WO2021227517A1

WO2021227517A1 - Indoor distributed system, data transmission method, and storage medium

Info

Publication number: WO2021227517A1
Application number: PCT/CN2020/140294
Authority: WO
Inventors: 曾宪平; 叶祖铨; 李玉秀
Original assignee: 京信网络系统股份有限公司
Priority date: 2020-05-12
Filing date: 2020-12-28
Publication date: 2021-11-18
Also published as: CN111615074A; CN111615074B

Abstract

The present application relates to an indoor distributed system, a data transmission method, and a storage medium. The indoor distributed system comprises: a BBU unit, a protocol conversion (CB) unit, an extension unit, and a remote unit, wherein the CB unit is in communication connection with the BBU unit and the extension unit respectively; the extension unit is in communication connection with the remote unit; the CB unit is used to respectively perform protocol conversion on data received from the extension unit and the BBU unit, and to send timing information to the BBU unit, wherein the timing information is used to instruct the BBU unit to send downlink data or receive uplink data; and the BBU unit is used to perform data communication with the CB unit according to the timing information and the data subjected to protocol conversion. The indoor distributed system can reduce the cost of the BBU unit, and meet different function requirements of users for the BBU unit.

Description

Indoor distributed system, data transmission method and storage medium

Technical field

This application relates to the field of communication technology, and in particular to an indoor distributed system, a data transmission method, and a storage medium.

Background technique

With the rapid increase of mobile users and more and more high-rise buildings, the traffic density and coverage requirements are also rising. These high-rise buildings are large in scale, and the radio signals of wireless communication are blocked and attenuated in the middle of such high-rise buildings. It is difficult to communicate normally. In the low-rise buildings of large buildings, underground shopping malls, underground parking lots and other environments, there are usually blind areas. The indoor distributed system can use the indoor antenna distribution system to evenly distribute the signal of the mobile base station in every corner of the room, so as to ensure that the indoor area has an ideal signal coverage and better improve the mobile communication environment in the building.

In traditional technology, the indoor baseband processing unit (Building Baseband Unite, BBU) in the indoor distributed system generally uses a dedicated digital baseband chip, and uses the dedicated digital baseband chip to implement protocol conversion of uplink data and downlink data, and receive uplink data And sending downlink data, etc.

However, traditional BBU units using dedicated digital baseband chips usually provide a single manufacturer and a higher price, which greatly increases the cost of the BBU unit; and dedicated digital baseband chips are chips coupled with software and hardware, which have limited functions. , Resulting in more limited user choices.

Summary of the invention

Based on this, it is necessary to use a dedicated digital baseband chip for the traditional technology of the BBU unit, usually a single manufacturer and higher price, which greatly increases the cost of the BBU unit; and the dedicated digital baseband chip is a chip in which software and hardware are coupled together. The realization function is relatively limited, which leads to the problem of relatively limited user choices. An indoor distributed system, data transmission method and storage medium are provided.

In the first aspect, an embodiment of the present application provides an indoor distributed system. The indoor distributed system includes: a BBU unit, a protocol conversion CB unit, an expansion unit, and a remote unit. The CB unit is in communication connection with the BBU unit and the expansion unit, respectively, The expansion unit communicates with the remote unit;

The CB unit is used to perform protocol conversion on the data received from the extension unit and the BBU unit respectively, and to send timing information to the BBU unit; the timing information is used to instruct the BBU unit to send downlink data or receive uplink data;

The BBU unit is used for data communication with the CB unit according to the timing information and the data after the protocol conversion.

In a second aspect, an embodiment of the present application provides a data transmission method, and the data transmission method includes:

The BBU unit receives the timing information sent by the CB unit; the timing information is used to instruct the BBU unit to send downlink data or receive uplink data; the CB unit is also used to perform protocol conversion on the data received from the extension unit and the BBU unit respectively;

The BBU unit sends the downlink IQ data to the CB unit according to the timing information, or receives the uplink IQ data after the protocol conversion sent by the CB unit according to the timing information.

In a third aspect, an embodiment of the present application provides a data transmission method, and the data transmission method includes:

The CB unit performs protocol conversion on the data received from the extension unit and the BBU unit respectively, and sends timing information to the BBU unit; the timing information is used to instruct the BBU unit to send downlink data or receive uplink data;

The CB unit performs data communication with the expansion unit and the BBU unit respectively based on the data after the protocol conversion.

In a fourth aspect, an embodiment of the present application provides a readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the following steps are implemented:

In a fifth aspect, an embodiment of the present application provides a readable storage medium on which a computer program is stored, and when the computer program is executed by a processor, the following steps are implemented:

The indoor distributed system, data transmission method, and storage medium provided by this embodiment. The indoor distributed system includes a BBU unit, a protocol conversion CB unit, an expansion unit, and a remote unit, wherein the CB unit communicates with the BBU unit and the expansion unit respectively Connection, the expansion unit communicates with the remote unit; the CB unit can be used to perform protocol conversion on the data received from the expansion unit and the BBU unit, and to send timing information to the BBU unit; correspondingly, the BBU unit is used for timing The information and the data after the protocol conversion are communicated with the CB unit. In this embodiment, the CB unit can perform protocol conversion on the data received from the extension unit and the BBU unit respectively. The BBU unit does not need to perform protocol conversion on the received uplink data or the transmitted downlink data. It only needs to perform protocol conversion on the basis of timing information and protocol conversion. The data sent to the CB unit or received data from the CB unit, therefore, the BBU unit does not need a dedicated digital baseband chip to realize the various functions of the BBU unit, which greatly reduces the cost of the BBU unit; in addition, the BBU unit can receive the implementation of the user installation Software with different functions, and each software can be decoupled, and each software and the processor of the BBU unit can also be decoupled from software and hardware, providing users with more choices and meeting users' different functional requirements for the BBU unit.

Description of the drawings

FIG. 1 is a schematic diagram of the structure of an indoor distributed system provided by an embodiment;

2 is a schematic diagram of the internal structure of a BBU unit provided by an embodiment;

FIG. 3 is a schematic flowchart of a data transmission method provided by an embodiment;

4 is a schematic flowchart of a data transmission method provided by another embodiment;

Fig. 5 is a schematic flowchart of a data transmission method provided by another embodiment.

