WO2012159482A1

WO2012159482A1 - Method and device for acquiring ethernet data frame, and base station

Info

Publication number: WO2012159482A1
Application number: PCT/CN2012/072618
Authority: WO
Inventors: 李晋; 陈潇; 谭然; 乾春燕
Original assignee: 中兴通讯股份有限公司
Priority date: 2011-05-26
Filing date: 2012-03-20
Publication date: 2012-11-29
Also published as: CN102802170A; CN102802170B

Abstract

Disclosed are a method and device for acquiring an Ethernet data frame, and a base station. The method comprises: a base band unit and a radio unit extracting an Ethernet data frame from a CPRI protocol-based data frame when exchanging the CPRI protocol-based data frame, and sending the extracted Ethernet data frame to a capture device externally connected to the base band unit or the radio unit. Through the present invention, the Ethernet data frame encapsulated in the CPRI protocol-based data frame and exchanged between the base band unit and the radio unit can be easily captured, the content of the Ethernet data frame can be directly viewed or commonly used Ethernet data frame capture software can be used to capture the Ethernet data frame and assist in analysis of the frame.

Description

Method, device and base station for acquiring Ethernet data frame

The present invention relates to the field of communications, and in particular, to a method, an apparatus, and a base station for acquiring an Ethernet data frame. Background technique

In a base station system for mobile communication, a single base station is generally divided into a baseband unit and a radio unit. When constructing a single base station, the radio unit can be combined with the baseband unit to form a centralized base station, or can be separately placed to form a distributed base station system.

With the development of mobile communication technologies, especially in the third generation mobile communication systems, base stations that traditionally integrate baseband units and radio frequency units are difficult to adapt to the needs of rapid network construction. Therefore, most of the new generation of base stations adopt a distributed base station system, that is, a new network structure in which a baseband unit (Base Band Unit) and a radio unit (Radio Unit) are formed as shown in FIG. The optical fiber (cable) connection between the baseband unit and the radio frequency unit is mainly adopted by the CPRI (Common Public Radio Interface) protocol specification.

The CPRI protocol specification is a standard jointly developed by a number of companies in the communications industry. It regulates the key interfaces between REC (Radio Equipment Controller) and RE (Radio Equipment) in wireless base stations. The data frame structure of the CPRI protocol is shown in Figure 2. The data frame of the CPRI protocol is encapsulated with Ethernet (Ethernet) data frames and other protocol format data frames. Based on the CPRI protocol specification, the versatility of the interface between the baseband unit and the radio unit can be improved. In a mobile communication base station system, REC corresponds to a baseband unit, and RE corresponds to a radio frequency unit. For frame transmission, the CPRI protocol data frame may also include other baseband units and radio units. Data subframes of other protocol formats that need to interact. Generally, the baseband unit performs operation and maintenance information such as configuration management and alarm collection of the radio unit through the Ethernet data frame. If the user needs to view the information of the Ethernet data frame, the Ethernet data frame needs to be captured. However, since the CPRI protocol data frame is transmitted between the baseband unit and the radio frequency unit, if the Ethernet data frame is to be captured, the CPRI protocol data frame needs to be parsed by other professional equipment, and extracted in the CPRI protocol data frame. Ethernet data frames, and can not affect the normal communication between the baseband unit and the radio unit; otherwise it will not be directly viewable. This makes the usual Ethernet data frame capture software unable to complete the capture. Summary of the invention

The main object of the present invention is to provide a method, device and base station for acquiring an Ethernet data frame, which can easily acquire an Ethernet data frame.

The present invention provides a method for obtaining an Ethernet data frame, including:

While the baseband unit and the radio unit are interacting with the CPRI protocol data frame, the baseband unit or the radio unit extracts the intra-frame Ethernet data frame of the CPRI protocol data and sends it to the capture device externally connected to the baseband unit or the radio unit.

Preferably, the baseband unit and the radio frequency unit extract the CPRI protocol data intraframe Ethernet data frame and transmit the data to the baseband unit or the radio frequency unit while the CPRI protocol data frame is being exchanged. The external capture device includes:

The CPU module of the baseband unit or the radio frequency unit sends the Ethernet data frame to the external interface module other than the CPRI protocol interface simultaneously or after sending the Ethernet data frame to the CPRI protocol module; or the CPU module receives the CPRI protocol module to send Simultaneously or after the Ethernet data frame, forwarding the Ethernet data frame to the external interface module;

The external interface module transmits an Ethernet data frame to the capture device.

