WO2016191921A1

WO2016191921A1 - Common public radio interface (cpri) data transmission method, related device and system

Info

Publication number: WO2016191921A1
Application number: PCT/CN2015/080250
Authority: WO
Inventors: 成卫东
Original assignee: 华为技术有限公司
Priority date: 2015-05-29
Filing date: 2015-05-29
Publication date: 2016-12-08
Also published as: CN107534688A

Abstract

Disclosed are a common public radio interface (CPRI) data transmission method, a sending device, a receiving device and a system. The sending device comprises: a deletion module for deleting a pre-set number of control words in a common public radio interface (CPRI) frame that needs to be transmitted; a format conversion module for adding a frame head and an interpacket gap (IPG) to the CPRI frame after the deletion module deletes the control words, so as to obtain an Ethernet frame that can be transmitted on an Ethernet physical layer; and a sending module for sending the Ethernet frame to the receiving device via the Ethernet physical layer. By means of the embodiments of the present invention, the transmission efficiency of CPRI data can be improved.

Description

General public wireless interface CPRI data transmission method, related device and system

Technical field

The embodiments of the present invention relate to the field of communications technologies, and in particular, to a general public radio interface CPRI data transmission method, related device and system.

Background technique

The Common Public Radio Interface ("CPRI") specification is a specification for key interfaces within a radio base station developed by a number of companies in the industry. It defines the physical layer and data link layer protocols for Controlling and managing data transmission between a radio equipment controller (Radio Equipment Controller, "REC") and a radio equipment (Radio Equipment, "RE") or between two REs.

At present, in order to reduce the deployment cost and construction difficulty of the base station, it is proposed to adjust the CPRI frame including the CPRI data to an Ethernet frame, so that the CPRI data can be transmitted on the network line through the Ethernet physical layer chip. The CPRI frame is a superframe, and the CPRI data contained therein usually consists of 256 basic frames, each basic frame contains 16 time slots, that is, W=0...15; wherein, W=0 is the control time including the control word. The gap, W=1...15, is a quadrature modulation (IQ) data slot for the base station to arrange the IQ data to be transmitted. In practical applications, the basic structure of an Ethernet frame is a frame header (7 0x55+1 0XD5) + data + frame gap (Inter Package Gap, referred to as "IPG"), that is, the frame header and IPG of the CPRI data need to be encapsulated. The IPG is at least 96 bit time Bit Time, that is, 12 bytes. That is to say, when converting a CPRI frame containing CPRI data into an Ethernet frame, a total of 20 bytes of the header and the IPG are indispensable. However, the maximum Ethernet frame that can be supported by the Gigabit Ethernet (GE) physical layer chip is 10 kb. In many cases, such as the online rate of 1.2288 Gbps, when the CPRI frame is adjusted to an Ethernet frame, The frame header and the IPG are encapsulated so that the converted Ethernet frame is larger than 10 kb. In order to implement GE-based CPRI data transmission, the IQ data bandwidth is squeezed, so that part of the IQ bandwidth cannot be used to transmit IQ data, that is, the IQ bandwidth needs to be sacrificed. The implementation of GE-based CPRI data transmission makes the transmission efficiency of CPRI data low.

Summary of the invention

The embodiment of the invention provides a CPRI data transmission method, a related device and a system, which can improve the transmission efficiency of the CPRI data.

In a first aspect, an embodiment of the present invention provides a sending device, including:

a deleting module, configured to delete a preset number of control words in a CPRI frame of a public wireless interface that needs to be transmitted;

a format conversion module, configured to add a frame header and a frame gap IPG to the CPRI frame after the deletion of the control word by the deleting module, to obtain an Ethernet frame that can be transmitted in the physical layer of the Ethernet;

And a sending module, configured to send the Ethernet frame to the receiving device by using the Ethernet physical layer.

In conjunction with the first aspect, in a first possible implementation manner of the first aspect, the deleting module includes:

An acquiring unit, configured to acquire a current line rate corresponding to a CPRI frame that needs to be transmitted;

a number determining unit, configured to determine, according to the current line rate acquired by the acquiring unit, the number of control words that need to be deleted in the CPRI frame that needs to be transmitted, where the number of control words that need to be deleted The total length is not less than the sum of the total length of the frame header and the IPG;

And a data deleting unit, configured to delete the number of control words determined by the number determining unit in the CPRI frame that needs to be transmitted.

With reference to the first aspect, or the first possible implementation manner of the first aspect, in the second possible implementation manner of the first aspect, the deleted control word is a custom in the CPRI frame that needs to be transmitted Control word or reserved control word.

In a second aspect, the embodiment of the present invention further provides a sending device, including:

a format conversion module, configured to add a frame header and an IPG to the CPRI frame to be transmitted, to obtain an Ethernet frame that can be transmitted on the physical layer of the Ethernet, where the clock corresponding to the CPRI frame is the first clock;

And a sending module, configured to send the Ethernet frame to the receiving device by using the Ethernet physical layer at a second clock, where the second clock is greater than the first clock.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the sending device is further include:

a calculation module, configured to calculate, according to a frame length of the CPRI frame, the first clock, and the second clock, a frame length of the Ethernet frame;

The calculating module is further configured to calculate a first difference between a frame length of the Ethernet frame and a frame length of the CPRI frame, and calculate the first difference and the total of the frame header and the IPG. a second difference in the sum of the lengths;

a packet determining module, configured to determine, according to the second difference value calculated by the calculating module, a packet of an Ethernet frame when performing data transmission;

The sending module is specifically configured to:

Based on the packet, the Ethernet frame is transmitted to the receiving device at the second clock and through the Ethernet physical layer.

With reference to the second aspect, or the first possible implementation manner of the second aspect, in a second possible implementation manner of the second aspect, the first clock is 122.88 MHz, and the second clock is 125 MHz.

In a third aspect, the embodiment of the present invention further provides a receiving device, including:

a receiving module, configured to receive, by using an Ethernet physical layer, an Ethernet frame sent by the sending device, where the Ethernet frame is a preset number of control words in the CPRI frame that the transmitting device deletes and needs to be transmitted, and is deleted after the control word is deleted. The CPRI frame adds a frame header and an IPG to obtain a frame that can be transmitted on the Ethernet physical layer;

a recovery module, configured to remove the frame header of the Ethernet frame and the IPG, to obtain a CPRI frame to be restored;

The recovery module is further configured to recover the preset number of control words deleted from the to-be-recovered CPRI frame, and restore the to-be-recovered CPRI frame to a CPRI frame before deleting the control word.

With reference to the third aspect, in a first possible implementation manner of the third aspect, the preset number is determined according to a corresponding current line rate of a CPRI frame that needs to be transmitted, and the preset number of the deleted ones The total length of the control word is not less than the sum of the total length of the frame header and the IPG.

With reference to the third aspect, or the first possible implementation manner of the third aspect, in the second possible implementation manner of the third aspect, the deleted control word is the self in the CPRI frame that needs to be transmitted. Define control words or reserved control words.

In a fourth aspect, the embodiment of the present invention further provides a receiving device, including:

a receiving module, configured to receive, by the second clock, an Ethernet frame sent by the sending device by using an Ethernet physical layer, where the Ethernet frame is obtained by adding, by the sending device, a frame header and an IPG to a CPRI frame that needs to be transmitted. a frame that can be transmitted on the Ethernet physical layer, the clock corresponding to the CPRI frame is a first clock, and the second clock is greater than the first clock;

And a recovery module, configured to remove the frame header of the Ethernet frame and the IPG, to obtain the CPRI frame.

In conjunction with the fourth aspect, in a first possible implementation manner of the fourth aspect, the first clock is 122.88 MHz, and the second clock is 125 MHz.

In a fifth aspect, the embodiment of the present invention further provides a CPRI data transmission method, including:

The sending device deletes a preset number of control words in the CPRI frame of the public radio interface to be transmitted;

The sending device adds a frame header and a frame gap IPG to the CPRI frame after deleting the control word, and obtains an Ethernet frame that can be transmitted on the Ethernet physical layer;

The transmitting device sends the Ethernet frame to the receiving device by using the Ethernet physical layer.

With reference to the fifth aspect, in a first possible implementation manner of the fifth aspect, the sending device deletes a preset number of control words in a CPRI frame that needs to be transmitted, including:

The sending device acquires a current line rate corresponding to the CPRI frame that needs to be transmitted;

Determining, by the sending device, the number of control words to be deleted in the CPRI frame that needs to be transmitted, according to the current line rate, where the total length of the number of control words that need to be deleted is not less than the frame The sum of the total length of the header and the IPG;

The transmitting device deletes the number of control words in the CPRI frame that needs to be transmitted.

With reference to the fifth aspect, or the first possible implementation manner of the fifth aspect, in a second possible implementation manner of the fifth aspect, the deleted control word is a custom in the CPRI frame that needs to be transmitted Control word or reserved control word.

In a sixth aspect, the embodiment of the present invention further provides a CPRI data transmission method, including:

The sending device adds a frame header and an IPG to the CPRI frame that needs to be transmitted, so that it can be in the physical layer of the Ethernet. The transmitted Ethernet frame, where the clock corresponding to the CPRI frame is the first clock;

The sending device sends the Ethernet frame to the receiving device by using the Ethernet physical layer at a second clock, where the second clock is greater than the first clock.

With reference to the sixth aspect, in a first possible implementation manner of the sixth aspect, the method further includes:

Transmitting, by the sending device, a frame length of the Ethernet frame according to a frame length of the CPRI frame, the first clock, and the second clock;

The sending device calculates a first difference between a frame length of the Ethernet frame and a frame length of the CPRI frame, and calculates a sum of the first difference value and a total length of the frame header and the IPG. Second difference

The sending device determines, according to the second difference, a packet of an Ethernet frame when performing data transmission;

Sending, by the sending device, the Ethernet frame to the receiving device by using the Ethernet physical layer on the second clock, including:

The transmitting device transmits the Ethernet frame to the receiving device at the second clock and through the Ethernet physical layer based on the packet.

With reference to the sixth aspect, or the first possible implementation manner of the sixth aspect, in a second possible implementation manner of the sixth aspect, the first clock is 122.88 MHz, and the second clock is 125 MHz.

