CN111835748A - Data conversion method and device between CPRI interface and eCPRI interface - Google Patents

Data conversion method and device between CPRI interface and eCPRI interface Download PDF

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Publication number
CN111835748A
CN111835748A CN202010645941.6A CN202010645941A CN111835748A CN 111835748 A CN111835748 A CN 111835748A CN 202010645941 A CN202010645941 A CN 202010645941A CN 111835748 A CN111835748 A CN 111835748A
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data
cpri
ecpri
frame
interface
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谭红伟
孙联超
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Wuhan Hongxin Technology Development Co Ltd
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Wuhan Hongxin Telecommunication Technologies Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/06—Notations for structuring of protocol data, e.g. abstract syntax notation one [ASN.1]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/08—Protocols for interworking; Protocol conversion
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/22—Parsing or analysis of headers

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  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

The embodiment of the invention provides a data conversion method and a data conversion device between a CPRI interface and an eCPRI interface. The method comprises the following steps: performing CPRI deframing on CPRI frame data acquired from a CPRI interface to acquire a CPRI frame header, first IQ data and first OAM data; and acquiring an eCPRI frame header according to the CPRI frame header, encapsulating the eCPRI frame header, the first IQ data and the first OAM data into eCPRI frame data according to an eCPRI frame structure, and sending the eCPRI frame data to an eCPRI interface. The data conversion method and device between the CPRI interface and the eCPRI interface provided by the embodiment of the invention can realize the data conversion between the eCPRI interface and the CPRI interface, can enable 4G equipment to compatibly transmit 5G signals without modifying hardware equipment, can upgrade a 4G network to the 5G network without re-wiring construction, and can greatly reduce the construction cost of the 5G network.

Description

Data conversion method and device between CPRI interface and eCPRI interface
Technical Field
The present invention relates to the field of computer technologies, and in particular, to a method and an apparatus for data conversion between a CPRI interface and an eccri interface.
Background
The CPRI interface (common public radio interface) is a key communication interface between REC (radio equipment control) and RE (radio equipment) in cellular wireless networks. The optical fiber transmission is adopted, so that the optical fiber remote transmission system has the advantages of low construction cost, flexible networking, long remote distance, wide coverage range and the like, and is widely used for data transmission between a Base Band Unit (BBU) and a Radio Remote Unit (RRU) of 3G/4G base station equipment. With the arrival of the 5G era, due to the great increase of the carrier bandwidth and the number of antennas, the data traffic transmitted between the BBU and the RRU increases sharply, and meanwhile, the high-speed optical module has high cost, so that the traditional CPRI interface cannot meet the requirement of 5G large-capacity data transmission. In order to alleviate the pressure of 5G forwarding, an eccri interface capable of greatly reducing the forwarding bandwidth is presented. Because data transmitted on a communication protocol stack can be gradually increased layer by layer, the data transmission quantity of the data is larger when the data is closer to a physical layer, an eCPRI interface moves the data processed on the BBU by one layer (BBU processing by High Phy upwards), the data processed on the BBU is reserved for RRU processing (RRU processing by Low Phy downwards), and the data transmission quantity between the BBU and the RRU is greatly reduced. Because the eCPRI interface is based on the Ethernet protocol, multipoint-to-multipoint data transmission can be supported through the switch, all BBU and RRU equipment only need to be accessed to the local switch, and all RRUs do not need to pull the optical fiber to a BBU machine room, thereby greatly saving the resources of the optical fiber and reducing the construction difficulty. Therefore, under the requirement of forward transmission with high bandwidth, 5G, large capacity, the eCPRI interface is replaced by the eCPRI interface and is widely applied.
In the current 5G network construction, the 5G equipment cost is high, so that the investment of an operator in an earlier period is huge, and the current 5G application ecology is still in a growth period, in the 5G network construction process, the operator can give priority to a scheme of realizing 5G network coverage by upgrading and transforming part of 4G equipment and a machine room, especially in an indoor application scene, the transmission bandwidth lower than 100M can be selected for 5G network coverage, and part of 4G equipment can directly realize 5G network coverage by upgrading. However, in the process of upgrading a 4G device to a 5G device, the CPRI interface is used as the forwarding interface of the original 4G device, and the eccri interface is generally used in the 5G device. Because the transmission protocols are different between the two, the data processing clocks are also different, the frame structure of the CPRI interface adopts a three-level nested structure with a base frame frequency of 3.84M, and the data processing clock is 122.88M; the frame structure of the eCPRI interface adopts the frame structure of Ethernet, and the data processing clock is 125M. Upgrading the CPRI interface to the eccri interface without changing the hardware clock is a problem to be solved in the art.
Disclosure of Invention
The embodiment of the invention provides a data conversion method and a data conversion device between a CPRI interface and an eCPRI interface, which are used for solving or at least partially solving the defect that the data conversion between the CPRI interface and the eCPRI interface is difficult to realize in the prior art.
