Network access system based on 5G CPE

Abstract

The invention discloses a network access system based on 5G CPE. The network access system comprises a 5G cellular module and a small optical line terminal module, the 5G cellular module comprises a modulation-demodulation unit and an application processor unit; the application processor unit is connected with the small optical line terminal module through a network interface; the modulation and demodulation unit is used for receiving a 5G network signal sent by an operator base station and converting the received 5G network signal into a signal which can be used by user equipment; and the small optical line terminal module is used for managing network access of the optical network unit of the user equipment, performing photoelectric conversion on a signal which can be used by the user equipment after the optical network unit of the user equipment realizes network access, driving the optical splitter to emit light according to the converted signal, and sending the light to the user equipment. And the optical splitter transmits the converted signal to an optical network unit of the user equipment through an optical fiber. According to the invention, high-efficiency, low-cost and high-speed network access can be realized.

Description

Technical Field

[0001] The present invention relates to the field of wireless communication technologies, and in particular to a network access system based on 5G CPE. Background Art

[0002] For newly established communities, the network construction of operators lags behind the community network demand, especially in overseas countries such as Europe, the Middle East, and Africa, where there are generally sparse populations and vast land. If optical fiber is to be laid in these areas, it is difficult and costly, and operators cannot recover the cost in a short period of time. The existing solution is to install a 4 / 5G CPE device in each household, use the outdoor CPE to receive base station signals, and then convert them into local signals to access the Internet and provide network access for the family. However, this solution requires a one-time high cost for users. It is costly for each household to purchase a CPE device, and it does not conform to the European green and low-carbon concept. Summary of the invention

[0003] The present invention provides a network access system based on 5G CPE to solve the technical problem that the existing network access method requires each household to purchase a CPE device, which is costly.

[0004] In order to solve the above technical problems, an embodiment of the present invention provides a network access system based on 5G CPE, including: a power supply module, a 5G cellular module and a small optical line terminal module;

[0005] The 5G cellular module includes a modem unit and an application processor unit; the application processor unit is connected to the small optical line terminal module through a network interface;

[0006] The power supply module is used to supply power to the network access system;

[0007] The modulation and demodulation unit is used to receive the 5G network signal sent by the operator base station, demodulate the received 5G network signal, convert it into a signal that can be used by the user equipment, modulate the signal sent by the user equipment, and then transmit the modulated signal to the operator base station;

[0008] The application processor unit is used to forward the signal available for the user equipment to the small optical line terminal module, and receive the signal sent by the user equipment through the small optical line terminal module;

[0009] The small optical line terminal module is used to manage the network access of the optical network unit of the user equipment, and after the optical network unit of the user equipment achieves network access, it converts the signal that can be used by the user equipment into photoelectric conversion, and then drives the preset splitter to emit light according to the converted signal, so that the splitter transmits the converted signal to the optical network unit of the user equipment through the optical fiber.

[0010] As a preferred solution, the demodulating the received 5G network signal and converting it into a signal that can be used by the user equipment includes:

[0011] Filter the received 5G network signal to remove signals other than the preset frequency in the 5G network signal;

[0012] Performing low noise amplification processing on the filtered 5G network signal to amplify the 5G network signal;

[0013] Demodulate the 5G network signal after low noise amplification processing, and remove the carrier signal in the 5G network signal;

[0014] Performing analog-to-digital conversion on the demodulated 5G network signal to convert the 5G network signal into a corresponding digital signal;

[0015] The 5G network signal after the analog-to-digital conversion is decoded to remove redundant coding and error correction codes in the 5G network signal, and the 5G network signal is digitally decrypted to obtain a signal that can be used by the user device.

