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Orthogonal Frequency Division Multiplexing (OFDM) is a advance bandwidth efficient digital modulation technique highly adopted for the broadband wireless services because it gives high performance in the multipath fading environments. It is very robust against narrowband interference, but it is not totally free from drawbacks. There are timing and frequency synchronization error for which this technique...
Internet protocol architecture is totally based on layered approach. However, layer independence may lead to nonoptimal performance in wireless systems. In fact, many assumptions for the wired networks are not applicable to wireless environments. For example, all the losses in the wireless channel are not due to congestion, where packets can be lost due to the link failure. In this paper, we compare...
In wireless mesh networks, with the standard Optimized Link State Routing (OLSR) metric (i.e. hop count), traffic is routed on the shortest path without considering factors such as traffic distribution and link capacities. Consequently, some nodes may get overloaded from the uneven utilization of network resources. OLSR can be modified to use other link cost metrics, with route selection based on...
The current status of a campus research testbed that is being constructed to allow for the exploration of digital service delivery and smart networked environments using different networking technologies is presented.
Traditional approaches for testing MANET protocols and applications prior to field experimentation often involve simulation tools or small-sized physical testbeds. However, simulation tools typically do not run in real-time and rely on simplified models rather than a real system, while physical testbeds are prohibitively expensive to build and operate. A more practical method is to use emulation tools...
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