Home Server Research Articles

Design of Multimedia Home Server System with High Definition Video Transmission Performance

근 미래의 가정에서는 개인용 컴퓨터를 사용하기 보다는 대용량 디스크가 내장된 홈 서버가 점차적으로 많이 이용될 것으로 예상되고 있다. 이러한 상황에서 모바일 기기 사용자들이 멀티미디어 홈 서버에 접속하여 원하는 멀티미디어를 정해진 고해상도 모니터를 통해 보고 싶어 하는 필요성이 대두된다. 이 연구에서는 고해상도 영상을 전송할 수 있는 멀티미디어 홈 서버의 설계를 다룬다. 이 서버는 RAID 구성의 대용량 디스크 시스템을 내장하고 있으며, 멀리 떨어진 고해상도 모니터에 비디오 신호를 무선으로 전송할 수 있도록 설계된다. 설계된 시스템은 실제 하드웨어 및 소프트웨어로 구현되어 4 테라 바이트 용량으로서 그 실효성을 보였으며, 실험을 통해 모바일 기기에 의하여 지정되어 홈 서버에서 실행된 멀티미디어 정보가 1080p(progressive) 수준의 고해상도 영상 형태로서 압축하지 않은 상태로 1초에 60프레임의 성능으로 모니터로 전송되는 것을 보였다.

A New Roaming Authentication Framework For Wireless Communication

Roaming authentication protocol is widely used in wireless network which can enable a seamless service for the mobile users. However, the classical approach requires the home server’s participation during the authentication between the mobile user and the foreign server. So the more the roaming requests are performed the heavier burden will be on the home server. In this paper, we propose a new roaming authentication framework for wireless communication without the home server’s participation. The new roaming authentication protocol in the new framework takes advantage of the ID-based cryptography and provides user anonymity. It has good performance compared with the roaming authentication protocols whose authentication do not need the home server’s participation in terms of security and computation costs. Moreover, a new User-to-User authentication protocol in the new framework is also present. All the authentications proposed in this paper can be regarded as a common construction and can be applied to various kinds of wireless networks such as Cellular Networks, Wireless Mesh Networks and Vehicle Networks.

Autonomous network repairing of a home security system using modular self-reconfigurable robots

Traditional wheeled robots cannot easily adapt to complex home environments with stairs and doorsills. This paper presents the design and implementation of a novel wireless sensor network based home security system with a modular self-reconfigurable robot (Transmote) as the mobile node. The security system is composed of some static monitoring nodes, a Transmote, and a home server. Static nodes with pyroelectric infrared (PIR) sensor and digital camera are mounted on doorframes and windows to detect intruders and send intrusion alarm messages to the home server. Transmote with PIR sensor and camera can patrol in the house for security surveillance. Transmote also can provide network repairing service when some static router nodes fail. Transmote modules and static monitoring nodes are controlled by two different wireless sensor networks. The remote house owner can get the alarm messages through Internet. Transmote can transform into I-shaped or O-shaped configuration according to different locomotion requirements. A prototype system has been implemented and some performance tests have been done. Experimental results show that the I-shaped Transmote can pass through an 8.8 cm high and 10 cm wide channel. The velocity of the I-shaped Transmote is up to 3 m/min and the maximum velocity of O-shaped Transmote is 9.3 m/min. A 12 kB captured photo can be transmitted to the gateway through 15 hops without any packet loss.

Study and Design of Home Intelligent System Based on Embedded

Home networking means high tech living environment which connect all the information electric appliances in the house with wire/wireless network and providing various services such as remote education, home automation and multimedia to anyone, anytime and anywhere free from boundaries. This thesis have designed and implemented a controlling system which control intelligent Home networking system with smart phone and server. Implemented intelligent home network system design proposed with home node structure, remote smart application system, and home server controlling system. Home node structure consists of intrusion detection, weather control, power control and On/Off control module and modules design proposed to be controlled from home server.

Scheme for preventing low-level denial-of-service attacks on wireless sensor network-based home automation systems

Remote access to home automation systems (HASs) through the Internet creates the potential for malicious users from across the Internet to attack the HASs. One such threat is that of a denial-of-service (DoS) attack that may disrupt communications or block remote access to the HASs. Existing approaches for DoS defence are generic and are not capable of filtering out all attack traffic, so a small amount of attack traffic reaches an HAS. This small level of attack traffic poses a significant threat to the HAS that are increasingly comprised of resource-limited wireless sensor networks (WSNs). This study proposes implements and evaluates a novel defence strategy designed to work alongside existing approaches for DoS defence to overcome the aforementioned shortcomings. The proposed defence strategy consists of three entities, the virtual home, remote home server and DoS defence server. The experimental results show that the proposed strategy can filter low-level attack traffic and thereby protect low-resource networks, such as WSN-based HASs.

