Bon-Hyun Koo

R-URC: RF4CE-Based Universal Remote Control Framework Using Smartphone

RC (Remote Control) is a technology that can efficiently control and transfer a variety of user commands to CEs (Consumer Electronics). However, the existing RCs have been required various additional features such as communication between CEs, extension of communication range, low power-consumption and bi-directional communication according to the advent of new types of CE devices and its enhanced performance. Even though RC controller has many customers’ requests, it is not a simple solution because most legacies work on IR-based RC. In this paper, we propose RF4CE-based Universal Remote Control Framework using Smartphone in order to solve the many constraints of IR legacies. The proposed R-URC system is designed by RF4CE platform which is a kind of de-facto standard for CE remote control communication. From the verification scenarios using various CEs and smart phone, we can see that the proposed R-URC shows the good practical usage in terms of contents sharing and smart CE control.

Novel approaches to enhance mobile WiMAX security

The IEEE 802.16 Working Group on Broadband Wireless Access Standards released IEEE 802.16-2004 which is a standardized technology for supporting broadband and wireless communication with fixed and nomadic access. After the IEEE 802.16-2004 standard, a new advanced and revised standard was released as the IEEE 802.16e-2005 amendment which is foundation of Mobile WiMAX network supporting handover and roaming capabilities. In the area of security aspects, compared to IEEE 802.16-2004, IEEE 802.16e, called Mobile WiMAX, adopts improved security architecture—PKMv2 which includes EAP authentication, AES-based authenticated encryption, and CMAC or HMAC message protection. However, there is no guarantee that PKMv2-based Mobile WiMAX network will not have security flaws. In this paper, we investigate the current Mobile WiMAX security architecture focusing mainly on pointing out new security vulnerabilities such as a disclosure of security context in network entry, a lack of secure communication in network domain, and a necessity of efficient handover supporting mutual authentication. Based on the investigation results, we propose a novel Mobile WiMAX security architecture, called RObust and Secure MobilE WiMAX (ROSMEX), to prevent the new security vulnerabilities.

Security Architecture for IEEE 802.15.4-based Wireless Sensor Network

A wireless sensor network consists of low power devices which have limited computing resources. Thus, energy consumption is one of the most significant issues in wireless sensor network environment. For various sensor network applications, security features are also to be a rising big issue more and more. If wireless sensor network supports a variety of security functions, more powerful devices and more energy are required. On the other hand, providing security feature and energy consumption together face a trade-off. Therefore, in this paper we propose a novel efficient security architecture in IEEE 802.15.4-based wireless sensor network called Hybrid Adaptive Security Framework. The goal of the proposed security framework is to provide hybrid adaptive security suites to each packet according to various WSN considerations.

Design and implementation of a wireless sensor network architecture using smart mobile devices

Wireless sensor networks improve the quality of human daily life like ubiquitous city and healthcare services as well as the fundamental monitoring such as environment pollution, tunnel monitoring, earthquake diagnostic, and so on. To increase usability and feasibility of collected sensor data, a wireless sensor network should be required to apply a variety of mobile devices to give the information at anytime and anywhere to users. Thus, we present multi-sensor centric smart sensor network architecture using general mobile devices in order to provide more efficient and valuable sensor network application and services. The proposed system architecture is based on IEEE 802.15.4-2006 standard with smart mobile devices. We also show some scenarios with on-demand request and real time event driven data to show the feasibility of the proposed architecture using five kinds of sensors such as magnetic, photodiode, microphone, motion and vibration. Based on the experiment results, we show that the proposed system has the potential as smart mobile device-based wireless sensor network architecture.

WIVA: WSN Monitoring Framework Based on 3D Visualization and Augmented Reality in Mobile Devices

Research on structural health monitoring (SHM) is gaining importance recently due to increase in industrial accidents at construction sites. Wireless sensor networks (WSN) are considered as the promising advanced SHM technology to provide real time site applications using SHM. In this paper, we propose the WIVA (WSN Monitoring Framework based on 3D Visualization and Augmented Reality in Mobile Devices) architecture. The proposed architecture applies 3D visualization and AR technology to camera enabled mobile devices in order to provide real time information to users. Moreover, we performed an experiment to validate the effectiveness of 3D and AR mode based WIVA architecture in IEEE 802.15.4-based WSN. In a real implementation scenario, we demonstrated a fire detection test in a 3-story building miniature.

