WO2013127321A1

WO2013127321A1 - Base band switching device and switching method thereof

Info

Publication number: WO2013127321A1
Application number: PCT/CN2013/071870
Authority: WO
Inventors: 邓猛; 马卫国
Original assignee: 电信科学技术研究院
Priority date: 2012-02-29
Filing date: 2013-02-26
Publication date: 2013-09-06
Also published as: CN102594829A; CN102594829B

Abstract

Embodiments of the present invention relate to the technical field of wireless communication, and in particular to a base band switching device and a switching method of the base band switching device, which are used for solving the problem existing in the prior art that a base band unit cannot be connected to a test device, thereby restricting the development time of the base band unit, and increasing the difficulty in positioning an erroneous unit after an error occurs. The base band switching device in an embodiment of the present invention comprises a base band data conversion module for converting base band data received from a device to be tested through a wireless base band interface module into an interface protocol of the test device, and transmitting the interface protocol to the test device through a test base band interface module, and converting base band data received from the test device through the test base band interface module into an interface protocol of the device to be tested, and transmitting the interface protocol to the device to be tested through the wireless base band interface module. Since the base band unit can be connected to the test device, the development time of the base band unit is shortened, and the difficulty in positioning the erroneous unit after an error occurs is reduced.

Description

Baseband transfer device and method for transferring the same The present application is filed on the Chinese Patent Office on February 29, 2012. The application number is 201210050861.1, and the invention name is

The priority of the Chinese Patent Application, the entire disclosure of which is incorporated herein by reference.

The present invention relates to the field of wireless communication technologies, and in particular, to a baseband switching device and a method for performing the same. Background technique

In the process of developing wireless communication devices, in order to speed up the development process, many test instruments are needed to test the devices or parts of the devices under development, including function verification, performance testing, and error location. Commonly used test instruments include frequency analyzers, signal analyzers, signal sources, oscilloscopes, channel simulators, and the like.

The common connection method of the current wireless communication device using the test instrument is mainly to connect the radio frequency interface (antenna interface) of the remote radio unit (RRU) of the base station to the radio interface of the test instrument through the radio frequency cable, and the connection method is as shown in FIG. 1A. .

The wireless communication device is mainly composed of a baseband unit (BBU) and a radio frequency unit. During the development of the device, the baseband unit and the radio frequency unit are respectively developed and tested, and then the joint test is performed. Testing and verification of equipment requires the use of test equipment for testing. Since the standard interface of the more commonly used test instruments on the market is the RF signal interface, the current wireless communication equipment should be tested using these general test instruments. It can be tested after both the baseband unit and the RF unit have been developed.

The baseband signal interface of the universal test instrument currently on the market cannot be directly connected to the baseband signal interface of the baseband unit. Before the radio unit is not developed, the baseband unit of the base station has no way to test it separately using a universal test instrument, and the baseband is verified in advance. The functional correctness of the unit limits the development time of the baseband unit. Moreover, when the baseband unit and the radio unit are tested together, once an error (BUG) occurs, it takes a long time to determine which unit the error is caused, which increases the difficulty of the problem location.

In summary, in the current measurement mode, only the RF unit and the test device are connected, and the baseband unit cannot be connected to the test device, thereby limiting the development time of the baseband unit, and increasing the difficulty of locating the error unit after an error occurs. SUMMARY OF THE INVENTION A baseband switching device and a method for performing the same according to embodiments of the present invention are provided to solve the problem that the baseband unit existing in the prior art cannot be connected to the testing device, thereby limiting the development time of the baseband unit and appearing Increase after error Added the difficulty of locating the wrong unit.