In a seventh aspect, the embodiment of the present invention further provides a CPRI data transmission method, including:

The receiving device receives, by the Ethernet physical layer, an Ethernet frame sent by the sending device, where the Ethernet frame is a preset number of control words in the CPRI frame that the transmitting device deletes and needs to be transmitted, and is added to the CPRI frame after deleting the control word. Frame header and IPG, obtained frames that can be transmitted on the Ethernet physical layer;

Receiving, by the receiving device, the frame header of the Ethernet frame and the IPG, to obtain a CPRI frame to be restored;

And the receiving device recovers the preset number of control words deleted from the to-be-recovered CPRI frame, and restores the to-be-recovered CPRI frame to a CPRI frame before deleting the control word.

With reference to the seventh aspect, in a first possible implementation manner of the seventh aspect, the preset number is determined according to a corresponding current line rate of a CPRI frame that needs to be transmitted, and the preset number of the deleted ones The total length of the control word is not less than the sum of the total length of the frame header and the IPG.

With reference to the seventh aspect, or the first possible implementation manner of the seventh aspect, in the second possible implementation manner of the seventh aspect, the deleted control word is a custom in the CPRI frame that needs to be transmitted Control word or reserved control word.

In an eighth aspect, the embodiment of the present invention further provides a CPRI data transmission method, including:

The receiving device receives the Ethernet frame sent by the sending device at the second clock and through the Ethernet physical layer, where the Ethernet frame is that the sending device adds a frame header and an IPG to the CPRI frame that needs to be transmitted, and the obtained device can be in the ether. a frame transmitted by the physical layer of the network, the clock corresponding to the CPRI frame is a first clock, and the second clock is greater than the first clock;

The receiving device removes the frame header of the Ethernet frame and the IPG to obtain the CPRI frame.

In conjunction with the eighth aspect, in a first possible implementation manner of the eighth aspect, the first clock is 122.88 MHz, and the second clock is 125 MHz.

According to a ninth aspect, the embodiment of the present invention further provides a computer storage medium, where the computer storage medium stores a program, and the program includes some or all of the steps of the CPRI data transmission method of the fifth aspect.

According to a tenth aspect, the embodiment of the present invention further provides a computer storage medium, where the computer storage medium stores a program, and the program includes some or all of the steps of the CPRI data transmission method of the sixth aspect.

In an eleventh aspect, an embodiment of the present invention further provides a computer storage medium, where the computer storage medium stores a program, and the program includes some or all of the steps of the CPRI data transmission method of the seventh aspect.

According to a twelfth aspect, the embodiment of the present invention further provides a computer storage medium, where the computer storage medium stores a program, and the program includes some or all of the steps of the CPRI data transmission method of the eighth aspect.

In a thirteenth aspect, the embodiment of the present invention further provides a sending device, including: a transmitter, a receiver, a memory, and a processor.

Wherein the processor performs the following steps:

Deleting a preset number of control words in the CPRI frame of the public radio interface to be transmitted;

Adding a frame header and a frame gap IPG to the CPRI frame after deleting the control word, and obtaining an Ethernet frame that can be transmitted on the Ethernet physical layer;

Based on the transmitter, and transmitting the Ethernet frame to a receiving device through the Ethernet physical layer.

In conjunction with the thirteenth aspect, in a first possible implementation manner of the thirteenth aspect, the processor performs a preset number of control words in a CPRI frame that needs to be transmitted by performing the deleting, and performing the following steps:

Obtain the current line rate corresponding to the CPRI frame to be transmitted;

Determining, according to the current line rate, the number of control words that need to be deleted in the CPRI frame that needs to be transmitted, where the total length of the number of control words that need to be deleted is not less than the frame header and the The sum of the total lengths of the IPGs;

Deleting the number of control words in the CPRI frame that needs to be transmitted.

With reference to the thirteenth aspect, or the first possible implementation manner of the thirteenth aspect, in the second possible implementation manner of the thirteenth aspect, the deleted control word is in the CPRI frame that needs to be transmitted. Custom control word or reserved control word.

In a fourteenth aspect, the embodiment of the present invention further provides a sending device, including: a transmitter, a receiver, a memory, and a processor.

Wherein the processor performs the following steps:

Adding a frame header and an IPG to the CPRI frame to be transmitted, and obtaining an Ethernet frame that can be transmitted on the physical layer of the Ethernet, where the clock corresponding to the CPRI frame is the first clock;

And transmitting, according to the transmitter, the Ethernet frame to the receiving device at the second clock and through the Ethernet physical layer, wherein the second clock is greater than the first clock.

In conjunction with the fourteenth aspect, in a first possible implementation of the fourteenth aspect, the processor is further configured to perform the following steps:

Calculating a frame length of the Ethernet frame according to a frame length of the CPRI frame, the first clock, and the second clock;

Calculating a first difference between a frame length of the Ethernet frame and a frame length of the CPRI frame, and calculating a second difference between the first difference and a sum of the frame header and the total length of the IPG;

Determining, according to the second difference, a packet of an Ethernet frame when performing data transmission;

The processor is configured to send the Ethernet frame to the receiving device by using the Ethernet physical layer, and perform the following steps:

In conjunction with the fourteenth aspect, or the first possible implementation of the fourteenth aspect, in a second possible implementation of the fourteenth aspect, the first clock is 122.88 MHz, and the second clock is 125MHz.

In a fifteenth aspect, the embodiment of the present invention further provides a receiving device, including: a transmitter, a receiver, a memory, and a processor.

Wherein the processor performs the following steps:

Receiving, according to the receiver, an Ethernet frame sent by the sending device by using an Ethernet physical layer, where the Ethernet frame is a preset number of control words in the CPRI frame that the transmitting device deletes and needs to be transmitted, and the control word is deleted. The subsequent CPRI frame adds a frame header and an IPG to obtain a frame that can be transmitted on the Ethernet physical layer;

Removing the frame header of the Ethernet frame and the IPG, to obtain a CPRI frame to be restored;

And recovering the preset number of control words from the to-be-recovered CPRI frame, and restoring the to-be-recovered CPRI frame to a CPRI frame before deleting the control word.

With reference to the fifteenth aspect, in a first possible implementation manner of the fifteenth aspect, the preset number is determined according to a corresponding current line rate of a CPRI frame that needs to be transmitted, and the preset is deleted. The total length of the number of control words is not less than the sum of the total length of the frame header and the IPG.

With reference to the fifteenth aspect, or the first possible implementation manner of the fifteenth aspect, in the second possible implementation manner of the fifteenth aspect, the deleted control word is in the CPRI frame that needs to be transmitted. Custom control word or reserved control word.

In a sixteenth aspect, an embodiment of the present invention provides a receiving device, including: a transmitter, a receiver, a memory, and a processor.

Wherein the processor performs the following steps:

Receiving, according to the receiver, an Ethernet frame sent by the sending device by using the Ethernet physical layer at the second clock, where the Ethernet frame is that the sending device adds a frame header and an IPG to the CPRI frame that needs to be transmitted, a frame that can be transmitted on the Ethernet physical layer, the clock corresponding to the CPRI frame is a first clock, and the second clock is greater than the first clock;

The frame header of the Ethernet frame and the IPG are removed to obtain the CPRI frame.

In conjunction with the sixteenth aspect, in a first possible implementation of the sixteenth aspect, the first clock is 122.88 MHz, and the second clock is 125 MHz.

In a seventeenth aspect, the embodiment of the present invention further provides a CPRI data transmission system, including: a sending device and a receiving device, where

The sending device is configured to delete a preset number of control words in a CPRI frame of a public radio interface that needs to be transmitted; add a frame header and a frame gap IPG to the CPRI frame after deleting the control word, and obtain an ether that can be transmitted in the physical layer of the Ethernet. a network frame; sending, by the Ethernet physical layer, the Ethernet frame to the receiving device;

The receiving device is configured to receive, by the Ethernet physical layer, an Ethernet frame sent by the sending device, remove the frame header of the Ethernet frame, and the IPG, to obtain a CPRI frame to be restored; And deleting the preset number of control words in the CPRI frame to be restored, and restoring the to-be-recovered CPRI frame to a CPRI frame before deleting the control word.

In an eighteenth aspect, the embodiment of the present invention provides a CPRI data transmission system, including: a sending device and a receiving device, where

The sending device is configured to add a frame header and an IPG to the CPRI frame that needs to be transmitted, and obtain an Ethernet frame that can be transmitted on the physical layer of the Ethernet, where the clock corresponding to the CPRI frame is the first clock; The Ethernet physical layer sends the Ethernet frame to the receiving device, where the second clock is greater than the first clock;

The receiving device is configured to receive, by the second clock, an Ethernet frame sent by the sending device by using the Ethernet physical layer; removing the frame header of the Ethernet frame and the IPG, and obtaining the Said CPRI frame.

In the embodiment of the present invention, when the CPRI data is transmitted through the Ethernet physical layer chip, the partial control word is deleted in the CPRI frame, the IQ data is transmitted at the position of the deleted control word, or the operating clock of the control Ethernet is greater than by the clock domain conversion. The CPRI clock makes the CPRI data transmission based on the Ethernet physical layer no longer occupy the IQ data space, thereby improving the CPRI data transmission efficiency and enhancing the system performance.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any creative work.

FIG. 1 is a schematic diagram of a system for applying an application scenario according to an embodiment of the present disclosure;

1b is a schematic diagram of a system for applying an application scenario according to an embodiment of the present invention;

FIG. 1 is a schematic diagram of another system of application scenarios provided by an embodiment of the present invention;

FIG. 1 is a schematic diagram of a system of another application scenario provided by an embodiment of the present invention;

2 is a schematic structural diagram of a sending device according to an embodiment of the present invention;

3 is a schematic structural diagram of an Ethernet frame according to an embodiment of the present invention;

4 is a schematic structural diagram of a superframe according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a receiving device according to an embodiment of the present disclosure;

6 is a schematic structural diagram of implementing CPRI data transmission by deleting a control word according to an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of another sending device according to an embodiment of the present disclosure;

FIG. 8 is a schematic structural diagram of another receiving device according to an embodiment of the present disclosure;

FIG. 9 is a schematic structural diagram of implementing CPRI data transmission by transforming an Ethernet physical layer clock according to an embodiment of the present invention;

FIG. 10 is a schematic structural diagram of an Ethernet frame grouping according to an embodiment of the present invention;

11 is a schematic flowchart of a CPRI data transmission method according to an embodiment of the present invention;

FIG. 12 is a schematic flowchart diagram of another CPRI data transmission method according to an embodiment of the present invention;

FIG. 13 is a schematic flowchart of still another CPRI data transmission method according to an embodiment of the present invention; FIG.

FIG. 14 is a schematic flowchart of still another CPRI data transmission method according to an embodiment of the present invention; FIG.