[0016] As a preferred solution, the step of modulating the signal sent by the user equipment includes:

[0017] Encode the signal sent by the user equipment, encrypt the signal sent by the user equipment, and add a preset redundant code and error correction code to the encrypted signal;

[0018] Performing digital-to-analog conversion on the signal sent by the user equipment after the encoding process, converting the signal sent by the user equipment into a corresponding analog signal;

[0019] Modulating the signal sent by the user equipment after the digital-to-analog conversion, adding a carrier to the signal sent by the user equipment, and modulating the signal to a preset frequency band;

[0020] Performing power amplification processing on the signal sent by the user equipment after the modulation processing, so as to amplify the signal sent by the user equipment;

[0021] The signal sent by the user equipment after the power amplification processing is filtered to remove the signal other than the preset frequency in the signal.

[0022] As a preferred solution, the 5G cellular module further includes: an antenna unit, a radio frequency power amplifier unit, a power supply unit and a memory;

[0023] The antenna unit is used to wirelessly connect to the operator base station, send the 5G network signal sent by the operator base station to the modem unit, and transmit the signal modulated by the modem unit to the operator base station;

[0024] The RF power amplifier unit is used to amplify the signal modulated by the modulation and demodulation unit, so that the antenna unit transmits the amplified signal to the operator base station;

[0025] The power supply unit is used to supply power to the 5G cellular module;

[0026] The memory is used to store data in the 5G cellular module.

[0027] As a preferred solution, the small optical line terminal module includes: an OLT unit;

[0028] The OLT unit is used to communicate with the application processor unit and manage the network access of the optical network unit of the user equipment.

[0029] As a preferred solution, the small optical line terminal module further includes: an optical driving unit;

[0030] The OLT unit is further used to transmit a signal that can be used by the user equipment to the optical drive unit;

[0031] The optical driving unit is used to amplify the signal that can be used by the user equipment.

[0032] As a preferred solution, the small optical line terminal module further includes: a BOSA unit;

[0033] The optical drive unit is further used to send the amplified signal that can be used by the user equipment to the BOSA unit, amplify the signal sent by the BOSA unit, and then transmit the amplified signal to the OLT unit;

[0034] The BOSA unit is used to drive a preset splitter to emit light according to the amplified signal available to the user device, so that the splitter transmits the converted signal to the optical network unit of the user device through the optical fiber, and performs photoelectric conversion on the signal sent by the user device, and then transmits the converted signal sent by the user device to the optical driving unit.

[0035] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0036] The present invention provides a network access system based on 5G CPE, which includes: a power supply module, a 5G cellular module and a small optical line terminal module; the 5G cellular module includes a modulation and demodulation unit and an application processor unit; the application processor unit is connected to the small optical line terminal module through a network interface; the power supply module is used to power the network access system; the modulation and demodulation unit is used to receive a 5G network signal sent by an operator base station, demodulate the received 5G network signal, convert it into a signal that can be used by a user device, and modulate the signal sent by the user device, and then transmit the modulated signal to the operator base station; the application processor unit is used to forward the signal that can be used by the user device to the small optical line terminal module, and receive the signal sent by the user device through the small optical line terminal module; the small optical line terminal module is used to manage the network access of the optical network unit of the user device, and after the optical network unit of the user device realizes network access, the signal that can be used by the user device is converted into photoelectricity, and then the preset splitter is driven to emit light according to the converted signal, so that the splitter transmits the converted signal to the optical network unit of the user device through the optical fiber.

[0037] In the network access system of the present invention, a power supply module, a 5G cellular module and a small optical line terminal module are included, and the power supply module is used to power the overall system; the modulation and demodulation unit of the 5G cellular module receives the 5G network signal sent by the operator base station to realize the access of the 5G network signal; the small optical line terminal module manages the network access of the optical network unit of the user equipment, and after the optical network unit of the user equipment realizes network access, drives the optical splitter to transmit the signal available for the user equipment to the optical network unit of the user equipment through optical fiber, and can use the existing optical fiber coverage of the building, and avoid installation and wiring (generally, the construction of the community will lay internal optical fiber to realize optical fiber to the home, but it does not communicate with the external Internet), and through the optical splitter, it is connected to the optical network unit of each house to realize the network access of each user. Through the present invention, it is not necessary for each household to install 4 / 5G CPE equipment. It only needs to install a network access system of the present invention in the community, and the system can be connected to the optical network unit of each house to realize the network access of each user. It can connect multiple optical network units and realize the network access of multiple users at the same time, realizing high-efficiency, low-cost, and high-speed network access. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a structural diagram of a 5G CPE-based network access system provided by an embodiment of the present invention;

