[go: up one dir, main page]

KR970063982A - A Cell Access Method Using Two Pilot Channels in a Quasi-Synchronous Code Division Multiple Access (CDMA) System - Google Patents

A Cell Access Method Using Two Pilot Channels in a Quasi-Synchronous Code Division Multiple Access (CDMA) System Download PDF

Info

Publication number
KR970063982A
KR970063982A KR1019960004398A KR19960004398A KR970063982A KR 970063982 A KR970063982 A KR 970063982A KR 1019960004398 A KR1019960004398 A KR 1019960004398A KR 19960004398 A KR19960004398 A KR 19960004398A KR 970063982 A KR970063982 A KR 970063982A
Authority
KR
South Korea
Prior art keywords
cell
cluster
pilot
synchronization
pilot sequence
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
KR1019960004398A
Other languages
Korean (ko)
Other versions
KR100233252B1 (en
Inventor
홍인기
이태영
최안나
안병철
박용완
류승문
Original Assignee
서정욱
한국이동통신 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 서정욱, 한국이동통신 주식회사 filed Critical 서정욱
Priority to KR1019960004398A priority Critical patent/KR100233252B1/en
Priority to US08/803,995 priority patent/US6205132B1/en
Priority to CN97109989A priority patent/CN1094704C/en
Priority to JP3913397A priority patent/JP3031874B2/en
Publication of KR970063982A publication Critical patent/KR970063982A/en
Priority to HK98102930.2A priority patent/HK1003705B/en
Application granted granted Critical
Publication of KR100233252B1 publication Critical patent/KR100233252B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H04B1/7073—Synchronisation aspects
    • H04B1/7083—Cell search, e.g. using a three-step approach
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2201/00—Indexing scheme relating to details of transmission systems not covered by a single group of H04B3/00 - H04B13/00
    • H04B2201/69—Orthogonal indexing scheme relating to spread spectrum techniques in general
    • H04B2201/707—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation
    • H04B2201/70701—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation featuring pilot assisted reception

Landscapes

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

Abstract

본 발명은 준동기 방식으로 동작하는 코드 분할 다중 접속 시스템(CDMA)에서 두개의 파일럿 채널을 사용하여 초기 동기를 획득하는 셀 접속 방법에 관한 것으로, 기지국 구분용으로 다수의 시퀀스를 사용하여 간단한 셀 계획이 가능하도록 하면서도 빠른 초기 동기를 획득하기 위하여 두개의 파일럿 채널을 사용하는 셀 접속 방법을 제공하기 위하여, 기지국 제어기가 상기 다수의 기지국에 동기 신호를 전송하는 제1단계; 이동국은 두 개의 파일럿 채널 중 하나의 채널을 사용하는 클러스터 파일럿에 동기를 설정하는 제2단계; 및 상기 이동국은 기설정된 상기 클러스터 동기 채널을 통하여 상기 두개의 파일럿 채널중 다른 하나의 채널을 사용하는 셀 파일럿에 동기를 설정하는 제3단계를 포함하여 GPS와 같은 고가 장비를 사용하지 않아도 되므로 기지국 설치 비용을 줄일수 있고,GPS를 사용할 수 없는 실내나 지하 환경에서도 사용이 가능하고, GPS등의 외부 시스템과 독립적으로 운용할 수 있는 효과가 있다.The present invention relates to a cell access method for acquiring initial synchronization using two pilot channels in a quasi-synchronous code division multiple access (CDMA) system, A first step in which a base station controller transmits a synchronization signal to the plurality of base stations in order to provide a cell access method using two pilot channels in order to acquire a fast initial synchronization while allowing the base station controller to perform fast initial synchronization; A second step of the mobile station establishing synchronization with a cluster pilot using one of the two pilot channels; And a third step of establishing synchronization with a cell pilot using another channel among the two pilot channels through the predetermined cluster synchronization channel, so that the mobile station does not need to use expensive equipment such as GPS, It is possible to use the system in an indoor or underground environment where GPS can not be used, and to operate independently from an external system such as GPS.