In a first aspect, an embodiment of the present invention provides a method for converting data between a CPRI interface and an eccri interface, where the method includes:
performing CPRI deframing on CPRI frame data acquired from a CPRI interface to acquire a CPRI frame header, first IQ data and first OAM data;
and acquiring an eCPRI frame header according to the CPRI frame header, encapsulating the eCPRI frame header, the first IQ data and the first OAM data into eCPRI frame data according to an eCPRI frame structure, and sending the eCPRI frame data to an eCPRI interface.
Preferably, the data conversion method between the CPRI interface and the eccri interface further includes:
performing eCPRI deframing on eCPRI frame data acquired from an eCPRI interface to acquire an eCPRI frame header, second IQ data and second OAM data;
and acquiring a CPRI frame header according to the eCPRI frame header, and encapsulating the CPRI frame header, the second IQ data and the second OAM data into CPRI frame data according to a CPRI frame structure and sending the CPRI frame data to a CPRI interface.
Preferably, the specific steps of performing CPRI deframing on the CPRI frame data acquired from the CPRI interface to acquire a CPRI frame header, first IQ data, and first OAM data include:
generating a data processing clock of the eCPRI frame data according to the CPRI frame data;
acquiring the CPRI frame header from the CPRI frame data through CPRI frame synchronization;
generating a first read enable signal of the first IQ data and a first read enable signal of the first OAM data according to the CPRI frame header based on a data processing clock of the eCPRI frame data;
based on the data processing clock of the eCPRI frame data, acquiring the first IQ data from the CPRI frame data according to a first read enable signal of the first IQ data, and acquiring the first OAM data from the CPRI frame data according to the first read enable signal of the first OAM data.
Preferably, the specific steps of obtaining an eccri frame header according to the CPRI frame header, encapsulating the eccri frame header, the first IQ data, and the first OAM data into an eccri frame data according to an eccri frame structure, and sending the eccri frame data to an eccri interface include:
performing cross-clock domain conversion on the CPRI frame header based on a data processing clock of the eCPPRI frame data to acquire the eCPPRI frame header, and generating a second read enable signal of the first IQ data and a second read enable signal of the first OAM data according to the CPRI frame header;
based on the data processing clock of the eCPRI frame data, according to the second read enable signal of the first IQ data and the second read enable signal of the first OAM data, the eCPRI frame header, the first IQ data and the first OAM data are encapsulated into eCPRI frame data according to an eCPRI frame structure and sent to the eCPRI interface.
Preferably, the specific steps of performing the eccri deframing on the eccri frame data acquired from the eccri interface to acquire the eccri frame header, the second IQ data, and the second OAM data include:
generating a data processing clock of the CPRI frame data according to the eCPRI frame data;
acquiring an eCPRI frame header from eCPRI frame data through eCPRI frame synchronization;
generating a first read enable signal of the second IQ data and a first read enable signal of the second OAM data according to the CPRI frame header based on a data processing clock of the CPRI frame data;
and acquiring the second IQ data from the eCPRI frame data according to a first read enable signal of the second IQ data based on the data processing clock of the CPRI frame data, and acquiring the second OAM data from the eCPRI frame data according to the first read enable signal of the second OAM data.
Preferably, the specific steps of obtaining a CPRI frame header according to the eccri frame header, encapsulating the CPRI frame header, the second IQ data, and the second OAM data into CPRI frame data according to a CPRI frame structure, and sending the CPRI frame data to a CPRI interface include:
performing cross-clock domain conversion on the eCPPRI frame header based on the data processing clock of the CPRI frame data to acquire the CPRI frame header, and generating a second read enable signal of the second IQ data and a second read enable signal of the second OAM data according to the eCPPRI frame header;
and based on the data processing clock of the CPRI frame data, according to the second read enable signal of the second IQ data and the second read enable signal of the second OAM data, encapsulating the CPRI frame header, the second IQ data, and the second OAM data into CPRI frame data according to a frame structure of CPRI, and sending the CPRI frame data to the CPRI interface.
In a second aspect, an embodiment of the present invention provides a data conversion device between a CPRI interface and an eccri interface, including:
the CPRI de-framing module is used for performing CPRI de-framing on CPRI frame data acquired from the CPRI interface to acquire a CPRI frame header, first IQ data and first OAM data;
an eCPRI framing module, configured to obtain an eCPRI frame header according to the CPRI frame header, encapsulate the eCPRI frame header, the first IQ data, and the first OAM data into eCPRI frame data according to an eCPRI frame structure, and send the eCPRI frame data to an eCPRI interface.
Preferably, the data conversion device between the CPRI interface and the eccri interface further includes:
the eCPRI de-framing module is used for performing CPRI de-framing on eCPRI frame data acquired from the eCPRI interface to acquire an eCPRI frame header, second IQ data and second OAM data;
and the CPRI framing module is used for acquiring a CPRI frame header according to the eCPRI frame header, and encapsulating the CPRI frame header, the second IQ data and the second OAM data into CPRI frame data according to a CPRI frame structure and sending the CPRI frame data to a CPRI interface.
In a third aspect, an embodiment of the present invention provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, where the program is executed to implement a method for converting data between a CPRI interface and an eCPRI interface according to any one of various possible implementation manners of the first aspect.
In a fourth aspect, an embodiment of the present invention provides a non-transitory computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of the method for converting data between a CPRI interface and an eccri interface according to any one of the various possible implementations of the first aspect.
