.png){kind=icon}
Return
Efficient Make-Before-Break Layer 2 Reoptimization
.png){kind=icon}
OA
AI
DOI：10.1109/TNET.2021.3078581.png)
.png){kind=icon}
Original request for help.png){kind=icon}
Share.png){kind=icon}
Save
Abstract
En 中文
Optical multilayer optimization periodically reorganizes layer 0-1-2 network elements to handle both existing and dynamic traffic requirements in the most efficient manner. This delays the need for adding new resources in order to cope with the evolution of the traffic, thus saving CAPEX. The focus of this paper is on Layer 2, i.e., on capacity reoptimization at the optical transport network (OTN) layer when routes (e.g., LSPs in MPLS networks) are making unnecessarily long detours to evade congestion. Reconfiguration into optimized routes can be achieved by re-defining the routes, one at a time, so that they use the vacant resources generated by the disappearance of services using part of a path that transits the congested section. To maintain the Quality of Service, it is desirable to operate under a Make-Before-Break (MBB) paradigm, with the minimum number of reroutings. The challenge is to determine the best rerouting order while minimizing the bandwidth requirement. We propose an exact and scalable optimization model for computing a minimum bandwidth rerouting scheme subject to MBB in the OTN layer of an optical network. Numerical results show that we can successfully apply it on networks with up to 30 nodes, a very significant improvement with respect to the state of the art. We also provide some reoptimization analysis in terms of the bandwidth requirement vs. the number of reroutings.
Keywords:
Bandwidth
Optimization
Routing
Resource management
Numerical models
IEEE transactions
Multiprotocol label switching
Network reconfiguration
rerouting
reoptimization
make-before-break
Journal
I
IF:
3.6
Papers:
4.4K
Citations:
9.5K
Organization
View more organizations
Cited Papers
Expression of prostatic TRH‐like peptides differs between species and between malignant and nonmalignant tissues.png)
The Prostate
The ProstateIF0
PREAI
ShareSaveShareSaveShareSaveShareSaveShareSaveTransition Metal Squarates, II On the Structure of Cubic (MC4O4·2H2O)3CH3COOH·H2O(M=Zn2+,Ni2+)[1]
OAAI
OAAIShareSave View more