CN111885617B - Radio remote unit and RRU and BBU networking system - Google Patents
Radio remote unit and RRU and BBU networking system Download PDFInfo
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- CN111885617B CN111885617B CN202011043050.XA CN202011043050A CN111885617B CN 111885617 B CN111885617 B CN 111885617B CN 202011043050 A CN202011043050 A CN 202011043050A CN 111885617 B CN111885617 B CN 111885617B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/18—Network planning tools
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/08—Access point devices
- H04W88/085—Access point devices with remote components
Abstract
The application relates to a remote radio unit and a networking system of RRU and BBU, wherein the remote radio unit comprises an FPGA unit, a digital intermediate frequency unit, a radio frequency unit and a first network interface unit, and the FPGA unit, the digital intermediate frequency unit and the radio frequency unit are sequentially connected; the first network interface unit is connected with the FPGA unit through an RMII interface, and the FPGA unit establishes first communication connection with the baseband processing unit through a CPRI interface; the FPGA unit is used for receiving RMII interface protocol data from the first network interface unit, transmitting the RMII interface protocol data to the CPU unit of the baseband processing unit through the first communication connection, and receiving first response data of the CPU unit of the baseband processing unit responding to the RMII interface protocol data. The method and the device solve the problems of high cost and long software development period of the remote radio unit, and achieve the beneficial effects of reducing the cost of the remote radio unit and shortening the software development period of the remote radio unit.
Description
Technical Field
The application relates to the technical field of communication, in particular to a radio remote unit and a RRU and BBU networking system.
Background
In an existing wireless communication system, a base station (eNB) of an access network generally includes an indoor Baseband processing Unit (BBU) and a Radio Remote Unit (RRU), where the BBU and the RRU are connected by an optical fiber or a cable, and a Common Public Radio Interface (CPRI) or an Open Radio Interface (ORI) protocol is used for data interaction.
Base stations in the existing wireless communication system are mostly formed by a baseband processing unit (BBU) and a plurality of Radio Remote Units (RRUs) in a networking mode, and the base stations are intensively placed in an available central machine room, so that the baseband part can be intensively processed; meanwhile, the radio frequency module in the base station is pulled to the remote radio frequency unit by adopting the optical fiber and is respectively arranged on the station determined by network planning, thereby reducing the requirement of a machine room. Although the existing base station with the base band processing unit BBU matched with the plurality of RRUs for networking can reduce the network construction cost and shorten the network deployment time, the existing RRUs have high cost and long software development period.
At present, no effective solution is provided for the problems of high cost and long software development period of a Radio Remote Unit (RRU) in the related technology.
Disclosure of Invention
The embodiment of the application provides a radio remote unit and a networking system of a RRU and a BBU, and aims to at least solve the problems of high cost and long software development period of the radio remote unit RRU in the related technology.
In a first aspect, an embodiment of the present application provides a remote radio unit, where the remote radio unit includes: the system comprises an FPGA unit, a digital intermediate frequency unit, a radio frequency unit and a first network interface unit, wherein the FPGA unit, the digital intermediate frequency unit and the radio frequency unit are sequentially connected; the first network interface unit is connected with the FPGA unit through an RMII interface, and the FPGA unit is connected with the baseband processing unit through a CPRI interface in a first communication way; the FPGA unit is configured to receive RMII interface protocol data from the first network interface unit, transmit the RMII interface protocol data to the CPU of the baseband processing unit through the first communication connection, and receive first response data of the CPU of the baseband processing unit in response to the RMII interface protocol data.
In some of these embodiments, the remote radio unit does not have a CPU unit.
In some embodiments, the FPGA unit includes a control unit and a digital processing unit, the control unit is connected to the first network interface unit through the RMII interface, the control unit is connected to the digital processing unit, the control unit is further connected to the digital intermediate frequency unit and the radio frequency unit through serial communication, respectively, and the digital processing unit is further connected to the CPRI interface and the digital intermediate frequency unit, respectively; wherein the digital processing unit is at least used for carrying out digital signal processing on the RMII protocol data and the first response data; the control unit is at least used for receiving the RMII protocol data from the first network interface unit, controlling the CPRI interface to be in butt joint transmission with the CPRI interface of the baseband processing unit, controlling the digital processing unit to perform digital signal processing and receiving the first response data subjected to digital signal processing.
