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We propose a probabilistic model based on stochastic geometry to analyze cognitive radio in a mobile ad hoc network using carrier sensing multiple access. Analytical results are derived on the impact of the interaction between primary and secondary users on their medium access probability, coverage probability and throughput. These results give insight on the guarantees which can be offered to primary...
This paper considers the performance of the CSMA protocol with joint transmitter-receiver sensing in a wireless mobile ad hoc network. In our network model, packets belonging to specific transmitters arrive randomly in space and time according to a 3-D Poisson point process, and are then transmitted to their intended destinations using a fully-distributed CSMA MAC protocol. A packet transmission is...
The availability of secret keys is a precondition for the use of many security solutions and protocols. However, securely assigning such keys to nodes is a challenging task in the context of wireless sensor networks. In this paper we present a novel solution for a secure key assignment in wireless sensor networks that can be used during the initial configuration of nodes or for an ad-hoc key assignment...
The recent advance in the intelligent transportation system (ITS) has led the FCC to allocate 7 channels at 5.9 GHz band for wireless access for vehicular environments (WAVE) systems. The key challenge of multi-channel access in vehicular ad-hoc networks (VANET) is to cope with the dynamic channel condition due to highly mobile nodes, while providing fair spectrum share among nodes. In this paper,...
InVeTraS (intelligent vehicular transportation system) is proposed as a vehicle-to-vehicle (V2V) anti-collision mechanism that determines, estimates and absolves collision courses between two or more vehicles based on a correlative and cooperative wireless networking concept. The problem of collision avoidance is abstracted to the generic problem of location awareness and subsequent periodic information...
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