Remote radio device of multi-channel mobile communication base station

Abstract

The utility model discloses a multi-channel mobile communication base station radio frequency remote device, which comprises a main digital radio frequency processing unit and a backup digital radio frequency processing unit which are independently arranged and have the same structure, are connected through a high-speed digital interface, and both comprise a plurality of digital radio frequency processing channels, converting the multiple paths of transmitting baseband signals into transmitting radio-frequency signals, and converting the multiple paths of receiving radio-frequency signals into multiple paths of receiving baseband signals; when the main digital radio frequency processing unit works, the backup digital radio frequency processing unit is in a hot backup state, and when it is detected that any digital radio frequency processing channel in the main digital radio frequency processing unit is abnormal, the backup digital radio frequency processing unit is started in time, and rapid switching is completed.

Description

Technical Field

[0001] This utility model relates to the field of mobile communication base station system technology, and in particular to a multi-channel mobile communication base station radio frequency remote extension device. Background Technology

[0002] Distributed base stations have become the mainstream architecture for mobile communication base stations, widely used in both conventional public communication networks and industry-specific communication networks. As a crucial component of distributed base stations, the radio frequency (RF) unit of a mobile communication base station performs the important functions of converting transmitted baseband signals to RF signals and receiving RF signals back to baseband signals. In industry applications, particularly those with high reliability requirements, such as railway 5G-R applications, the downtime for base station services must be less than 3 seconds. Conventional hot or cold backups between two independent base stations cannot meet this requirement in terms of handover time. Utility Model Content

[0003] The main purpose of this invention is to provide a multi-channel mobile communication base station radio frequency remote extension device, which can reduce base station service interruption time through rapid backup and switching.

[0004] The technical solution adopted in this utility model is:

[0005] A multi-channel mobile communication base station radio frequency remote extension device is provided, including two independently configured and structurally identical main digital radio frequency processing units and backup digital radio frequency processing units. The two are connected through a high-speed digital interface, and both include multiple digital radio frequency processing channels to convert multiple transmit baseband signals into transmit radio frequency signals and convert multiple receive radio frequency signals into multiple receive baseband signals.

[0006] When the main digital radio frequency processing unit is working, the backup digital radio frequency processing unit is in hot backup mode. When any digital radio frequency processing channel in the main digital radio frequency processing unit is detected to be abnormal, the backup digital radio frequency processing unit is started in time to complete the switch.

[0007] According to the above technical solution, the remote extension device also includes a first multiplexer unit and a second multiplexer unit. The first multiplexer unit is connected to multiple digital radio frequency processing channels of the main digital radio frequency processing unit, and the second multiplexer unit is connected to multiple digital radio frequency processing channels of the backup digital radio frequency processing unit.

[0008] Following the above technical solution, the remote extension device also includes a power supply and lightning protection unit, which are connected to both the main digital radio frequency processing unit and the backup digital radio frequency processing unit.

[0009] According to the above technical solution, the remote device includes two half-shells, with the main digital radio frequency processing unit installed in one half-shell and the backup digital radio frequency processing unit installed in the other half-shell, forming physical isolation.

[0010] According to the above technical solution, the main digital radio frequency processing unit includes at least one programmable logic controller, which performs digital up-conversion processing on the transmit channel and digital down-conversion processing on the receive channel among the multiple digital radio frequency processing channels.

[0011] According to the above technical solution, the main digital radio frequency processing unit includes an integrated radio frequency transceiver chip, which is connected to the programmable logic processor through a high-speed data interface. The integrated radio frequency transceiver chip converts multiple transmit digital signals into multiple transmit radio frequency signals and converts multiple receive radio frequency signals into multiple receive digital signals.

[0012] Following the above technical solution, the remote extension device also includes another integrated transceiver chip, which converts one transmitting antenna calibration digital signal into a radio frequency signal and converts one receiving antenna calibration radio frequency signal into a digital signal.

[0013] According to the above technical solution, the main digital radio frequency processing unit includes a multi-channel power amplifier / low-noise amplifier unit, which amplifies multiple transmitted radio frequency signals to the desired power value, and at the same time amplifies multiple received radio frequency signals with low noise.

[0014] According to the above technical solution, the main digital radio frequency processing unit includes at least one SOC chip that integrates a CPU and an FPGA, wherein the CPU runs the whole machine control software and the FPGA processes the whole machine eCPRI interface protocol.