Detailed ways

The data transmission method provided by the embodiments of the present application can be applied to the indoor distributed system as shown in FIG. 1. The indoor distributed system includes a BBU unit 101, a protocol conversion (Converter Box, CB) unit 102, an expansion unit 103, and a remote The unit 104, the CB unit 102 and the BBU unit 101 and the expansion unit 103 may be communicatively connected by optical fiber or network cable, and the expansion unit 103 and the remote unit 104 may be communicatively connected by optical fiber or network cable. Optionally, the CB unit 102 can be connected to multiple extension units 103. For example, the CB unit 102 can be connected to four extension units 103, and each extension unit 103 can be connected to multiple remote units 104. For example, each extension unit 103 can be connected to eight extension units. A remote unit 104. In the uplink, the remote unit 104 can receive the uplink data sent by the user terminal, and convert the received uplink data into in-phase quadrature (IQ) under in-phase and quadrature modulation used for user platform information. Data, and then send the obtained uplink IQ data to the extension unit 103. The extension unit 103 combines the uplink IQ data received from the remote unit 104 and sends it to the CB unit 102, and then transmits it from the remote unit 104 to the CB unit 102. The data are all uplink IQ data of the CPRI protocol. After being transmitted to the CB unit 102, the CB unit 102 can convert the uplink IQ data of the CPRI protocol into the uplink IQ data of the eCPRI protocol and send it to the BBU unit 101. In the downlink, the BBU unit 101 sends the downlink IQ data of the eCPRI protocol to be sent to the CB unit 102, and the CB unit 102 converts the downlink IQ data of the eCPRI protocol into the downlink IQ data of the CPRI protocol and sends it to the extension unit 103 , The extension unit 103 broadcasts the downlink IQ data received from the CB unit 102 to each remote unit 104.

In one embodiment, an indoor distributed system is provided. As shown in Figure 1, the system may include a BBU unit, a protocol conversion CB unit, an extension unit, and a remote unit. The CB unit communicates with the BBU unit and the extension unit, respectively. Connection, the expansion unit communicates with the remote unit; the CB unit is used to perform protocol conversion on the data received from the expansion unit and the BBU unit, and to send timing information to the BBU unit; the CB unit is also used to The monitoring instruction sent by the unit communicates with the BBU unit; timing information is used to instruct the BBU unit to send downlink data or receive uplink data; send target data to the BBU unit; target data includes timing data and IQ data, and IQ data is obtained after CB unit conversion The BBU unit is used to communicate with the CB unit according to the timing information and the data after the protocol conversion; it is also used to send monitoring instructions to the CB unit.

Specifically, the data received by the CB unit from the extension unit is the uplink IQ data of the CPRI protocol, and the data received by the CB unit from the BBU is the downlink IQ data of the eCPRI protocol. The CB unit can be used to perform protocol conversion on the data received from the extension unit and the BBU unit. For example, the CB unit can convert the uplink IQ data of the CPRI protocol received from the extension unit into the uplink IQ data of the eCPRI protocol and send it To the BBU unit, the downlink IQ data of the eCPRI protocol received from the BBU unit can also be converted into the downlink IQ data of the CPRI protocol, and sent to the extension unit. Further, the extension unit can receive uplink IQ data from the remote unit or send downlink IQ data to the remote unit.

The CB unit may also send timing information to the BBU unit, and the timing information may be used to instruct the BBU unit to send downlink data or receive uplink data. Optionally, the CB unit may periodically send timing information to the BBU unit. The CB unit can also send the upstream data after protocol conversion to the BBU unit.

The BBU unit can receive uplink data from the CB unit or send downlink data to the CB unit according to the timing information sent by the CB unit. Optionally, the BBU unit may be a computer device, and the computer device may be an X86 server, a tablet computer, a desktop computer, a personal digital assistant, etc. The specific form of the computer device is not limited in this embodiment. Optionally, the BBU unit can receive user-installed operation and maintenance (Operation Administration and Maintenance, OAM) software, BBU unit driver software, etc., to implement various functions of the BBU unit, such as LTE air interface protocol stack, operation and maintenance functions, and physical Layer functions, etc. Optionally, the software installed on the BBU unit can be decoupled, and the software installed on the BBU unit can also be decoupled from the processor on the BBU unit to provide users with more choices and satisfy users. Different functional requirements for BBU units.

The indoor distributed system provided by this embodiment includes a BBU unit, a protocol conversion CB unit, an expansion unit, and a remote unit. The CB unit is respectively connected to the BBU unit and the expansion unit in communication, and the expansion unit is in communication connection with the remote unit; CB The unit can be used to perform protocol conversion on the data received from the extension unit and the BBU unit respectively, and send timing information to the BBU unit; correspondingly, the BBU unit is used to perform data with the CB unit according to the timing information and the data after the protocol conversion. Communication. In this embodiment, the CB unit can perform protocol conversion on the data received from the extension unit and the BBU unit respectively. The BBU unit does not need to perform protocol conversion on the received uplink data or the transmitted downlink data. It only needs to perform protocol conversion on the basis of timing information and protocol conversion. The data sent to the CB unit or received data from the CB unit, therefore, the BBU unit does not need a dedicated digital baseband chip to realize the various functions of the BBU unit, which greatly reduces the cost of the BBU unit; in addition, the BBU unit can receive the implementation of the user installation Software with different functions, and each software can be decoupled, and each software and the processor of the BBU unit can also achieve software and hardware decoupling, providing users with more choices and meeting users' different functional requirements for the BBU unit.

Fig. 2 is a schematic structural diagram of an indoor distributed system provided by another embodiment. On the basis of the embodiment shown in FIG. 1, the above-mentioned BBU unit may include a direct memory access (Direct Memory Access, DMA) control unit, a data plane development kit (Date Plane Development Kit, DPDK) network card and a CPU; a DMA control unit It is connected with the DPDK network card, and the CPU is respectively connected with the DMA control unit and the DPDK network card.

In this embodiment, the data required by the DMA control unit, DPDK network card, and CPU can all be stored in the memory of the BBU, and the CPU can use the corresponding Application Programming Interface (API) to call the DMA control unit or DPDK network card to execute The operation shown in the following examples. The following describes the operations that the DMA control unit, DPDK network card, and CPU need to perform respectively according to the transmission of IQ data in the uplink and the downlink.

(1) When transmitting downlink IQ data in the downlink

On the basis of the above embodiment, the above timing information is the first interrupt message sent by the CB unit at the Nth time; the first interrupt message carries the first target subframe identifier; the above BBU unit is used to identify the first target subframe On the corresponding downlink subframe, the downlink IQ data is sent to the CB unit, and the downlink IQ data to be sent at time N+1 in the memory space of the BBU unit is stored in the buffer space of the BBU unit.

