WO2009082953A1 - Procédé, système et dispositif de transmission par un canal synchrone - Google Patents

Procédé, système et dispositif de transmission par un canal synchrone Download PDF

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Publication number
WO2009082953A1
WO2009082953A1 PCT/CN2008/073674 CN2008073674W WO2009082953A1 WO 2009082953 A1 WO2009082953 A1 WO 2009082953A1 CN 2008073674 W CN2008073674 W CN 2008073674W WO 2009082953 A1 WO2009082953 A1 WO 2009082953A1
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WO
WIPO (PCT)
Prior art keywords
synchronization channel
primary synchronization
transmitting
channel
primary
Prior art date
Application number
PCT/CN2008/073674
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English (en)
Chinese (zh)
Inventor
Juejun Liu
Jianjun Yang
Original Assignee
Huawei Technologies Co., Ltd.
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 Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Publication of WO2009082953A1 publication Critical patent/WO2009082953A1/fr

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Classifications

    • 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
    • H04B7/2643—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using time-division multiple access [TDMA]
    • H04B7/2656—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using time-division multiple access [TDMA] for structure of frame, burst

Definitions

  • the present invention relates to the field of mobile communication technologies, and in particular, to a transmission method, system, and device for a synchronization channel. Background technique
  • the 802.16e standard was completed by the end of 2005.
  • the IEEE (Institute of Electrical and Electronics Engineers) 802.16 working group decided to set up an 802.16m working group dedicated to researching mobile WiMAX ( Worldwide Interoperability for Microwave Access, the next generation standard for Worldwide Interoperability for Microwave Access.
  • This new standard will be completed by the end of 2009 in accordance with the planning of the IEEE 802.16 working group.
  • the goal of the newly formed working group is to form a competitive and technological broadband wireless access technology that complies with ITU-R (International Telecommunication Union - Radio, International Telecommunication Union) (International Mobile Telecommunications) ) - Advanced requirements for 4G technology while maintaining interoperability with existing mobile WiMAX standards.
  • ITU-R International Telecommunication Union - Radio, International Telecommunication Union
  • International Mobile Telecommunications International Mobile Telecommunications
  • the core technologies of 802.16m are OFDMA (Orthogonal Frequency Division Multiple Access) and MIMO (Multiple Input Multiple-Output) technologies.
  • the transmission rate target reaches lGbit/s in a fixed state. Up to 100 Mbit/s in the mobile state, the spectrum utilization rate will reach 10 bit/s/Hz, and the performance of broadcast, multimedia and VoIP (voice over IP) services will be improved.
  • the synchronization channel transmission method in the existing 802.16e protocol is to use the first OFDM symbol of each frame as a synchronization channel (Preamble), and when the OFDM symbol corresponds to Broadcasting is performed in the whole cell, and the SS (Subscriber Station) uses the synchronization channel to synchronize time and frequency with the BS (Base Station).
  • the synchronization channel of 16e is as shown in FIG. 1, and the first OFDM symbol of each frame from the Nth frame to the N+3th frame is used as a synchronization channel.
  • 802.16m is an evolved version of 802.16e
  • the 802.16m standard requires compatibility with the 802.16e standard. Therefore, a subscriber station that specifies 802.16e can access an 802.16m network. Therefore, 802.16e needs to be considered when designing an 802.16m frame structure. Frame structure compatibility.
  • the 802.16m superframe structure and the synchronization channel transmission method are mentioned in 802.16m. As shown in FIG. 2, one superframe of 802.16m is composed of four consecutive 802.16e frames, and the synchronization channel is mainly composed.
  • the synchronization channel and the secondary synchronization channel wherein the primary synchronization channel is composed of a synchronization channel (Preamble) of each frame in 802.16e, and the secondary synchronization channel is designed for 802.16m, and there is an offset between the synchronization channel and the 802.16e synchronization channel.
  • Preamble a synchronization channel
  • 802.16e 802.16e synchronization channel
  • the 802.16e synchronization channel As the 802.16m primary synchronization channel and first complete the 802.16e frame synchronization, and then use the 802.16m secondary synchronization channel to complete the 802.16m superframe synchronization, which requires two steps of synchronization to complete. Synchronization of 802.16m superframes. At the same time, the technology does not support synchronization channels unique to different cells or carrier frequencies.
  • the embodiment of the invention provides a method, a system and a device for transmitting a synchronization channel, so as to implement synchronization channel transmission of 802.16m.
  • An embodiment of the present invention provides a method for sending a synchronization channel, including:
  • the network side device transmits the 802.16m secondary synchronization channel before or after transmitting the 802.16m primary synchronization channel, and the time offset between the secondary synchronization channel of each cell or carrier frequency and the 802.16m primary synchronization channel is different.
  • An embodiment of the present invention provides a method for receiving a synchronization channel, including: performing, by a user equipment, 802.16m primary synchronization channel detection;
  • the user equipment performs synchronous detection on the 802.16m auxiliary channel at time offsets of different cells or carrier frequencies.
  • An embodiment of the present invention provides a synchronization channel transmission system, including: a network side device, configured to send an 802.16m primary synchronization channel after transmitting another 802.16e synchronization channel, and send the 802.16 Transmitting a 802.16m secondary synchronization channel at a time offset before or after the primary synchronization channel of m;
  • the user equipment is configured to perform 802.16m primary synchronization channel detection, and perform synchronous detection on the 802.16m auxiliary channel in different cell or carrier frequency time offsets respectively.
