CN102118191B - A general public radio interface data transfer method, device and system - Google Patents

Abstract

The embodiment of the invention provides a method, equipment and a system for transmitting common public radio interface data. The method comprises the following steps of: receiving the common public radio interface data; performing a synchronization processing on the common public radio interface data to generate a hyper-frame frame head index signal of a common public radio interface; generating the frame format information of a basic frame of the common public radio interface according to the hyper-frame frame head index signal of the common public radio interface and a predetermined adaptive modulation parameter; generating a compressed frame of the common public radio interface according to the hyper-frame frame head index signal of the common pubic radio interface, the adaptive modulation parameters and the frame format information of the basic frame of the common pubic radio interface; and generating microwave data according to the compressed frame of the common pubic radio interface and the frame format information of the basic frame and transmitting the microwave data. In the method, the equipment and the system, the common public radio interface data can be transmitted by using microwave equipment, so that a distributed base station system can use the microwave equipment and the flexibility of equipment deployment is improved.

Description

A general public radio interface data transfer method, device and system

technical field

The invention relates to the field of mobile communication, in particular to a method, device and system for transferring data of a general public radio interface.

Background technique

The mobile communication system consists of a core network (Core Network, CN), a radio access network (Universal Terrestrial Radio Access Network, UTRAN) and user equipment (User Equipment, UE). The radio access network consists of a base station (Base Transceiver Station, BTS) and a base station controller (Base Transceriver Control, BSC) or radio network controller (Radio Network Control, RNC) for controlling multiple base stations. Traditional wireless base stations The baseband unit and the radio frequency unit are integrated together and cannot be completely separated. When the baseband unit is added, the radio frequency unit must also be added, which leads to waste of radio frequency unit resources and is not conducive to network construction.

Distributed base station technology is a more effective solution to this problem. The distributed base station system divides the wireless base station into a base band processing unit (Base Band Unit, BBU) and a remote radio unit (Remote Radio Unit, RRU) Two parts, connected by optical fiber or cable. In terms of equipment deployment, the core network, wireless network controller and baseband processing unit are concentrated in one place, and remote radio equipment is deployed on the planned site to achieve wireless coverage. Because the RRU has the characteristics of small size, light weight, simple and convenient installation, etc., it can be directly installed on the metal mast or wall near the antenna, so the distributed base station system has the characteristics of low cost, flexible deployment, and convenient expansion.

Common Public Radio Interface (CPRI) is a standard interface between BBU and RRU. In the CPRI specification, the CPRI protocol stack is divided into three planes: User Plane (User Plane), Control and Management Plane (C&M Plane) and synchronization plane (SYNC). Among them, the user plane is used to transmit user data, and the control and management plane is used to transmit L1-layer in-band protocols with high real-time requirements, high-speed data link control (HDLC)-based and Ethernet-based (Ethernet)-based layer 2 protocols, and user Custom fields, sync planes for synchronization and timing. The data of these three planes is transmitted on cables or optical fibers in the form of Time Division Multiplex (TDM).

Microwave (MW) transmission has obvious engineering advantages in cities, remote areas or special areas (such as rivers, etc.) because it does not need to lay optical fibers or cables, and directly transmits data through space, so it is applied to traditional mobile communication systems Among them, it is used to transmit client signals between the BBU and the RNC, such as TDM E1 service data and Ethernet (Ethernet, ETH) service data.

In the process of realizing the present invention, the inventors found that there are at least the following problems in the prior art: the traditional wireless base station integrates the RRU and the BBU on one device, but the distributed base station system sets the RRU and the BBU separately, resulting in a gap between the RRU and the BBU. There is a problem of unreachable optical fiber, and existing microwave equipment only supports client signals such as E1 and ETH, and does not support a new client signal such as CPRI.

Contents of the invention

In order to overcome the defects in the prior art, the embodiments of the present invention provide a method, device and system for transmitting CPRI data, so as to support microwave transmission of CPRI data.

According to an embodiment of the present invention, a method for sending UPRI data, the method includes: receiving UPRI data; synchronizing the UPRI data to generate a UPRI superframe header indication signal; The general public radio interface superframe frame header indication signal and the preset adaptive modulation parameters generate the general public radio interface basic frame frame format information; according to the general public radio interface superframe frame header indication signal, the adaptive modulation parameters and The basic UPI frame format information generates UPI compressed frames; generates and transmits microwave data according to the UPI compressed frames and the UPI basic frame format information.

An embodiment of the present invention also provides a general public radio interface data receiving method, the method comprising: receiving microwave data; synchronizing the microwave data to extract the microwave payload and microwave overhead; parsing the microwave overhead to extract the general public radio interface Basic frame frame format information; deadapting the microwave payload to extract the general public radio interface compressed frame; generating a general public radio interface superframe header indication signal according to the general public radio interface compressed frame; according to the general public radio interface The interface superframe header indication signal and the general public radio interface basic frame frame format information generate and send the general public radio interface data.

Another UPRI data transmission device according to an embodiment of the present invention, the device includes: an uplink receiving unit for receiving UPRI data; an uplink synchronization unit for synchronizing the parallel UPRI data To generate the general public radio interface superframe frame header indication signal; the frame format information acquisition unit is used to generate the general public radio interface basic frame frame according to the general public radio interface superframe frame header indication signal and preset adaptive modulation parameters Format information; a compression unit, used to generate a general public radio interface compressed frame according to the general public radio interface superframe header indication signal, adaptive modulation parameters and general public radio interface basic frame frame format information; a microwave data generation unit, using The microwave data is generated according to the UPI compressed frame and the UPI basic frame format information; the uplink sending unit is configured to send the microwave data.

Another general public radio interface data receiving device in the embodiment of the present invention, the device includes: a downlink receiving unit for receiving microwave data; a microwave demultiplexing unit for synchronizing microwave data to extract microwave payload and microwave overhead ; The microwave overhead parsing unit is used to parse the microwave overhead to extract the general public radio interface basic frame frame format information; the microwave payload de-adaptation unit is used to de-adapt the general public radio interface compression from the microwave payload frame; a downlink synchronization unit, configured to synchronize the UPI compressed frame to generate a UPI superframe header indication signal; a decompression unit, configured to indicate according to the UPI superframe header The signal and the basic frame format information of the common public radio interface are decompressed to obtain the common public radio interface data; the downlink sending unit is configured to send the common public radio interface data.

An embodiment of the present invention is also a general public wireless interface data transfer system, the system includes: a first microwave device and a second microwave device; the first microwave device is connected to a remote radio unit, and is used to receive the remote radio unit. The UPI data, converting the UPI data into microwave data and sending it to the second microwave device; and receiving the microwave data sent by the second microwave device, converting the microwave data into UPI data and sent to the radio remote unit; the second microwave device is connected to the baseband processing unit for receiving the microwave data sent by the first microwave device, converting the microwave data into general public radio interface data and sending it to the baseband processing unit and, receiving the UPI data sent by the baseband processing unit, converting the UPI data into microwave data and sending it to the first microwave device.

