RTNS version 1.0 has been released and contains basic mechanisms for distributed Image Processing.
Introduction:
Simulation is an important analysis tool in the development
of distributed systems, in testing new network
protocols, and for assessing the performance of protocols.
In many important cases, simulation complements
effectively off-line mathematical analysis tools,
especially for large and complex systems with hundreds
of nodes.
Existing simulation tools for wireless networks concentrate on the communication protocols and radio propagation models.
Most of these tools provide models for calculating the power utilization for the radio and the node hardware. However, they lack
capability of cpu models and cannot simulate the processor level.
The Real Time Network Simulator (RTNS) is a simulation suite to model operating system mechanisms for distributed networked applications. It is built by integrating the popular NS-2 (Network Simulator) and RTSim (Real Time Operating System SIMulator). The latter is an open source project developed at Retis Lab, which provides real time, power aware simulations at the
CPU level.
RTNS bridges the gap between the network and operating system simulators.
This cosimulator could be used for studying the effect of CPU load on delay in recieving of packet in a communication network.
In wireless networks, the packet transmitted in a network has to pass through a number of processors before being received at the destination node.
Adopting a flat FCFS scheduling policy at each hop, as the load on the processor increases due to different activities performed by the corresponding node (e.g. if the node is also involved in computation), the delay in transmission and reception of packet increases.
Hence this delay induced by the processor load is quite significant for time critical applications over the network.
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The RETIS Lab |
© Paolo Pagano, Mangesh Chitnis, Prashant Batra, Francesco Piga, Giuseppe Lipari |
