• KIISE Transactions on Computing Practices
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• v.21 no.3
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• pp.269-274
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• 2015

As smart device companies such as Google or Apple develop competitive mobile-based automotive operating systems and navigation systems, the range of choice for users in such markets is expanding. Navigation systems equipped with mobile operating systems have increased convenience for users. However, since an API for the POI databases used in navigation systems doesn't exist, the number of applications using POI data is insufficient. In this paper, we designed and implemented system calls for navigation operating systems with a focus on POI search, in order to resolve such limitations. The system calls support set-based POI search functions, and therefore provides solutions to search performance degradation problems caused by false inputs. As a result of performance evaluation, not only did the search performance improve, but there was also no problem in applying APIs in applications.

• Electronics and Telecommunications Trends
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• v.28 no.6
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• pp.99-106
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• 2013

빠른 속도로 보급되고 있는 스마트폰과 함께 위치 기반 서비스(LBS: Location Based Service) 시장 또한 빠르게 성장하고 있다. 실내에서의 위치 기반 서비스 요구사항이 증가하는 반면 실내 위치 추적의 기술적 어려움 때문에 실내 LBS는 기대에 부응하지 못하고 있는 실정이다. 그럼에도 불구하고 그 시장성 때문에 글로벌 IT(Information Technology) 기업들의 다양한 시도와 노력이 이루어지고 있다. 본고에서는 스마트폰 운영체제의 양대산맥인 매Android와 iOS를 개발한 구글과 애플의 지도 및 내비게이션 기술, 위치 기반 개인 비서 서비스 및 근거리 통신 기반 위치 기술 서비스에 대한 최신 동향을 살펴본다.

• Proceedings of the Korea Information Processing Society Conference
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• 2012.11a
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• pp.142-144
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• 2012

Tizen은 삼성전자와 인텔(Intel), 리눅스 재단(Linux Foudation)이 공동으로 개발한 리눅스(Linux) 기반의 오픈 소스 플랫폼(Open Source Platform)이다. Tizen은 스마트폰(Smart Phone)과 태블릿 PC(Tablet PC)를 위한 운영체제이지만 GPS(Global Positioning System) 내비게이션을 포함한 자동차 인포테이먼트(In-Vehicle Infotainment) 시스템과 넷북(Netbook), 스마트 TV(Smart TV)에서도 사용될 수 있도록 개발되었다. Tizen은 안드로이드(Android)와 마찬가지로 리눅스 커널(Kernel)에서 실행할 수 있지만, 소프트웨어 프레임워크(Software Framework)는 HTML5(Hypertext Mark-up Language 5)로 설계되었다. 또한 Tizen은 HTML5 를 기반으로 다른 플랫폼에서도 쉽게 호환될 수 있는 웹 어플리케이션의 실행을 지원한다는 특징을 갖고 있다. 본 논문에서는 Tizen 웹 어플리케이션 개발의 기반이 되는 HTML5 API 와 Tizen 웹 API 를 중점적으로 살펴 본다. 그리고 이 두 가지 핵심 요소에 대한 이해를 통해 Tizen 의 향후 발전가능성을 조명한다.

• Journal of the Institute of Electronics Engineers of Korea CI
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• v.47 no.5
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• pp.50-60
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• 2010

For the last half a century, the personal computer and software industries have been prosperous due to the incessant evolution of computer systems. In the 21st century, the embedded system market has greatly increased as the market shifted to the mobile gadget field. While a lot of multimedia gadgets such as mobile phone, navigation system, PMP, etc. are pouring into the market, most industrial control systems still rely on 8-bit micro-controllers and simple application software techniques. Unfortunately, the technological barrier which requires additional investment and higher quality manpower to overcome, and the business risks which come from the uncertainty of the market growth and the competitiveness of the resulting products have prevented the companies in the industry from taking advantage of such fancy technologies. However, high performance, low-power and low-cost hardware and software platforms will enable their high-technology products to be developed and recognized by potential clients in the future. This paper presents such a platform for industrial embedded systems. The platform was designed based on Telechips TCC8300 multimedia processor which embedded a variety of parallel hardware for the implementation of multimedia functions. And open-source Embedded Linux, TinyX and GTK+ are used for implementation of GUI to minimize technology costs. In order to estimate the expected performance and power consumption, the performance improvement and the power consumption due to each of enabled hardware sub-systems including YUV2RGB frame converter are measured. An analytic model was devised to check the feasibility of a new application and trade off its performance and power consumption. The validity of the model has been confirmed by implementing a real target system. The cost can be further mitigated by using the hardware parts which are being used for mass production products mostly in the cell-phone market.