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Use of two or more fault injection tools in a test campaign enriches the scenario obtained from a test execution. Faultloads represent the main input for these tools but their specification mechanisms lack usability and expressiveness. This paper presents a full test scenario featuring the use of jFaultload, which applies Java for the specification of fault-loads and translates them to specific formats...
We consider a cooperative wireless network, and exploit node cooperation for achieving physical layer based security. The case of one source, multiple cooperating nodes and one eavesdropper is considered. Two different cooperation schemes are considered. In the first scheme, cooperating nodes transmit a weighted version of the source signal in a decode and forward fashion (DF). In the second scheme,...
The multihop spatial reuse Aloha (MSR-Aloha) protocol was recently introduced by Baccelli et aL, where each transmitter selects the receiver among its feasible next hops that maximizes the forward progress of the head of line packet towards its final destination. They identify the optimal medium access probability (MAP) that maximizes the spatial density of progress, defined as the product of the...
Cooperative retransmission (CR) for cellular uplink employs recovery epochs where colliding packets are retransmitted until all packets are recoverable by the base station. We consider a general class of queueing dynamics, appropriate for cellular uplink MAC protocols, where time slots are grouped into epochs, and each epoch results in some subset of the active nodes completing a transmission to the...
Cognitive radios permit dynamic control of physical layer resources such as transmission power and constellation size; these degrees of freedom can be employed to achieve significant improvements in network throughput above that obtainable using conventional radios (with fixed transmission power and constellation size). In this paper we present a unified framework for coordinated resource allocation...
The broadcast capacity of a wireless sensor network (WSN) is defined as the maximum rate at which the network may generate messages intended for distribution to the entire network subject to coverage and delay constraints. Broadcast capacity depends on factors such as topology, collisions, node failures and queueing delays that may be incurred during heavy load conditions. In our previous work, we...
We propose a novel framework for analyzing the dynamic performance of a gossip protocol on a graph through the use of copulas. Copulas are a statistical technique that express the joint distribution of a set of random variables as a function of their marginal distributions. Using a version of gossip appropriate for wireless networks, we model the system dynamics through equations expressed in terms...
In communication centric application domains flexible interfaces are required to support the variety of recently emerged and still evolving high-speed serial interconnect standards. To develop such interfaces, typical application scenarios have to be identified, and common functionality and specific characteristics of the selected standards need to be analyzed. The results of this analysis can then...
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