Yi-Wei Ma

OSGi-based services architecture for Cyber-Physical Home Control Systems

With the development of digital home appliances, the vision of a digital home can be realized, and users can control home appliances by remote control through the home network. However, current home networks have a variety of transmission control information media, such as WLAN, Zigbee, ECHONET, and LonWorks, resulting in an issue of interoperability of different network protocols. To solve this problem, this study proposes a OSGi-based service architecture for Cyber-Physical Home Control Systems, which supports service-oriented control methods. Users can control appliances in the physical environment by intuitive operation through a virtual home on the network. When the state or location of any appliance in the physical environment changes, the virtual context can enact timely changes, accordingly.

Mobile RFID with IPv6 for phone services

This study proposed integrating Mobile RFID and IPv6 mechanisms, in order for mobile phones to read ID labels on posters, acquire data via mobile network without need of data transmission and conversion by several servers. This mechanism could reduce data transmissions and waiting time of users, and provide the users with more convenient applications. Moreover, the proposed architecture complies with RFID-related standards of EPCglobal, making it possible for users to select the intended system, depending on their requirements and degree of equipment support. Final the experiment results show that the proposed system can save an average access time of 100ms.

An efficient management system for wireless sensor networks.

Wireless sensor networks have garnered considerable attention recently. Networks typically have many sensor nodes, and are used in commercial, medical, scientific, and military applications for sensing and monitoring the physical world. Many researchers have attempted to improve wireless sensor network management efficiency. A Simple Network Management Protocol (SNMP)-based sensor network management system was developed that is a convenient and effective way for managers to monitor and control sensor network operations. This paper proposes a novel WSNManagement system that can show the connections stated of relationships among sensor nodes and can be used for monitoring, collecting, and analyzing information obtained by wireless sensor networks. The proposed network management system uses collected information for system configuration. The function of performance analysis facilitates convenient management of sensors. Experimental results show that the proposed method enhances the alive rate of an overall sensor node system, reduces the packet lost rate by roughly 5%, and reduces delay time by roughly 0.2 seconds. Performance analysis demonstrates that the proposed system is effective for wireless sensor network management.

Load-balancing mechanism for the RFID middleware applications over grid networking

RFID middleware often has to process enormous amounts of data, possibly causes overloading and leading to data errors. Therefore, RFID middleware applications require load-balancing mechanisms. This work proposes a grid-based load-balancing mechanism for RFID middleware applications. The proposed mechanism incorporates functional modules Buffer Management and Load Balancing Management over a grid networking platform, to buffer the read data and share the middleware loading, thereby solving the overloading issues in RFID applications. Performance analysis results show that the proposed mechanism is more efficient than the existing mechanisms. The mechanism has an average improvement of 29.15% for the processing time and improvement of 88.75% for the packet lost ratio, while the number of middleware hosts is fixed. The proposed RFID load-balancing mechanism is indicated to be very reliable.

Multi-hop routing mechanism for reliable sensor computing.

Current research on routing in wireless sensor computing concentrates on increasing the service lifetime, enabling scalability for large number of sensors and supporting fault tolerance for battery exhaustion and broken nodes. A sensor node is naturally exposed to various sources of unreliable communication channels and node failures. Sensor nodes have many failure modes, and each failure degrades the network performance. This work develops a novel mechanism, called Reliable Routing Mechanism (RRM), based on a hybrid cluster-based routing protocol to specify the best reliable routing path for sensor computing. Table-driven intra-cluster routing and on-demand inter-cluster routing are combined by changing the relationship between clusters for sensor computing. Applying a reliable routing mechanism in sensor computing can improve routing reliability, maintain low packet loss, minimize management overhead and save energy consumption. Simulation results indicate that the reliability of the proposed RRM mechanism is around 25% higher than that of the Dynamic Source Routing (DSR) and ad hoc On-demand Distance Vector routing (AODV) mechanisms.

Applied Lightweight Parallel Multi-Appliance Recognition on Smart Meter

With the crisis of uprising energy, smart meter development has gained a lot of attention. Along with the popularization of Internet of Things (IoT) and home energy management system, users can identify the electronic device being used with the help of electronic appliance recognition technology in order to improve power usage habits. However, there is a difficulty in multiple electronic appliance recognition which poses as a problem since multiple appliances switching on and off is common in everyday life. Hence this study will discuss simultaneous multi-electronic appliance recognition. Another issue in smart meter development is the difficulty in installation. This study solves this problem by proposing a non-invasive smart meter device that also studies the user power usage habits in cases where users are unfamiliar with electronic devices. The system also solves the large data volume processing problem of the current appliance recognition system using a database mechanism, electronic appliance recognition classification, as well as waveform recognition. Other electronic appliance recognition may be power consuming, while this system uses low power low order embedded system chip with high expandability and convenience. Different from past studies, this research considers simultaneous multi-electronic appliance recognition and power usage habits of normal users. The experimental results showed that the total system recognition rate can reach 86.14% with the general daily power usage habits, and the total recognition rate of a single electronic appliance can reach 96.14%, thus proving the feasibility of the proposed system.

Socio-organism inspired model forming multi-level computational scheme for integrated IoT service architecture

An ambitious goal is to unify the existing global Internet of Things (IoT) architectures. This paper offers a concept for extending the functions of IoT objects in order to obtain an integrated, advanced IoT infrastructure. It is accomplished by composing an IoT architecture that imitates brain-neural systems of living organisms and creating an intelligent framework inspired by human-to-human socio interactions that will serve as a model for machine-to-machine interactions. By gaining an understanding of this concept, researchers will be inspired to shape this unified IoT infrastructure by multi-level computation approach.

A Portable Universal Plug and Play Home System for Sharing Multimedia Contents

Based on the Universal Plug and Play (UPnP) home network, this study established a portable plug-and-play multimedia sharing system, comprised of a Portable Media Sharing Server and Portable Media Player. With this Server, multimedia access services not yet defined by the UPnP architecture could support services shared by iPod, DVD, IP-Cam, and digital TV, in order that users could share multimedia files from any computer through a USB drive program under the same home network environment, without the need of complex installation software and settings. Finally, with the Portable Media Player developed by this study, users not adept in computer operations of mouse or keyboard could have easy access to such multimedia messages, and play them on any computer.

An efficient code gateway for RFID seamless applications

This work presents novel design schemes for the code gateway between the electronic product code (EPC) and ubiquitous ID (uID) for radio-frequency identification (RFID) technology solutions. Interfaces of the gateway that are implemented include the system interface, EPC discovery service (DS), uID DS, and the certification card mechanism. Five major operations are also developed, including inquiry of EPC DS, uID DS, code diversion mechanism, PIN-IC interface, and code conversion mechanism. Simulation results indicate that in addition to providing codes diversion and conversion, the proposed code gateway achieves low-order conformity between these two systems. Moreover, the implemented EPC DS and uID DS interface provide immediate commodity news and exchange of historical information. In addition to delivering inevitable processing efficiency, the integrated system between these two systems significantly improves ubiquitous computing environments. Copyright

Time-division secret key protocol for wireless sensor networking

A device of wireless sensor networks (WSNs) has restricted computational resources, and is always deployed in a harsh, unattended or hostile environment. This investigation presented the time-division secret key protocol for wireless sensor networking to detect denial-of-service (DoS) attack. Simulation results indicate that detect DoS attack and cipher function can be effectively applied to WSNs. The simulation results indicate that after running for 400 s, a detection jamming scheme still alive with 160 nodes, but the one with only 50 nodes does. This result demonstrates that a detection jamming scheme can extend the network lifetime when the WSN security is adopted.