A baseband switching device provided by an embodiment of the present invention includes:

a baseband data conversion module, configured to convert baseband data from the device under test received by the wireless baseband interface module into an interface protocol of the test device, and send the converted baseband data to the test device through the test baseband interface module, and pass the test The baseband data received by the baseband interface module is converted into an interface protocol of the device under test, and the converted baseband data is sent to the device under test through the wireless baseband interface module;

The wireless baseband interface module is configured to forward the transmitted baseband data between the baseband data conversion module and the device under test; and the test baseband interface module is configured to forward the transmitted baseband data between the baseband data conversion module and the test device. A baseband switching device provided by an embodiment of the present invention includes:

The baseband data conversion module is configured to convert the baseband data received through the internal interface module into an interface protocol of the peer device, and send the converted baseband data to the peer device through the external interface module, and the received data received through the external interface module The baseband data of the peer device is converted into an internally supported interface protocol, and the converted baseband data is sent through the internal interface module;

An external interface module, configured to forward the transmitted baseband data between the baseband switching device and the peer device.

A method for performing baseband digital signal switching according to an embodiment of the present invention includes:

Transmitting the received baseband data from the device under test into an interface protocol of the test device, and transmitting the converted baseband data to the test device;

The received baseband data from the test device is converted into an interface protocol of the device under test, and the converted baseband data is transmitted to the device under test.

Since the baseband unit can be connected to the test equipment, the development time of the baseband unit is shortened, and the difficulty of locating the wrong unit after the error is reduced;

Further, the recent connection method requires that the test instrument must have a radio frequency unit, thereby increasing the cost of the test instrument and increasing the cost of using the test instrument by the equipment manufacturer. Since the embodiment of the present invention can realize the transmission of the baseband signal between the test instrument and the device under test, the cost of the test instrument is reduced. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1A is a schematic diagram of a baseband signal connection in the background art; FIG.

1B is a schematic diagram of a baseband signal connection according to an embodiment of the present invention;

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

3 is a schematic structural diagram of a second baseband switching device according to an embodiment of the present invention;

4 is a schematic structural diagram of a third baseband switching device according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a device under test according to an embodiment of the present invention; FIG. 6 is a schematic structural diagram of a test device according to an embodiment of the present invention;

FIG. 7 is a schematic flow chart of a method for performing baseband digital signal switching according to an embodiment of the present invention. The baseband data conversion module in the baseband switching device of the embodiment of the present invention converts the baseband data from the device under test received by the wireless baseband interface module into an interface protocol of the test device, and sends the test to the test device through the test baseband interface module. The converted baseband data, and the interface protocol for converting the baseband data from the test device received by the test baseband interface module into the device under test, and transmitting the converted baseband data to the device under test through the wireless baseband interface module. Since the baseband unit can be connected to the test equipment, the development time of the baseband unit is shortened, and the difficulty of locating the wrong unit after the error is reduced is reduced.

In implementation, the signal transmitted between the device under test and the baseband switching device is a baseband digital signal; and/or the signal transmitted between the test device and the baseband switching device is a baseband digital signal;

Correspondingly, the baseband switching device obtains baseband data from the baseband digital signal.

The embodiments of the present invention are further described in detail below with reference to the accompanying drawings.

As shown in FIG. 1B, in the baseband signal connection diagram of the embodiment of the present invention, the baseband switching device is connected to the device under test through a plurality of optical fibers or other data lines; and is connected to the test device through the data line. The baseband switching device of the embodiment of the present invention can be connected to a time division duplex (TDD) mode wireless communication device, and can also be connected to a frequency division duplex (FDD) mode wireless communication device, and can simultaneously It supports full-duplex mode and supports connection of wireless communication devices with multi-antenna function. At this time, the baseband data has multiple channels of data, and each channel corresponds to the data of one antenna.

As shown in FIG. 2, a first baseband switching device according to an embodiment of the present invention includes: a baseband data conversion module 20, a wireless baseband interface module 21, and a test baseband interface module 22.

