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Most sensor networks employ dynamic routing protocols so that the routing topology can be dynamically optimized with environmental changes. The routing behaviors can be quite complex with increasing network scale and environmental dynamics. Knowledge on the routing path of each packet is certainly a great help in understanding the complex routing behaviors, allowing effective performance diagnosis...
Online power measurement is one of the power measurements in smartphones which would allow us to measure the energy consumption of smartphones without using external devices. This online method depends on a built-in BMU (Battery Monitoring Unit). BMU is a chip which can gather relative data of the battery and submit them to the upper level. The current data which BMUs submit in the past is the average...
A high-energy-efficiency wireless communication link scheme is proposed for portable medical applications with strict resource constraints. The scheme is especially optimized for the application systems with the star-topology master-slave network, i.e., the network formed by a portable data-logger (master) and several sensor nodes (slaves). The proposed scheme eliminates “non-effective” operation...
This paper presents a low-power MCU with remotely-programmable feature which is specifically optimized for implantable medical devices (IMDs). In medical applications the most critical requirements are low-power, energy-efficient, flexible, etc., which are provided by utilizing the techniques such as clock gating, power gating, instruction set improvement, DMA optimizations for data paths. The MCU...
This paper presents an energy-efficient SoC dedicated for portable medical monitoring and intervention systems capable of closed-loop control. The SoC contains a 0.9V/165μW MCU and a dual-band RF block including a 403MHz transceiver for data link and a 915MHz receiver for wake-up link. The data link transceiver is composed of a 200kbps FSK transmitter and a 64kbps OOK receiver, consuming 5.58mW and...
Based on the function character and conductivity of carbon fiber smart layer (CFSL), A novel electrical resistance tomography (ERT) system of CFSL had been developed for whole field structural health monitoring (SHM). The apposite Tikhonov regularization principle and modified Newton-Raphson (MNR) algorithm were adopted to solve the ERT inverse problem. Its effectiveness was evaluated using virtual...
This paper presents an energy-efficient implementation of a real-time on-demand MAC protocol for medical wireless body sensor network (WBSN). Medical WBSN is focused on pervasive healthcare and medical applications, such as monitoring vital signs, making basic drug delivery, etc. The sensor nodes in the heterogeneous WBSN generally require different data rates, due to their differing functions. Additionally,...
This paper proposed to study a Vegetation Index (VI) with surface bi-directional reflectivities in MODIS near-IR and mid-IR channels. Considering the fact that the observations in mid-IR at satellite altitude during daytime consist of a combination of both reflected radiance due to sun irradiance and emitted radiance from both the surface and the atmosphere, a brief description of estimating the land...
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