Description

준동기 방식의 코드 분할 다중접속 시스템(CDMA)에서 두개의 파일럿 채널을 이용한 셀 접속 방법A Cell Access Method Using Two Pilot Channels in a Quasi-Synchronous Code Division Multiple Access (CDMA) System

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

제4도는 본 발명이 적용되는 코드 분할 다중 접속 시스템의 기지국 구성도.FIG. 4 is a block diagram of a base station of a code division multiple access system to which the present invention is applied; FIG.

제5도는 두개의 파일럿을 이용하는 경우에 코드 분할 다중 시스템의 셀 구조도.FIG. 5 illustrates a cell structure of a code division multiple access system using two pilots. FIG.

Claims (10)

코드 분할 다중 접속 시스템(CDMA)의 기지국을 서로 다른 시퀀스를 통하여 구분하는 셀 접속방법에 있어서, 기지국 제어기가 상기 다수의 기지국에 동기 신호를 전송하는 제1단계; 이동국은 두개의 파일럿 채널 중 하나의 채널을 클러스터 파일럿으로 사용하되, 상기 클러스터 파일럿에 동기를 설정하는 제2단계; 및 상기 두개의 파일럿 채널 중 다른 하나의 채널을 셀 파일럿으로 사용하되, 상기 이동국은 기설정된 상기 클러스터 동기 채널을 통하여 상기 셀 파일럿에 동기를 설정하는 제3단계를 포함하는 것을 특징으로 하는 셀 접속방법.A cell access method for classifying base stations of a code division multiple access system (CDMA) through different sequences, the method comprising: a first step of a base station controller transmitting a synchronization signal to the plurality of base stations; A second step of using a channel of one of the two pilot channels as a cluster pilot, and establishing synchronization with the cluster pilot; And a third step of using the other one of the two pilot channels as a cell pilot, wherein the mobile station sets a synchronization to the cell pilot through the predetermined cluster synchronization channel . 코드 분할 다중 접속 시스템(CDMA)의 셀 구조가 다층 셀 구조인 경우에 기지국을 서로 다른 시퀀스를 통하여 구분하는 셀 접속방법에 있어서, 기지국 제어기가 상기 다수의 기지국에 동기 신호를 전송하는 제1단계; 이동국이 클러스터 파일럿 시퀀스를 탐색하여 수신기 출력이 소정의 값보다 크면 현 동기 시점을 기준으로 다른 클러스터 파일럿 시퀀스를 탐색한 후에 그중 최대 출력을 나타내는 클러스터 파일럿 시퀀스에 클러스터 동기를 설정하는 제2단계(61 내지 65); 클러스터 동기 채널을 읽어 셀 파일럿 시퀀스의 종류와 셀 파일럿에 할당된 주파수 대역을 판독하는 제3단계(66); 및 상기 이동국은 클러스터 동기 시점을 기준으로 셀 파일럿시퀀스를 탐색하여 그중 최대 출력을 나타내는 셀 시퀀스에 셀 동기를 설정하는 제4단계(67,68)를 포함하는 것을 특징으로 하는 셀 접속 방법.A cell access method for distinguishing a base station through a different sequence when a cell structure of a code division multiple access system (CDMA) is a multi-layer cell structure, the method comprising: a first step of a base station controller transmitting a synchronization signal to the plurality of base stations; A second step (61 - 61) of searching for another cluster pilot sequence based on the current synchronization point if the mobile station searches for a cluster pilot sequence and if the receiver output is greater than a predetermined value, and then setting cluster synchronization in the cluster pilot sequence indicating the maximum output thereof 65); A third step (66) of reading the cluster synchronization channel and reading the type of the cell pilot sequence and the frequency band allocated to the cell pilot; And a fourth step (67,68) of searching for a cell pilot sequence based on a cluster synchronization point and setting a cell synchronization to a cell sequence indicating a maximum output of the cell pilot sequence. 