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The vehicle-to-vehicle (V2V) data transmissions in Vehicular Ad-hoc Networks (VANETs) have been applied in many areas including the Internet of Vehicles, mobile data offloading, and mobile crowdsensing. The V2V-based data delivery that is opposite to the direction of a vehicle is called a backward delivery against the traffic flow, and it is blocked by an existing problem: a traffic hole. Under the...
In this paper, for secure routing optimization we are introducing dynamic trust management protocol in information centric network and delay tolerant network (DTN) environments. In the existing system, dynamic trust management for DTN is used to deal with the detection of the selfish, malicious misbehaving nodes and genuine loss nodes. To disrupt DTN operations, malicious nodes performing trust-related...
This paper considers a network in which a primary user (PU) may cooperate with a cognitive radio (CR) user for transmission of its data packets. The PU is assumed to be a buffered terminal operating in a time-slotted fashion. We develop an energy-efficient protocol that involves cooperation and coordination between primary and secondary users. To satisfy certain quality-of-service requirements, users...
How to adjust parameters to adapt to the dynamic network conditions is a main problem in wireless communications. There are not any effective methods to deal with this problem, especially in non-saturation conditions. By analyzing feedback signal of channel, we introduce a linear adjustment rules of CW about idle slot intervals of channel, which can be used in non-saturation conditions. And then,...
In cognitive radio networks, unlicensed users can use under-utilized licensed spectrum to achieve substantial performance improvement. To avoid interference with licensed users, unlicensed users must vacate the spectrum when it is accessed by licensed (primary) users. Since it takes some time for unlicensed users to switch to other available channels, the ongoing data transmissions may have to be...
Robust flow controller design problem for data-communication networks with multiple uncertain time-delays is considered. A recent result on the validity of the small gain theorem for systems with non-causal subsystems is first extended for application to this problem. Then, using this extension, a robust flow controller design approach is proposed. Simulations are performed to illustrate the performance...
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