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Little effort has been made to compare routing protocols according to their resiliency in wireless multi-hop sensor networks in the presence of packet dropping malicious insiders. In this paper, we propose a new taxonomy of routing protocols obtained by applying our resiliency metric. Several resiliency enhancing methods such as introducing a random behavior to the classical routing protocols and...
This poster presents the QoS Oriented Opportunistic Routing (QOR) protocol, a novel opportunistic routing protocol for energy constrained Wireless Sensor Networks. QOR builds a joint routing structure and addressing scheme and proposes a cascading forwarding scheme that guarantees reliable, replication-free data transmissions and collision-free acknowledgements even in presence of long-range asymmetric...
This paper presents the Self Adapting Receiver Initiated MAC protocol (SARI-MAC), a novel asynchronous MAC protocol for energy constrained Wireless Sensor Networks. SARI-MAC self-adapts to the traffic load to meet specified Quality of Service requirements at the lowest energy cost possible. To do so, SARI-MAC relies on traffic estimation, duty-cycle adaptation and acknowledgement mechanisms. Our performance...
For energy constrained wireless sensor networks, lifetime is a critical issue. Several medium access control protocols have been proposed to address this issue, often at the cost of poor network capacity. To address both capacity and energy issues, we propose a novel medium sharing protocol for Wireless Sensor Networks named Cascading Tournament (CT-MAC). CT-MAC is a synchronous, localized, dynamic,...
This paper proposes a mathematical framework to model and analyze the energy consumption of routing protocols in multihop wireless networks such Mobile Ad Hoc Networks (MANETs) or Sensor Networks (WSNs) by taking into account the protocol parameters, the traffic pattern and the network characteristics defined by the medium channel properties, the dynamic topology behavior, the network diameter and...
Numerous localization protocols in Wireless Sensor Networks are based on Received Signal Strength Indicator. Because absolute positioning is not always available, localization based on RSSI is popular. More, no extra hardware is needed unlike solutions based on infra-red or ultrasonic. Moreover, the theory gives a RSSI as a function of distance. However, using RSSI as a distance metric involves errors...
In network protocol engineering resiliency is still a relatively new and somewhat ill-defined concept. Insofar only few studies attempt to define some metric to measure and thus quantify resiliency. In this paper we propose to quantify network resiliency along multiple parameters and further we introduce a two dimensional graphical representation with multiple axes forming an equiangular polygon surface...
To provide for reliability in Wireless Sensor Networks (WSNs), Medium Access Control (MAC) protocols must be adapted by mechanisms taking cross-layer approaches into account. We describe AreaCast which is designed for enhancing reliability in WSNs. AreaCast is a MAC layer mechanism independent of the routing layer, but uses only local topological and routing information to provide a communication...
Energy-efficient communication protocol is a primary design goal for Wireless Sensor Networks (WSNs). Many efforts have been done to save energy: MAC with duty cycle, energy-aware routing protocols, data aggregation schemes, etc. Recently, beacon-less strategies have emerged as new direction to improve considerably the WSN lifetime. However, the main contributions are not suitable to real radio environments...
This paper is focused on broadband wireless mesh networks based on OFDMA resource management, considering a realistic SINR model of the physical layer with a fine tuned power control at each node. A linear programing model using column generation leads to compute power efficient schedules with high network capacity. Correlation between capacity and energy consumption is analyzed as well as the impact...
In this paper, we focus on broadband wireless mesh networks like 3GPP LTE-Advanced. This technology is a key enabler for next generation cellular networks which are about to increase by an order of magnitude the capacity provided to users. Such an objective needs a significative densification of cells which requires an efficient backhauling infrastructure. In many urban areas as well as under-developed...
In this paper, we focus on Wireless Sensor Networks (WSNs) in a more realistic case than classical studies and previous works: we consider wireless sensor nodes having different transmission ranges according to the environment and/or to the wireless chipset. The main consequence of this heterogeneity is the existence of asymmetric links. Such links in a WSN degrade the performance of most protocols...
This paper focuses on the resiliency of wireless sensor network routing protocols against selective forwarding attacks by compromised nodes. To provide for security in such a context cryptographic solutions must be completed by algorithmic solutions considering "beyond cryptography" approaches. Enhancing the routing protocol resiliency to attacks is one approach that merits further investigation...
Since the last ten years, Wireless Sensor Networks (WSNs) attract considerable research interests. The limited energy of sensors, the embedded constraints and the communication restrictions make WSN a very challenging system. Many efforts have been done to propose energy-efficient protocols in WSN through activity scheduling, duty cycling MAC protocols, energy-aware routing protocol, temporal and...
Wireless sensor networks (WSNs) are data centric networks to which data aggregation is a central mechanism. Nodes in such networks are known to be of low complexity and highly constrained in energy. This requires novel distributed algorithms to data aggregation, where accuracy, complexity and energy need to be optimized in the aggregation of the raw data as well as the communication process of the...
Wireless Sensor Networks (WSN) need to be organized in order to be more resource-efficient and scalable. Directed Acyclic Graphs (DAG) are of interest for WSN organization because of their route redundancy to the root. A recent routing protocol for WSNs coming from the IETF ROLL Working Group specifies the use of DAGs and proposes to improve the route redundancy even further by routing through sibling...
The capacity of a multi-hop wireless network is the traffic payload that it can transport. This is a prominent quality of service issue, particularly in the highly constrained settings of 802.11 wireless mesh network. In this paper, we consider two complementary definitions of the capacity. A network-wise capacity is defined as the sum of the upload traffic, and a flow- wise capacity highlighting...
This paper considers security in wireless sensor networks (WSNs), focusing at the routing layer. We propose to analyze the behavior of some routing protocols according to attacks stemming from compromised nodes. Such malicious nodes could disrupt the routing functionality (node replication, Sybil attacks or Black-Grey-Sink holes). For such adversary models traditional cryptographic solutions are not...
This paper focuses on the self-organization of ad hoc and hybrid networks. We propose to organize networks with two integrated virtual structures: a backbone and clusters. The backbone helps to optimize the flooding of control packets, and to offer a natural prolongation of the backbone of wired networks. Clusters help to hierarchize the network, each of which is managed logically by its clusterhead...
The goal of the self-organization is to structure the wireless sensor networks (WSN) using a connected logical topology (backbone) or a non connected one (clusters) in order to introduce stability and robustness. More, networking protocols based on such virtual structures should lead to better performances than the classical flat approach. A lot of studies deal with performance evaluations of virtual...
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