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WO2011038597A1 - Procédé et système de transmission de données en phase/en quadrature - Google Patents

Procédé et système de transmission de données en phase/en quadrature Download PDF

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Publication number
WO2011038597A1
WO2011038597A1 PCT/CN2010/074314 CN2010074314W WO2011038597A1 WO 2011038597 A1 WO2011038597 A1 WO 2011038597A1 CN 2010074314 W CN2010074314 W CN 2010074314W WO 2011038597 A1 WO2011038597 A1 WO 2011038597A1
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WO
WIPO (PCT)
Prior art keywords
data
cpri
block
axc
rec
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PCT/CN2010/074314
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English (en)
Chinese (zh)
Inventor
邓志行
李继洲
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ZTE Corp
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ZTE Corp
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Publication date
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Anticipated expiration legal-status Critical
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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
    • H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
    • H04L27/36—Modulator circuits; Transmitter circuits

Definitions

  • the present invention relates to the field of communications, and in particular to in-phase correlation (In-Phase/Quardrature, which is based on the Common Public Radio Interface (CPRI) protocol.
  • CPRI Common Public Radio Interface
  • IQ In-Phase/Quardrature
  • REC Radio Equipment Controller
  • RE Radio Equipment
  • 3GPP 3rd Generation Partnership Project
  • the CPRI protocol enables flexible and effective differences between products, and enables all parts of the base station to better from their respective fields. Benefit from technological advances.
  • CPRI was originally developed for Wideband Code Division Multiple Access (WCDMA).
  • WCDMA Wideband Code Division Multiple Access
  • the latest CPRI4.0 protocol is added.
  • Simultaneous transmission of the system. 1 is a schematic diagram of a CPRI protocol structure according to the related art. As shown in FIG. 1, a physical layer (layer 1) defines a rate, an encoding, a frame format, and an in-phase orthogonality of an CPRI interface (In-Phase/Quardrature, referred to as IQ).
  • IQ in-phase orthogonality of an CPRI interface
  • Link Layer defines the frame format of the control plane data, including , IQ data (Date), specific attributes (Vendor Specific), Ethernet (Ethernet), HDLC, LI Inband Protocol
  • FIG. 2 is a schematic diagram of the radio frame structure of the CPRI protocol according to the related art.
  • a radio frame is composed of a Node B frame.
  • No. Node B Frame Number, BFN for short
  • the superframe contains 256 Basic Frames
  • the basic frame includes the Word (Word)
  • W in Figure 2 represents the number of Words in the basic frame (word number in basic frame)
  • Y represents Word.
  • Byte byte number within word
  • X represents the basic number of frames (the basic frame number, where 256 )
  • the length of the Radio Frame is 10ms.
  • a special synchronization word (Comma byte) is inserted into the control word byte of the Radio Frame to implement 10ms clock synchronization between the REC and the RE.
  • FIG. 3 is a schematic diagram of the basic frame structure at the 1.2288G line rate of the CPRI protocol according to the related art.
  • W represents the number of words in the Basic Frame.
  • Y represents the number of bytes contained in word in Basic Frame.
  • the Antenna xCarrier Container (AxC Container for short) is
  • the IQ-data block may contain multiple AxC Containers, and the AxC Container is used for IQ data carrying UTRA-FDD (WCDMA), WiMAX, E-UTRA (LTE), depending on the size of the IQ data block.
  • WCDMA UTRA-FDD
  • WiMAX WiMAX
  • E-UTRA LTE
  • mapping Method 1 is an IQ-based method, which can be applied to UTRA-FDD
  • WiMAX E-UTRA, which is characterized by a mapping method based on a common multiple of the IQ data sampling rate and the basic frame rate;
  • Mapping Method 2 is a WiMAX-based method that can be applied to WiMAX. It is characterized in that the IQ data carried has thousands of symbol periods in one frame, and there are thousands of IQ samples in one symbol period.
  • Mapping Method 3 is a compatibility mode that can be applied to UTRA-FDD, WiMAX, and E-UTRA. It is characterized in that the above three formats are compatible with transmission on interfaces compatible with CPRI versions 1 and 2, and IQ-data is divided into Thousands of AxC Containers of the same size,
  • a primary object of the present invention is to provide an IQ data transmission scheme based on the CPRI protocol to at least solve one of the above problems.
