WO2011038597A1 - Method and system for transmitting in-phase quadrature data - Google Patents

Abstract

A method and a system for transmitting In-phase Quadrature (IQ) data are provided. The method includes that determining an IQ mapping manner for each of one or more modes, and determining antenna-carrier container information in the IQ mapping manner corresponding to each mode, and the parameters of the IQ mapping manner for the mode; dividing an IQ data block of a basic frame, wherein the divided IQ data block includes a part for carrying antenna-carrier containers of all the modes and a part for providing a timing reference CI (Chip Indication) for the antenna-carrier container block of Radio Equipment (RE) at all levels; and according to the determined IQ mapping manner corresponding to each mode, a Radio Equipment Controller (REC) or the RE transmits and/or recovers radio service IQ data for the mode via a Common Public Radio Interface (CPRI). With the method and system according to the invention, the CPRI can be applied to multi-mode radio service IQ data, and compatibility and flexibility of the CPRI is also improved.

Description

 TECHNICAL FIELD 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. For IQ) data transmission methods and systems. BACKGROUND OF THE INVENTION The General Public Radio Interface Alliance is an industrial cooperative organization dedicated to the development of major interface specifications between Radio Equipment Controller (REC) and Radio Equipment (RE). As a 3rd Generation Partnership Project (3GPP), 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.

As an industry-recognized, general-purpose, cost-based wireless interface, CPRI was originally developed for Wideband Code Division Multiple Access (WCDMA). The latest CPRI4.0 protocol is added. Support for Worldwide Interoperability for Microwave Access (WIMAX) and Long Term Evolution (LTE), however, the latest CPRI 4.0 protocol still does not explicitly support other wireless standards and multiple wireless technologies. 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). Data mapping and the like, including: Time Division Muliplexing, Electrical Transmission, Optical Transmission; Link Layer (Layer 2) defines the frame format of the control plane data, including , IQ data (Date), specific attributes (Vendor Specific), Ethernet (Ethernet), HDLC, LI Inband Protocol

), Ζ表示超帧数（ hyperframe number, 其中， 150个 hyperframe=10ms )。 Radio Frame的时间长度为 10ms, 在 Radio Frame的控制字字节中插入特殊的同步字 （ Comma byte ), 就可以实现 REC 和 RE之间的 10ms时钟同步。 The multiframe structure is defined in the CPRI interface specification, and FIG. 2 is a schematic diagram of the radio frame structure of the CPRI protocol according to the related art. As shown in FIG. 2, in WCDM A, a radio frame is composed of a Node B frame. No. (Node B Frame Number, BFN for short), containing 150 super Hyper Frame, 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), and Y represents Word. Byte (byte number within word), X represents the basic number of frames (the basic frame number, where 256

), Ζ indicates the number of superframes (hyperframe number, of which 150 hyperframe=10ms). 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.

Basic Frame is the basic unit of the CPRI frame structure. 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. As shown in FIG. 3, W represents the number of words in the Basic Frame. The value of W is 0~15, the word of W=0 is control word, the other 15 words are IQ Data Block; Y represents the number of bytes contained in word in Basic Frame. The period of the Basic Frame is T=l/3.84Mhz, and the CPRI protocol specifies the Basic Frame rate fc=l/T=3.84Mhz as the chip rate of WCDMA, where the IQ-data block is used to carry the wireless service IQ data (referred to as " IQ data ";). The Antenna xCarrier Container (AxC Container for short) is

As part of the IQ-data block, 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. In the system, three kinds of IQ mapping methods are also provided in the protocol, which can also be called mapping method: 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,

Mapping Method 1-3 provides the IQ mapping method of UTRA-FDD (WCDMA), WiMAX, E-UTRA (LTE), and the corresponding method should be selected according to the actual application. However, for other 2G and 3G systems, for example, Global System for Mobile Communication (GSM), CDMA, TDSCDMA, etc., the protocol does not provide support. In addition, for the transmission method of multiple standards on the same CPRI interface, The agreement also did not provide support. SUMMARY OF THE INVENTION 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. In order to achieve the above object, according to an aspect of the present invention, a method of in-phase orthogonal IQ data transmission based on a general public radio interface CPRI protocol is provided. The in-phase orthogonal IQ data transmission method based on the general public radio interface CPRI protocol according to the present invention 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. In order to achieve the above object, in another aspect of the present invention, an in-phase orthogonal IQ data transmission system based on a general public radio interface CPRI protocol is also provided. The in-phase orthogonal IQ data transmission system based on the common public radio interface CPRI protocol according to the present invention 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. Through the present invention, 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. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are set to illustrate,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, In the drawings: 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; Method schematic