In this embodiment, the foregoing first interrupt message carries a first target subframe identifier, and the first target subframe identifier may include at least one of a numeric value, a text, and an English letter. For example, the first target subframe identifier may be SF. Or SF1 etc. Further, the first interrupt message is also used to trigger the BBU unit to send downlink IQ data. When the first target subframe identifier corresponds to a downlink subframe or a downlink special subframe, the BBU unit can send downlink IQ data to the CB unit. At the same time, the BBU unit can also execute the underlying software to change the Nth in the memory space of the BBU unit. The downlink IQ data to be sent at time +1 is stored in the buffer space of the BBU unit, and the underlying software is used to store the downlink IQ data to be sent in the memory space of the BBU unit at time N+1 to the buffer space of the BBU unit without affecting The sending of downlink IQ data, that is, sending the downlink IQ data and storing the downlink IQ data to be sent at the next moment are executed by different layers of software, and the two will not affect each other, which improves the accuracy of data transmission; in addition, Using the underlying software to store the downstream IQ data to be sent in the memory space of the BBU unit at time N+1 into the buffer space of the BBU unit, it is convenient for the BBU unit to send the downstream IQ data to the BBU unit quickly. The buffer space reads the downlink IQ data to be sent, and improves the sending efficiency of the downlink IQ data to be sent, so as to improve the real-time requirements of communication. It should be noted that when the downlink IQ data sent by the BBU unit at the Nth time is the N-1th time, the BBU unit stores the data in the buffer space of the BBU unit.

Optionally, the aforementioned Nth time is the corresponding time after the Nth 1PPS minus the preset compensation duration. Further, the preset compensation time length is a time length determined according to the time delay, and the time delay includes at least one of the following: the time delay generated when the network packet corresponding to the IQ data is transmitted between the BBU unit and the CB unit; the IQ data includes downlink IQ data and Uplink IQ data; the inherent delay corresponding to the CB unit, the extension unit and the remote unit, the transmission delay between the CB unit and the extension unit, and the transmission delay between the extension unit and the remote unit. Optionally, the preset compensation duration can be 135us.

Optionally, the above-mentioned DMA control unit is configured to determine the downlink IQ data corresponding to the first target subframe identifier according to the first target subframe identifier; and write the downstream IQ data in the buffer space of the BBU unit into the DPDK network card Network card queue; DPDK network card, used to determine the priority of the downlink IQ data; CPU, used to determine the sending order of the downlink IQ data according to the priority of the downlink IQ data, and send the downlink IQ data when the sending order of the downlink IQ data arrives.

In this embodiment, when the BBU unit initiates the transmission of downlink IQ data, the DMA control unit can automatically write the downlink IQ data corresponding to the first target subframe identifier from the buffer space of the BBU unit into the Data Plane Development Kit (Data Plane Development Kit). Kit, DPDK) The network card queue in the network card is prepared for the BBU unit to send the above-mentioned downlink IQ data. After the DPDK network card determines the priority of the downlink IQ data, it can make the CPU determine the sending order of the downlink IQ data according to the priority of the downlink IQ data, and send the downlink IQ data when the sending order of the downlink IQ data arrives. Optionally, the higher the priority of the downlink IQ data, the higher the sending order.

Optionally, the DPDK network card can determine the priority corresponding to the VLAN ID of the downlink IQ data as the priority of the downlink IQ data according to the VLAN ID of the downlink IQ data. For example, the VLAN ID of the downlink IQ data is 2, and the corresponding priority is If the priority is medium, the DPDK network card can determine the priority of the downlink IQ data as medium priority. Optionally, the timing information sent by the CB unit also has priority. The DPDK network card can determine the priority of the timing information according to the VLAN identifier of the timing information. For example, the VLAN identifier of the timing information is 1, and the corresponding priority is the highest priority. Then the DPDK network card can determine the priority of the timing message as the highest priority. Different data have different priorities, which can facilitate the BBU unit to determine the order of receiving or sending data according to the priorities of different data, and receive or send data with higher priority in a timely manner, which improves the real-time requirements of communication.

Optionally, the CB unit can send the downlink IQ data sent by the received BBU unit to the extension unit, and then the extension unit broadcasts to each remote unit, so that the remote unit converts the received downlink IQ data into radio frequency information. The antenna is launched into the air.

(2) When transmitting uplink IQ data in the uplink

On the basis of the foregoing embodiment, the foregoing timing information is the second interrupt message sent by the CB unit at the M-th time; the second interrupt message carries the second target subframe identifier; the CB unit is also used to send the BBU to the BBU after the M-th time. The unit sends the first uplink IQ data; the BBU unit is used to receive the first uplink IQ data sent by the CB unit, and store the second uplink IQ data in the network card queue of the DPDK network card in the memory space of the BBU unit; the second uplink IQ data It is the uplink IQ data sent by the CB unit received by the BBU unit at time M-1.

In this embodiment, the foregoing second interrupt message carries a second target subframe identifier, and the second target subframe identifier may include at least one of a numeric value, a text, and an English letter. For example, the second target subframe identifier may be SF. Or SF1 etc. Further, the second interrupt message is also used to trigger the BBU unit to receive uplink IQ data. When the second target subframe identifier corresponds to an uplink subframe or an uplink special subframe, the BBU unit can receive the first uplink IQ data from the CB unit. At the same time, the BBU unit can also execute the underlying software to place the DPDK network card in the queue of the network card. The second uplink IQ data is stored in the memory space of the BBU unit; where the second uplink IQ data is the uplink IQ data sent by the CB unit received by the BBU unit at the M-1th time.

Use the underlying software to use the BBU unit to receive the second uplink IQ data sent by the CB unit at time M-1 without affecting the reception of the first uplink IQ data, that is, to receive the first uplink IQ data and store the last received IQ data The second uplink IQ data is executed by different layers of software, and the two will not affect each other, avoiding the conflict between the data stored in the BBU unit and the received data, and improving the accuracy of data transmission; in addition, the BBU unit is replaced by the underlying software. The received uplink IQ data at time M-1 in the memory space of the BBU is stored in the memory space of the BBU unit to complete the reception of the uplink IQ data. This simultaneously receives the first uplink IQ data and stores the second uplink IQ data. Improve the reception efficiency of uplink IQ data to improve the real-time requirements of communication. Optionally, the above-mentioned Mth time is the corresponding time after the Mth 1PPS plus the preset compensation duration.

When the BBU unit sends the downlink IQ data to the CB unit, it is sent in advance with a preset compensation time, and when the BBU unit receives the uplink IQ data sent by the CB unit, it is received after the preset compensation time. This is to achieve air interface alignment. Ensure the continuity of data received and sent by the user terminal.

Optionally, the above-mentioned DPDK network card is used to determine the priority of the first uplink IQ data, and determine the receiving order of the first uplink IQ data according to the priority of the first uplink IQ data, and in the receiving order of the first uplink IQ data Upon arrival, the first upstream IQ data is received; the CPU is also used to write the second upstream IQ data into the buffer space of the BBU unit, and write the second upstream IQ data in the buffer space of the BBU unit into the memory space of the BBU unit.

