WO2012003671A1 - 同步前导码发送方法、同步方法、装置及系统 - Google Patents

同步前导码发送方法、同步方法、装置及系统 Download PDF

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Publication number
WO2012003671A1
WO2012003671A1 PCT/CN2010/077598 CN2010077598W WO2012003671A1 WO 2012003671 A1 WO2012003671 A1 WO 2012003671A1 CN 2010077598 W CN2010077598 W CN 2010077598W WO 2012003671 A1 WO2012003671 A1 WO 2012003671A1
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Prior art keywords
preamble
synchronization
primary
unit frame
superframe
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PCT/CN2010/077598
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English (en)
French (fr)
Inventor
孙长印
方惠英
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中兴通讯股份有限公司
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Priority to US13/809,110 priority Critical patent/US9622200B2/en
Publication of WO2012003671A1 publication Critical patent/WO2012003671A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W56/00Synchronisation arrangements
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00Modulated-carrier systems
    • H04L27/26Systems using multi-frequency codes
    • H04L27/2601Multicarrier modulation systems
    • H04L27/2602Signal structure
    • H04L27/261Details of reference signals
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00Modulated-carrier systems
    • H04L27/26Systems using multi-frequency codes
    • H04L27/2601Multicarrier modulation systems
    • H04L27/2647Arrangements specific to the receiver only
    • H04L27/2655Synchronisation arrangements
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W56/00Synchronisation arrangements
    • H04W56/001Synchronization between nodes
    • H04W56/0015Synchronization between nodes one node acting as a reference for the others
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W92/00Interfaces specially adapted for wireless communication networks
    • H04W92/04Interfaces between hierarchically different network devices
    • H04W92/10Interfaces between hierarchically different network devices between terminal device and access point, i.e. wireless air interface

Definitions

  • the present invention relates to the field of communications, and in particular to a synchronization preamble transmission method, a synchronization method, an apparatus, and a system.
  • OFDM Orthogonal Frequency Division Multiplex
  • ISI Inter-symbol Interference
  • OFDM technology more and more widely used in wireless communication watersheds, such as Wireless Local Area Network (WL AN) system, 802.16e system based on Orthogonal Frequency Division Multiple Access (OFDM), and 802.16e next-generation evolved 802.16m system, etc.; system for OFDM technology.
  • WL AN Wireless Local Area Network
  • 802.16e system based on Orthogonal Frequency Division Multiple Access (OFDM), and 802.16e next-generation evolved 802.16m system, etc.
  • OFDM technology OFDM technology
  • the mobile station usually accesses the network by means of a Synchronization Channel (SCH), and transmits the related system of the current system through a preamble in the synchronization channel.
  • SCH Synchronization Channel
  • the general access steps include:
  • the mobile station (Mobile Station, referred to as MS) starts the subsequent access process according to the information in the broadcast message.
  • the MS access can be divided into an initial access and a non-initial access process, where the initial access refers to a process in which the MS power is powered on and accesses the system, and the initial process is the handover access process.
  • An important indicator of the access process is the access time. The shorter the access time is, the higher the system performance is. However, the access process needs to be implemented by means of the SCH, and the SCH occupies a certain resource.
  • the synchronization preamble consists of one primary preamble and three secondary preambles, which are respectively carried in four unit frames of one superframe.
  • the SCH overhead of the system is relatively large.
  • a primary object of the present invention is to provide a synchronization preamble transmission method, a synchronization method, an apparatus, and a system, to solve the problem that the SCH overhead is relatively large during synchronization.
  • a synchronization preamble transmission method is provided.
  • the method for transmitting a synchronization preamble includes: transmitting a synchronization preamble in a superframe, the synchronization preamble being a primary preamble and two i preambles, wherein the primary synchronization preamble carries system bandwidth information, and the secondary synchronization
  • the preamble carries cell/sector identification ID information.
  • transmitting the synchronization preamble in the superframe includes: transmitting the synchronization preamble in one of the following manners on the four unit frames of the superframe: transmitting the secondary synchronization preamble on the first unit frame, on the second unit frame Transmitting a primary synchronization preamble, transmitting a secondary synchronization preamble on a third unit frame; transmitting a secondary synchronization preamble on the first unit frame, transmitting a primary synchronization preamble on the third unit frame, and transmitting the secondary synchronization frame on the fourth unit frame Synchronize the preamble.
  • the primary synchronization preamble and/or the secondary synchronization preamble are located on the first symbol of the unit frame.
  • a synchronization method includes: receiving a synchronization preamble on a superframe, wherein the synchronization preamble is a primary preamble and two secondary preambles, the primary preamble carries system bandwidth information, and the secondary preamble carries a cell/sector Identifying the ID information; performing the primary preamble detection, and acquiring the system bandwidth information carried in the primary preamble; performing the secondary preamble detection, and acquiring the cell/sector identification ID information carried in the secondary preamble; Synchronize with the cell/sector identification ID information.
