Overload control and performance evaluation in a Parlay/OSA environment

Jens K Andersson

Research output: ThesisLicentiate Thesis

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To increase the pace of development and deployment of new services and
applications in telecommunication networks, new service architectures
have been proposed. Parlay/OSA is one of the proposals that has aroused
most attention. By providing network functionality via Application Program
Interfaces (APIs), Parlay/OSA facilitates creation of telecommunication
services and applications for independent software developers. With
Parlay/OSA there is no longer any requirement for knowledge and technical
skills of telecommunications when creating new applications. A Parlay/
OSA environment introduces gateways, which provide the
applications with abstracted network functionality. A gateway translates
the requests for abstracted functionality to telecommunication protocols
and signalling. Parlay/OSA is a contract driven architecture where several
constraints coexist. To fulfil the constraints and to protect the gateways
from shutting down, overload control mechanisms are needed.
This thesis proposes and evaluates different overload control mechanisms
in a Parlay/OSA environment. The main objectives of the overload
control mechanisms are to protect the system and to maintain a high
throughput. Important issues that are discussed are measurement strategies,
overload control actions, and how different priorities and time constraints
should be considered. Also, the proposed overload control
mechanisms consider some guiding principles from the specifications of
Parlay/OSA. In the scope of this thesis both distributed and single server
systems are investigated.
Original languageEnglish
Awarding Institution
  • Department of Electrical and Information Technology
  • Kihl, Maria, Supervisor
  • Nyberg, Christian, Supervisor
Publication statusPublished - 2004

Bibliographical note

The information about affiliations in this record was updated in December 2015.
The record was previously connected to the following departments: Department of Communication Systems (011020000)

Subject classification (UKÄ)

  • Communication Systems


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