In this embodiment, when the BBU unit receives the first uplink IQ data, the DPDK network card can determine the priority of the first uplink IQ data, so that the CPU determines the receiving order of the first uplink IQ data according to the priority of the first uplink IQ data , And receive the first uplink IQ data when the receiving sequence of the first uplink IQ data arrives. Optionally, the higher the priority of the first uplink IQ data, the higher the receiving order. Optionally, the priority of all IQ data (including downlink IQ data, downlink IQ data to be sent, first uplink IQ data, and second uplink IQ data, etc.) may be the same. Therefore, the foregoing first uplink IQ data and the foregoing downlink IQ data may have the same priority. The priority of the data can be the same. Further, similar to the above method for determining the priority of the downlink IQ data, the DPDK network card can determine the priority corresponding to the VLAN identification of the first uplink IQ data as the priority of the first uplink IQ data according to the VLAN identification of the first uplink IQ data. Priority, for example, if the VLAN identifier of the first uplink IQ data is 2, and the corresponding priority is medium priority, the DPDK network card can determine that the priority of the first uplink IQ data is medium priority.

Optionally, the first uplink IQ data and the second uplink IQ data sent by the CB unit to the BBU unit are sent from the remote unit to the extension unit, and sent to the CB unit after being combined by the extension unit. Further, the CB unit needs to convert the first uplink IQ data and the second uplink IQ data of the CPRI protocol received from the extension unit into the uplink IQ data of the eCPRI protocol. The BBU may send the first uplink IQ data and the second uplink IQ data received from the CB to the core network through the network.

The above two parts (1) and (2) describe the operations required by the DMA control unit, DPDK network card and CPU when transmitting IQ data in the uplink and downlink. When transmitting IQ data in the downlink, sending the downlink IQ data and storing the downlink IQ data to be sent at the next moment are executed using different layers of software, and the two will not affect each other, which improves the accuracy of data transmission; , Using the underlying software to store the downstream IQ data to be sent in the memory space of the BBU unit at time N+1 to the buffer space of the BBU unit, which can facilitate the BBU unit to quickly send the IQ data to be sent from the BBU unit when it needs to send the downstream IQ data. The buffer space for reading the downlink IQ data to be sent can improve the sending efficiency of the downlink IQ data to be sent, so as to improve the real-time requirements of communication. When transmitting IQ data in the uplink, receiving the first uplink IQ data and storing the second uplink IQ data at the previous moment are executed by different layers of software, and the two will not affect each other, avoiding the BBU unit storing data and The received data conflicts, which improves the accuracy of data transmission; in addition, the underlying software is used to store the uplink IQ data received at the M-1 time in the memory space of the BBU unit into the memory space of the BBU unit to complete the uplink IQ data The reception of the first uplink IQ data and the storage of the second uplink IQ data at the same time can improve the reception efficiency of the uplink IQ data and improve the real-time requirements of communication.

In the indoor distributed system provided by another embodiment, the above-mentioned BBU unit is also used to send monitoring instructions to the CB unit; the CB unit is also used to send monitoring data to the BBU unit according to the monitoring instructions.

In this embodiment, the monitoring instruction may be an instruction instructing the CB unit to send monitoring data to the BBU unit. The above-mentioned monitoring data may include configuration data of various monitoring parameters of the CB unit, read data of various monitoring parameters of the CB unit, upgrade data of the CB unit, restart data of the CB unit, and log collection data of the CB unit At least one of them.

The above-mentioned BBU unit can send monitoring instructions to the CB unit. Correspondingly, the CB unit can use the monitoring system of the CB unit to obtain the monitoring data of the CB unit according to the received monitoring instructions sent by the BBU unit, and send the acquired monitoring data of the CB unit To the BBU unit.

Optionally, the above CPU is used to write monitoring instructions from the memory space of the BBU unit to the buffer space of the BBU unit; the DMA control unit is used to write monitoring instructions from the buffer space of the BBU unit to the network card queue in the DPDK network card; The DPDK network card is used to determine the priority of the monitoring command; the CPU is also used to determine the sending order of the monitoring command according to the priority of the monitoring command, and send the monitoring command when the sending order of the monitoring command arrives.

In this embodiment, the CPU can write the monitoring instructions from the memory space of the BBU unit into the buffer space of the BBU unit, and use the DMA control unit to write the monitoring instructions from the buffer space of the BBU unit into the network card queue in the DPDK network card, so that the CPU sends The CB unit sends a monitoring command to prepare.

When the BBU unit sends a monitoring command, the DPDK network card can determine the priority of the monitoring command, determine the sending order of the monitoring command according to the priority of the monitoring command, and send the monitoring command when the sending order of the monitoring command arrives. Optionally, the higher the priority of the monitoring command, the higher the sending order.

Optionally, the above-mentioned DPDK network card is used to determine the priority of the monitoring data; and determine the receiving order of the monitoring data according to the priority of the monitoring data, and receive the monitoring data when the receiving order of the monitoring data arrives, and write the monitoring data The network card queue of the DPDK network card; the CPU is also used to write monitoring data from the network card queue of the DPDK network card into the buffer space of the BBU unit, and write the monitoring data in the buffer space of the BBU unit into the memory space of the BBU unit.

In this embodiment, the DPDK network card can determine the priority of the monitoring data according to the VLAN ID of the monitoring data and the priority corresponding to the VLAN ID of the monitoring data. For example, the VLAN ID of the monitoring data is 3, and the corresponding priority is the lowest priority. , The DPDK network card can determine the lowest priority among the priorities of monitoring data. Optionally, the priority of the monitoring instruction and the monitoring data are the same.

When the BBU unit receives the monitoring data sent by the CB unit, the DPDK network card can use the priority of the monitoring data to determine the receiving order of the monitoring data, and receive the above monitoring data when the receiving order of the monitoring data arrives, and write the monitoring data to the DPDK network card The network card queue of the DPDK network card allows the CPU to write monitoring data from the network card queue of the DPDK network card into the buffer space of the BBU unit, and write the monitoring data in the buffer space of the BBU unit into the memory space of the BBU unit, thereby completing the receiving of monitoring data.

Optionally, the BBU unit, CB unit, expansion unit, and remote unit can have corresponding monitoring systems. In the downlink, the upper level can send monitoring commands to the next level to obtain the next level of monitoring data , The next level can obtain monitoring data from the corresponding monitoring system according to the received monitoring instruction of the upper level and send the obtained monitoring data to the upper level. For example, the BBU unit sends a monitoring command to the CB unit. The CB unit converts the received monitoring data of the extension unit and the remote unit and the monitoring data of the CB unit into eCPRI protocol monitoring data and sends it to the BBU unit. The CB unit sends monitoring to the extension unit. Instruction, the extension unit sends the monitoring data of the extension unit and the monitoring data received from the remote unit to the CB unit from the extension unit. The data transmission protocol between the CB unit and the extension unit is the business management communication protocol (Business Management Communication Protocol). , BMCP), the expansion unit can send monitoring instructions to the remote unit, and the remote unit writes the acquired monitoring data of the remote unit into the register of the remote unit according to the received monitoring instruction of the expansion unit for the expansion unit to read .

