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Multi - Service 지원을 위한 HDR의 MAC Protocol
김기천,이은경 에스케이텔레콤 (주) 2000 Telecommunications Review Vol.10 No.6
최근 다양해져 가는 multimedia contents를 Mobile Network상에서 서비스하기 위한 노력이 각종 표준화기구에서 이루어지고 있다. 본 논문에서는 고속 무선 통신 기술인 HDR(High Data Rate)이 효율적이고 신뢰성있는 서비스를 제공하기 위해 사용하는 Medium Access Control Protocol을 분석해보고 다양한 서비스를 지원함에 있어 개별적인 서비스의 품질(Quality of Service)을 보장하기 위한 방안과 전송효율을 높이는 방안을 제시한다.
하퇴부 절단술 후 육안적으로 발견하기 어려운 난치성 신경종 처치: 증례 보고
김기천,신성기,노영주,김종규 대한족부족관절학회 2019 대한족부족관절학회지 Vol.23 No.4
Symptomatic neuromas after amputation can be troublesome to treat and make it difficult to properly fit a brace. Surgical management is required when conservative management such as prosthetic socket modification or local injections fail. However, small cutaneous nerves adhere to adjacent soft tissue and they are difficult to locate. The authors suggest that ultrasonography guided tattoo localization using a charcoal suspension is useful to find a visually indistinguishable neuroma.
무선데이터 통신을 위한 IWF(Interworking Function)설계 연구
김기천 건국대학교 산업기술연구원 1998 건국기술연구논문지 Vol.23 No.-
Since 1980's, the need for the wireless service has been rapidly grown. Even in the data communication area, similar to the voice communication, because of the mobility that can be provided by the wireless service, the users can enjoy the convenience of the wireless communications. Wireless communication can be applied to various services such as the file transfer, voice mail arrival notice, remote credit check, etc. In this paper, I propose a way to design a Interworking Function to provide a wireless data service using the already existing cellular network.
Flow Aggregation of Rate Controlled Round-Robin Scheduler
김기천 한국전자통신연구원 2004 ETRI Journal Vol.26 No.4
Flow aggregation is a scalable method to provide quality of service (QoS) guarantees to a large number of flows economically. A round-robin scheduler is an efficient scheduling algorithm. We investigate flow aggregation using a round-robin scheduler and propose the use of periodic timer interrupts for rate control of the roundrobin scheduler. The proposed flow aggregator is a singlestage scheduler compared to Cobb’s two-stage flow aggregator consisting of an aggregator and nonaggregating scheduler. It is possible to implement flow aggregation in the existing routers with only a software upgrade. We also present a simulation study showing the delay behaviors of the proposed algorithm.