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Wireless sensor networks deployed in industrial monitoring applications are required to gather information about multiple types of data (multi-dimensional) related to the environment. The primary challenge that any WSN presents is energy and latency optimization. Hence, for query resolution about a particular data push and pull methods must be efficiently employed. The A-MDMRA model stores data in...
We investigate the performance of a wireless sensor network composed of a number of IEEE 802.15.4 clusters interconnected in a linear structure. To equalize node lifetime, we utilize randomized sleep at the individual node level and rotation of the bridge role among the nodes located in shared areas between the clusters. Our Markov chain analysis indicates that the proposed mechanism is capable of...
This paper proposes an improvement for beacon enabled IEEE 802.15.4 medium access control (MAC) protocol for better energy consumption, reliability and synchronization among the sensors. First, we suggest an improved model over the existing beacon enabled IEEE 802.15.4. The modified IEEE 802.15.4 MAC protocol is modeled through a Markov chain using retry limits, acknowledgements and a new parameter...
One of the major sources of energy waste in a Wireless Sensor Network (WSN) is idle listening, i.e., the cost of actively listening for potential packets. This paper focuses on reducing the idle-listening time via a dynamic duty cycling technique which aims at optimizing the sleep interval between consecutive wakeups. We considered dual low power listening (DLPL) WSNs, in which the sender waits a...
Several secure data aggregation (SDA) schemes are proposed in literature to reduce energy consumption for cryptographic operations and minimize their impact on the sensor network lifetime. Comparisons of SDA schemes focus primarily on the number of cryptographic operations used and number of bits transmitted in a given scenario. In reality, however, a sensor node operation is more complex: significant...
In this paper, an energy efficient adaptive modulation scheme is proposed for a wireless cognitive radio ad hoc network, where each node is equipped with cognitive radio and the network is an OFDMA system operating on time slots. In each slot, the users with new traffic demand will sense the spectrum and locate the available subcarrier set. Then they choose subcarriers with favorable channel condition...
Sink mobility has become an increasingly important requirement of various sensor network applications. Handling such mobile sink conditions brings new challenges to large-scale sensor networking. This investigation proposed a hybrid-structure routing protocol (HSRP) that combines the benefits of grid-based and cluster-based structures. Grid-based structure is designed to solve the cluster head selection...
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