The baseband data conversion module 20 is configured to convert the baseband data from the device under test received by the wireless baseband interface module 21 into an interface protocol of the test device, and send the converted baseband data to the test device by testing the baseband interface module 22, and Converting the baseband data from the test device received by the test baseband interface module 22 into an interface protocol of the device under test, and transmitting the converted baseband data to the device under test through the wireless baseband interface module 21; the wireless baseband interface module 21, for Forwarding the transmitted baseband data between the baseband data conversion module 20 and the device under test;

The test baseband interface module 22 is configured to forward the transmitted baseband data between the baseband data conversion module 20 and the test equipment.

The baseband data conversion module 20 of the embodiment of the present invention may be a programmable device or a dedicated integrated circuit (ASIC), such as a Field-Programmable Gate Array (FPGA) module. Digital Signal Processor (DSP) module.

Preferably, the protocols supported by the wireless baseband interface module 21 include, but are not limited to, the following protocols:

Time Division Synchronous Code Division Multiple Access Digital Cellular Mobile Communication Network Distributed Base Station IR (TD-SCDMA IR) Interface Protocol, Common Public Radio Interface (CPRI) Protocol, China Communications Standards Association (CCSA) Defined Time Division Synchronous Code Division Multiple Access Long Term Evolution Digital Cellular Mobile Communication Network Distributed Base Station IR (TD-LTE I) interface protocol, interface protocol between mobile terminal baseband and radio frequency IC (DigRF interface protocol), connection C-RA The PCIe interface of the DU device and the baseband unit of the wireless communication device and other interface protocols of the radio unit.

Preferably, the protocols supported by the test baseband interface module 22 include, but are not limited to, the following protocols:

Small Computer System Interface (SCSI) protocol and Z-DOK+ interface protocol.

The test baseband interface module 22 can be any of the commonly used short-range digital signal transmission interfaces, and can be serial or parallel. In the implementation, the corresponding matching interface can be selected according to the type of interface supported by the test instrument.

Preferably, the transmit function and the receive function in the test baseband interface module 22 can also be divided into two modules. Specifically, as shown in FIG. 3, the test baseband interface module 22 may further include: a test baseband output interface module 220 and a test baseband input interface module 221.

The test baseband output interface module 220 is configured to transmit data of the baseband data conversion module 20 to the test device; and the test baseband input interface module 221 is configured to transmit data of the test device to the baseband data conversion module 20. Preferably, the baseband data conversion module 20 converts the baseband data from the device under test into a protocol supported by the test device interface according to the conversion parameter, and converts the baseband data from the test device into the interface of the device under test according to the conversion parameter. protocol.

The interface protocol of the device under test is CPRI protocol, and the support protocol of the test device interface is the SCSI protocol. The function of the baseband data conversion module 20 is described in detail.

It should be noted that the conversion between other protocols is similar to the conversion between the CPRI protocol and the SCSI protocol, and will not be described here.

The baseband data conversion module 20 parses the data in the control and management (Control & Management, C&M) channel and the S channel and the I/Q data in the baseband data received through the wireless baseband interface module according to the conversion parameters; /Q data is divided into multiple groups, wherein each group of data belongs to the same RF channel; for a group of data, the group of data is sent through the corresponding interface in the test baseband interface module;

According to the conversion parameters, the baseband data received by each interface in the test baseband interface module is composed of I/Q data; the data in the C&M channel and the S channel is filled according to the CPRI protocol data format; and the C&M channel and the S channel are Data and I/Q data are sent through the tested baseband interface module.

Preferably, the conversion parameters used by the baseband data conversion module 20 include, but are not limited to, some or all of the following information. Department:

The number of antennas of the device under test, the interface rate of each protocol, the base station side or the terminal side.

Specifically, the CPRI protocol data link layer (layer 2) provides three data service interfaces: S AP!Q, SAP _CM and SAP _S , SAP _CM and SAP _S interfaces are also called C&M channels, S channels. SAP _IQ is a business data interface through which business data is sent and received. SAP _CM is a control and management data interface through which data that is controlled and managed is sent and received. SAP _S is a synchronous data interface, CPRI interface. The devices at both ends synchronize the data that needs to be transmitted and send and receive through the service interface.

