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In the past few years, the Internet of Things is driving the need for extending the Internet to constrained devices, including sensors and actuators. The IPv6 Routing Protocol for Low power and lossy networks (RPL) is appearing as an emerging IETF standard especially tailored for Low Power Area Networks (6LoWPAN). RPL constructs a Directed Acyclic Graph (DAG) according to an objective function that...
Localized topology control is attractive for generating reduced topologies with desirable features such as sparser connectivity and reduced transmit powers. In this paper, we propose an energy efficient localized topology control algorithm called X-LMST in order to achieve prolonged network lifetime. In X-LMST, each node is required to keep its one-hop neighborhood topology. Moreover, in X-LMST, a...
Practical experience reveals the characteristic properties of Wireless Body Area Networks (WBANs), signifying the need for a well-designed communication protocol. High mobility, stringent resource constraints, and low and time-variant quality of wireless links are some of the challenging issues in WBANs. Typical applications further have varying Quality-of-Service requirements and demand reliable...
Legacy utility meters for electricity, water and gas are rapidly being replaced by highly automated and networked smart meters. The network of smart meters, collector devices and head-end systems constitute an Advanced Metering Infrastructure (AMI). The purpose of deploying an AMI is to increase the granularity of utility consumption data for demand-response applications. A data routing protocol is...
A typical Wireless Sensor Network (WSN) assumes a homogeneous set of nodes in terms of capabilities. However, this kind of network suffer from poor fundamental limits of latency during the data communication. Another model of WSN assumes a heterogeneous set of nodes with different capabilities (especially in terms of communication range and energy reserves) called Heterogeneous Sensor Networks (HSNs)...
Indoor Wireless sensor networks require a highly dynamic, adaptive routing scheme to deal with the high rate of topology changes due to fading of indoor wireless channels. Besides that, energy consumption rate needs to be consistently distributed among sensor nodes and efficient utilization of battery power is essential. If only the link reliability metric is considered in the routing scheme, it may...
The article proposes HybridLQI to improve the performance of MultihopLQI in the asymmetrical wireless links sensor networks. Every node can maintain the number of messages it sends to each of its neighbours and how many of them are acknowledged, the packet loss percentage over the links can be calculated. Link Quality Indicator (LQI) is used to estimate the downlink channel. Therefore, without adding...
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