Network Simulation by Richard M. Fujimoto, George Riley, Kalyan Perumalla PDF

By Richard M. Fujimoto, George Riley, Kalyan Perumalla

ISBN-10: 1598291106

ISBN-13: 9781598291100

An in depth creation to the layout, implementation, and use of community simulation instruments is gifted. the necessities and concerns confronted within the layout of simulators for stressed out and instant networks are mentioned. Abstractions reminiscent of packet- and fluid-level community types are lined. numerous current simulations are given as examples, with information and rationales concerning layout judgements awarded. matters concerning functionality and scalability are mentioned intimately, describing how you can make the most of allotted simulation tips on how to elevate the size and function of a simulation surroundings. ultimately, a case learn of 2 simulation instruments is gifted which have been constructed utilizing allotted simulation strategies. this article is key to any pupil, researcher, or community architect needing an in depth figuring out of ways community simulation instruments are designed, applied, and used.

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Processing an event means zero or more state variables within the LP may be modified, and the LP may schedule additional events for itself or other LPs. cls December 6, 2006 15:35 PERFORMANCE, SCALABILITY, AND PARALLEL MODEL EXECUTION 43 that indicates the timestamp of the most recent event processed by the LP. Any event scheduled by an LP must have a timestamp at least as large as the LP’s simulation time clock when the event was scheduled. As noted earlier, the synchronization algorithm must ensure that each LP processes events in timestamp order.

How does the LP know it will not later receive an event from another LP with timestamp less than 100? This question captures the essence of the synchronization problem. Synchronization algorithms can be broadly classified as either conservative or optimistic. , the execution mechanism avoids synchronization errors. In the aforementioned example where the next unprocessed event has a timestamp of 100, the LP must first ensure that it will not later receive any additional events with timestamp less than 100 before it can process this event.

This type of random distribution accounts for the clustering of nodes near the center of the region, by design. The figure shows that we are modeling two nodes transmitting packets at the same time. Each transmitter is shown as a cyan square, and has several neighbor nodes that are receiving the transmission correctly (shown as green squares). In this example, the packet is actually addressed to a single recipient, which is indicated by a blue square in the figure. There are a small number of receiving nodes shown in yellow, indicating that a node is aware that a packet is being transmitted, but the signal strength is too weak to properly detect the signal.

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Network Simulation by Richard M. Fujimoto, George Riley, Kalyan Perumalla


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