22-11-2012, 04:33 PM
Simulating Well-Known Protocols
1Simulating Well-Known.pdf (Size: 287.06 KB / Downloads: 45)
Why Qualnet?
Rapid prototyping of protocols
Comparative performance evaluation of
alternative protocols at each layer
Built-in measurements on each layer
Modular, layered stack design
Standard API for composition of protocols across
different layers
Scalability via support for parallel execution
GUI Tools for system/protocol modeling
Simulation Parameters
Global Parameters:
Simulation time
Coordinate system and terrain
Random seed
Topology and subnets
Layer/Protocol related parameters:
Channel/Radio
Physical Layer
MAC Layer
Network Layer
Propagation Model
PROPAGATION-LIMIT: received signals with power below
this limit (in dBm) will not be processed.
e.g. PROPAGATION-LIMIT -111.0
PROPAGATION-PATHLOSS: specifies path-loss model
FREE-SPACE
IP Protocol
Currently the only support network layer protocol
Available queuing models
First-in first-out (FIFO)
Variations of Random Early Detection: RED, RIO, WRED,
Three priority types supported: control (0), real-time (1),
and non-real-time (2)
IP-QUEUE-PRIORITY-QUEUE-SIZE specifies the queues
size (in bytes)
Example routing protocol comparison
Comparing throughput of an FTP application over
AODV and DSR reactive routing protocols
Application traffic: one FTP session
Routing protocols: AODV/DSR
Collected statistics: application layer