In some of these embodiments, the serial communication comprises one of: SPI communication, I communication cancel C communication.
In some embodiments, the remote radio unit further includes a storage unit, and the storage unit is connected to the FPGA unit through serial communication, where the storage unit is configured to store a preset configuration program, and the FPGA unit is further configured to read the preset configuration program from the storage unit through a preset configuration mode.
In some embodiments, the preset configuration mode comprises an active serial configuration mode.
In some embodiments, the remote radio unit further includes a power supply unit electrically connected to the FPGA unit, the digital intermediate frequency unit, and the radio frequency unit; the power supply unit is at least used for supplying power to the FPGA unit, the digital intermediate frequency unit and the radio frequency unit.
In a second aspect, an embodiment of the present application provides a working method of a radio remote unit, including the following steps:
the FPGA unit pulls a preset configuration program stored in the radio remote unit;
the FPGA unit executes a first function according to the preset configuration program, wherein the first function at least comprises the following steps: the FPGA unit establishes a first communication connection with a baseband processing unit through a CPRI interface, transmits the RMII interface protocol data received from the first network interface unit to a CPU (central processing unit) of the baseband processing unit through the first communication connection, receives first response data of the CPU of the baseband processing unit responding to the RMII interface protocol data, and configures the digital intermediate frequency unit and/or the radio frequency unit according to the first response data.
In a third aspect, an embodiment of the present application provides a RRU and BBU networking system, including a baseband processing unit and at least one radio remote unit, where the radio remote unit is the radio remote unit in the first aspect, and the baseband processing unit establishes a first communication connection with a CPRI interface of the at least one radio remote unit through the CPRI interface; the baseband processing unit is configured to read RMII interface protocol data on an RMII interface of the at least one remote radio unit through the first communication connection, establish an ethernet connection between a second network interface unit of the baseband processing unit and a first network interface unit of the at least one remote radio unit, and/or perform IQ data and OAM signaling data transmission through the first communication connection.
In some embodiments, the baseband processing unit has a CPU unit, and the CPU unit is connected to the FPGA unit of the remote radio unit through the first communication connection, where the CPU unit is configured to at least receive RMII interface protocol data transmitted by the FPGA unit of the remote radio unit and send the first response data in response to the RMII interface protocol data.
Compared with the related art, the embodiment of the application provides a radio remote unit and a networking system of an RRU and a BBU, wherein the radio remote unit comprises an FPGA unit, a digital intermediate frequency unit, a radio frequency unit and a first network interface unit, and the FPGA unit, the digital intermediate frequency unit and the radio frequency unit are sequentially connected; the first network interface unit is connected with the FPGA unit through an RMII interface, and the FPGA unit establishes first communication connection with the baseband processing unit through a CPRI interface; the FPGA unit is used for receiving RMII interface protocol data from the first network interface unit, transmitting the RMII interface protocol data to the CPU unit of the baseband processing unit through the first communication connection, and receiving first response data of the CPU unit of the baseband processing unit responding to the RMII interface protocol data. By the remote radio unit of the embodiment, the problems of high cost and long software development period of the remote radio unit adopting a CPU and FPGA framework are solved, and the beneficial effects of reducing the cost of the remote radio unit and shortening the software development period of the remote radio unit while ensuring the performance of the remote radio unit are achieved.
The details of one or more embodiments of the application are set forth in the accompanying drawings and the description below to provide a more thorough understanding of the application.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 is a schematic diagram of a hardware structure of a conventional remote radio unit connected to a baseband processing unit;
fig. 2 is a schematic structural diagram of a connection between a remote radio unit and a baseband processing unit according to an embodiment of the present application;
fig. 3 is a schematic diagram of a hardware structure of a remote radio unit according to an embodiment of the present invention;
fig. 4 is a flowchart of a method for operating a remote radio unit according to an embodiment of the present invention;
fig. 5 is a schematic system structure diagram of a remote radio unit RRU and a baseband processing unit BBU networking according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be described and illustrated below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments provided in the present application without any inventive step are within the scope of protection of the present application.