[0015] According to the above technical solution, both the main digital radio frequency processing unit and the backup digital radio frequency processing unit include eight digital radio frequency processing channels, of which four channels process the transmitted baseband signal and the other four channels process the received radio frequency signal.

[0016] The beneficial effects of this utility model are as follows: The multi-channel mobile communication base station radio frequency remote extension device of this utility model is provided with multiple main transmission and reception channels and multiple backup transmission and reception channels, which are processed by different digital radio frequency processing units. When the main digital radio frequency processing unit is working, the backup digital radio frequency processing unit is in hot backup state. When any digital radio frequency processing channel in the main digital radio frequency processing unit is detected to be abnormal, the backup digital radio frequency processing unit is started in time to complete the rapid switching, thereby meeting the time requirements for base station service interruption.

[0017] Furthermore, the main digital radio frequency processing unit and the backup digital radio frequency processing unit are arranged on two halves of the same radio frequency remote unit, which physically isolates them, thus ensuring that if one half is damaged, the other half can continue to work.

[0018] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic block diagram of a multi-channel mobile communication base station radio frequency remote extension device according to an embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the structure of a multi-channel mobile communication base station radio frequency remote extension device according to another embodiment of the present invention. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0023] It should be noted that the illustrations provided in the embodiments of this utility model are only schematic representations of the basic concept of this utility model. Therefore, the drawings only show the components related to this utility model and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0024] Furthermore, it should be noted that the features of the various embodiments of this utility model can be combined or integrated in part or in whole, and as those skilled in the art will understand, they can interact and operate in different ways. Each embodiment can be implemented independently of each other, or implemented in an associated relationship.

[0025] like Figure 1As shown, the multi-channel mobile communication base station radio frequency remote device of this utility model includes two independently configured and structurally identical main digital radio frequency processing unit 100 and backup digital radio frequency processing unit 200. The two are connected through a high-speed digital interface, and both include multiple digital radio frequency processing channels to convert multiple transmit baseband signals into transmit radio frequency signals and convert multiple receive radio frequency signals into multiple receive baseband signals.

[0026] When the main digital radio frequency processing unit 100 is working, the backup digital radio frequency processing unit 200 is in hot backup state. When any digital radio frequency processing channel in the main digital radio frequency processing unit 100 is detected to be abnormal, the backup digital radio frequency processing unit 200 is started in time to complete the switch.

[0027] As can be seen, this embodiment sets up multiple main transmission and reception paths and multiple backup transmission and reception paths, which are independently processed by different digital radio frequency processing units. When one digital radio frequency processing unit fails, the other digital radio frequency processing unit can continue to work, and a fast switching can be achieved to meet the fast switching requirements in communication services.

[0028] Furthermore, the remote extension device also includes a first multiplexer unit 400 and a second multiplexer unit 500. The first multiplexer unit 400 is connected to multiple digital radio frequency processing channels of the main digital radio frequency processing unit 100, and the second multiplexer unit 500 is connected to multiple digital radio frequency processing channels of the backup digital radio frequency processing unit 200.

[0029] The remote extension device also includes a power supply and lightning protection unit 300, which is connected to both the main digital radio frequency processing unit 100 and the backup digital radio frequency processing unit 200.

[0030] In a preferred embodiment of this invention, the remote extension device includes two half-shells. The main digital radio frequency processing unit 100 is installed in one half-shell, and the backup digital radio frequency processing unit 200 is installed in the other half-shell, forming physical isolation. This further ensures that if one half is damaged, the other half can continue to operate.

