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KR960020199A - Method for Determining CDMA-TO-CDMA Heterogeneous Frequency Handoff Point in CDMA Cellular Phone System - Google Patents

Method for Determining CDMA-TO-CDMA Heterogeneous Frequency Handoff Point in CDMA Cellular Phone System Download PDF

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Publication number
KR960020199A
KR960020199A KR1019940030103A KR19940030103A KR960020199A KR 960020199 A KR960020199 A KR 960020199A KR 1019940030103 A KR1019940030103 A KR 1019940030103A KR 19940030103 A KR19940030103 A KR 19940030103A KR 960020199 A KR960020199 A KR 960020199A
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South Korea
Prior art keywords
cdma
mobile station
control signal
received
threshold
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KR1019940030103A
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Korean (ko)
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KR970011695B1 (en
Inventor
조병진
정종태
이동욱
정재욱
정영균
Original Assignee
양승택
재단법인 한국전자통신연구소
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Priority to KR1019940030103A priority Critical patent/KR970011695B1/en
Publication of KR960020199A publication Critical patent/KR960020199A/en
Application granted granted Critical
Publication of KR970011695B1 publication Critical patent/KR970011695B1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H04B7/2628—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using code-division multiple access [CDMA] or spread spectrum multiple access [SSMA]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/06—Reselecting a communication resource in the serving access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H04W36/302—Reselection being triggered by specific parameters by measured or perceived connection quality data due to low signal strength
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports

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

Abstract

본 발명은 코드분할 다중억세스 방식의 셀룰라 시스템에서 주파수가 각각 다른 기지국간을 이동하는 이동국에서의 핸드오프 시점결정 방법에 관한 것으로, 임의의 이동국과 통신중인 기지국에서 해당 이동국으로부터 수신되는 신호의 세기를 미리 설정되어 있는 임계치와 지속적으로 비교하는 제1과정과, 상기 과정에서 수신신호의 세기가 임계치 이하로 떨어지는 경우 해당 이동국에 수신되는 신호의 세기를 측정하도록 제어신호를 송출하는 제2과정과, 상기 과정에서 송출되어진 제어신호를 입력받은 이동국은 미리 설정되어 있는 임계치와 상기 제어신호의 수신 세기를 비교하는 제3과정 및 상기 과정에서 제어신호의 수신 세기가 임계치 이하로 떨어지는 경우 해당 기지국에 핸드오프 시점임을 통보하는 제4과정을 포함하는 것을 특징으로 하는 CDMA 방식의 셀룰라폰 시스템에서 CDMA-TO-CDMA 이종주파수 핸드오프 시점결정 방법을 제공하여 비싼 부수장비가 필요없이도 기지국의 서비스영역을 유지할 수 있는 효과가 있다.The present invention relates to a method for determining a handoff timing in a mobile station that moves between base stations having different frequencies in a code division multiple access cellular system. The present invention relates to a method of determining the strength of a signal received from a mobile station in a base station communicating with a mobile station. A first step of continuously comparing with a preset threshold value, a second step of transmitting a control signal to measure the strength of a signal received at a corresponding mobile station when the strength of the received signal falls below a threshold value; The mobile station receiving the control signal transmitted in the process may include a third process of comparing the received intensity of the control signal with a preset threshold value, and when the received intensity of the control signal falls below the threshold in the process, the handoff time point to the corresponding base station. CDM comprising a fourth process for notifying that By providing a CDMA-TO-CDMA hetero-frequency handoff timing determination method in the A-type cellular phone system, the service area of the base station can be maintained without the need for expensive additional equipment.

Description

CDMA 방식의 셀룰라폰 시스템에서 CDMA-TO-CDMA이종 주파수 핸드오프 시점 결정 방법Method for Determining CDMA-TO-CDMA Heterogeneous Frequency Handoff Point in CDMA Cellular System

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제2도는 본 발명에 따른 이종 주파수 핸드오프 시점결정 방법을 설명하기 위한 신호 흐름도,2 is a signal flow diagram illustrating a method for determining a heterogeneous frequency handoff timing according to the present invention;

제3도는 제2도에서 설명된 방식과 다른 본 발명에 따른 핸드오프 시점결정 방법을 설명하기 위한 신호 흐름도.3 is a signal flow diagram for explaining a handoff timing determination method according to the present invention different from the method described in FIG.