[0039] Figure 2is a circuit block diagram of the CPE power supply interface of the present invention;

[0040] Figure 3 It is a schematic diagram of the structure of the 5G cellular module;

[0041] Figure 4 It is the schematic diagram of 5G cellular modulation and demodulation;

[0042] Figure 5 It is a schematic diagram of the actual application of the design system of the present invention in a community. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solutions and advantages of this application clearer, the technical solutions in this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0044] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0045] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0046] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0047] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0048] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0049] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0050] Embodiment 1

[0051] Please refer to Figure 1 , is a structural diagram of a 5G CPE-based network access system provided by an embodiment of the present invention, including: a power supply module, a 5G cellular module and a small optical line terminal module;

[0052] The 5G cellular module includes a modem unit and an application processor unit; the application processor unit is connected to the small optical line terminal module through a network interface;

[0053] The power supply module is used to supply power to the network access system;

[0054] The modulation and demodulation unit is used to receive the 5G network signal sent by the operator base station, demodulate the received 5G network signal, convert it into a signal that can be used by the user equipment, modulate the signal sent by the user equipment, and then transmit the modulated signal to the operator base station;

[0055] The application processor unit is used to forward the signal available for the user equipment to the small optical line terminal module, and receive the signal sent by the user equipment through the small optical line terminal module;

[0056] The small optical line terminal module is used to manage the network access of the optical network unit of the user equipment, and after the optical network unit of the user equipment achieves network access, it converts the signal that can be used by the user equipment into photoelectric conversion, and then drives the preset splitter to emit light according to the converted signal, so that the splitter transmits the converted signal to the optical network unit of the user equipment through the optical fiber.

[0057] For details, please refer to Figure 2, which is a circuit block diagram of the CPE power supply interface of the present invention. The present invention uses a high-performance 5G CPE to achieve network access. The equipment is installed on the roof of the community and is powered by solar panels. The network uses 5G cellular to achieve network access. The downlink port uses the FTTR (Fiber to The Room) principle to connect the Mini-OLT module (Mini optical line terminal), and uses the existing optical fiber coverage of the building to avoid installation and wiring (generally, community construction will lay internal optical fibers to achieve fiber to the home, but it does not communicate with the external Internet). Through a splitter, it is connected to the ONU (Optical Network Unit) of each house to achieve network access for each user.

[0058] The circuit principle of the design system of the present invention is as follows Figure 1 , mainly divided into three parts. The first part is the power supply module, which is mainly composed of solar panels. The device is powered by solar energy and equipped with batteries to meet the power supply needs of the equipment at night and on rainy days; the second part is the 5G cellular module, which mainly uses 5G cellular modules and 5G antennas to realize the 5G network access function; the third part is the Mini-OLT module, which is mainly Mini-OLT chip and BOSA (Bidirectional Optical Assembly) to realize the downlink user ONU access.

[0059] The following Figure 1 Annotate the nouns in:

[0060] ANT:Antenna;

[0061] RF: Rad lio Frcqucncy radio frequency;

[0062] SIM: sim card;

[0063] LED: light emitting diode;

[0064] KEY: control button;

[0065] HSGMII: High-Speed ​​Serial Gigabit Media Independent Interface;

[0066] AP processor; application processor;

[0067] Mini-OLT: small optical line terminal;

[0068] BOSA: Single Fiber Bidirectional Assemblies.