It is obvious that the drawings in the following description are only examples or embodiments of the present application, and that it is also possible for a person skilled in the art to apply the present application to other similar contexts on the basis of these drawings without inventive effort. Moreover, it should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions must be made to achieve the developers' specific goals, such as compliance with system-related and business-related constraints, which may vary from one implementation to another.
Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the specification. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of ordinary skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments without conflict.
Unless defined otherwise, technical or scientific terms referred to herein shall have the ordinary meaning as understood by those of ordinary skill in the art to which this application belongs. Reference to "a," "an," "the," and similar words throughout this application are not to be construed as limiting in number, and may refer to the singular or the plural. The present application is directed to the use of the terms "including," "comprising," "having," and any variations thereof, which are intended to cover non-exclusive inclusions; for example, a process, method, system, article, or apparatus that comprises a list of steps or modules (elements) is not limited to the listed steps or elements, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. Reference to "connected," "coupled," and the like in this application is not intended to be limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The term "plurality" as referred to herein means two or more. "and/or" describes an association relationship of associated objects, meaning that three relationships may exist, for example, "A and/or B" may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. Reference herein to the terms "first," "second," "third," and the like, are merely to distinguish similar objects and do not denote a particular ordering for the objects.
The various techniques described herein may be used in various Wireless communication systems, such as 2G, 3G, 4G, 5G communication systems and next generation communication systems, such as Global System for Mobile communications (GSM), Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Wideband Code Division Multiple Access (OFDMA), Frequency Division Multiple Access (WCDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), FDMA-System, General Packet Radio Service (GPRS), LTE-5G (Radio System for Long Term Evolution (LTE), abbreviated NR) systems and other such communication systems.
A base station formed by a Radio Remote Unit (RRU) and a baseband processing Unit BBU described in this application may be a device in an access network that communicates with a wireless terminal through one or more sectors on an air interface. The base station may be configured to interconvert received air frames with Internet Protocol (IP) packets as a router between the wireless terminal and the rest of the access network, which may include an IP network. The base station may also coordinate management of attributes for the air interface. For example, the Base Station may be a Base Transceiver Station (BTS) in GSM or CDMA, a Base Station (Node B) in WCDMA, an evolved Node B (eNB or e-Node B) in LTE, or a generation Node B (gNB) in 5G NR, and the present application is not limited thereto.
Before describing the remote radio unit in the embodiment of the present application, the following describes the problems that the remote radio unit RRU needs to have a high cost and a long software development period, which are required to be solved by the embodiment of the present application, by using the connection and data interaction process between the existing remote radio unit RRU and the base band processing unit BBU.
Fig. 1 is a schematic diagram of a hardware structure of a conventional remote radio unit connected to a baseband processing unit. As shown in fig. 1, a main hardware architecture of an existing radio remote unit RRU is CPU unit + FPGA unit + digital intermediate frequency unit + radio frequency unit; the FPGA unit is used for processing digital signals and carrying out butt joint transmission with a digital transmission unit (CPRI interface) of the baseband processing unit through the digital transmission unit (CPRI interface); the radio frequency unit is responsible for processing and transmitting radio frequency analog signals; the CPU unit is used for downloading a program to the FPGA unit through an ssc (slave Serial configuration) mode of the FPGA unit, and configuring other hardware and requiring operation and maintenance of the radio remote unit.
The existing radio remote unit RRU and the base band processing unit BBU both include two network ports, which are Eth0 and Eth1, respectively, wherein a CPU unit of the radio remote unit RRU is connected to an FPGA unit through an RMII interface (Eth 1), and similarly, the CPU unit of the base band processing unit BBU is also connected to the FPGA unit through an RMII interface (Eth 1), and the two Eth1 ports are processed through digital transmission units (CPRI interfaces) of the FPGA units of the radio remote unit RRU and the base band processing unit BBU, so that the RMII interfaces of the radio remote unit RRU and the base band processing unit BBU are butted, and thus, Eth1 of the radio remote unit RRU is directly connected to Eth1 of the base band processing unit BBU, and ethernet communication is realized between the base band processing unit BBU and the radio remote unit RRU.