Privacy‐preserving registration protocol for mobile network

SUMMARYIn this paper, we propose a novel privacy‐preserving registration protocol that combines the verifier local revocation group signature with mobile IP. The protocol could achieve strong security guarantee, such as user anonymity via a robust temporary identity, local user revocation with untraceability support, and secure key establishment against home server and eavesdroppers. Various kinds of adversary attacks can be prevented by the proposed protocol, especially that deposit‐case attack does not work here. Meanwhile, a concurrent mechanism and a dynamical revocation method are designed to minimize the handover authentication delay and the home registration signals. The theoretical analysis and simulation results show that the proposed scheme could provide high security level besides lightweight computational cost and efficient communication performance. For instance, compared with Yang's scheme, the proposed protocol could decrease the falling speed of handover authentication delay up to about 40% with privacy being preserved. Copyright © 2012 John Wiley & Sons, Ltd.

Development of an Ease-of-Use Remote Healthcare System Architecture Using RFID and Networking Technologies

The study aims to provide an ease-of-use approach for senior patients to utilize remote healthcare systems. An ease-of-use remote healthcare system (RHS) architecture using RFID (Radio Frequency Identification) and networking technologies is developed. Specifically, the codes in RFID tags are used for authenticating the patients' ID to secure and ease the login process. The patient needs only to take one action, i.e. placing a RFID tag onto the reader, to automatically login and start the RHS and then acquire automatic medical services. An ease-of-use emergency monitoring and reporting mechanism is developed as well to monitor and protect the safety of the senior patients who have to be left alone at home. By just pressing a single button, the RHS can automatically report the patient's emergency information to the clinic side so that the responsible medical personnel can take proper urgent actions for the patient. Besides, Web services technology is used to build the Internet communication scheme of the RHS so that the interoperability and data transmission security between the home server and the clinical server can be enhanced. A prototype RHS is constructed to validate the effectiveness of our designs. Testing results show that the proposed RHS architecture possesses the characteristics of ease to use, simplicity to operate, promptness in login, and no need to preserve identity information. The proposed RHS architecture can effectively increase the willingness of senior patients who act slowly or are unfamiliar with computer operations to use the RHS. The research results can be used as an add-on for developing future remote healthcare systems.

홈네트워크 상에서 속성정보를 이용한 티켓기반의 인증 프로토콜

Recently, LEE et al. proposed an attribute-based authenticated key agreement protocol over home network, which aimed to support authentication and key agreement between user and home server. However, if the home server is attacked in the protocol, the effects are influenced to the overall home network components severly. Thereby, this paper proposes a new ticket-based authentication protocol using user attributes between user and home devices to solve the problem. The proposed protocol supports the various levels of security to user by diversifying the network accessibility depending on user attribute. Thereby, the protocol could support more secure home network services.

스마트 TV 환경을 위한 4D 미디어 방송 서비스 시스템의 설계 및 구현

Recently, as the development of 3D contents service, production of 4D media that user can feel physical effects by the scene of movie has been increased. This 4D media uses the SMMD (Single Media Multiple Devices) method to give users enhanced effects with multiple devices playing rather than the SMSD (Single Media Single Device) method with single device playing in a smart TV environment. To give more sensible effects to users, from the beginning of making one media, we produced 4D media that consists of 3D contents and the SEM (Sensory Effect Metadata) to define effects of the scene. 4D media is transmitted to a HS (Home Server) to represent 3D contents in 3DTV and multiple devices with synchronized way. In this paper, we suggested the concept and overall 4D media broadcasting service system architecture, aggregator time acquisition, media time scheduling, real-sense device scheduling, evaluation results, user interfaces and implemented devices.

Building an Intelligent Home Space for Service Robot Based on Multi-Pattern Information Model and Wireless Sensor Networks

This paper is concerned with constructing a prototype intelligent home environment for home service robot. In this environment, multi-pattern information can be represented by some intelligent artificial marks. Light-packs service robots can provide reliable and intelligent service by interacting with the environment through the wireless sensor networks. The intelligent space consists the following main components: smart devices with intelligent artificial mark; home server that connects the smart device and maintains the information through wireless sensor network; and the service robot that perform tasks in collaboration with the environment. In this paper, the multi-pattern information model is built, the construction of wireless sensor networks is presented, the smart and agilely home service is introduced. Fi- nally, the future direction of intelligent space system is discussed.