  • the embodiment of the invention provides a network side device, including:
  • a primary synchronization channel sending unit configured to send an 802.16m primary synchronization channel at another time after transmitting the synchronization channel of the 802.16e;
  • a secondary synchronization channel sending unit configured to send the 802.16m secondary synchronization channel at a time offset before or after transmitting the 802.16m primary synchronization channel.
  • the embodiment of the invention provides a user equipment, including:
  • the primary synchronization channel detecting unit is configured to perform 802.16m primary synchronization channel detection
  • the auxiliary synchronization channel detecting unit is configured to perform synchronous detection on the 802.16m auxiliary channel in time offsets of different cells or carrier frequencies, respectively.
  • the 802.16m user station accesses the 802.16 network, it does not need to use the 802.16e synchronization channel to synchronize the 802.16m network, but directly detects the 802.16m primary synchronization channel to complete the full 802.16m.
  • the superframe synchronization of the network can speed up the process of accessing the network of the subscriber station and reduce the processing of the subscriber station.
  • the offset between the secondary synchronization channel and the primary synchronization channel of each cell or carrier frequency is different, the signal quality of multiple cells or carrier frequencies can be detected in a superframe in sequence by the user station. To determine the optimal cell or carrier frequency.
  • 1 is a schematic diagram of a synchronization channel of 16e in the prior art
  • 2 is a schematic diagram of transmission of a superframe structure and a synchronization channel of 802.16m in the prior art
  • FIG. 3 is a flowchart of a method for transmitting a synchronization channel according to an embodiment of the present invention
  • FIG. 4 is a schematic diagram of a primary synchronization channel and an auxiliary synchronization channel according to an embodiment of the present invention
  • FIG. 5 is a schematic diagram of a method for generating a secondary synchronization channel signal according to an embodiment of the present invention
  • FIG. 6a is a schematic diagram showing that the secondary synchronization channel of each cell is different from the primary synchronization channel offset in the embodiment of the present invention
  • 6b is a schematic diagram showing that the secondary synchronization channel of each carrier frequency is different from the primary synchronization channel offset in the embodiment of the present invention
  • FIG. 7a is another schematic diagram showing that the secondary synchronization channel of each cell is different from the primary synchronization channel offset in the embodiment of the present invention.
  • FIG. 7b is another schematic diagram showing that the secondary synchronization channel of each carrier frequency is different from the primary synchronization channel offset in the embodiment of the present invention.
  • FIG. 8 is a structural diagram of a transmission system of a synchronization channel in an embodiment of the present invention. detailed description
  • the network side first sends an 802.16e synchronization channel, then transmits a 802.16m primary synchronization channel at a time offset of the 802.16e synchronization channel, and finally a time offset of the 802.16m primary synchronization channel.
  • the 802.16m primary synchronization channel is fixed in the position of the entire 802.16m network, and is used for the synchronization of the 802.16m network by the subscriber station.
  • the secondary synchronization channel is specific to the cell or the carrier frequency, and is used for the user station to synchronize the cell or the carrier frequency.
  • An embodiment of the present invention provides a method for transmitting a synchronization channel, as shown in FIG. 3, including the following steps:
  • Step s301 The network side device sends an 802.16m primary synchronization channel at another time after transmitting the 802.16e synchronization channel, and sends the 802.16m primary synchronization signal.
  • a time offset before or after the channel transmits an 802.16m secondary synchronization channel.
  • the time offset between the secondary synchronization channel of each cell or carrier frequency and the primary synchronization channel of 802.16m is different.
  • the time offset is determined according to different cells or carrier frequencies.
  • the primary synchronization channel As shown in FIG. 4, there is an offset between the primary synchronization channel used for the whole-network superframe synchronization and the synchronization channel of 802.16e, and the offset may be 6 OFDM symbols (of course, other values may be used, but the entire The network is the same), the primary synchronization channel occupies 1 OFDM symbol in the time domain and occupies the center 5 MHz or 1.25 MHz bandwidth in the frequency domain.
  • the primary synchronization channel is simultaneously transmitted by all BSs of the entire 802.16m network on the same time and frequency resources, and the OFDM protection interval length of the synchronization channel is fixed, so that the user station can perform fast synchronization.
  • the value set here is only an example of the implementation of the present invention.
  • some information included in the primary synchronization channel may also be sent in the secondary synchronization channel, for example, the multi-carrier indication switch is placed in the secondary synchronization channel, then the primary synchronization is performed.
  • the offset is specific to the cell or carrier frequency.
  • the offset of the three cells or the carrier frequency relative to the primary synchronization channel is 2, 3, 4 respectively.
  • the OFDM symbol, the secondary synchronization channel occupies 1 OFDM symbol in the time domain, and can also occupy the center 5 MHz or 1.25 MHz bandwidth in the frequency domain.
  • the information included in the secondary synchronization channel has an 8-bit cell or carrier frequency identification and a 1-bit frequency reuse mode.
  • the secondary synchronization channel signal is generated as shown in FIG. 5.
