Multi-carrier base station and synchronization method thereof, electronic equipment and storage medium

Abstract

The invention relates to a multi-carrier base station and a synchronization method thereof, electronic equipment and a storage medium, which are applied to the technical field of communication, and the multi-carrier base station comprises a baseband control unit, a baseband modulation and demodulation digital channel and a radio frequency front end, the baseband modulation-demodulation digital channel comprises a plurality of modulation-demodulation links and a clock control unit; two ends of each modulation-demodulation link are respectively connected with the baseband control unit and the radio frequency front end; the baseband control unit is used for sending reference time information to the clock control unit; the reference time information comprises pulse per second and a standard clock; the clock control unit is used for acquiring the reference time information sent by the baseband control unit, performing clock training on the reference time information to obtain an equipment clock, and synchronizing the equipment clock to each modulation-demodulation link; and generating a time slot signal based on the reference time information; and the clock control unit synchronizes the time slot signals to the baseband control unit and the radio frequency front end respectively.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a multi-carrier base station and a synchronization method thereof, an electronic device and a storage medium. Background Art

[0002] In narrowband digital communication systems, multi-carrier base stations mostly adopt the traditional solution, that is, the channel machine stacking method is used for design. Each channel machine is combined into one channel through a combiner, and then the carrier frequency needs to be calculated in the entire frequency band, which makes the algorithm difficult and the workload large. If a multi-carrier base station with multiple channels separated is used, how to synchronize each channel in real time is the main difficulty in the design. Summary of the invention

[0003] The present application provides a multi-carrier base station and a synchronization method thereof, an electronic device and a storage medium, so as to solve the problem of how to synchronize a multi-carrier base station with multi-channel separation in the prior art.

[0004] In a first aspect, an embodiment of the present application provides a multi-carrier base station, including a baseband control unit, a baseband modem digital path and a radio frequency front end; the baseband modem digital path includes a plurality of modem links and a clock control unit; two ends of each of the modem links are respectively connected to the baseband control unit and the radio frequency front end; A baseband control unit, configured to send reference time information to the clock control unit; the reference time information includes second pulses and a standard clock; A clock control unit is used to obtain the reference time information sent by the baseband control unit, train the reference time information to obtain the device clock, synchronize the device clock to each of the modulation and demodulation links; and generate a time slot signal based on the reference time information; the clock control unit synchronizes the time slot signal to the baseband control unit and the RF front end respectively.

[0005] Optionally, the baseband control unit is used to generate second time slot information based on the reference time information, and compare the first time slot information with its own second time slot information. If the two are consistent, the data corresponding to the next time slot of the second time slot information is sent to the baseband modulation and demodulation digital channel.

[0006] Optionally, the clock control unit is also used to obtain the air interface advance; and after obtaining the air interface advance of the reference time information, send the first time slot signal to the baseband control unit and the RF front end respectively, and send a time slot signal to the baseband control unit and the RF front end every first preset time interval.

[0007] Optionally, the baseband control unit is further configured to resend the reference time information to the clock control unit at intervals of a second preset time length to perform time slot calibration.

[0008] Optionally, the clock control unit includes a clock training module and a control module; The clock training module is used to calibrate the reference time information to obtain a device clock, and synchronize the device clock to each of the modulation and demodulation links; The control module is used to generate a time slot signal based on the reference time information.

[0009] Optionally, the baseband control unit includes a constant temperature crystal oscillator and a Beidou timing module to generate the second pulse and standard clock.

[0010] In a second aspect, an embodiment of the present application provides a synchronization method of a multi-carrier base station, which is applied to the multi-carrier base station described in the first aspect, and the method includes: The reference time information sent by the baseband control unit is obtained by the clock control unit in the multi-carrier base station, the reference time information is locked, followed, and calibrated to obtain the device clock, and the device clock is synchronized to each of the modulation and demodulation links; and a time slot signal is generated based on the reference time information; the reference time information includes a second pulse and a standard clock; The time slot signal is synchronized to the baseband control unit and the radio frequency front end respectively through the clock control unit.

[0011] Optionally, synchronizing the time slot signal to the baseband control unit and the radio frequency front end respectively includes: Get the air interface advance; After acquiring the air interface advance of the reference time information, a first time slot signal is sent to the baseband control unit and the radio frequency front end respectively, and a time slot signal is sent to the baseband control unit and the radio frequency front end every first preset time length.

[0012] In a third aspect, an embodiment of the present application provides an electronic device, comprising: a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other via the communication bus; The memory is used to store computer programs; The processor is used to execute the program stored in the memory to implement the synchronization method of the multi-carrier base station described in the first aspect.

[0013] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium storing a computer program, wherein the computer program, when executed by a processor, implements the multi-carrier base station synchronization method described in the first aspect.

