Modeling with enhanced prioritized Petri nets: EP-nets

✍ Scribed by Sheng-Uei Guan; Sok-Seng Lim

• Book ID: 104273838
• Publisher: Elsevier Science
• Year: 2002
• Tongue: English
• Weight: 496 KB
• Volume: 25
• Category: Article
• ISSN: 0140-3664
• DOI: 10.1016/s0140-3664(01)00401-7

✦ Synopsis

Recently, many researchers have their attention focused on interactive temporal models, like the extended ®nite state machines or the extended Petri net models. One of the recent mechanisms proposed for synchronization is known as the prioritized Petri net, P-Net, which is implemented in the distributed object composition Petri net (DOCPN). The development of DOCPN has achieved media synchronization in distributed multimedia environments. This P-Net mechanism holds a powerful property: if the deadline is due, it forces ®ring events regardless whether they are ready or not. A side effect might occur, which is known as premature/late arriving tokens (PLATs). This paper addresses the key issue of providing ¯exible multimedia presentation with user interaction and suggests improved P-Net models, which handles PLATs, accommodates dynamic event mechanisms and can specify user interactions in real time during presentation. To demonstrate the concepts are feasible, a prototype with runtime support has been developed and used to construct several interactive multimedia applications, including skip, freezeand restart, reverse, speed scaling, and multicasting.