  • receiving the synchronization preamble on the superframe comprises: receiving the synchronization preamble in one of the following manners on the four unit frames of the superframe: receiving the secondary preamble on the first unit frame, and receiving on the second unit frame
  • the primary preamble receives the secondary preamble on the third unit frame; receives the secondary preamble on the first unit frame, receives the primary preamble on the third unit frame, and receives the secondary preamble on the fourth unit frame.
  • the primary preamble and/or the secondary preamble are located on the first symbol of the unit frame.
  • the control station includes: a sending module, configured to send a synchronization preamble in a superframe, the synchronization preamble is a primary preamble and two preamble preambles, wherein the main preamble carries system bandwidth information, The secondary preamble carries cell/sector identification ID information.
  • the sending module sends the synchronization preamble in one of the following manners on the four unit frames of the superframe: transmitting the secondary preamble on the first unit frame, and transmitting the main preamble on the second unit frame, The secondary preamble is transmitted on the three unit frame; the secondary preamble is transmitted on the first unit frame, the primary preamble is transmitted on the third unit frame, and the preamble is transmitted on the fourth unit frame.
  • a terminal is also provided.
  • the terminal includes: a receiving module, configured to receive a synchronization preamble, where the synchronization preamble is a primary preamble and two secondary preambles, the primary preamble carries system bandwidth information, and the secondary preamble carries a cell/sector.
  • the primary preamble detection module is configured to perform primary preamble detection; the first acquisition module is configured to acquire system bandwidth information carried in the primary preamble; and the secondary preamble detection module is configured to perform secondary preamble detection; a second acquiring module, configured to acquire cell/sector identification ID information carried in the secondary preamble; and a synchronization module, configured to perform synchronization according to system bandwidth information and cell/sector identification ID information.
  • a transmission system for a synchronization preamble is provided.
  • the transmission system of the synchronization preamble according to the present invention includes the above-described control station and the above-described terminal.
  • the present invention is used to transmit a synchronization preamble in a superframe, where the preamble is a primary preamble and two secondary preambles, which solves the problem that the SCH overhead is relatively large during the synchronization process, thereby ensuring synchronous access. Based on the performance, the effect of reducing the SCH overhead is achieved.
  • FIG. 1 is a schematic diagram of a superframe structure according to the related art
  • FIG. 2 is a schematic diagram 1 of a primary preamble and a secondary preamble according to an embodiment of the present invention
  • FIG. 3 is a primary preamble and a secondary according to an embodiment of the present invention
  • Figure 2 is a flow chart of a synchronization method according to an embodiment of the present invention
  • Figure 5 is a flow chart of a synchronization method in accordance with a preferred embodiment of the present invention
  • Figure 6 is a control station in accordance with an embodiment of the present invention
  • FIG. 7 is a structural block diagram of a terminal according to an embodiment of the present invention
  • FIG. 8 is a structural block diagram of a transmission system of a synchronization preamble according to an embodiment of the present invention.
  • FIG. 1 is a schematic diagram of a superframe structure of a transmission synchronization preamble according to the related art.
  • the superframe is composed of 4 unit frames, and the superframe control is performed.
  • the information is located on thousands of symbols at the beginning of the superframe.
  • the unit frame is composed of 8 subframe units, and the subframe unit is divided into a downlink subframe unit and an uplink subframe unit, which can be configured according to the system.
  • Each subframe unit is composed of 6 OFDM symbols.
  • a synchronization preamble transmission method includes: transmitting a synchronization preamble on a superframe, where the synchronization preamble is a primary preamble and two secondary preambles, where the primary preamble carries system bandwidth information, and the secondary preamble carries a cell/sector ID information.
  • the transmitted synchronization preamble is a primary preamble and two secondary preambles, which reduces the configuration of one secondary preamble, and avoids the problem that the SCH overhead is relatively large in the synchronization process in the related art, and further guarantees Based on the synchronous access performance, the effect of reducing the SCH overhead is achieved.
  • the synchronization preamble is transmitted in one of the following manners on the four unit frames of the superframe: the secondary preamble is transmitted on the first unit frame. a code, transmitting a primary preamble on a second unit frame, transmitting a secondary preamble on a third unit frame; transmitting a secondary preamble on the first unit frame, and transmitting a primary preamble on the third unit frame, A secondary preamble is transmitted on a four unit frame.
  • the primary preamble is transmitted in the middle of the unit frame, and the secondary preamble is transmitted on both sides of the primary preamble, so that the terminal has the opportunity to demodulate the secondary preamble twice, which improves the auxiliary.
  • the accuracy of the preamble demodulation improves the accuracy of the synchronization.
  • the primary preamble and/or the secondary preamble are located on the first symbol of the unit frame.