Preferably, when the CPU module sends the Ethernet data frame to the CPRI protocol module, the sending of the Ethernet data frame to the external interface module includes: Transmitting, by the CPU module, an Ethernet data frame to the CPRI protocol module, copying the Ethernet data frame, and transmitting the copied Ethernet data frame to the external interface module; or

After the CPU module sends the Ethernet data frame to the CPRI protocol module of the local end, the CPU data frame is sent to the external interface module twice.

Preferably, when the CPU module receives the Ethernet data frame sent by the CPRI protocol module, the forwarding of the Ethernet data frame to the external interface module includes:

Receiving, by the CPU module, the Ethernet data frame sent by the CPRI protocol module, copying the Ethernet data frame, and transmitting the copied Ethernet data frame to the external interface module; or

After receiving the Ethernet data frame sent by the CPRI protocol module, the CPU module sends the Ethernet data frame to the external interface module twice.

The present invention also provides an apparatus for acquiring an Ethernet data frame, including a CPU module, a CPRI protocol module, and an external interface module other than the CPRI protocol interface, and the CPU module sends an Ethernet data frame to the CPRI protocol module simultaneously or after, Sending the Ethernet data frame to the external interface module; or the CPU module forwards the Ethernet data frame to the external interface module simultaneously or after receiving the Ethernet data frame sent by the CPRI protocol module;

The external interface module transmits an Ethernet data frame to a capture device having the capability to capture Ethernet data frames.

Preferably, the external interface module is an Ethernet interface module or a serial communication interface module. Preferably, the CPU module is further configured to:

And transmitting the Ethernet data frame to the CPRI protocol module, copying the Ethernet data frame, and transmitting the copied Ethernet data frame to the external interface module; or

After the Ethernet data frame is sent to the CPRI protocol module of the local end, the Ethernet data frame is sent to the external interface module twice. Preferably, the CPU module is further configured to:

Receiving the Ethernet data frame sent by the CPRI protocol module, copying the Ethernet data frame, and transmitting the copied Ethernet data frame to the external interface module; or

After receiving the Ethernet data frame sent by the CPRI protocol module, the Ethernet data frame is sent to the external interface module twice.

The present invention also provides a base station, including a baseband unit and a radio frequency unit. The baseband unit and the radio frequency unit are used to extract the data frame of the CPRI protocol data frame while the CPRI protocol data frame is being exchanged. And sent to a capture device external to the baseband unit or radio frequency unit.

Preferably, the baseband unit or the radio frequency unit includes a CPU module, a CPRI protocol module, and an external interface module other than the CPRI protocol interface, and the CPU module sends the Ethernet data frame to the CPRI protocol module simultaneously or after sending the Ethernet The network data frame is sent to the external interface module; or the CPU module forwards the Ethernet data frame to the external interface module simultaneously or after receiving the Ethernet data frame sent by the CPRI protocol module;

After the Ethernet data frame is sent to the CPRI protocol module of the local end, the Ethernet data frame is sent to the external interface module twice.

Preferably, the CPU module is further configured to:

Receiving the Ethernet data frame sent by the CPRI protocol module, copying the Ethernet data frame, and transmitting the copied Ethernet data frame to the external interface module; or After receiving the Ethernet data frame sent by the CPRI protocol module, the Ethernet data frame is sent to the external interface module twice.