[0069] Among them, the LEDs include POWER LED, 4G LED, 5G LED and signal strength LED. In a specific embodiment, the POWER LED is used to display the power-on status of the device. When the device is powered on, the LED will be on, otherwise it will not be on. The 4G LED is used to display whether the device is connected to the 4G network. If so, the LED will be on, otherwise it will not be on. The 5G LED is used to display whether the device is connected to the 5G network. If so, the LED will be on, otherwise it will not be on. The signal strength LED is used to display the signal strength of the device. If the signal is good, the green LED will be on, if the signal is average, the orange LED will be on, and if the signal is poor, the red LED will be on. The KEY button is used to restore the factory settings of the user. By pressing and holding for 6S, the device will be restored to the factory state. The TYPE-C interface is used to produce burning software, and is used for device debugging when the device is abnormal.

[0070] Preferably, the demodulating the received 5G network signal and converting it into a signal that can be used by the user equipment includes: filtering the received 5G network signal to eliminate signals other than preset frequencies in the 5G network signal; performing low-noise amplification processing on the filtered 5G network signal to amplify the 5G network signal; demodulating the 5G network signal after the low-noise amplification processing to eliminate the carrier signal in the 5G network signal; performing analog-to-digital conversion processing on the demodulated 5G network signal to convert the 5G network signal into a corresponding digital signal; decoding the 5G network signal after the analog-to-digital conversion processing to remove redundant coding and error correction code in the 5G network signal, and digitally decrypting the 5G network signal to obtain a signal that can be used by the user equipment.

[0071] Preferably, the modulating the signal sent by the user equipment includes: encoding the signal sent by the user equipment, encrypting the signal sent by the user equipment, and adding preset redundant coding and error correction code to the encrypted signal; performing digital-to-analog conversion on the signal sent by the user equipment after the encoding processing, converting the signal sent by the user equipment into a corresponding analog signal; modulating the signal sent by the user equipment after the digital-to-analog conversion processing, adding a carrier to the signal sent by the user equipment, and modulating the signal to a preset frequency band; performing power amplification processing on the signal sent by the user equipment after the modulation processing, and amplifying the signal sent by the user equipment; and filtering the signal sent by the user equipment after the power amplification processing, and eliminating signals other than the preset frequency in the signal.

[0072] For details, please refer to Figure 3 , is a structural diagram of the 5G cellular module, which inserts the operator's SIM card and accesses the Internet through the operator's base station to provide network for users.

[0073] The 5G cellular part is specifically divided into the AP (Application Processor) side and the modem (modulation and demodulation) side. The modem side is responsible for receiving and decoding the 5G signal sent by the base station, and then converting the data into a data stream format that can be used by the user device (generally speaking, the data stream received by the modem is wirelessly encrypted and has redundant check bits added, while the user's business data stream is plain text data sent byte by byte (8 bits per byte)). At the same time, it also encodes and modulates the data sent by the user device, and then transmits it back to the operator's 5G network.

[0074] Specifically, the principles of 5G cellular modulation and demodulation are as follows: Figure 4 ,5G cellular modulation and demodulation,The demodulation receiving process is that after the modem receives the signal sent by the base station through the antenna, it filters out other signals through the filter, retains only the corresponding frequency to be received, and further amplifies the received signal through the low noise amplifier, enters the demodulation circuit, and further demodulates the amplified modulated signal, that is, removes the carrier signal and retains the original signal, and then enters the ADC (Ana log-to-Digital Converter) for sampling, converting the analog signal into a digital signal, and then the digital signal enters the decoder. The function of the decoder is to remove the redundant coding, error correction code, digital encryption, etc. added in the wireless transmission, leaving the content that the user actually transmits.

[0075] The process of modulation and transmission is exactly the opposite of demodulation. The content that the user needs to send passes through the encoder, which encrypts the transmission content and adds redundant coding and error correction code that are conducive to wireless transmission. Then it enters the DAC (Digital-to-Ana log Converter) to convert the digital signal into an analog signal. Then it enters the modulation circuit, adds the current analog signal to the carrier, and modulates it to a higher frequency band to make it more conducive to wireless transmission. At the same time, the modulated signal enters the power amplifier to further amplify the signal so that it can be transmitted farther. At the same time, the amplified signal passes through the filter to filter out the spurious frequencies introduced by other circuits so as not to interfere with the operation of other devices. Then the signal coming out of the filter is transmitted through the antenna.