  • the preferred embodiment defines that the location of the primary preamble and/or the secondary preamble is on the first symbol of the unit frame, which facilitates terminal positioning to receive the primary preamble and the secondary preamble, reducing access time and improving The efficiency of synchronization.
  • Embodiment 2 This embodiment combines Embodiment 1 and a preferred embodiment thereof.
  • a method for transmitting a synchronization preamble is provided.
  • 2 is a first schematic diagram of a primary preamble and a secondary preamble according to an embodiment of the present invention.
  • a synchronization channel (synchronization preamble) is composed of a primary synchronization channel (primary preamble P-Preamble) and two A secondary synchronization channel (S-Preamble) is composed of
  • FIG. 2 is a superframe header carrying a system control information, and the first subframe of the first unit frame of the superframe header in the superframe Send on the frame).
  • the primary preamble is sent once in the superframe.
  • FIG. 3 is a first schematic diagram of a primary preamble and a secondary preamble according to an embodiment of the present invention. As shown in FIG. 3, the primary preamble is transmitted once in an 802.16m superframe, and the third 802.16m in a superframe. The first symbol of the unit frame transmits the primary preamble, and the secondary preamble is transmitted twice in the 802.16m superframe, and the first symbol of the first and fourth 16m unit frames in the superframe is transmitted.
  • the primary preamble is transmitted in the first symbol of the second or third unit frame in the superframe
  • the secondary preamble is transmitted in the first, third or first, fourth positions in the superframe, which reduces synchronization.
  • the SCH overhead is relatively large, and on the basis of ensuring the synchronous access performance, the effect of reducing the SCH overhead is achieved.
  • FIG. 4 is a flowchart of a synchronization method according to an embodiment of the present invention. As shown in FIG. 4, the method includes: Step S402: Receive a synchronization preamble on a superframe, where the synchronization preamble is a primary preamble and two secondary preambles.
  • the code, the primary preamble carries the system bandwidth information
  • the secondary preamble carries the cell/sector identification ID information.
  • the primary preamble detection is performed, and the system bandwidth information carried in the primary preamble is obtained.
  • Step S406 Perform secondary preamble detection, and obtain cell/sector identification ID information carried in the secondary preamble.
  • the synchronization preamble is received in one of the following manners on the four unit frames of the superframe: the secondary preamble is received on the first unit frame, and the primary preamble is received on the second unit frame.
  • the secondary preamble is received on the three unit frame; the secondary preamble is received on the first unit frame, the primary preamble is received on the third unit frame, and the secondary preamble is received on the fourth unit frame.
  • the primary preamble is received at an intermediate position of the unit frame, and the secondary preamble is received on both sides of the primary preamble, so that the terminal has the opportunity to receive and demodulate the secondary preamble twice, thereby improving
  • the accuracy of the secondary preamble demodulation improves the accuracy of the synchronization.
  • the primary preamble and/or the secondary preamble are located on the first symbol of the unit frame, the preferred embodiment defining that the location of the primary preamble and/or the secondary preamble is on the first symbol of the unit frame, The terminal positioning and receiving the primary preamble and the secondary preamble are facilitated, which reduces the access time and improves the synchronization efficiency.
  • Embodiment 4 The present invention further provides a preferred embodiment, combining the technical solutions of the foregoing multiple embodiments, and FIG. 5 is a flowchart of a synchronization method in accordance with a preferred embodiment of the present invention, which is described in detail below with reference to FIG. Description: Step S502: Send a primary preamble and a secondary preamble in a superframe.
  • the primary preamble includes system bandwidth information
  • the secondary preamble carries cell/sector ID information.
  • the transmission order of the primary preamble and the secondary preamble is "secondary preamble-primary preamble-secondary preamble-X (X indicates that no preamble is transmitted on the corresponding unit frame)" or "secondary preamble-X-main preamble"
  • the auxiliary preamble is shown in Figure 2 or Figure 3.
  • Step S504 The terminal detects the primary preamble, performs time-frequency synchronization, and acquires system bandwidth information carried by the primary preamble.
  • Step S506 The terminal decodes the secondary preamble of the corresponding bandwidth according to the system bandwidth information, and acquires the cell/sector ID information from the secondary preamble.
  • Embodiment 5 This embodiment combines Embodiments 1 and 2 and a preferred embodiment thereof.
  • FIG. 6 is a structural block diagram of a control station according to an embodiment of the present invention, as shown in FIG. 6.
  • the control station includes: a sending module 62.
  • the sending module 62 is configured to send a synchronization preamble in a superframe, where the synchronization preamble is a primary preamble and two secondary preambles.
  • a code where the primary preamble carries system bandwidth information, and the secondary preamble carries cell/sector identification ID information.
  • the sending module 62 sends the synchronization preamble in one of the following manners on the four unit frames of the superframe: transmitting the secondary preamble on the first unit frame, and transmitting the primary preamble on the second unit frame, in the third Transmitting a secondary preamble on a unit frame; transmitting a secondary preamble on the first unit frame, transmitting a primary preamble on the third unit frame, and transmitting a secondary preamble on the fourth unit frame.
