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The IEEE 802.15.4 as one of the facto low layer communication standards for PANs and WSNs may be interfered by other wireless devices in the ISM frequency bands, especially at home, such as devices of IEEE 802.11b, Bluetooth, Cordless telephone, and microwave oven. This paper examines the mutual interference effects of 2.4 GHz devices which are widely(More)
Using Wireless Sensor Networks (WSNs) in health care system has yielded a tremendous effort in recent years. However, in most of these researches, tasks like sensor data processing, health state decisions making and emergency messages sending are completed by a remote server. Transmitting and handing with a large scale of data from body sensors and home(More)
The purpose of this project is to integrate the technologies of wireless sensor networks and public communication networks to construct a healthcare system for senior citizens at home without interfering their daily activities. This system provides 4 main functionalities, including indoor monitoring, outdoor monitoring, activity and health state decision,(More)
Wireless sensor networks provide distributed sensing and processing to a wide range of applications that operate in different environments. To be able to perform their intended duties, one of which is relaying information to other nodes in the network, a routing protocol is needed. One possible building block in a routing algorithm is to use a flooding(More)
In this paper, we will describe the implementation and experimental analysis of a wireless sensor network application for e-Health. The main idea of the application is to use simple distributed sensor nodes in a home environment, to provide home assistants, nurses, healthcare centers and relatives with a degree of "understanding" and information about the(More)