The data of the SAP _IQ data interface is arranged as follows: ( ^I , ^Q)1 . , ^(I , ^Q) » , ^(Ι , ^Q) o , ^(Ι , ^Q) ° , (1, Q) (1, Q)^ (1, Q) , (1, Q), (1, Q) ; (1, Q)^ (1, Q) (1, 0) (1, Q) (ι, Q)i , (i, Q, (i, Q)l, (i, Q), (i, Q), ..., (i, Q), ... where (!, Q)^ represents a pair of I, Q data of the a-th RF channel, and a represents the RF channel of the wireless device Sequence number (assuming K a < 8), each pair (1, data, containing two integer data of LQ, the bit width M of each data (specifically, the size of M can be selected as needed).

Taking M=l 5 as an example, dividing the I/Q data into multiple groups includes:

First, the data of the SAP _IQ data interface of the CPRI protocol is divided into eight parts. For details, see Table 1.

Then, the baseband data conversion module 20 outputs 8 pieces of data to the test baseband interface module 22, and each part of the data corresponds to one SCSI.

In the correspondence between the data bit and the SCSI pin, since each data is composed of M bits, each pair and ^Q data have 2*M bits, which are expressed as In, I M-2, I M-3 '> 2, I 1 ' 1 (1, QM-1, QM-2, QM-3 ', Q ₂ , Q _lt Qoo Generally, the number of pins used to transmit data by the SCSI interface is not less than 2*M, if The number of pins is more than (1, the number of bits of Q (the number of bits here represents the total number of bits of a pair of I/Q data, and here is assumed to be 2M), then the two data of I and Q are separately symbol-expanded so that The number of bits is equal to the number of pins. The correspondence between data bits and SCSI pins is shown in Table 2 (S indicates symbolic data of sign extension).

It should be noted that Table 2 is only an example. As long as it can ensure that each bit of data can have at least one pin corresponding, the correspondence between any data bit and SCSI pin is applicable to the embodiment of the present invention.

The process of converting the SCSI data format into the CPRI data format is the inverse process described above. For the data in the C&M channel and the S channel, the baseband data conversion module 20 needs to be filled according to the data format of the CPRI, and the filled content can be set, for example, It is the control and management data required by the CPRI protocol, or the feedback data required by the CPRI protocol process, or any other data; the CPRI data format can be found in the CPRI Specification V4.2 protocol.

The first RF channel data (i, Q) o , (i, Q); , (i, Q) ' ₂ , , (i, Q)i , the second RF channel data (i, Q) o , ( i, Q)i , (i, Q) , , (i, Q)^ , The third RF channel data (1, (3⁄4, (1, (1, Q) ³ ₂ , , (1, Q, the fourth RF channel data (1, Q), (1, Q, (1, Q) ) , , (1, Q) The fifth RF channel data (1, Q) (1, Q), (1, Q) ⁵ ₂ , , (1, QY _{n the} sixth RF channel data (l, Q) , (i, Q) , (i, Q) , , (i, Q)^ ,

The seventh RF channel data (1, Q), (1, Q), (1, Q);, , (1, Q) l the eighth RF channel data (1, Q), (1, (3⁄4, (1, (3⁄4, , (1, (3⁄4 ,

Table 1

Table 2

Preferably, the conversion parameters used by the baseband data conversion module 20 may be pre-stored in the baseband data conversion module 20; or may be set as needed.

If the setting is made, specifically, as shown in FIG. 4, the third baseband switching device of the embodiment of the present invention includes: a control and synchronization module 23.

The control and synchronization module 23 is configured to configure a conversion parameter for the baseband data conversion module 20 according to the configuration information. In the implementation, the tester inputs configuration information including the conversion parameters to the control and synchronization module 23 through the human-machine interface. After receiving the configuration information, the control and synchronization module 23 can configure the conversion parameters for the baseband data conversion module 20.