The above technical solution has the following advantages or beneficial effects: by providing a CPRI data transmission method, equipment and system, microwave equipment can be used to transmit CPRI data, so that microwave equipment can be used in distributed base station systems, and the flexibility of equipment deployment is improved .

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained according to these drawings without any creative effort.

Fig. 1 provides the flowchart of a kind of CPRI data sending method for the embodiment of the present invention;

Fig. 2 provides the flowchart of a kind of CPRI data transmission method for the embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a compressed CPRI base frame provided by an embodiment of the present invention;

Fig. 4 provides the flowchart of a kind of CPRI data sending method for the embodiment of the present invention;

FIG. 5 is a flowchart of a method for receiving CPRI data provided by an embodiment of the present invention;

6 is a flow chart of a method for receiving CPRI data provided by an embodiment of the present invention;

FIG. 7 is a structural diagram of a CPRI data sending device provided by an embodiment of the present invention;

Fig. 8 provides a structural diagram of a compression unit in a CPRI data sending device according to a preferred embodiment of the present invention;

Fig. 9 provides a structural diagram of a microwave data generating unit in a CPRI data sending device according to a preferred embodiment of the present invention;

FIG. 10 is a structural diagram of a CPRI data sending device provided by an embodiment of the present invention;

FIG. 11 is a structural diagram of a CPRI data receiving device provided by an embodiment of the present invention;

FIG. 12 is a structural diagram of a CPRI data receiving device provided by an embodiment of the present invention;

FIG. 13 is a structural diagram of a CPRI data transfer system provided by an embodiment of the present invention;

FIG. 14 is a structural diagram of a microwave device for transmitting CPRI data according to an embodiment of the present invention;

FIG. 15 is a structural diagram of a CPRI frame compression unit in a microwave device for transmitting CPRI data according to a preferred embodiment of the present invention;

FIG. 16 is a structural diagram of a CPRI compression frame synchronization unit provided in a microwave device for transmitting CPRI data according to a preferred embodiment of the present invention;

17 is a schematic diagram of a clock scheme in the uplink direction of microwave equipment connected to the baseband processing unit BBU provided by a preferred embodiment of the present invention;

Fig. 18a and Fig. 18b are schematic diagrams of the clock scheme in the downlink direction of the microwave equipment connected to the baseband processing unit BBU provided by a preferred embodiment of the present invention;

Fig. 19 is a schematic diagram of a clock scheme in the downlink direction of a microwave device connected to a remote radio unit RRU provided by a preferred embodiment of the present invention;

Fig. 20a and Fig. 20b are schematic diagrams of a clock scheme in the uplink direction of a microwave device connected to a remote radio unit RRU provided by a preferred embodiment of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Embodiment one

An embodiment of the present invention provides a general public wireless interface data transmission method, as shown in Figure 1, the method includes:

Step 101, receiving GPRI data;

Step 102, synchronizing the UPRI data to generate a UPRI superframe header indication signal;

In this embodiment, the synchronous processing of the data of the Common Public Radio Interface (CPRI) is specifically: searching for the synchronization byte K28.5 of the control word Z.0.0 in the CPRI superframe, and the superframe number of the control word Z.64.0 HFN, thereby obtaining CPRI superframe synchronization. Then the CPRI frame synchronization can be further realized on the basis of the CPRI superframe synchronization, and the CPRI superframe header indication signal can be obtained;

Step 103, generating general public radio interface basic frame frame format information according to the general public radio interface superframe header indication signal and preset adaptive modulation parameters;

Step 104, generating a general public radio interface compressed frame according to the general public radio interface superframe header indication signal, adaptive modulation parameters and general public radio interface basic frame frame format information;

Step 105: Generate and send microwave data according to the frame format information of the UPRI compressed frame and UPRI basic frame.

The method for transmitting GPRI data provided by the embodiment of the present invention can use microwave equipment to transmit GPRI data, so that microwave equipment can be used in a distributed base station system, and the flexibility of equipment deployment is improved.

Embodiment two

An embodiment of the present invention provides a general public wireless interface data transmission method, as shown in Figure 2, the method includes:

Step 201, receiving Common Public Radio Interface (CPRI) data;

Step 202, synchronizing the CPRI data to generate a CPRI superframe header indication signal;

In this embodiment, the synchronization processing of parallel CPRI data is specifically: searching for the synchronization byte K28.5 of the control word Z.0.0 in the CPRI superframe, and the superframe number HFN of the control word Z.64.0, thereby obtaining the CPRI Superframe synchronization. Then the CPRI frame synchronization can be further realized on the basis of the CPRI superframe synchronization, and the CPRI superframe header indication signal can be obtained;

Step 203, generating CPRI basic frame frame format information according to the CPRI superframe header indication signal and preset adaptive modulation parameters;

The CPRI basic frame frame format information includes: the position of the effective AxC in the CPRI basic frame, the number of bits of the effective AxC, the number of bytes of the CPRI compressed frame, and the position of the effective AxC in the CPRI compressed frame;

Because microwave transmission is affected by external factors such as weather, when the weather and other external factors change, the link performance of the microwave air interface will also change. In order to ensure a certain bit error rate or the availability of the microwave system, the microwave system will automatically adjust The modulation and demodulation algorithm of the sending end and the receiving end, that is, adaptive modulation AM (Adaptive Modulate). The main function of adaptive modulation is to detect the link performance indicators of the air interface at the receiving end, and negotiate and switch the modulation and demodulation algorithms at the sending end and receiving end according to the detection results. When the microwave modulation and demodulation algorithm changes, that is, after the microwave performs adaptive modulation operations, the transmission rate of the microwave air interface will change, and the service data rate that the microwave equipment can transmit will also change accordingly. When the modulation and demodulation algorithm is changed, generally, microwave multiplexing/demultiplexing may also be changed to adapt to the changed modulation and demodulation algorithm.

Wherein, the present embodiment provides the following two methods for generating CPRI basic frame frame format information:

1. Extract the control word of the CPRI basic frame according to the CPRI superframe header indication signal; analyze the high-speed data link control (HDLC, High DataLink Control) or Ethernet channel supported by the control word of the CPRI basic frame Obtain the position of the effective AxC included in the CPRI basic frame in the CPRI basic frame and the number of bits of the effective AxC;

Calculate the number of bytes of the CPRI compressed frame and the position of the effective AxC in the CPRI compressed frame according to the adaptive modulation parameter and the number of bits of the effective AxC;

According to the CPRI specification, CPRI supports HDLC-based slow C&M (control and management) channel and Ethernet-based fast C&M channel. CPRI basic frame format information including the position of each AxC container in the CPRI basic frame is carried by The CPRI specification itself does not standardize the control and management signaling on these two types of C&M channels. The control and management signaling is exchanged between the RRU and the BBU. Therefore, in order to extract this information for CPRI frame compression, the microwave equipment needs to perform frame synchronization on the CPRI link. , and then monitor the control and management signaling on the C&M channel, thereby extracting the frame format information of the CPRI basic frame.

