DocumentCode :
1867826
Title :
Multi-path routing in optical WDM networks: Even versus uneven split bandwidth allocation
Author :
Padhi, L. ; Kartikeya, S. ; Sivalingam, Krishna M. ; Sai, S.S.
Author_Institution :
Dept. of Phys., Sri Sathya Sai Univ., Puttaparthi, India
fYear :
2010
fDate :
18-21 July 2010
Firstpage :
1
Lastpage :
5
Abstract :
In this paper, we investigate the design and performance of multi-path routing in optical wavelength division multiplexed (WDM) networks, that support traffic grooming. A circuit-switched network is considered, where connection requests arriving to the network have to be allotted an end-to-end path carrying the requested bandwidth. Traffic grooming implies that the capacity of a wavelength on a fiber link (e.g. OC-48) will be shared among several lower capacity connections (e.g. OC-3). In order to increase the network performance in terms of improved blocking probability and also to support survivable operation, a connection is split into multiple smaller sub-streams and carried on multiple sub-paths from source to destination. This is based on the Virtual Concatenation (VCAT) mechanisms used in SONET/SDH networks. One important constraint is that the differential delay among the sub-paths should be limited (e.g. 25 ms, 45 ms, etc.). In this paper, we consider mechanisms for splitting a connection request while maintaining the differential delay constraint. In particular, we study two schemes: even splitting of connection bandwidth among the constituent sub-paths; and uneven splitting of connection bandwidth. The work also considers sub-paths that are not necessarily link-disjoint. The performance analysis shows that the uneven splitting mechanism can substantially improve performance in terms of blocking probability (and other metrics) compared to the even splitting mechanism.
Keywords :
SONET; bandwidth allocation; multipath channels; optical communication; optical fibre networks; probability; telecommunication network routing; telecommunication traffic; wavelength division multiplexing; SONET/SDH networks; bandwidth allocation; blocking probability; circuit-switched network; differential delay; fiber link; multipath routing; optical WDM networks; traffic grooming; virtual concatenation; wavelength division multiplexing; Bandwidth; Delay; Optical fiber networks; Routing; SONET; Synchronous digital hierarchy; WDM networks;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Signal Processing and Communications (SPCOM), 2010 International Conference on
Conference_Location :
Bangalore
Print_ISBN :
978-1-4244-7137-9
Type :
conf
DOI :
10.1109/SPCOM.2010.5560550
Filename :
5560550
Link To Document :
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