The data conversion method and device between the CPRI interface and the eCPRI interface provided by the embodiment of the invention can realize the data conversion between the eCPRI interface and the CPRI interface, can enable 4G equipment to compatibly transmit 5G signals without modifying hardware equipment, can upgrade a 4G network to the 5G network without re-wiring construction, and can greatly reduce the construction cost of the 5G network.
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 description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 is a schematic flowchart of a data conversion method between a CPRI interface and an eccri interface according to an embodiment of the present invention;
fig. 2 is a schematic flowchart of a data conversion method between a CPRI interface and an eccri interface according to an embodiment of the present invention;
fig. 3 is a schematic flowchart of a data conversion method between a CPRI interface and an eccri interface according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a data conversion apparatus between a CPRI interface and an eccri interface according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a data conversion apparatus between a CPRI interface and an eccri interface according to an embodiment of the present invention;
fig. 6 is a schematic physical structure diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to overcome the above problems in the prior art, embodiments of the present invention provide a method and an apparatus for data conversion between a CPRI interface and an eccri interface, and the inventive concept is to implement data conversion transmission between the CPRI interface and the eccri interface without replacing hardware devices or performing wiring construction again, so that 4G devices can transmit 5G signals in a compatible manner, and the construction cost of a 5G network is greatly reduced.
Fig. 1 is a schematic flow chart of a data conversion method between a CPRI interface and an eccri interface according to an embodiment of the present invention. As shown in fig. 1, the method includes: step S101, performing CPRI deframing on CPRI frame data acquired from a CPRI interface, and acquiring a CPRI frame header, first IQ data and first OAM data.
It should be noted that the embodiment of the present invention implements conversion of CPRI frame data into eccri frame data.
Specifically, after receiving the CPRI frame data through the CPRI interface, performing CPRI deframing on the CPRI frame data.
The CPRI frame decoding mainly performs CPRI frame synchronization and CPRI data separation.
The CPRI frame header can be acquired through CPRI frame synchronization. And the CPRI frame header is used for generating a subsequent eCPRI frame header and forming an eCPRI frame.
Through CPRI data separation, separating out first IQ data and first OAM data from CPRI frame data, respectively entering IQ data buffer and OAM data buffer, waiting to be read, and performing eCPRI framing.
Step S102, an eCPRI frame header is obtained according to the CPRI frame header, the eCPRI frame header, the first IQ data and the first OAM data are encapsulated into eCPRI frame data according to an eCPRI frame structure and are sent to an eCPRI interface.
Specifically, the data processing clock of the CPRI frame data is 122.88M, the data processing clock of the eccri frame data is 125M, and the CPRI frame header is subjected to clock conversion to obtain the eccri frame header.
According to the positions of IQ data and OAM data in an eCPRI frame structure, reading first IQ data and first OAM data from an IQ data cache buffer and an OAM data cache buffer respectively, framing an eCPRI frame header, the first IQ data and the first OAM data according to the eCPRI frame structure, packaging the eCPRI frame data and sending the eCPRI frame data to an eCPRI interface.
The embodiment of the invention performs CPRI de-framing on CPRI frame data acquired from a CPRI interface to acquire a CPRI frame header, first IQ data and first OAM data, acquires an eCPRI frame header according to the CPRI frame header, encapsulates the eCPRI frame header, the first IQ data and the first OAM data into eCPRI frame data according to the frame structure of eCPRI, and transmits the eCPRI frame data to the eCPPRI interface, thereby realizing data conversion between the CPRI interface and the eCPPRI interface, enabling 4G equipment to compatibly transmit 5G signals without modifying hardware equipment, upgrading the 4G network to the 5G network without re-wiring construction, and greatly reducing the construction cost of the 5G network. Furthermore, the method is simpler, easier to operate, easier to popularize in various application scenes and higher in universality.
Based on the content of the foregoing embodiments, the method for converting data between the CPRI interface and the eccri interface further includes: and performing eCPRI de-framing on eCPRI frame data acquired from the eCPRI interface to acquire an eCPRI frame header, second IQ data and second OAM data.
It should be noted that, the embodiment of the present invention implements conversion of the eccri frame data into the CPRI frame data.
Specifically, after receiving the eccri frame data through the eccri interface, the eccri frame data is subjected to eccri deframing.
The eCPRI de-framing mainly performs eCPRI frame synchronization and eCPRI data separation.
The eCPRI frame header can be obtained through eCPRI frame synchronization. And the eCPRI frame header is used for generating a subsequent CPRI frame header and framing the CPRI frame.
Separating second IQ data and second OAM data from the eCPRI frame data through eCPRI data separation, respectively entering an IQ data buffer and an OAM data buffer, waiting to be read, and performing CPRI framing.
And acquiring a CPRI frame header according to the eCPRI frame header, and encapsulating the CPRI frame header, the second IQ data and the second OAM data into CPRI frame data according to the CPRI frame structure and sending the CPRI frame data to a CPRI interface.
Specifically, the data processing clock of the CPRI frame data is 122.88M, the data processing clock of the eccri frame data is 125M, and the CPRI frame header is obtained by performing clock conversion on the eccri frame header.