  • the in-phase orthogonal IQ data transmission method based on the general public radio interface CPRI protocol includes: determining an IQ mapping manner adopted by each of one or more standards, and determining an IQ mapping corresponding to each standard The information of the antenna carrier container AxC Container in the mode and the parameter of the corresponding IQ mapping mode of the system; the IQ Data Block of the basic frame is divided, and the divided IQ Data Block includes: AxC for carrying all standards Part of the Container, part of the AxC Container Block Timing Reference CI for the antenna carrier container block AxC Container Block of each level of the wireless device; the wireless device controller REC or the wireless device RE according to the determined IQ mapping method corresponding to the standard in the CPRI The wireless service IQ data of the system is transmitted and/or restored on the interface.
  • an in-phase orthogonal IQ data transmission system based on a general public radio interface CPRI protocol includes a wireless device controller REC, a wireless device RE, and the REC includes: a determining module, configured to determine each of one or more standards The IQ mapping method used by the system, and determines the information of the antenna carrier container AxC Container under the IQ mapping mode of each system and the parameter of the corresponding IQ mapping mode of the system; the dividing module is used for the basic frame
  • the IQ data block is divided into IQ data blocks, and the divided IQ Data Block includes: a part for carrying all types of AxC Containers, and is used for providing AxC Container Block timing reference CI for antenna carrier container block AxC Container Block of each level of wireless equipment.
  • the REC or the wireless device transmits and/or restores the wireless service IQ data of the standard on the CPRI interface according to the determined IQ mapping manner corresponding to the standard.
  • a different system selection IQ mapping method is used, and the IQ Data block of the basic frame is drawn out for the part carrying the AxC Container, and the basic frame level timing reference is provided for the AxC Container Block of each level RE.
  • the part solves the problem that the CRPI protocol existing in the related technology does not support transmission of multiple standards on the same CRPI interface, thereby making the universal interface suitable for multi-standard wireless service IQ data, and enhancing the compatibility and flexibility of the interface.
  • FIG. 1 is a schematic diagram of a CPRI protocol structure according to the related art
  • FIG. 2 is a schematic diagram of a radio frame structure of a CPRI protocol according to the related art
  • FIG. 3 is a 1.2288G line rate of a CPRI protocol according to the related art.
  • FIG. 4 is a flowchart of an IQ data transmission method according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of an AxC Container Block of Mapping Method 1 according to an embodiment of the present invention
  • FIG. 7 is a system block diagram of a two-stage RE cascading application according to an embodiment of the present invention
  • FIG. 8 is a timing diagram of a downlink AxC Container Block according to an embodiment of the present invention
  • FIG. 10 is a schematic diagram of an AxC Container Block of Mapping Method 3 according to an embodiment of the present invention
  • FIG. 11 is a schematic diagram of an AxC Container Block of Mapping Method 2 according to an embodiment of the present invention.
  • an IQ data transmission method based on a CPRI protocol includes: determining an IQ mapping mode used by each system for one or more standards, and determining each standard format.
  • the mapping mode transmits and/or restores the wireless service IQ data of the standard on the CPRI interface.
  • 4 is a flowchart of an IQ data transmission method according to an embodiment of the present invention. As shown in FIG.
  • the method includes the following steps S402 to S406: Step S402, determining each system for one or more standards.
  • the IQ mapping method used, and determining the information of the antenna carrier container AxC Container in the IQ mapping mode corresponding to each system and the parameter of the corresponding IQ mapping mode of the system; preferably, in this step, the data may be applied according to the actual application.
  • a method IQ mapping method is selected from Mapping Method 1 to 3 to determine the size of a certain RE, an antenna carrier, a standard AxC Container N AxC , and related parameters of its IQ mapping method.
  • Step S404 the IQ data block of the basic frame is divided into IQ data blocks, and the divided IQ is divided.
  • the Data Block includes: a portion for carrying the AxC Container of the ownership system, and a portion for providing an AxC Container Block Timing Reference CI for the antenna carrier container block AxC Container Block of each level of the wireless device; preferably, the divided IQ Data Block is further This includes the reserved bit portion, which is explained below.
  • the number of bits occupied by the AxC Container is N AxCi ; the second part provides a basic frame level timing reference (AxC Container Block Chip Indication, referred to as CI) for the AxC Container Block of each level of RE, and the timing reference can only be uplink
  • the basic frame is valid, the number of occupied bits is N CI (Nci is equal to the number of cascaded RE nodes).