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. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict. The invention will be described in detail below with reference to the drawings in conjunction with the embodiments. In the following embodiments, the steps shown in the flowchart of the accompanying drawings may be performed in a computer system such as a set of computer executable instructions, and although the logical order is shown in the flowchart, in some In this case, the steps shown or described may be performed in a different order than the ones described herein. Embodiment 1 In this embodiment, an IQ data transmission method based on a CPRI protocol is provided. The method includes: determining an IQ mapping mode used by each system for one or more standards, and determining each standard format. The information of the antenna carrier container AxC Container in the corresponding IQ mapping mode and the parameter of the corresponding IQ mapping mode of the standard; the IQ data block of the IQ data block of the basic frame is divided, and the divided IQ Data Block includes: The part of the AxC Container of all standards, the part for providing 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 corresponding to the standard 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. 4, 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. In the case, 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. In this step, the IQ data block of the basic frame can be divided into three parts according to the actual application situation: the first part is AxC Container #i ( 0 <= i <= N, N is the IQ channel contained therein. 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). For the downlink basic frame, 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.

Mapping Method 1 This method is a multi-standard IQ mapping method based on IQ sample data. It can be applied to any wireless system based on IQ sample rate. The purpose is to make the IQ data into the CPRI frame as compact as possible. Obtain a higher bandwidth utilization, as described below: Based on Mapping Method 1, the size of the AxC Container contained in the IQ data is N _A xc=2*ceil ( M*fs/fc ), where the function ceil returns "greater than or equal to the expression" The smallest integer,,, M represents the width of the uplink or downlink I or Q of its wireless system, fs is the IQ sample rate, and fc is the CPRI basic frame rate. Based on Mapping Method 1, a K in an AxC Container a substantially continuous frames are called AxC Container Block, which contains the S preclude the IQ data samples, and N _ST padding bits, wherein S, K satisfies an expression S / fs = K / fc, S , and K is calculated by the expression Find K=LCM ( fs*fc ) /fs, S=LCM ( fs*fc ) /fc, the function LCM returns "the least common multiple of the expression,,, where the number of padding bits N _ST =K*NAxC-2* M * S, where, N _ST padding bits depending on the application, can be used User defined data input channel, NST padding bits may choose AxC The front or back position of the Container Block is transmitted.

Mapping Method 2 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: Based on Mapping Method 2, the size of the AxC Container contained in the IQ data is N _AxC > 2*ceil ( M*S/K ), where K=T _F *fc, S=N _SYM *N _SAM =floor ( T _F /T _S ) *N _SAM where N _SYM is the number of symbols in the frame period, N _SAM is the number of IQ samples in the symbol period, T _F is the frame period, and T _s is the symbol Cycle, the function floor returns "the largest integer less than or equal to the expression,. Based on Mapping Method 2, an AxC Container Block contains N _SYM AxC

Symbol Block and NS FRM padding bits, one AxC Symbol Block contains N _SAM IQ sample data and NS_SYM padding bits, where N _S — _SYM =floor ( ( K*N _AxC -2*M*S ) /N _SY M ), Ns K*N _AxC -2*M*SN _s SYM * N _SYM , where N _s FRM, NsYM*Ns SYM padding bits ^ ^ can be used to transmit user-defined data channels according to the specific application , N _s — _FRM padding bits can be selected for transmission in the front or back position of the AxC Container Block. Ns SYM can choose to transmit in the front or back position in the AxC Symbol Block.

Mapping Method 3 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. Based on Mapping Method 3, the size of an AxC Container is N _AxC = 2 * M, and the value of M is 8 to 20 for the next behavior and 4 to 20 for the upper behavior. Based on Mapping Method 3, 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. IQ sample data, where N _c is the smallest integer satisfying N _c > ceil ( N _A *S/K ), N _V =N _C *KN _A *S , K=LCM ( fs*fc ) /fs, S =LCM ( fs*fc ) /fc.