After the baseband processing unit BBU and the remote radio unit RRU establish ethernet communication, any device in a network formed by the baseband processing unit BBU and the remote radio unit RRU can be accessed from a local network port (Eth 0) of the baseband processing unit BBU and/or any remote radio unit RRU, wherein the local network ports (Eth 0) of the baseband processing unit BBU and the remote radio unit RRU are connected with respective CPU units, and a digital intermediate frequency unit and a radio unit of the remote radio unit RRU are configured by any device. In a system in which one baseband processing unit BBU and a plurality of remote radio units RRU are networked, when a local network port (Eth 0) of one remote radio unit RRU and a device connected to the local network port (Eth 0) are required to access other remote radio units RRU (where the access includes configuring a digital intermediate frequency unit and a radio frequency unit of the accessed remote radio unit RRU), the accessed data needs to be forwarded through the baseband processing unit BBU.
The above baseband processing unit BBU and the remote radio unit RRU are both configured by using a CPU unit, for example, the remote radio unit RRU is configured by using a CPU unit to configure a digital intermediate frequency unit and a radio frequency unit, and the existing remote radio unit RRU needs to be provided with a CPU unit in terms of hardware structure, so that the cost of the remote radio unit RRU is increased, and meanwhile, the remote radio unit RRU is configured by using the CPU unit in a related manner, so that the software development cycle of the remote radio unit RRU is long.
Fig. 2 is a schematic structural diagram of a connection between a remote radio unit and a baseband processing unit according to an embodiment of the present application. As shown in fig. 2, in the radio remote unit in the embodiment of the present application, a function completed by a CPU unit of an existing radio remote unit RRU is configured to be replaced by a CPU of an FPGA unit and a CPU of a baseband processing unit BBU, so that the radio remote unit RRU can ensure its performance without the CPU, and at the same time, the cost of the radio remote unit RRU is reduced and the software development cycle of the baseband processing unit BBU is shortened.
The remote radio unit 100 of the embodiment of the present application does not have a CPU unit, and includes an FPGA unit 11, a digital intermediate frequency unit 12, a radio frequency unit 13, and a first network interface unit 14, where the FPGA unit 11, the digital intermediate frequency unit 12, and the radio frequency unit 13 are connected in sequence; the first network interface unit 14 is connected with the FPGA unit 11 through the RMII interface 15, and the FPGA unit 11 establishes a first communication connection with the baseband processing unit 200 through the CPRI interface 111; the FPGA unit 11 is configured to receive RMII interface protocol data from the first network interface unit 14, transmit the RMII interface protocol data to the CPU unit 21 of the baseband processing unit 200 through the first communication connection, and receive first response data of the CPU unit 21 of the baseband processing unit 200 in response to the RMII interface protocol data.
In this embodiment, after receiving the first response data of the CPU unit 21 of the baseband processing unit 200 responding to the RMII interface protocol data, the FPGA unit 11 configures the digital intermediate frequency unit 12 and the radio frequency unit 13 according to the first response data.
In this embodiment, the digital intermediate frequency unit 12 is configured to perform digital intermediate frequency processing on the baseband signal and the uplink signal; the rf unit 13 is used for processing the transmission rf analog signal.