Claims (2)

코드분할 다중액세스 방식의 셀룰라 시스템에서 주파수가 각각 다른 기지국간을 이동하는 이동국에서의 핸드오프 시점결정 방법에 있어서, 임의의 이동국과 통신중인 기지국에서 해당 이동국으로부터 수신되는 신호의 세기를 미리 설정되어 있는 임계치와 지속적으로 비교하는 제1과정과; 상기 과정에서 수신 신호의 세기가 임계치 이하로 떨어지는 경우 해당 이동국에 수신되는 신호의 세기를 측정하도록 제어신호를 송출하는 제2과정과; 상기 과정에서 송출되어진 제어신호를 입력받은 이동국은 미리 설정되어 있는 임계치와 상기 제어신호의 수신 세기를 비교하는 제3과정; 및 상기 과정에서 제어신호의 수신 세기가 임계치 이하로 떨어지는 경우 해당 기지국에 핸드오프 시점임을 통보하는 제4과정을 포함하는 것을 특징으로 하는 CDMA 방식의 셀룰라폰 시스템에서 CDMA-TO-CDMA 이종주파수 핸드오프 시점결정 방법.A method for determining handoff timing in a mobile station that moves between base stations having different frequencies in a code division multiple access cellular system, wherein the strength of a signal received from the mobile station at a base station communicating with any mobile station is preset. A first process of continuously comparing with a threshold; A second step of transmitting a control signal to measure the strength of a signal received by a corresponding mobile station when the strength of the received signal falls below a threshold in the above process; A third step of the mobile station receiving the control signal sent out in the process, comparing a received threshold of the control signal with a preset threshold; And a fourth process of notifying a corresponding base station of the handoff time when the reception strength of the control signal falls below a threshold in the process. CDMA-TO-CDMA heterogeneous frequency handoff in a CDMA cellular phone system How to determine timing. 코드분할 다중억세스 방식의 셀룰라 시스템에서 주파수가 각각 다른 기지국간을 이동하는 이동국에서의 핸드오프 시점결정 방법에 있어서, 임의의 이동국과 통신중인 기지국에서 통신중인 해당 이동국에게 일정시간 간격으로 미리 설정되어 있는 프레임 오율(誤率) 임계값을 송출하는 제1과정과; 해당 이동국이 상기 과정에서 송출되어진 임계값을 수신하면, 수신되는 통신신호의 프레임 오율을 상기 임계값과 비교하는 제2과정과; 상기 과정에서 비교되어진 비교치를 상기 기지국에 통보하는 제3과정; 및 상기 기지국은 상기 과정에서 통보되어지는 비교치가 통신신호의 프레임 오율이 상기 프레임 오율 임계값보다 큰 경우로 나타나면 핸드오프 시점이 되었다고 판단하는 제4과정을 포함하는 것을 특징으로 하는 CDMA 방식의 셀룰라폰 시스템에서 CDMA-TO-CDMA 방식의 셀룰라폰 시스템에서 CDMA-TO-CDMA 이종주파수 핸드오프 시점결정 방법.A method for determining a handoff timing in a mobile station that moves between base stations having different frequencies in a code division multiple access cellular system, wherein a predetermined time interval is predetermined for a corresponding mobile station communicating from a base station communicating with any mobile station. Transmitting a frame error rate threshold value; A second step of, when the mobile station receives the threshold value transmitted in the process, comparing the frame error rate of the received communication signal with the threshold value; A third step of notifying the base station of the comparison value compared in the step; And a fourth step of determining, by the base station, if the comparison value notified in the process is a case where the frame error rate of the communication signal is greater than the frame error rate threshold, the handoff time has been reached. CDMA-TO-CDMA heterofrequency handoff timing determination method in a CDMA-TO-CDMA cell phone system. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019940030103A 1994-11-16 1994-11-16 Timing decision method of frequency handoff in cdma mobile communication system KR970011695B1 (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100272796B1 (en) * 1998-03-18 2000-11-15 김영환 Method fora searching neighbor cell pilot of mobile station in mobile communication systme
WO2001067641A1 (en) * 2000-03-10 2001-09-13 Samsung Electronics Co., Ltd Power control apparatus and method in a wireless communication system using scheduled packet data service channel
KR100367410B1 (en) * 1999-08-04 2003-01-10 학교법인 한국정보통신학원 Method for reducing time latency in handover procedure
KR100791156B1 (en) * 2000-05-19 2008-01-02 알까뗄 루슨트 How to Signal Compression Mode Parameters to a Mobile Station

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100272796B1 (en) * 1998-03-18 2000-11-15 김영환 Method fora searching neighbor cell pilot of mobile station in mobile communication systme
KR100367410B1 (en) * 1999-08-04 2003-01-10 학교법인 한국정보통신학원 Method for reducing time latency in handover procedure
WO2001067641A1 (en) * 2000-03-10 2001-09-13 Samsung Electronics Co., Ltd Power control apparatus and method in a wireless communication system using scheduled packet data service channel
KR100791156B1 (en) * 2000-05-19 2008-01-02 알까뗄 루슨트 How to Signal Compression Mode Parameters to a Mobile Station

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