KR950026286A - Soft Handoff Method in Mobile Communication System - Google Patents

Soft Handoff Method in Mobile Communication System Download PDF

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Publication number
KR950026286A
KR950026286A KR1019940002968A KR19940002968A KR950026286A KR 950026286 A KR950026286 A KR 950026286A KR 1019940002968 A KR1019940002968 A KR 1019940002968A KR 19940002968 A KR19940002968 A KR 19940002968A KR 950026286 A KR950026286 A KR 950026286A
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KR
South Korea
Prior art keywords
base station
channel
traffic channel
signal strength
mobile communication
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Application number
KR1019940002968A
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Korean (ko)
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KR960009459B1 (en
Inventor
임윤구
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구자홍
엘지전자 주식회사
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Priority to KR94002968A priority Critical patent/KR960009459B1/en
Publication of KR950026286A publication Critical patent/KR950026286A/en
Application granted granted Critical
Publication of KR960009459B1 publication Critical patent/KR960009459B1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/16—Performing reselection for specific purposes
    • H04W36/18—Performing reselection for specific purposes for allowing seamless reselection, e.g. soft reselection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

Abstract

본 발명은 하프레이트 TDMA 이동통신의 소프트 핸드오프 방법에 관한 것으로서, 디지탈 방식의 듀얼 모드 단말기가 통화줄 셀 경게지역에 이르러 핸드오프에 의한 통화의 일시적인 중단을 방지하도록 한 것이다.The present invention relates to a soft handoff method for half-rate TDMA mobile communication, in which a digital dual mode terminal reaches a call line cell alert area to prevent temporary interruption of a call due to handoff.

이와 같은 본 발명의 목적은 하프레이즈 TDMA 이동 통신 시스템의 단말기가 셀 경계지역에 이르러 핸드오프 발생시 각 기지국 모두로부터 트래픽 채널을 동시에 수신하여 각 신호의 통화 품질을 측정하는 과정과, 상기 통화 품질 측정 결과 신호세기가 설정된 임계치를 초과한 기지국의 신호를 선택하는 과정과, 상기 기지국 선택후 측정한 구 기지국의 트래픽 채널 신호세기가 하한 설정 임계치보다 낮을 경우 상기 구 기지국의 트래픽 채널을 끊는 과정으로 이루어짐으로써 달성되는 것이다.The object of the present invention is to measure the call quality of each signal by receiving a traffic channel from each base station at the same time when the terminal of the half-raised TDMA mobile communication system reaches the cell boundary area and handoff occurs, and the call quality measurement result This is achieved by selecting a signal of a base station whose signal strength exceeds a set threshold, and cutting off the traffic channel of the old base station when the traffic channel signal strength of the old base station measured after the base station selection is lower than a lower limit setting threshold. Will be.

Description

이동통신 시스템의 소프트 핸드오프 방법Soft Handoff Method in Mobile Communication System

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제3도는 본 발명 이동 통신 시스템의 소프트 핸드오프 장치 구성도,3 is a configuration diagram of a soft handoff device of a mobile communication system of the present invention;

제4도는 각 기지국의 송수신 채널 구성도.4 is a transmission and reception channel configuration diagram of each base station.

Claims (3)

