서지주요정보
Qos Guaranteed access control scheme in CDMA cellular systems = CDMA 셀룰러 이동통신 시스템에서의 QoS를 보장하는 무선자원 관리에 관한 연구
서명 / 저자 Qos Guaranteed access control scheme in CDMA cellular systems = CDMA 셀룰러 이동통신 시스템에서의 QoS를 보장하는 무선자원 관리에 관한 연구 / Suk-Yon Kang.
저자명 Kang, Suk-Yon ; 강석연
발행사항 [대전 : 한국과학기술원, 2003].
Online Access 원문보기 원문인쇄

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등록번호

8014443

소장위치/청구기호

학술문화관(문화관) 보존서고

DGSM 03002

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9009509

소장위치/청구기호

서울 학위논문 서가

DGSM 03002 c. 2

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초록정보

The introduction of cellular telephone service was followed by a rapid increase in demand for cellular service and is now leading to a shortage of bandwidth in many regions of the country. Further more, the mobile radio systems are being expected to provide multiple services with different characteristics such as handoff and new calls, voice and packet data calls. These have generated some technical challenges to be over come, among them the call control of a variety of call types have been becoming critical procedures for the spectrum-efficient design and operation in mobile radio networks. Furthermore, increasing demand for wireless Internet services makes it necessary that the service providers is to design a new system and network as efficient as possible. 1xEV technology provides a cost effective and high performance and solution for typical users and system providers. It offers high-speed packet data to mobile users, which overlays with CDMA networks and is optimized for packet data networks. The introduction of cellular telephone service was followed by a rapid increase in demand for cellular service and is now leading to a shortage of bandwidth in many regions of the country. Further more, the mobile radio systems are being expected to provide multiple services with different characteristics such as handoff and new calls, voice and packet data calls. These have generated some technical challenges to be over come, among them the call control of a variety of call types have been becoming critical procedures for the spectrum-efficient design and operation in mobile radio networks. Furthermore, increasing demand for wireless Internet services makes it necessary that the service providers is to design a new system and network as efficient as possible. 1xEV technology provides a cost effective and high performance and solution for typical users and system providers. It offers high-speed packet data to mobile users, which overlays with CDMA networks and is optimized for packet data networks. First, we considers a call control policy at a cell, which gives priority to handoff calls over new calls while meeting the overall call quality for a CDMA system with a single carrier. New calls are first under the access control of the threshold type, and then receive services together with the handoffed calls but under the outage restriction guaranteeing a prespecified call quality. An optimization model with such quality-guaranteeing constraints is formulated, which is to determine the threshold value for each cell, minimizing the new call blocking probability. A solution heuristic is proposed, with which a number of test runs are conducted under two different traffic environments. The results reveal the usefulness of our control scheme in that handoff calls are given an appropriate level of priority over new calls while the system capacity is effectively utilized. Next, delay-sensitive scheduling algorithm for packet data calls over 1x EV-DO downlink is proposed. Based on a delay-sensitive scheduling, which mechanism is dividing the packets into time slots during the given time span, we introduce realistic system parameters such as backlog delay and average throughput, and then propose a distributed scheduling algorithm which guarantees the transmission within delay bound. The performance of which is extensively tested with realistic input data. The results are found convincingly affirmative for its practical applicability.

서지기타정보

서지기타정보
청구기호 {DGSM 03002
형태사항 vi, 69 p. : 삽도 26 cm
언어 영어
일반주기 Appendix : A.1, Proof of state-condensing
저자명의 한글표기 : 강석연
지도교수의 영문표기 : Dong-Wan Tcha
지도교수의 한글표기 : 차동완
수록잡지명 : "A load analysis of the soft handoff scheme in a CDMA cellluar system". IEEE journal on selected areas in communications, v.19 no.6, pp. 1147-1152 (2001)
학위논문 학위논문(박사) - 한국과학기술원 : 경영공학전공,
서지주기 Reference : p. 61-64
주제 CDMA
Optimization
Queuing
Integer Programing
packet data
이동통신
최적화이론
무선자원관리
데이터통신
정보통신
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