  • Nci is equal to the number of cascaded RE nodes.
  • this part can occupy no bits; the third part is reserved bits, which can be filled with "0" by default. Can be used in specific applications for user-defined data channels.
  • Step S406 The REC or the RE sends and/or restores the wireless service IQ data of the standard on the CPRI interface according to the determined IQ mapping manner corresponding to the standard. That is, the REC or RE may transmit and recover the radio service IQ signals of the respective REs on the CPRI interface according to the selected mapping method. It should be noted that the REC can transmit related parameters required for multi-standard IQ wireless service data transmission to each RE through a control management channel, which includes information of the IQ data block division of the CPRI basic frame and the multi-standard IQ of each AxC Container. Configuration information about the mapping method.
  • the Mapping Methods 1 to 3 which can be used in the present embodiment will be described below.
  • This method is a multi-standard IQ mapping method based on IQ symbol period, which can be used for IQ data signals with symbol periods. The purpose is to make the symbols of IQ data be uniformly loaded into the CPRI frame as much as possible. Higher bandwidth utilization, described as follows:
  • an AxC Container Block contains N SYM AxC
  • This method is a multi-standard IQ mapping method compatible with CPRI release 1/2. The purpose is to be compatible with transmitting multi-standard IQ data on the existing CPRI release 1/2 interface, and making IQ data. Load as evenly as possible into the CPRI frame.
  • an AxC Container Block is transmitted in an AxC Container Group.
  • One AxC Container Group contains N c AxC Containers, one AxC Container Block contains one AxC Group and N v padding frames, and one AxC Group contains NA Road AxC.
  • the padding bits can be used to transmit user-defined data channels depending on the application.
  • the N AxC Containers can independently select the Mapping Method 1-3 described in the different step S402, but the total number of bits of the three parts in the step S404 is not required to exceed the basic frame. The number of IQ data block bits.
  • the method for transmitting the radio service IQ signal of each standard of each RE on the CPRI interface is exemplified by the REC or the RE in step S406.
  • the REC or the RE For the downlink, at the CPRI transmitting end of the REC, all AxC of the AxC Container
  • the period boundary of the Container Block is referenced by the 10 ms frame header of the CPRI sender.
  • Each RE receiver uses the 10 ms frame header recovered by the CPRI receiving port of the Slave Port as the timing reference to restore the period boundary of the AxC Container Block.
  • the periodic boundary of the AxC Container Block of each level RE is referenced by the 10 ms frame header recovered by the CPRI receiving port of its respective node Slave Port, and the CP Port of the RE Master Port or REC
  • the CI of the receiving port is the timing reference.
  • the REC or RE will compare the IQ data of different wireless systems of different REs.
  • Embodiment 2 This embodiment combines Embodiment 1 and its preferred embodiment. This embodiment is a preferred embodiment of dual mode transmission for CDMA and LTE (5Mhz bandwidth) at a line rate of 1.2288 Gbps.
  • the Mapping Method 1 is used, including the following.
  • Step 4 Step 1A, select the IQ mapping method for CDMA, LTE (5Mhz bandwidth) as Mapping Method 1, and then determine the size of its AxC Container N AxC and its associated parameters of the IQ mapping method.
  • the IQ data related parameters of CDMA and LTE (5Mhz bandwidth) are as shown in Table 1.
  • one IQ data contains 2 times the IQ data and 2 Receive diversity antenna data, its IQ data sample width M' Is 4.
  • FIG. 6 is a schematic diagram of the division of the IQ data block according to the embodiment of the present invention.
  • the IQ data block of the basic frame is divided into three parts, and the first part is AxC.
  • the second part provides CI for "AxC Container Block" of each level RE, only It is valid for the uplink basic frame, and the occupied number of bits is NCI (the NCI is equal to the number of cascading RE nodes).
  • this part does not occupy any bits; the third part is reserved bits, and the default is filled with "0". It can be used for user-defined data channels depending on the application. According to the application, at the line rate of 1.2288 Gbps, it is necessary to support the 8-level RE cascading.
  • Mode group 14 1 232 ( 0, 8 ) ( 8, 0 ) and 2 Step 1C, REC or RE will send and recover CDMA, LTE of each RE on the CPRI interface according to the method selected in Mapping Method 1 ⁇ 3 Wireless service IQ signal.