Optionally, the monitoring data of the CB unit, the expansion unit and the remote unit can be maintained by using an operation and maintenance function software in the BBU unit, and the monitoring data of the BBU unit can be maintained by using an operation and maintenance function software to make the BBU unit's The monitoring data operation and maintenance function software and the operation and maintenance function software corresponding to other units including the CB unit, the expansion unit and the remote unit are independent of each other, which is convenient for software decoupling.

In the indoor distributed system provided in this embodiment, the BBU unit may send a monitoring instruction to the CB unit, so that the CB unit sends monitoring data to the BBU unit according to the monitoring instruction. In addition, the DPDK network card can determine the priority of the monitoring instruction and the priority of the monitoring data, so that the BBU unit can send the monitoring instruction according to the determined priority of the monitoring instruction, or receive the monitoring data according to the priority of the monitoring data, so as to realize the priority Different levels of data perform different operations to ensure that high-priority data can be sent or received in time to improve the real-time requirements of communication.

Fig. 3 is a schematic flowchart of a data transmission method provided by an embodiment. This embodiment relates to the communication process between the BBU unit and the CB unit when the data transmitted between the BBU unit and the CB unit is IQ data. As shown in Figure 3, the method may include:

S301: The BBU unit receives timing information sent by the CB unit; the timing information is used to instruct the BBU unit to send downlink data or receive uplink data; the CB unit is also used to perform protocol conversion on the data received from the extension unit and the BBU unit respectively.

Specifically, the data received by the CB unit from the extension unit is the uplink IQ data of the CPRI protocol, and the data received by the CB unit from the BBU unit is the downlink IQ data of the eCPRI protocol. The CB unit can be used to perform protocol conversion on the data received from the extension unit and the BBU unit. For example, the CB unit can convert the uplink IQ data of the CPRI protocol received from the extension unit into the uplink IQ data of the eCPRI protocol and send it To the BBU unit, the downlink IQ data of the eCPRI protocol received from the BBU unit can also be converted into the downlink IQ data of the CPRI protocol, and sent to the extension unit. Further, the extension unit can receive uplink IQ data from the remote unit or send downlink IQ data to the remote unit.

The above timing information is used to instruct the BBU unit to send downlink data or receive uplink data. The BBU unit can receive the timing information periodically sent by the CB unit to the BBU unit. Further, the period for the CB unit to send timing information can be 1 ms.

S302: The BBU unit sends downlink IQ data to the CB unit according to the timing information, or receives uplink IQ data sent by the CB unit after protocol conversion according to the timing information.

Specifically, the BBU unit may receive uplink IQ data from the CB unit or send downlink IQ data to the CB unit according to the timing information sent by the CB unit. Optionally, the BBU unit may be a computer device, and the computer device may be an X86 server, a tablet computer, a desktop computer, a personal digital assistant, etc. The specific form of the computer device is not limited in this embodiment. Optionally, the BBU unit can receive user-installed operation and maintenance (Operation Administration and Maintenance, OAM) software, BBU unit driver software, etc., to implement various functions of the BBU unit, such as LTE air interface protocol stack, operation and maintenance functions, and physical Layer functions, etc. Optionally, the software installed on the BBU unit can be decoupled, and the software installed on the BBU unit can also be decoupled from the processor on the BBU unit to provide users with more choices and satisfy users. Different functional requirements for BBU units.

In the data transmission method provided in this embodiment, the BBU unit can receive the timing information sent by the CB unit, and the CB unit is also used to perform protocol conversion on the data received from the extension unit and the BBU unit. The BBU unit sends the data to the CB unit according to the timing information. Send downlink IQ data, or receive uplink IQ data after protocol conversion sent by the CB unit according to timing information. In this embodiment, the CB unit can perform protocol conversion on the data received from the extension unit and the BBU unit respectively. The BBU unit does not need to perform protocol conversion on the received uplink data or the transmitted downlink data. It only needs to perform protocol conversion on the basis of timing information and protocol conversion. The data sent to the CB unit or received data from the CB unit, therefore, the BBU unit needs a dedicated digital baseband chip to realize the various functions of the BBU unit, which greatly reduces the cost of the BBU unit; in addition, the BBU unit can receive different implementations of user installation Functional software, and each software can be decoupled, and each software and the processor of the BBU unit can also achieve software and hardware decoupling, providing users with more choices and meeting users' different functional requirements for the BBU unit.

In the data transmission method provided by another embodiment, this embodiment relates to the implementation process of the BBU unit sending downlink IQ data to the CB unit according to timing information when IQ data is transmitted in the downlink. On the basis of the foregoing embodiment, the foregoing timing information is the first interrupt message sent by the CB unit at the Nth time; the first interrupt message carries the first target subframe identifier; in the foregoing S302, the "BBU unit is based on the timing "Information sending downlink IQ data to the CB unit" may include: the BBU unit sends the downlink IQ data to the CB unit on the downlink subframe corresponding to the first target subframe identifier according to the first target subframe identifier, and changes the memory of the BBU unit The downlink IQ data to be sent at time N+1 in the space is stored in the buffer space of the BBU unit.

Optionally, the above-mentioned BBU unit sends the downlink IQ data to the CB unit on the downlink subframe corresponding to the first target subframe identifier according to the first target subframe identifier, and the implementation process may include: ID, determine the downlink IQ data corresponding to the first target subframe ID; write the downlink IQ data in the buffer space of the BBU unit into the network card queue in the BBU unit; the BBU unit determines the downlink according to the priority of the downlink IQ data in the network card queue IQ data transmission sequence, and downlink IQ data is sent when the downlink IQ data transmission sequence arrives.

In this embodiment, when the BBU unit starts the transmission of downlink IQ data, the BBU unit can automatically write the downlink IQ data corresponding to the first target subframe identifier from the buffer space of the BBU unit into the network card queue in the BBU unit, which is regarded as the BBU. The unit prepares for sending the above-mentioned downlink IQ data.

The BBU unit can determine the priority of the downlink IQ data so that the BBU unit determines the sending order of the downlink IQ data according to the determined priority of the downlink IQ data, and sends the downlink IQ data when the sending order of the downlink IQ data arrives. Optionally, the higher the priority of the downlink IQ data, the higher the sending order.

Optionally, the aforementioned Nth time may be the corresponding time after the Nth 1PPS minus the preset compensation duration. Further, the preset compensation time length is a time length determined according to the time delay, and the time delay includes at least one of the following: the time delay generated when the network packet corresponding to the IQ data is transmitted between the BBU unit and the CB unit; the IQ data includes downlink IQ data and Uplink IQ data; the inherent delay corresponding to the CB unit, the extension unit and the remote unit, the transmission delay between the CB unit and the extension unit, and the transmission delay between the extension unit and the remote unit.