[0076] The AP side is responsible for processing and forwarding data streams, and connects to the Mini-OLT unit through the network interface. It manages and restricts downstream ONU access through the OMCI (Optical Network Unit Management and Control Interface) protocol, that is, ONUs in the whitelist can access the system, and ONUs not in the whitelist are restricted from access.

[0077] Preferably, the 5G cellular module also includes: an antenna unit, a radio frequency power amplifier unit, a power supply unit and a memory; the antenna unit is used to wirelessly connect to the operator base station, send the 5G network signal sent by the operator base station to the modem unit, and transmit the signal modulated by the modem unit to the operator base station; the radio frequency power amplifier unit is used to amplify the signal modulated by the modem unit so that the antenna unit transmits the amplified signal to the operator base station; the power supply unit is used to power the 5G cellular module; the memory is used to store data in the 5G cellular module.

[0078] In addition to AP and modem, other key components of the 5G cellular part include antenna system, RF power amplifier, power supply, memory and network interface. The antenna system is responsible for receiving and sending 5G signals to ensure that the device can establish a stable wireless connection with the 5G base station; the RF power amplifier is responsible for amplifying the data stream from the modem so that it can be better received by the distant base station; the power supply is responsible for providing power for the entire 5G cellular and RF power amplifier; the memory is responsible for storing and caching data to ensure the efficient performance of the equipment; the network interface is responsible for connecting to the Mini-OLT, thereby providing Internet access services for downstream ONU access.

[0079] Preferably, the small optical line terminal module comprises: an OLT unit; the OLT unit is used to communicate with the application processor unit and manage the network access of the optical network unit of the user equipment.

[0080] Preferably, the small optical line terminal module further includes: an optical driving unit; the OLT unit is further used to transmit a signal that can be used by the user equipment to the optical driving unit; the optical driving unit is used to amplify the signal that can be used by the user equipment.

[0081] Preferably, the small optical line terminal module also includes: a BOSA unit; the optical driving unit is also used to send the amplified signal that can be used by the user equipment to the BOSA unit, and amplify the signal sent by the BOSA unit, and then transmit the amplified signal to the OLT unit; the BOSA unit is used to drive a preset splitter to emit light according to the amplified signal that can be used by the user equipment, so that the splitter transmits the converted signal to the optical network unit of the user equipment through the optical fiber, and performs photoelectric conversion on the signal sent by the user equipment, and then transmits the converted signal sent by the user equipment to the optical driving unit.

[0082] For the Mi ni-OLT part, refer to Figure 1Its uplink is connected to the 5G cellular side AP processor through the HSGMII (High Ser ia l Gigabit Med iumIndependent Interface) interface. The Mini-OLT part can be specifically divided into the OLT unit, the optical drive unit and the BOSA part.

[0083] Among them, the OLT unit communicates with the 5G cellular AP side through the OMCI (Optical Network Unit Management and Control Interface, i.e. ONU Management and Control Interface) protocol to manage the downstream ONU access, including configuration management, fault management, performance management and security management. Among them, configuration management includes configuring the network parameters of the ONU, updating software, starting / closing network services, that is, which ONUs are allowed to access and how much bandwidth rate is allocated to the corresponding ONU. Generally, the SN and MAC address of the downstream ONU are added to the OLT whitelist and the maximum access rate is configured. Fault management includes link detection, such as checking the offline of the downstream ONU and network abnormalities. It is generally used to detect ONU abnormalities through periodic heartbeat connection with the ONU and arrange on-site troubleshooting. Performance management mainly detects the quality of optical signals and transmission rates to ensure the stability and quality of network services. It detects fault problems by detecting the strength of optical signals, statistical data packet loss rate, number of retransmissions, etc. Security management includes ONU identity authentication, data encryption communication, etc. to ensure the security of ONU and network, which is generally achieved through data encryption and firewall.