[0014] The above technical solution provided by the embodiment of the present application has the following advantages compared with the prior art: the multi-carrier base station provided by the embodiment of the present application includes a baseband control unit, a baseband modulation and demodulation digital path and a radio frequency front end; the baseband modulation and demodulation digital path includes multiple modulation and demodulation links and a clock control unit; the two ends of each modulation and demodulation link are respectively connected to the baseband control unit and the radio frequency front end; the baseband control unit is used to send reference time information to the clock control unit; the reference time information includes a second pulse and a standard clock; the clock control unit is used to obtain the reference time information sent by the baseband control unit, train the reference time information to obtain the device clock, and synchronize the device clock to each of the modulation and demodulation links; and generate a time slot signal based on the reference time information; the clock control unit synchronizes the time slot signal to the baseband control unit and the radio frequency front end respectively. In this way, the clock control unit generates a time slot signal based on the reference time information and synchronizes it to the radio frequency front end, so that the radio frequency front end can use the time slot signal as a trigger signal to synchronize the transmission of multiple channels and align the time slots, and the time slot signal is synchronized to the baseband control unit, so that the baseband control unit, the baseband modulation and demodulation digital path and the radio frequency front end are all synchronized. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0017] Figure 1 A schematic diagram of the structure of a multi-carrier base station provided in one embodiment of the present application; Figure 2 A flowchart of a synchronization method for a multi-carrier base station provided in an embodiment of the present application; Figure 3 A time slot diagram of a synchronization method for a multi-carrier base station provided in an embodiment of the present application; Figure 4 A structural diagram of an electronic device provided in one embodiment of the present application. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0019] According to an embodiment of the present application, a multi-carrier base station is provided. Figure 1 The multi-carrier base station includes a baseband control unit, a baseband modem digital path and a radio frequency front end; the baseband modem digital path includes a plurality of modem links and a clock control unit; the two ends of each modem link are respectively connected to the baseband control unit and the radio frequency front end; A baseband control unit, configured to send reference time information to the clock control unit; the reference time information includes second pulses and a standard clock; A clock control unit is used to obtain the reference time information sent by the baseband control unit, train the reference time information to obtain the device clock, synchronize the device clock to each of the modulation and demodulation links; and generate a time slot signal based on the reference time information; the clock control unit synchronizes the time slot signal to the baseband control unit and the RF front end respectively.

[0020] In some embodiments, the reference time information includes second pulses and standard clocks. Second pulses and standard clocks are used in many fields to provide accurate time references to ensure synchronization and precise operation of systems or devices. For example, they are widely used in the fields of communications, navigation, computer systems, etc.

[0021] The process of training the reference time information includes locking, following and calibrating the reference time information.

[0022] The baseband control unit generates the reference time information using its own related components and sends it to the clock control unit. In the process of sending the reference time information to the clock control unit, jitter may occur due to noise and interference, changes in system processing delays, or characteristics of the transmission medium, resulting in a short-term deviation between the actual timing and the ideal timing. Therefore, after obtaining the reference time information, the clock control unit needs to first lock, follow, and calibrate it to obtain the device clock, so as to align the device clock with the standard clock in the reference time information.

[0023] In an optional embodiment, the baseband control unit includes a crystal oscillator and a Beidou timing module to generate the second pulse and the standard clock.

[0024] In some embodiments, a constant temperature crystal oscillator provides a stable frequency source, which is provided to the Beidou timing module to generate a second pulse (i.e., 1PPS) and a standard clock. In the field of communication with high precision requirements, it is used to solve the problem of time synchronization.

[0025] In an optional embodiment, the baseband control unit is used to generate second time slot information based on reference time information, and compare the first time slot information with its own second time slot information. If the two are consistent, the data corresponding to the next time slot of the second time slot information is sent to the baseband modulation and demodulation digital channel.

[0026] In some embodiments, the baseband control unit compares its own second time slot information with the first time slot information of the baseband modem digital path. If the two are consistent, it means that the current time slots of the two are synchronized, and subsequent operations can continue. For example, the baseband control unit sends the data corresponding to the next time slot of the second time slot information to the baseband modem digital path. If the two are inconsistent, it means that the baseband control unit and the baseband modem digital path are no longer synchronized, and the time slots need to be realigned to achieve synchronization.

[0027] The above-mentioned method of realigning the time slots is a process in which the baseband control unit resends new reference time information, and the clock control unit regenerates the time slots and synchronizes.

[0028] In an optional embodiment, the baseband control unit is further configured to resend the reference time information to the clock control unit at intervals of a second preset time length to perform time slot calibration.

[0029] In some embodiments, the time slot is calibrated once every second preset time period, so as to avoid clock anomalies during the transmission process, thereby preventing the base station from being asynchronous internally.

[0030] The second preset time length may be set based on actual conditions. For example, when the time slot is 30 ms, the second preset time length may be 6 seconds; when the time slot is 15 ms, the second preset time length may be 3 seconds.