Preferably, if the configuration information includes an interface protocol supported by the device under test and an interface protocol supported by the test device, the control and synchronization module 23 is further configured to configure, for the baseband data conversion module 20, the interface of the device under test according to the configuration information. Protocol and protocol supported by the interface of the test device; correspondingly, the baseband data conversion module 20 performs baseband data transfer Before the change, the protocol supported by the interface of the device under test and the test device is determined according to the configuration information.

Preferably, the control and synchronization module 23 can synchronize according to the synchronization data (ie, the data in the S channel) in the baseband data received by the baseband data conversion module 20 through the wireless baseband interface module;

The control and synchronization module 23 can also synchronize according to the synchronization signal received via the synchronization interface.

The baseband switching device of the embodiment of the present invention may further include a built-in power module for supplying power to the baseband switching device; and the baseband switching device may be directly powered by the external power source.

In an implementation, the baseband switching device of the embodiment of the present invention may be a device under test or a test device.

Correspondingly, the baseband data conversion module 20 converts the baseband data received by the internal interface module into an interface protocol of the peer device, and transmits the converted baseband data to the peer device through the external interface module, and receives the received baseband module through the external interface module. The baseband data from the peer device is converted into an internally supported interface protocol, and the converted baseband data is sent through the internal interface module;

If the baseband switching device is a device under test, the peer device is a test device, and the external interface module is a test baseband interface module 21, as shown in FIG. 5;

If the baseband switching device is a test device, the peer device is a device under test, and the external interface module is a wireless baseband interface module 22 as shown in FIG.

Correspondingly, the baseband data conversion module 20 converts the baseband data received through the internal interface module into an interface protocol of the peer device according to the conversion parameter, and converts the baseband data from the opposite device received through the external interface module according to the conversion parameter. An internally supported interface protocol.

Correspondingly, if the baseband switching device is a device under test, and the external interface module is a SCSI protocol;

The baseband data conversion module 20 parses the data in the C&M channel and the S channel and the I/Q data in the baseband data received through the internal interface module according to the conversion parameters; and divides the I/Q data into a plurality of groups according to the conversion parameters, wherein each The group data belongs to the same RF channel; for a group of data, the group of data is sent through the corresponding interface in the external interface module; and the baseband data received through each interface in the external interface module is composed of I/ according to the conversion parameter. Q data; fills the data in the C&M channel and the S channel according to the CPRI protocol data format; and sends the data in the C&M channel and the S channel and the I/Q data through the internal interface module.

Correspondingly, if the baseband switching device is a test device, and the external interface module is a CPRI protocol; the baseband data conversion module 20 parses the data in the C&M channel and the S channel in the baseband data received through the external interface module according to the conversion parameter, and /Q data; according to the conversion parameters, the I/Q data is divided into multiple groups, wherein each group of data belongs to the same RF channel; for a group of data, the group of data is sent through the corresponding interface in the internal interface module; The parameter, the baseband data received through each interface in the internal interface module is composed of I/Q data; the data in the C&M channel and the S channel is filled according to the CPRI protocol data format; and the data in the C&M channel and the S channel and I /Q data is sent via the external interface module. Correspondingly, the control and synchronization module 23 configures the conversion parameters for the baseband data conversion module 20 according to the configuration information; correspondingly, if the baseband switching device is the device under test, the control and synchronization module 23 configures the baseband data conversion module according to the configuration information. The protocol supported by the interface of the test device;

If the baseband switching device is a test device, the control and synchronization module 23 configures the protocol supported by the interface of the device under test for the baseband data conversion module based on the configuration information.

The current connection method can only directly test and measure the RF signal of the device under test, and cannot directly test and measure the baseband signal of the device under test. This makes the test measurement of the baseband unit equipment affected by the development progress of the RF unit, which affects the development cycle of the product to some extent. Since the embodiment of the present invention can realize the connection between the baseband unit and the test equipment, the development time of the baseband unit is shortened

The current connection method cannot test and measure the baseband unit separately. It can only test and measure the whole baseband unit and the RF unit. It can not effectively locate the error or deviation and increase the test positioning time. Since the embodiment of the present invention enables the baseband unit to be connected to the test equipment, it is difficult to locate the wrong unit after an error occurs.