In the data transmission method provided in this embodiment, when IQ data is transmitted in the downlink, the BBU unit can receive the timing information sent by the CB unit, and send downlink IQ data to the CB unit according to the timing information, or receive the CB according to the timing information. Uplink IQ data sent by the unit after protocol conversion. In this embodiment, sending the downlink IQ data and storing the downlink IQ data to be sent at the next moment are executed by different layers of software, and the two will not affect each other, which improves the accuracy of data transmission; in addition, the underlying software is used to The downstream IQ data to be sent at time N+1 in the memory space of the BBU unit is stored in the buffer space of the BBU unit, which can facilitate the BBU unit to quickly read from the buffer space of the BBU unit when it needs to send the downstream IQ data. The downlink IQ data to be sent improves the transmission efficiency of the downlink IQ data to be sent, so as to improve the real-time requirements of communication.

Fig. 4 is a schematic flowchart of a data transmission method provided by another embodiment. This embodiment relates to the implementation process of the BBU unit sending a monitoring instruction to the CB unit and receiving the monitoring data sent by the CB unit according to the monitoring instruction. Based on the foregoing embodiment, optionally, the foregoing data transmission method may further include:

S401: The BBU unit sends a monitoring instruction to the CB unit, and the monitoring instruction is used to obtain monitoring data.

The monitoring instruction may be an instruction instructing the CB unit to send monitoring data to the BBU unit. The above-mentioned monitoring data may include configuration data of various monitoring parameters of the CB unit, read data of various monitoring parameters of the CB unit, upgrade data of the CB unit, restart data of the CB unit, and log collection data of the CB unit At least one of them.

Specifically, the above-mentioned BBU unit can send monitoring instructions to the CB unit regularly or according to a preset cycle, so that the CB unit can use the monitoring system of the CB unit to obtain the monitoring data of the CB unit according to the received monitoring instruction sent by the BBU unit, and Send the acquired monitoring data of the CB unit to the BBU unit.

Optionally, the above-mentioned implementation steps of the BBU unit sending the monitoring instruction to the CB unit may include: the BBU unit writes the monitoring instruction to be sent to the CB unit from the memory space of the BBU unit into the buffer space of the BBU unit, and sends the monitoring instruction from the BBU The buffer space of the unit writes the network card queue in the BBU unit; the BBU unit determines the priority of the monitoring command, and determines the sending order of the monitoring command according to the priority of the monitoring command, and sends the monitoring command when the sending order of the monitoring command arrives.

In this embodiment, the BBU unit can write the monitoring instructions from the memory space of the BBU unit into the buffer space of the BBU unit, and use the monitoring instructions from the buffer space of the BBU unit to write the network card queue in the BBU unit, so that the BBU unit sends the CB to the CB. The unit sends monitoring instructions to prepare. The BBU unit can determine the priority of the monitoring data, determine the sending order of the monitoring commands according to the priority of the monitoring commands, and send the monitoring commands when the sending order of the monitoring commands arrives. Optionally, the higher the priority of the monitoring command, the higher the sending order.

S402: The BBU unit receives the monitoring data sent by the CB unit according to the monitoring instruction.

Specifically, when the BBU unit receives the monitoring data sent by the CB unit, it can use the priority of the monitoring data to determine the receiving order of the monitoring data, and receive the monitoring data when the receiving order of the monitoring data arrives, and write the monitoring data into the BBU The network card queue of the unit, so that the BBU unit writes the monitoring data from the network card queue in the BBU unit into the buffer space of the BBU unit, and writes the monitoring data in the buffer space of the BBU unit into the memory space of the BBU unit, thereby completing the monitoring data Received.

In the data transmission method provided in this embodiment, the BBU unit may send a monitoring instruction to the CB unit, and receive the monitoring data sent by the CB unit according to the monitoring instruction. The BBU unit can determine the priority of the monitoring instruction and the priority of the monitoring data, so that the BBU unit can send the monitoring instruction according to the determined priority of the monitoring instruction, or receive the monitoring data according to the priority of the monitoring data, so as to achieve different priorities Perform different operations on the data to ensure that high-priority data can be sent or received in time to improve the real-time requirements of communication.

Fig. 5 is a schematic flowchart of a data transmission method provided by an embodiment. This embodiment relates to the data communication process between the CB unit and the BBU unit when the CB unit performs protocol conversion on the data received from the extension unit and the BBU unit, and sends timing information to the BBU unit. As shown in Figure 5, the method may include:

S501: The CB unit performs protocol conversion on the data received from the extension unit and the BBU unit respectively, and sends timing information to the BBU unit; the timing information is used to instruct the BBU unit to send downlink data or receive uplink data.

Optionally, the BBU unit may receive the CB unit and may periodically send timing information to the BBU unit. Further, the period for the CB unit to send timing information may be 1 ms.

S502: The CB unit performs data communication with the extension unit and the BBU unit respectively based on the data after the protocol conversion.

Specifically, the CB unit can send the converted downlink IQ data of the CPRI protocol to the extension unit, or receive the uplink IQ data of the CPRI protocol from the extension unit, so as to realize data communication with the extension unit; the CB unit can also convert The obtained uplink IQ data of the eCPRI protocol is sent to the BBU unit, or the downlink IQ data of the eCPRI protocol sent by the BBU unit is received, so as to realize data communication with the BBU unit.

In the data transmission method provided in this embodiment, the CB unit can perform protocol conversion on the data received from the extension unit and the BBU unit respectively, and send timing information to the BBU unit; and the CB unit is based on the protocol-converted data and the extension unit respectively. The unit and the BBU unit carry out data communication. In this embodiment, the CB unit can perform protocol conversion on the data received from the extension unit and the BBU unit respectively. The BBU unit does not need to perform protocol conversion on the received uplink data or the transmitted downlink data. It only needs to perform protocol conversion on the basis of timing information and protocol conversion. The data sent to the CB unit or received data from the CB unit, therefore, the BBU unit needs a dedicated digital baseband chip to realize the various functions of the BBU unit, which greatly reduces the cost of the BBU unit; in addition, the BBU unit can receive different implementations of user installation Functional software, and each software can be decoupled, and each software and the processor of the BBU unit can also achieve software and hardware decoupling, providing users with more choices and meeting users' different functional requirements for the BBU unit.

In the data transmission method provided in another embodiment, the "CB unit sending timing information" in S501 may include: the timing information is the first interrupt message sent by the CB unit at the Nth time; the first interrupt message carries the first target Subframe identifier; the first target subframe identifier is used to instruct the BBU unit to send downlink IQ data to the CB unit on the downlink subframe corresponding to the first target subframe identifier, and set the N+1th time in the memory space of the BBU unit The downstream IQ data to be sent is stored in the buffer space of the BBU unit.

