DocumentCode :
825028
Title :
Elastic service availability: utility framework and optimal provisioning
Author :
Xu, Dahai ; Li, Ying ; Chiang, Mung ; Calderbank, Robert A.
Author_Institution :
Dept. of Electr. Eng., Princeton Univ., Princeton, NJ
Volume :
26
Issue :
6
fYear :
2008
Firstpage :
55
Lastpage :
65
Abstract :
Service availability is one of the most closely scrutinized metrics in offering network services. It is important to cost- effectively provision a managed and differentiated network with various service availability guarantees under a unified platform. In particular, demands for availability may be elastic and such elasticity can be leveraged to improve cost-effectiveness. In this paper, we establish the framework of provisioning elastic service availability through network utility maximization, and propose an optimal and distributed solution using differentiated failure recovery schemes. First, we develop a utility function with configurable parameters to represent the satisfaction perceived by a user upon service availability as well as its allowed source rate. Second, adopting Quality of Protection [1] and shared path protection, we transform optimal provisioning of elastic service availability into a convex optimization problem. The desirable service availability and source rate for each user can be achieved using a price-based distributed algorithm. Finally, we numerically show the tradeoff between the throughput and the service availability obtained by users in various network topologies. This investigation quantifies several engineering implications. For example, indiscriminately provisioning service availabilities for different kinds of users within one network leads to noteworthy sub-optimality in total network utility. The profile of bandwidth usage also illustrates that provisioning high service availability exclusively for critical applications leads to significant waste in bandwidth resource.
Keywords :
quality of service; telecommunication network reliability; elastic service availability; elasticity; network services; optimal provisioning; protection quality; utility framework; Availability; Bandwidth; Distributed algorithms; Elasticity; Network topology; Protection; Quality of service; Resource management; Throughput; Utility programs;
fLanguage :
English
Journal_Title :
Selected Areas in Communications, IEEE Journal on
Publisher :
ieee
ISSN :
0733-8716
Type :
jour
DOI :
10.1109/JSACOCN.2008.030607
Filename :
4588333
Link To Document :
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