FIG. 15 is a schematic structural diagram of still another sending device according to an embodiment of the present disclosure;

FIG. 16 is a schematic structural diagram of still another transmitting device according to an embodiment of the present disclosure;

FIG. 17 is a schematic structural diagram of still another receiving device according to an embodiment of the present disclosure;

FIG. 18 is a schematic structural diagram of still another receiving device according to an embodiment of the present disclosure;

19 is a schematic structural diagram of a CPRI data transmission system according to an embodiment of the present invention;

FIG. 20 is a schematic structural diagram of another CPRI data transmission system according to an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

It should be understood that the technical solution of the embodiments of the present invention can be applied to various types of wireless communication systems, such as Code Division Multiple Access ("CDMA") system, Wideband Code Division Multiple Access (Wideband Code). Division Multiple Access (WCDMA) system, Long Term Evolution (LTE) system, Universal Mobile Telecommunication System (UMTS) or Wireless Local Area Networks (referred to as "Wireless Local Area Networks") "WLAN") communication system, etc. The application scenario may be an indoor distribution system or an outdoor distribution system, which is not limited in the embodiment of the present invention.

Specifically, as shown in FIG. 1a, the CPRI specification can be used for data transmission between a base station baseband unit and a radio remote unit (Radio Remote Unit (RRU)), and between the RRU and the RRU. Alternatively, as shown in FIG. 1b, the CPRI specification can also be used for data transmission between a base station baseband unit and an extension unit, and between an extension unit and an RRU. For example, the method in the embodiment of the present invention may be specifically applied to data transmission of a CPRI interface related to the following system architecture: RF remote system, analog feed digital signal distribution system, base station digital baseband feed signal distribution system, etc.

As shown in FIG. 1a, in the radio remote system, the embodiment of the present invention can be applied to data transmission between a base station baseband unit and an RRU, or a CPRI interface used between an RRU and an RRU.

As shown in FIG. 1c, it is a schematic diagram of another application scenario provided by the embodiment of the present invention, which is specifically a schematic diagram of an analog feed digital signal distribution system. In the analog feed digital signal distribution system, in order to realize the remote and expand the coverage of the base station and reduce the uplink noise superposition, the analog feed digital signal distribution system adopts the distribution of the fiber + five-wire, fiber + fiber repeater. the way. As shown in FIG. 1c, the embodiment of the present invention is also applicable to data of a CPRI interface between an access unit and an extension unit, between an extension unit and an extension unit, between an extension unit and an RRU, or between an RRU and an RRU. transmission.

As shown in FIG. 1d, it is a system schematic diagram of another application scenario provided by the embodiment of the present invention, which is specifically a schematic diagram of a base station digital baseband feed signal distribution system. The difference between the base station digital baseband feed signal distribution system and the above analog feed digital signal distribution system is mainly to convert the access unit into a baseband unit, and the baseband unit directly feeds the baseband signal into the extension unit. As shown in FIG. 1d, in the base station digital baseband feed signal distribution system, mainly used between the baseband unit and the extension unit, between the extension unit and the extension unit, between the extension unit and the RRU, between the RRU and the RRU Data transmission using the CPRI interface.

2 is a schematic structural diagram of a sending device according to an embodiment of the present invention. Specifically, the sending device in the embodiment of the present invention may include a deleting module 11, a format converting module 12, and a sending module 13. among them,

The deleting module 11 is configured to delete a preset number of control words in a CPRI frame of a public radio interface that needs to be transmitted.

It should be noted that the sending device that is implemented by the present invention may specifically be a baseband processing unit, an analog feed digital signal distribution system, or an extension unit in a baseband digital baseband feed signal distribution system, including the above-mentioned radio remote unit. It can be used as a device at the transmitting end when performing CPRI data transmission.

In a specific embodiment, the CPRI frame to be transmitted is a superframe in the CPRI protocol, and the superframe can be used as a basic frame for Ethernet data transmission. The one superframe is composed of 256 CPRI basic frames, and the frame length of one CPRI basic frame is: 1Tc=1/3.84MHz=260.416667ns. A CPRI basic frame contains 16 time slots: W=0...15, W=0 is a control time slot including a control word, and W=1...15 is an IQ data time slot for the base station to arrange IQ data to be transmitted. The word length T corresponds to the current line rate. For example, the CPRI basic frame structure corresponding to the 1228.8 Mbit/s line rate in the CPRI protocol is 16 (bit width) * 16 (time slot).

Since the Ethernet data transmission is based on basic frame data transmission, the basic structure of an Ethernet physical layer, that is, the most basic structure of the Ethernet frame is the frame header (7 0x55+1 0XD5, ie 8 bytes) + data + frame gap IPG, where IPG is at least 96 Bit Time, ie 12 bytes. That is to say, when performing frame format conversion and converting a CPRI frame, that is, a super frame, into an Ethernet frame suitable for Ethernet physical layer transmission, encapsulating the frame header and the frame gap IPG is essential, which may result in The Ethernet frame obtained after the frame format conversion of the CPRI frame to be transmitted exceeds the maximum basic frame length supported by the Ethernet physical layer chip. FIG. 3 is a schematic structural diagram of an Ethernet frame according to an embodiment of the present invention. Specifically, the maximum basic frame supported by the GE physical layer chip is 10 kb, and the online rate is 1.2288 Gbps, and the length of one CPRI superframe (including 256 CPRI basic frames, that is, the chip shown in FIG. 3) is 8192 bytes, which is just less than 10kb, is more than 10kb after being converted to an Ethernet frame, that is, after adding a frame header (8 bytes) and IPG (12 bytes). This will result in crowding out IQ bandwidth. Therefore, before the frame format conversion, the preset number of control words can be deleted by the deleting module 11, and the position of the deleted control word is used for transmitting IQ data to compensate the bandwidth corresponding to the frame header and the IPG, thereby eliminating the sacrifice IQ bandwidth to implement GE-based CPRI data transmission. The preset number, that is, the number of deleted control words, may be a fixed number of pre-configured numbers, such as 20, or a number that needs to be deleted according to the current line rate of the CPRI frame.

The format conversion module 12 is configured to add a frame header and a frame gap IPG to the CPRI frame after the deletion of the control word by the deleting module 11, to obtain an Ethernet frame that can be transmitted on the Ethernet physical layer.

The sending module 13 is configured to send the ethernet to the receiving device by using the Ethernet physical layer Net frame.

In a specific embodiment, after the deletion module 11 deletes a preset number of control words to implement bandwidth compensation for a CPRI frame that needs to be transmitted, that is, a superframe, the format conversion module 12 may add a frame header to the CPRI frame after deleting the control word. And IPG, to meet the basic frame structure of the Ethernet physical layer, to obtain Ethernet frames that can be transmitted on the Ethernet network line. The sending module 13 sends the Ethernet frame to the receiving device through the Ethernet network cable, so that when receiving the Ethernet frame, the receiving device removes the frame header and the IPG of the package to obtain CPRI data, and is based on the structure of the CPRI superframe. The deleted control word is restored, and the CPRI frame before the deletion of the control word is restored, that is, the standard CPRI frame structure is restored.

Further, in an optional embodiment, the deleting module 11 may include (not shown):

The obtaining unit 111 is configured to obtain a current line rate corresponding to the CPRI frame that needs to be transmitted;

The number determining unit 112 is configured to determine, according to the current line rate acquired by the acquiring unit 111, the number of control words that need to be deleted in the CPRI frame that needs to be transmitted, where the number of the control words that need to be deleted is determined. The total length of the control word is not less than the sum of the total length of the frame header and the IPG;

The data deleting unit 113 is configured to delete the number of control words determined by the number determining unit 112 in the CPRI frame that needs to be transmitted.

In a specific embodiment, the CPRI frame, that is, the superframe in the CPRI protocol, includes 256 basic frames, and 256 control words are nested step by step (each basic frame includes one control word). Specifically, as shown in FIG. 4, it is a schematic structural diagram of a superframe according to an embodiment of the present invention. The 256 control words that are nested step by step can be programmed into 64 subchannels for every 4 groups. The subchannel number is Ns=0...63, and the control word number Xs=0...3 in each subchannel, then the control word number X=Ns+64*Xs in a nest. Among them, the combination of control words in different morphological areas defines different uses, such as synchronous timing, slow control and management, factory customization, etc., and some reserved control words. Optionally, the deleted control word may be a custom control word or a reserved control word in the CPRI frame to be transmitted.

Specifically, since the Ethernet transmission is based on basic frame transmission, the basic structure of the basic frame of a physical layer is frame header + data + IPG. In the frame structure of the Ethernet, the frame header and the IPG are indispensable. In order to avoid the sacrifice of IQ bandwidth to implement GE-based CPRI data transmission, the transmitting end, that is, the transmitting device can obtain the unit before converting the CPRI frame, that is, the superframe of the CPRI data format into an Ethernet frame. The current line rate corresponding to the current superframe is obtained by the CPRI frame that needs to be transmitted, and the number determining unit 112 determines the number of control words, such as a custom control word or a reserved control word, that need to be deleted according to the current line rate. The total length of the corresponding control word is not less than the sum of the total length of the frame header and the IPG (ie, 20 bytes), so that the data deleting unit 113 can delete the number of control words determined by the number determining unit 112, that is, delete 20 bytes or 20 bytes. The above control word uses the position of the delete control word for transmitting IQ data, so that the occupied IQ bandwidth caused by converting the CPRI frame into an Ethernet frame is avoided.

Referring to FIG. 5, it is a schematic structural diagram of a receiving device according to an embodiment of the present invention. Specifically, the receiving device in the embodiment of the present invention may include a receiving module 21 and a recovery module 22. among them,

The receiving module 21 is configured to receive, by using an Ethernet physical layer, an Ethernet frame sent by the sending device, where the Ethernet frame is a preset number of control words in the CPRI frame that the sending device needs to transmit, and is deleted. The CPRI frame after the word adds the frame header and IPG, and the obtained frame can be transmitted on the Ethernet physical layer.

It should be noted that, the receiving device that is implemented by the present invention may specifically be the RRU including the above-mentioned radio remote unit, analog feed digital signal distribution system or base station digital baseband feed signal distribution system, etc. during CPRI data transmission. Can be used as a device at the receiving end.

The data transmission of the Ethernet is based on basic frame data transmission, and the CPRI frame to be transmitted is a superframe in the CPRI protocol, and the superframe can be used as a basic frame of the Ethernet GE.

