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Wireless Networked Control Systems (WNCSs) require a special attention on communication protocols used to exchange time-constrained messages. The native IEEE 802.15.4 standard does not implement mechanisms capable to control the service offered by network. This paper proposes a solution enabling to prioritize the messages based on the blackburst mechanism. An analytic study on worst-case response...
In this paper, we propose a game theoretic framework for a new approach for MAC design with prioritized event reporting in sensor networks. The MAC priority classes are adaptively assigned based on accuracy of location information for individual sensor nodes, and on data correlation structure. We show that for the proposed MAC solution, the event reporting results in more accurate and faster localization...
We consider transmission scheduling by medium access control (MAC) protocols for energy limited wireless sensor networks (WSN) in order to maximize the network lifetime. Time-varying opportunistic protocol (TOP) for maximizing the network lifetime is proposed. By executing TOP each sensor exploits local channel state information (CSI) and local residual energy information (REI). TOP implements opportunistic...
In a wireless sensor network (WSN), interesting events are reported to the sink by the sensors in a distributed manner. Applications running at the sink require certain reliability in terms of events per unit time to be able to run satisfactorily. Individual report from sensor nodes is not important, but collective reports from sensor nodes of a region of interest of an application are crucial. Thus,...
The IEEE 802.15.4 standard is uniquely designed to meet the requirements of the low data-rate, low power-consumption applications in the low rate wireless personal areas network (LR-WPAN) with a focus on enabling wireless sensor network applications. Recently, analytical modelling of IEEE 802.15.4 contention-based Medium Access Control (MAC) protocol has received significant research efforts. However,...
The communications are interrupted by the hidden terminals in the traditional MAC protocols when the nodes?? power is asymmetric in WSN networks. On the basis of S-MAC the improved protocol is proposed. Node judges whether the power asymmetric nodes are occurred in the vicinity of it according to the link state with neighborhood nodes. Then neighborhood nodes broadcast bandwidth reservation (BRES)...
Wireless sensor networks (WSNs) find applications in remotely monitoring and tracking many objects. These networks are battery driven and hence a major constrain in a WSN is its low energy. One of the factors that reduce the energy efficiency is collision. In WSNs, the density of transmission for packets through the medium is often very high and as a result the traffic flow would be increased. These...
Energy efficiency is a primordial issue in the wireless sensor networks. This is achieved by deactivating nodes when possible. In this paper we describe the MAC protocol MaCARI that synchronizes nodes in order to schedule active and inactive periods. MaCARI divides time into three periods: a synchronization period, a scheduled activities period where communications are constrained by a tree and an...
This paper analyzes the performance of a MAC scheme for low-rate wireless sensor networks that makes use of distributed queues to improve radio channel utilization. Analytical values first for the throughput performance, and later for the energy consumption are derived as a function of the system parameters. The obtained results show that the proposed scheme outperforms IEEE 802.15.4 MAC in terms...
Major concern of energy constrained WSN technology is to design energy efficiency and low latency communication protocol, multilayer clustering the whole system nodes is an efficient solution to prolong network lifetime and decrease system latency to the event. By using the layer rotation, all nodes energy has been sufficiently used. In the simulation, our proposed protocol shows better energy efficiency...
Designing low energy consumption, high efficiency media access control (MAC) protocols are one of the most important directions in wireless sensor networks (WSN). In this paper, we proposed a new contention reserve MAC protocol, named CRMAC, under the inspiration of IEEE 802.15.4's superframe structure. CRMAC is a MAC protocol suitable for intra-cluster WSN that combines the advantages of contention...
FrameComm is a contention based, duty cycled, MAC protocol that ensures a message will be transmitted during the receiverpsilas listen phase by sending a packet, followed by a short gap, repeatedly for a precalculated number of times or until an acknowledgment is received. While introducing duty cycled communications can yield large power savings it does so at the cost of increased delay and decreased...
Wireless sensor networks, applied for monitoring physical environments, have recently emerged as an important application of the ad hoc networks paradigm. Low processing power and wireless connectivity make such networks vulnerable to various types of attacks. The dense deployment of sensors along with the protocol deficiencies, make broadcast attacks feasible. The current solutions for these types...
In this paper, we propose a new medium access control (MAC) protocol for wireless sensor networks for environmental monitoring applications. The proposed MAC scheme is specifically designed for wireless sensor networks which have periodic traffic with different sampling rates. In our protocol design, only sink can start and maintain synchronization and also determine the time schedule for all other...
Wireless sensor networking is an emerging technology that has a wide range of potential applications including environment monitoring. In this paper we present the important parameters which must be taken into account while designing MAC protocol for various wireless sensor nodes (Mica2, Mica2Dot & IMotes) based Sensor Networks.
This paper presents an integrated MAC and routing protocol called Delay Guaranteed Routing and MAC (DGRAM) for delay sensitive wireless sensor network (WSN) applications. DGRAM is a TDMA-based protocol designed to provide deterministic delay guarantee in an energy efficient manner. The design is based on slot reuse to reduce the latency of a node in accessing the medium, while ensuring contention...
This paper presents a general framework for adaptive Energy and QoS Aware (EQoSA) MAC protocol for wireless sensor networks. It is a scheduling based MAC protocol assuming a steady state network behavior. Similar to previous works, the time is divided into rounds and each round starts with a setup phase followed by a number of sessions. Each session starts with a contention window followed by a number...
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