WO2008053889A1 - Procédé de recherche de cellule, station mobile et station de base - Google Patents
Procédé de recherche de cellule, station mobile et station de base Download PDFInfo
- Publication number
- WO2008053889A1 WO2008053889A1 PCT/JP2007/071123 JP2007071123W WO2008053889A1 WO 2008053889 A1 WO2008053889 A1 WO 2008053889A1 JP 2007071123 W JP2007071123 W JP 2007071123W WO 2008053889 A1 WO2008053889 A1 WO 2008053889A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cell
- synchronization channel
- sequence
- secondary synchronization
- channel
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
- H04J11/0069—Cell search, i.e. determining cell identity [cell-ID]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
- H04J11/0069—Cell search, i.e. determining cell identity [cell-ID]
- H04J11/0073—Acquisition of primary synchronisation channel, e.g. detection of cell-ID within cell-ID group
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03828—Arrangements for spectral shaping; Arrangements for providing signals with specified spectral properties
- H04L25/03866—Arrangements for spectral shaping; Arrangements for providing signals with specified spectral properties using scrambling
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2602—Signal structure
- H04L27/261—Details of reference signals
- H04L27/2613—Structure of the reference signals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
- H04L27/2655—Synchronisation arrangements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
- H04L27/2655—Synchronisation arrangements
- H04L27/2656—Frame synchronisation, e.g. packet synchronisation, time division duplex [TDD] switching point detection or subframe synchronisation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
- H04L27/2655—Synchronisation arrangements
- H04L27/2657—Carrier synchronisation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
- H04L27/2655—Synchronisation arrangements
- H04L27/2668—Details of algorithms
- H04L27/2673—Details of algorithms characterised by synchronisation parameters
- H04L27/2675—Pilot or known symbols
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0014—Three-dimensional division
- H04L5/0016—Time-frequency-code
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
- H04L5/005—Allocation of pilot signals, i.e. of signals known to the receiver of common pilots, i.e. pilots destined for multiple users or terminals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/20—Selecting an access point
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2602—Signal structure
- H04L27/261—Details of reference signals
- H04L27/2613—Structure of the reference signals
- H04L27/26134—Pilot insertion in the transmitter chain, e.g. pilot overlapping with data, insertion in time or frequency domain
Definitions
- An object of the present invention is to realize a high-speed cell search in the OFDM scheme. Means for solving the problem
- the above object of the present invention is a cell search method executed by a mobile station that performs communication in the OFDM scheme:
- a cell ID detector that correlates with each cell ID of the cell ID group with a common pilot channel and detects a cell ID from the cell ID group;
- FIG. 1C is a flowchart showing a cell search method according to an embodiment of the present invention (part 3).
- FIG.6 Diagram showing allocation of primary synchronization channel sequences with different timings in a 3-cell configuration
- P SCH Primary synchronization channel
- the mobile station 20 detects cell-specific control information including frame timing and a cell ID group from the secondary synchronization channel. Specifically, using the FFT timing obtained in the first step, the received signal is FFT processed by the FFT unit 205 and input to the demultiplexing unit 207.
- the demultiplexer 207 distributes the multiplexed signal to the primary synchronization channel (P-SCH) and the secondary synchronization channel (S-SCH).
- the primary synchronization channel is input to channel estimation section 209, and the secondary synchronization channel is input to demodulation section 211.
- Channel estimation section 209 performs channel estimation, and the result is input to demodulation section 211.
- the W-CDMA system is an inter-cell asynchronous system, even if each cell uses the same (one type) primary synchronization channel sequence, the cell search is less affected by adjacent cell power.
- the OFDM system it is also possible to use one type of primary synchronization channel sequence.
- the synchronization channel timing can be detected with high accuracy by using replica correlation.
- the processing amount of the mobile station can be reduced.
- an inter-cell synchronization system is also being studied from the viewpoint of improving reception quality.
- signals from neighboring cells may be received almost simultaneously by the mobile station.
