How to Implement and Evaluate Mobility Pattern in OPNET Alexander Klein
How to Implement and Evaluate Mobility Pattern in OPNET Alexander Klein EADS Innovation Works / University of Wuerzburg [email protected] http:\www3.informatik.uniwuerzburg.de\staff\klein Agenda OPNET Modeler Agenda OPNET Modeler Mobility Pattern Mobility in OPNET Evaluation Implementation Mobility Pattern Evaluation Mobility Pattern Implementation Conclusion Conclusion OPNET Modeler Network Simulator Event-Based Commercial Agenda OPNET Modeler Mobility Pattern Evaluation Implementation Conclusion OPNET Modeler Network Level Node Level Process Level Agenda OPNET Modeler Mobility Pattern Evaluation Implementation Conclusion • Topology • Links • Nodes • Trajectories • Traffic Profiles C-Level Interaction of protocol layers OPNET Modeler Strengths: Weakness: Large library Physical Layer GUI Result gathering Debug Result visualization Support Modular Concept Other popular network simulation tools: NS-2 OMNET++ Agenda OPNET Modeler Mobility Pattern Evaluation Implementation Conclusion Mobility - OPNET Mobility Types: Position: – Direct – Latitude – Trajectory – Longitude – Vector – Altitude – Cosimulation Agenda OPNET Modeler Mobility Pattern Evaluation Implementation Conclusion Mobile Objects: Orientation: – Subnet – Yaw – Node – Pitch – Roll Mobility - Trajectory List of trajectory entries – Position – Orientation – Simulation time Agenda OPNET Modeler Mobility Pattern Evaluation Implementation Interpolation between two points Conclusion Mobility - Trajectory Agenda OPNET Modeler Mobility Pattern Evaluation Implementation Conclusion Mobility - Vector Bearing Agenda Ground speed OPNET Modeler Ascent rate Mobility Pattern Evaluation Bearing Angle Implementation Conclusion Mobility - Cosimulation Matlab Engine Library Agenda OPNET Modeler Mobility Pattern Evaluation HLA Implementation Conclusion Mobility Pattern – OPNET Library Agenda OPNET Modeler Mobility Pattern Evaluation Implementation Conclusion Mobility Pattern – Random Waypoint Algorithm 4. Node waits a certain amount of time Agenda OPNET Modeler Mobility Pattern 3. Node moves towards the new position 1 . Node chooses a random position Evaluation Implementation Conclusion 2. Node selects a uniform distributed movement speed Scenario Boundary Mobile Node 5. Node selects new destination Mobility Pattern – Random Direction 3. Node waits a certain amount of time Algorithm Agenda OPNET Modeler Mobility Pattern 2. Node moves until it reaches the boarder of the scenario Evaluation Implementation Conclusion 1. Node selects a uniform direction and speed Scenario Boundary Mobile Node 4. Node selects a uniform direction and speed Mobility Pattern – Random Walk Algorithm 3.Node waits a certain amount of time 2. Node moves in that direction for a specified amount of time Agenda OPNET Modeler 4. Node selects a uniform direction and speed Mobile Node Evaluation Implementation Conclusion 1. Node selects a uniform direction and speed Scenario Boundary Mobility Pattern Mobility Pattern - Evaluation Visualization – Movement (Debugging) – Density – Histograms (Speed) Agenda OPNET Modeler Mobility Pattern Evaluation Implementation Simulation – Area (Square, Rectangle, Torus, …) – Long-term simulation Conclusion Mobility Pattern – Evaluation Random Waypoint Random Direction Agenda OPNET Modeler Mobility Pattern Evaluation Implementation Conclusion Random Walk OPNET – Random Waypoint Mobility Pattern – Evaluation – Node Density Random Waypoint Random Direction Agenda OPNET Modeler Mobility Pattern Evaluation Implementation Conclusion Random Walk OPNET – Random Waypoint Mobility Pattern – Speed Histogram Random Waypoint Random Direction Agenda OPNET Modeler Mobility Pattern Evaluation Implementation Conclusion Random Walk OPNET – Random Waypoint Mobility Pattern – Evaluation - Area Random Waypoint Agenda OPNET Modeler Mobility Pattern Evaluation Random Direction Implementation Conclusion Random Walk Mobility Pattern – Implementation Centralized Mobility Management Agenda OPNET Modeler Mobility Pattern Evaluation Implementation Mobility Management Advantage: Disadvantage: Group mobility models No individual movement Group statistics Difficult to implement Fast reconfiguration No modification of other models needed Conclusion Mobility Pattern – Implementation Decentralized Mobility Management Agenda OPNET Modeler Mobility Pattern Evaluation Implementation Conclusion Advantage: Disadvantage: Individual configuration Group statistics Individual statistics Slight modification of Simple to implement existing models needed (process model, attributes) Mobility Pattern – OPNET - Implementation Vector based movement: Frequent position updates Faster simulation Simplifies the implementation (move and stop phase) Agenda OPNET Modeler Mobility Pattern Evaluation Implementation Conclusion Implementation: Add a process model to the node model Promote its attributes Divide the movement into move and stop phases Conclusion Implement your own mobility model (or use at least OPNET Modeler 14.0) Visualize the movement to verify your model Agenda OPNET Modeler Mobility Pattern Evaluation Implementation Consider the characteristics of the mobility model – Transient phase – Stability – Node density – Correlated movement – Impact of simulation area Conclusion Questions
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