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Wireless sensor networks (WSNs) have received more and more attention on the object tracking system, but the performance of active routing is low. In this paper,we present an novel energy efficient dynamic target tracking (EE-DTT) protocol for wireless sensor network, EE-DTT has three obvious features: firstly, it improves virtual grid ideas to divide each cluster into MtimesN square area and select...
Energy efficiency is one of the most important design metrics for wireless sensor networks. As sensor data always have redundancies, compression is introduced for energy savings. However, in some cases, it is unlikely to be wise to trade computation energy for communication savings. In this paper, a novel node-level compression arbitration mechanism is proposed, which is applied to improve compression...
Wireless sensor networks (WSNs) can be used to monitor the interested region using multihop communication. Coverage is a primary metric to evaluate the capacity of monitoring. Connectivity also needs to be guaranteed so that the sink node receives all sensed data for future processing. In this paper, we study the m-coverage and n -connectivity problem under border effects. We consider the scenario...
In wireless sensor networks, data transmission is an essential step for various applications, and an energy efficient data transmission mechanism is needed since the energy resource of WSN is restricted. This paper investigates the coalition-based cooperative data transmission mechanism (CC-DTM), analyzes its entire energy consumption, and finds out the optimal number of sensor nodes needed in the...
A wireless sensor network has potential to monitor stimulus around it. Sensor networks have severe energy constraints, low data rate with high redundancy, and many-to-one flows. Thus, data centric mechanisms that perform in-network aggregation of data are needed. Clustering is one of the data centric mechanisms in which various cluster heads perform in-network aggregation of data. Thus, there is more...
Energy conservation is critical in wireless sensor networks. Conventionally, energy consumption is represented by 1/dalpha, when d is the distance between a TX and a RX, and alpha is the path-loss (generally between 2 and 4 for indoor environments). Such a correlation between the energy consumption of sensor node and the distance between a transmitter and a receiver allows a researcher to develop...
Wireless Sensor Networks (WSN) have been noticed and researched nowadays. These new type of networks have unique characteristics. WSNs have different limitations such as computational power, storage capacity, energy source and etc. The main constraint of wireless sensor networks is energy. The energy source of sensor nodes is limited and not rechargeable. Therefore, optimizing consumption of energy...
In this paper, a new TDMA based wireless sensor network (WSN) for military monitoring is proposed. The most important design considerations of the newly developed sensor network system are energy consumption, delay, scalability and fault tolerance. There are three main parts of the system: time synchronization based on the sink with high range transmitter, SyncHRT; data indicator slot mechanism, DISM;...
Improving the lifetime performance of large-scale sensor networks has been one of the key challenges. In this paper, we propose a strategy of energy efficient protocol in wireless sensor networks (WSNs) based on nonuniform- ring-zone model (abbreviated SEEPNM). SEEPNM is proposed for WSNs deployed for detecting rare events, which require prompt detection and response. The nonuniform-ring-zone model...
In this paper, we present a new contention access method for scalable wireless sensor networks. In these networks, the traffic levels are often variants, particularly in monitoring applications. Sensors do not regularly have much data to send. However, when an event occurs, every sensor in a given area will send its alert to the access point simultaneously. Hence, this network suffers a huge number...
Energy consumption is a major issue in designing protocols for ad hoc wireless networks due to battery constrains. This paper identifies the inefficient elements of expanding ring search protocol and proposes the new blocking expanding ring search approach which demonstrates substantial energy savings without an increase in route discovery latency
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