2. Monitor the data area of the CPRI basic frame according to the CPRI superframe header indication signal to obtain valid bit position information;

Calculate the position of the effective AxC contained in the CPRI basic frame and the number of bits of the effective AxC in the CPRI basic frame according to the effective bit position information;

Calculate the number of bytes of the CPRI compressed frame and the position of the effective AxC in the CPRI compressed frame according to the adaptive modulation parameter and the number of bits of the effective AxC.

This solution does not need to monitor the above-mentioned non-standardized control and management signaling carried on the HDLC or Ethernet, but directly obtains the frame format information of the CPRI basic frame by analyzing the data flow of the CPRI link. Because in the CPRI basic frame frame structure, the position of the control word is fixed, and if the IQ data block contains reserved bits, the stuffing bits on these reserved bits are fixed, on the contrary, the bits occupied by the AxC container are Variable per frame. Therefore, this property can be used to directly obtain the frame format information of the CPRI basic frame by analyzing the CPRI link data flow.

Step 204, generating a CPRI compressed frame according to the CPRI superframe header indication signal, adaptive modulation parameters and CPRI basic frame frame format information;

The step of generating the compressed frame provided by the present embodiment is specifically: extracting the control word and the effective AxC data of the CPRI basic frame according to the CPRI superframe header indication signal, the position of the effective AxC in the CPRI basic frame and the number of bits of the effective AxC;

Select valid AxC data to be transmitted according to the adaptive modulation parameters;

A CPRI compressed frame is generated in a time-division multiplexed manner for the control word of the CPRI basic frame and the valid AxC data to be transmitted.

According to the CPRI specification, I/Q data is mapped to a basic frame in units of antenna carrier frequency containers (AxC Container), and an AxC container contains I/Q samples in one UMTS chip of one carrier frequency of one antenna data, and a basic frame can contain multiple AxC containers, so one CPRI link can simultaneously carry IQ sampling data of multiple carrier frequencies of multiple antennas. AxC containers can be mapped to a basic frame in two ways: packed position (Packed Position) and flexible position (Flexible Position). The compact position means that each AxC container is continuously mapped to a basic frame in sequence, and the remaining bits are Reserved bits, and the flexible placement means that each AxC container is mapped to a basic frame according to the position specified by the application, and other bits in the frame that are not occupied by the AxC container are reserved bits.

As shown in Figure 3, in order to remove the structure of the compressed CPRI basic frame after the reserved bits, the control word is at the front, and each AxC container is sequentially arranged in sequence. Since the AxC container is not necessarily byte-aligned, the last Bytes may contain padding bits. In this way, the compressed CPRI basic frame takes bytes as a unit and only includes useful information such as control words and valid AxC containers in the original CPRI basic frame. Since the compressed CPRI link is still a synchronous link in units of compressed basic frames with a fixed length, frame synchronization of the compressed CPRI link can still be obtained according to the frame synchronization method of the original CPRI link. In order to restore the position of each AxC container in the CPRI basic frame at the opposite end, relevant information including the position information of each AxC container in the CPRI basic frame can be transmitted through the corresponding overhead on the microwave channel carrying the CPRI link. CPRI frame format information. The receiving end obtains the position information of each AxC container in the CPRI basic frame by extracting the overhead, so as to restore the received compressed CPRI basic frame to a standard CPRI basic frame.

Step 205, convert the serial CPRI data into parallel CPRI data, and perform 10Bit to 8Bit decoding.

At present, CPRI defines four line rates, namely 614.4Mbit/s, 1228.8Mbit/s, 2457.6Mbit/s and 3072.0Mbit/s. The frame structure of each rate CPRI line is the same, but the word length of the corresponding basic frame is different ( Word lengths are 8, 16, 32, 40 bits or 1, 2, 4, 5 bytes respectively). The physical line of CPRI adopts 8B/10B line encoding. For example, the line rate of CPRI data link with rate of 491.52Mbit/s is 614.4Mbit/s after 8B/10B line encoding.

Wherein, CPRI is a kind of synchronous transmission link based on a certain frame structure, and the length of its basic frame is the width of a WCDMA chip (chip), that is, 1/3.84MHz=260.416667ns, and a basic frame is numbered by W=0, ...15 consists of 16 words (word) (the word numbered W=0 is a control word, used to transmit information such as control and management plane data and synchronization plane data, and the rest are used to transmit I/Q data). On the basis of the basic frame, every 256 basic frames further constitute a superframe, and 150 superframes correspond to a Universal Mobile Telecommunications System (UMTS) physical frame with a length of 10ms. For ease of expression, Z (Z=0...149) is used in the CPRI specification to represent the superframe number of a certain superframe corresponding to a 10ms UMTS physical frame, and X (x=0...255) is used to represent the superframe number in a superframe For the frame number of a corresponding basic frame, use W (W=0..15) to represent the number of a certain word (word) in a basic frame, and use Y (Y=0..3) to represent a The serial number of the corresponding byte (byte) constituting a certain word in the basic frame is represented by B (B=0..31) representing the serial number of the corresponding bit (bit) constituting a certain word in a basic frame. According to the CPRI specification, CPRI obtains superframe synchronization through the synchronization byte K28.5 of the control word Z.0.0 and the hyperframe number HFN (Hyperframe Number) of the control word Z.64.0 in each superframe, thereby realizing CPRI frame synchronization of.

Step 206: Generate and transmit microwave data according to the frame format information of the CPRI compressed frame and CPRI basic frame.

The step of generating microwave data provided in this embodiment is specifically: adapting the CPRI compressed frame to the payload area of the microwave frame;

Adapting frame format information of the CPRI basic frame to an overhead area of a microwave frame;

The microwave payload and the microwave overhead are multiplexed in a time-division multiplexing manner to form microwave data.

Because the microwave transmission bandwidth is generally less than 1Gbit/s, and the minimum bandwidth of the CPRI data link is 614.4Mbit/s, directly using the microwave transparent transmission of the CPRI data link will cause bandwidth waste or fail to transmit, so the CPRI basic frame needs to be compressed , under normal circumstances, the antenna carrier AxC (Antenna Carrier) in the CPRI basic frame cannot always just occupy the position of the IQ data part in the entire CPRI basic frame. For example, the WCDMA uplink data link adopts 8bit sampling width and 2×3.84MHz sampling rate and dual-antenna diversity reception, the rate of one AxC is 122.88Mbit/s, if a CPRI link with a rate of 491.52Mbit/s (line speed is 614.4Mbit/s) is used to transmit two AxCs, and the control word is removed, then There is 215.04MHz free bandwidth. Therefore, the present invention compresses the CPRI basic frame, removes the reserved bits, and then maps it into the microwave frame structure. The above-mentioned embodiment provides a method for sending CPRI data. Sending CPRI data through microwaves can enable the BBU and RRU to transmit CPRI data through microwaves.

Step 205: Convert the serial CPRI data into parallel CPRI data, and perform 10Bit to 8Bit decoding.

