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Connectivity is one of the most fundamental properties of wireless multi-hop networks. This paper studies the connectivity of large wireless networks with secrecy constraint, i.e. a pair of nodes can communicate securely against eavesdropping. Specifically, we consider a network with a mixture of legitimate nodes and eavesdroppers that are distributed according to two independent Poisson point processes...
In this paper, we present VLSP, a Vehicular Location based Service with Privacy grantees. In VLSP, we assume the service provider is untrusted and users do not have pre-established social relationships with each other, we use standard cryptographic primitives, Broadcast Encryption (BE) and Attribute-based Encryption (ABE) to provide privacy guarantees. By using VLSP, we are able to protect users'...
Wireless Sensor Networks (WSN) are a sensing, computing and communication infrastructure that are able to observe and respond to phenomena in the natural environment and in our physical and cyber infrastructure. The sensors themselves can range from small passive micro sensors to larger scale, controllable weather-sensing platforms. In this work, we investigate how the sensor network performs in the...
Sensor networks are a sensing, computing and communication infrastructure that are able to observe and respond to phenomena in the natural environment and in our physical and cyber infrastructure. The sensors themselves can range from small passive micro-sensors to larger scale, controllable weather-sensing platforms. In this work, we investigate how the sensor network performs in the case when the...
In this paper, we present the implementation and analysis of our implemented testbed considering the optimized link state routing (OLSR) protocol. We investigate the effect of mobility and topology changing in the throughput of a mobile ad-hoc network (MANET). The mobile nodes move toward the destination at a regular speed. When the mobile nodes arrive at the corner, they stop for about three seconds...
Recently, mobile ad-hoc networks (MANET) are continuing to attract the attention for their potential use in several fields. Most of the work has been done in simulation, because a simulator can give a quick and inexpensive understanding of protocols and algorithms. However, experimentation in the real world are very important to verify the simulation results and to revise the models implemented in...
Wireless networks have become increasingly popular and advances in wireless communications and electronics have enabled the development of different kind of networks such as mobile ad-hoc networks (MANETs), wireless sensor networks (WSNs) and wireless sensor-actor networks (WSANs). These networks have different kind of characteristics, therefore new protocols that fit their features should be developed...
Vehicular ad hoc network (VANET), a subclass of mobile ad hoc networks (MANETs), is a promising approach for future intelligent transportation system (ITS). Understanding and modeling packet error in the VANET is especially relevant to the design and analysis of higher layer wireless communication protocols. In this paper, the analysis of the packet error characteristics based on measurements in live...
The energy of the power supply units for wireless sensor network node is finite and the node is uneasy to replace, so the energy consumption is a key problem in wireless sensor network (WSN). There are two solving ways: the one is adding the energy of power resource to increase the lifetime of network, the other is using the low power design technology to enhance the energy efficiency. However, the...
In this paper we present empirical results from a study, examining the effects of environmental diversity on vehicle-to-vehicle link in vehicular ad hoc networks (VANET). And packet loss rate (PLR) and received signal strength indicator (RSSI) of the wireless link are measured. The results of the measurement indicate that environment affects the quality of the wireless link in VANET greatly; the average...
In this work, we consider the behavior of a wireless ad- hoc network under TwoRayGround and Shadowing radio models. By means of simulations, we analyze the performance of three routing protocols: AODV, DSR, and DSDV, and study the global energy depletion inside the network. We found that the energy consumption due to AODV and DSR can be very different with respect to the radio model. In particular,...
In this paper, we consider the behavior of a wireless ad- hoc sensor network for different radio models. By means of simulations, we analyze the performance of three protocols: AODV, DSR, and DSDV considering two radio models Two Ray Ground and Shadowing. In difference with other works, we generalize the type of radio model by allowing the path-loss randomnesses to be present in the service environment...
In this paper, we present a general methodology to assess the performance of an ad-hoc network equipped with a proactive routing protocol, namely the open link state routing protocol. We are interested in identifying the parameters which strongly affect the overall performance. To this aim, and contrary to the common use of computing means and variances only, we use a hypothesis test-based toolkit,...
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