The recovery module 22 is configured to remove the frame header of the Ethernet frame and the IPG, to obtain a CPRI frame to be restored;

The recovery module 22 is further configured to recover the preset number of control words deleted from the to-be-recovered CPRI frame, and restore the to-be-recovered CPRI frame to a CPRI frame before deleting the control word.

Optionally, the preset number is determined according to a corresponding current line rate of the CPRI frame that needs to be transmitted, and the total length of the deleted preset number of control words is not less than the frame header and the IPG. The sum of the total lengths.

Further optionally, the deleted control word is a custom in the CPRI frame that needs to be transmitted. Control word or reserved control word.

In a specific embodiment, after the receiving device receives the Ethernet frame sent by the Ethernet network cable, that is, the Ethernet physical layer, the recovery module 22 can remove the frame header and the IPG of the Ethernet frame, and extract the CPRI frame. Data, and recovering the deleted control word based on the structure of the CPRI superframe, recovering the standard CPRI superframe structure before deleting the control word.

Taking the line rate of 1228.8 Mbps as an example, the length of the CPRI superframe of the CPRI data format is 8192 Bytes. Considering the frame header + frame gap totaling 20 bytes, only the control words of the 10 basic frames of the CPRI data format need to be deleted, for a total of 20 bytes. The problem of crowding out the IQ data space is avoided, resulting in a decrease in the efficiency of CPRI data transmission. As shown in FIG. 6 , it is a schematic structural diagram of implementing CPRI data transmission by deleting a control word according to an embodiment of the present invention. The FIG. 6 includes a frame of a CPRI superframe (8192 Byte) of the CPRI data format of a transmitting device, that is, a transmitting end. The frame structure of the Ethernet frame (8192 Byte) transmitted by the Ethernet physical layer chip format converted after the control word is deleted, and the frame structure of the CPRI superframe (8192 Byte) after the receiving device restores the control word. Specifically, the sending device, that is, the sending end, can control, by using the deleting module 11, to delete the control words in the 10 basic frames including the custom control word (more than 10 custom control words can be deleted), the deleted 10 control words CM is the CM in the gray part of the figure (only the CM of 2 is shown in Figure 6), a total of 20 bytes, to make up for the occupation of Ethernet frame header + frame gap of 20 bytes, to achieve bandwidth compensation. The transmitting end converts the CPRI frame after the deletion control word by the format conversion module 12, increases the frame header and the IPG, and obtains the basic frame, that is, the Ethernet frame, transmitted by the Ethernet physical layer chip format, and sends the Ethernet frame through the sending module 13. The network frame is sent to the receiving device. After the receiving device of the peer receiving device receives the Ethernet frame through the receiving module 21, the recovery module 22 can remove the frame header and the IPG, extract the CPRI frame data, and recover the deleted control word, thereby restoring to the standard CPRI superframe structure.

Similarly, the line rate of 1.2288 Gbps is taken as an example. For the bandwidth occupied by the CPRI superframe with a line rate of 1.2288 Gbps, the amount of bandwidth occupied by the control plane (that is, the bandwidth occupied by the control word) is: 2 bytes * 8 bits * 256 (code Chip)*150 (superframe)*100(10ms)=61.44Mbps; the frame header of the Ethernet frame and the IPG occupy the IQ bandwidth (20 bytes per superframe), and the occupied bandwidth is: 20 bytes*8 Bit *150 (superframe) *100 (10ms) = 2.4Mbps; remove the frame header and IPG bandwidth of the control plane and Ethernet frame, The remaining IQ bandwidth is 1228.8M*(4/5)-61.44M-2.4M=919.2Mbps. Therefore, in the above behavior example, the maximum antenna carrier mapping A*C number supported in the uplink direction is: 919.2M/[2 (double sampling)*2(IQ)*10 (data bit width)*256(chip)*150(super Frame) *100 (10ms)] = 5 (down to the entire value). Where A is the number of antennas and C is the number of carriers.

At this time, for the mobile communication carrier system, if 6 A*C numbers are needed to represent one carrier, or when a single network cable needs to carry more carrier data rates, a higher data compression ratio is needed, or multiple roots are needed. The network cable performs load sharing. However, if a higher data compression ratio is adopted, the system performance will be degraded; and the load sharing method through multiple network cables will occupy more ports and increase the deployment cost.

In the embodiment of the present invention, when the bandwidth compensation is implemented by the deletion control word, since the 20 Byte control word is deleted, the IQ data transmission is 20 Bytes larger, that is, the IQ bandwidth is increased: 20 bytes * 8 bits * 150 (super frame) * 100 (10ms) = 2.4Mbps. For the same behavior example above, the maximum number of A*Cs supported in the uplink direction is: (919.2M+2.4M)/[2 (double sampling)*2(IQ)*10 (data bit width)*256(chip)* 150 (superframe) * 100 (10 ms)] = 6 (downwardly rounded value), the bandwidth can be compensated by the deletion control word to increase the maximum A*C number supported in the uplink and / or downlink direction. For the mobile communication carrier system, if 6 A*C numbers are needed to represent one carrier, or when a single network cable needs to carry more carrier data rates, the network deployment cost can be effectively reduced.

When the CPRI data is transmitted through the physical layer chip of the Ethernet, the part of the control word is deleted in the CPRI frame, so that the IQ data space is no longer occupied when the GE-based CPRI data transmission is implemented, so that the single network cable can be improved. The data transmission efficiency enhances the application scenario of a single network cable in the carrier system, and saves port occupation and network cable usage, reduces network deployment cost and construction difficulty, and enhances system performance.

FIG. 7 is a schematic structural diagram of another sending device according to an embodiment of the present invention. Specifically, the sending device in the embodiment of the present invention includes a format converting module 31 and a sending module 32. among them,

The format conversion module 31 is configured to add a frame header and an IPG to the CPRI frame that needs to be transmitted, and obtain an Ethernet frame that can be transmitted on the physical layer of the Ethernet, where the clock corresponding to the CPRI frame is the first clock;

The sending module 32 is configured to send the Ethernet frame to the receiving device by using the Ethernet physical layer at a second clock, where the second clock is greater than the first clock.

In a specific embodiment, Ethernet-based CPRI data transmission can also be implemented by changing the working clock of the Ethernet physical layer chip. Specifically, the working clock corresponding to the CPRI frame is a first clock, that is, the sending device transmits a CPRI frame on the first clock, and the working clock corresponding to the Ethernet frame is a second clock, that is, the sending device can pass The sending module 32 sends an Ethernet frame on the second clock, and transmits an Ethernet frame through the second clock, where the second clock is greater than the first clock.

Further, in an optional embodiment, the sending device may further include:

The calculating module 33 is configured to calculate, according to the frame length of the CPRI frame, the first clock, and the second clock, a frame length of the Ethernet frame.

The calculating module 33 is further configured to calculate a first difference between a frame length of the Ethernet frame and a frame length of the CPRI frame, and calculate the first difference value with the frame header and the IPG a second difference in the sum of the total lengths;

a packet determining module 34, configured to determine, according to the second difference value calculated by the calculating module 33, a packet of an Ethernet frame when performing data transmission;

The sending module 32 can be specifically configured to:

Optionally, the first clock may be specifically 122.88 MHz, and the second clock may be specifically 125 MHz.

In a specific embodiment, the clock domain conversion, that is, the control of the Ethernet operating clock (second clock) is greater than the CPRI clock (first clock), enabling more data to be transmitted at the same time, thereby implementing Ethernet-based CPRI data transmission, instead of crowding out the IQ data space, improves CPRI data transmission efficiency.

Further, when the first clock is smaller than the second clock, the difference between the length of the converted Ethernet frame and the length of the CPRI frame (ie, the first difference) is often greater than 20 bytes, that is, after the frame is deducted There is a spare byte (that is, the second difference) after the header and IPG 20 bytes, for example, the first clock is 122.88MHz, when the second clock is 125MHz, the difference between the length of the Ethernet frame and the length of the CPRI frame is 12.333 bytes after deducting 20 bytes. Therefore, in consideration of actual implementation, Ethernet frames can also be grouped according to the vacant bytes to transmit Ethernet frames based on the packets. Specifically, the frame length of the current CPRI frame, the first clock, and the frame length of the Ethernet frame corresponding to the second clock are calculated by the calculation module 33, and the frame length of the Ethernet frame and the frame length of the CPRI frame are further calculated. a first difference, and a second difference between the first difference and a length of the frame header and the IPG, such that the packet determining module 34 is capable of determining, according to the second difference, a packet of the Ethernet frame when the data transmission is performed. Thus, the transmitting module 32 is capable of transmitting Ethernet frames based on the packet.

FIG. 8 is a schematic structural diagram of another receiving device according to an embodiment of the present invention. Specifically, the receiving device in the embodiment of the present invention may include a receiving module 41 and a recovery module 42. among them,

The receiving module 41 is configured to receive, by the second clock, an Ethernet frame sent by the sending device by using an Ethernet physical layer, where the Ethernet frame is the sending device adds a frame header and an IPG to the CPRI frame that needs to be transmitted. Obtaining a frame that can be transmitted on the physical layer of the Ethernet, the clock corresponding to the CPRI frame is a first clock, and the second clock is greater than the first clock;

The recovery module 42 is configured to remove the frame header of the Ethernet frame and the IPG to obtain the CPRI frame.

Specifically, the Ethernet-based CPRI data transmission can also be implemented by changing the working clock of the Ethernet physical layer chip. The working clock corresponding to the CPRI frame is the first clock, that is, the sending device can transmit the CPRI frame on the first clock, and the working clock corresponding to the Ethernet frame is the second clock, that is, the sending device can be in the The second clock transmits an Ethernet frame, and the second clock is greater than the first clock. The receiving device receives the Ethernet frame sent by the sending device at the second clock through the receiving module 41.

In a specific embodiment, after the receiving device receives the Ethernet frame sent by the Ethernet network cable, that is, the Ethernet physical layer, the recovery module 22 can remove the frame header and the IPG of the Ethernet frame and the vacant byte. , extract the CPRI data and restore it to the standard CPRI before the transform clock domain Superframe structure.