An indoor security system with a jumping robot as the surveillance terminal

Mobile robots are now widely used in various surveillance and security applications. But most of them are wheeled and tracked robots that can not work well to overcome stairs, doorsills and other obstacles in cluttered indoor environments. This paper presents the design and implementation of a new indoor security system with a jumping robot as the surveillance terminal. The jumping robot, a gateway and some pyroelectric infrared (PIR) sensor nodes form a ZigBee wireless sensor network (WSN). The sensor nodes are installed above the doors and windows of the house to detect intruders and send intrusion detection messages to the robot. The robot can jump to the sensor coverage area to take photos and send them to the gateway and the home server. The remote house owner will get these photos through Internet. A prototype system has been implemented and some performance tests have been done. Experimental results show that the robot can jump up on a desk of 105cm high to perform the surveillance task. A 3k-byte captured photo can be transmitted to the gateway in 3.68s with 0.1% loss rate by 5 hops <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">1</sup> .

LBS를 이용한 스마트 폰 기반의 패밀리 네트워크 서비스 시스템

모바일 산업이 발달하면서 사람들은 개인 간의 보다 섬세한 정보교환과 이로 인한 끈끈한 유대관계를 추구하게 되었다. 이러한 요구에 소셜 네트워킹 서비스들이 단문 메시지 중심으로 활성화 되어 왔고, 최근엔 스마트 폰과 결합하면서 위치 정보를 추가하고자 하는 요구와 필요성이 증대되고 있다. 그러나 이러한 위치 정보는 민감한 정보이기 때문에 보안 및 프라이버시 문제가 대두되고 있다. 또한, 가족 구성원의 위치 정보를 공용 서버에 저장하는 것은 서비스 사용 활성화를 저해하는 요인이 될 수 있다. 본 논문에서는 가정내 홈 서버에서 사용할 수 있는 가정용 위치 정보 기반의 SNS 서비스를 제안하며, 사회의 가장 작은 구성단위인 가정에서 가족구성원들 간의 친목과 유대관계를 증진시킬 수 있는 보다 공익적인 서비스를 제안하고자 한다. As the mobile industry has developed, people have become to pursue more delicate information exchange and close relationships between individuals through it. According to such a request, Social Networking Services have been activated based on short messages. Moreover, in combination with smart phones, the needs for adding location information is recently increasing more and more. Security and Privacy problems, however, are raised because such location information is so sensitive and may be used maliciously by someone else. Especially, storing location information of family members in a public server may become a negative factor to hinder people from utilizing such services. Therefore, this paper proposes a location based SNS service using smart phones for home community that runs on a home server in a house so that relationships between family members at home may be closer and improved through utilizing the service.

원격 장치 제어를 위한 임베디드 기술 기반의 개인용 커뮤니케이터 설계 및 구현

This paper presents implementation details of home appliance control system using personal communicator based on LN2440 single board computer, which recognizes hand-gesture of user, controls remote moving device such as mobile home server, robot etc. through delivery of proper control commands. Also, this paper includes details of design and implementation of home gateway and mobile home server. The implemented prototype can be utilized to develop various remote control system including a remote exploration robot, intelligent wheelchair based on general purpose embedded system.

Comments on "An Anonymous and Self-Verified Mobile Authentication with Authenticated Key Agreement for Large-Scale Wireless Networks"

In a recent paper (IEEE Trans. Wireless Commun., vol. 9, no. 11, 2010), Chang and Tsai presented a self-verified mobile authentication scheme for large-scale wireless networks. In this letter, we show that there is a serious security flaw in the key delegation phase of the scheme: two colluding mobile users can retrieve the long-term secret key of their home server without performing any active attacks. We then present a suggestion to fix the problem without losing any features (such as high efficiency and scalability) of the original scheme.

Concurrent multipath transmission with forward error correction mechanism to overcome burst packet losses for delay-sensitive video streaming in wireless home networks

Wireless multimedia home servers are the next generation of home entertainment systems. The provision of high quality time-critical video streaming applications in indoor environments is very challenging due to high attenuation and interference caused by the walls and the contention in the shared wireless channel. This paper proposes a Delay-sensitive Multipath Forward Error Correction (DM-FEC) mechanism involving an estimation of available bandwidth and a mathematical analytical model with which the appropriate transmission rate, the FEC block length, and the FEC redundancy on each path in a multipath environment can be determined to solve previous problems. The DM-FEC mechanism not only selects the appropriate transmission rate and FEC redundancy on each path but also adaptively adjusts the FEC block length and concurrently sends data over multiple paths to overcome burst packet losses which otherwise can cause the video frame to be unplayable and impede the timely recovery of video information.