At present, CPRI defines four line rates, namely 614.4Mbit/s, 1228.8Mbit/s, 2457.6Mbit/s and 3072.0Mbit/s. The frame structure of each rate CPRI line is the same, but the word length of the corresponding basic frame is different ( Word lengths are 8, 16, 32, 40 bits or 1, 2, 4, 5 bytes respectively). The physical line of CPRI adopts 8B/10B line encoding. For example, the line rate of CPRI data link with rate of 491.52Mbit/s is 614.4Mbit/s after 8B/10B line encoding.

Wherein, CPRI is a kind of synchronous transmission link based on a certain frame structure, and the length of its basic frame is the width of a WCDMA chip (chip), that is, 1/3.84MHz=260.416667ns, and a basic frame is numbered by W=0, ...15 consists of 16 words (word) (the word numbered W=0 is a control word, used to transmit information such as control and management plane data and synchronization plane data, and the rest are used to transmit I/Q data). On the basis of the basic frame, every 256 basic frames further constitute a superframe, and 150 superframes correspond to a Universal Mobile Telecommunications System (UMTS) physical frame with a length of 10ms. For ease of expression, Z (Z=0...149) is used in the CPRI specification to represent the superframe number of a certain superframe corresponding to a 10ms UMTS physical frame, and X (X=0...255) is used to represent the superframe number in a superframe For the frame number of a corresponding basic frame, use W (W=0..15) to represent the number of a certain word (word) in a basic frame, and use Y (Y=0..3) to represent a The serial number of the corresponding byte (byte) constituting a certain word in the basic frame is represented by B (B=0..31) representing the serial number of the corresponding bit (bit) constituting a certain word in a basic frame. According to the CPRI specification, CPRI obtains superframe synchronization through the synchronization byte K28.5 of the control word Z.0.0 and the hyperframe number HFN (Hyperframe Number) of the control word Z.64.0 in each superframe, thereby realizing CPRI frame synchronization of.

Embodiment Three

An embodiment of the present invention provides a general public wireless interface data transmission method, as shown in Figure 4, the method includes:

Step 401, receiving CPRI data sent by the baseband processing unit BBU;

Step 402, converting the CPRI data into microwave data and sending it to a microwave device connected to the receiving remote radio unit RRU.

Wherein, the specific process of converting the CPRI data into microwave data is the same as the above embodiment, and will not be repeated here.

The above embodiments provide a method for sending CPRI data, which can compress the CPRI data and convert it into microwave data for sending, so that the CPRI data can be transmitted between the BBU and the RRU through microwave.

Embodiment four

An embodiment of the present invention provides a general public wireless interface data receiving method, as shown in FIG. 5, the method includes:

Step 501, receiving microwave data;

Step 502, synchronizing the microwave data to extract microwave payload and microwave overhead;

Step 503, parsing the microwave overhead to extract frame format information of the common public radio interface basic frame;

Step 504, deadapting the microwave payload to extract the compressed GPRI frame;

Step 505, generating a UPI superframe header indication signal according to the UPI compressed frame;

In the present embodiment, obtain superframe synchronization for the synchronization byte K28.5 of the control word Z.0.0 in the corresponding superframe of the search CPRI compressed frame and the superframe number HFN of the control word Z.64.0 and then realize the CPRI compressed frame synchronization, Obtaining a CPRI superframe header indication signal;

Step 505: Generate and send UPI data according to the UPI superframe header indication signal and UPI basic frame format information.

In a preferred embodiment of the present invention, the general public radio interface basic frame frame format information includes:

The position of the antenna carrier in the basic frame of the common public radio interface, the number of bits of the effective antenna carrier, the number of bytes of the compressed frame of the common public radio interface, and the position of the effective antenna carrier in the compressed frame of the common public radio interface.

The above embodiments provide a method for receiving CPRI data, which can decompress microwave data to be converted into CPRI data for transmission, so that the BBU can acquire CPRI data transmitted through microwave.

Embodiment five

An embodiment of the present invention provides a general public wireless interface data receiving method, as shown in FIG. 6, the method includes:

Step 601, receiving microwave data sent by a microwave device connected to the baseband processing unit BBU;

Step 601, convert the microwave data into CPRI data and send it to the remote radio unit RRU.

Wherein, the specific process of converting the CPRI data into microwave data is the same as the above embodiment, and will not be repeated here.

The above embodiments provide a method for receiving CPRI data, which can decompress microwave data to be converted into CPRI data for transmission, so that the RRU can acquire and transmit CPRI data through microwave.

Embodiment six

An embodiment of the present invention provides a general public wireless interface data transmission device, as shown in Figure 7, the device includes:

an uplink receiving unit 701, configured to receive general public radio interface data;

An uplink conversion unit 702, configured to perform synchronous processing on the parallel UPI data to generate a UPI superframe header indication signal;

The frame format information acquisition unit 703 is used to generate the general public radio interface basic frame frame format information according to the general public radio interface superframe header indication signal and the preset adaptive modulation parameters; the CPRI basic frame frame format information includes: The position of the effective AxC in the CPRI basic frame, the number of bits of the effective AxC, the number of bytes of the CPRI compressed frame, and the position of the effective AxC in the CPRI compressed frame;

The compression unit 704 is configured to generate a general public radio interface compressed frame according to the general public radio interface superframe header indication signal, adaptive modulation parameters and general public radio interface basic frame frame format information;

A microwave data generation unit 705, configured to generate microwave data according to the UPI compressed frame and UPI basic frame format information;

An uplink sending unit 706, configured to send the microwave data.

In an embodiment of the present invention, the frame format information acquisition unit 703 further includes:

The first monitoring unit is used to extract the control word of the CPRI basic frame according to the CPRI superframe header indication signal, and analyze the HDLC channel or Ethernet channel supported by the control word of the CPRI basic frame to obtain the CPRI basic The position of the AxC contained in the frame in the CPRI basic frame and the number of bits of the effective AxC;

The first calculating unit is configured to calculate the byte number of the CPRI compressed frame and the position of the effective AxC in the CPRI compressed frame according to the adaptive modulation parameter and the bit number of the effective AxC.

In another embodiment of the present invention, the frame format information acquisition unit 703 further includes:

The second monitoring unit is used to monitor the data area of the CPRI basic frame according to the CPRI superframe header indication signal to obtain effective bit position information; calculate the AxC contained in the CPRI basic frame according to the effective bit position information in the CPRI basic frame The position in and the number of bits of valid AxC;

The second calculation unit calculates the number of bytes of the CPRI compressed frame and the position of the effective AxC in the CPRI compressed frame according to the adaptive modulation parameter and the number of bits of the effective AxC.

In an embodiment of the present invention, as shown in FIG. 8, the compression unit 704 further includes:

An extracting unit 801, configured to extract the control word and valid AxC data of the CPRI basic frame according to the CPRI superframe header indication signal, the position of the valid AxC in the CPRI basic frame and the number of bits of the valid AxC;

A selection unit 802, configured to select valid AxC data to be transmitted according to the adaptive modulation parameters;

The generating unit 803 is configured to generate a CPRI compressed frame in a time-division multiplexed manner for the control word of the CPRI basic frame and the valid AxC data to be transmitted.