하프레이트 TDMA 이동 통신 시스템의 단말기가 셀 경계지역에 이르러 핸드오프 발생시 각 기지국 모두로부터 트래픽 채널을 동시에 수신하여 각 신호의 통화 품질을 측정하는 과정과, 상기 송수신 신호세기 측정 결과 신호세기가 설정된 임계치를 초과한 기지국의 신호를 선택하는 과정과, 상기 기지국 선택후 측정한 구 기지국의 트래픽 채널 신호세기가 하한 설정 임계치보다 낮을 경우 상기 구 기지국의 트래픽 채널을 끊는 과정으로 이루어짐을 특징으로 한 이동 통신 시스템의 소프트 핸드 오프 방법.A terminal of a half-rate TDMA mobile communication system receives a traffic channel from each base station at the same time when a handoff occurs and reaches a cell boundary, and measures the call quality of each signal. Selecting a signal of an excess base station; and if the traffic channel signal strength of the old base station measured after the base station selection is lower than a lower limit setting threshold, disconnecting the traffic channel of the old base station. Soft hand off way. 제1항에 있어서, 각 기지국의 트래픽 채널 통화품질 측정과정은 단말기가 할당받은 송수신 RF 채널과 타임 슬롯에 의해 기지국 "A"와 송수신 및 수신신호 세기를 측정하는 단계와, 상기 송수신 및 수신신호 세기측정후 빈 타임슬롯 기간동안에 신 기지국 "B"의 채널에 동조하여 수신신호 강도를 측정하는 단계로 이루어짐을 특징으로 한 이동통신 시스템의 소프트 핸드오프 방법.The method of claim 1, wherein the traffic channel call quality measurement process of each base station comprises: measuring transmission and reception signal strength with the base station " A " based on the transmission and reception RF channel and time slot allocated by the terminal; And measuring the received signal strength by tuning to the channel of the new base station " B " during the empty timeslot period after the measurement. 제1항에 있어서, 기지국의 신호 선택과정은 측정한 각 기지국의 신호 세기를 비교하여 인접 기지국의 신호세기가 설정된 임계치를 초과하면 이동통신 교환국에서 신호세기 측정 정보를 송출하는 단계와, 상기 신호세기 측정 정보를 수신한 이동통신 교환국에서 소프트 핸드오프의 수행을 결정하는 단계와, 상기 소프트 핸드오프 수행 결정에 의해 핸드오프 가능한 기지국에 RF 채널 설정을 지시하는 단계와, 상기 RF 채널 설정을 지시받은 기지국에의해 단말기의 빈 타임슬롯 기간이 있는 RF 채널을 설정하는 단계와, 이동통신 교환국에 의해 단말기가 각 기지국의 트래픽 채널을 동시에 수신하도록 정보를 송출하는 단계와, 단말기에 의해 구 기지국의 할당 RF 채널에 동조하여 수신하고 신 기지국의 나머지 빈 타임슬롯 기간동안에 신 기지국의 RF 채널과 타임슬롯에 동조하여 수신하는 단계로 이루어짐을 특징으로 한 이동통신 시스템의 소프트 핸드오프 방법.The method of claim 1, wherein the signal selection process of the base station compares the measured signal strengths of the respective base stations and transmits signal strength measurement information from the mobile communication switching station when the signal strength of the neighboring base station exceeds a set threshold; Determining, by the mobile telecommunication switching center, receiving the measurement information, performing soft handoff; instructing a base station capable of handoff by the soft handoff performance decision; and setting up an RF channel. Setting an RF channel with an empty timeslot period of the terminal by the terminal, transmitting information by the mobile switching center to simultaneously receive the traffic channel of each base station, and assigning the RF channel of the old base station by the terminal; Tunes to and receives the RF channel of the new base station during the remaining empty timeslots of the new base station. Soft hand-off method of the slot being a mobile communication system, characterized by made of an receiving and tuning on. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR94002968A 1994-02-19 1994-02-19 Soft hand-off KR960009459B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR94002968A KR960009459B1 (en) 1994-02-19 1994-02-19 Soft hand-off

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Application Number Priority Date Filing Date Title
KR94002968A KR960009459B1 (en) 1994-02-19 1994-02-19 Soft hand-off

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KR950026286A true KR950026286A (en) 1995-09-18
KR960009459B1 KR960009459B1 (en) 1996-07-19

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Publication number Priority date Publication date Assignee Title
JP3691975B2 (en) * 1998-12-28 2005-09-07 株式会社東芝 CDMA mobile radio terminal device
KR101654934B1 (en) * 2009-10-31 2016-09-23 삼성전자주식회사 Visible communication method and apparatus

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