  • the 9-bit information of the secondary synchronization channel is mapped to 512 bits after being mapped by a 512-bit orthogonal code (such as a Walsh code); and the interleaving information generated by the interleaving controller is 512 bits. Interleaving; then arbitrarily removing 512 bits by puncturing 80 bits of information to obtain 432 bits of information; 40 bits are added before and after the special information to form 512-bit information. Finally, 512-bit FFT (Fourier Transform) is performed on the 512-bit information to obtain a transmission sequence of the synchronization channel.
  • FFT Fast Fourier Transform
  • Step s302 The user equipment performs 802.16m primary synchronization channel detection; the user equipment performs synchronous detection on the 802.16m auxiliary channel in different cell or carrier frequency time offsets respectively.
  • the user equipment determines the optimal cell or carrier frequency by detecting the signal quality of multiple cells or carrier frequencies in a superframe in sequence.
  • the user station Since there is an offset between the secondary synchronization channel of each cell or carrier frequency and the primary synchronization channel of 802.16m, this offset can be different for each cell or carrier frequency, as shown in Figure 6a and Figure 6b, the user station is completed. After the detection of the primary synchronization channel, the detection of the secondary synchronization channel is performed. Since the location of the secondary synchronization channel of each cell or carrier frequency may be different from the offset of the primary synchronization channel, the subscriber station may detect the secondary synchronization channel of the other cell or the carrier frequency immediately after completing the detection of the secondary synchronization channel of one cell or carrier frequency.
  • the same time and frequency resources as those of other cells or carrier frequency transmission secondary synchronization channels can be scheduled for use by subscriber stations in the own cell or carrier frequency center. Differently using the offset between the secondary synchronization channel of each cell or carrier frequency and the primary synchronization channel can well realize that the user station detects the signal quality of multiple cells or carrier frequencies in a superframe in order to determine the access. Optimal cell or carrier frequency or frequency.
  • the primary synchronization channel in Figures 6a and 6b is in front of the secondary synchronization channel. In practice, the secondary synchronization channel can also be in front of the primary synchronization channel, as shown in Figures 7a and 7b.
  • the embodiment of the present invention further provides a synchronization channel transmission system, as shown in FIG. 8, including: the network side device 100, configured to send 802.16m primary synchronization at another time offset after transmitting the 802.16e synchronization channel. Channel, and transmitting a 802.16m secondary synchronization channel before or after transmitting the 802.16m primary synchronization channel; the user equipment 200 is configured to perform 802.16m primary synchronization channel detection, and respectively in different cells or The time offset of the frequency is synchronously detected on the 802.16m auxiliary channel.
  • the network side device 100 configured to send 802.16m primary synchronization at another time offset after transmitting the 802.16e synchronization channel.
  • Channel and transmitting a 802.16m secondary synchronization channel before or after transmitting the 802.16m primary synchronization channel
  • the user equipment 200 is configured to perform 802.16m primary synchronization channel detection, and respectively in different cells or The time offset of the frequency is synchronously detected on the 802.16m auxiliary channel.
  • the network side device 100 specifically includes: a primary synchronization channel sending unit 110, configured to send an 802.16m primary synchronization channel after transmitting another 802.16e synchronization channel; and a secondary synchronization channel sending unit 120, configured to send Transmitting the 802.16m secondary synchronization channel before or after the 802.16m primary synchronization channel; the time offset is indeed
  • the determining unit 130 is configured to determine a time offset between the secondary synchronization channel of each cell or carrier frequency and the primary synchronization channel of 802.16m according to different cell or carrier frequency locations.
  • the user equipment 200 specifically includes: a primary synchronization channel detecting unit 210, configured to perform 802.16m primary synchronization channel detection; and a secondary synchronization channel detecting unit 220, configured to time offset the 802.16m auxiliary channel in different cells or carrier frequencies, respectively. Perform synchronous detection.
  • the optimal cell or carrier access unit 230 is configured to sequentially detect signal quality of multiple cells or carrier frequencies in one superframe to determine the optimal cell or carrier frequency.
  • the 802.16m user station accesses the 802.16 network, it does not need to use the 802.16e synchronization channel to synchronize the 802.16m network, but directly detects the 802.16m primary synchronization channel to complete the full 802.16m.
  • the superframe synchronization of the network can speed up the process of accessing the network of the subscriber station and reduce the processing of the subscriber station.
  • the offset between the secondary synchronization channel and the primary synchronization channel of each cell or carrier frequency is different, the signal quality of multiple cells or carrier frequencies can be detected in a superframe in sequence by the user station. To determine the optimal cell or carrier frequency.
  • the cell can be covered by different carrier frequencies, so the embodiment of the present invention can be further extended to between different carrier frequencies, that is, between the secondary synchronization channel of each carrier frequency and the 802.16m primary synchronization channel.
  • the present invention can be implemented by hardware or by software plus necessary general hardware platform.
  • the technical solution of the present invention may be embodied in the form of a software product, which may be stored in a non-volatile storage medium (which may be a CD-ROM, a USB flash drive, a mobile hard disk, etc.), including several The instructions are for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform the methods described in various embodiments of the present invention.