In this embodiment, after the remote radio unit 100 removes the CPU unit, the corresponding network interface is only the first network interface unit 14 (also a local network port, for connecting devices) connected to the FPGA unit 11, and when the remote radio unit 100 operates, the FPGA unit 11 interfaces with the CPRI interface of the FPGA module 22 of the baseband processing unit 200 through the CPRI interface 111, so as to establish an optical fiber communication connection (first communication connection), then, the FPGA unit 11 acquires RMII interface protocol data from the RMII interface 15 that connects the FPGA unit 11 with the first network interface unit 14, the RMII interface protocol data is transmitted to the FPGA module 22 of the baseband processing unit 200 through the first communication connection, and the FPGA module 22 of the baseband processing unit 200 transmits the RMII interface protocol data to the MAC controller of the CPU unit of the baseband processing unit 200 and the application program corresponding to the CPU unit 21 of the baseband processing unit 200;
after analyzing the RMII interface protocol data, the CPU unit 21 of the baseband processing unit 200 transmits back first response data responding to the RMII interface protocol data to the first network interface unit 14 of the remote radio unit 100 through the FPGA module 22 of the baseband processing unit 200, the first communication connection, the FPGA unit 11, and the RMII interface 15, so that the baseband processing unit 200 communicates with the device on the first network interface unit 14 of the remote radio unit 100; meanwhile, after the CPRI interface of the FPGA module 22 of the baseband processing unit 200 establishes the optical fiber communication connection with the CPRI interface 111 of the FPGA unit 11, the CPU unit 21 of the baseband processing unit 200 correspondingly obtains the control authority of the remote radio unit 100, and after the CPU unit 21 of the baseband processing unit 200 obtains the control authority of the remote radio unit 100, the CPU unit 21 of the baseband processing unit 200 can configure and read the relevant parameters of the remote radio unit 100, furthermore, the first network interface unit 14 of the remote rf unit 100 is equivalent to the second network interface unit 26 (Eth 0) of the CPU unit 21 interfacing with the baseband processing unit 200, that is, the second network interface unit 26 is equivalent to the CPU unit 21 interfacing with the baseband processing unit 200, thereby realizing ethernet connection and data transmission between the second network interface unit 26 (Eth 0) of the baseband processing unit 200 and the CPU unit 21 and the first network interface unit 14 of the remote radio unit 100.
It should be noted that, in this embodiment, the first network interface unit 14 is a local network port through which the remote radio unit 100 is connected to an external device, the second network interface unit 26 is a network port through which the CPU unit 21 of the baseband processing unit 200 is connected to the FPGA module 22, the second network interface unit 26 is a network interface built in the baseband processing unit 200, in a protocol layer, the second network interface unit 26 is an RMII interface protocol, and in a physical layer, the second network interface unit 26 is correspondingly composed of a MAC controller of the CPU unit 21 of the baseband processing unit 200 and a corresponding protocol chip. It should be further noted that, in this embodiment, the CPU unit 21 of the baseband processing unit 200 is further provided with another network port, the another network port may be connected to a local network port (Eth 1, not shown in the drawings) of the baseband processing unit 200 through a PHY, and the local network port (Eth 1) is used for the baseband processing unit 200 to connect external devices and data backhaul, so as to implement ethernet communication between the external devices and the baseband processing unit 200.
Fig. 3 is a schematic diagram of a hardware structure of a remote radio unit according to an embodiment of the present invention, as shown in fig. 3, the FPGA unit 11 includes a control unit 112 and a digital processing unit 113, the control unit 112 is connected to the first network interface unit 14 through an RMII interface 15, the control unit 112 is connected to the digital processing unit 113, the control unit 112 is further connected to the digital intermediate frequency unit 12 and the radio frequency unit 13 through serial communication, and the digital processing unit 113 is further connected to the CPRI interface 111 and the digital intermediate frequency unit 12 respectively; wherein, the digital processing unit 113 is at least used for performing digital signal processing on the RMII interface protocol data and the first response data; the control unit 112 is at least used for receiving RMII interface protocol data from the first network interface unit 14, controlling the CPRI interface 111 to interface with a CPRI interface (not numbered in the drawing) of the baseband processing unit 200 for transmission, controlling the digital processing unit 113 to perform digital signal processing, and receiving the first response data subjected to the digital signal processing.
It should be noted that, in this embodiment, the digital processing unit 113 is further configured to process IQ signaling data interacting with the digital intermediate frequency unit 12.
In this embodiment, the FPGA unit 11 is used for digital signal processing and data transmission, wherein the data transmission is interfaced with the CPRI interface of the baseband processing unit 200 through the CPRI interface 111 of the FPGA unit 11.
In this embodiment, the serial communication includes one of the following: SPI communication, I communication cancel C communication.