A Home Automation system based on Smart phone

Smart Home or Home Network technology is one that continuously creates added value, making a better life. This paper designed and developed a smart home control system using smart phone. This proposed smart home system consists of home server control system, remote smart application system and home node structure. Home node structure, in detail, is composed of intrusion detection, gas leakage or gas valve control, door lock, automatic curtain, ventilation control and On/Off control modules and these modules are controlled at home server. Home server makes it easy to control home automatic control system anytime, anywhere as it provides remote interface that enables control via smartphone and user interface in itself.

User-friendly home automation based on 3D virtual world

Home automation refers to a system that is used to control devices around the home. These devices can include doors, lights, surveillance systems, and consumer electronics. A user can control a variety of home devices with the help of a home automation system. To provide mobility, a mobile phone-based home automation has been developed. As another approach toward home automation, an Internet-based home automation system has been proposed, providing a graphic user interface. However, these systems lack userfriendliness and are neither intuitive nor realistic. To improve the user-friendliness of the interface, a 3D view interface was designed. However, its level of realism was low. In this study, to provide a more realistic interface, a 3D virtual world is adopted as the user interface for a home automation system. Additionally, a home server is used as a controller for home devices. As an information exchange format between the virtual and the real world, a control protocol that works under a standardization process is introduced. With the help of a 3D virtual world, a user can control and monitor home devices via a user-friendly interface that works both intuitively and realistically anywhere and anytime through the Internet.

Universal authentication protocols for anonymous wireless communications

A secure roaming protocol allows a roaming user U to visit a foreign server V and establish a session key in an authenticated way such that U authenticates V and at the same time convinces V that it is a legitimate subscriber of some server H, called the home server of U. The conventional approach requires the involvement of all the three parties. In this paper, we propose a new approach which requires only two parties, U and V, to get involved. We propose two protocols: one provides better efficiency and supports user anonymity to an extent comparable to that provided by current mobile systems; and the other one achieves strong user anonymity that protects U's identity against both eavesdroppers and foreign servers and is currently the strongest notion of user anonymity defined for secure roaming. Both protocols are universal in the sense that the same protocol and signaling flows are used regardless of the domain (home or foreign) that U is visiting. This helps reducing the system complexity in practice. We also propose a practical user revocation mechanism, which is one of the most challenging problems for two-party roaming supporting strong user anonymity. Our solutions can be applied in various kinds of roaming networks such as cellular networks and interconnected wireless local area networks.

A multi-channel remote controller for home and office appliances

This paper presents the design and implementation of a multi-channel remote controller (MCRC) for home and office appliances. The aim of this work is to integrate several existing remote controller channels in a common platform. The proposed controller supports access to controlled environment via Web Page, Smart-Phone (SP), PDA, GSM network and telephone lines. The suggested controller is more reliable than conventional ones especially during emergency condition such as main server failure and interruption in GSM or Internet network. The suggested system enables easy and flexible access to controlled devices. The hardware part of the controller contains a home server which is built upon PC and auxiliary microcontrollers. The feasibility of this architecture has been demonstrated with a prototype implementation and presented in details.

Portable Raman Lidar PollyXT for Automated Profiling of Aerosol Backscatter, Extinction, and Depolarization

Abstract Two versions of the portable aerosol Raman lidar system (Polly) are presented. First, the two-channel prototype is depicted. It has been developed for the independent and simultaneous determination of particle backscatter and extinction coefficient profiles at 532 nm. Second, the 3 + 2 Raman lidar PollyXT (3 + 2: three backscatter and two extinction coefficients), the second generation of Polly, is described. The extended capabilities of PollyXT are due to the simultaneous emission of light with three wavelengths, more laser power, a larger main receiver mirror, and seven receiver channels. These systems are completely remotely controlled and all measurements are performed automatically. The collected data are transferred to a home server via the Internet and are displayed on a Web page. This paper describes the details of the optical setup, the housekeeping of the systems, and the used data retrieval routines. A measurement example taken close to Manaus, Brazil, on 15 August 2008 shows the capabilities of PollyXT.