Specifically, as shown in FIG. 9 , which is a schematic structural diagram of implementing CPRI data transmission by transforming an Ethernet physical layer clock according to an embodiment of the present invention, where FIG. 9 includes a CPRI data of a CPRI data format in a transmitting device, that is, a transmitting end. a frame structure diagram of a frame (8192 Byte), a frame structure diagram of an Ethernet frame (8333.333 Byte) transmitted by an Ethernet physical layer chip format obtained by converting the frame format of the CPRI superframe, wherein a CPRI frame corresponding to the transmitting device The first clock, that is, the CPRI data clock, is 122.88 MHz, and the second clock corresponding to the Ethernet physical layer, that is, the Ethernet physical layer clock, is 125 MHz. The rate difference between the Ethernet GE port and the CPRI port is (125-122.88)*8=16.96Mbps. The length of a CPRI superframe is 8192 Bytes, and the length of the corresponding Ethernet physical layer frame, that is, the Ethernet frame is 8192 Byte*(125/122.88)=8333.333 Byte. The Ethernet frame corresponds to the CPRI superframe by 8333.333-8192. =141.333Byte (first difference), after deducting the 20Byte frame header and IPG length, there is still 121.333Byte free bytes (second difference). As shown in FIG. 9, when the transmitting device, that is, the transmitting end performs format conversion on the superframe (8192 Byte) of the CPRI data format by the format conversion module 12, it can add a frame header, an IPG, and a spare byte (121.333 Byte) to the CPRI superframe. In order to meet the basic frame structure of the Ethernet physical layer, the basic frame transmitted by the Ethernet physical layer chip format is converted into an Ethernet frame (8333.333 Byte), thereby realizing transmission of CPRI data through the Ethernet frame.

Further, in consideration of the actual implementation, the sending device may further determine the Ethernet according to the vacant number of bytes, that is, according to the difference between the length of the Ethernet frame and the CPRI superframe and the length of the frame header and the IPG. Grouping of frames. Optionally, as shown in FIG. 10, it is a schematic diagram of an Ethernet frame grouping structure provided by an embodiment of the present invention. Specifically, according to the spare byte number is 121.333 Byte, the transmitting device can treat each of the three Ethernet basic frames as a group, as shown in FIG. 10, the first Ethernet frame has a spare space of 122 bytes, and the latter two Ethernets The frame has a spare space of 121 Bytes, that is, one of the three Ethernet frames of the packet has a length of 8334 Bytes, and the remaining two lengths are 8333 Bytes (in FIG. 10, PHY represents the frame header + IPG in FIG. 9 , and the CPRI data is the picture in FIG. 9 Control word CM+IQ data). The transmitting module 32 can transmit an Ethernet frame including CPRI data to the receiving device based on the packet. After the receiving device receives the Ethernet frame sent by the sending device through the receiving module 41, the receiving module 42 removes the frame header, the IPG and the vacant byte of the Ethernet frame, extracts the CPRI data, and restores the CPRI data. Complex to the standard CPRI superframe structure before the clock domain is transformed.

In the embodiment of the present invention, the working clock of the Ethernet is controlled to be larger than the CPRI clock by the clock domain conversion, so that more data can be transmitted on the Ethernet network line in the same time, for example, the working frequency of the Ethernet physical layer is 125 MHz. The CPRI working clock takes 122.88MHz. For a superframe (Ethernet basic frame), 141.333 bytes of data can be transmitted, except for the frame header and the IPG, which has a total of 20 bytes and 121.333 bytes remaining, thereby realizing the transformation of the Ethernet physical layer chip. The working clock compensates the bandwidth of the CPRI frame, and no longer squeezes the IQ data space, and does not need to sacrifice the IQ bandwidth to implement the GE-based CPRI data transmission, thereby solving the problem of low efficiency of CPRI data transmission.

FIG. 11 is a schematic flowchart of a CPRI data transmission method according to an embodiment of the present invention. The method in the embodiment of the present invention may be specifically applied to a sending device. Specifically, the method may include the following steps:

S101: The sending device deletes a preset number of control words in the CPRI frame of the public radio interface that needs to be transmitted.

It should be noted that the method implemented by the present invention may be specifically applied to a sending device, where the sending device may specifically include a baseband processing unit, an analog feed digital signal distribution system, or a base station digital baseband in the radio remote unit. An extension unit or the like fed into the signal distribution system can serve as a device of the transmitting end when performing CPRI data transmission.

In a specific embodiment, the CPRI frame to be transmitted is a superframe in the CPRI protocol, and the superframe can be used as a basic frame for Ethernet data transmission.

S102: The sending device adds a frame header and a frame gap IPG to the CPRI frame after deleting the control word, to obtain an Ethernet frame that can be transmitted on the Ethernet physical layer.

Since the data transmission of the Ethernet is based on basic frame data transmission, the basic structure of an Ethernet physical layer, that is, the most basic structure of the Ethernet frame is a frame header (8 bytes) + data + IPG (12 bytes). ). That is to say, when converting a CPRI frame, that is, a superframe, into an Ethernet frame suitable for Ethernet physical layer transmission, encapsulating the frame header and the IPG is indispensable, which may result in the CPRI frame to be transmitted. The Ethernet frame obtained after the frame format conversion exceeds the maximum basic frame supported by the Ethernet physical layer chip. length. For example, if the maximum physical frame supported by the GE physical layer chip is 10 kb and the online rate is 1.2288 Gbps, the length of a CPRI superframe is 8192 bytes, which is just less than 10 kb, and is converted into an Ethernet frame, that is, plus After the frame header and IPG, it exceeds 10kb, which will result in the crowding of IQ bandwidth. Therefore, before the frame format conversion, a preset number of control words can be deleted, and the position of the deleted control word is used to transmit IQ data to compensate for the bandwidth occupied by the frame header and the IPG, thereby eliminating the need to sacrifice IQ bandwidth. GE-based CPRI data transmission. The preset number, that is, the number of deleted control words, may be a fixed number of pre-configured numbers, such as 20, or a number that needs to be deleted according to the current line rate of the CPRI frame.

S103: The sending device sends the Ethernet frame to the receiving device by using the Ethernet physical layer.

In an optional embodiment, the preset number may be a number of control words that need to be deleted according to a current line rate of the CPRI frame. Specifically, the sending device deletes a preset number of control words in the CPRI frame to be transmitted, which may be specifically: the sending device acquires a current line rate corresponding to the CPRI frame to be transmitted; and the sending device is configured according to the current line rate. Determining, in the CPRI frame that needs to be transmitted, the number of control words to be deleted, wherein the total length of the number of control words that need to be deleted is not less than a sum of the total length of the frame header and the IPG; The transmitting device deletes the number of control words in the CPRI frame that needs to be transmitted.

Specifically, the CPRI frame, that is, the superframe in the CPRI protocol, includes control words that define different uses, such as synchronous timing, slow control and management, factory customization, and the like, and some reserved control words. Further optionally, the deleted control word is a custom control word or a reserved control word in the CPRI frame that needs to be transmitted.

In a specific embodiment, after the sending device deletes a preset number of control words to implement bandwidth compensation for a CPRI frame that needs to be transmitted, that is, a superframe, the frame header and the IPG may be added to the CPRI frame after the control word is deleted, and the frame is added. Format conversion to meet the basic frame structure of the Ethernet physical layer to obtain Ethernet frames that can be transmitted over the Ethernet network. Further, the sending device may send the Ethernet frame to the receiving device by using an Ethernet network cable, so that when receiving the Ethernet frame, the receiving device removes the frame header and the IPG of the package, and restores the deleted control word. , get the CPRI data before deleting the control word, ie recovery It is a standard CPRI frame structure. Therefore, the situation that the IQ bandwidth is occupied after converting the CPRI frame into the Ethernet frame is avoided, and the CPRI data transmission efficiency is improved.

FIG. 12 is a schematic flowchart of another CPRI data transmission method according to an embodiment of the present invention. The method in the embodiment of the present invention may be specifically applied to a receiving device. Specifically, the method may include the following. step:

S201: The receiving device receives, by using an Ethernet physical layer, an Ethernet frame sent by the sending device, where the Ethernet frame is a preset number of control words in the CPRI frame that the transmitting device deletes and needs to be transmitted, and is a CPRI after deleting the control word. Frames are added to the frame header and IPG to obtain frames that can be transmitted at the Ethernet physical layer.

It should be noted that the method implemented by the present invention may be specifically applied to a receiving device, and the receiving device may specifically include the foregoing radio remote unit, analog feed digital signal distribution system, or base station digital baseband feed signal distribution system. The RRU or the like in the middle can serve as a device at the receiving end when performing CPRI data transmission.

S202: The receiving device removes the frame header of the Ethernet frame and the IPG, to obtain a CPRI frame to be restored.

S203: The receiving device recovers the preset number of control words deleted from the to-be-recovered CPRI frame, and restores the to-be-recovered CPRI frame to a CPRI frame before deleting the control word.

Further optionally, the deleted control word is a custom control word or a reserved control word in the CPRI frame that needs to be transmitted.

In a specific embodiment, after receiving the Ethernet frame sent by the sending device through the Ethernet network cable, that is, the Ethernet physical layer, the receiving device can remove the frame header and the IPG of the Ethernet frame, extract the CPRI frame data, and perform CPRI based on the CPRI. The structure of the superframe restores the deleted control word and restores the standard CPRI superframe structure before the deletion of the control word.

Taking the line rate of 1228.8 Mbps as an example, the length of the CPRI superframe of the CPRI data format is 8192 Bytes. Considering the frame header + IPG total of 20 Bytes, only 10 basic frames of the CPRI data format are required. The control word is deleted, a total of 20 bytes, which avoids the problem of crowding out the IQ data space and causing the CPRI data transmission efficiency to decrease. As shown in FIG. 6, the transmitting device, that is, the transmitting end, can control to delete the control words in the 10 basic frames including the custom control word (or delete more than 10 custom control words), for a total of 20 bytes, to compensate for the Ethernet frame header. +IPG takes up a total of 20 bytes to achieve bandwidth compensation. The sending device performs format conversion on the CPRI frame after deleting the control word, adds the frame header and the IPG, and obtains the basic frame, that is, the Ethernet frame, transmitted by the Ethernet physical layer chip format, and sends the Ethernet frame to the receiving device. After receiving the Ethernet frame, the receiving end of the peer receiving device can remove the frame header and the IPG, extract the CPRI frame data, and recover the deleted control word, thereby restoring to the standard CPRI superframe structure.

Similarly, the line rate of 1.2288 Gbps is taken as an example. For the bandwidth occupied by the CPRI superframe with a line rate of 1.2288 Gbps, the amount of bandwidth occupied by the control plane (that is, the bandwidth occupied by the control word) is: 2 bytes * 8 bits * 256 (code Chip)*150 (superframe)*100(10ms)=61.44Mbps; the frame header of the Ethernet frame and the IPG occupy the IQ bandwidth (20 bytes per superframe), and the occupied bandwidth is: 20 bytes*8 Bit *150 (superframe) *100 (10ms) = 2.4Mbps; remove the frame header and IPG bandwidth of the control plane and Ethernet frame, the remaining IQ bandwidth is 1228.8M*(4/5)-61.44M-2.4M= 919.2Mbps. Therefore, in the above behavior example, the maximum antenna carrier mapping A*C number supported in the uplink direction is: 919.2M/[2 (double sampling)*2(IQ)*10 (data bit width)*256(chip)*150(super Frame) *100 (10ms)] = 5 (down to the entire value). Where A is the number of antennas and C is the number of carriers.

