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In this work, we use a new technique called tagged user approach (TUA) to analyze the performance of S-Aloha MAC protocol for CR users widely used in wireless communication. This new technique assumes that the channel is symmetric so that statistical equilibrium exists for all users. By adding two more realistic assumptions, we analyze the stability of the random chosen user and after extrapolate...
In our previous work, a simulation framework was proposed to focus on imitating the behavior of wireless charging vehicles (WCVs) and wireless sensor networks (WSNs) because current mainstream simulators have very limited support on simulation of WCVs. The WCV is an integration of a mobile vehicle and a wireless power transfer broadcaster, which is used to recharge sensors wirelessly to prolong the...
In disaster situations, the coordination of rescue missions is a difficult task. The person in charge makes decisions under pressure, which could lead to inappropriate instructions to rescuers and could cost many lives. The aim of DisVis 2.0 approach is to release pressure from those responsible by providing decision support using predictive human-centric disaster simulations for infrastructure-less...
Various networking applications and systems must be tested before the final deployment. Many of the tests are performed on network testbeds such as Emulab, PlanetLab, etc. These testbeds are large in scale and organize devices in relatively fixed ways. It is difficult for them to incorporate the latest personalized devices, such as smart watches, smart glasses and other emerging gadgets, so they tend...
A number of geolocation-based DTN (Delay Tolerant Networking) routing protocols have been shown to perform well in selected simulation and mobility scenarios. However, the suitability of these mechanisms for widely-available inexpensive GPS hardware has not been evaluated. In this brief paper we evaluate the effect of GPS positional error on our own and previously existing geographic routing protocols.
Reliable communications are crucial for the success of emergency response and management. However, today's technologies used by rescuers and civilians mainly rely on either centralized or specialized emergency approaches, which reveal individual issues especially in infrastructure- less emergency situations (e.g., blackout). In this paper, we present a customary home router upgraded as self- sustaining...
In this paper, we investigate the effect of which different pricing algorithms have on a flexible optical choice-based network. Our pricing algorithms attempts to perform proactive collaborative optimization by offering some network service choice, as more attractive than others, and thus encourage users to buy services that are in surplus instead of those which use resources that are viewed more...
IEEE 802.15.4e network aims at providing highly reliable communication links via time slotted channel hopping (TSCH) technology for lossy wireless channels. In such network, all nodes remain synchronized via message exchange periodically to compensate for the clock drift. In this paper, we derive theoretical average time for a node to remain in synchronized status with its parent node under the noisy...
We propose an optimal Physical Layer Convergence Procedure Protocol Data Unit (PPDU) duration algorithm that divides a long data stream into two portions among consecutive groups based on the average PPDU duration of the Very High Throughput (VHT) group. The proposed solution considers all Wireless Local Area Network (WLAN) parameters and satisfies requirements of the VHT Multi-User Multiple Input...
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