[0031] In an optional embodiment, the clock control unit includes a clock training module and a control module; The clock training module is used to lock, follow and calibrate the reference time information to obtain a device clock, and synchronize the device clock to each of the modulation and demodulation links; The control module is used to generate a time slot signal based on the reference time information.

[0032] In some embodiments, the standard clock in the reference time information is calibrated by the clock training module, etc., so that the jitter in the transmission process can be removed, and the obtained device clock can be synchronized to each modem link, so that each modem link can be synchronized. The control module determines the sending time of the time slot signal according to the correspondence between 1PPS and the standard clock. For example, at 0:00:00, corresponding to the first 1PPS, the time slot is sent according to the preset duration (for example: 30ms), then every 6 seconds, it is aligned with the 1PPS once, and a new time slot signal is sent.

[0033] In an optional embodiment, the clock control unit is also used to obtain the air interface advance; and after obtaining the air interface advance of the reference time information, send the first time slot signal to the baseband control unit and the RF front end respectively, and send a time slot signal to the baseband control unit and the RF front end every first preset time interval.

[0034] In some embodiments, there may be delays during data transmission, such as processing delays, interface delays, etc. The delays can be overcome by obtaining the air interface advance and sending the time slot signal in advance or after the length of the air interface advance.

[0035] The above air interface advance amount can be obtained through actual measurement.

[0036] In one embodiment of the present application, a synchronization method for a multi-carrier base station is provided, and the method can be applied to any form of electronic equipment, such as the clock control unit in the multi-carrier base station described in the above embodiment. Figure 2 As shown, the synchronization method of the multi-carrier base station includes: Step 201, obtaining reference time information sent by a baseband control unit, training the reference time information to obtain a device clock, synchronizing the device clock to each of the modulation and demodulation links; and generating a time slot signal based on the reference time information; the reference time information includes a second pulse and a standard clock; Step 202: synchronize the time slot signal to the baseband control unit and the radio frequency front end respectively.

[0037] In an optional embodiment, synchronizing the time slot signal to the baseband control unit and the radio frequency front end respectively includes: Obtaining an air interface advance; after obtaining the air interface advance of the reference time information, sending a first time slot signal to the baseband control unit and the RF front end respectively, and sending a time slot signal to the baseband control unit and the RF front end every first preset time interval.

[0038] In a specific embodiment, the base station control unit in the multi-carrier base station of the present application uses a constant temperature crystal oscillator and has a Beidou timing chip to generate 1PPS and a standard clock (for example: 10M). The specific synchronization process includes: First, the baseband control unit sends 1PPS and the standard clock to the clock training module of the baseband modulation and demodulation path.

[0039] Second, the device clock (i.e., device_clk (e.g., 24M)) locked by the training clock module is sent to each modem link.

[0040] Third, the control module generates a time slot signal (i.e. slot_trig (e.g. 30ms / 15ms, etc.)) based on 1PPS and the standard clock. Fourth, the RF front end uses slot_trig as a trigger signal to synchronize the transmission of multiple channels and align the time slots. At the same time, it returns the time slot information of the multi-channel modulation and demodulation digital path to the baseband control unit, including the multi-frame number and the intra-frame number.

[0041] Through the above synchronization process, the baseband control unit, baseband modem digital path and radio frequency front end of the base station are aligned in time, thus avoiding air interface time slot misalignment and frame loss.

[0042] Accordingly, see Figure 3 The timing of each module provided, Figure 3 In the example, two time slots, each time slot is 30ms, are used for discussion. The time slot is calibrated every 6S, and a Trig signal is sent to the RF front end at the edge of each time slot to send a signal. At the same time, the current multi-frame number and time slot number are returned to the baseband control unit, so that the baseband control unit can compare its own time slot information to avoid frame loss, and prepare the next frame of data to be sent to the modem link. Figure 3 The air interface advance in the is composed of three parts: the first part is the air interface frame time delay caused by the distance between the terminal and the base station; the second part is the hard delay caused by the hardware path; the third part is the processing delay of the modulation and demodulation path; and the fourth part is the interface delay. Compensation is performed in this variable, and the air interface delay advance can be brought into the data according to the protocol requirements, so that the terminal can adjust the time slot. The above design can achieve real-time synchronization of the entire system between the modules of the base station and between the base station and the terminal.

[0043] Based on the same concept, an electronic device is also provided in the embodiment of the present application, such as Figure 4 As shown, the electronic device mainly includes: a processor 401, a memory 402 and a communication bus 403, wherein the processor 401 and the memory 402 communicate with each other through the communication bus 403. The memory 402 stores a program that can be executed by the processor 401, and the processor 401 executes the program stored in the memory 402 to implement the following steps: Acquire the reference time information sent by the baseband control unit, train the reference time information to obtain the device clock, synchronize the device clock to each of the modulation and demodulation links; and generate a time slot signal based on the reference time information; the reference time information includes a second pulse and a standard clock; The time slot signal is synchronized to the baseband control unit and the radio frequency front end respectively.