The former connection method requires that the test instrument must have a radio frequency unit, thereby increasing the cost of the test instrument and increasing the cost of using the test instrument by the equipment manufacturer. Since the embodiment of the present invention can realize the transmission of the baseband signal between the test instrument and the device under test, the cost of the test instrument is reduced.

Based on the same inventive concept, a method for performing the handover is also provided in the embodiment of the present invention. The principle of solving the problem is similar to the baseband switching device in the embodiment of the present invention. Therefore, the implementation of the method can be referred to the implementation of the device. The repetitions are not repeated here.

As shown in FIG. 7, the method for performing handover in the embodiment of the present invention includes the following steps:

Step 701: Convert the received baseband data from the device under test into an interface protocol of the test device, and send the converted baseband data to the test device;

Step 702: Convert the received baseband data from the test device into an interface protocol of the device under test, and send the converted baseband data to the device under test.

There is no necessary timing relationship between the step 701 and the step 702. If the baseband data of the device under test is received, step 701 is performed. If the baseband data of the test device is received, step 702 is performed. That is to say, step 701 and step 702 may be performed simultaneously, or step 701 may be performed first, or step 702 may be performed first.

Preferably, in step 701, the baseband data from the device under test is converted into a protocol supported by the test device interface according to the conversion parameter;

Preferably, in step 702, the baseband data from the test device is converted into a protocol supported by the device under test interface according to the conversion parameter.

If the interface protocol of the device under test is the CPRI protocol, the support protocol of the test device interface is the SCSI protocol: Preferably, in step 701, the received C&M channel and the S channel in the baseband data from the device under test are parsed according to the conversion parameters. Data in and I/Q data; according to conversion parameters, I/Q data is divided into groups, each of which The data belongs to the same RF channel; each set of data is sent to the test equipment separately.

If the interface protocol of the device under test is the CPRI protocol, the support protocol of the test device interface is the SCSI protocol: Preferably, in step 701, the received sets of data from the test device are combined into I/Q data according to the conversion parameters; The data in the C&M channel and the S channel are filled according to the CPRI protocol data format; the data in the C&M channel and the S channel and the I/Q data are sent to the device under test.

Preferably, the method further includes:

Synchronizing according to the received synchronization data in the baseband data from the device under test; or

Synchronization is based on the received sync signal.

Those skilled in the art will appreciate that embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer usable program code.

The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the invention. It will be understood that each process and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

Although the preferred embodiment of the invention has been described, it will be apparent to those skilled in the art that <RTIgt; </ RTI> <RTIgt; Therefore, the appended claims are intended to be construed as including the preferred embodiments and the modifications

It is apparent that those skilled in the art can make various modifications and variations to the embodiments of the present invention without departing from the spirit and scope of the embodiments of the present invention. Thus, if such modifications and variations of the embodiments of the invention are within the scope of the invention The present invention is also intended to cover such modifications and variations within the scope of the equivalents.

Claims

Rights request

A baseband switching device, characterized in that the device comprises:

The wireless baseband interface module is configured to forward the transmitted baseband data between the baseband data conversion module and the device under test; and the test baseband interface module is configured to forward the transmitted baseband data between the baseband data conversion module and the test device.

2. The device according to claim 1, wherein the test baseband interface module comprises: a test baseband output interface module, configured to transmit data of the baseband data conversion module to the test device; and test the baseband input interface module, The data of the test device is transmitted to the baseband data conversion module.

The device according to claim 1, wherein the baseband data conversion module is specifically configured to: convert baseband data from the device under test into a protocol supported by the test device interface according to the conversion parameter, and according to the The conversion parameters convert the baseband data from the test equipment into a protocol supported by the device under test interface.