In this embodiment, the foregoing first interrupt message carries a first target subframe identifier, and the first target subframe identifier may include at least one of a numeric value, a text, and an English letter. For example, the first target subframe identifier may be SF. Or SF1 etc. Further, the first interrupt message is also used to trigger the BBU unit to send downlink IQ data. When the first target subframe identifier corresponds to a downlink subframe or a downlink special subframe, the BBU unit can send downlink IQ data to the CB unit. At the same time, the BBU unit can also execute the underlying software to change the Nth in the memory space of the BBU unit. The downlink IQ data to be sent at time +1 is stored in the buffer space of the BBU unit, and the underlying software is used to store the downlink IQ data to be sent in the memory space of the BBU unit at time N+1 to the buffer space of the BBU unit without affecting The sending of downlink IQ data, that is, sending the downlink IQ data and storing the downlink IQ data to be sent at the next moment are executed by different layers of software, and the two will not affect each other, which improves the accuracy of data transmission; in addition, Use the underlying software to store the downstream IQ data to be sent in the memory space of the BBU unit at time N+1 into the buffer space of the BBU unit. The buffer space reads the downlink IQ data to be sent, improves the sending efficiency of the downlink IQ data to be sent, and improves the real-time requirements of communication. It should be noted that when the downlink IQ data sent by the BBU unit at the Nth time is the N-1th time, the BBU unit stores the data in the buffer space of the BBU unit.

Optionally, the aforementioned Nth time is the corresponding time after the Nth 1PPS minus the preset compensation duration. Further, the preset compensation time length is a time length determined according to the time delay, and the time delay includes at least one of the following: the time delay generated when the network packet corresponding to the IQ data is transmitted between the BBU unit and the CB unit; the IQ data includes downlink IQ data and Uplink IQ data; the inherent delay corresponding to the CB unit, the extension unit and the remote unit, the transmission delay between the CB unit and the extension unit, and the transmission delay between the extension unit and the remote unit.

In the data transmission method provided in another embodiment, the "CB unit sending timing information" in S501 may include: the second interrupt message sent by the CB unit at the Mth time; the second interrupt message carries the second target subframe identifier ; The CB unit sends the first uplink IQ data to the BBU unit after the Mth moment; wherein the second target subframe identifier indicates that the BBU unit receives the first uplink IQ sent by the CB unit on the subframe corresponding to the second target subframe identifier The second uplink IQ data in the network card queue of the DPDK network card is stored in the memory space of the BBU unit; the second uplink IQ data is the uplink IQ data sent by the CB unit received by the BBU unit at the M-1th time.

In this embodiment, the foregoing second interrupt message carries a second target subframe identifier, and the second target subframe identifier may include at least one of a numeric value, a text, and an English letter. For example, the second target subframe identifier may be SF. And SF1 etc. Further, the second interrupt message is also used to trigger the BBU unit to receive uplink IQ data. When the second target subframe identifier corresponds to an uplink subframe or an uplink special subframe, the BBU unit can receive the first uplink IQ data from the CB unit. At the same time, the BBU unit can also execute the underlying software to place the DPDK network card in the queue of the network card. The second uplink IQ data is stored in the memory space of the BBU unit; where the second uplink IQ data is the uplink IQ data sent by the CB unit received by the BBU unit at the M-1th time.

Use the underlying software to use the BBU unit to receive the second uplink IQ data sent by the CB unit at time M-1 without affecting the reception of the first uplink IQ data, that is, to receive the first uplink IQ data and store the last received IQ data The second uplink IQ data is executed by different layers of software, and the two will not affect each other, avoiding the conflict between the data stored in the BBU unit and the received data, and improving the accuracy of data transmission; in addition, the BBU unit is replaced by the underlying software. The received uplink IQ data at time M-1 in the memory space of the BBU is stored in the memory space of the BBU unit to complete the reception of the uplink IQ data. This simultaneously receives the first uplink IQ data and stores the second uplink IQ data. Improve the reception efficiency of uplink IQ data to improve the real-time requirements of communication.

Optionally, the above-mentioned Mth time is the corresponding time after the Mth 1PPS plus the preset compensation duration. Further, the preset compensation time length is a time length determined according to the time delay, and the time delay includes at least one of the following: the time delay generated when the network packet corresponding to the IQ data is transmitted between the BBU unit and the CB unit; the IQ data includes downlink IQ data and Uplink IQ data; the inherent delay corresponding to the CB unit, the extension unit and the remote unit, the transmission delay between the CB unit and the extension unit, and the transmission delay between the extension unit and the remote unit.

In the data transmission method provided by another embodiment, the above method may further include: the CB unit receives the monitoring instruction sent by the BBU unit; the monitoring instruction is used to obtain the monitoring data; the CB unit sends the monitoring instruction after protocol conversion to the BBU unit according to the monitoring instruction data.

Specifically, in this embodiment, the monitoring instruction may be an instruction instructing the CB unit to send monitoring data to the BBU unit. The above-mentioned monitoring data may include configuration data of various monitoring parameters of the CB unit, read data of various monitoring parameters of the CB unit, upgrade data of the CB unit, restart data of the CB unit, and log collection data of the CB unit At least one of them.

Optionally, the above-mentioned BBU unit can send monitoring instructions to the CB unit regularly or according to a preset cycle. Correspondingly, the CB unit can use the monitoring system of the CB unit to obtain the monitoring data of the CB unit according to the received monitoring instruction sent by the BBU unit. , And send the acquired monitoring data of the CB unit to the BBU unit.

Optionally, the foregoing monitoring instruction is also used to instruct the CB unit to upgrade, and the data transmission method further includes: the CB unit performs an upgrade operation on the CB unit according to the monitoring instruction.

It should be understood that although the various steps in the flowcharts of FIGS. 2 to 5 are shown in sequence as indicated by the arrows, these steps are not necessarily executed in sequence in the order indicated by the arrows. Unless specifically stated in this article, the execution of these steps is not strictly limited in order, and these steps can be executed in other orders. Moreover, at least part of the steps in FIGS. 2 to 5 may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily executed at the same time, but can be executed at different times. These sub-steps or The execution order of the stages is not necessarily carried out sequentially, but may be executed alternately or alternately with other steps or at least a part of other steps or sub-steps or stages.

