KR100773612B1 - Cdma 통신시스템에서의 이동국 지원 타이밍 동기 방법 - Google Patents
Cdma 통신시스템에서의 이동국 지원 타이밍 동기 방법 Download PDFInfo
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- KR100773612B1 KR100773612B1 KR1020007007786A KR20007007786A KR100773612B1 KR 100773612 B1 KR100773612 B1 KR 100773612B1 KR 1020007007786 A KR1020007007786 A KR 1020007007786A KR 20007007786 A KR20007007786 A KR 20007007786A KR 100773612 B1 KR100773612 B1 KR 100773612B1
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- 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
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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
- H04B7/2662—Arrangements for Wireless System Synchronisation
- H04B7/2671—Arrangements for Wireless Time-Division Multiple Access [TDMA] System Synchronisation
- H04B7/2678—Time synchronisation
- H04B7/2687—Inter base stations synchronisation
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- 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
- H04B1/7075—Synchronisation aspects with code phase acquisition
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- 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
- H04B1/7075—Synchronisation aspects with code phase acquisition
- H04B1/70751—Synchronisation aspects with code phase acquisition using partial detection
- H04B1/70753—Partial phase search
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- 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
- H04B1/7075—Synchronisation aspects with code phase acquisition
- H04B1/7077—Multi-step acquisition, e.g. multi-dwell, coarse-fine or validation
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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
- H04B7/2662—Arrangements for Wireless System Synchronisation
- H04B7/2668—Arrangements for Wireless Code-Division Multiple Access [CDMA] System Synchronisation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/06—Synchronising arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/06—Synchronising arrangements
- H04J3/0635—Clock or time synchronisation in a network
- H04J3/0682—Clock or time synchronisation in a network by delay compensation, e.g. by compensation of propagation delay or variations thereof, by ranging
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/003—Arrangements to increase tolerance to errors in transmission or reception timing
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- 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
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- 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
- H04B2201/70702—Intercell-related aspects
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J13/00—Code division multiplex systems
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Abstract
Description
γ2 의 추정치의 부정확성에도 불구하고, 상기 시간 전송 방법은 역송(backhaul)과 같은 많은 다른 수단을 통해 제공될 수 있는 것보다 양호한 타이밍을 제공할 수 있다. 그러므로, 위에서 설명된 것처럼 본 발명에 의하여 γ2 을 추정하는 것은 탐색(search) 윈도우즈의 크기를 감소시킬 수 있으며, 그러므로 윈도우즈가 초과하지 않음을 확보할 수 있다. 본 발명은 역시 두 개의 기지국들로부터 수신한 신호들이 같은 파일럿(pilot) PN 위상으로 도착하지 않을 정도로 충분히 정확한 타이밍을 역시 제공한다. 그러므로 다른 기지국들로부터의 파일럿들이 구별될 수 있다.
이상에서 설명한 바와 같이, 본 발명은 네트워크의 일부분이 집중된 타이밍 신호를 수신하여 그 타이밍 신호로부터 타이밍을 획득하고, 기지국들의 일부가 집중된 타이밍 신호를 수신할 수 없는 환경에서도 타이밍 동기를 제공할 수 있는 효과가 있다.
Claims (8)
- 제 2 기지국을 제 1 기지국과 시간 동기시키는 방법으로서,상기 제 1 기지국에서 상기 제 1 기지국으로부터 상기 제 1 기지국과 통신 중인 이동국으로의 전송과 상기 이동국으로부터 상기 제 1 기지국으로의 전송 간의 라운드 트립 지연 간격(round trip delay interval)을 측정하는 단계;상기 이동국으로부터의 통신을 수신함에 있어서 상기 제 2 기지국을 지원하기 위해 상기 제 1 기지국에서 상기 제 2 기지국으로 긴 PN 코드와 상기 라운드 트립 지연 간격을 포함하는 정보를 전달하는 단계;상기 이동국에 의해 전송된 역방향 링크 전송들을 상기 제 2 기지국에서 수신하고 상기 수신 시간을 기록하는 단계;상기 이동국에 의한 전송과 상기 제 2 기지국에 의한 수신 사이에 일어나는 지연의 추정치를 상기 제 2 기지국에서 결정하는 단계; 및상기 제 2 기지국에서 상기 지연 추정치, 상기 이동국으로부터 상기 제 2 기지국으로의 전송을 상기 제 2 기지국에서 수신한 시간, 및 상기 측정된 라운드 트립 지연 간격을 기초로 타이밍 보정값을 계산하는 단계를 포함하는 시간 동기 방법.