  • the control station may be a base station or a relay station.
  • Embodiment 6 This embodiment combines Embodiment 3 and a preferred embodiment thereof. In this embodiment, a terminal is provided.
  • the terminal includes: a receiving module 72, a main preamble detecting module 74, a first obtaining module 76, a secondary preamble detecting module 77, a second obtaining module 78, and a synchronizing module 79.
  • the receiving module 72 is configured to receive a synchronization preamble, where the synchronization preamble is a primary preamble and two secondary preambles, the primary preamble carries system bandwidth information, and the secondary preamble carries cell/sector identification ID information;
  • the code detection module 74 is connected to the receiving module 72 for detecting the main preamble received by the receiving module 72.
  • the first obtaining module 76 is connected to the main preamble detecting module 74 for acquiring the main preamble detecting module 74. Detecting the system bandwidth information carried in the main preamble; the auxiliary preamble detection module 77 is connected to the receiving module 72 for detecting the secondary preamble received by the receiving module 72.
  • the second obtaining module 78 is connected to the auxiliary
  • the preamble detection module 77 is configured to obtain the cell/sector identification ID information carried in the secondary preamble detected by the auxiliary preamble detection module 77.
  • the synchronization module 79 is connected to the first obtaining module 76 and the second obtaining module 78. For synchronizing according to the system bandwidth information acquired by the first obtaining module 76 and the cell/sector identification ID information acquired by the second obtaining module 78.
  • Embodiment 7 This embodiment combines Embodiments 5 and 6 and preferred embodiments thereof.
  • FIG. 8 is a transmission system of a synchronization preamble according to an embodiment of the present invention.
  • the synchronization preamble transmission system 0 includes a control station 2 and a terminal 4.
  • the structure of the control station 2 is the same as that of the control station described in the fifth embodiment.
  • the structure of the terminal 4 is the same as that of the terminal described in the sixth embodiment, and will not be described here.
