Tài liệu 7OPNET Creating Process Model docx

.Creating Process Model

• Purpose:

–Using the Process Editor to create a modified version of the sink process model.

–Adding a new statistic to compute ETE delay.

• Overview:

1. Create modified sink process model to compute ETE delay.

2. When there is a packet arrival, get the packet, obtain the creation time, write out its ETE

delay as a global statistic and destroy the packet.

3. Incorporate new sink process model into existing node model.

4. Create ETE delay statistic probe.

4. Run simulation for a duration of 2,000 seconds to ensure convergence.

5. Filter the “View Results” graphs to answer questions.

Step 1: Creating a new process model

1) Select: File / New / Process Model.

2) Left-click on the “Create State” button and place 3 “states” on the workspace.

3) Left-click on the “Create Transition” button. Starting at “st_1”, connect “st_1” to “st_2”.

4) Starting at “st_2”, create a transition to “st_3”.

Note: Left-clicking while drawing a transition will add vertices to your transition. When you

reach the next state (in this case “st_3”), left click again and the transition will have a curved

shape if you haven’t drawn a straight line.

5) Starting at “st_3”, create a transition back to “st_2”.

6) Right-click on each state and set the following attributes:

st_1: name = INIT status = forced

st_2: name = ETE_Destroy status = forced

st_3: name = WAIT

7) Right-click on the transition going from the “WAIT” state to the “ETE_destroy” state. Set