4. The device according to claim 3, wherein the protocol supported by the wireless baseband interface module comprises: a time division synchronous code division multiple access digital cellular mobile communication network distributed base station IR interface protocol, a general public wireless interface CPRI protocol Time-division synchronous code division multiple access long-term evolution digital cellular mobile communication network distributed base station IR interface protocol defined by China Communications Standards Association CCSA, interface protocol between baseband and radio frequency IC of mobile terminal, and PCIe of DU equipment connected to C-RAN Interface

The protocols supported by the test baseband interface module include: Small computer system interface SCSI protocol and Z-DOK+ interface protocol.

The device according to claim 4, wherein the interface protocol of the device under test is a CPRI protocol, and the support protocol of the test device interface is a SCSI protocol;

The baseband data conversion module is specifically configured to:

Decompose the data in the control and management channels and the S channel and the I/Q data in the baseband data received through the wireless baseband interface module according to the conversion parameters; and divide the I/Q data into multiple groups according to the conversion parameters, wherein each group of data Belong to the same RF channel; for a set of data, send the set of data through the corresponding interface in the test baseband interface module;

According to the conversion parameters, the baseband data received by each interface in the test baseband interface module is composed of I/Q data; the data in the C&M channel and the S channel is filled according to the CPRI protocol data format; and the C&M channel and the S channel are Data and I/Q data are sent via the wireless baseband interface module.

The device according to any one of claims 3 to 5, wherein the device further comprises:

a control and synchronization module, configured to configure a conversion parameter for the baseband data conversion module according to the configuration information;

The device according to claim 6, wherein the control and synchronization module is further configured to: configure, according to the configuration information, a protocol supported by the interface of the device under test and an interface of the test device for the baseband data conversion module Supported agreements.

The baseband data conversion module is further configured to:

Before performing baseband data conversion, determine the protocol supported by the interface of the device under test and the test device according to the configuration information.

The device according to claim 6, wherein the control and synchronization module is further configured to: perform synchronization according to synchronization data in baseband data received by the baseband data conversion module through the wireless baseband interface module; or

Synchronization is based on the received sync signal.

9. The device according to any one of claims 15 to 5, wherein the signal transmitted between the device under test and the baseband switching device is a baseband digital signal; and/or

The signal transmitted between the test device and the baseband switching device is a baseband digital signal.

10. A baseband switching device, the device comprising:

The device according to claim 10, wherein, if the baseband switching device is a device under test, the peer device is a test device, and the external interface module is a test baseband interface module;

If the baseband switching device is a test device, the peer device is a device under test, and the external interface module is a wireless baseband interface module.

12. The device according to claim 11, wherein the test baseband interface module comprises: a test baseband output interface module, configured to transmit data of the baseband data conversion module to the test device; and test the baseband input interface module, The data of the test device is transmitted to the baseband data conversion module.

The device according to claim 11, wherein the protocol supported by the wireless baseband interface module comprises: a time division synchronous code division multiple access digital cellular mobile communication network distributed base station IR interface protocol, a universal public wireless interface

CPRI protocol, time division synchronous code division multiple access long-term evolution digital cellular mobile communication network distributed base station IR interface protocol defined by China Communications Standards Association CCSA, interface protocol between baseband and radio frequency IC of mobile terminal, and DU equipment connected to C-RAN PCIe interface; The protocols supported by the test baseband interface module include: a small computer system interface SCSI protocol and a Z-DOK+ interface protocol.

The device according to claim 10, wherein the baseband data conversion module is specifically configured to: convert the baseband data received through the internal interface module into an interface protocol of the peer device according to the conversion parameter, and The conversion parameter converts the baseband data from the peer device received by the external interface module into an internally supported interface protocol.

