Stochastic Modeling

Distribution-based traffic
Demonstrates the use of the Traffic block to generate transactions based on multiple districtions
Ethernet Traffic
Generating Ethernet traffic based on traffic profile
Image Traffic
Generate images in the form of a Matrix for processing
SysML
Mapping SysML to a performance analysis model for Model-based System Simulation
Queue
Use of the Queue block to model the buffer management, ingress/egress queues, FIFO and SRAM in FPGAs
Server
Use of the Server block to model time-consumption by system resources. Resources can include hardware, RTOS, middleware, networks and interrupts
SystemResource
Mapping an MPEG use case to SystemResources for performance and power analysis
Quantity-Shared
Modeling consumption of quantity which can be memory addresses, semaphore pool and slots avaialable in a parking garage
Channel
Use of the Channel block to model communication, wireless and interface channels
Using Spreadsheet

Stop_n_Wait_w_Channel

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Channels represent connectivity between two or more inputs and output interfaces.

Channel Modeling

This models demonstrates the use of the Channel SmartBlock in VisualSim to define a complex channel architecture. In this system, a channel is created between a transmitter and a receiver. The transmitter sends a single packet and waits for an acknowledge before sending another packet. If it receives a negative acknowledge across the same channel, then the packet is retransmitted. The channel can be defined using parameters such queue length, delay through the channel, number of channel streams and average packet size.

This Model generates Stop_n_Wait DSs and delays based on the uniform random length of the packets. If the noise is less than (2) in a range from 0 to 100, then a negative acknowledge is generated and retransmitted through the channel. The negative acknowledge is retransmitted through Channel_Complete.