Mohd. Rozaini Abd. Rahim

Wireless Home Security and Automation System Utilizing ZigBee based Multi-hop Communication

Nowadays, smart home using wireless communication is replacing the wired system which was very messy and difficult to setup. However, the existing wireless smart home system only can cover up to a certain range of area that is limited by the range of wireless module being used. This paper introduces the conceptual understanding and strategy of ZigBee IEEE 802.15.4 standard to be deployed in smart home environment. ZigBee technology offers a multi-hop communication capability for data transfer. Multi-hop communication will provide unlimited range of communication for the system as long as there are intermediate nodes that will pass the data from one node to another until it reaches the destination. Prototype systems of home security and automation are built utilizing Zigbee based sensor network to present an insight for its practical implementation in smart home concept.

Home healthcare via wireless biomedical sensor network

Fast information retrieval is pivot of medical breakthrough to provide quality medical services. There were a number of attempts to develop clinical information system (CIS) which is reliable, affordable and accessible over the entire hospital and beyond. Todays home healthcare progression is becoming a predominant form of healthcare delivery. Although there have been many recent advances in biomedical sensors, low-power radio communication and embedded computation, there does not yet exist a flexible, robust communication infrastructure to integrate these devices into an emergency care setting. An efficient wireless communication substrate for medical devices that addresses ad hoc or fixed network formation, naming and discovery, security and authentication, as well as filtration and aggregation of vital sign data need to be studied. The potential applications will save lives, create valuable data for medical research, and cut the cost of medical services. In this paper, we focus on home healthcare via wireless sensor network (WSN) platform. WSN composed of a large number of sensor nodes and multi-hop networking capability that are densely deployed for a wide variety of applicants such as smart buildings, interactive user interfaces, environment control and highly suitable for monitoring in military and biomedical applications. We describe our experiences in developing and implement both hardware and software platform for medical sensor network, provides protocol for device discovery and multi-hop routing, as well as a simple query interface that is tailored for medical monitoring.

Design and implementation of Wireless Biomedical Sensor Networks for ECG home health monitoring

Sensor network, in the form of wireless biomedical sensor network (WBSN), composed of a number of biomedical sensor nodes and multihop networking capability that can be deployed for long term and continuous healthcare monitoring. Physiological signals (ECG, EEG etc) will be measured by the biosensors that provide alerts immediately when abnormalities in a patients physiological condition are detected. Development of wearable biomedical sensors within a wireless infrastructure opens up possibilities for smart home care by providing ubiquitous monitoring of patients under their physiological states even when they move, leading to better quality of patient care. In this paper, we describe the design and implementation of wireless biomedical sensor network (WBSN) node platform featuring a low-power CMOS 8-bit microcontroller, an IEEE 802.15.4 compatible transceiver and a compact ECG sensor that does not require skin preparation, gels, or adhesives. The developed platform is cost-effective and allows easy customization, energy-efficient computation and communication.

Testbed design for Wireless Biomedical Sensor Network (WBSN) application

In wireless sensor network (WSN), a collection of nodes interacts with each other to gather information from the surveillance area. Some of the applications that WSN are currently being used are habitat monitoring, health care system and building automation, to name a few. Wireless Biomedical Sensor Network (WBSN) allows capturing of physiological signals, continuous monitoring and updating of a patients medical status remotely. This paper focuses on the development of a wireless sensor node testbed for WBSN application which complies with IEEE 802.15.4 standard and operates in 2.4 GHz ISM (industrial, scientific and medical) band. The initial state of WBSN development is the design of the wireless sensor node called TelG. The main features of TelG include low power consumption, wearable, flexible and small size. It is then embedded with a self-built operating system called WiseOS to support customized operations. A pulse oximeter is then integrated with TelG for the purpose of experimentation. The testbed performance is analyzed in terms of packet reception rate (PRR) and end-to-end delay. The results exhibit a decrease in PRR as distance increases and increasing network delay with increasing number of hops. It is also observed that received signal using the testbed is satisfactory for distances less than 10 meters per hop.

TelG Mote: A green wireless sensor node platform for smart home and ambient assisted living

The wireless sensor network (WSN) consists of sensor nodes that interact with each other to collectively monitor environmental or physical conditions at different locations for the intended users. One of its potential deployments is in the form of smart home and ambient assisted living (SHAAL) to measure patients or elderly physiological signals, control home appliances, and monitor home. This paper focuses on the development of a wireless sensor node platform for SHAAL application over WSN which complies with the IEEE 802.15.4 standard and operates in 2.4 GHz ISM (industrial, scientific, and medical) band. The initial stage of SHAAL application development is the design of the wireless sensor node named TelG mote. The main features of TelG mote contributing to the green communications include low power consumption, wearable, flexible, user-friendly, and small sizes. It is then embedded with a self-built operating system named WiseOS to support customized operation. The node can achieve a packet reception rate (PRR) above 80 for a distance of up to 8 m. The designed TelG mote is also comparable with the existing wireless sensor nodes available in the market.

A Service Oriented middleware for Smart Home and Ambient Assisted Living

Due to the complexity issue of developing heterogeneous Wireless Sensor Network application such as limited reusability, non-scalability, tight coupling between platform and application, a new middleware needs to be introduced to solve these problems. A distributed system framework such as Service Oriented Architecture (SOA) can definitely resolve these issues. SOA framework is able to hide the complexity lower layer to the application programmer and also create modular programming that can support different platforms. This paper aims to provide the service oriented middleware that supports heterogeneous services in Smart Home and Ambient Assisted Living (SHAAL) application.

Wireless medical monitoring instrumentation system using fabric dipole antenna

Nowadays, most effective nurses time was spent on recording patient information data manually. By monitoring wirelessly, the nurses routine work processes can be fully automated, saving time while at the same time ensure patient care continues to remain effective and efficiency. In this paper, the 2.45 GHz monitoring system using dipole antenna is presented. The performance of Spo2 monitoring for indoor and outdoor environment is discussed and verified. The performance in outdoor environment is better compared with indoor environment.