And respectively reading second IQ data and second OAM data from the IQ data cache buffer and the OAM data cache buffer according to the positions of the IQ data and the OAM data in the CPRI frame structure, framing the CPRI frame header, the second IQ data and the second OAM data according to the CPRI frame structure, packaging into CPRI frame data and sending to a CPRI interface.
According to the embodiment of the invention, eCPRI de-framing is carried out on eCPRI frame data obtained from an eCPRI interface to obtain an eCPRI frame header, second IQ data and second OAM data, a CPRI frame header is obtained according to the eCPRI frame header, the CPRI frame header, the second IQ data and the second OAM data are encapsulated into the CPRI frame data according to the CPRI frame structure and are sent to the CPRI interface, data conversion between the eCPRI interface and the CPRI interface can be realized, 4G equipment can compatibly transmit 5G signals without reforming hardware equipment, a 4G network can be upgraded to the 5G network without carrying out wiring construction again, and the construction cost of the 5G network can be greatly reduced. Furthermore, the method is simpler, easier to operate, easier to popularize in various application scenes and higher in universality.
Fig. 2 is a schematic flowchart of a data conversion method between a CPRI interface and an eccri interface according to an embodiment of the present invention. Based on the content of the foregoing embodiments, as shown in fig. 2, the specific steps of performing CPRI deframing on CPRI frame data acquired from a CPRI interface, and acquiring a CPRI frame header, first IQ data, and first OAM data include: and generating a data processing clock of the eCPRI frame data according to the CPRI frame data.
Specifically, 122.88M clock is recovered from CPRI frame data, and the 122.88M clock is input to a fractional division phase-locked loop (fpll), so as to obtain 125M clock as a data processing clock for generating the eccri frame data.
The data processing clock of the eCPRI frame data can be used as the working clock of an eCPRI framing sequence, an eCPRI data combination and an eCPRI interface.
And acquiring a CPRI frame header from CPRI frame data through CPRI frame synchronization.
Specifically, the CPRI frame header is recovered from the CPRI frame data through CPRI frame synchronization.
And generating a first read enable signal of the first IQ data and a first read enable signal of the first OAM data according to the CPRI frame header based on a data processing clock of the eCPRI frame data.
Specifically, the eCPRI framing timing generates a counter of 10ms according to the CPRI frame header, and equally divides the counter of 10ms into counters of N eCPRI frame lengths according to the frame length L of eCPRI, and the value range of each counter is 0-L-1. Wherein 10ms is N times of L, and N is a positive integer.
The eCPRI framing time sequence starts counting from 0 according to a CPRI frame header, counts to L-1 and then starts circulating from 0, and generates read enabling of a buffer when a counter counts to the position according to the storage position of IQ data and OAM data in an eCPRI frame structure, wherein the read enabling is a first read enabling signal IQ _ RD of the first IQ data and a first read enabling signal OAM _ RD of the first OAM data respectively.
Based on a data processing clock of the eCPRI frame data, acquiring first IQ data from the CPRI frame data according to a first read enable signal of the first IQ data, and acquiring first OAM data from the CPRI frame data according to the first read enable signal of the first OAM data.
Specifically, when CPRI data separation is performed, based on the positions where IQ data and OAM data are stored in the CPRI frame structure, data separation is performed on CPRI frame data according to a first read enable signal of the first IQ data, so as to separate out the first IQ data, and the first IQ data is stored in an IQ data buffer; and performing data separation on the CPRI frame data according to the first read enable signal of the first OAM data, separating out the first OAM data, and storing the first OAM data into an OAM data cache buffer.
The embodiment of the invention performs CPRI de-framing on CPRI frame data acquired from a CPRI interface to acquire a CPRI frame header, first IQ data and first OAM data, thereby acquiring an eCPRI frame header according to the CPRI frame header, encapsulating the eCPRI frame header, the first IQ data and the first OAM data into eCPRI frame data according to an eCPRI frame structure and transmitting the eCPRI frame data to the eCPRI interface, realizing data conversion between the CPRI interface and the eCPRI interface, enabling 4G equipment to compatibly transmit 5G signals without reforming hardware equipment, upgrading the 4G network to the 5G network without re-wiring construction, and greatly reducing the construction cost of the 5G network.
Based on the content of the foregoing embodiments, as shown in fig. 2, the specific steps of obtaining an eccri frame header according to the CPRI frame header, encapsulating the eccri frame header, the first IQ data, and the first OAM data into an eccri frame data according to an eccri frame structure, and sending the eccri frame data to the eccri interface include: and performing cross-clock domain conversion on the CPRI frame header based on a data processing clock of the eCPRI frame data to obtain the eCPRI frame header, and generating a second read enabling signal of the first IQ data and a second read enabling signal of the first OAM data according to the CPRI frame header.
Specifically, the eCPRI framing timing converts the CPRI frame header across clock domains into an eCPRI frame header. The eCPRI frame header is used for combining eCPRI data.
The eCPRI framing time sequence also generates the read enable of the IQ data buffer and the OAM data buffer according to the CPRI frame header, which are a second read enable signal of the first IQ data and a second read enable signal of the first OAM data respectively.