제2항에 있어서, 상기 수신기 출력값은, 코릴레이터 출력값을 사용하는 것을 특징으로 하는 셀 접속 방법.3. The method of claim 2, wherein the receiver output value uses a correlator output value. 제2항에 잇어서, 상기 소정의 값은, 문턱 전압인 것을 특징으로 하는 셀 접속 방법.The method of claim 2, wherein the predetermined value is a threshold voltage. 클러스터 중앙에서 클러스터 파일럿을 전송하는 경우에 코드 분할 다중 접속시스템(CDMA)의 기지국을 서로 다른 시퀀스를 통하여 구분하는 셀 접속 방법에 있어서, 기지국제어기가 상기 다수의 기지국에 동기 신호를 전송하는 제1단계; 이동국이 클러스터 파일럿 시퀀스를 탐색하여 수신기 출력이 소정의 값보다 크면 현 동기 시점을 기준으로 다른 클러스터 파일럿 시퀀스를 탐색한 후에 그중 최대 출력을 나타내는 클러스터 파일럿 시퀀스에 클러스터 동기를 설정하는 제2단계(71 내지75); 클러스터 동기 채널을 읽어 셀 파일럿 시퀀스의 종류를 판독하는 제3단계(76); 및 상기 이동국은 클러스터 동기 시점을 기준으로 셀 파일럿 시퀀스를 탐색하여 그 중 최대 출력을 나타내는 셀 시퀀스에 셀 동기를 설정하는 제4단계(77,78)를 포함하는 것을 특징으로 하는 셀 접속방법.A cell access method for classifying a base station of a code division multiple access system (CDMA) through different sequences when a cluster pilot is transmitted in the center of a cluster, the method comprising: a first step of a base station controller transmitting a synchronization signal to the plurality of base stations ; A second step of setting cluster synchronization in a cluster pilot sequence indicating a maximum output among the cluster pilot sequences when the mobile station searches for a cluster pilot sequence and searches for another cluster pilot sequence based on the current synchronization point when the receiver output is greater than a predetermined value, 75); A third step (76) of reading the type of the cell pilot sequence by reading the cluster synchronous channel; And a fourth step (77,78) of searching for a cell pilot sequence based on a cluster synchronization point and setting a cell synchronization to a cell sequence indicating a maximum output of the cell pilot sequence. 제5항에 있어서, 상기 수신기 출력값은, 코릴레이터 출력값을 사용하는 것을 특징으로 하는 셀 접속 방법.The method of claim 5, wherein the receiver output value uses a correlator output value. 제5항에 있어서, 상기 소정의 값은, 문턱 전압인 것을 특징으로 하는 셀 접속 방법.6. The method of claim 5, wherein the predetermined value is a threshold voltage. 