The method, device and base station for acquiring an Ethernet data frame provided by the present invention can easily capture an Ethernet data frame encapsulated in a CPRI protocol data frame between a baseband unit and a radio frequency unit, by using the method and the device, Ethernet data frame content can be viewed directly or captured and analyzed using commonly used Ethernet data frame capture software. DRAWINGS

1 is a schematic structural diagram of a distributed base station in the prior art;

2 is a schematic diagram of a data frame of a CPRI protocol in the prior art;

FIG. 3 is a schematic diagram of transmission of a prior art Ethernet data frame;

4 is a schematic flowchart of a method for obtaining an Ethernet data frame according to an embodiment of the present invention; FIG. 5 is a schematic flowchart of a method for obtaining an Ethernet data frame according to an embodiment of the present invention;

6 is another schematic flowchart of an obtaining step in an embodiment of a method for obtaining an Ethernet data frame according to the present invention;

FIG. 7 is a schematic structural diagram of an apparatus for acquiring an Ethernet data frame according to the present invention; FIG. 8 is a schematic structural diagram of an embodiment of a base station according to the present invention. detailed description

It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to FIG. 4, an embodiment of the method for obtaining an Ethernet data frame according to the present invention includes: a baseband unit and a radio frequency unit simultaneously interacting with a CPRI protocol data frame, the baseband unit or the radio frequency unit transmitting an intra-frame Ethernet data of a CPRI protocol data. The frame is extracted and sent to a capture device external to the baseband unit or radio frequency unit. The above steps may include:

Step S10: The CPU (Central Processing Unit) module of the baseband unit or the radio frequency unit sends the Ethernet data frame to the external interface module other than the CPRI protocol interface simultaneously or after sending the Ethernet data frame to the CPRI protocol module; or the CPU module Receiving the Ethernet data frame to the external interface module simultaneously or after receiving the Ethernet data frame sent by the CPRI protocol module;

The CPRI protocol module of the baseband unit (radio unit) is responsible for encapsulating and parsing data frames including Ethernet data frames. When transmitting data, each functional module of the baseband unit (radio frequency unit) sends the data to be sent to the CPRI protocol module on the baseband unit (radio unit) (where the Ethernet data frame sent by the CPU module is the transmission data to be captured by the present invention) The CPRI protocol module encapsulates all data into CPRI protocol data frames according to the protocol format and sends them to the opposite radio frequency unit (baseband unit); when receiving data, the CPRI protocol module on the baseband unit (radio unit) pairs the opposite radio frequency The CPRI protocol data frame received by the unit (baseband unit) is parsed, and the parsed data is sent to the corresponding baseband unit (radio frequency unit) function module for processing (the Ethernet data frame sent to the CPU module is to be captured by the present invention) The data).

The above CPU module may further comprise two sub-modules: a data transceiver sub-module and a data processing sub-module. The data transceiver sub-module is responsible for receiving and transmitting the Ethernet data frame to complete the interaction with the operation and maintenance information of the radio frequency unit (baseband unit); and the data processing sub-module processes the received Ethernet data frame, and is required to The source of the transmitted Ethernet data frame.

In this embodiment, the CPRI protocol module is responsible for extracting the Ethernet data frame in the CPRI protocol data frame, the CPU module is responsible for forwarding the Ethernet data frame, and the external interface module is responsible for sending the Ethernet data frame from the interface. When the baseband unit performs data interaction with the radio frequency unit, only one of the terminals needs to obtain an Ethernet data frame when transmitting or receiving data, and the CPU module sends the Ethernet Ethernet frame while sending the Ethernet data frame to the CPRI protocol module. The network data frame is forwarded to the external interface module, or the Ethernet data frame is forwarded to the external interface module at the same time as or after receiving the Ethernet data frame sent by the CPRI protocol module. Step S11: The external interface module sends the Ethernet data frame to the capture device having the capability of capturing the Ethernet data frame.

Use an Ethernet cable or serial communication cable to connect the Ethernet interface or serial interface of the baseband unit (RF unit) to a capture device with the ability to capture Ethernet data frames (such as a computer with common Ethernet data frame capture software) Connect, you can use the Ethernet data frame capture software to capture and analyze the Ethernet data frames sent by the CPU module.

In this embodiment, the Ethernet data frame encapsulated in the data frame of the CPRI protocol can be easily captured between the baseband unit and the radio frequency unit. By using the method, the content of the Ethernet data frame can be directly viewed or the commonly used Ethernet data can be used. The frame capture software captures and assists it. In an embodiment, the external interface module is an Ethernet interface module or a serial communication interface module.