[0031] Specifically, such as Figure 2As shown, the main digital radio frequency processing unit 100 includes a CPU+FPGA logic SOC chip 101, a first programmable logic controller 102, a first integrated transceiver unit 103, a third integrated transceiver unit 104, a first high-speed digital interface 105, and a first multi-channel power amplifier / low-noise amplifier unit 106. The CPU+FPGA logic SOC chip 101 can be a second-generation SOC from XINLINX, integrating four ARM cores and an FPGA programmable logic processor. The logic SOC chip 101 is connected to the first programmable logic controller 102, the second programmable logic controller 101, and the third integrated transceiver unit 104 via a JESD204 high-speed digital interface. The first programmable logic controller 102 and the first integrated transceiver unit 103 are connected via a JESD204 high-speed digital interface. The first integrated transceiver unit 103 and the first multi-channel power amplifier / low-noise amplifier unit 106 are connected via an RF interface, including the connection of four transmit links (TX1 to TX4), four receive links (RX1 to RX4), and two DPD feedback sampling RF links (FB1 and FB2). The first integrated transceiver unit 103 can use the ADRV9025 chip from Analog Devices. The RF and antenna calibration paths of the third integrated transceiver unit 104 are connected to an external interface via RF cables. The first programmable logic controller 102 implements digital up-conversion processing for the four transmit channels and digital down-conversion processing for the four receive channels. The first integrated transceiver unit 103 is mainly used to convert four transmit digital signals to four transmit RF signals, and four receive RF signals to four receive digital signals. The first multi-channel power amplifier / low-noise amplifier unit 106 is mainly used to amplify four transmitted RF signals to the desired power value, and also includes four low-noise amplifier circuits to achieve low-noise amplification of four received RF signals. The third integrated transceiver unit 104 performs the conversion processing of one transmitted antenna calibration digital signal to RF signal and one received antenna calibration RF signal to digital signal.

[0032] In this embodiment, the CPU in the logic SOC chip 101 runs the overall system control software, and the FPGA processes the overall system eCPRI interface protocol. Specifically, the main functions implemented by the FPGA include: processing the eCPRI 7.2 interface protocol for interface interaction with the BBU for transmitting and receiving signals, as well as the interaction of management and control commands; and controlling whether to switch to the backup digital radio frequency processing unit based on the status of the digital intermediate frequency and radio frequency paths in the main digital radio frequency processing unit 100.

[0033] In this embodiment, the backup digital radio frequency processing unit 200 includes a second programmable logic controller 201, a second integrated transceiver unit 202, a second high-speed digital interface 203, and a second multi-channel power amplifier / low-noise amplifier unit 204. The second programmable logic controller 201 is connected to the logic SOC chip 101 via the second high-speed digital interface 203, specifically via the JESD204 high-speed interface protocol. The second programmable logic controller 201 and the second integrated transceiver unit 202 are connected via the JESD204 high-speed digital interface. The second integrated transceiver unit 202 and the second multi-channel power amplifier / low-noise amplifier unit 204 are connected via a radio frequency interface, including the connection of four transmit links (TX1 to TX4), four receive links (RX1 to RX4), and two DPD feedback sampling radio frequency links (FB1 and FB2). The second integrated transceiver unit 202 uses an ADRV9025 chip from Analog Devices, and is connected to the logic SOC chip 101 in the main digital radio frequency processing unit 100 via the JESD204C protocol. The second programmable logic controller 201 implements digital up-conversion processing for the four transmit channels and digital down-conversion processing for the four receive channels. The second integrated transceiver unit 202 implements the conversion of the four transmit digital signals to four transmit RF signals, and the conversion of the four receive RF signals to four receive digital signals. The second multi-channel power amplifier / low-noise amplifier unit 204 amplifies the four transmit RF signals to the desired power value, and also includes four low-noise amplifier circuits to achieve low-noise amplification of the four receive RF signals.

[0034] Furthermore, in this embodiment, the first multiplexer unit 400 is a 4-channel duplexer, equipped with 4 transmit filters and 4 receive filters, which respectively implement radio frequency filtering for the four main transmit signals and four main receive signals. The second multiplexer unit 500 is a 4-channel duplexer, equipped with 4 transmit filters and 4 receive filters, which respectively implement radio frequency filtering for the four backup transmit signals and four backup receive signals.

[0035] In this embodiment, the power supply and lightning protection unit 300 mainly realizes the power supply and lightning protection of the equipment, and converts the input power supply voltage into corresponding 48V and 12V voltages to supply power to the main digital radio frequency processing unit 100 and the backup digital radio frequency processing unit 200 respectively.

[0036] During operation, channel 4 of the main digital radio frequency processing unit 100 is in normal working condition, while the backup digital radio frequency processing unit 200 is in hot backup state. When the logic SOC chip 101 detects that a channel in the main digital radio frequency processing unit 100 has failed or is abnormal, the logic SOC chip 101 switches the working channel to the backup digital radio frequency processing unit 200.