  • 5 is a schematic diagram of an AxC Container Block of Mapping Method 1 according to an embodiment of the present invention, wherein point A represents: @REC:From Local 10ms @RE:From Local Slave CPRI Recoverd 10ms, where point B represents: @RE :From Slave CPRI Recoverd 10ms, as shown in Figure 8, the mapping and recovery of downlink IQ data is based on 10ms Radio Frame as a timing reference.
  • FIG. 7 is a system block diagram of a two-stage RE cascading application according to an embodiment of the present invention
  • FIG. 9 is a schematic diagram of a timing method of an uplink AxC Container Block according to an embodiment of the present invention, where point A represents: @RE#N: From Local Slave CPRI Recoverd 10ms, where point B indicates: @REC:From "CF'for RE#N Recoverd 10ms, as shown in Figure 9, the mapping and recovery of uplink IQ data depends on the CI of each level of RE as the timing reference.
  • the 10 ms Radio Frame recovered by the Slave Port of the RE is used as the timing reference.
  • Embodiment 3 This embodiment combines Embodiment 1 and its preferred embodiments. This embodiment is an application example of CDMA and WiMAX dual mode at 1.2288 Gbps.
  • MAP uses Mapping Method 3
  • WiMAX uses Mapping Method 2, including the following steps. 4: Step 2A, first determine the IQ mapping method, CDMA is selected as Mapping Method 3, WiMAX is selected as Mapping Method 2, and then its size AxC Container NAxC, and its associated parameters of the IQ mapping method are determined.
  • the IQ data parameters of the CDMA are as shown in Table 4, wherein an IQ data at an uplink 1.2288 Mhz rate at the CPRI interface includes twice the IQ data and the two received diversity antenna data, and its IQ.
  • the data sample width M' is 4.
  • the IQ data parameters of WiMAX are as shown in Table 5. Table 4
  • FIG. 10 is a schematic diagram of an AxC Container Block of Mapping Method 3 according to an embodiment of the present invention.
  • FIG. 11 is a schematic diagram of the AxC Container Block of the Mapping Method 2 according to the embodiment of the present invention. Table 6
  • WiMAX IQ mapping parameter Mapping Method 2
  • the occupied bit number is NCI (the NCI is equal to the number of cascading RE nodes).
  • Step 4 Poly 2A calculated by the WiMAX NAxC stars 48, and 32 is a CDMA-N AxC, at 1.2288Gbps, compatibility mode IQ Data Block is divided into seven AxC Container, N AxC size of 32. According to the application, the configuration example of the IQ Data Block of this example is shown in Table 8: Table 8
  • Step 2C REC or RE sends and recovers the CDMA, WiMAX wireless service IQ signals of the REs on the CPRI interface according to the method selected in Mapping Method 1 ⁇ 3.
  • the method for the timing recovery of the downlink and uplink AxC Container Blocks of the standard IQ mapping is similar to that of the first embodiment, and details are not described herein again.
  • the REC may transmit the relevant parameters required for multi-standard IQ wireless service data transmission to each RE through the control management channel.
  • Embodiment 4 provides a CPRI-based protocol in this implementation.
  • An IQ data transmission system for applying the method in the above embodiments, comprising a wireless device controller REC, a wireless device RE, wherein the REC comprises: a determining module, configured to determine each of one or more standards The IQ mapping method adopted by the system, and determining the information of the antenna carrier container AxC Container under the IQ mapping mode corresponding to each standard and the parameter of the corresponding IQ mapping mode of the standard; the dividing module, which is used for the IQ of the basic frame
  • the data block IQ Data Block is divided, and the divided IQ Data Block includes: a part for carrying all types of AxC Containers, and is used for providing an AxC Container Block timing reference CI for the antenna carrier container block AxC Container Block of each level of the wireless device.
  • the REC or the wireless device transmits and/or restores the CPRI interface according to the determined IQ mapping manner corresponding to the standard. Wireless service IQ data.
  • the periodic boundary of the AxC Container Block of each level RE is restored by the 10 millisecond frame header of the local slave port's CPRI receiver.
  • the primary port of each level RE or the CPRI receiving port of the REC is the timing reference for the RE of the upper level RE.