In an embodiment of the present invention, as shown in FIG. 9, the microwave data generating unit 705 further includes:

Payload adaptation unit 901, configured to adapt the CPRI compressed frame to the payload area of the microwave frame structure;

An overhead forming unit 902, configured to generate microwave overhead according to the frame format information of the CPRI basic frame;

The microwave multiplexing unit 903 is configured to multiplex the microwave payload and microwave overhead in a time-division multiplexing manner to form microwave data.

The above embodiments provide a CPRI data sending device, which can compress the CPRI data and convert it into microwave data for sending, so that the CPRI data can be transmitted between the BBU and the RRU through microwave.

Embodiment seven

An embodiment of the present invention provides a general public wireless interface data transmission device, as shown in Figure 10, the device includes:

An uplink receiving unit 1001, configured to receive CPRI data sent by the baseband processing unit BBU;

an uplink conversion unit 1002, configured to convert the CPRI data into microwave data;

The uplink sending unit 1003 is configured to send the microwave data to a microwave device connected to a remote radio unit RRU.

Wherein, the uplink conversion unit includes the uplink synchronization unit, the frame format information acquisition unit, the compression unit, and the microwave data generation unit in the above-mentioned embodiments, and realizes the same functions, which will not be repeated here.

The above embodiments provide a CPRI data sending device, which can compress the CPRI data and convert it into microwave data for sending, so that the CPRI data can be transmitted between the BBU and the RRU through microwave.

Embodiment eight

An embodiment of the present invention provides a general public wireless interface data receiving device, as shown in Figure 11, the device includes:

a downlink receiving unit 1101, configured to receive microwave data;

A microwave demultiplexing unit 1102, configured to synchronize microwave data to extract microwave payload and microwave overhead;

A microwave overhead parsing unit 1103, configured to parse the microwave overhead to extract CPRI basic frame frame format information;

The CPRI basic frame frame format information includes: the position of the effective AxC in the CPRI basic frame, the number of bits of the effective AxC, the number of bytes of the CPRI compressed frame, and the position of the effective AxC in the CPRI compressed frame;

A microwave payload de-adaptation unit 1104, configured to de-adapt the CPRI compressed frame from the microwave payload;

A downlink synchronization unit 1105, configured to synchronize the CPRI compressed frame to generate a CPRI superframe header indication signal;

Decompression unit 1106, configured to decompress parallel CPRI data according to the CPRI superframe header indication signal and CPRI basic frame frame format information;

The downlink sending unit 1107 is configured to send the CPRI data.

The above embodiments provide a CPRI data receiving device, which can decompress microwave data to be converted into CPRI data for transmission, so that the BBU can acquire CPRI data transmitted through microwave.

Embodiment nine

An embodiment of the present invention provides a general public wireless interface data receiving device, as shown in Figure 12, the device includes:

A downlink receiving unit 1201, configured to receive microwave data sent by a microwave device connected to the baseband processing unit BBU;

a downlink conversion unit 1202, configured to convert the microwave data into CPRI data;

The downlink sending unit 1203 is configured to send the CPRI data to the remote radio unit RRU.

Wherein, the downlink conversion unit includes a microwave demultiplexing unit, a microwave overhead analysis unit, a microwave payload deadaptation unit, and a decompression unit in the above-mentioned embodiment, and the functions thereof are also the same, so details are not repeated here.

The above embodiments provide a CPRI data receiving device, which can decompress microwave data to be converted into CPRI data for transmission, so that the RRU can acquire CPRI data transmitted through microwave.

Embodiment ten

An embodiment of the present invention provides a general public radio interface data transfer system, as shown in FIG. 13 , the system includes: a first microwave device 1301 and a second microwave device 1302;

The first microwave device 1301 is connected to the remote radio unit RRU, and is used to receive the CPRI data sent by the remote radio unit RRU, convert the CPRI data into microwave data and send it to the second microwave device 1302; and, receive the second microwave The microwave data sent by the device 1302 is converted into CPRI data and sent to the RRU;

The second microwave device 1302 is connected to the baseband processing unit BBU, configured to receive the microwave data sent by the first microwave device 1301, convert the microwave data into CPRI data and send it to the BBU; and receive the CPRI data sent by the BBU, The CPRI data is converted into microwave data and sent to the first microwave device 1301 .

The above embodiments provide a CPRI data transfer system, which can use microwaves to transfer CPRI data, thereby applying microwave equipment to a distributed base station system, and solving the problem of unreachable optical fibers between the BBU and the RRU.

Embodiment Eleven

An embodiment of the present invention provides a microwave device for transmitting CPRI data. The microwave device is applied to a distributed base station system and can be connected to a BBU or RRU. As shown in FIG. 14 , the microwave device includes:

The 10B/8B decoding unit 1401 is used for converting serial CPRI data into parallel CPRI data and performing 10Bit to 8Bit decoding. The 10B/8B decoding unit 1401 can also be used to detect the line signal loss (Loss Of Signal, LOS) state, if the CPRI link is a cable, the 10B/8B decoding unit 1401 is also responsible for detecting the LOS state of the CPRI line, for example in a If at least 16 8B/10B violations are detected within the superframe period, a LOS alarm will be reported. If the CPRI link is an optical cable, the LOS alarm can be reported by detecting whether the received optical power exceeds the limit.

CPRI frame synchronization unit 1402: for synchronizing the parallel CPRI data to generate a CPRI superframe header indication signal;

In a preferred embodiment of the present invention, synchronizing the parallel CPRI data is specifically: searching for the synchronization byte K28.5 of the control word Z.0.0 in the CPRI superframe, and obtaining the superframe number HFN of the control word Z.64.0 Super frame synchronization, and then realize CPRI frame synchronization, obtain CPRI super frame header indication signal; output frame loss (Loss Of Frame, LOF) alarm before CPRI frame synchronization, output CPRI super frame header indication signal to C&M after CPRI frame synchronization Channel or data flow monitoring unit 1403 and CPRI compression unit 1404 .

The C&M channel or data flow monitoring unit 1403 is used to extract the control word of the CPRI basic frame according to the CPRI superframe header indication signal, and deliver it to the CPRI frame format information extraction unit 1404; or monitor each of the IQ data areas of the CPRI basic frame Bits, determine which bits belong to reserved bits, for example, monitor the number of transitions of each bit in consecutive N frames (N is much greater than 1), the number of transitions is 0 is reserved, and the number of transitions is not 0 is occupied by valid AxC bit, and send the valid bit position information to the CPRI frame format information extraction unit 1404.

The CPRI frame format information extraction unit 1404 is used to analyze the supported HDLC channel or Ethernet channel of the control word to obtain the position of the effective AxC contained in the CPRI basic frame and the number of bits of the effective AxC in the CPRI basic frame; according to the self The number of bytes of the CPRI compressed frame and the position of the effective AxC in the CPRI compressed frame are calculated by adapting the modulation parameters and the number of bits of the effective AxC.

