. © 2016 Wiley Periodicals, Inc. NETWORKS, Vol. 69(1), 151–163 2017

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Forward-Looking WDM Network Reconfiguration with Per-Link Congestion Control

Zhang

Bochmann

et al. 2011

J Netw Syst Manage

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A survey of WDM network reconfiguration: Strategies and triggering methods

Cited by 24 publications

References 75 publications

Virtual topology reconfiguration for mixed-line-rate optical WDM networks under dynamic traffic

Virtual topology reconfiguration for mixed-line-rate optical WDM networks under dynamic traffic

Lightpath admission control and rerouting in dynamic flex‐grid optical transport networks

Forward-Looking WDM Network Reconfiguration with Per-Link Congestion Control

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