The external interface module is configured to send and receive Ethernet data frames sent by the CPU module, and may be an Ethernet interface module or a serial communication interface module, wherein the Ethernet interface module is configured to send and receive Ethernet on the Ethernet interface of the baseband unit (RF unit) The network data frame, and the serial communication interface module is used to send and receive related serial communication protocol data frames on the serial communication interface. The above two interface modules are generally used for debugging, maintenance, and other purposes. They are necessary modules on the baseband unit (RF unit), and need to be configured separately to achieve cost savings.

Referring to FIG. 5, in the above embodiment, step S10 includes:

Step S101: The CPU module sends the Ethernet data frame to the CPRI protocol module, copies the Ethernet data frame, and sends the copied Ethernet data frame to the external interface module; or, in step S102, the CPU module sends the Ethernet data frame. After the CPRI protocol module of the local end is sent, the Ethernet data frame is sent to the external interface module twice.

When the data processing submodule of the CPU module sends an Ethernet data frame to the CPRI protocol module through the data transceiver submodule of the CPU module, the CPU data transceiving submodule copies the same copy. The Ethernet data frame; the data transceiver sub-module sends the copied Ethernet data frame to the external interface module, and the external interface module sends the corresponding interface;

Alternatively, after the data processing sub-module of the CPU module sends the Ethernet data frame to be sent to the CPRI protocol module through the data transceiver sub-module of the CPU module, the data transceiver sub-module of the CPU module sends the Ethernet data frame a second time. , that is, sent to the external interface module, which is sent by the external interface module from the corresponding interface.

Referring to FIG. 6, in the above embodiment, step S10 includes:

Step S103: The CPU module receives the Ethernet data frame sent by the CPRI protocol module, copies the Ethernet data frame, and sends the copied Ethernet data frame to the external interface module. Alternatively, step S104, the CPU module receives the CPRI protocol module. After the transmitted Ethernet data frame, the Ethernet data frame is sent to the external interface module twice.

The CPRI protocol module parses the received CPRI protocol data frame, and sends the Ethernet data frame to the data transceiver sub-module of the CPU module; the data transceiver sub-module receives the Ethernet data frame sent by the CPRI protocol module, according to the normal The method sends a copy of the same Ethernet data frame to the data processing sub-module of the CPU module; the data transceiver sub-module sends the copied Ethernet data frame to the external interface module, and the external interface module sends the corresponding interface. Or, the data transceiver sub-module receives the Ethernet data frame sent by the CPRI protocol module, and after transmitting the data processing sub-module to the CPU module in the normal manner, the data transceiver sub-module of the CPU module performs the second data frame on the Ethernet data frame. The second transmission, that is, sent to the external interface module, is sent by the external interface module from the corresponding interface.

Referring to Figure 7, an apparatus 300 for obtaining an Ethernet data frame according to the present invention is provided. The embodiment includes a CPU module 10, a CPRI protocol module 20, and an external interface module 30 other than the CPRI protocol interface. The CPU module 10 transmits an Ethernet data frame to the CPRI. Simultaneously or after the protocol module 20 sends the Ethernet data frame to the external interface module 30; or, the CPU module 10 receives the Ethernet data frame sent by the CPRI protocol module 20, or forwards the Ethernet data frame to the external Interface module 30;

The external interface module 30 sends the Ethernet data frame to a capture device having the capability to capture Ethernet data frames.

The apparatus 300 for acquiring an Ethernet data frame of this embodiment may be a baseband unit or a radio frequency unit. Its CPRI protocol module 20 is responsible for encapsulating and parsing data frames including Ethernet data frames. When transmitting data, each functional module of the baseband unit (radio frequency unit) sends the data to be sent to the CPRI protocol module 20 on the baseband unit (radio frequency unit) (where the Ethernet data frame sent by the CPU module 10 is to be captured by the present invention) Send data), will be implemented by CPRI protocol module 20

!/, the format is encapsulated into CPRI protocol data frames and sent ^

When the data is received, the CPRI protocol module 20 on the baseband unit (radio unit) parses the CPRI protocol data frame received from the opposite radio unit (baseband unit), and sends the parsed data to the corresponding baseband. The unit (radio unit) function module performs processing (where the Ethernet data frame sent to the CPU module 10 is the data to be captured by the present invention).

