SIP and H.323 are currently the most prominent call processing and media control protocols for VoIP and multimedia applications. Since the introduction of the two standards in the mid 1990’s their review and extension to support new and improved services has been an ongoing activity. The interoperability of SIP and H.323 has attracted much attention of recent because it is envisaged that both protocols will continue to be deployed for VoIP and multimedia.
The main objective of this project therefore, is to develop an interworking solution that will enable hybrid SIP-H.323 communication. An in-depth study of both protocols carried out from the outset revealed the need to design a software protocol interworking function (PIWF) to translate from one protocol to the other. However, the complexity of the PIWF as well as its requirement to handle real-time concurrent communication necessitated the use of formal methodology, in particular UML and SDL, in its development. UML is used in the requirements specification, analysis and design stages, while the resulting design is modelled in SDL for verification. The SDL model is simulated and the outcome correlates with the expected behaviour thus validating the design. Indeed, the application of formal methodology has been found to be a very effective means of identifying and eliminating design flaws prior to implementation, and hence, will lead to high reliability and significant reduction in overall development cost and effort.
Keywords-: VoIP, SIP, H.323, Interworking,UML,SDL
- Creative Commons: Attribution-NonCommercial CC BY-NC
- Creator: arshad farhad
- Language: English
- Year: 2005-01-02
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