Source-oriented topology aggregation with multiple QoS parameters in hierarchical ATM networks
Korkmaz, T.
Krunz, M.
Dept. of Electr. & Comput. Eng., Arizona Univ., Tucson, AZ, USA;
This paper appears in: Quality of Service, 1999. IWQoS '99. 1999 Seventh International Workshop on Publication Date: 31 May-4 June 1999
On page(s):
137
- 146
Meeting Date: 05/31/1999
- 06/04/1999
Location: London
ISBN: 0-7803-5671-3
Digital Object Identifier: 10.1109/IWQOS.1999.766488
Current Version Published: 2002-08-06
Abstract
We investigate the problem of topology aggregation (TA) for scalable, QoS-based routing in ATM networks. TA is the process of summarizing the topological information of a subset of network elements. This summary is flooded throughout the network, and is used by various nodes to determine appropriate routes for connection requests. A key issue in the design of a TA scheme is the appropriate balance between compaction and the corresponding routing performance. The contributions of this paper are twofold. First, we introduce a source-oriented approach to TA, which provides better performance than existing approaches. The intuition behind this approach is that the advertised topology-state information is used by source nodes to determine tentative routes for connection requests. Accordingly, only relevant information to source nodes needs to be advertised. We integrate the source-oriented approach into three new TA schemes that provide different tradeoffs between compaction and accuracy. Second, we extend our source-oriented approach to multi-QoS-based TA. A key issue here is the determination of appropriate values for the multiple QoS parameters that are associated with a logical link. Two new approaches to computing these values are introduced. Extensive simulations are used to evaluate the performance of our proposed schemes
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