[0044] Optionally, synchronizing the time slot signal to the baseband control unit and the radio frequency front end respectively includes: Get the air interface advance; After acquiring the air interface advance of the reference time information, a first time slot signal is sent to the baseband control unit and the radio frequency front end respectively, and a time slot signal is sent to the baseband control unit and the radio frequency front end every first preset time length. The communication bus 403 mentioned in the above electronic device can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus. The communication bus 403 can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 4 Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0045] The memory 402 may include a random access memory (RAM) or a non-volatile memory, such as at least one disk memory. Optionally, the memory may also be at least one storage device located away from the processor 401 .

[0046] The above-mentioned processor 401 can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc., and can also be a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components.

[0047] In another embodiment of the present application, a computer-readable storage medium is provided, in which a computer program is stored. When the computer program is executed on a computer, the computer executes the multi-carrier base station synchronization method described in the above embodiment.

[0048] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented by software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer instruction is loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network or other programmable device. The computer instruction may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instruction is transmitted from a website site, a computer, a server or a data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium may be any available medium that a computer can access or a data storage device such as a server or a data center that includes one or more available media integrated. The available medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a tape, etc.), an optical medium (e.g., a DVD) or a semiconductor medium (e.g., a solid-state hard disk), etc.

[0049] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0050] The foregoing is merely a specific embodiment of the present invention, which enables those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A multi-carrier base station, characterized in that: include: Baseband control unit, baseband modem digital path and RF front end; The baseband modem digital path includes a plurality of modem links and a clock control unit; Two ends of each of the modulation and demodulation links are respectively connected to the baseband control unit and the radio frequency front end; A baseband control unit, configured to send reference time information to the clock control unit; The reference time information includes second pulse and standard clock; A clock control unit, configured to obtain reference time information sent by a baseband control unit, train the reference time information to obtain a device clock, synchronize the device clock to each of the modulation and demodulation links; and generate a time slot signal based on the reference time information; The clock control unit synchronizes the time slot signal to the baseband control unit and the radio frequency front end respectively.

2. The multi-carrier base station according to claim 1, characterized in that: The baseband control unit is used to generate the second time slot information according to the reference time information, and compare the first time slot information of the baseband modulation and demodulation digital path with its own second time slot information. If the two are consistent, the data corresponding to the next time slot of the second time slot information is sent to the baseband modulation and demodulation digital path.

3. The multi-carrier base station according to claim 1, characterized in that: The clock control unit is also used to obtain the air interface advance; and after obtaining the air interface advance of the reference time information, send the first time slot signal to the baseband control unit and the radio frequency front end respectively, and send a time slot signal to the baseband control unit and the radio frequency front end every first preset time interval.

4. The multi-carrier base station according to claim 1, characterized in that: The baseband control unit is further configured to resend the reference time information to the clock control unit at intervals of a second preset time length to perform time slot calibration.

5. The multi-carrier base station according to claim 1, characterized in that: The clock control unit includes a clock training module and a control module; The clock training module is used to lock, follow and calibrate the reference time information to obtain the device clock, and synchronize the device clock to each of the modulation and demodulation links; The control module is used to generate a time slot signal based on the reference time information.

6. The multi-carrier base station according to claim 1, characterized in that: The baseband control unit includes a constant temperature crystal oscillator and a Beidou timing module, which are used to generate the second pulse and the standard clock.

7. A synchronization method for a multi-carrier base station, characterized in that: Applied to the multi-carrier base station according to any one of claims 1 to 6, the method comprising: Acquire the reference time information sent by the baseband control unit through the clock control unit in the multi-carrier base station, train the reference time information to obtain the device clock, synchronize the device clock to each of the modulation and demodulation links; and generate a time slot signal based on the reference time information; the reference time information includes a second pulse and a standard clock; The time slot signal is synchronized to the baseband control unit and the radio frequency front end respectively through the clock control unit.

8. The synchronization method of a multi-carrier base station according to claim 7, characterized in that: The time slot signal is synchronized to the baseband control unit and the radio frequency front end respectively, including: Get the air interface advance; After acquiring the air interface advance of the reference time information, a first time slot signal is sent to the baseband control unit and the radio frequency front end respectively, and a time slot signal is sent to the baseband control unit and the radio frequency front end every first preset time length.

9. An electronic device, characterized in that: include: A processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other via the communication bus; The memory is used to store computer programs; The processor is used to execute the program stored in the memory to implement the synchronization method of the multi-carrier base station as described in any one of claims 7-8.

10. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the multi-carrier base station synchronization method according to any one of claims 7 to 8 is implemented.

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