The CPU module 10 described above may further comprise two sub-modules: a data transceiver sub-module and a data processing sub-module. The data transceiver sub-module is responsible for receiving and transmitting the Ethernet data frame to complete the interaction with the operation and maintenance information of the radio frequency unit (baseband unit); and the data processing sub-module processes the received Ethernet data frame, and is required to The source of the transmitted Ethernet data frame.

In this embodiment, the CPRI protocol module 20 is responsible for extracting the Ethernet data frame in the CPRI protocol data frame, the CPU module 10 is responsible for forwarding the Ethernet data frame, and the external interface module 30 is responsible for sending the Ethernet data frame from the interface. . When the baseband unit performs data interaction with the radio frequency unit, only one of the terminals needs to obtain an Ethernet data frame when transmitting or receiving data, and the CPU module sends the Ethernet Ethernet frame while sending the Ethernet data frame to the CPRI protocol module. The network data frame is forwarded to the external interface module, or the Ethernet data frame is forwarded to the external interface module at the same time as or after receiving the Ethernet data frame sent by the CPRI protocol module.

Use the Ethernet cable or serial communication cable to connect the Ethernet of the baseband unit (RF unit) The network interface or serial interface is connected to a capture device (such as a computer with common Ethernet data frame capture software) that captures Ethernet data frame capability, and can use Ethernet data frame capture software to send Ethernet data frames to the CPU module. Capture and analyze.

In this embodiment, the Ethernet data frame encapsulated in the CPRI protocol data frame can be easily captured between the baseband unit and the radio frequency unit, and the device can directly view the content of the Ethernet data frame or use commonly used Ethernet data. The frame capture software captures and assists it. In an embodiment, the external interface module 30 is an Ethernet interface module or a serial communication interface module.

The external interface module 30 is configured to send and receive Ethernet data frames sent by the CPU module 10, and may be an Ethernet interface module or a serial communication interface module, where the Ethernet interface module is used on the Ethernet interface of the baseband unit (RF unit). The Ethernet data frame is sent and received, and the serial communication interface module is used to send and receive related serial communication protocol data frames on the serial communication interface. The above two interface modules are generally used for debugging, maintenance and other purposes. They are necessary modules on the baseband unit (RF unit) and can be saved without cost.

In the above embodiment, the CPU module 10 is specifically configured to:

Sending the Ethernet data frame to the CPRI protocol module 20, copying the Ethernet data frame, and transmitting the copied Ethernet data frame to the external interface module 30; or

After the Ethernet data frame is sent to the CPRI protocol module 20 of the local end, the Ethernet data frame is sent to the external interface module 30 twice.

The data processing submodule of the CPU module 10 transmits an Ethernet data frame to the CPRI protocol module 20 through the data transceiving submodule of the CPU module 10, and the CPU data transceiving submodule copies an identical Ethernet data frame; the data transceiving submodule The copied Ethernet data frame is sent to the external interface module 30, and is sent by the external interface module 30 from the corresponding interface;

Alternatively, the data processing sub-module of the CPU module 10 passes the Ethernet data frame to be transmitted. After the data transceiving sub-module of the CPU module 10 is sent to the CPRI protocol module 20, the data transceiving sub-module of the CPU module 10 transmits the Ethernet data frame a second time, that is, to the external interface module 30, and the external interface module 30 Issued from the corresponding interface.

In the above embodiment, the CPU module 10 is further configured to:

Receiving the Ethernet data frame sent by the CPRI protocol module 20, copying the Ethernet data frame, and transmitting the copied Ethernet data frame to the external interface module 30; or

After receiving the Ethernet data frame sent by the CPRI protocol module 20, the Ethernet data frame is sent to the external interface module 30 twice.

The CPRI protocol module 20 parses the received CPRI protocol data frame, and sends the Ethernet data frame to the data transceiver sub-module of the CPU module 10; the data transceiver sub-module receives the Ethernet data frame sent by the CPRI protocol module 20, The same data frame is copied to the data processing sub-module of the CPU module 10 in the normal manner; the data transceiver sub-module transmits the copied Ethernet data frame to the external interface module 30, and the external interface module 30 Issued from the corresponding interface;

Alternatively, the data transceiver sub-module receives the Ethernet data frame sent by the CPRI protocol module 20, and after transmitting to the data processing sub-module of the CPU module 10 in the normal manner, the data transceiver sub-module of the CPU module 10 then the Ethernet data frame. The second transmission is sent to the external interface module, and the external interface module sends the corresponding interface.

