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Analysing the WAP Class 2 Wireless Transaction Protocol using Coloured Petri Nets

By Steven Gordon and Jonathan Billington


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 Forum $M

Year: 2000
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