NDLI: Dynamics of load-sensitive adaptive routing

Content Provider	IEEE Xplore Digital Library
Author	Hao Wang Ito, M.R.
Copyright Year	2005
Description	Author affiliation: Carleton Univ., Ottawa, Ont., Canada (Hao Wang)
Abstract	Shortest path first (SPF) routing protocols, such as OSPF and IS-IS are currently the dominant intra-domain IP routing protocols and are widely used in the ISP backbones. Although the traffic on the Internet is highly dynamic, OSPF and IS-IS are not adaptive to the changing traffic, because the shortest path generated by these protocols are based on the link weights, which are fixed and usually can not be changed during network operation. This paper investigates a way of changing the weights in OSPF/IS-IS adaptively according to the changing traffic load on the links. The feedback effect and the stability issue of adaptive routing are analyzed from a control system point of view. The paper shows why minimal-delay adaptive routing, such as the routings in the early ARPANET, is not stable, and proposes some techniques to make our load-sensitive adaptive routing (LSAR) stable. Finally, the performance of LSAR is evaluated by simulation. The result shows that LSAR can significantly improve the QoS of the network by increasing network throughput and reducing packet drop ratio.
Starting Page	213
Ending Page	217
File Size	737856
Page Count	5
File Format	PDF
ISBN	0780389387
DOI	10.1109/ICC.2005.1494349
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-05-16
Publisher Place	South Korea
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Telecommunication traffic Routing protocols Spine IP networks Feedback Stability analysis Programmable control Adaptive control Control system analysis Control systems
Content Type	Text
Resource Type	Article

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