关键词: 赋时分层着色Petri网 交换式以太网 性能评价

Abstract:

An adequate analytical model of Ethernet response time contains the characteristics of concurrency, dynamics, conflict, real-timeness. Traditional mod  eling methods have some defects, such as complicatedness, rigidity, inflexibility and time-freeness. The hierarchical timed colored Petri net （HTCPN）   models allow the representation of interaction within the real-time client-server systems by adding some new modeling elements, such as request node, s  ervice node, coordination node,and multiple instances node. The hierarchical net usage allows a convenient representation of the arbitrarily given struc   ture of LAN. Two models are established based on HTCPN. It comes to a conclusion that HTCPN is suitable for simulating and imitating this question by an     alyzing the response time.

Key words: hierarchieal timed colored Petri net, switch Ethernet, performanee evaluation