Or, monitor the data area of the CPRI basic frame according to the CPRI superframe header indication signal to obtain effective bit position information; calculate the position and effective position and effective value of AxC contained in the CPRI basic frame according to the effective bit position information. The number of bits of AxC; calculating the number of bytes of the CPRI compressed frame and the position of the effective AxC in the CPRI compressed frame according to the adaptive modulation parameter and the number of bits of the effective AxC.

Pass the CPRI basic frame format information including the position of the effective AxC in the CPRI basic frame, the number of bits of the effective AxC, the number of bytes of the CPRI compressed frame, and the position of the effective AxC in the CPRI compressed frame to the overhead formation unit and the CPRI frame compression unit ;

CPRI frame compression unit 1405: used to generate a CPRI compressed frame according to the CPRI superframe header indication signal, adaptive modulation parameters and CPRI basic frame frame format information;

As shown in Figure 15, in a preferred embodiment of the present invention, the CPRI frame compression unit 1405 includes:

Control word and effective AxC extracting unit 1501, for extracting the control word and effective AxC data of CPRI basic frame according to the position of CPRI superframe frame header indication signal, AxC in CPRI basic frame and the bit number of effective AxC;

AxC selection unit 1502, used to select effective AxC data to be transmitted according to the adaptive modulation parameters, if the modulation mode is high and the microwave bandwidth is sufficient to transmit all effective AxC, the control word and effective AxC are sent to the lower module; if the modulation mode Low, the microwave bandwidth cannot transmit all effective AxC, then send the control word and the effective AxC that can be transmitted to the lower module according to the AxC priority.

The CPRI compressed frame forming unit 1503 generates a CPRI compressed frame by time-division multiplexing the CPRI control word and the effective AxC to be transmitted; and writes the CPRI compressed frame into FIFO1 with the upstream CPRI processing clock as the write clock.

FIFO1 (First In First Out Queue) unit 1504 buffers CPRI compressed frames.

Payload adaptation unit 1406: read out the CPRI compressed frame from FIFO1 with the microwave processing clock as the read clock, encapsulate the CPRI compressed frame into the adaptation layer frame structure of the microwave frame, and perform the adaptation from the CPRI rate to the microwave rate, Add corresponding adaptation layer frame header labels so that different payload units can be multiplexed in the microwave frame multiplexing unit. Rate adaptation is implemented by automatically inserting idle frames in the adaptation layer. If FIFO1 is empty, an idle frame of the adaptation layer is automatically inserted to adapt to the frequency difference between the processing clock of the CPRI and the microwave processing clock. In order to ensure that FIFO1 is not full, a payload area larger than the total number of bytes of the CPRI compressed frame in 125us can be allocated for CPRI.

Among them, the adaptation layer of the microwave frame can adopt the GEM (G-PON Encapsulation Method, GPON encapsulation form) adaptation layer or the GFP (Generic Framing Procedure, general framing procedure) adaptation layer or other encapsulation forms, the following is based on GEM The adaptation layer is used as an example to illustrate:

GEM is the service adaptation layer of GPON (Gigabit Passive Optical Network, Gigabit Passive Optical Network). Encapsulation of service data is an ideal scheme for integrated service access, and its frame structure is shown in Table 1.

PLI12bit PortID12bit PTI3bit HEC13bit Pavload

Table 1 GEM frame structure

Ethernet services and TDM services can be mapped to GEM frames. GEM has a data payload length indicator PLI, and the length of the PLI can be changed to ensure that the TDM service and Ethernet service can be adjusted and adapted to the GEM frame at a granularity of 1 byte. The GPON system is a point-to-multipoint network architecture, with a port indicating Port-ID, which can be multiplexed or switched according to the Port-ID. The payload type indication PTI indicates the payload type, and is mainly used to indicate whether the Ethernet data packet is fragmented.

CPRI is mapped to GEM using TDM. Each CPRI link occupies one or more GEMs, and the port indication PortIDs of the GEMs of the same CPRI link are the same, and the PortIDs of the GEMs of different CPRI links are not the same.

The overhead forming unit 1407 is configured to use the CPRI basic frame frame format information (the position of the antenna carrier AxC in the CPRI basic frame, the number of bits of the effective AxC, the number of bytes of the CPRI compressed frame, and the position of the effective AxC in the CPRI compressed frame CPRI basic frame format information) and other management information form microwave overhead according to a certain protocol.

Microwave frame multiplexing unit 1408: used to multiplex each payload part and overhead part in a time-division multiplexing manner to form a complete microwave frame structure and send it to the microwave modulation unit. Among them, one microwave device can transmit multiple CPRI links, multiple CPRI links can be time-division multiplexed in microwave frames, and can also be time-division multiplexed with other services (such as E1 and ETH) in microwave frames.

The microwave transmission modulation unit 1409 is used to modulate the data stream generated by the microwave frame multiplexing unit 1408 and convert it into an intermediate frequency signal. If the microwave adopts multi-channel technology, this module also completes the channel distribution function.

The IF/RF/ROF unit 1410 is used to perform intermediate frequency/radio frequency/fiber radio frequency transmission technology processing. In the uplink direction, the intermediate frequency signal modulated by the microwave transmission modulation unit 1409 is processed to obtain the IF/RF/ROF signal, which is transmitted through the microwave antenna 1411 . In the downlink direction, the signal received from the microwave antenna 1411 is processed by the ROF/RF/IF signal to obtain an intermediate frequency signal and sent to the microwave receiving modulation unit 1412 .

The microwave receiving and modulating unit 1412 receives the intermediate frequency signal from the IF/RF/ROF unit, and obtains the microwave data of the all-digital signal through demodulation.

The microwave frame demultiplexing unit 1413 performs frame synchronization on the microwave frame, demultiplexes the overhead part and the GEM payload part, and distributes the GEM frame to each CPRI link processing unit according to the PortID of the GEM; or according to the fixed time slot configuration, Distribute each GEM frame to each CPRI link processing unit.

The overhead processing unit 1414 analyzes the microwave overhead and extracts the CPRI basic frame format information (the position of AxC in the CPRI basic frame, the number of bits of valid AxC, the number of bytes of CPRI compressed frame, and the CPRI basic information of the position of valid AxC in the CPRI compressed frame. frame format information) and sent to the CPRI compression frame synchronization unit and the CPRI decompression unit.

The payload de-adaptation unit 1415 de-adapts the CPRI compressed frame from the frame structure of the payload adaptation layer. Specifically, de-adaptation is to search for valid frames in the adaptation layer, remove idle frames to extract CPRI compressed frames, and write the CPRI compressed frames into FIFO2 with the microwave processing clock as the write clock. When the correct adaptation layer frame header is not found in the payload area of the microwave frame, an adaptation layer frame loss alarm is reported.

For example, search the GEM frame header according to the Header Error Check (HEC, Header Error Check) algorithm, and then determine the payload length according to the GEM frame header information PLI. If the PLI is equal to 0, it means that the GEM frame is an idle frame, and the idle frame is removed; if the PLI is not equal to 0, the CPRI compressed frame is extracted; if the GEM frame header is not found in the entire microwave payload area, the GEM frame loss is reported Alarm (LCDG).