A novel approach to visualize web anomaly attacks in pervasive computing environment

These days, a pervasive computing environment is a rapidly changing trend towards increasingly always-on connected computing devices in the convergence environment. In a pervasive computing environment, there are various multimedia web services and communications for various devices in order to provide interesting and invaluable information to users. Meanwhile, providing a wide variety of the web-based multimedia services and communications may cause various security threats and abnormal behaviors. In this paper, a multimedia visualization approach for pervasive computing environment is proposed which analyzes HTTP request and response header information to detect and visualize multimedia web attacks based on the Bayesian method. We conducted a few cases’ experiment for the verification of the proposed approach in a real environment. The experimental results such as web attack detection visualization, scanning and password attack visualization, and attacker’s position tracking visualization verify the usability of the proposed approach.

WiFi Auto Configuration Architecture Using ZigBee RF4CE for Pervasive Environments

This paper presents a novel architecture to provide a simple and easy control and sharing between various CE and IT devices for realizing a smart digital home using RF4CE that is based on IEEE 802.15.4. The proposed architecture is working on RF4CE which is a reliable bidirectional communication standard and also optimizes Zigbee protocol in order to provide a simple and energy efficient networking stack and standard application profiles in creating a multi-vendor interoperable solution for home entertainment and monitoring. In proposed architecture, RF4CE protocol provides a key idea to establish an initial network between devices. After that, the proposed architecture is probing a connection type from devices, and then sharing configuration information to make a zero-configuration, i.e., Wi-Fi connectivity setup. In order to show the feasibility of the proposed architecture, we make a development various H/W prototypes and implementation results demonstrate a mobile terminal can control other devices and provide contents sharing between the devices. Furthermore, based on the RF4CE-based zero-configuration architecture, it can be extended to support smart connectivity in a smart digital home with various wireless technologies like Wi-Fi, Bluetooth, UWB, and so on.

A Structural Health Monitoring Framework Using 3D Visualization and Augmented Reality in Wireless Sensor Networks

These days structure health monitoring (SHM) plays an important role in assessing the integral safety of structures like various types of buildings and bridges, both during the process of and after construction. A lot of research related to the structural health monitoring for building construction is progressing because of increasing industrial accidents and disasters at construction sites. In order to provide more efficient SHM solution in construction sites, wireless sensor networks (WSN) has risen as one of the advanced candidate technologies. In this paper, we proposed WSN monitoring framework based on 3D Visualization and Augmented Reality in Mobile Devices. The proposed system applied 3D visualization and AR technology to camera-enabled mobile devices in WSN environment in order to gather much more information than before. Based on the proposed system, we made an experiment to validate the effectiveness of 3D and AR mode using collected data in IEEE 802.15.4-based WSN. In addition, we demonstrated the fire alarm detection experiment in three-story building miniature as a real implementation scenario.

A novel low-power RF4CE-based communication framework for multimedia system control

A remote control (RC) is a component that operates electronic devices wirelessly issuing commands to consumer electronics (CE). Such existing RC solutions are based mainly on the infrared radiation (IR) technology with a line-of-sight barrier and they lack various additional features such as bi-directional and richer communications, low-power consumption, and no line-of-sight barriers which are needed for the flexibility and interoperability of more intelligent new CE devices on the market. In this paper, we propose a novel low-power RF4CE-based communication framework (RCF) for Multimedia System Control in order to overcome many constraints of IR-based legacy solutions and support energy-efficient multimedia communications. The proposed RCF framework is designed for multimedia control communication using smart phones, adopting the RF4CE protocol which is a de facto radio frequency standard for CE remote control solutions. The analysis of energy consumption and two verification scenarios (one for CE control and the other for contents sharing), including the use of various CEs and smart phones, show that our proposed RCF framework provides good practical usage in terms of content-sharing and smart CE control. Copyright

WACA: WearAble Device Based Home Control Assistant Framework

In this paper, we have analyzed requirements and pain points of legacy wearable-based IoT and smart home services. In conventional system, we are required to wear additional accessory devices, and to move to specific areas to control and manage the home devices. In order to solve these restrictions, we have implemented WACA framework by using well-known general wearable devices. We also present the gesture-interaction based device control architecture using the wearable devices to provide more efficient and valuable smart home services. Based on the experiment results, we show that the proposed system has the potential as wearable device-based universal control assistance architecture.