In the embodiment of the present invention, when the bandwidth compensation is implemented by the deletion control word, since the 20 Byte control word is deleted, the IQ data transmission is 20 Bytes larger, that is, the IQ bandwidth is increased: 20 bytes * 8 bits * 150 (super frame) * 100 (10ms) = 2.4Mbps. For the same behavior example above, the maximum number of A*Cs supported in the uplink direction is: (919.2M+2.4M)/[2 (double sampling)*2(IQ)*10 (data bit width)*256(chip)* 150 (Superframe) *100 (10ms)]=6 (downwardly rounded value), the maximum A*C number supported by the uplink and/or downlink directions can be increased by the bandwidth compensation method by deleting the control word. For the mobile communication carrier system, if 6 A*C numbers are needed to represent one carrier, or when a single network cable needs to carry more carrier data rates, the network deployment cost can be effectively reduced.

Further, please refer to FIG. 13 , which is a schematic flowchart of still another CPRI data transmission method according to an embodiment of the present invention. The method in the embodiment of the present invention may be specifically applied to a sending device. Specifically, the method may include The following steps:

S301: The sending device adds a frame header and an IPG to the CPRI frame to be transmitted, and obtains an Ethernet frame that can be transmitted on the physical layer of the Ethernet. The clock corresponding to the CPRI frame is the first clock.

S302: The sending device sends the Ethernet frame to the receiving device by using the Ethernet physical layer at a second clock, where the second clock is greater than the first clock.

In a specific embodiment, Ethernet-based CPRI data transmission can also be implemented by changing the working clock of the Ethernet physical layer chip. Specifically, the working clock corresponding to the CPRI frame is the first clock, that is, the sending device transmits the CPRI frame on the first clock, and the working clock corresponding to the Ethernet frame is the second clock, that is, the sending device can be in the The second clock transmits an Ethernet frame, and the second clock transmits an Ethernet frame, and the second clock is greater than the first clock.

Further, the sending device may further perform an Ethernet frame and a CPRI frame according to the clock domain transformation. A vacant byte between them determines the grouping of Ethernet frames for data transmission. Specifically, the sending device may calculate a frame length of the Ethernet frame according to a frame length of the CPRI frame, the first clock, and the second clock, and calculate a frame length and a length of the Ethernet frame. Determining a first difference of a frame length of the CPRI frame, and calculating a second difference between the first difference and a total length of the frame header and the IPG; determining, according to the second difference, Grouping of Ethernet frames during data transmission. And sending, by the sending device, the Ethernet frame to the receiving device by using the Ethernet physical layer, where the sending device is based on the packet, at the second clock, and through the Ethernet physical The layer transmits the Ethernet frame to the receiving device.

Specifically, when the first clock is smaller than the second clock, the difference between the length of the converted Ethernet frame and the length of the CPRI frame (ie, the first difference) is often greater than 20 bytes, that is, after the frame is deducted There is a spare byte (ie, the second difference) after the header and IPG 20 bytes. For example, when the first clock is 122.88MHz and the second clock is 125MHz, the difference between the length of the Ethernet frame and the length of the CPRI frame is deducted by 20 bytes. The remaining 121.333Byte. Therefore, considering the actual implementation, the Ethernet frame can also be grouped according to the vacant byte, and the transmitting device can transmit the Ethernet frame based on the packet.

Further, please refer to FIG. 14 , which is a schematic flowchart of another CPRI data transmission method according to an embodiment of the present invention. The method in the embodiment of the present invention may be specifically applied to a receiving device. Specifically, the method is The following steps can be included:

S401: The receiving device receives, at the second clock, an Ethernet frame sent by the sending device by using an Ethernet physical layer, where the Ethernet frame is that the sending device adds a frame header and an IPG to the CPRI frame that needs to be transmitted. In the frame transmitted by the Ethernet physical layer, the clock corresponding to the CPRI frame is the first clock, and the second clock is greater than the first clock.

S402: The receiving device removes the frame header of the Ethernet frame and the IPG to obtain the CPRI frame.

Specifically, the Ethernet-based CPRI data transmission can also be implemented by changing the working clock of the Ethernet physical layer chip. The working clock corresponding to the CPRI frame is a first clock, that is, the sending The device may transmit the CPRI frame on the first clock, and the working clock corresponding to the Ethernet frame is the second clock, that is, the sending device may send an Ethernet frame on the second clock, where the second clock is greater than the first clock. . The receiving device can receive the Ethernet frame sent by the sending device at the second clock.

In a specific embodiment, after receiving the Ethernet frame sent by the sending device through the Ethernet network cable, that is, the Ethernet physical layer, the receiving device can remove the frame header and the IPG of the Ethernet frame, and remove the vacant byte, thereby extracting The CPRI data is output, and the structure of the CPRI data is restored to the standard CPRI superframe structure before the transform clock domain, that is, the CPRI frame of the first clock is obtained.

Specifically, as shown in FIG. 9, the first clock corresponding to the CPRI frame in the transmitting device, that is, the CPRI data clock is 122.88 MHz, and the second clock corresponding to the Ethernet physical layer, that is, the Ethernet physical layer clock, is 125 MHz. The rate difference between the Ethernet GE port and the CPRI port is (125-122.88)*8=16.96Mbps. The length of a CPRI superframe is 8192 Bytes, and the length of the corresponding Ethernet physical layer frame, that is, the Ethernet frame is 8192 Byte*(125/122.88)=8333.333 Byte. The Ethernet frame corresponds to the CPRI superframe by 8333.333-8192. =141.333Byte (first difference), after deducting the 20Byte frame header and IPG length, there is still 121.333Byte free bytes (second difference). As shown in Figure 9, the transmitting device, that is, the transmitting end, adds a frame header, an IPG, and a spare byte (121.333 Byte) to the CPRI superframe to format the superframe (8192 Byte) of the CPRI data format to satisfy the Ethernet physics. The basic frame structure of the layer is converted into an Ethernet frame (8333.333 Byte), which is a basic frame transmitted by the Ethernet physical layer chip format, thereby realizing transmission of CPRI data through the Ethernet frame.

Further, in consideration of the actual implementation, the sending device may further determine the Ethernet according to the vacant number of bytes, that is, according to the difference between the length of the Ethernet frame and the CPRI superframe and the length of the frame header and the IPG. Grouping of frames. Specifically, according to the vacant number of bytes is 121.333 Byte, the transmitting device can treat each of the three Ethernet basic frames as a group, as shown in FIG. 10, the first Ethernet frame is spared 122 bytes, and the last two Ethernet frames are The spare space is 121 bytes, that is, among the three Ethernet frames of the packet, one length is 8334 bytes, and the other two lengths are 8333 bytes. The transmitting device can transmit an Ethernet frame including CPRI data to the receiving device based on the packet. The receiving device, that is, the receiving end receives the sending device and sends the sending After the Ethernet frame, the frame header and IPG of the Ethernet frame can be removed, and the spare byte is removed, and the CPRI data is extracted, and the structure of the CPRI data is restored to the standard CPRI superframe structure before the transformed clock domain.

In the embodiment of the present invention, the working clock of the Ethernet is controlled to be larger than the CPRI clock by the clock domain conversion, so that more data can be transmitted on the Ethernet network line in the same time, for example, the working frequency of the Ethernet physical layer is 125 MHz. The CPRI working clock takes 122.88MHz. For a superframe (Ethernet basic frame), 141.333 bytes of data can be transmitted, except for the frame header and the IPG, which has a total of 20 bytes and 121.333 bytes remaining, thereby realizing the transformation of the Ethernet physical layer chip. The working clock compensates the bandwidth of the CPRI frame, and no longer squeezes the IQ data space. It does not need to sacrifice the IQ bandwidth to implement GE-based CPRI data transmission, which improves the CPRI data transmission efficiency.

15 is a schematic structural diagram of another sending device according to an embodiment of the present invention. The sending device includes: a receiver 300, a transmitter 400, a memory 200, and a processor 100. The memory 200 may be a high speed RAM memory or a non-volatile memory such as at least one disk memory. A corresponding application or the like is stored in the memory 200 as a computer storage medium. The receiver 300, the transmitter 400, the memory 200, and the processor 100 may be connected to each other through a bus, or may be connected by other means. In the present embodiment, a bus connection will be described.

The processor 100 performs the following steps:

Based on the transmitter 400, and transmitting the Ethernet frame to the receiving device through the Ethernet physical layer.

Specifically, the CPRI frame that needs to be transmitted is a superframe in the CPRI protocol. The preset number, that is, the number of deleted control words, may be a fixed number configured in advance, may also be a number determined according to a current line rate of the CPRI frame, and the like.

Optionally, the processor 100 presets a number of CPRI frames that need to be transmitted in the deletion. Control words, perform the following steps:

Obtain the current line rate corresponding to the CPRI frame to be transmitted;

Specifically, the CPRI frame, that is, the superframe in the CPRI protocol, includes control words that define different uses, such as synchronous timing, slow control and management, factory customization, and the like, and some reserved control words. Optionally, the deleted control word is a custom control word or a reserved control word in the CPRI frame that needs to be transmitted.

Further, please refer to FIG. 16 , which is a schematic structural diagram of still another sending device according to an embodiment of the present invention. The sending device includes: a receiver 700, a transmitter 800, a memory 600, and a processor 500. The memory 600 may be a high speed RAM memory or a non-volatile memory such as at least one disk memory. A corresponding application or the like is stored in the memory 600 as a computer storage medium. The receiver 700, the transmitter 800, the memory 600, and the processor 500 may be connected to each other through a bus, or may be connected by other means. In the present embodiment, a bus connection will be described.

The processor 500 performs the following steps:

Based on the transmitter 800, the Ethernet frame is transmitted to the receiving device at the second clock and through the Ethernet physical layer, wherein the second clock is greater than the first clock.