Nm positions of ki=floors in K*N _C AxC Containers filled with IQ data (ki from k0=0 to k=N _c *Kl ) by the expression ki=floor ( i*N _c *K/N _v ) determine, where N _V *2*M The padding bits can be used to transmit user-defined data channels depending on the application. Preferably, in the step S404, 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. 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. For the uplink, at the CPRI transmission port of each RE, 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. At the CPRI sender, the REC or RE will compare the IQ data of different wireless systems of different REs.

The periodic boundary of the AxC Container Block begins to map to the respective AxC Container; at the CPRI receiving end, the REC or RE recovers from the corresponding AxC Container according to the periodic boundary of the recovered AxC Container Block and the relevant parameters required for multi-standard IQ wireless service data transmission. IQ data for 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. In this embodiment, the IQ data related parameters of CDMA and LTE (5Mhz bandwidth) are as shown in Table 1. In the uplink 1.2288Mhz rate at the CPRI interface of CDMA, one IQ data contains 2 times the IQ data and 2 Receive diversity antenna data, its IQ data sample width M' Is 4. Table 1

 Firstly, the downlink and uplink IQ mappings of CDMA and LTE (5Mhz bandwidth) are determined by using Mapping Method 1. The relevant parameters are shown in Table 2. Table 2

模式组 8 2 224 ( 0， 8 ) ( 16， 8 ) 合 1 Step IB, FIG. 6 is a schematic diagram of the division of the IQ data block according to the embodiment of the present invention. As shown in FIG. 6, in the actual application, the IQ data block of the basic frame is divided into three parts, and the first part is AxC. Container #i ( 0<=i<=N, N is the number of IQ channels carried), the number of bits occupied by one _AxC is N _AxCi ; 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). For the downlink basic frame, 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. The relevant parameters are determined as shown in Table 3. table 3

Mode group 8 2 224 ( 0, 8 ) ( 16, 8 )

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. 7 is a system block diagram of a two-stage RE cascading application according to an embodiment of the present invention, and 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. It should be noted that, in the above steps, the REC can transmit the relevant parameters required for the transmission of the multi-standard IQ wireless service data to the control management channel. Each RE. 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 and 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. In this embodiment, 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. In this embodiment, the IQ data parameters of WiMAX are as shown in Table 5. Table 4

表 5

table 5

 CDMA uses Mapping Method 3, and its IQ mapping related parameters are as shown in Table 6. That is, NA=3 CDMA IQ data multiplexing is transmitted in NC=1 AxC Container, and the number of empty frames is NV=1. FIG. 10 is a schematic diagram of an AxC Container Block of Mapping Method 3 according to an embodiment of the present invention.

WiMAX uses Mapping Method 2, and its IQ mapping related parameters are specifically shown in Table 7. 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

 Table 7

WiMAX IQ mapping parameter ( Mapping Method 2 ) parameter value

Step 2B, according to the actual application, the IQ data block of the basic frame is divided into three parts, the first part is AxC Container #i (0<=i<=N, N is the number of IQ channels carried), some The number of bits occupied by _AxC is N _AxCi ; the second part provides the basic frame level timing reference for the "AxC Container Block" of each level RE, hereinafter referred to as "CI" (AxC Container Block Chip Indication), which is only valid for the uplink basic frame. The occupied bit number is NCI (the NCI is equal to the number of cascading RE nodes). For the downlink basic frame, this part does not occupy any bits; the third part is reserved bits, which are padded by "0" by default, and are available according to the specific application. User-defined data channel. 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. . It should be noted that, in the foregoing steps, 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. In the system, for the uplink, at the CPRI transmission port of each RE, 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. For timing reference; 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. For the downlink, at 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. In the system, at the CPRI transmitting end, 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. In summary, with the above embodiments of the present invention, the following effects can be achieved: First, through the extended application of the CPRI4.0 standard protocol, the universal interface is suitable for multi-standard wireless service IQ data, which enhances the compatibility and flexibility of the interface. Second, 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. Thirdly, 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. Obviously, those skilled in the art should understand that the above 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. Thus, 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.