- 제 1항에 있어서, 상기 전달하는 단계는,상기 이동국을 식별하기 위한 긴 PN 코드와 상기 라운드 트립 지연 간격을 포함하는 메시지를 상기 제 2 기지국에서 수신하는 단계를 더 포함하는 시간 동기 방법.
- 제 2항에 있어서, 상기 메시지는 상기 제 1 기지국으로부터 상기 제 2 기지국으로 전송되는 시간 동기 방법.
- 제 3항에 있어서, 상기 메시지는 상기 제 1 기지국 및 상기 제 2 기지국과 통신하는 기지국 제어기를 통해서 상기 제 1 기지국에 의해 상기 제 2 기지국으로 전송되는 시간 동기 방법.
- 제 1항에 있어서, 상기 전달하는 단계는,복수의 이동국들로부터의 통신들을 수신하는 단계;상기 제 2 기지국과 가장 잘 통신할 수 있는 이동국을 선택하는 단계; 및상기 이동국을 식별하기 위한 긴 PN 코드와 상기 라운드 트립 지연 간격을 포함하는 메시지를 전송하는 단계를 더 포함하는 시간 동기 방법.
- 제 5항에 있어서, 상기 이동국을 선택하는 단계는 상기 제 1 기지국으로부터 가장 멀리 있는 이동국을 선택함으로써 수행되는 시간 동기 방법.
- 삭제
- 제 6항에 있어서, 상기 선택 단계는 상기 제 2 기지국에 인접한 상기 제 1 기지국의 섹터와 통신하는 이동국을 선택함으로써 수행되는 시간 동기 방법.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/008,203 | 1998-01-16 | ||
US09/008,203 US6307840B1 (en) | 1997-09-19 | 1998-01-16 | Mobile station assisted timing synchronization in CDMA communication system |
PCT/US1999/000909 WO1999037037A1 (en) | 1998-01-16 | 1999-01-15 | Mobile station assisted timing synchronization in a cdma communication system |
Related Child Applications (1)
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KR1020077007014A Division KR100941161B1 (ko) | 1998-01-16 | 1999-01-15 | Cdma 통신시스템에서의 이동국 지원 타이밍 동기 방법 |
Publications (2)
Publication Number | Publication Date |
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KR20010034164A KR20010034164A (ko) | 2001-04-25 |
KR100773612B1 true KR100773612B1 (ko) | 2007-11-05 |
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Application Number | Title | Priority Date | Filing Date |
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KR1020007007786A KR100773612B1 (ko) | 1998-01-16 | 1999-01-15 | Cdma 통신시스템에서의 이동국 지원 타이밍 동기 방법 |
KR1020087025975A KR100975863B1 (ko) | 1998-01-16 | 1999-01-15 | Cdma 통신시스템에서의 이동국 지원 타이밍 동기 방법 |
KR1020077007014A KR100941161B1 (ko) | 1998-01-16 | 1999-01-15 | Cdma 통신시스템에서의 이동국 지원 타이밍 동기 방법 |
Family Applications After (2)
Application Number | Title | Priority Date | Filing Date |
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KR1020087025975A KR100975863B1 (ko) | 1998-01-16 | 1999-01-15 | Cdma 통신시스템에서의 이동국 지원 타이밍 동기 방법 |
KR1020077007014A KR100941161B1 (ko) | 1998-01-16 | 1999-01-15 | Cdma 통신시스템에서의 이동국 지원 타이밍 동기 방법 |
Country Status (24)
Country | Link |
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US (2) | US6307840B1 (ko) |
EP (2) | EP1048128A1 (ko) |
JP (2) | JP4373004B2 (ko) |
KR (3) | KR100773612B1 (ko) |
CN (2) | CN100456645C (ko) |
AU (1) | AU746708B2 (ko) |
BG (1) | BG64661B1 (ko) |
BR (1) | BR9906959B1 (ko) |
CA (1) | CA2316260C (ko) |
CZ (1) | CZ301668B6 (ko) |
FI (1) | FI120813B (ko) |
HU (1) | HUP0100858A3 (ko) |
ID (1) | ID27751A (ko) |
IL (2) | IL136952A (ko) |
MX (1) | MXPA00006936A (ko) |
NO (1) | NO317101B1 (ko) |
NZ (2) | NZ505285A (ko) |
PL (1) | PL192830B1 (ko) |
RO (1) | RO121246B1 (ko) |
RU (3) | RU2294059C2 (ko) |
SK (1) | SK287389B6 (ko) |
TR (1) | TR200002055T2 (ko) |
UA (1) | UA67758C2 (ko) |
WO (1) | WO1999037037A1 (ko) |
Cited By (1)
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