  • the synchronization preamble is transmitted as one primary preamble and two secondary preambles, which reduces the configuration of one secondary preamble, and solves the problem that the SCH overhead is relatively large during the synchronization process. Furthermore, on the basis of ensuring synchronous access performance, the effect of reducing SCH overhead is achieved.
  • modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein.
  • the steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps are fabricated as a single integrated circuit module.
  • the invention is not limited to any specific combination of hardware and software.
  • the above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the scope of the present invention are intended to be included within the scope 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)
  • Synchronisation In Digital Transmission Systems (AREA)

Abstract

本发明公开了一种同步前导码发送方法、同步方法、装置及系统,该方法包括:在超帧中发送同步前导码,同步前导码包括一个主前导码和两个辅前导码,其中,主前导码携带系统带宽信息,辅前导码携带小区/扇区标识ID信息。本发明在保证同步接入性能的基础上,达到了降低SCH开销的效果。

Description

同步前导码发送方法、 同步方法、 装置及系统 技术领域 本发明涉及通信领域, 具体而言, 涉及一种同步前导码发送方法、 同步 方法、 装置及系统。 背景技术 作为一种多载波传输模式,正交频分复用( Orthogonal Frequency Division Multiplex, 简称为 OFDM )通过将一高速传输的数据流转换为一组氐速并行 传输的数据流, 使得系统对多径衰落信道频率选择性的敏感度大大降低, 而 循环前缀的引入, 又进一步增强了 系统抗符号间千扰 ( Inter-symbol Interference, 简称为 ISI )的能力, 除此之外的带宽利用率高、 实现简单等特 点使 OFDM 技术在无线通信流域的应用越来越广, 比如, 无线局域网 ( Wireless Local Area Network , 简称为 WL AN ) 系统、 基于正交频分复用多 址的 802.16e系统以及 802.16e下一代的演进 802.16m系统等; 于 OFDM 技术的系统。 对于移动通信系统,移动台通常借助同步信道( Synchronization Channel, 简称为 SCH )接入网络, 在同步信道中通过前导码 ( preamble )传输当前系 统的相关系统, 一般的接入步骤包括:
1 ) 时间、 频率同步;
2 ) 小区识别码 ( Cell ID )检测; 3 ) 广播消息读取。 经过上述步骤, 移动台 (Mobile Station, 简称为 MS )依据广播消息中 的信息, 开始后续接入过程。 在移动通信系统中, MS 接入可以分为初始接入和非初始接入过程, 其 中, 初始接入是指 MS电源开机上电接入系统过程, 而非初始过程即为切换 接入过程。 其中, 接入过程的一个重要的指标是接入时间, 接入时间越短, 系统性能越高, 但是由于接入过程需要借助 SCH实现, 而 SCH占用了一定 资源。 相关技术中, 同步前导码由一个主前导码和三个辅前导码组成, 分别 载在一个超帧的四个单位帧上, 在进行同步的过程中,造成系统的 SCH开销 比较大。 发明内容 本发明的主要目的在于提供一种同步前导码发送方法、 同步方法、 装置 及系统, 以解决同步过程中 SCH开销比较大的问题。 为了实现上述目的, 根据本发明的一个方面, 提供了一种同步前导码发 送方法。 才艮据本发明的同步前导码发送方法包括: 在超帧中发送同步前导码, 同 步前导码为一个主前导码和两个 i 前导码, 其中, 主同步前导码携带系统带 宽信息, 辅同步前导码携带小区 /扇区标识 ID信息。 进一步地, 在超帧中发送同步前导码包括: 在超帧的 4个单位帧上按照 以下方式之一发送同步前导码: 在第一单位帧上发送辅同步前导码, 在第二 单位帧上发送主同步前导码, 在第三单位帧上发送辅同步前导码; 在第一单 位帧上发送辅同步前导码, 在第三单位帧上发送主同步前导码, 在第四单位 帧上发送辅同步前导码。 