In some embodiments, the remote radio unit 100 further includes a storage unit 16, and the storage unit 16 is connected to the FPGA unit 11 through serial communication (SPI communication), where the storage unit 16 is configured to store a preset configuration program, and the FPGA unit 11 is further configured to read the preset configuration program from the storage unit 16 through a preset configuration mode.
In this embodiment, the preset configuration mode includes an active serial configuration mode; in this embodiment, the hardware configuration interface timing (SPI, I2C) of the remote radio unit 100 may be generated by the FPGA unit 11, and the hardware modules corresponding to the digital intermediate frequency unit 12 and the radio frequency unit 13 may be read through the hardware configuration interface timing; the FPGA unit 11 may automatically read a file from the storage unit 16 (SPI FLASH) in an msc (master Serial configuration) mode, and automatically load a preset configuration program (FPGA program), and the function of the radio remote unit 100 to store and/or read data on the storage unit 16 is completed by the FPGA unit 11.
In some embodiments, the remote radio unit 100 further includes a power supply unit 17, and the power supply unit 17 is electrically connected to the FPGA unit 11, the digital intermediate frequency unit 12, and the radio unit 13; the power supply unit 17 is at least used for supplying power to the FPGA unit 11, the digital intermediate frequency unit 12 and the radio frequency unit 13.
The remote radio unit 100 of the embodiment of the present application replaces part of the work of the CPU unit of the remote radio unit having the CPU unit with the FPGA unit 11, transmits another function to the baseband processing unit 200 through the CPRI interface 111 of the FPGA unit 11, and completes a corresponding function by the CPU unit 21 of the baseband processing unit 200, so that the cost for developing the remote radio unit 100 is saved, and the software development cycle of the remote radio unit 100 is shortened.
Fig. 4 is a flowchart of a method for operating a remote radio unit according to an embodiment of the present invention. As shown in fig. 4, the method includes the steps of:
step S401, the FPGA unit pulls a preset configuration program stored in the remote radio unit.
In this embodiment, the configuration program is pulled to configure and operate the corresponding function of the FPGA unit.
Step S402, the FPGA unit executes a first function according to a preset configuration program, wherein the first function at least comprises: the FPGA unit establishes a first communication connection with the baseband processing unit through the CPRI interface, transmits RMII interface protocol data received from the first network interface unit to the CPU unit of the baseband processing unit through the first communication connection, receives first response data of the CPU unit of the baseband processing unit responding to the RMII interface protocol data, and configures the digital intermediate frequency unit and/or the radio frequency unit according to the first response data.
Fig. 5 is a schematic system structure diagram of a remote radio unit RRU and a baseband processing unit BBU networking according to an embodiment of the present invention. As shown in fig. 5, an RRU and BBU networking system provided in the embodiment of the present application includes a baseband processing unit 200 and at least one remote radio unit 100, where the remote radio unit 100 is the remote radio unit 100, and the baseband processing unit 200 establishes a first communication connection with a CPRI interface 111 of the at least one remote radio unit 100 through the CPRI interface; the baseband processing unit 200 is configured to read RMII interface protocol data on the RMII interface 15 of the at least one remote radio unit 100 through the first communication connection, and establish an ethernet connection between the second network interface unit of the baseband processing unit 200 and the first network interface unit 14 of the at least one remote radio unit 100, and/or perform IQ data and OAM signaling data transmission through the first communication connection.
It should be noted that, when multiple radio remote units 100 and the baseband processing unit 200 are networked through the first communication connection, the FPGA module 22 of the baseband processing unit 200 establishes multiple first communication connections according to the CPRI interface position identifier (optical port position identifier) of the network where the radio remote unit 100 is located, and correspondingly distributes corresponding data through the CPRI interface position identifier (optical port position identifier).
In some embodiments, the baseband processing unit 200 has a CPU unit 21, and the CPU unit 21 is connected to the FPGA unit 11 of the remote radio unit 100 through a first communication connection, where the CPU unit 21 is configured to at least receive RMII interface protocol data transmitted by the FPGA unit 11 of the remote radio unit 100 and send first response data in response to the RMII interface protocol data.