모든 셀이 클로스터 파일럿과 셀 파일럿을 전송하는 경우에 코드 분할 다중 접속 시스템(CDMA)의 기지국을 서로 다른 시퀀스를 통하여 구분하는 셀 접속 방법에 있어서, 기지국 제어기가 상기 다수의, 기지국에 동기 신호를 전송하는 제1단계; 이동국이 클러스터 파일럿 시퀀스를 탐색하여 최대의 수신기 출력값에 동기 시점을 설정한 후에 현 동기 시점을 기준으로 다른 클러스터 파일럿 시퀀스를 탐색하여 그중 최대 출력을 나타내는 클러스터 파일럿 시퀀스에 클러스터 동기를 설정하는 제2단계(81 내지 85); 클러스터 동기 채널을 읽어 셀 파일럿 시퀀스의 종류를 판독하는 제3단계(86); 및 상기 이동국은 클러스터 동기 시점을 기준으로 셀 파일럿 시퀀스를 탐색하여 그중 최대 출력을 나타내는 셀 시퀀스에 셀 동기를 설정하는 제4단계(87,88)를 포함하는 것을 특징으로 하는 셀 접속 방법.A cell access method for classifying a base station of a code division multiple access system (CDMA) through different sequences when all cells transmit a cluster pilot and a cell pilot, the method comprising the steps of: A first step of transmitting data; A second step of searching for another cluster pilot sequence on the basis of the current synchronization point after the mobile station searches for the cluster pilot sequence and setting the synchronization point to the maximum receiver output value and setting the cluster synchronization in the cluster pilot sequence indicating the maximum output thereof 81 to 85); A third step (86) of reading the type of the cell pilot sequence by reading the cluster synchronous channel; And a fourth step (87,88) of searching for a cell pilot sequence based on a cluster synchronization point and setting a cell synchronization to a cell sequence indicating a maximum output among the search results. 제8항에 있어서, 상기 수신기 출력값은, 코릴레이터 출력값을 사용하는 것을 특징으로 하는 셀 접속 방법.9. The method of claim 8, wherein the receiver output value uses a correlator output value. 제8항에 있어서, 상기 소정의 값은, 문턱 전압인 것을 특징으로 하는 셀 접속 방법.The cell connecting method according to claim 8, wherein the predetermined value is a threshold voltage. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: It is disclosed by the contents of the first application.
KR1019960004398A 1996-02-22 1996-02-22 Cell access method in code division multiple access system for distinguishing base stations through different sequences Expired - Lifetime KR100233252B1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
KR1019960004398A KR100233252B1 (en) 1996-02-22 1996-02-22 Cell access method in code division multiple access system for distinguishing base stations through different sequences
US08/803,995 US6205132B1 (en) 1996-02-22 1997-02-21 Method for accessing a cell using two pilot channels in a CDMA communication system of an asynchronous or quasi-synchronous mode
CN97109989A CN1094704C (en) 1996-02-22 1997-02-22 Method for accessing cell using two pilot channels in CDMA communication system of asynchronous or quasi-synchronous mode
JP3913397A JP3031874B2 (en) 1996-02-22 1997-02-24 Cell connection method using two pilot channels
HK98102930.2A HK1003705B (en) 1996-02-22 1998-04-08 A method for accessing a cell using two pilot channels in a cdma communication system of an asynchronous or quasi-synchronous mode