进一步地, 主同步前导码和 /或辅同步前导码位于单位帧的第一个符号 上。 为了实现上述目的, 才艮据本发明的一个方面, 还提供了一种同步方法。 根据本发明的同步方法包括: 在超帧上接收同步前导码, 其中, 同步前 导码为一个主前导码和两个辅前导码, 主前导码携带系统带宽信息, 辅前导 码携带小区 /扇区标识 ID信息; 进行主前导码检测, 并获取主前导码中携带 的系统带宽信息; 进行辅前导码检测, 并获取辅前导码中携带的小区 /扇区标 识 ID信息; 才艮据系统带宽信息和小区 /扇区标识 ID信息进行同步。 进一步地, 在超帧上接收同步前导码包括: 在超帧的 4个单位帧上按照 以下方式之一接收同步前导码: 在第一单位帧上接收辅前导码, 在第二单位 帧上接收主前导码, 在第三单位帧上接收辅前导码; 在第一单位帧上接收辅 前导码, 在第三单位帧上接收主前导码, 在第四单位帧上接收辅前导码。 进一步地, 主前导码和 /或辅前导码位于单位帧的第一个符号上。 为了实现上述目的, 才艮据本发明的另一个方面, 提供了一种控制站。 才艮据本发明的控制站包括: 发送模块, 用于在超帧中发送同步前导码, 同步前导码为一个主前导码和两个库前前导码, 其中, 主前导码携带系统带宽 信息, 辅前导码携带小区 /扇区标识 ID信息。 进一步地, 发送模块在超帧的 4个单位帧上按照以下方式之一发送同步 前导码: 在第一单位巾贞上发送辅前导码, 在第二单位巾贞上发送主前导码, 在 第三单位帧上发送辅前导码; 在第一单位帧上发送辅前导码, 在第三单位帧 上发送主前导码, 在第四单位帧上发送 前导码。 为了实现上述目的, 居本发明的另一个方面, 还提供了一种终端。 根据本发明的终端包括: 接收模块, 用于接收同步前导码, 其中, 同步 前导码为一个主前导码和两个辅前导码, 主前导码携带系统带宽信息, 辅前 导码携带小区 /扇区标识 ID信息; 主前导码检测模块, 用于进行主前导码检 测; 第一获取模块, 用于获取主前导码中携带的系统带宽信息; 辅前导码检 测模块, 用于进行辅前导码检测; 第二获取模块, 用于获取辅前导码中携带 的小区 /扇区标识 ID信息; 同步模块, 用于根据系统带宽信息和小区 /扇区标 识 ID信息进行同步。 为了实现上述目的, 居本发明的又一个方面, 提供了一种同步前导码 的传输系统。 才艮据本发明的同步前导码的传输系统包括上述的控制站和上述的终端。 通过本发明, 釆用在超帧中发送同步前导码, 其中, 该前导码为一个主 前导码和两个辅前导码, 解决了同步过程中 SCH开销比较大的问题, 进而在 保证同步接入性能的基础上, 达到了降低 SCH开销的效果。 附图说明 此处所说明的附图用来提供对本发明的进一步理解, 构成本申请的一部 分, 本发明的示意性实施例及其说明用于解释本发明, 并不构成对本发明的 不当限定。 在附图中: 图 1是根据相关技术的超帧结构示意图; 图 2是才艮据本发明实施例的主前导码和辅前导码的示意图一; 图 3是才艮据本发明实施例的主前导码和辅前导码的示意图二; 图 4是才艮据本发明实施例的同步方法的流程图; 图 5是 居本发明优选实施例的同步方法的流程图; 图 6是 居本发明实施例的控制站的结构框图; 图 7是才艮据本发明实施例的终端的结构框图; 以及 图 8是才艮据本发明实施例的同步前导码的传输系统的结构框图。 具体实施方式 下文中将参考附图并结合实施例来详细说明本发明。 需要说明的是, 在 不冲突的情况下, 本申请中的实施例及实施例中的特征可以相互组合。 在本发明的下述实施例中的同步前导码均 于超帧进行发送的, 图 1 是根据相关技术的发送同步前导码的超帧结构示意图, 超帧由 4个单位帧组 成, 超帧控制信息位于超帧开始处的若千个符号上。 单位帧由 8个子帧单元 组成, 子帧单元分为下行子帧单元和上行子帧单元, 可才艮据系统进行配置。 每个子帧单元由 6个 OFDM符号组成。 实施例一 在本实施例中, 提供了一种同步前导码发送方法。 该方法包括: 在超帧上发送同步前导码, 该同步前导码为一个主前导码和两个辅前导 码, 其中, 该主前导码携带系统带宽信息, 该辅前导码携带小区 /扇区 ID信 息。 通过上述步 4聚, 发送的同步前导码为一个主前导码和两个辅前导码, 减 少了一个辅前导码的配置,避免了相关技术中同步过程中 SCH开销比较大的 问题, 进而在保证同步接入性能的基础上, 达到了降低 SCH开销的效果。 下面对上述步骤在超帧中发送同步前导码的一个优选的实施方式进行说 明, 在超帧的 4个单位帧上按照以下方式之一发送同步前导码: 在第一单位 帧上发送辅前导码, 在第二单位帧上发送主前导码, 在第三单位帧上发送辅 前导码; 在第一单位巾贞上发送辅前导码, 在第三单位巾贞上发送主前导码, 在 第四单位帧上发送辅前导码。 通过使用该优选实施例的发送方式, 将主前导 码放在单位帧的中间位置发送, 辅前导码在主前导码的两侧发送, 使得终端 有两次解调辅前导码的机会, 提高了辅前导码解调的准确率, 进而提高了同 步的准确性。 优选地, 主前导码和 /或辅前导码位于单位帧的第一个符号上。 该优选实 施例限定了主前导码和 /或辅前导码的位置在单位帧的第一个符号上,有利于 终端定位接收上述主前导码和辅前导码, 减少了接入的时间并提高了同步的 效率。 实施例二 本实施例综合了实施例一及其中的优选实施方式, 在本实施例中, 提供 了一种同步前导码的发送方法。 