• Proceedings of the Korea Information Processing Society Conference
• /
• 2006.05a
• /
• pp.1351-1354
• /
• 2006

최근 들어 RFID(Radio Frequency IDentification) 및 USN(Ubiquitous Sensor Network) 기술개발과 응용에 대한 국내외의 관심이 고조되고 있으며, RFID 기술 및 USN기술은 미래 핵심기술로 새로운 시장을 창출할 수 있음은 물론, 모든 산업에 접목하여 새로운 정보화 혁명을 주도할 것으로 전망되고 있다. 본 논문은 RFID Middleware가 구축되었다는 가정 하에 RFID/USN 인프라를 어떻게 구축할 것인가에 대한 연구 및 RFID/USN 기술 중 RFID/USN 인프라 구축을 지원하는 정보 관리 시스템에 대한 소개, 역할 및 시스템의 구조를 설명한다.

• The KIPS Transactions:PartC
• /
• v.14C no.1 s.111
• /
• pp.95-104
• /
• 2007

Mobile multimedia services such as TV-call or video streaming are gradually becoming popular in the 3rd or more generation mobile network (IMT-2000). Multimedia traffic is expected to continue increasing into the coming years, and IP technology is considered to be the efficient way of transporting such huge volumes of multimedia traffic. IP-based IMT network platform represents an evolution from IMT-2000. The structure of IP-based IMT network as ubiquitous platform is three-layered model : Middleware including Network Control PlatForm (NCPF) and Service Support PlatForm (SSPF), IP-BackBone (IP-BB), access network including sensor network. Mobility Management (MM) architecture in NCPF is proposed for IP-based IMT network in order to manage routing information and location information separately. The generous existing method of multicast control in IP-based IMT network is Remote Subscription. But Remote Subscription has problem that should be reconstructed whole multicast tree when sender in multicast tree moves to another area. To solve this problem, we propose the way to put Multicast-manager in NCPF.

• Journal of the Korea Society of Computer and Information
• /
• v.17 no.3
• /
• pp.41-50
• /
• 2012

In the monitoring system based on web service application, it is faced with the problems like code reproduction, difficult scalability and error recovery derived from the frequent change of data structure. So we propose a technique of monitoring system by DTD(Document Type Definition) automatic generation. This technique is to use dynamic server-side script to cope with the change of sensor data structure, generate the DTD dynamically. An it also adapt the AJAX(Asynchronous JavaScript and XML) for XML data parsing, it can support mass data transmission and exception processing for data loss and damage. This technique shows the result of recovery time is decreased about 44.8ms in case of temporary data failure by comparing to the conventional XML method.

• Proceedings of the Korea Contents Association Conference
• /
• 2006.11a
• /
• pp.469-473
• /
• 2006

Nowadays, to realize ubiquitous computing environment, many research activities have been going on within various kinds of research domains including automatic identification, sensor network, home network, telematics and so on. Especially, RFID middle-ware that supports the aggregation of RFID tag data, control and management, and the integration with legacy systems has recently gained a lot of attention. Meanwhile, EPCglobal defined an ALE(Application Level Events) standard specification, which exists between RFID readers and applications, and substitutes the previous systems called Savant. In the specification internal structures and implementation technologies of ALE are not mentioned and only external interfaces are defined. This approach easies the verification of standard compliance and inter-operability of the layer. In this paper, we present the design of ALE-compliant RFID middle-ware systems that process RFID tag data efficiently.