scholarly journals Body posture/activity detection: Path loss characterization for 2.4GHz on-body wireless sensors

2009 ◽  
Author(s):  
A. Guraliuc ◽  
A.A. Serra ◽  
P. Nepa ◽  
G. Manara ◽  
F. Potorti ◽  
...  
Keyword(s):  
Wireless Sensors ◽  
Path Loss ◽  
Body Posture ◽  
Activity Detection

Radio Channel Characteristics of Zigbee Wireless Sensors in Machine Shop for Plant Floor Process Monitoring

2006 ◽  
Author(s):  
Lei Tang ◽  
Kuang-Ching Wang ◽  
Yong Huang ◽  
Fangming Gu
Keyword(s):  
Process Monitoring ◽  
Wireless Sensors ◽  
Radio Channel ◽  
Path Loss ◽  
Error Rates ◽  
Machine Shop ◽  
Radio Communications ◽  
Channel Characteristics ◽  
Channel Measurement ◽  
Plant Floor

Wireless sensors are envisioned to be useful for plant floor process monitoring with unprecedented flexibility and low costs, where data can be relayed via a wireless network formed among the sensors. Factory environments, however, are known harsh for radio communications. For sensor radios engineered with extremely low power and simple circuitry, the sensor radio channel characteristics must be identified for optimal network design and reliability assessment. In this paper, a preliminary radio channel measurement study was performed based on the wireless sensor pairs in normal communication at the 2.4 GHz Industrial, Scientific and Medical (ISM) band to assess the sensor radio channel properties in a university machine workshop. The effect of both stationary and moving (forklift) obstacles on the radio propagation in terms of the received signal power, bit error and packet error rates was studied. The effect of stationary obstacles was further analyzed against a simple path loss model to find the path loss exponent. A spectrum analyzer was also used to capture the noise backgrounds in free space and the machine shop, which shows significantly different radio activities among the investigated scenarios. The proposed channel measurement methodology through directly utilizing the sensor platforms will help future radio channel characterization studies in manufacturing plant floor environments.

scholarly journals Minimizing Path Loss in Medical Wireless Sensors in Wireless Body Area Sensor Networks

2017 ◽  
Vol 10 (32) ◽  
pp. 1-7 ◽  
Author(s):  
Rahat Ali Khan ◽  
Altaf Mazhar Soomro ◽  
Hima Zafar ◽  
◽  
◽  
...  
Keyword(s):  
Sensor Networks ◽  
Wireless Sensors ◽  
Path Loss ◽  
Body Area ◽  
Body Area Sensor Networks ◽  
Minimizing Path

scholarly journals Solutions and Recent Challenges Related to Energy in Wireless Body Area Networks with Integrated Technologies: Applications and Perspectives

2020 ◽  
Vol 17 (1(Suppl.)) ◽  
pp. 0378
Author(s):  
Yousra abdul alsahib S.aldeen ◽  
Kashif Naseer Qureshi
Keyword(s):  
Routing Protocols ◽  
Energy Efficient ◽  
Wireless Sensors ◽  
Path Loss ◽  
Body Area Networks ◽  
Wireless Body Area Networks ◽  
Base Station ◽  
Body Area ◽  
Energy Efficient Routing ◽  
Wireless Environment

          In this paper, we have investigated some of the most recent energy efficient routing protocols for wireless body area networks. This technology has seen advancements in recent times where wireless sensors are injected in the human body to sense and measure body parameters like temperature, heartbeat and glucose level. These tiny wireless sensors gather body data information and send it over a wireless network to the base station. The data measurements are examined by the doctor or   physician and the suitable cure is suggested. The whole communication is done through routing protocols in a network environment. Routing protocol consumes energy while helping non-stop communication in a wireless environment. Because of the very tiny size, energy consumption matters a lot. We have focused on the protocols, which provide energy efficiency and improve network lifetime, through put and minimal path loss. We will be discussing some of the most recent energy efficient routing protocols in this paper; later their comparison with an appropriate table is presented. In addition, recent challenges, possible application and perspectives are discussed.   

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