And based on a data processing clock of the eCPRI frame data, according to a second read enable signal of the first IQ data and a second read enable signal of the first OAM data, encapsulating the eCPRI frame header, the first IQ data and the first OAM data into eCPRI frame data according to an eCPRI frame structure, and sending the eCPRI frame data to an eCPRI interface.
Specifically, the eCPRI data combiner reads the first IQ data from the IQ data buffer according to the second read enable signal of the first IQ data, and reads the first OAM data from the OAM data buffer according to the second read enable signal of the first OAM data.
And according to the positions of IQ data and OAM data in the eCPRI frame header and the eCPRI frame structure, packaging the eCPRI frame header, the read first IQ data and the read first OAM data to obtain eCPRI frame data.
And after generating eCPRI frame data, sending the eCPRI frame data to an eCPRI interface.
According to the embodiment of the invention, the eCPRI frame header is obtained according to the CPRI frame header, the eCPRI frame header, the first IQ data and the first OAM data are encapsulated into the eCPRI frame data according to the frame structure of eCPRI and are sent to the eCPRI interface, so that the data conversion between the CPRI interface and the eCPRI interface can be realized, 4G equipment can compatibly transmit 5G signals without modifying hardware equipment, a 4G network can be upgraded to a 5G network without re-wiring construction, and the construction cost of the 5G network can be greatly reduced.
Fig. 3 is a schematic flowchart of a data conversion method between a CPRI interface and an eccri interface according to an embodiment of the present invention. Based on the content of the foregoing embodiments, as shown in fig. 3, the specific steps of performing ecc ri deframing on the ecc ri frame data obtained from the ecc ri interface, and obtaining the ecc ri frame header, the second IQ data, and the second OAM data include: and generating a data processing clock of the CPRI frame data according to the eCPRI frame data.
Specifically, 125M clock is recovered from dCPRI frame data, and the 125M clock is input to a fractional division phase-locked loop (fpll), and 122.88M clock is obtained as a data processing clock for generating CPRI frame data.
The data processing clock of the CPRI frame data can be used as a working clock of a CPRI framing time sequence, a CPRI data combining circuit and a CPRI interface.
And acquiring an eCPRI frame header from eCPRI frame data through eCPRI frame synchronization.
Specifically, an eCPRI frame header is recovered from eCPRI frame data through eCPRI frame synchronization.
And generating a first read enable signal of the second IQ data and a first read enable signal of the second OAM data according to the CPRI frame header based on a data processing clock of the CPRI frame data.
Specifically, the CPRI framing timing sequence generates a counter of 10ms according to a CPRI frame header, and generates a frame counter of three-level nesting according to the lengths of a base frame, a superframe and a wireless frame in a CPRI frame structure, wherein the value range of the base frame counter is 0-31, the value range of the superframe counter is 0-255, and the value range of the wireless frame counter is 0-255.
According to the positions of IQ data and OAM data in a CPRI frame structure, the CPRI framing time sequence generates read enable of a buffer when the frame counter nested in the third level counts to the corresponding positions, and the read enable is respectively a first read enable signal IQ _ RD of second IQ data and a first read enable signal OAM _ RD of second OAM data.
And acquiring second IQ data from eCPRI frame data according to a first read enable signal of the second IQ data based on a data processing clock of the CPRI frame data, and acquiring second OAM data from the eCPRI frame data according to the first read enable signal of the second OAM data.
Specifically, when the eCPRI data is separated, based on the storage positions of IQ data and OAM data in an eCPRI frame structure, the data of eCPRI frame data is separated according to a first read enable signal of second IQ data, the second IQ data is separated and stored in an IQ data buffer; and performing data separation on the eCPRI frame data according to the first read enabling signal of the second OAM data, separating out the second OAM data, and storing the second OAM data into an OAM data cache buffer.
According to the embodiment of the invention, the eCPRI frame data acquired from the eCPRI interface is subjected to eCPRI de-framing to acquire the eCPRI frame header, the second IQ data and the second OAM data, so that the CPRI frame header can be acquired according to the eCPRI frame header, the CPRI frame header, the second IQ data and the second OAM data are encapsulated into the CPRI frame data according to the CPRI frame structure and are transmitted to the CPRI interface, data conversion between the eCPRI interface and the CPRI interface can be realized, 4G equipment can compatibly transmit 5G signals without modifying hardware equipment, a 4G network can be upgraded to the 5G network without re-wiring construction, and the construction cost of the 5G network can be greatly reduced.
Based on the content of the foregoing embodiments, as shown in fig. 3, the specific steps of obtaining the CPRI frame header according to the eccri frame header, encapsulating the CPRI frame header, the second IQ data, and the second OAM data into CPRI frame data according to the CPRI frame structure, and sending the CPRI frame data to the CPRI interface include: and performing cross-clock domain conversion on the eCPRI frame header based on the data processing clock of the CPRI frame data to acquire the CPRI frame header, and generating a second read enabling signal of second IQ data and a second read enabling signal of second OAM data according to the eCPRI frame header.
Specifically, the CPRI framing timing converts the eccri frame header into the CPRI frame header across the clock domain. The CPRI frame header is used for CPRI data combination.
