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One of the most challenging goals of many wireless sensor network (WSN) deployments is the reduction of energy consumption to extend system lifetime. This paper considers a novel combination of techniques that address energy savings at the hardware and application levels: wake-up receivers and node-level power management, plus prediction-based data collection. Individually, each technique can achieve...
Our prior work suggested the use of power traces of unresponsive sensor nodes to diagnose the cause of anomalous node silence, but suffers from its limitations in scalability. To address these issues, we propose a new concept of power watermarking, a diagnostic service that actively produces unique power watermarks for each system state of interest so as to convey system information over power measurements...
In this paper, we present the design of a baseband System-On-Chip for tracking applications in the medical environment based on the IEEE 802.15.4 standard which can be used to track patient location in hospitals. It utilizes an ARM Cortex-M1 soft-core, 16 kb of SRAM and a bus architecture based on the AHB-Lite specification. The IEEE 802.15.4 MAC primitives are implemented in a Flash-ROM of 32 kb...
This article presents the hardware software co-optimized implementation of the IEEE 802.15.4 protocol for a Wireless image Sensor Network (WiSN) node SoC. In order to to minimize the power consumption and hardware software implementation cost, a power and cost aware partition scheme is introduced. Then the optimized hardware accelerator is designed and validated with software driver/stack based on...
Energy consumption is one of the most important metrics in wireless sensor networks because of the limited power supply in sensor nodes. Many efforts have been taken to reduce the energy consumption of the hardware, software, communication protocols and applications. Simulation is widely used to evaluate the performance of these new designs. Thus, it is necessary to accurately model the energy consumption...
Nowadays the WSN protocol stack based on ZigBee, such as Z-Stack, has a good performance in many respects. Yet there also exists some problems in ZigBee when applied in simple data acquisition applications with limited resources.This paper designs a more suitable WSN protocol stack named Em-Stack, which is compatible with IEEE 802.15.4. Based on the chip CC2430, Em-Stack adopts several key technologies...
We propose the use of a reconfigurable hardware architecture to reduce the power consumption of small sensor node that has various sensors and wireless communication facilities, that were the result of an adaptive function specialization mechanism. Traditional sensor nodes must have had a powerful and multi functional Micro-Controller Unit (MCU) to satisfy the requirements for processing any kinds...
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