图 2是才艮据本发明实施例的主前导码和辅前导码的示意图一, 如图 2所 示, 同步信道 (同步前导码) 由一个主同步信道 (主前导码 P-Preamble ) 和 两个辅同步信道 (辅前导码 S-Preamble ) 组成, 图 2中为携带系统控制信息 的超帧头( Superframe Header ), 该超帧头在超帧中的第一个单位帧的第一个 子帧上发送)。 主前导码在超帧中发送一次, 在超帧中的第 2个 802.16m单 位帧的第一个符号发送主前导码, 辅前导码在 802.16m超帧中发送 2次, 在 超帧中的第 1 , 3个 16m单位帧的第一个符号发送。 图 3是才艮据本发明实施例的主前导码和辅前导码的示意图一, 如图 3所 示, 主前导码在 802.16m超帧中发送一次, 在超帧中的第 3个 802.16m单位 帧的第一个符号发送主前导码, 辅前导码在 802.16m超帧中发送 2次, 在超 帧中的第 1 , 4个 16m单位帧的第一个符号发送。 通过本优选实施例, 在超帧中的第 2或 3个单位帧的第一个符号发送主 前导码, 在超帧中第 1 , 3或者第 1 , 4位置发送辅前导码, 减少了同步过程 中 SCH开销比较大的问题, 进而在保证同步接入性能的基础上, 达到了降低 SCH开销的效果。 实施例三 在本实施例中, 提供了一种同步方法。 图 4是根据本发明实施例的同步 方法的流程图, 如图 4所示, 包括: 步骤 S402, 在超帧上接收同步前导码, 其中, 同步前导码为一个主前导 码和两个辅前导码, 主前导码携带系统带宽信息, 辅前导码携带小区 /扇区标 识 ID信息; 步骤 S404,进行主前导码检测,并获取主前导码中携带的系统带宽信息。 步骤 S406, 进行辅前导码检测, 并获取辅前导码中携带的小区 /扇区标 识 ID信息。 步骤 S408 , 根据系统带宽信息和小区 /扇区标识 ID信息进行同步。 通过上述步 4聚, 居对主前导码检测和对两个 前导码检测的检测结果 进行同步, 在保证同步接入性能的情况下, 只对两个辅前导码进行解调, 减 少了接入时间并降低了 SCH的开销。 下面对步骤 S402 中的在超帧上接收同步前导码的一个优选的实施方式 进行说明。 在该优选实施例中, 在超帧的 4个单位帧上按照以下方式之一接 收同步前导码: 在第一单位帧上接收辅前导码, 在第二单位帧上接收主前导 码, 在第三单位帧上接收辅前导码; 在第一单位帧上接收辅前导码, 在第三 单位帧上接收主前导码, 在第四单位帧上接收辅前导码。 通过使用该优选实 施例的接收方式, 在单位帧的中间位置接收主前导码, 在主前导码的两侧接 收辅前导码, 使得终端有两次接收并解调辅前导码的机会, 提高了辅前导码 解调的准确率, 进而提高了同步的准确性。 优选地, 主前导码和 /或辅前导码位于单位帧的第一个符号上, 该优选实 施例限定了主前导码和 /或辅前导码的位置在单位帧的第一个符号上,有利于 终端定位接收上述主前导码和辅前导码, 减少了接入的时间并提高了同步的 效率。 实施例四 本发明还提供了一个优选实施例, 结合了上述多个实施例的技术方案, 图 5是 居本发明优选实施例的同步方法的流程图, 下面结合图 5进行详细 描述: 步骤 S502, 超帧中发送主前导码和辅前导码。 其中, 主前导码包含系统 带宽信息, 辅前导码携带小区 /扇区 ID信息。 主前导码和辅前导码的发送顺 序为 "辅前导码一主前导码一辅前导码一 X ( X表示对应单位帧上不发送前 导码)" 或 "辅前导码一 X—主前导码一 辅前导码", 具体发送位置如图 2或 图 3所示。 步骤 S504, 终端检测主前导码, 进行时频同步, 并获取主前导码携带的 系统带宽信息。 步骤 S506, 终端才艮据系统带宽信息, 解码对应带宽的辅前导码, 从辅前 导码中获取小区 /扇区 ID信息。 实施例五 本实施例综合了实施例一、 二及其中的优选实施方式, 在本实施例中提 供了一种控制站, 图 6是根据本发明实施例的控制站的结构框图, 如图 6所 示, 该控制站包括: 发送模块 62 , 下面对上述结构进行详细描述: 发送模块 62 , 用于在超帧中发送同步前导码, 该同步前导码为一个主前 导码和两个辅前导码, 其中, 该主前导码携带系统带宽信息, 该辅前导码携 带小区 /扇区标识 ID信息。 优选地, 发送模块 62在超帧的 4个单位帧上按照以下方式之一发送同 步前导码: 在第一单位帧上发送辅前导码, 在第二单位帧上发送主前导码, 在第三单位帧上发送辅前导码; 在第一单位帧上发送辅前导码, 在第三单位 帧上发送主前导码, 在第四单位帧上发送辅前导码。 需要说明的是, 在实际系统中, 控制站可以为基站或中继站。 实施例六 本实施例综合了实施例三及其中的优选实施方式, 在本实施例中提供了 一种终端, 图 7是才艮据本发明实施例的终端的结构框图, 如图 7所示, 该终 端包括: 接收模块 72、 主前导码检测模块 74、 第一获取模块 76、 辅前导码 检测模块 77、 第二获取模块 78和同步模块 79, 下面对上述结构进行详细描 述: 接收模块 72 , 用于接收同步前导码, 其中, 同步前导码为一个主前导码 和两个辅前导码, 主前导码携带系统带宽信息, 辅前导码携带小区 /扇区标识 ID信息; 主前导码检测模块 74, 连接至接收模块 72, 用于对接收模块 72接 收到的主前导码进行检测; 第一获取模块 76, 连接至主前导码检测模块 74, 用于获取主前导码检测模块 74 检测到的主前导码中携带的系统带宽信息; 辅前导码检测模块 77, 连接至接收模块 72 , 用于对接收模块 72接收到的辅 前导码进行检测; 第二获取模块 78, 连接至辅前导码检测模块 77, 用于获 取辅前导码检测模块 77检测到的辅前导码中携带的小区 /扇区标识 ID信息; 同步模块 79, 连接至第一获取模块 76和第二获取模块 78, 用于根据第一获 取模块 76获取的系统带宽信息和第二获取模块 78获取的小区 /扇区标识 ID 信息进行同步。 