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

Abstract

La présente invention concerne un procédé, un système et un dispositif de transmission par un canal synchrone. Le procédé implique qu'un dispositif côté réseau effectue une transmission par un canal synchrone auxiliaire de 802.16m avec un décalage temporel avant ou après un canal synchrone principal de 802.16m; les décalages temporels entre le canal synchrone auxiliaire pour chaque cellule ou porteuse et le canal synchrone principal étant différents. lorsqu'une station d'utilisateur de 802.16m accède à un réseau 802.16m, elle détecte automatiquement le canal synchrone principal de 802.16m de manière à achever la synchronisation de super trame de tout le réseau 802.16m et n'a pas besoin d'utiliser le canal synchrone de 802.16e pour réaliser la synchronisation par rapport au réseau 802.16m.
PCT/CN2008/073674 2007-12-25 2008-12-24 Procédé, système et dispositif de transmission par un canal synchrone WO2009082953A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN 200710301349 CN101471721B (zh) 2007-12-25 2007-12-25 一种同步信道的传输方法、系统及设备
CN200710301349.9 2007-12-25

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004039855A1 (de) 2004-08-17 2006-03-09 Siemens Ag Maschine mit einer Erregerwicklung aus Hoch-Tc-Supraleitern in einer Halteeinrichtung

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111556560B (zh) 2014-03-13 2022-07-12 Lg电子株式会社 装置到装置用户设备在无线通信系统中发送信号的方法和设备
US11071073B2 (en) * 2017-04-14 2021-07-20 Qualcomm Incorporated Radio synchronization configuration in different operation modes
CN107635281A (zh) * 2017-10-16 2018-01-26 海信集团有限公司 一种同步方法和装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1773980A (zh) * 2004-11-09 2006-05-17 华为技术有限公司 一种正交频分复用整数频率同步的方法
CN1809045A (zh) * 2005-12-12 2006-07-26 北京北方烽火科技有限公司 一种用于WiMAX系统基站接收端的联合定时同步方法
CN101001233A (zh) * 2006-01-12 2007-07-18 北京三星通信技术研究有限公司 传输下行同步信道的方法和设备
US20070280098A1 (en) * 2006-05-31 2007-12-06 Nokia Corporation Method, apparatus and computer program product providing synchronization for OFDMA downlink signal

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101009513B (zh) * 2006-01-26 2013-02-13 上海原动力通信科技有限公司 宽带时分双工蜂窝系统的小区同步方法及小区初搜方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1773980A (zh) * 2004-11-09 2006-05-17 华为技术有限公司 一种正交频分复用整数频率同步的方法
CN1809045A (zh) * 2005-12-12 2006-07-26 北京北方烽火科技有限公司 一种用于WiMAX系统基站接收端的联合定时同步方法
CN101001233A (zh) * 2006-01-12 2007-07-18 北京三星通信技术研究有限公司 传输下行同步信道的方法和设备
US20070280098A1 (en) * 2006-05-31 2007-12-06 Nokia Corporation Method, apparatus and computer program product providing synchronization for OFDMA downlink signal

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004039855A1 (de) 2004-08-17 2006-03-09 Siemens Ag Maschine mit einer Erregerwicklung aus Hoch-Tc-Supraleitern in einer Halteeinrichtung

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CN101471721A (zh) 2009-07-01

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