- an estimated value of the channel obtained by combining the channels of a plurality of cells is obtained.
- the secondary synchronization channel it is possible to obtain high detection accuracy by synchronously detecting the secondary synchronization channel using the primary synchronization channel as a reference signal.
- the synchronous detection of the secondary synchronization channel of the desired cell is performed. There is a possibility of not being able to do correctly.
- P-SCH correlation section 201 (Fig. 3) of mobile station 20 needs to perform correlation processing corresponding to the number of types of primary synchronization channel sequences. Correlation processing becomes complicated.
- a two-layer code composed of a lower layer code and an upper layer code is used as the primary synchronization channel sequence.
- An example of a two-layer code is shown in Fig. 5.
- the primary synchronization channel sequence (pi, p2, p3) is combined with a lower layer code (al, a2, a3, a4) that is common among cells and an upper layer code (cl, c2, c3) that is different for each cell.
- cl, c2, c3 an upper layer code
- Figure 6 shows an example of assigning primary synchronization channels in this way.
- Cell 1 transmits primary synchronization channel sequence pi at timing tl
- cell 2 transmits primary synchronization channel sequence pi at timing t2
- cell 3 transmits primary synchronization channel sequence pi at timing t3.
- FIG. 7A to Figure 7C show examples of synchronization channel configurations when two synchronization channels are placed in one frame. Show.
- FIG. 7A shows a case where the primary synchronization channel and the secondary synchronization channel are arranged close to the first subframe and the center subframe.
- FIG. 7B shows a case where the primary synchronization channel is arranged at the end of the first subframe and the center subframe, and the secondary synchronization channel is arranged in the next subframe.
- the secondary synchronization channel is determined by the CP length of the primary synchronization channel. The position of P changes. (When long CP is used, the range occupied by P-SCH increases and S-SCH moves forward.) Therefore, by placing the primary synchronization channel and the secondary synchronization channel at the end of the frame, processing that does not depend on the CP length becomes possible.
- multiple secondary synchronization channels may be arranged in one frame.
- FIG. 8A and FIG. 8B show secondary synchronization channel sequences when two secondary synchronization channels are mapped in one frame and the secondary synchronization channel sequence is composed of an orthogonal sequence and a scramble sequence.
- the first secondary synchronization channel sequence an arbitrary one of M types of scramble sequences is used, and an arbitrary one of N types of orthogonal sequences is selected.
- a scramble sequence common to the first secondary synchronization channel sequence is used as the second secondary synchronization channel sequence, and N types of orthogonal sequences are selected from the first secondary synchronization channel sequence. Select the one that is pre-associated with the assigned one.
- a scramble sequence and an orthogonal sequence are associated in advance, and a sequence corresponding to the sequence selected in the first secondary synchronization channel is selected in the second secondary synchronization channel based on the correspondence relationship.