Optionally, the processor 500 is further configured to perform the following steps:

Calculating a first difference between a frame length of the Ethernet frame and a frame length of the CPRI frame, and calculating a second difference between the first difference and a total length of the frame header and the IPG ;

The processor 500 performs the following steps in the second clock and sending the Ethernet frame to the receiving device through the Ethernet physical layer:

Optionally, the first clock is 122.88 MHz, and the second clock is 125 MHz.

Referring to FIG. 17, which is a schematic structural diagram of a receiving device according to an embodiment of the present invention, the receiving device includes: a receiver 1100, a transmitter 1200, a memory 1000, and a processor 900, where the memory 1000 may be a high speed RAM memory or a non-volatile memory such as at least one disk memory. A corresponding application or the like is stored in the memory 1000 as a computer storage medium. The receiver 1100, the transmitter 1200, the memory 1000, and the processor 900 may be connected to each other through a bus, or may be connected by other means. In the present embodiment, a bus connection will be described.

The processor 900 performs the following steps:

Receiving, according to the receiver 1100, an Ethernet frame sent by the sending device by using an Ethernet physical layer, where the Ethernet frame is a preset number of control words in the CPRI frame that the transmitting device deletes and needs to be transmitted, and is deleted control The CPRI frame after the word is added with a frame header and an IPG, and the obtained frame can be transmitted on the Ethernet physical layer;

Further, please refer to FIG. 18, which is a schematic structural diagram of still another receiving device according to an embodiment of the present invention. The receiving device includes: a receiver 1500, a transmitter 1600, a memory 1400, and a processor 1300. The memory 1400 may be a high speed RAM memory or a non-volatile memory such as at least one disk memory. A corresponding application or the like is stored in the memory 1400 as a computer storage medium. The data connection between the receiver 1500, the transmitter 1600, the memory 1400, and the processor 1300 may be performed through a bus, or may be connected by other means. In the present embodiment, a bus connection will be described.

The processor 1300 performs the following steps:

Receiving, according to the receiver 1500, an Ethernet frame sent by the sending device at a second clock and through an Ethernet physical layer, where the Ethernet frame is that the sending device adds a frame header and an IPG to a CPRI frame that needs to be transmitted, Obtaining a frame that can be transmitted on the Ethernet physical layer, the clock corresponding to the CPRI frame is a first clock, and the second clock is greater than the first clock;

Specifically, the Ethernet-based CPRI data transmission can also be implemented by changing the working clock of the Ethernet physical layer chip. The working clock corresponding to the CPRI frame is the first clock, that is, the sending device can transmit the CPRI frame on the first clock, and the working clock corresponding to the Ethernet frame is the second clock, that is, the sending device can be in the The second clock transmits an Ethernet frame, and the second clock is greater than the first clock. The receiving device may receive the Ethernet frame sent by the sending device at the second clock, and after receiving the Ethernet frame, remove the frame header and the IPG of the Ethernet frame, extract the CPRI data, and restore the transform to a transform. Standard CPRI superframe structure before the clock domain.

Further, please refer to FIG. 19, which is a schematic structural diagram of a CPRI data transmission system according to an embodiment of the present invention. Specifically, the system in the embodiment of the present invention includes: a sending device 1 and a receiving device 2, where

The sending device 1 is configured to delete a preset number of control words in a CPRI frame of a public radio interface that needs to be transmitted, and add a frame header and a frame gap IPG to the CPRI frame after deleting the control word, so as to be transmitted in the physical layer of the Ethernet. An Ethernet frame; the Ethernet frame is sent to the receiving device 2 by the Ethernet physical layer;

The receiving device 2 is configured to receive, by using the Ethernet physical layer, an Ethernet frame sent by the sending device 1; removing the frame header of the Ethernet frame and the IPG, to obtain a CPRI frame to be restored; And deleting the preset number of control words in the to-be-recovered CPRI frame, and restoring the to-be-recovered CPRI frame to a CPRI frame before deleting the control word.

Specifically, the CPRI frame that needs to be transmitted is a superframe in the CPRI protocol, and the superframe can be used as a basic frame for Ethernet data transmission.

Further, please refer to FIG. 20, which is a schematic structural diagram of another CPRI data transmission system according to an embodiment of the present invention. Specifically, the system in the embodiment of the present invention includes: a sending device 1 and a receiving device 2, where

The sending device 1 is configured to add a frame header and an IPG to the CPRI frame that needs to be transmitted, and obtain an Ethernet frame that can be transmitted on the physical layer of the Ethernet, where the clock corresponding to the CPRI frame is the first clock; Transmitting, by the Ethernet physical layer, the Ethernet frame to the receiving device 2, where the second clock is greater than the first clock;

The receiving device 2 is configured to receive, by the second clock, the Ethernet frame sent by the sending device 1 by using the Ethernet physical layer; removing the frame header and the IPG of the Ethernet frame, The CPRI frame is obtained.

Further, the sending device may further calculate a frame length of the Ethernet frame according to a frame length of the CPRI frame, the first clock, and the second clock, and calculate a frame length of the Ethernet frame. a first difference from a frame length of the CPRI frame, and calculating a second difference between the first difference and a total length of the frame header and the IPG; according to the second difference, Determine the grouping of Ethernet frames for data transmission. Thereby the transmitting device can transmit the Ethernet frame to the receiving device at the second clock and over the Ethernet physical layer based on the packet.

In the embodiment of the present invention, the working clock of the Ethernet is controlled to be larger than the CPRI clock by clock domain conversion, so that more data can be transmitted on the Ethernet network line in the same time, for example, an Ethernet object. The working clock of the layer is 125MHz, and the working clock of CPRI is 122.88MHz. For a superframe (Ethernet basic frame), 141.333 bytes of data can be transmitted, except for the frame header and IPG, which has a total of 20 bytes and 121.333Byte remaining. Transforming the working clock of the Ethernet physical layer chip to compensate the bandwidth of the CPRI frame, and no longer crowding the IQ data space, without sacrificing the IQ bandwidth to implement GE-based CPRI data transmission, and improving the CPRI data transmission efficiency.

In the above embodiments, the descriptions of the various embodiments are different, and the details that are not detailed in a certain embodiment can be referred to the related descriptions of other embodiments.

In the several embodiments provided by the present invention, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.

The units described as separate components may or may not be physically separated, and the components displayed as the unit may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. . Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of hardware plus software functional units.

The above-described integrated unit implemented in the form of a software functional unit can be stored in a computer readable storage medium. The above software functional unit is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor to perform the methods of the various embodiments of the present invention. Part of the steps. The foregoing storage medium includes: a USB flash drive, a mobile hard disk, a read-only memory (ROM), and a random A variety of media that can store program code, such as a random access memory (RAM), a disk, or an optical disk.

A person skilled in the art can clearly understand that for the convenience and brevity of the description, only the division of each functional module described above is exemplified. In practical applications, the above function assignment can be completed by different functional modules as needed, that is, the device is installed. The internal structure is divided into different functional modules to perform all or part of the functions described above. For the specific working process of the device described above, refer to the corresponding process in the foregoing method embodiment, and details are not described herein again.

Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that The technical solutions described in the foregoing embodiments may be modified, or some or all of the technical features may be equivalently replaced; and the modifications or substitutions do not deviate from the technical solutions of the embodiments of the present invention. range.

Claims

A transmitting device, comprising:

a deleting module, configured to delete a preset number of control words in a CPRI frame of a public wireless interface that needs to be transmitted;

a format conversion module, configured to add a frame header and a frame gap IPG to the CPRI frame after the deletion of the control word by the deleting module, to obtain an Ethernet frame that can be transmitted in the physical layer of the Ethernet;

And a sending module, configured to send the Ethernet frame to the receiving device by using the Ethernet physical layer.
The transmitting device according to claim 1, wherein the deleting module comprises:

An acquiring unit, configured to acquire a current line rate corresponding to a CPRI frame that needs to be transmitted;

a number determining unit, configured to determine, according to the current line rate acquired by the acquiring unit, the number of control words that need to be deleted in the CPRI frame that needs to be transmitted, where the number of control words that need to be deleted The total length is not less than the sum of the total length of the frame header and the IPG;

And a data deleting unit, configured to delete the number of control words determined by the number determining unit in the CPRI frame that needs to be transmitted.
The transmitting device according to claim 1 or 2, wherein the deleted control word is a custom control word or a reserved control word in the CPRI frame to be transmitted.
A transmitting device, comprising:

a format conversion module, configured to add a frame header and a frame gap IPG to a common public radio interface CPRI frame to be transmitted, to obtain an Ethernet frame that can be transmitted on an Ethernet physical layer, where the clock corresponding to the CPRI frame is a first clock;

And a sending module, configured to send the Ethernet frame to the receiving device by using the Ethernet physical layer at a second clock, where the second clock is greater than the first clock.
The transmitting device according to claim 4, wherein the transmitting device further comprises:

a calculation module, configured to calculate, according to a frame length of the CPRI frame, the first clock, and the second clock, a frame length of the Ethernet frame;

The calculating module is further configured to calculate a first difference between a frame length of the Ethernet frame and a frame length of the CPRI frame, and calculate the first difference and the total of the frame header and the IPG. a second difference in the sum of the lengths;

a packet determining module, configured to determine, according to the second difference value calculated by the calculating module, a packet of an Ethernet frame when performing data transmission;

The sending module is specifically configured to:

Based on the packet, the Ethernet frame is transmitted to the receiving device at the second clock and through the Ethernet physical layer.
The transmitting device according to claim 4 or 5, wherein the first clock is 122.88 MHz and the second clock is 125 MHz.
A receiving device, comprising:

a receiving module, configured to receive, by using an Ethernet physical layer, an Ethernet frame sent by the sending device, where the Ethernet frame is a preset number of control words in the CPRI frame of the universal public wireless interface that the transmitting device needs to be deleted, and is deleted The CPRI frame after the control word is increased by the frame header and the frame gap IPG, and the obtained frame can be transmitted on the Ethernet physical layer;

a recovery module, configured to remove the frame header of the Ethernet frame and the IPG, to obtain a CPRI frame to be restored;

The recovery module is further configured to recover the preset number of control words deleted from the to-be-recovered CPRI frame, and restore the to-be-recovered CPRI frame to a CPRI frame before deleting the control word.
The receiving device according to claim 7, wherein the preset number is determined according to a corresponding current line rate of a CPRI frame that needs to be transmitted, and the preset number of deletions is determined. The total length of the control word is not less than the sum of the total length of the frame header and the IPG.
The receiving device according to claim 7 or 8, wherein the deleted control word is a custom control word or a reserved control word in the CPRI frame to be transmitted.
A receiving device, comprising:

a receiving module, configured to receive, by the second clock, an Ethernet frame sent by the sending device by using an Ethernet physical layer, where the Ethernet frame is that the sending device adds a frame header to a common public wireless interface CPRI frame that needs to be transmitted. a frame gap IPG, a frame that can be transmitted on the Ethernet physical layer, the clock corresponding to the CPRI frame is a first clock, and the second clock is greater than the first clock;