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019960004398A KR100233252B1 (en) 1996-02-22 1996-02-22 Cell access method in code division multiple access system for distinguishing base stations through different sequences

Publications (2)

Publication Number Publication Date
KR970063982A true KR970063982A (en) 1997-09-12
KR100233252B1 KR100233252B1 (en) 1999-12-01

Family

ID=19451682

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019960004398A Expired - Lifetime KR100233252B1 (en) 1996-02-22 1996-02-22 Cell access method in code division multiple access system for distinguishing base stations through different sequences

Country Status (1)

Country Link
KR (1) KR100233252B1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100925271B1 (en) * 2007-12-18 2009-11-05 한국전자통신연구원 Burst gain control device and its method in the shadow area which can move in both directions
KR101259115B1 (en) * 2006-08-14 2013-04-26 엘지전자 주식회사 Sequence Allocation Method, And Method and Apparatus For Transmitting Signal Using The Sequence Allocated Thereby
US9037736B2 (en) 2006-06-09 2015-05-19 Evolved Wireless Llc Method of transmitting data in a mobile communication system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE432602T1 (en) 2005-12-20 2009-06-15 Nokia Siemens Networks Gmbh ESTABLISHING A CONNECTION IN RADIO COMMUNICATION SYSTEMS

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9037736B2 (en) 2006-06-09 2015-05-19 Evolved Wireless Llc Method of transmitting data in a mobile communication system
US9241349B2 (en) 2006-06-09 2016-01-19 Evolved Wireless Llc Method of transmitting data in a mobile communication system
US9560650B2 (en) 2006-06-09 2017-01-31 Evolved Wireless Llc Method of transmitting data in a mobile communication system
US9705624B2 (en) 2006-06-09 2017-07-11 Evolved Wireless Llc Method of transmitting data in a mobile communication system
US9806838B2 (en) 2006-06-09 2017-10-31 Evolved Wireless Llc Method of transmitting data in a mobile communication system
US10659183B2 (en) 2006-06-09 2020-05-19 Evolved Wireless Llc Method of transmitting data in a mobile communication system
US11336385B2 (en) 2006-06-09 2022-05-17 Evolved Wireless Llc Preamble sequence for a random access channel
US12289158B2 (en) 2006-06-09 2025-04-29 Equo Ip Llc Preamble sequence for a random access channel
KR101259115B1 (en) * 2006-08-14 2013-04-26 엘지전자 주식회사 Sequence Allocation Method, And Method and Apparatus For Transmitting Signal Using The Sequence Allocated Thereby
KR100925271B1 (en) * 2007-12-18 2009-11-05 한국전자통신연구원 Burst gain control device and its method in the shadow area which can move in both directions

Also Published As

Publication number Publication date
KR100233252B1 (en) 1999-12-01

Similar Documents

Publication Publication Date Title
US6289007B1 (en) Method for acquiring a cell site station in asynchronous CDMA cellular communication systems
US6731673B1 (en) Synchronization channel with cyclic hierarchical sequences and method for cell site search with low detector complexity
KR970068214A (en) CDMA portable radio transmitter
US6044104A (en) Cell search method and mobile station apparatus
US7289483B1 (en) Cell search apparatus and method in CDMA mobile communication system
KR19990013970A (en) Code division multiple access wireless communication device
KR880012035A (en) Wireless channel search method
CA2244334A1 (en) A channel selection method of a wireless communication system
KR20000028679A (en) Cell searching method in asynchronous wideband code division multiple access system
CN1248831A (en) Range extended concentric community base station
US6205132B1 (en) Method for accessing a cell using two pilot channels in a CDMA communication system of an asynchronous or quasi-synchronous mode
KR100287896B1 (en) Cell Search Method in Mobile Communication System
NO980877D0 (en) Procedure for selecting way to perform a handover, as well as cellular radio system
KR100434262B1 (en) Multi scrambling code generation method for down link
KR20090022082A (en) Mobile communication network and cell discovery method and mobile communication network system for same
WO1998059448A3 (en) Prioritized pilot searching in a code-division multiple access communication system
KR101479591B1 (en) Method and apparatus for searching cell of mobile communication
KR970063982A (en) A Cell Access Method Using Two Pilot Channels in a Quasi-Synchronous Code Division Multiple Access (CDMA) System
KR100622149B1 (en) Apparatus and Method for Acquiring Code Group in Asynchronous Broadband Code Division Multiple Access System
KR100614745B1 (en) Method and apparatus for acquiring code group in asynchronous wide area code division multiple access system using receive diversity
US7453863B2 (en) Cell searching apparatus and method in asynchronous mobile communication system
US6879571B1 (en) Code division multiple access mobile communication system
KR970063980A (en) Cell Access Method Using Two Pilot Channels in Asynchronous Code Division Multiple Access (CDMA)
KR100365786B1 (en) Method for searching neighbor cell in asynchronous mobile communication system
KR20030052092A (en) Small-window-sized preamble search apparatus and method to search preamble signal of terminal

Legal Events

Date Code Title Description
A201 Request for examination
PA0109 Patent application

Patent event code: PA01091R01D

Comment text: Patent Application

Patent event date: 19960223

PA0201 Request for examination

Patent event code: PA02012R01D

Patent event date: 19960223

Comment text: Request for Examination of Application

AMND Amendment
PG1501 Laying open of application
E902 Notification of reason for refusal
PE0902 Notice of grounds for rejection