In some embodiments, the baseband processing unit 200 further includes an FPGA module 22, a baseband unit 23, and a storage module 24, the CPU unit 21 is connected to the second network interface unit (Eth 1) and the FPGA module 22 of the baseband processing unit 200 through an RMII interface, the CPU unit 21 is further connected to the baseband unit 23 and the storage module 24 through serial communication, and the FPGA module 22 is connected to the CPRI interface of the baseband processing unit 200, where the CPU unit 21 is at least configured to control the CPRI interface of the baseband processing unit 200 to establish a first communication connection with the CPRI interface 111 of the radio remote unit 100, read RMII interface protocol data on the RMII interface of the radio remote unit 100, pull a second preset configuration program from the storage module 24, control the baseband unit 23 to generate a baseband signal, and control the FPGA module 22 to perform digital signal processing.
In this embodiment, the baseband processing unit 200 further includes a power module 25, and the power module 25 is connected to and supplies power to the CPU unit 21, the FPGA module 22, the baseband unit 23, and the storage module 24, respectively.
In this embodiment, the storage module 24 of the baseband processing unit 200 includes a FLASH chip, and/or the FPGA module 22 includes an FPGA chip.
It should be understood by those skilled in the art that various features of the above-described embodiments can be combined in any combination, and for the sake of brevity, all possible combinations of features in the above-described embodiments are not described in detail, but rather, all combinations of features which are not inconsistent with each other should be construed as being within the scope of the present disclosure.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (9)
1. A remote radio unit having no CPU, the remote radio unit comprising: the system comprises an FPGA unit, a digital intermediate frequency unit, a radio frequency unit and a first network interface unit, wherein the FPGA unit, the digital intermediate frequency unit and the radio frequency unit are sequentially connected; the first network interface unit is connected with the FPGA unit through an RMII interface, and the FPGA unit is connected with the baseband processing unit through a CPRI interface in a first communication way; the FPGA unit is configured to receive RMII interface protocol data from the first network interface unit, transmit the RMII interface protocol data to the CPU of the baseband processing unit through the first communication connection, and receive first response data of the CPU of the baseband processing unit in response to the RMII interface protocol data.
2. The remote radio unit according to claim 1, wherein the FPGA unit comprises a control unit and a digital processing unit, the control unit is connected to the first network interface unit through the RMII interface, the control unit is connected to the digital processing unit, the control unit is further connected to the digital intermediate frequency unit and the radio frequency unit through serial communication, and the digital processing unit is further connected to the CPRI interface and the digital intermediate frequency unit; wherein the content of the first and second substances,
the digital processing unit is at least used for carrying out digital signal processing on the RMII protocol data and the first response data;
the control unit is at least used for receiving the RMII protocol data from the first network interface unit, controlling the CPRI interface to be in butt joint transmission with the CPRI interface of the baseband processing unit, controlling the digital processing unit to perform digital signal processing and receiving the first response data subjected to digital signal processing.
3. The remote radio unit according to claim 2, wherein the serial communication comprises one of: SPI communication, I communication cancel C communication.
4. The remote radio unit according to any of claims 1 to 3, further comprising a storage unit, wherein the storage unit is connected to the FPGA unit through serial communication, wherein the storage unit is configured to store a preset configuration program, and the FPGA unit is further configured to read the preset configuration program from the storage unit through a preset configuration mode.
5. The remote radio unit of claim 4, wherein the preset configuration mode comprises an active serial configuration mode.
6. The remote radio unit according to claim 4, further comprising a power supply unit electrically connected to the FPGA unit, the digital intermediate frequency unit and the radio unit; the power supply unit is at least used for supplying power to the FPGA unit, the digital intermediate frequency unit and the radio frequency unit.
7. A method of operating a remote radio unit according to any of claims 1 to 6, comprising the steps of:
the FPGA unit pulls a preset configuration program stored in the radio remote unit;
the FPGA unit executes a first function according to the preset configuration program, wherein the first function at least comprises the following steps: the FPGA unit establishes a first communication connection with a baseband processing unit through a CPRI interface, transmits the RMII interface protocol data received from the first network interface unit to a CPU (central processing unit) of the baseband processing unit through the first communication connection, receives first response data of the CPU of the baseband processing unit responding to the RMII interface protocol data, and configures the digital intermediate frequency unit and/or the radio frequency unit according to the first response data.
