DocumentCode :
2284535
Title :
Dynamic reconfiguration of logical topology for WDM networks under traffic changes
Author :
Tran, Phuong Nga ; Killat, Ulrich
Author_Institution :
Dept. of Commun. Networks, Hamburg Univ. of Technol., Hamburg
fYear :
2008
fDate :
7-11 April 2008
Firstpage :
279
Lastpage :
286
Abstract :
In this paper, we present a new approach to solve the logical topology reconfiguration problem for IP over WDM networks under dynamic traffic. Based on the measurement of lightpaths´ load, a change in the logical topology is made if some lightpath is highly loaded or under utilized. The change can be adding/deleting several lightpaths or just rerouting traffic in the current logical topology. The key idea of our approach is to determine a new logical topology so that the maximum lightpaths´ load at the time of reconfiguration is limited by a load-balance indicator, which is pre-defined as a system´s parameter. It ensures the network performance (in terms of lightpath utilization) and also increases the lifetime of the logical topology under dynamic traffic changes. Moreover, our approach ensures no network disruption during the reconfiguration process while allowing adding or deleting multiple lightpaths at the same time. The algorithm is formulated as a mixed integer linear programming (MILP). The performance is investigated and compared with Gencata´s approach through an illustrative numerical example. Because the proposed MILP is complex and can be applied only to small networks, an approximate model is also presented to solve the problem for some real-size networks.
Keywords :
IP networks; integer programming; linear programming; optical fibre networks; telecommunication network topology; wavelength division multiplexing; Gencata approach; IP; WDM networks; dynamic reconfiguration; lightpath; logical topology; mixed integer linear programming; traffic changes; Network topology; Optical fiber networks; Optical interconnections; Optical receivers; Optical transmitters; Spine; Telecommunication traffic; Traffic control; WDM networks; Wavelength division multiplexing; IP over WDM; dynamic reconfiguration; logical topology; mixed-integer linear programming;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Network Operations and Management Symposium, 2008. NOMS 2008. IEEE
Conference_Location :
Salvador, Bahia
ISSN :
1542-1201
Print_ISBN :
978-1-4244-2065-0
Electronic_ISBN :
1542-1201
Type :
conf
DOI :
10.1109/NOMS.2008.4575145
Filename :
4575145
Link To Document :
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