Comment text: Notification of reason for refusal

Patent event date: 19980825

Patent event code: PE09021S01D

AMND Amendment
E601 Decision to refuse application
PE0601 Decision on rejection of patent

Patent event date: 19990118

Comment text: Decision to Refuse Application

Patent event code: PE06012S01D

Patent event date: 19980825

Comment text: Notification of reason for refusal

Patent event code: PE06011S01I

J201 Request for trial against refusal decision
PJ0201 Trial against decision of rejection

Patent event date: 19990212

Comment text: Request for Trial against Decision on Refusal

Patent event code: PJ02012R01D

Patent event date: 19990118

Comment text: Decision to Refuse Application

Patent event code: PJ02011S01I

Appeal kind category: Appeal against decision to decline refusal

Decision date: 19990807

Appeal identifier: 1999101000561

Request date: 19990212

AMND Amendment
PB0901 Examination by re-examination before a trial

Comment text: Amendment to Specification, etc.

Patent event date: 19990315

Patent event code: PB09011R02I

Comment text: Request for Trial against Decision on Refusal

Patent event date: 19990212

Patent event code: PB09011R01I

Comment text: Amendment to Specification, etc.

Patent event date: 19981224

Patent event code: PB09011R02I

Comment text: Amendment to Specification, etc.

Patent event date: 19970213

Patent event code: PB09011R02I

B601 Maintenance of original decision after re-examination before a trial
PB0601 Maintenance of original decision after re-examination before a trial
PJ1301 Trial decision

Patent event code: PJ13011S01D

Patent event date: 19990811

Comment text: Trial Decision on Objection to Decision on Refusal

Appeal kind category: Appeal against decision to decline refusal

Request date: 19990212

Decision date: 19990807

Appeal identifier: 1999101000561

PS0901 Examination by remand of revocation
S901 Examination by remand of revocation
GRNO Decision to grant (after opposition)
PS0701 Decision of registration after remand of revocation

Patent event date: 19990827

Patent event code: PS07012S01D

Comment text: Decision to Grant Registration

Patent event date: 19990811

Patent event code: PS07011S01I

Comment text: Notice of Trial Decision (Remand of Revocation)

GRNT Written decision to grant
PR0701 Registration of establishment

Comment text: Registration of Establishment

Patent event date: 19990910

Patent event code: PR07011E01D

PR1002 Payment of registration fee

Payment date: 19990911

End annual number: 3

Start annual number: 1

PG1601 Publication of registration
PR1001 Payment of annual fee

Payment date: 20020911

Start annual number: 4

End annual number: 6

PR1001 Payment of annual fee

Payment date: 20050906

Start annual number: 7

End annual number: 9

PR1001 Payment of annual fee

Payment date: 20080827

Start annual number: 10

End annual number: 10

PR1001 Payment of annual fee

Payment date: 20090828

Start annual number: 11

End annual number: 11

PR1001 Payment of annual fee

Payment date: 20100902

Start annual number: 12

End annual number: 12

PR1001 Payment of annual fee

Payment date: 20110901

Start annual number: 13

End annual number: 13

PR1001 Payment of annual fee

Payment date: 20120821

Start annual number: 14

End annual number: 14

FPAY Annual fee payment

Payment date: 20130821

Year of fee payment: 15

PR1001 Payment of annual fee

Payment date: 20130821

Start annual number: 15

End annual number: 15

FPAY Annual fee payment

Payment date: 20140820

Year of fee payment: 16

PR1001 Payment of annual fee

Payment date: 20140820

Start annual number: 16

End annual number: 16

FPAY Annual fee payment

Payment date: 20150821

Year of fee payment: 17

PR1001 Payment of annual fee

Payment date: 20150821

Start annual number: 17

End annual number: 17

EXPY Expiration of term
PC1801 Expiration of term