Claims

Claim A method for in-phase orthogonal IQ data transmission based on a common public radio interface CPRI protocol, comprising: determining an IQ mapping method used by each of one or more standards, and determining each The information of the antenna carrier container AxC Container in the IQ mapping mode corresponding to the standard and the parameter of the IQ mapping mode corresponding to the standard;  The IQ Data Block of the basic frame 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 for the antenna carrier container block AxC Container Block of each level of the wireless device. Block timing reference to the part of the CI;  The wireless device controller REC or the wireless device RE transmits and/or restores the wireless service IQ data of the standard on the CPRI interface according to the determined IQ mapping mode corresponding to the standard. 2. The method of claim 1, wherein the transmitting or/or restoring the IQ data on the CPRI interface by the REC or the RE comprises:  For the uplink, at the CPRI sending port of each RE, the periodic boundary of the AxC Container Block of each level RE is referenced by the 10 millisecond frame header recovered by the CPRI receiving end of the local slave port; the primary port of each level of RE Or the CI of the above-mentioned RE of the CPRI receiving port of the REC is a timing reference. 3. The method of claim 1, wherein the transmitting or/or restoring the IQ data on the CPRI interface by the REC or the RE comprises:  For the downlink, at the CPRI transmitting end of the REC, the periodic boundary of the AxC Container Block of all AxC Containers is referenced by the 10 millisecond frame header of the CPRI transmitting end; each RE is recovered by the CPRI receiving port of the slave port. The millisecond frame header is a timing reference that restores the period boundary of the AxC Container Block. 4. Method according to claim 2 or 3, characterized in that Transmitting the IQ data includes: the REC or the RE mapping the IQ data of the one or more standards from a period boundary of the AxC Container Block to an AxC Container corresponding to the standard; Restoring the IQ data includes: the REC or the RE recovering the IQ data of the one or more standards from the AxC Container according to a periodic boundary of the restored AxC Container Block and parameters required for IQ data transmission, The parameters required for the IQ data transmission include: information about the IQ Data Block partitioning situation, and parameters of an IQ mapping manner corresponding to the standard. The method of claim 4, wherein before the REC or the RE sends and/or restores the IQ data on the CPRI interface, the method further includes: the REC passing The control management channel transmits parameters required for the IQ data transmission to the RE. The method according to any one of claims 1 to 3, characterized in that the IQ Data Block of the basic frame is divided, and the divided IQ Data Block further comprises a reserved bit portion. 7. An in-phase orthogonal IQ data transmission system based on a common public radio interface CPRI protocol, comprising a wireless device controller REC, a wireless device RE, characterized in that  The REC includes: a determining module, configured to determine an IQ mapping manner used by each of the one or more standards, and determine information about an antenna carrier container AxC Container in an IQ mapping manner corresponding to each standard. The parameter of the IQ mapping method corresponding to the standard; the dividing module is configured to divide the IQ Data Block of the basic frame, and the divided IQ Data Block includes: a part for loading the AxC Container of the ownership system, for The antenna carrier container block AxC Container Block of each level of the wireless device provides a part of the AxC Container Block timing reference CI;  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. 8. The system of claim 7 wherein:  For the uplink, at the CPRI transmission port of each RE, the periodic boundary of the AxC Container Block of each level RE is referenced by a 10 millisecond frame header recovered by the CPRI receiving end of the local slave port; The CI of the primary port or the CPRI receiving port of the REC is a timing reference. 9. The system of claim 7 wherein: For the downlink, at the CPRI transmitting end of the REC, the periodic boundary of the AxC Container Block of all AxC Containers is the 10 millisecond frame header of the CPRI transmitting end. Timing Reference; Each RE restores the period boundary of the AxC Container Block by using a 10 millisecond frame header recovered from the CPRI receiving port of the port as a timing reference. A system according to claim 8 or claim 9, characterized in that  At the CPRI transmitting end, the REC or the RE is further configured to map the one or more types of IQ data from a period boundary of the AxC Container Block to an AxC Container corresponding to the standard;  At the CPRI receiving end, the REC or the RE is further used to recover the IQ data of the one or more standards from the AxC Container according to the periodic boundary of the restored AxC Container Block and the parameters required for IQ data transmission. The parameters required for the IQ data transmission include: information about the IQ Data Block partitioning situation, and parameters of the IQ mapping manner corresponding to the standard.