Yong-Duck You

A bluetooth-UPnP bridge for the wearable computing environment

This paper presents a software bridge connecting Bluetooth devices and the UPnP network using a virtual agent, which aims at the wearable computing environment. The bridge enables a non-IP Bluetooth device to work as an IP based UPnP device. Upon discovering a Bluetooth device, the bridge registers a corresponding UPnP virtual device and automatically generates its UPnP description using the extracted information. The experimental results show that the Bluetooth device can join the UPnP network and establish its service with negligible overhead.

Design and Implementation C Based Lightweight Component Framework

The resource-limited embedded devices such as a wearable computer use battery power and have limited system resource. The software for these systems must be developed as dynamically reconfigurable component-based system to save the memory space. In this study, we design and implement the ANSI C-language-based, lightweight component framework that can dynamically install software components and reconfigure the system according to the requirement of application programs. The component manager which is the core of the component framework is only 23-Kbyte long. Therefore, the implemented component framework reduces the overall resource requirement and making it suitable for a resource-limited embedded system

Autonomic System Management for the PDA

This paper describes the component-based autonomic computing system for the PDA or smart phone. The proposed method includes self reconfiguration and self-healing. The self reconfiguration provides the dynamic reconfiguration of middleware according to the upgrade of middleware components and provides efficient execution of the application by organizing the minimal set of middleware components. The self healing provides the system recovery and the re-installation of the application and middleware components against runtime errors from the applications.

Autonomic system management for personal digital assistants

This paper describes and proposes an autonomic computing system for PDAs or smart phone devices. The proposed system incorporates two major functions: self healing and self reconfiguration. The self healing enables system recovery when an error occurs during the operation of an application program or a middleware component whereas the self reconfiguration facilitates efficient management of system resources by autonomic management of system versions and dynamic reconfiguration of the middleware components .

The Lightweight Runtime Engine of the Wireless Internet Platform for Mobile Devices

This paper proposes a lightweight runtime engine that is the core part of the wireless Internet platform of mobiles devices such as cellular phones or PDAs. The proposed lightweight runtime engine downloads and executes mobile applications in the binary form. Its memory footprint is less than 100 Kbytes and consists of the lightweight scheduler module, memory management module, dynamic reconfiguration module, event handler module, and timer module. The lightweight scheduler can process events 13% faster than a competitive technique which is the widely used thread-based scheduler. The memory management module works 6 ~10 times faster than other memory management algorithms, and the proposed dynamic reconfiguration module also shows a good performance in reconfiguring the platform software.

Design and evaluation of network plug and play component for wearable computing system

This paper discusses the NPnP (Network Plug and Play) component that offers a bridging technique for UPnP (Universal Plug and Play) and Bluetooth in the wearable computing environment. The wearable computing environment is restricted in computing resources and processing capability because this environment consists of various wireless devices for different services. Consequently, a new lightweight middleware technique is needed to control these. As an agent component bridging wireless devices and comprising the wearable computing environment in the UPnP network, the NPnP component is one of the essential components of the wearable middleware framework introduced in this paper. As an introduction, this paper discusses the NPnP components for Bluetooth from among several wireless devices.

Design and Implementation of the communication protocol for efficient CBC mode processing in IPSec

The IV (initial vector) used in CBC mode must be varied per message, must not be used arbitrarily by attackers, and must be created randomly. To meet these requirements, IV encrypted before a message is sent. Note, however, that this method requires additional steps for IV encryption before sending a message and decryption by the receiver. This paper proposed the method that does not require IV encryption/decryption and developed the lightweight protocol and security API specification based on the proposed method. As a result of the experiment, system performance improvement can be achieved. In an environment with small-sized packet data, in particular, greater system performance improvement can be achieved. Moreover, since small-sized random numbers are sent without the entire IV, sending overhead can be reduced considerably compared to the existing methods

The Bridge Component for UPnP and Bluetooth for a Wearable Computing Environment

Home networks in the future will be complex systems of the BANs (body area networks) and the PANs (personal area networks), and will be composed of various wireless devices. Therefore, the self-discovery protocols that serve to control and maintain these devices are crucial. This paper proposes a bridge service that extends the capacity of widely used and IP based UPnP discovery protocol to a non-IP wireless device (Bluetooth). The bridge service has been implemented in an NPnP middleware component for a wearable computing environment in the BAN.

Design and Implementation of the High-Speed Encryption Processing System for the Variable Sized Data in Cryptoki

This paper studies methods of processing the data of variable sizes in the Cryptoki standard of RSA which is used in academic and industrial environment as an unofficial API standard, and proposes the methods of improving its performance for the high-speed encryption processing system. Compared with existing method, the proposed method showed 13.7 times improvement in cryptographic performance with small sized data and also showed approximately 2 times improvement with larger data of 65,536 bytes. Therefore, the proposed method proved to be an efficient method of encryption and decryption of small sized data in network and ubiquitous environment.