实施例七 本实施例综合了实施例五、 六及其中的优选实施方式, 在本实施例中提 供了一种同步前导码传输系统, 图 8是根据本发明实施例的同步前导码的传 输系统的结构框图, 如图 8所示, 该同步前导码传输系统 0包括控制站 2和 终端 4。 控制站 2的结构和实施例五描述的控制站结构相同, 终端 4的结构和实 施例六描述的终端结构相同, 在此不再赞述。 综上所述, 通过本发明的上述实施例, 发送同步前导码为一个主前导码 和两个辅前导码, 减少了一个辅前导码的配置, 解决了同步过程中 SCH开销 比较大的问题, 进而在保证同步接入性能的基础上, 达到了降低 SCH开销的 效果。 显然, 本领域的技术人员应该明白, 上述的本发明的各模块或各步骤可 以用通用的计算装置来实现, 它们可以集中在单个的计算装置上, 或者分布 在多个计算装置所组成的网络上, 可选地, 它们可以用计算装置可执行的程 序代码来实现, 从而, 可以将它们存储在存储装置中由计算装置来执行, 并 且在某些情况下, 可以以不同于此处的顺序执行所示出或描述的步骤, 或者 将它们分别制作成各个集成电路模块, 或者将它们中的多个模块或步骤制作 成单个集成电路模块来实现。 这样, 本发明不限制于任何特定的硬件和软件 结合。 以上所述仅为本发明的优选实施例而已, 并不用于限制本发明, 对于本 领域的技术人员来说, 本发明可以有各种更改和变化。 凡在本发明的 ^"神和 原则之内, 所作的任何修改、 等同替换、 改进等, 均应包含在本发明的保护 范围之内。

Claims

权 利 要 求 书
1. 一种同步前导码发送方法, 其特征在于, 包括:
在超帧中发送同步前导码, 所述同步前导码为一个主前导码和两个 辅前导码, 其中, 所述主同步前导码携带系统带宽信息, 所述辅同步前 导码携带小区 /扇区标识 ID信息。
2. 根据权利要求 1所述的方法, 其特征在于, 在超帧中发送同步前导码包 括:
在所述超帧的 4 个单位帧上按照以下方式之一发送所述同步前导 码:
在第一单位帧上发送辅同步前导码, 在第二单位帧上发送主同步前 导码, 在第三单位帧上发送辅同步前导码;
在所述第一单位帧上发送辅同步前导码, 在第三单位帧上发送主同 步前导码, 在第四单位帧上发送辅同步前导码。
3. 根据权利要求 2所述的方法, 其特征在于,
所述主同步前导码和 /或所述库前同步前导码位于所述单位帧的第一 个符号上。
4. 一种同步方法, 其特征在于, 包括:
在超帧上接收同步前导码, 其中, 所述同步前导码为一个主前导码 和两个辅前导码, 所述主前导码携带系统带宽信息, 所述辅前导码携带 小区 /扇区标 i只 ID信息;
进行主前导码检测, 并获取所述主前导码中携带的系统带宽信息; 进行辅前导码检测,并获取所述辅前导码中携带的小区 /扇区标识 ID 信息;
根据所述系统带宽信息和小区 /扇区标识 ID信息进行同步。
5. 根据权利要求 4所述的方法, 其特征在于, 在超帧上接收同步前导码包 括:
在所述超帧的 4 个单位帧上按照以下方式之一接收所述同步前导 码:
在第一单位帧上接收辅前导码, 在第二单位帧上接收主前导码, 在 第三单位帧上接收辅前导码;
在所述第一单位巾贞上接收辅前导码 ,在第三单位巾贞上接收主前导码 , 在第四单位帧上接收辅前导码。
6. 根据权利要求 5所述的方法, 其特征在于,
所述主前导码和 /或所述辅前导码位于所述单位帧的第一个符号上。
7. —种控制站, 其特征在于, 包括:
发送模块, 用于在超帧中发送同步前导码, 所述同步前导码为一个 主前导码和两个辅前导码, 其中, 所述主前导码携带系统带宽信息, 所 述辅前导码携带小区 /扇区标识 ID信息。
8. 根据权利要求 7所述的控制站, 其特征在于,
所述发送模块在所述超帧的 4个单位帧上按照以下方式之一发送所 述同步前导码:
在第一单位帧上发送辅前导码, 在第二单位帧上发送主前导码, 在 第三单位帧上发送辅前导码;
在所述第一单位巾贞上发送辅前导码 ,在第三单位巾贞上发送主前导码 , 在第四单位帧上发送 $ 前导码。
9. 一种终端, 其特征在于, 包括:
接收模块, 用于接收同步前导码, 其中, 所述同步前导码为一个主 前导码和两个辅前导码, 所述主前导码携带系统带宽信息, 所述辅前导 码携带小区 /扇区标识 ID信息;
主前导码检测模块, 用于进行主前导码检测;
第一获取模块, 用于获取所述主前导码中携带的系统带宽信息; 辅前导码检测模块, 用于进行辅前导码检测; 第二获取模块, 用于获取所述辅前导码中携带的小区 /扇区标识 ID 信息;
同步模块, 用于根据所述系统带宽信息和所述小区 /扇区标识 ID信 息进行同步。
10. —种同步前导码的传输系统, 其特征在于, 包括: 权利要求 8所述的控 制站和权利要求 9所述的终端。
PCT/CN2010/077598 2010-07-09 2010-10-08 同步前导码发送方法、同步方法、装置及系统 WO2012003671A1 (zh)

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