Beijing Credit Top Company Co., Ltd.OPNET Modeler Training (Day 2)2Beijing Credit Top Co. ,Ltd. All rights reservedCourse ContentDAY 1:• Introduction• Modeling Framework• Running The DES• Building a First Network{Lab}• Traffic Modeling• Modeling Applications with the Standard Application Models{Labs}DAY 2:• Events and Event List Concepts• Process Modeling Methodology (PMM) {Lab}• Debugging Techniques {Labs}• Wireless Modeling{Labs}• Modeling Custom Wireless Effects{Labs}DAY 3:• Basic WiMAX Configuration {Labs}• Using WiMAX Models for Planning and Design {Labs}• Using WiMAX Models for Analysis and Testing {Labs}Beijing Credit Top Company Co., Ltd.北京怡嘉行科技有限公司Events and Event List ConceptsAgendaBeijing Credit Top Co. ,Ltd. All rights reserved4• Conceptual Goals–Events–Interrupts–Event-driven simulation–Event list and the simulation time clock–Simulation Kernel–Processes and interruptsEvent-Driven SimulationBeijing Credit Top Co. ,Ltd. All rights reserved5• An event is a request for a particular activity to occur at a certain time.• OPNET simulations are event-driven.Time, in the simulation, advances when an event occurs.• A different method might be to sample at regular intervals. Disadvantages are as follows:–Accuracy of results is limited by the sampling resolution.–Simulation is inefficient if nothing happens for long periods.TimeEvent TypeModule0.0Initializesrc.gen0.0Initializesrc.rte4.3Timer expiressrc.gen4.3Packet arrivessrc.rteHeadBeijing Credit Top Co. ,Ltd. All rights reserved6Event List Concepts• An OPNET simulationmaintains a single global event list.• All objects access a shared simulation time clock.• Events are scheduled on the list in time order. The first event on the list is the head.• An event...