The device according to claim 14, wherein if the baseband switching device is a device under test, and the external interface module is a SCSI protocol;

The baseband data conversion module is specifically configured to:

According to the conversion parameters, the data in the C&M channel and the S channel and the I/Q data in the baseband data received through the internal interface module are parsed; according to the conversion parameters, will be! /Q data is divided into groups, wherein each group of data belongs to the same radio frequency channel; for a group of data, the group of data is sent through a corresponding interface in the external interface module;

According to the conversion parameters, the baseband data received through each interface in the external interface module is composed of I/Q data; the data in the C&M channel and the S channel is filled according to the CPRI protocol data format; and the data in the C&M channel and the S channel are And I/Q data is sent through the internal interface module.

The device according to claim 14, wherein if the baseband switching device is a test device, and the external interface module is a CPRI protocol;

The baseband data conversion module is specifically configured to:

According to the conversion parameters, the data in the C&M channel and the S channel and the I/Q data in the baseband data received through the external interface module are parsed; according to the conversion parameters, will be! /Q data is divided into groups, wherein each group of data belongs to the same radio frequency channel; for a group of data, the group of data is sent through a corresponding interface in the internal interface module;

According to the conversion parameters, the baseband data received through each interface in the internal interface module is composed of I/Q data; the data in the C&M channel and the S channel is filled according to the CPRI protocol data format; and the data in the C&M channel and the S channel are And I/Q data is sent through the external interface module.

The device according to any one of claims 14 to 16, wherein the device further comprises: a control and synchronization module, configured to configure a conversion parameter for the baseband data conversion module according to the configuration information;

18. The device according to claim 17, wherein if the baseband switching device is a device under test, the control and synchronization module is further configured to:

And configuring, according to the configuration information, a protocol supported by the interface of the test device for the baseband data conversion module; if the baseband transit device is a test device, the control and synchronization module is further configured to:

According to the configuration information, a protocol supported by the interface of the device under test is configured for the baseband data conversion module.

The device according to claim 17, wherein the control and synchronization module is further configured to: perform the same according to the synchronization data in the baseband data received by the baseband data conversion module through the wireless baseband interface module. Step; or

Synchronization is based on the received sync signal.

20. A method of performing baseband digital signal switching, the method comprising:

The method according to claim 20, wherein the converting the received baseband data from the device under test into an interface protocol of the test device comprises:

Converting baseband data from the device under test into a protocol supported by the test device interface according to the conversion parameter; the interface protocol for converting the received baseband data from the test device into the device under test includes: according to the conversion parameter, The baseband data of the test equipment is converted into a protocol supported by the interface of the device under test.

22. The method according to claim 21, wherein the protocol supported by the wireless baseband interface module comprises:

TD-IR protocol, CPRI protocol, TD-LTE IR interface protocol defined by CCSA, DigRF interface protocol, and PCIe interface of DU device connected to C-RAN;

The protocols supported by the test baseband interface module include: a SCSI interface protocol and a Z-DOK+ interface protocol.

The method according to claim 22, wherein the interface protocol of the device under test is a CPRI protocol, and the support protocol of the test device interface is a SCSI protocol;

The interface protocol for converting the received baseband data from the device under test into a test device includes: parsing data and C/M data and I/Q data in the C&M channel and the S channel in the baseband data from the device under test according to the conversion parameter. ;

According to the conversion parameter, the I/Q data is divided into a plurality of groups, wherein each group of data belongs to the same RF channel; and the transmitting the converted baseband data to the test device includes:

Send each set of data to the test device separately.

The interface protocol for converting the received baseband data from the test device into the device under test includes: forming, according to the conversion parameter, the received plurality of sets of data from the test device into I/Q data;

Filling data in the C&M channel and the S channel according to the CPRI protocol data format;

The sending the converted baseband data to the device under test includes:

Send data from the C&M channel and S channel and I/Q data to the device under test.

The device according to any one of claims 20 to 24, wherein the method further comprises: Synchronizing according to the received synchronization data in the baseband data of the device under test; or synchronizing according to the received synchronization signal.