A CPRI compressed frame synchronization unit 1416, configured to synchronize the CPRI compressed frame to generate a CPRI superframe header indication signal;

As shown in Figure 16, in a preferred embodiment of the present invention, the CPRI compressed frame synchronization unit 1416 includes:

FIFO2 unit 1601, used for buffering CPRI compressed frames. FIFO2 full and empty is used for clock recovery unit and FIFO2 read control unit. The FIFO2 read control unit 1602 starts the FIFO2 read operation with the CPRI downlink processing clock as the read clock after the FIFO2 fullness reaches a preset specific value, and reports a LOS alarm if the CPRI compressed frame in FIFO2 is read empty. The frame header search unit 1603 searches for the synchronization byte K28.5 of the control word Z.0.0 in the superframe corresponding to the CPRI compressed frame and the superframe number HFN of the control word Z.64.0 to obtain superframe synchronization and then realize the synchronization of the CPRI compressed frame. CPRI superframe header indication signal. The number of bytes included in the CPRI compressed frame is different from the number of bytes included in the CPRI base frame, and the number of bytes included in the CPRI compressed frame is obtained by the sending end through overhead transfer to the receiving end. Output LOF alarm before CPRI compressed frame synchronization, and output CPRI superframe header indication signal after CPRI compressed frame synchronization.

The CPRI frame decompression unit 1417 is configured to restore the original CPRI frame signal according to the CPRI superframe header indication signal output by the CPRI compression frame synchronization unit 1416 and the basic CPRI frame format information output by the overhead processing unit 1414 .

The 8B/10B encoding unit 1418 is used for performing 8B/10B encoding and converting parallel data to serial data.

The above embodiments provide a microwave device for transmitting CPRI data, which can compress the CPRI data to be converted into microwave data for transmission, and can decompress the microwave data for conversion into CPRI data for transmission, so that RRU or BBR can receive through CPRI data transmitted by microwave.

Implementation Case Thirteen

Since the wireless base station system is a network-wide clock synchronization system, the clocks of each RRU must track the clock of the BBU. Therefore, when transmitting CPRI data through microwaves, the microwave equipment must also track the clock of the BBU.

Fig. 17 is a clock scheme in the uplink direction of the microwave equipment connected to the baseband processing unit BBU. This embodiment provides two schemes: one is to adopt the global common clock scheme, that is, the microwave equipment obtains a high-stability frequency reference from a synchronous clock distribution network such as the Global Positioning System (GPS) as the clock source of the CPRI link. Another solution is to recover the CPRI line clock from the serial data stream of the CPRI link. For example, the phase-locked loop technology is used for recovery, and the performance of the phase-locked loop is required to meet the CPRI specification.

Fig. 18a and Fig. 18b are clock schemes in the downlink direction of the microwave equipment connected to the baseband processing unit BBU. This embodiment provides two schemes: one is to use the clock output by the clock extraction module in the uplink direction as the working clock in the downlink direction. The other is to use an adaptive clock recovery technology, which uses a phase-locked loop (PLL) or a direct data frequency synthesizer (DDS) to recover the original CPRI link clock based on the loop control based on the fullness of the FIFO2.

The above embodiments provide a clock processing method of a microwave device connected to a BBU, so that the microwave device can track the clock of the BBU.

Implementation Case Fourteen

In a mobile communication system, the frequency stability of the radio frequency unit RRU of the base station is required to be high, and the accuracy of 0.05ppm is often required. Therefore, the RRU needs to obtain a frequency reference with high stability. Although CPRI itself is a highly stable synchronous link, since CPRI is transmitted via microwave in the present invention, and the GEM adaptation layer dynamically inserts stuffing bytes due to adaptive rate adaptation, CPRI needs to be transmitted after being transmitted via GEM/microwave channel. Restore the original high stability clock.

Figure 19 is a clock scheme in the downlink direction of the microwave equipment connected to the remote radio unit RRU. This embodiment provides two schemes: one is to adopt the global common clock scheme, that is, the microwave equipment obtains a high-stability frequency reference from a synchronous clock distribution network such as the Global Positioning System (GRS) as the clock source of the CPRI link, so that The microwave equipment on the RRU side can ensure the high stability requirements of the CPRI line clock. The other is to use an adaptive clock recovery technology, which uses a phase-locked loop (PLL) or a direct data frequency synthesizer (DDS) to recover the original CPRI link clock based on the loop control based on the fullness of the FIFO2.

Fig. 20a and Fig. 20b are clock schemes in the uplink direction of the microwave equipment connected to the remote radio unit RRU. This embodiment provides two solutions: one is to use the clock output by the clock recovery module in the downlink direction as the working clock in the uplink direction. Another solution is to recover the CPRI line clock from the serial data stream of the CPRI link. For example, the phase-locked loop technology is used for recovery, and the performance of the phase-locked loop is required to meet the CPRI specification.

The above embodiments provide a clock processing method of a microwave device connected to an RRU, so that the clock of the microwave device on the RRU side can track the clock of the microwave device on the BBU side, so that the RRU can track the clock of the BBU.

A CPRI data transmission method, device and system provided by the present invention have been introduced in detail above. For those of ordinary skill in the art, according to the ideas of the embodiments of the present invention, there will be changes in the specific implementation and application scope. In summary, the content of this specification should not be construed as limiting the present invention.

Claims (14)