The CPRI framing timing further generates read enable signals of the IQ data buffer and the OAM data buffer according to the eccri frame header, which are a second read enable signal of the second IQ data and a second read enable signal of the second OAM data, respectively.
And based on the data processing clock of the CPRI frame data, according to a second read enable signal of the second IQ data and a second read enable signal of the second OAM data, packaging the CPRI frame header, the second IQ data and the second OAM data into CPRI frame data according to a CPRI frame structure, and sending the CPRI frame data to the CPRI interface.
Specifically, the CPRI data combiner reads the second IQ data from the IQ data buffer according to a second read enable signal of the second IQ data, and reads the second OAM data from the OAM data buffer according to the second read enable signal of the second OAM data.
And packaging the CPRI frame header, the read second IQ data and the second OAM data according to the positions of the IQ data and the OAM data in the CPRI frame header and CPRI frame structure to obtain CPRI frame data.
And after the CPRI frame data are generated, sending the CPRI frame data to a CPRI interface.
The embodiment of the invention acquires the CPRI frame header according to the eCPRI frame header, encapsulates the CPRI frame header, the second IQ data and the second OAM data into CPRI frame data according to the frame structure of CPRI, and sends the CPRI frame data to the CPRI interface, thereby realizing the data conversion between the eCPRI interface and the CPRI interface, enabling 4G equipment to compatibly transmit 5G signals without modifying hardware equipment, upgrading the 4G network to the 5G network without re-wiring construction, and greatly reducing the construction cost of the 5G network.
Fig. 4 is a schematic structural diagram of a data conversion apparatus between a CPRI interface and an eccri interface according to an embodiment of the present invention. Based on the content of the foregoing embodiments, as shown in fig. 4, the apparatus includes a CPRI deframing module 401 and an eccri framing module 402, where:
a CPRI deframing module 401, configured to perform CPRI deframing on CPRI frame data obtained from a CPRI interface, and obtain a CPRI frame header, first IQ data, and first OAM data;
the eCPRI framing module 402 is configured to acquire an eCPRI frame header according to the CPRI frame header, encapsulate the eCPRI frame header, the first IQ data, and the first OAM data according to an eCPRI frame structure to form an eCPRI frame data, and send the eCPRI frame data to the eCPRI interface.
Specifically, the CPRI deframing module 401 is electrically connected to the eccri framing module 402.
After receiving the CPRI frame data through the CPRI interface, the CPRI deframing module 401 performs CPRI deframing on the CPRI frame data.
The CPRI frame decoding mainly performs CPRI frame synchronization and CPRI data separation.
The CPRI frame header can be acquired through CPRI frame synchronization.
Through CPRI data separation, separating out first IQ data and first OAM data from CPRI frame data, and respectively entering IQ data buffer and OAM data buffer.
The eCPRI framing module 402 performs clock conversion on the CPRI frame header to obtain an eCPRI frame header; according to the positions of IQ data and OAM data in an eCPRI frame structure, reading first IQ data and first OAM data from an IQ data cache buffer and an OAM data cache buffer respectively, framing an eCPRI frame header, the first IQ data and the first OAM data according to the eCPRI frame structure, packaging the eCPRI frame data and sending the eCPRI frame data to an eCPRI interface.
The specific method and flow for implementing the corresponding function by each module included in the data conversion device between the CPRI interface and the eccri interface provided in the embodiments of the present invention are described in detail in the embodiments of the data conversion method between the CPRI interface and the eccri interface, and no further description is given here.
The data conversion device between the CPRI interface and the eccri interface is used in the data conversion method between the CPRI interface and the eccri interface in the foregoing embodiments. Therefore, the description and definition of the data conversion method between the CPRI interface and the eccri interface in the foregoing embodiments may be used for understanding the execution modules in the embodiments of the present invention.
The embodiment of the invention performs CPRI de-framing on CPRI frame data acquired from a CPRI interface to acquire a CPRI frame header, first IQ data and first OAM data, acquires an eCPRI frame header according to the CPRI frame header, encapsulates the eCPRI frame header, the first IQ data and the first OAM data into eCPRI frame data according to the frame structure of eCPRI, and transmits the eCPRI frame data to the eCPPRI interface, thereby realizing data conversion between the CPRI interface and the eCPPRI interface, enabling 4G equipment to compatibly transmit 5G signals without modifying hardware equipment, upgrading the 4G network to the 5G network without re-wiring construction, and greatly reducing the construction cost of the 5G network. Furthermore, the method is simpler, easier to operate, easier to popularize in various application scenes and higher in universality.
Fig. 5 is a schematic structural diagram of a data conversion apparatus between a CPRI interface and an eccri interface according to an embodiment of the present invention. Based on the content of the foregoing embodiments, as shown in fig. 5, the data conversion apparatus between the CPRI interface and the eccri interface further includes:
an eCPRI deframing module 403, configured to perform CPRI deframing on eCPPRI frame data obtained from an eCPRI interface, to obtain an eCPRI frame header, IQ data, and OAM data;
the CPRI framing module 404 is configured to acquire a CPRI frame header according to the eccri frame header, encapsulate the CPRI frame header, the IQ data, and the OAM data into CPRI frame data according to a frame structure of the CPRI, and send the CPRI frame data to the CPRI interface.