Referring to FIG. 8, an embodiment of a base station according to the present invention is provided, including a baseband unit 100 and a radio frequency unit 200. When the baseband unit 100 and the radio frequency unit 200 exchange data frames of the CPRI protocol, the baseband unit 100 or the radio frequency unit 200 will be within the data frame of the CPRI protocol. The Ethernet data frame is extracted and sent to a capture device external to the baseband unit 100 or the radio frequency unit 200.

The baseband unit 100 and/or the radio frequency unit 200 are the apparatus 300 for obtaining an Ethernet data frame as shown in FIG. 7, and the working principle and structure are the same, and details are not described herein again.

The above description is only a preferred embodiment of the present invention, and thus does not limit the scope of the patent of the present invention. All equivalent structural or equivalent flow changes made by the present specification and the drawings are directly or indirectly applied to other related technical fields, and are included in the scope of patent protection of the present invention.

Claims

Claim

A method for obtaining an Ethernet data frame, comprising:

The baseband unit and the radio frequency unit extract the CPRI protocol data intraframe Ethernet data frame and transmit it to the baseband unit or the radio frequency unit while interacting with the common public radio interface CPRI protocol data frame. Capture device.

2. The method according to claim 1, wherein the baseband unit and the radio frequency unit extract the data frame of the CPRI protocol data frame while the CPRI protocol data frame is being exchanged. And transmitting to the capture device externally connected to the baseband unit or the radio frequency unit includes:

Transmitting the Ethernet data frame to an external interface module other than the CPRI protocol interface while the central processing unit CPU module of the baseband unit or the radio frequency unit sends the Ethernet data frame to the CPRI protocol module; or the CPU module receives the CPRI The Ethernet data frame is forwarded to the external interface module at the same time as or after the Ethernet data frame sent by the protocol module; the external interface module sends the Ethernet data frame to the capture device.

3. The method according to claim 2, wherein the transmitting, by the CPU module, the Ethernet data frame to the CPRI protocol module, the transmitting the Ethernet data frame to the external interface module comprises:

And transmitting, by the CPU module, the Ethernet data frame to the CPRI protocol module, copying the Ethernet data frame, and sending the copied Ethernet data frame to the external interface module; or

The method of claim 2, wherein the transmitting, by the CPU module, the Ethernet data frame to the external interface module after receiving the Ethernet data frame sent by the CPRI protocol module comprises: Receiving, by the CPU module, the Ethernet data frame sent by the CPRI protocol module, copying the Ethernet data frame, and transmitting the copied Ethernet data frame to the external interface module; or

5. An apparatus for obtaining an Ethernet data frame, comprising: a central processing unit CPU module, a general public wireless interface CPRI protocol module, and an external interface module other than the CPRI protocol interface, wherein

Sending the Ethernet data frame to the external interface module simultaneously or after the CPU module sends the Ethernet data frame to the CPRI protocol module; or the CPU module receives the Ethernet data frame sent by the CPRI protocol module at the same time or after, and forwards the Describe the Ethernet data frame to the external interface module;

The device according to claim 5, wherein the external interface module is an Ethernet interface module or a serial communication interface module.

The device according to claim 5 or 6, wherein the CPU module is further configured to:

Copying the Ethernet number while receiving the Ethernet data frame sent by the CPRI protocol module Sending the copied Ethernet data frame to the external interface module according to the frame; or, after receiving the Ethernet data frame sent by the CPRI protocol module, sending the Ethernet data frame to the external Interface module.

A base station, comprising a baseband unit and a radio frequency unit, wherein the baseband unit and the radio frequency unit are configured to exchange a CPRI protocol data intraframe Ethernet while interacting with a CPRI protocol data frame. The data frame is extracted and sent to a capture device external to the baseband unit or radio frequency unit.

The base station according to claim 9, wherein the baseband unit and/or the radio frequency unit are the apparatus according to any one of claims 5 to 8.