1. A general public radio interface data transmission method, characterized in that the method comprises: Receive Common Public Radio Interface data; Synchronizing the UPRI data to generate a UPRI superframe header indication signal; Generate general public radio interface basic frame frame format information according to the general public radio interface superframe header indication signal and preset adaptive modulation parameters; Generate a general public radio interface compressed frame according to the general public radio interface superframe header indication signal, adaptive modulation parameters and general public radio interface basic frame frame format information; generating and sending microwave data according to the UPI compressed frame and UPI basic frame frame format information; Wherein, generating microwave data according to the general public radio interface compressed frame and general public radio interface basic frame frame format information includes: Adapting the UPI compressed frame to the payload area of the microwave frame, and adapting the UPI basic frame format information to the overhead area of the microwave frame; The microwave payload and the microwave overhead are multiplexed in a time-division multiplexing manner to form microwave data. 2. the general public radio interface data transmission method according to claim 1, is characterized in that, this general public radio interface basic frame frame format information comprises: The position of the antenna carrier in the basic frame of the common public radio interface, the number of bits of the effective antenna carrier, the number of bytes of the compressed frame of the common public radio interface, and the position of the effective antenna carrier in the compressed frame of the common public radio interface. 3. The UPI data transmission method according to claim 1, wherein said synchronizing said UPI data to generate a UPI superframe header indication signal comprises: converting serial universal public radio interface data to parallel universal public radio interface data; The parallel UPI data is synchronously processed to generate a UPI superframe header indication signal. 4. UPI data sending method according to claim 1, is characterized in that, wherein generates UPI basic frame according to said UPI superframe frame header indication signal and preset adaptive modulation parameters Frame format information includes: Extracting the control word of the general public radio interface basic frame according to the general public radio interface superframe header indication signal; Analyzing the high-speed data link control channel or Ethernet channel supported by the control word of the basic common public radio interface frame to obtain the position of the effective antenna carrier contained in the basic common public radio interface frame in the basic common public radio interface frame and the number of bits of the active antenna carrier; Calculate the number of bytes of the UPI compressed frame and the position of the effective antenna carrier in the UPI compressed frame according to the adaptive modulation parameter and the number of bits of the effective antenna carrier; or Monitoring the data area of the basic frame of the general public radio interface according to the general public radio interface superframe header indication signal to obtain valid bit position information; Calculate the position of the effective antenna carrier contained in the general public radio interface basic frame and the number of bits of the effective antenna carrier in the general public radio interface basic frame according to the effective bit position information; Calculate the number of bytes of the UPI compressed frame and the position of the effective antenna carrier in the UPI compressed frame according to the adaptive modulation parameter and the number of bits of the effective antenna carrier. 5. UPI data sending method according to claim 1, is characterized in that, wherein according to said UPI superframe header indication signal, adaptive modulation parameter and UPI basic frame frame format information Generating a CPRI compressed frame involves: Extracting the control word and effective antenna carrier data of the basic frame of the general public radio interface according to the general public radio interface superframe frame header indication signal, the position of the effective antenna carrier in the basic frame of the common public radio interface and the number of bits of the effective antenna carrier; selecting effective antenna carrier data to be transmitted according to the adaptive modulation parameters; The control word of the basic frame of the common public radio interface and the effective antenna carrier data to be transmitted are time-division multiplexed to form a compressed common public radio interface frame. 6. A general public radio interface data receiving method, characterized in that the method comprises: Receive microwave data; synchronizing the microwave data to extract microwave payload and microwave overhead; Parsing the microwave overhead to extract frame format information of the common public radio interface basic frame; deadapting the microwave payload to extract a Common Public Radio Interface compressed frame; Generating a UPI superframe header indication signal according to the UPI compressed frame; Generating and sending the UPI data according to the UPI superframe header indication signal and the UPI basic frame format information. 7. The method according to claim 6, wherein the general public radio interface basic frame frame format information includes: The position of the antenna carrier in the basic frame of the common public radio interface, the number of bits of the effective antenna carrier, the number of bytes of the compressed frame of the common public radio interface, and the position of the effective antenna carrier in the compressed frame of the common public radio interface. 8. A general public radio interface data transmission device, characterized in that the device comprises: an uplink receiving unit, configured to receive general public radio interface data; An uplink synchronization unit, configured to perform synchronous processing on the parallel UPI data to generate a UPI superframe header indication signal; A frame format information acquisition unit, configured to generate general public radio interface basic frame frame format information according to the general public radio interface superframe header indication signal and preset adaptive modulation parameters; A compression unit, configured to generate a general public radio interface compressed frame according to the general public radio interface superframe header indication signal, adaptive modulation parameters and general public radio interface basic frame frame format information; A microwave data generating unit, configured to generate microwave data according to the general public radio interface compressed frame and the general public radio interface basic frame frame format information; an uplink sending unit, configured to send the microwave data; Wherein, the microwave data generation unit includes: A payload adaptation unit, configured to adapt the compressed frame of the common public radio interface to the payload area of the microwave frame structure; an overhead forming unit, configured to generate microwave overhead according to the general public radio interface basic frame frame format information; The microwave multiplexing unit is configured to multiplex the microwave payload and microwave overhead in a time-division multiplexing manner to form microwave data. 9. The UPI data sending device according to claim 8, further comprising: The serial-to-parallel conversion unit is used for converting serial UPI data into parallel UPI data. 10. The UPI data sending device according to claim 8, wherein the frame format information acquisition unit comprises: The first monitoring unit is used to monitor the HDLC channel or Ethernet channel supported by the control word of the general public radio interface basic frame according to the general public radio interface superframe header indication signal to obtain the content of the general public radio interface basic frame The position of the effective antenna carrier in the common public radio interface basic frame and the number of bits of the effective antenna carrier; The first calculation unit is configured to calculate the number of bytes of the UPI compressed frame and the position of the effective antenna carrier in the UPI compressed frame according to the adaptive modulation parameter and the number of bits of the effective antenna carrier. 11. The UPI data sending device according to claim 8, wherein the frame format information acquisition unit comprises: The second monitoring unit is used to monitor the data area of the general public radio interface basic frame according to the general public radio interface superframe header indication signal to obtain effective bit position information; calculate the general public radio interface according to the effective bit position information The position of the antenna carrier contained in the basic frame in the basic frame of the common public radio interface and the number of bits of the effective antenna carrier; The second calculation unit calculates the number of bytes of the UPI compressed frame and the position of the effective antenna carrier in the UPI compressed frame according to the adaptive modulation parameter and the number of bits of the effective antenna carrier. 12. The universal public radio interface data transmission device according to claim 8, wherein the compression unit comprises: The extraction unit is used to extract the control word and the effective antenna of the general public radio interface basic frame according to the general public radio interface superframe header indication signal, the position of the effective antenna carrier in the general public radio interface basic frame and the number of bits of the effective antenna carrier carrier data; A selection unit, configured to select effective antenna carrier data to be transmitted according to the adaptive modulation parameters; The generation unit is used for generating the general public radio interface compressed frame in a time-division multiplexing manner for the control word and the effective antenna carrier data to be transmitted. 13. A general public radio interface data receiving device, characterized in that the device comprises: a downlink receiving unit, configured to receive microwave data; The microwave demultiplexing unit is used to synchronize the microwave data to extract the microwave payload and microwave overhead; A microwave overhead parsing unit, configured to parse the microwave overhead to extract frame format information of the general public radio interface basic frame; A microwave payload de-adaptation unit, configured to de-adapt the general public radio interface compressed frame from the microwave payload; A downlink synchronization unit, configured to synchronize the UPI compressed frame to generate a UPI superframe header indication signal; A decompression unit, configured to decompress the general public radio interface data according to the general public radio interface superframe header indication signal and the general public radio interface basic frame frame format information; a downlink sending unit, configured to send the UPI data. 14. A general public radio interface data transfer system, characterized in that the system comprises: a first microwave device and a second microwave device; The first microwave device is connected to the remote radio unit, and is used to receive the general public wireless interface data sent by the remote radio unit, convert the general public wireless interface data into microwave data and send it to the second microwave device; and, receive the first microwave data 2. Convert the microwave data sent by the microwave device into common public radio interface data and send it to the remote radio unit; The second microwave device is connected to the baseband processing unit, and is used to receive the microwave data sent by the first microwave device, convert the microwave data into general public radio interface data and send it to the baseband processing unit; and, receive the microwave data sent by the baseband processing unit The UPI data, converting the UPI data into microwave data and sending it to the first microwave device.

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