KR970072740A - Open Loop Power Control Method in CDMA Cellular System - Google Patents

Open Loop Power Control Method in CDMA Cellular System Download PDF

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Publication number
KR970072740A
KR970072740A KR1019960012714A KR19960012714A KR970072740A KR 970072740 A KR970072740 A KR 970072740A KR 1019960012714 A KR1019960012714 A KR 1019960012714A KR 19960012714 A KR19960012714 A KR 19960012714A KR 970072740 A KR970072740 A KR 970072740A
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KR
South Korea
Prior art keywords
power control
open loop
loop power
cellular system
base station
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KR1019960012714A
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Korean (ko)
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KR100205047B1 (en
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신성문
이헌
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양승택
한국전자통신연구원
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Priority to KR1019960012714A priority Critical patent/KR100205047B1/en
Publication of KR970072740A publication Critical patent/KR970072740A/en
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Publication of KR100205047B1 publication Critical patent/KR100205047B1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/06—TPC algorithms
    • H04W52/10—Open loop power control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/06—TPC algorithms
    • H04W52/14—Separate analysis of uplink or downlink
    • H04W52/146—Uplink power control

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

본 발명은 CDMA(Code Division Multiple Access) 셀룰라 시스템에서의 개방루프 전력제어방법에 관한 것으로서, 종래 기술에서는 개방루프 전력제어 상수를 셀의 크기에 상관없이 고정시켜 놓으므로써 기지국의 수신 신호세기가 일정치 않았고, 또한 역방향링크의 용량을 감소시키는 문제점이 있었다. 이를 해결하기 위한 본 발명은 CDMA 셀룰라 시스템에서의 개방루프 전력 제어상수를 셀마다 변경시키면서 단말기에서 기지국으로 보내는 출력신호세기를 조절함으로써 기지국의 수신신호세기를 일정하게 한다. 이때, 그 개방루프 전력제어상수는 단말기가 호를 시작할 대 또는 핸드오프 할 때 기지국에서 전송하는 응답 메세지에 하나의 파라메타로 포함시켜 전송된다. 따라서, 본 발명은 CDMA 셀룰라 시스템에서 기지국의 수신신호세기가 일정하고, 역방향 링크의 용량을 증대시킬 수 있고, 그에 따라 경제적인 CDMA 셀룰라 시스템을 구현할 수가 있는 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an open loop power control method in a CDMA (Code Division Multiple Access) cellular system. In the prior art, since the open loop power control constant is fixed regardless of the cell size, And there is also a problem of reducing the capacity of the reverse link. In order to solve this problem, an open loop power control constant in a CDMA cellular system is changed for each cell, and the strength of an output signal transmitted from a mobile station to a base station is adjusted so that the received signal strength of the base station is made constant. At this time, the open loop power control constant is included as one parameter in the response message transmitted from the base station when the terminal starts the call or handoffs. Therefore, in the CDMA cellular system, the strength of the received signal strength of the base station is constant and the capacity of the reverse link can be increased, thereby realizing an economical CDMA cellular system.

Description

씨디엠에이(CDMA) 셀룰라 시스템에서의 개방루프 전력제어방법Open Loop Power Control Method in CDMA Cellular System

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is a trivial issue, I did not include the contents of the text.

제2도는 본 발명의 개방 루프 전력제어방법을 위한 CDMA 셀룰라 시스템의 개략적 구성도, 제3도는 개방 루프 전력제어를 구현하기 위한 단말기와 기지국간의 송수신 신호 흐름도로서, (a)는 발신호일 경우, (b)는 착신호일 경우, (c)는 핸드오프일 경우에 전력제어상수를 전송하는 신호 흐름을 나타낸 것이다.FIG. 2 is a schematic diagram of a CDMA cellular system for an open loop power control method of the present invention. FIG. 3 is a flow chart of a transmission / reception signal between a terminal and a base station for implementing open loop power control. b) is the incoming call, and (c) is the signal flow for transmitting the power control constant in case of handoff.

Claims (5)

CDMA 셀룰라 시스템에서의 개방루프 전력제어상수를 셀마다 변경시키면서 단말기에서 기지국으로 보내는 출력 신호세기를 조절하는 것을 특징으로 하는 CDMA 셀룰라 시스템에서의 개방루프 전력제어방법.A method for controlling open loop power in a CDMA cellular system, the method comprising: varying an open loop power control constant in a CDMA cellular system for each cell; 제1항에 있어서, 상기 전력제어상수는 기지국의 수신신호세기와 출력신호세기의 합으로서 출력신호세기에 따라 변경시키는 것을 특징으로 하는 CDMA 셀룰라 시스템에서의 개방루프 전력제어방법.The method of claim 1, wherein the power control constant is a sum of a received signal strength and an output signal strength of the base station, and is changed according to an output signal strength. 제1항에 있어서, 상기 개방루프 전력제어상수는 단말기에서 호를 시작할 경우에 기지국으로부터의 첫번째 응답신호내에 포함되어 전송하는 것을 특징으로 하는 CDMA 셀룰라 시스템에서의 개방루프 전력제어방법.2. The method of claim 1, wherein the open loop power control constant is included in the first response signal from the base station when the call is initiated at the terminal. 제1항에 있어서, 상기 개방루프 전력제어상수는 셀이 변경되는 핸드오프일 경우에 기지국으로부터의 핸드오프 메세지에 포함되어 전송하는 것을 특징으로 하는 CDMA 셀룰라 시스템에서의 개방루프 전력제어방법.2. The method of claim 1, wherein the open loop power control constant is included in a handoff message from a base station when the handoff is a cell change. 제4항에 있어서, 상기 개방루프 전력제어상수는 목적지 셀의 기지국의 전력제어수단인 것을 특징으로 하는 CDMA 셀룰라 시스템에서의 개방루프 전력제어방법.5. The method of claim 4, wherein the open loop power control constant is the power control means of the base station of the destination cell. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: It is disclosed by the contents of the first application.
KR1019960012714A 1996-04-24 1996-04-24 Open loop power control method in cdma cellular system KR100205047B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019960012714A KR100205047B1 (en) 1996-04-24 1996-04-24 Open loop power control method in cdma cellular system

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Application Number Priority Date Filing Date Title
KR1019960012714A KR100205047B1 (en) 1996-04-24 1996-04-24 Open loop power control method in cdma cellular system

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KR970072740A true KR970072740A (en) 1997-11-07
KR100205047B1 KR100205047B1 (en) 1999-06-15

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US6545994B2 (en) * 2000-02-23 2003-04-08 Tantivy Communications, Inc. Access probe acknowledgment including collision detection to avoid oversetting initial power level

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