[0037] As can be seen, this embodiment divides the digital intermediate frequency processing channel and the radio frequency physical processing channel in the radio frequency remote device of the same eight-channel mobile communication base station into two parts, namely the main digital radio frequency processing unit 100 and the backup digital radio frequency processing unit 200. During normal operation, four channels in the main digital radio frequency processing unit 100 are in working state, and four channels in the backup digital radio frequency processing unit 200 are in hot backup state. When an abnormality is detected in the intermediate frequency or radio frequency processing channel of the main digital radio frequency processing unit 100, the backup digital radio frequency processing unit 200 is started in time, and the switching can be completed within 3 seconds, which has the characteristics of fast and seamless switching. At the same time, physically, the main digital radio frequency processing unit 100 and the backup digital radio frequency processing unit 200 are different hardware and are installed on two different chassis (or shells), which effectively ensures that the damage of one part will not affect the other part, especially in scenarios where the requirements for communication intermediate frequency time are strict and master and slave backup are required.

[0038] It should be noted that, depending on the implementation needs, the various steps / components described in this application can be broken down into more steps / components, or two or more steps / components or parts of the operation of steps / components can be combined into new steps / components to achieve the purpose of this utility model.

[0039] The order of the steps in the above embodiments does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0040] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A multi-channel mobile communication base station radio frequency remote extension device, characterized in that, It includes two independently configured and structurally identical main digital radio frequency processing units and a backup digital radio frequency processing unit, which are connected through a high-speed digital interface. Both units include multiple digital radio frequency processing channels to convert multiple transmit baseband signals into transmit radio frequency signals and multiple receive radio frequency signals into multiple receive baseband signals. When the main digital radio frequency processing unit is working, the backup digital radio frequency processing unit is in hot backup mode. When any digital radio frequency processing channel in the main digital radio frequency processing unit is detected to be abnormal, the backup digital radio frequency processing unit is started in time to complete the switch.

2. The multi-channel mobile communication base station radio frequency remote extension device according to claim 1, characterized in that, The remote extension device also includes a first multiplexer unit and a second multiplexer unit. The first multiplexer unit is connected to multiple digital radio frequency processing channels of the main digital radio frequency processing unit, and the second multiplexer unit is connected to multiple digital radio frequency processing channels of the backup digital radio frequency processing unit.

3. The multi-channel mobile communication base station radio frequency remote extension device according to claim 1, characterized in that, The remote unit also includes a power supply and lightning protection unit, which is connected to both the main digital radio frequency processing unit and the backup digital radio frequency processing unit.

4. The multi-channel mobile communication base station radio frequency remote extension device according to claim 1, characterized in that, The remote unit comprises two half-shells, with the main digital radio frequency processing unit installed in one half-shell and the backup digital radio frequency processing unit installed in the other half-shell, forming physical isolation.

5. The multi-channel mobile communication base station radio frequency remote extension device according to claim 1, characterized in that, The main digital radio frequency processing unit includes at least one programmable logic controller, which performs digital up-conversion processing on the transmit channel and digital down-conversion processing on the receive channel among multiple digital radio frequency processing channels.

6. The multi-channel mobile communication base station radio frequency remote extension device according to claim 5, characterized in that, The main digital radio frequency processing unit includes an integrated radio frequency transceiver chip, which is connected to the programmable logic processor through a high-speed data interface. The integrated radio frequency transceiver chip converts multiple transmit digital signals into multiple transmit radio frequency signals and converts multiple receive radio frequency signals into multiple receive digital signals.

7. The multi-channel mobile communication base station radio frequency remote extension device according to claim 6, characterized in that, The remote extension device also includes another integrated transceiver chip that converts one transmit antenna calibration digital signal into a radio frequency signal and one receive antenna calibration radio frequency signal into a digital signal.

8. The multi-channel mobile communication base station radio frequency remote extension device according to claim 1, characterized in that, The main digital radio frequency processing unit includes a multi-channel power amplifier / low-noise amplifier unit, which amplifies multiple transmitted radio frequency signals to the desired power value, and simultaneously amplifies multiple received radio frequency signals with low noise.

9. The multi-channel mobile communication base station radio frequency remote extension device according to any one of claims 1-8, characterized in that, The main digital radio frequency processing unit includes at least one SOC chip that integrates a CPU and an FPGA, wherein the CPU runs the overall control software and the FPGA processes the overall eCPRI interface protocol.

10. The multi-channel mobile communication base station radio frequency remote extension device according to any one of claims 1-8, characterized in that, Both the main digital radio frequency processing unit and the backup digital radio frequency processing unit include eight digital radio frequency processing channels, four of which process the transmitted baseband signal and the other four process the received radio frequency signal.

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