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To access the contents, click the chapter and section titles.
Wireless Networking Handbook
Verifying the Design Through Physical PrototypingConstruction and testing of the part of the system you want to verify is known as physical prototyping. It uses the actual hardware and software you might eventually deploy. In some cases, you could include the prototype as part of the initial implementation, perhaps as a system pilot. The prototyping can also take place in a laboratory setting or testbed. The following are the main attributes of physical prototyping:
Typically, you do not need to physically prototype the entire system, especially those parts that other organizations have implemented without encountering problems. Consider prototyping any solutions that have not been tested before. The following are some examples:
Verifying the Design through SimulationSimulation is software that artificially represents the networks hardware, software, traffic flows, and utilization as a software model. A simulation model consists of a software program written in a simulation language. You can run the simulations and check results quickly, greatly compressing time by representing days of network activity in minutes of simulation runtime. The following are the main attributes of using simulation for verifying the design:
For most implementations, you do not need to run simulations. Consider using simulation for the following situations:
There are simulation tools on the market that can assist designers in developing a simulation model. Most simulation tools represent the network using a combination of processing elements, transfer devices, and storage devices. Mil 3s OpnetMil 3s Opnet simulator has evolved as a response to the problems resulting from network complexity. Structured around a top-down, graphical hierarchy of representation that uses the latest software technology, nodes are represented as objects that communicate through data-flow networks and can be quickly customized to specific details. The entire system, including statistical analysis of network traffic, is portrayed through an X Window graphical user interface. As a result, the designer can think in terms of basic architectures and explore the consequences without coding a design from the bottom up. Opnet is structured as a series of hierarchical graphical editors that address each level of network design. Consisting of three levels, the highest tier is based on connectivity, operating as a schematic-capture function. Graphical representations of a network can be superimposed on backgrounds representing floor plans or geographic areas. The second level, the node editor, captures node activity in terms of data-flow analysis of hardware and software subsystems. The third level contains a process editor that defines the control flow, such as a protocol or algorithm.
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