8. An RRU and BBU networking system, comprising a baseband processing unit and at least one remote radio unit, wherein the remote radio unit is the remote radio unit of any one of claims 1 to 6, and the baseband processing unit establishes a first communication connection with a CPRI interface of the at least one remote radio unit through the CPRI interface; the baseband processing unit is configured to read RMII interface protocol data on an RMII interface of the at least one remote radio unit through the first communication connection, establish an ethernet connection between a second network interface unit of the baseband processing unit and a first network interface unit of the at least one remote radio unit, and/or perform IQ data and OAM signaling data transmission through the first communication connection.
9. The RRU and BBU networking system of claim 8, wherein the baseband processing unit has a CPU unit, and the CPU unit is connected to the FPGA unit of the remote radio unit through the first communication connection, wherein the CPU unit is at least configured to receive RMII interface protocol data transmitted by the FPGA unit of the remote radio unit, and send the first response data in response to the RMII interface protocol data.
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| CN202011043050.XA CN111885617B (en) | 2020-09-28 | 2020-09-28 | Radio remote unit and RRU and BBU networking system |
| PCT/CN2021/079186 WO2022062323A1 (en) | 2020-09-28 | 2021-03-05 | Radio remote unit, and rru and bbu networking system |
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| CN111885617B (en) * | 2020-09-28 | 2020-12-15 | 三维通信股份有限公司 | Radio remote unit and RRU and BBU networking system |
| CN112653638B (en) * | 2020-12-14 | 2023-03-24 | 中科南京移动通信与计算创新研究院 | Device for switching routes of multiple paths of intermediate frequencies and baseband at high speed and communication method thereof |
| CN112636807B (en) * | 2020-12-29 | 2023-02-28 | 京信网络系统股份有限公司 | Baseband remote transmission device, base station, remote coverage unit and wireless coverage system |
| CN113473648A (en) * | 2021-06-29 | 2021-10-01 | 南京濠暻通讯科技有限公司 | Data transmission method between RMII and 10G interfaces in 5G base station RU |
| CN115021818A (en) * | 2022-04-22 | 2022-09-06 | 三维通信股份有限公司 | Ethernet networking system and networking method based on distributed base station |
| CN116133029A (en) * | 2022-12-14 | 2023-05-16 | 三维通信股份有限公司 | Fault processing system, method, communication device, and computer storage medium |
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| CN201467461U (en) * | 2009-07-03 | 2010-05-12 | 大唐移动通信设备有限公司 | Base station equipment and base station maintenance system |
| EP2517375B1 (en) * | 2009-12-25 | 2018-08-08 | Orange | Telecommunication transmission method and system |
| CN103180844B (en) * | 2010-08-17 | 2017-10-03 | 大力系统有限公司 | Neutral host architecture for distributing antenna system |
| CN102347779A (en) * | 2011-07-22 | 2012-02-08 | 新邮通信设备有限公司 | Time division duplexing radio remote unit equipment and multichannel receive link multiplexing method |
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| CN107294627B (en) * | 2017-06-23 | 2020-10-30 | 武汉虹信通信技术有限责任公司 | Whole machine testing and aging method and system for RRU |
| CN110278011B (en) * | 2019-06-12 | 2021-04-27 | 京信通信系统（中国）有限公司 | Distributed antenna system, method and apparatus |
| CN111885617B (en) * | 2020-09-28 | 2020-12-15 | 三维通信股份有限公司 | Radio remote unit and RRU and BBU networking system |
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Application publication date: 20201103 Assignee: ZHEJIANG SANWEI WIRELESS TECHNOLOGY Co.,Ltd. Assignor: SUNWAVE COMMUNICATIONS Co.,Ltd. Contract record no.: X2021330000205 Denomination of invention: RF remote unit and RRU and BBU networking system Granted publication date: 20201215 License type: Common License Record date: 20210831 |