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Databases & Information Systems (AREA)
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Power Engineering (AREA)
- Computer Security & Cryptography (AREA)
- Mobile Radio Communication Systems (AREA)
- Synchronisation In Digital Transmission Systems (AREA)
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2007800484258A CN101574009B (zh) | 2006-11-01 | 2007-10-30 | 小区搜索方法、移动台以及基站 |
EP07830857A EP2079178A4 (en) | 2006-11-01 | 2007-10-30 | CELL SEARCH PROCESS, MOBILE STATION AND BASE STATION |
US12/447,887 US8331347B2 (en) | 2006-11-01 | 2007-10-30 | Cell search method, mobile station, and base station |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006298310A JP4786503B2 (ja) | 2006-11-01 | 2006-11-01 | セルサーチ方法、移動局及び基地局 |
JP2006-298310 | 2006-11-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2008053889A1 true WO2008053889A1 (fr) | 2008-05-08 |
Family
ID=39344231
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2007/071123 WO2008053889A1 (fr) | 2006-11-01 | 2007-10-30 | Procédé de recherche de cellule, station mobile et station de base |
Country Status (6)
Country | Link |
---|---|
US (1) | US8331347B2 (ja) |
EP (1) | EP2079178A4 (ja) |
JP (1) | JP4786503B2 (ja) |
KR (1) | KR20090064482A (ja) |
CN (1) | CN101574009B (ja) |
WO (1) | WO2008053889A1 (ja) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2150011A1 (en) | 2008-08-01 | 2010-02-03 | Broadcom Corporation | Method and system for an OFDM joint timing and frequency tracking system |
WO2011057472A1 (zh) * | 2009-11-10 | 2011-05-19 | 电信科学技术研究院 | 一种小区搜索方法及设备 |
CN102172071A (zh) * | 2008-08-11 | 2011-08-31 | 株式会社Ntt都科摩 | 用户装置和小区搜索方法 |
JP2012231486A (ja) * | 2007-01-10 | 2012-11-22 | Qualcomm Inc | セルの高速な探索 |
Families Citing this family (22)
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WO2007097597A2 (en) | 2006-02-24 | 2007-08-30 | Lg Electronics Inc. | Methods of searching code sequence in mobile communication system |
US8848621B2 (en) * | 2008-06-11 | 2014-09-30 | Qualcomm Incorporated | Apparatus and method for cell-based highly detectable pilot multiplexing |
EP2396914A4 (en) * | 2009-02-10 | 2015-03-25 | Lenovo Innovations Ltd Hong Kong | NON-COHERENT PROCEDURE FOR DETECTING THE NUMBER OF TRANSIT ANTENNAPORTS FOR OFDMA |
KR101063346B1 (ko) | 2009-04-13 | 2011-09-07 | 인하대학교 산학협력단 | 3gpp lte 시스템의 셀 탐색기 복잡도 최소화를 위한 cp길이 선결정 방법 |
EP2288209B1 (en) * | 2009-08-13 | 2012-10-10 | Mitsubishi Electric R&D Centre Europe B.V. | Tranferring a sequence enabling the identification of the home base station by mobile terminal |
EP3691172B1 (en) | 2009-10-01 | 2023-12-06 | InterDigital Patent Holdings, Inc. | Uplink control data transmission |
JP2011130088A (ja) | 2009-12-16 | 2011-06-30 | Sony Corp | 端末装置、ハンドオーバのための方法、基地局及び無線通信システム |
KR101521001B1 (ko) | 2010-01-08 | 2015-05-15 | 인터디지탈 패튼 홀딩스, 인크 | 다중 반송파의 채널 상태 정보 전송 방법 |
KR20120042138A (ko) * | 2010-10-22 | 2012-05-03 | 한국전자통신연구원 | 이동통신 시스템에서의 셀 탐색 방법 |
KR101443191B1 (ko) | 2010-11-17 | 2014-09-25 | 한국전자통신연구원 | 이동 단말의 셀 탐색기 및 그것의 주변 셀 탐색 방법 |
US10187859B2 (en) | 2011-02-14 | 2019-01-22 | Qualcomm Incorporated | Power control and user multiplexing for heterogeneous network coordinated multipoint operations |
US8923197B2 (en) * | 2011-06-01 | 2014-12-30 | Samsung Electronics Co., Ltd. | Methods and apparatus to transmit and receive synchronization signal and system information in a wireless communication system |