And a recovery module, configured to remove the frame header of the Ethernet frame and the IPG, to obtain the CPRI frame.
The receiving device according to claim 10, wherein the first clock is 122.88 MHz and the second clock is 125 MHz.
A general public radio interface CPRI data transmission method, comprising:

The sending device deletes a preset number of control words in the CPRI frame of the public radio interface to be transmitted;

The sending device adds a frame header and a frame gap IPG to the CPRI frame after deleting the control word, and obtains an Ethernet frame that can be transmitted on the Ethernet physical layer;

The transmitting device sends the Ethernet frame to the receiving device by using the Ethernet physical layer.
The method according to claim 12, wherein the sending device deletes a preset number of control words in the CPRI frame to be transmitted, including:

The sending device acquires a current line rate corresponding to the CPRI frame that needs to be transmitted;

The sending device determines, according to the current line rate, the number of control words that need to be deleted in the CPRI frame that needs to be transmitted, where the total length of the number of control words that need to be deleted is not Less than the sum of the total length of the frame header and the IPG;

The transmitting device deletes the number of control words in the CPRI frame that needs to be transmitted.
The method according to claim 12 or 13, wherein the deleted control word is a custom control word or a reserved control word in the CPRI frame to be transmitted.
A general public radio interface CPRI data transmission method, comprising:

The sending device adds a frame header and a frame gap IPG to the CPRI frame to be transmitted, and obtains an Ethernet frame that can be transmitted on the physical layer of the Ethernet, where the clock corresponding to the CPRI frame is the first clock;

The sending device sends the Ethernet frame to the receiving device by using the Ethernet physical layer at a second clock, where the second clock is greater than the first clock.
The method of claim 15 wherein the method further comprises:

Transmitting, by the sending device, a frame length of the Ethernet frame according to a frame length of the CPRI frame, the first clock, and the second clock;

The sending device calculates a first difference between a frame length of the Ethernet frame and a frame length of the CPRI frame, and calculates a sum of the first difference value and a total length of the frame header and the IPG. Second difference

The sending device determines, according to the second difference, a packet of an Ethernet frame when performing data transmission;

Sending, by the sending device, the Ethernet frame to the receiving device by using the Ethernet physical layer on the second clock, including:

The transmitting device transmits the Ethernet frame to the receiving device at the second clock and through the Ethernet physical layer based on the packet.
The method according to claim 15 or 16, wherein the first clock is 122.88 MHz and the second clock is 125 MHz.
A general public radio interface CPRI data transmission method, comprising:

The receiving device receives, by the Ethernet physical layer, an Ethernet frame sent by the sending device, where the Ethernet frame is a preset number of control words in the CPRI frame that the transmitting device deletes and needs to be transmitted, and is added to the CPRI frame after deleting the control word. Frame header and frame gap IPG, obtained frames that can be transmitted on the Ethernet physical layer;

Receiving, by the receiving device, the frame header of the Ethernet frame and the IPG, to obtain a CPRI frame to be restored;

And the receiving device recovers the preset number of control words deleted from the to-be-recovered CPRI frame, and restores the to-be-recovered CPRI frame to a CPRI frame before deleting the control word.
The method according to claim 18, wherein the preset number is determined according to a corresponding current line rate of a CPRI frame that needs to be transmitted, and the total length of the deleted preset number of control words is not It is smaller than the sum of the total length of the frame header and the IPG.
The method according to claim 18 or 19, wherein the deleted control word is a custom control word or a reserved control word in the CPRI frame to be transmitted.
A general public radio interface CPRI data transmission method, comprising:

The receiving device receives the Ethernet frame sent by the sending device at the second clock and through the Ethernet physical layer, where the Ethernet frame is the sending device adds a frame header and a frame gap IPG to the CPRI frame to be transmitted, and the obtained device can obtain the energy of the frame and the frame gap IPG. a clock transmitted by the physical layer of the Ethernet, the clock corresponding to the CPRI frame is a first clock, and the second clock is greater than the first clock;

The receiving device removes the frame header of the Ethernet frame and the IPG to obtain the CPRI frame.
The method of claim 21 wherein said first clock is 122.88 MHz and said second clock is 125 MHz.
A computer storage medium, characterized in that the computer storage medium stores a program, The program execution comprises the method steps of any of claims 12-14.
A computer storage medium, characterized in that the computer storage medium stores a program, the program being executed comprising the method steps of any one of claims 15-17.
A computer storage medium, characterized in that the computer storage medium stores a program, the program being executed comprising the method steps of any one of claims 18-20.
A computer storage medium, characterized in that said computer storage medium stores a program, said program being executed comprising the method steps of any one of claims 21-22.
A transmitting device, comprising: a transmitter, a receiver, a memory, and a processor,

Wherein the processor performs the following steps:

Deleting a preset number of control words in the CPRI frame of the public radio interface to be transmitted;

Adding a frame header and a frame gap IPG to the CPRI frame after deleting the control word, and obtaining an Ethernet frame that can be transmitted on the Ethernet physical layer;

Based on the transmitter, and transmitting the Ethernet frame to a receiving device through the Ethernet physical layer.
The transmitting device according to claim 27, wherein the processor presets a number of control words in a CPRI frame that needs to be transmitted by performing the deletion, and specifically performs the following steps:

Obtain the current line rate corresponding to the CPRI frame to be transmitted;

Determining, according to the current line rate, the number of control words that need to be deleted in the CPRI frame that needs to be transmitted, where the total length of the number of control words that need to be deleted is not less than the frame header and the The sum of the total lengths of the IPGs;

Deleting the number of control words in the CPRI frame that needs to be transmitted.
The transmitting device according to claim 27 or 28, wherein the deleted control word is a custom control word or a reserved control word in the CPRI frame to be transmitted.
A transmitting device, comprising: a transmitter, a receiver, a memory, and a processor,

Wherein the processor performs the following steps:

Adding a frame header and a frame gap IPG to the common public radio interface CPRI frame to be transmitted, and obtaining an Ethernet frame that can be transmitted on the physical layer of the Ethernet, where the clock corresponding to the CPRI frame is the first clock;

And transmitting, according to the transmitter, the Ethernet frame to the receiving device at the second clock and through the Ethernet physical layer, wherein the second clock is greater than the first clock.
The transmitting device according to claim 30, wherein the processor is further configured to perform the following steps:

Calculating a frame length of the Ethernet frame according to a frame length of the CPRI frame, the first clock, and the second clock;

Calculating a first difference between a frame length of the Ethernet frame and a frame length of the CPRI frame, and calculating a second difference between the first difference and a total length of the frame header and the IPG ;

Determining, according to the second difference, a packet of an Ethernet frame when performing data transmission;

The processor is configured to send the Ethernet frame to the receiving device by using the Ethernet physical layer, and perform the following steps:

Based on the packet, the Ethernet frame is transmitted to the receiving device at the second clock and through the Ethernet physical layer.
The transmitting device according to claim 30 or 31, wherein the first clock is 122.88 MHz and the second clock is 125 MHz.
A receiving device, comprising: a transmitter, a receiver, a memory, and a processor,

Wherein the processor performs the following steps:

Receiving, according to the receiver, an Ethernet frame sent by the sending device by using an Ethernet physical layer, where the Ethernet frame is a preset number of control words in the CPRI frame of the universal public radio interface that the transmitting device needs to transmit, and Adding a frame header and a frame gap IPG to the CPRI frame after deleting the control word, and obtaining a frame that can be transmitted on the Ethernet physical layer;

Removing the frame header of the Ethernet frame and the IPG, to obtain a CPRI frame to be restored;

And recovering the preset number of control words from the to-be-recovered CPRI frame, and restoring the to-be-recovered CPRI frame to a CPRI frame before deleting the control word.
The receiving device according to claim 33, wherein the preset number is determined according to a corresponding current line rate of a CPRI frame that needs to be transmitted, and the total length of the preset number of control words deleted is Not less than the sum of the total length of the frame header and the IPG.
The receiving device according to claim 33 or 34, wherein the deleted control word is a custom control word or a reserved control word in the CPRI frame to be transmitted.
A receiving device, comprising: a transmitter, a receiver, a memory, and a processor,

Wherein the processor performs the following steps:

Receiving, according to the receiver, an Ethernet frame sent by the sending device at a second clock and through an Ethernet physical layer, wherein the Ethernet frame is a sending frame header of the common public wireless interface CPRI frame that needs to be transmitted by the sending device a frame gap IPG, the frame that can be transmitted on the Ethernet physical layer, the clock corresponding to the CPRI frame is a first clock, and the second clock is greater than the first clock;

The frame header of the Ethernet frame and the IPG are removed to obtain the CPRI frame.
The receiving device according to claim 36, wherein said first clock is 122.88 MHz and said second clock is 125 MHz.
A general public radio interface CPRI data transmission system, comprising: a transmitting device and a receiving device, wherein

The sending device is configured to delete a preset number of control words in a CPRI frame of a public radio interface that needs to be transmitted; add a frame header and a frame gap IPG to the CPRI frame after deleting the control word, and obtain an ether that can be transmitted in the physical layer of the Ethernet. a network frame; sending, by the Ethernet physical layer, the Ethernet frame to the receiving device;

The receiving device is configured to receive, by the Ethernet physical layer, an Ethernet frame sent by the sending device, remove the frame header of the Ethernet frame, and the IPG, to obtain a CPRI frame to be restored; And deleting the preset number of control words in the CPRI frame to be restored, and restoring the to-be-recovered CPRI frame to a CPRI frame before deleting the control word.
A general public radio interface CPRI data transmission system, comprising: a transmitting device and a receiving device, wherein

The sending device is configured to add a frame header and a frame gap IPG to the CPRI frame that needs to be transmitted, to obtain an Ethernet frame that can be transmitted on the Ethernet physical layer, where the clock corresponding to the CPRI frame is the first clock; And sending, by the Ethernet physical layer, the Ethernet frame to the receiving device, where the second clock is greater than the first clock;

The receiving device is configured to receive, by the second clock, an Ethernet frame sent by the sending device by using the Ethernet physical layer; removing the frame header of the Ethernet frame and the IPG, and obtaining the Said CPRI frame.