Analysing the WAP class 2 wireless transaction protocol using coloured Petri nets

Authors:
Steven Gordon;Jonathan Billington
Affiliations:
Cooperative Research Centre for Satellite Systems, University of South Australia, Mawson Lakes, SA, Australia;Cooperative Research Centre for Satellite Systems, University of South Australia, Mawson Lakes, SA, Australia
Venue:
ICATPN'00 Proceedings of the 21st international conference on Application and theory of petri nets
Year:
2000

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Abstract

Coloured Petri nets (CPNs) are used to specify and analyse the Class 2 Wireless Transaction Protocol (WTP). The protocol provides a reliable request/response service to the Session layer in the Wireless Application Protocol (WAP) architecture. When only a single transaction is considered occurrence graph and language analysis reveals 3 inconsistencies between the protocol and service specification: (1) the initiator user can receive two TR-Invoke.cnf primitives; (2) turning User Acknowledgement on doesn't always provide the User Acknowledgement service; and (3) a transaction can be aborted without the responder user being notified. Based on the modelling and analysis, changes to WTP have been recommended to the WAP ForumSM.