CN103379523B (zh) * | 2012-04-19 | 2019-03-08 | 马维尔国际有限公司 | 用于处理lte系统中的大频率误差低复杂度灵活pss相关器 |
US8718017B2 (en) * | 2012-09-12 | 2014-05-06 | Qualcomm Incorporated | Confirmation of base station identification to improve handover |
JP2014082676A (ja) * | 2012-10-17 | 2014-05-08 | Ntt Docomo Inc | 無線通信方法、無線通信システム、無線基地局及びユーザ端末 |
DE102013015167B4 (de) * | 2013-09-11 | 2017-04-27 | Intel IP Corporation | Verfahren zum Filtern von Kandidatenzellen |
CN105406950A (zh) * | 2014-08-07 | 2016-03-16 | 索尼公司 | 用于无线通信的装置和方法、电子设备及其方法 |
US10674514B2 (en) * | 2014-10-31 | 2020-06-02 | Mitsubishi Electric Corporation | Communication system |
CN108306989B (zh) * | 2018-04-20 | 2020-02-14 | 北京全路通信信号研究设计院集团有限公司 | 一种用于铁路调度集中系统的主备机数据同步方法 |
CN109743277B (zh) * | 2018-11-28 | 2021-12-10 | 西安宇飞电子技术有限公司 | 一种ofdm系统快速接入搜索方法及快速接入搜索装置 |
EP4010996A1 (en) | 2019-08-05 | 2022-06-15 | Shure Acquisition Holdings, Inc. | Transmit antenna diversity wireless audio system |
KR20210075732A (ko) * | 2019-12-13 | 2021-06-23 | 삼성전자주식회사 | 무선 통신 시스템에서 동기 신호를 검출하는 방법 및 장치 |
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2006
- 2006-11-01 JP JP2006298310A patent/JP4786503B2/ja not_active Expired - Fee Related
-
2007
- 2007-10-30 US US12/447,887 patent/US8331347B2/en not_active Expired - Fee Related
- 2007-10-30 KR KR1020097010341A patent/KR20090064482A/ko not_active Application Discontinuation
- 2007-10-30 CN CN2007800484258A patent/CN101574009B/zh not_active Expired - Fee Related
- 2007-10-30 WO PCT/JP2007/071123 patent/WO2008053889A1/ja active Application Filing
- 2007-10-30 EP EP07830857A patent/EP2079178A4/en not_active Withdrawn
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Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012231486A (ja) * | 2007-01-10 | 2012-11-22 | Qualcomm Inc | セルの高速な探索 |
US8634403B2 (en) | 2007-01-10 | 2014-01-21 | Qualcomm Incorporated | Fast cell search |
US8687620B2 (en) | 2007-01-10 | 2014-04-01 | Qualcomm Incorporated | Fast cell search |
JP2015043584A (ja) * | 2007-01-10 | 2015-03-05 | クゥアルコム・インコーポレイテッドQualcomm Incorporated | セルの高速な探索 |
US9480006B2 (en) | 2007-01-10 | 2016-10-25 | Qualcomm Incorporated | Fast cell search |
EP2150011A1 (en) | 2008-08-01 | 2010-02-03 | Broadcom Corporation | Method and system for an OFDM joint timing and frequency tracking system |
KR101056095B1 (ko) | 2008-08-01 | 2011-08-11 | 브로드콤 코포레이션 | Ofdm 공동 타이밍 및 주파수 추적 시스템을 위한 방법 및 시스템 |
US8559296B2 (en) | 2008-08-01 | 2013-10-15 | Broadcom Corporation | Method and system for an OFDM joint timing and frequency tracking system |
US8929197B2 (en) | 2008-08-01 | 2015-01-06 | Broadcom Corporation | Method and system for an OFDM joint training and frequency tracking system |
CN102172071A (zh) * | 2008-08-11 | 2011-08-31 | 株式会社Ntt都科摩 | 用户装置和小区搜索方法 |
WO2011057472A1 (zh) * | 2009-11-10 | 2011-05-19 | 电信科学技术研究院 | 一种小区搜索方法及设备 |
Also Published As
Publication number | Publication date |
---|---|
EP2079178A4 (en) | 2012-12-05 |
CN101574009B (zh) | 2013-03-13 |
CN101574009A (zh) | 2009-11-04 |
JP4786503B2 (ja) | 2011-10-05 |
JP2008118309A (ja) | 2008-05-22 |
KR20090064482A (ko) | 2009-06-18 |
US20100054184A1 (en) | 2010-03-04 |
US8331347B2 (en) | 2012-12-11 |
EP2079178A1 (en) | 2009-07-15 |
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