  • the CPRI sender of the REC all AxC of the AxC Container
  • the period boundary of the Container Block is referenced by the 10 ms frame header of the CPRI sender.
  • Each RE uses the 10 ms frame header recovered from the CPRI receiving port of the port as the timing reference to restore the period boundary of the AxC Container Block.
  • the REC or RE is also used to map one or more types of IQ data from the period boundary of the AxC Container Block to the AxC Container corresponding to the standard; at the CPRI receiving end, REC Or the RE is also used to restore one or more types of IQ data from the AxC Container according to the periodic boundary of the restored AxC Container Block and the parameters required for the IQ data transmission, wherein the parameters required for the IQ data transmission include: The information of the IQ Data Block partition and the parameters of the IQ mapping method corresponding to the standard.
  • the universal interface is suitable for multi-standard wireless service IQ data, which enhances the compatibility and flexibility of the interface.
  • the multi-standard IQ data mapping method is based on the three kinds of IQ mapping methods provided by CPRI4.0, which is beneficial to the compatibility upgrade of the CPRI interface.
  • IQ data mapping is performed with the CI as the timing reference in the uplink stages, especially in the case of the chain network, the uplink CPRI interface processing can be simplified.
  • 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, or they may be separately fabricated into individual integrated circuit modules, or they may be Multiple modules or steps are made into 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)

Abstract

L'invention porte sur un procédé et un système de transmission de données en phase/en quadrature (IQ). Le procédé comprend la détermination d'une manière de mappage IQ pour chaque mode d'un ou plusieurs modes, et la détermination d'informations de contenant antenne-support dans la manière de mappage IQ correspondant à chaque mode, et des paramètres de la manière de mappage IQ pour le mode; la division d'un bloc de données IQ d'une trame basique, le bloc de données IQ divisé comprenant une partie destinée à transporter des contenants antenne-support de tous les modes et une partie destinée à fournir une indication de fragment (CI) de référence de temps pour le bloc de contenant antenne-support d'équipement radio (RE) à tous les niveaux; et selon la manière de mappage IQ déterminée correspondant à chaque mode, un contrôleur d'équipement radio (REC) ou le RE envoie et/ou récupère des données IQ de service radio pour le mode par l'intermédiaire d'une interface radio publique commune (CPRI). Avec le procédé et le système selon l'invention, la CPRI peut être appliquée à des données IQ de service radio multimode, et la compatibilité et la flexibilité de la CPRI sont également améliorées.
PCT/CN2010/074314 2009-09-29 2010-06-23 Procédé et système de transmission de données en phase/en quadrature Ceased WO2011038597A1 (fr)

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CN102315898B (zh) * 2010-06-30 2014-02-26 华为技术有限公司 Iq数据传输方法和装置
CN102316517A (zh) * 2010-06-30 2012-01-11 华为技术有限公司 Iq数据传输方法和装置
KR20120018266A (ko) * 2010-08-20 2012-03-02 삼성전자주식회사 직교 주파수 분할 다중 접속 방법을 사용하는 무선 통신 시스템에서 기지국의 전력 증폭기 소모 전력 제어 방법 및 장치
CN102307395A (zh) * 2011-09-02 2012-01-04 中兴通讯股份有限公司 用cpri接口传输gsm/edge的iq数据的方法
CN105763502B (zh) * 2012-03-23 2019-01-18 京信通信系统（中国）有限公司 同相正交数据的发送、接收方法及装置
CN103326810B (zh) * 2012-03-23 2017-03-01 京信通信系统（中国）有限公司 同相正交数据的发送、接收方法及装置
EP2876971B1 (fr) * 2012-07-17 2018-11-07 ZTE Corporation Procédé et dispositif de transmission de données
CN104539388B (zh) * 2014-12-08 2020-05-05 中兴通讯股份有限公司 数据发送、接收方法和装置
WO2016095100A1 (fr) * 2014-12-16 2016-06-23 Telefonaktiebolaget Lm Ericsson (Publ) Appareil et procédé de commutation d'interface radio (ri)
WO2017020190A1 (fr) * 2015-07-31 2017-02-09 华为技术有限公司 Procédé d'attribution de ressources, procédé de transmission de données, et appareil et système correspondants
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WO2017088157A1 (fr) * 2015-11-26 2017-06-01 华为技术有限公司 Procédé d'attribution de bit pour une interface radio publique commune, et dispositif associé
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