In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored, and when the computer program is executed by a processor, the following steps are implemented:

Claims

An indoor distributed system, characterized in that the indoor distributed system includes: a BBU unit, a protocol conversion CB unit, an extension unit, and a remote unit, and the CB unit communicates with the BBU unit and the extension unit, respectively Connected, the expansion unit is communicatively connected with the remote unit;

The CB unit is used to perform protocol conversion on the data received from the extension unit and the BBU unit respectively, and to send timing information to the BBU unit; the timing information is used to instruct the BBU unit to send downlink Data or receive uplink data;

The BBU unit is configured to perform data communication with the CB unit according to the timing information and data after protocol conversion.
The indoor distributed system according to claim 1, wherein the BBU unit includes a DMA control unit, a DPDK network card, and a CPU; the DMA control unit is connected to the DPDK network card, and the CPU is connected to the DMA The control unit is connected with the DPDK network card.
The indoor distributed system according to claim 2, wherein the timing information is a first interrupt message sent by the CB unit at the Nth time; the first interrupt message carries a first target subframe identifier;

The BBU unit is configured to send downlink IQ data to the CB unit on the downlink subframe corresponding to the first target subframe identifier, and to set the waiting time of the N+1 time in the memory space of the BBU unit The sent downlink IQ data is stored in the buffer space of the BBU unit.
The indoor distributed system according to claim 3, wherein the DMA control unit is configured to determine the downlink IQ data corresponding to the first target subframe identifier according to the first target subframe identifier ; And write the downlink IQ data in the buffer space of the BBU unit into the network card queue in the DPDK network card;

The DPDK network card is used to determine the priority of the downlink IQ data;

The CPU is configured to determine the sending sequence of the downlink IQ data according to the priority of the downlink IQ data, and send the downlink IQ data when the sending sequence of the downlink IQ data arrives.
The indoor distributed system according to claim 3, wherein the Nth time is the corresponding time after the Nth 1PPS minus a preset compensation period.
The indoor distributed system according to claim 2, wherein the timing information is a second interrupt message sent by the CB unit at the Mth time; the second interrupt message carries a second target subframe identifier;

The CB unit is further configured to send first uplink IQ data to the BBU unit after the Mth time;

The BBU unit is configured to receive the first uplink IQ data sent by the CB unit, and store the second uplink IQ data in the network card queue of the DPDK network card in the memory space of the BBU unit; The second uplink IQ data is the uplink IQ data sent by the CB unit received by the BBU unit at time M-1.
The indoor distributed system according to claim 6, wherein the DPDK network card is used to determine the priority of the first uplink IQ data, and determine the priority of the first uplink IQ data according to the priority of the first uplink IQ data. Receiving sequence of the first uplink IQ data, and receiving the first uplink IQ data when the receiving sequence of the first uplink IQ data arrives;

The CPU is further configured to write the second uplink IQ data into the buffer space of the BBU unit, and write the second uplink IQ data in the buffer space of the BBU unit into the buffer space of the BBU unit. Memory space.
The indoor distributed system according to claim 6, wherein the M-th time is the corresponding time after the M-th 1PPS plus a preset compensation period.
The indoor distributed system according to claim 5 or 8, wherein the preset compensation time length is a time length determined according to a time delay, and the time delay includes at least one of the following:

The time delay generated when the network packet corresponding to the IQ data is transmitted between the BBU unit and the CB unit; the IQ data includes downlink IQ data and the uplink IQ data;

The respective inherent delays of the CB unit, the extension unit, and the remote unit;

The transmission delay between the CB unit and the extension unit;

The transmission delay between the extension unit and the remote unit.
The indoor distributed system according to claim 2, wherein the BBU unit is further configured to send a monitoring instruction to the CB unit;

The CB unit is further configured to send monitoring data to the BBU unit according to the monitoring instruction.
The indoor distributed system according to claim 10, wherein the CPU is configured to write the monitoring instruction from the memory space of the BBU unit into the buffer space of the BBU unit;

The DMA control unit is configured to write the monitoring instruction from the buffer space of the BBU unit into the network card queue in the DPDK network card;

The DPDK network card is used to determine the priority of the monitoring instruction;

The CPU is further configured to determine the sending order of the monitoring instructions according to the priority of the monitoring instructions, and send the monitoring instructions when the sending order of the monitoring instructions arrives.
The indoor distributed system according to claim 10, wherein the DPDK network card is used to determine the priority of the monitoring data; and to determine the receiving order of the monitoring data according to the priority of the monitoring data, And receiving the monitoring data when the receiving order of the monitoring data arrives, and writing the monitoring data into the network card queue of the DPDK network card;

The CPU is further configured to write the monitoring data from the network card queue of the DPDK network card into the buffer space of the BBU unit, and write the monitoring data in the buffer space of the BBU unit into the BBU The memory space of the unit.
A data transmission method, characterized in that the data transmission method includes:

The BBU unit receives the timing information sent by the CB unit; the timing information is used to instruct the BBU unit to send downlink data or receive uplink data; the CB unit is also used to separate the data received from the extension unit and the BBU unit. Perform protocol conversion;

The BBU unit sends downlink IQ data to the CB unit according to the timing information, or receives uplink IQ data sent by the CB unit after protocol conversion according to the timing information.
The data transmission method according to claim 13, wherein the timing information is a first interrupt message sent by the CB unit at the Nth time; the first interrupt message carries a first target subframe identifier; The BBU unit sending downlink IQ data to the CB unit according to the timing information includes:

The BBU unit sends the downlink IQ data to the CB unit on the downlink subframe corresponding to the first target subframe identifier according to the first target subframe identifier, and stores it in the memory space of the BBU unit The downlink IQ data to be sent at time N+1 is stored in the buffer space of the BBU unit.
The data transmission method according to claim 13, wherein the data transmission method further comprises:

The BBU unit sends a monitoring instruction to the CB unit, where the monitoring instruction is used to obtain monitoring data;

The BBU unit receives monitoring data sent by the CB unit according to the monitoring instruction.
A data transmission method, characterized in that the data transmission method includes:

The CB unit performs protocol conversion on the data received from the extension unit and the BBU unit respectively, and sends timing information to the BBU unit; the timing information is used to instruct the BBU unit to send downlink data or receive uplink data;

The CB unit performs data communication with the extension unit and the BBU unit respectively based on the data after the protocol conversion.
The data transmission method according to claim 16, wherein the sending timing information of the CB unit includes:

The timing information is the first interrupt message sent by the CB unit at the Nth time; the first interrupt message carries a first target subframe identifier; the first target subframe identifier is used to indicate that the BBU unit is On the downlink subframe corresponding to the first target subframe identifier, the downlink IQ data is sent to the CB unit, and the downlink IQ data to be sent at time N+1 in the memory space of the BBU unit is stored in the The buffer space of the BBU unit.
The data transmission method according to claim 16, wherein the sending timing information of the CB unit includes:

A second interrupt message sent by the CB unit at the M-th moment; the second interrupt message carries a second target subframe identifier;

Sending, by the CB unit, the first uplink IQ data to the BBU unit after the Mth time;

Wherein, the second target subframe identifier indicates that the BBU unit receives the first uplink IQ data sent by the CB unit on the subframe corresponding to the second target subframe identifier, and connects the network card of the DPDK network card The second uplink IQ data in the queue is stored in the memory space of the BBU unit; the second uplink IQ data is the uplink IQ data sent by the CB unit received by the BBU unit at the M-1th time.
A computer-readable storage medium having a computer program stored thereon, wherein the computer program implements the steps of any one of claims 13 to 18 when the computer program is executed by a processor.