Specifically, the data conversion apparatus may include an eccri deframing module 403 and a CPRI framing module 404, in addition to the CPRI deframing module 401 and the eccri framing module 402.
The eccri deframing module 403 is electrically connected to the CPRI framing module 404.
The eccri deframing module 403 performs eccri deframing on the eccri frame data after receiving the eccri frame data through the eccri interface.
The eCPRI de-framing mainly performs eCPRI frame synchronization and eCPRI data separation.
The eCPRI frame header can be obtained through eCPRI frame synchronization.
Through eCPRI data separation, second IQ data and second OAM data are separated from the eCPRI frame data and respectively enter an IQ data buffer and an OAM data buffer.
The CPRI framing module 404 performs clock conversion on the eccri frame header to obtain a CPRI frame header; and respectively reading second IQ data and second OAM data from the IQ data cache buffer and the OAM data cache buffer according to the positions of the IQ data and the OAM data in the CPRI frame structure, framing the CPRI frame header, the second IQ data and the second OAM data according to the CPRI frame structure, packaging into CPRI frame data and sending to a CPRI interface.
According to the embodiment of the invention, eCPRI de-framing is carried out on eCPRI frame data obtained from an eCPRI interface to obtain an eCPRI frame header, second IQ data and second OAM data, a CPRI frame header is obtained according to the eCPRI frame header, the CPRI frame header, the second IQ data and the second OAM data are encapsulated into the CPRI frame data according to the CPRI frame structure and are sent to the CPRI interface, data conversion between the eCPRI interface and the CPRI interface can be realized, 4G equipment can compatibly transmit 5G signals without reforming hardware equipment, a 4G network can be upgraded to the 5G network without carrying out wiring construction again, and the construction cost of the 5G network can be greatly reduced. Furthermore, the method is simpler, easier to operate, easier to popularize in various application scenes and higher in universality.
Fig. 6 is a schematic physical structure diagram of an electronic device according to an embodiment of the present invention. Based on the content of the above embodiment, as shown in fig. 6, the electronic device may include: a processor (processor)601, a memory (memory)602, and a bus 603; wherein, the processor 601 and the memory 602 complete the communication with each other through the bus 603; the processor 601 is configured to invoke computer program instructions stored in the memory 602 and executable on the processor 601 to execute a data conversion method between the CPRI interface and the eccri interface according to the embodiments of the methods described above, including: performing CPRI deframing on CPRI frame data acquired from a CPRI interface to acquire a CPRI frame header, first IQ data and first OAM data; and acquiring an eCPRI frame header according to the CPRI frame header, encapsulating the eCPRI frame header, the first IQ data and the first OAM data into eCPRI frame data according to an eCPRI frame structure, and sending the eCPRI frame data to an eCPRI interface.
Another embodiment of the present invention discloses a computer program product, which includes a computer program stored on a non-transitory computer-readable storage medium, the computer program includes program instructions, and when the program instructions are executed by a computer, the computer can execute a data conversion method between a CPRI interface and an eccri interface provided in the above-mentioned embodiments of the method, for example, the method includes: performing CPRI deframing on CPRI frame data acquired from a CPRI interface to acquire a CPRI frame header, first IQ data and first OAM data; and acquiring an eCPRI frame header according to the CPRI frame header, encapsulating the eCPRI frame header, the first IQ data and the first OAM data into eCPRI frame data according to an eCPRI frame structure, and sending the eCPRI frame data to an eCPRI interface.
Furthermore, the logic instructions in the memory 602 may be implemented in software functional units and stored in a computer readable storage medium when the logic instructions are sold or used as independent products. Based on such understanding, the technical solutions of the embodiments of the present invention may be essentially implemented or make a contribution to the prior art, or may be implemented in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the methods of the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
Another embodiment of the present invention provides a non-transitory computer-readable storage medium, which stores computer instructions, where the computer instructions cause a computer to execute a method for data conversion between a CPRI interface and an eccri interface according to the above-mentioned method embodiments, for example, the method includes: performing CPRI deframing on CPRI frame data acquired from a CPRI interface to acquire a CPRI frame header, first IQ data and first OAM data; and acquiring an eCPRI frame header according to the CPRI frame header, encapsulating the eCPRI frame header, the first IQ data and the first OAM data into eCPRI frame data according to an eCPRI frame structure, and sending the eCPRI frame data to an eCPRI interface.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. It is understood that the above-described technical solutions may be embodied in the form of a software product, which may be stored in a computer-readable storage medium, such as ROM/RAM, magnetic disk, optical disk, etc., and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method of the above-described embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (10)

1. A data conversion method between a CPRI interface and an eCPRI interface is characterized by comprising the following steps:
performing CPRI deframing on CPRI frame data acquired from a CPRI interface to acquire a CPRI frame header, first IQ data and first OAM data;
and acquiring an eCPRI frame header according to the CPRI frame header, encapsulating the eCPRI frame header, the first IQ data and the first OAM data into eCPRI frame data according to an eCPRI frame structure, and sending the eCPRI frame data to an eCPRI interface.
2. The method of claim 1, further comprising:
performing eCPRI deframing on eCPRI frame data acquired from an eCPRI interface to acquire an eCPRI frame header, second IQ data and second OAM data;
and acquiring a CPRI frame header according to the eCPRI frame header, and encapsulating the CPRI frame header, the second IQ data and the second OAM data into CPRI frame data according to a CPRI frame structure and sending the CPRI frame data to a CPRI interface.
3. The method according to claim 1, wherein the step of performing CPRI deframing on CPRI frame data obtained from the CPRI interface to obtain a CPRI frame header, first IQ data, and first OAM data includes:
generating a data processing clock of the eCPRI frame data according to the CPRI frame data;
acquiring the CPRI frame header from the CPRI frame data through CPRI frame synchronization;
generating a first read enable signal of the first IQ data and a first read enable signal of the first OAM data according to the CPRI frame header based on a data processing clock of the eCPRI frame data;
based on the data processing clock of the eCPRI frame data, acquiring the first IQ data from the CPRI frame data according to a first read enable signal of the first IQ data, and acquiring the first OAM data from the CPRI frame data according to the first read enable signal of the first OAM data.
4. The method according to claim 3, wherein the step of obtaining an eCPRI frame header according to the CPRI frame header, and the step of encapsulating the eCPRI frame header, the first IQ data, and the first OAM data into eCPRI frame data according to an eCPRI frame structure and sending the eCPRI frame data to the eCPRI interface comprises the specific steps of:
performing cross-clock domain conversion on the CPRI frame header based on a data processing clock of the eCPPRI frame data to acquire the eCPPRI frame header, and generating a second read enable signal of the first IQ data and a second read enable signal of the first OAM data according to the CPRI frame header;
based on the data processing clock of the eCPRI frame data, according to the second read enable signal of the first IQ data and the second read enable signal of the first OAM data, the eCPRI frame header, the first IQ data and the first OAM data are encapsulated into eCPRI frame data according to an eCPRI frame structure and sent to the eCPRI interface.
5. The method according to any one of claims 2 to 4, wherein the step of performing eCPRI de-framing on eCPRI frame data obtained from the eCPRI interface to obtain an eCPRI header, second IQ data, and second OAM data includes:
generating a data processing clock of the CPRI frame data according to the eCPRI frame data;
acquiring an eCPRI frame header from eCPRI frame data through eCPRI frame synchronization;
generating a first read enable signal of the second IQ data and a first read enable signal of the second OAM data according to the CPRI frame header based on a data processing clock of the CPRI frame data;
and acquiring the second IQ data from the eCPRI frame data according to a first read enable signal of the second IQ data based on the data processing clock of the CPRI frame data, and acquiring the second OAM data from the eCPRI frame data according to the first read enable signal of the second OAM data.
6. The method according to claim 5, wherein the step of obtaining a CPRI frame header according to the eccri frame header, and encapsulating the CPRI frame header, the second IQ data, and the second OAM data into CPRI frame data according to a CPRI frame structure, and sending the CPRI frame data to the CPRI interface comprises:
performing cross-clock domain conversion on the eCPPRI frame header based on the data processing clock of the CPRI frame data to acquire the CPRI frame header, and generating a second read enable signal of the second IQ data and a second read enable signal of the second OAM data according to the eCPPRI frame header;
and based on the data processing clock of the CPRI frame data, according to the second read enable signal of the second IQ data and the second read enable signal of the second OAM data, encapsulating the CPRI frame header, the second IQ data, and the second OAM data into CPRI frame data according to a frame structure of CPRI, and sending the CPRI frame data to the CPRI interface.
7. A data conversion apparatus between a CPRI interface and an eccri interface, comprising:
the CPRI de-framing module is used for performing CPRI de-framing on CPRI frame data acquired from the CPRI interface to acquire a CPRI frame header, first IQ data and first OAM data;
an eCPRI framing module, configured to obtain an eCPRI frame header according to the CPRI frame header, encapsulate the eCPRI frame header, the first IQ data, and the first OAM data into eCPRI frame data according to an eCPRI frame structure, and send the eCPRI frame data to an eCPRI interface.
8. The apparatus for converting data between a CPRI interface and an eccri interface of claim 7, further comprising:
the eCPRI de-framing module is used for performing CPRI de-framing on eCPRI frame data acquired from the eCPRI interface to acquire an eCPRI frame header, second IQ data and second OAM data;
and the CPRI framing module is used for acquiring a CPRI frame header according to the eCPRI frame header, and encapsulating the CPRI frame header, the second IQ data and the second OAM data into CPRI frame data according to a CPRI frame structure and sending the CPRI frame data to a CPRI interface.
9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the steps of the method for converting data between the CPRI interface and the eccri interface according to any one of claims 1 to 6 when executing the program.
10. A non-transitory computer-readable storage medium, on which a computer program is stored, wherein the computer program, when being executed by a processor, implements the steps of the data conversion method between the CPRI interface and the eccri interface according to any one of claims 1 to 6.
CN202010645941.6A 2020-07-07 2020-07-07 Data conversion method and device between CPRI interface and eCPRI interface Pending CN111835748A (en)

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