[0084] The optical drive unit is responsible for amplifying the signal sent by the OLT unit to better drive the BOSA to emit light. At the same time, it amplifies the signal received by the BOSA to enter the OLT unit. The BOSA transceiver part includes optical transmitting and optical receiving devices. The transmitting optical component converts the electrical signal from the optical drive unit into photoelectric conversion, drives the laser to emit light, and enters the optical fiber transmission. The receiving optical component is responsible for detecting and receiving the optical signal sent from the optical fiber, and converting it into photoelectric conversion. After being converted into an electrical signal, it enters the optical drive unit, is amplified, and is transmitted to the OLT unit after amplification.

[0085] Please refer to Figure 5 , which is a schematic diagram of the actual application of the system designed by the present invention in a residential area. The device can hang up to 128 ONU devices, basically covering the entire residential building in the community, achieving high-efficiency, low-cost, and high-speed network access.

[0086] It can be seen that the present invention provides a network access system based on 5G CPE. In the network access system of the present invention, a power supply module, a 5G cellular module and a small optical line terminal module are included. The power supply module is used to power the entire system; the modulation and demodulation unit of the 5G cellular module receives the 5G network signal sent by the operator base station to realize the access of the 5G network signal; the small optical line terminal module manages the network access of the optical network unit of the user equipment, and after the optical network unit of the user equipment realizes network access, drives the optical splitter to transmit the signal available for the user equipment to the optical network unit of the user equipment through optical fiber, and can use the existing optical fiber coverage of the building, without installing wiring (generally, the construction of the community will lay internal optical fiber to realize fiber to the home, but it does not communicate with the external Internet), and through the optical splitter, it is connected to the optical network unit of each house to realize the network access of each user. Through the present invention, it is not necessary for each household to install 4 / 5G CPE equipment. It only needs to install a network access system of the present invention in the community. The system can be connected to the optical network unit of each house to realize the network access of each user. It can connect multiple optical network units and realize the network access of multiple users at the same time, realizing high-efficiency, low-cost, and high-speed network access.

[0087] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A network access system based on 5G CPE, characterized in that: include: Power supply modules, 5G cellular modules, and small optical line terminal modules; The 5G cellular module includes a modem unit and an application processor unit; The application processor unit is connected to the small optical line terminal module via a network interface; The power supply module is used to supply power to the network access system; The modulation and demodulation unit is used to receive the 5G network signal sent by the operator base station, demodulate the received 5G network signal, convert it into a signal that can be used by the user equipment, modulate the signal sent by the user equipment, and then transmit the modulated signal to the operator base station; The application processor unit is used to forward the signal available for the user equipment to the small optical line terminal module, and receive the signal sent by the user equipment through the small optical line terminal module; The small optical line terminal module is used to manage the network access of the optical network unit of the user equipment, and after the optical network unit of the user equipment achieves network access, it converts the signal that can be used by the user equipment into photoelectric conversion, and then drives the preset splitter to emit light according to the converted signal, so that the splitter transmits the converted signal to the optical network unit of the user equipment through the optical fiber.

2. The 5G CPE-based network access system according to claim 1, characterized in that: The demodulating the received 5G network signal and converting it into a signal that can be used by the user equipment includes: Filter the received 5G network signal to remove signals other than the preset frequency in the 5G network signal; Performing low noise amplification processing on the filtered 5G network signal to amplify the 5G network signal; Demodulate the 5G network signal after low noise amplification processing, and remove the carrier signal in the 5G network signal; Performing analog-to-digital conversion on the demodulated 5G network signal to convert the 5G network signal into a corresponding digital signal; The 5G network signal after the analog-to-digital conversion is decoded to remove redundant coding and error correction codes in the 5G network signal, and the 5G network signal is digitally decrypted to obtain a signal that can be used by the user device.

3. The 5G CPE-based network access system according to claim 2, characterized in that: The modulating the signal sent by the user equipment includes: Encode the signal sent by the user equipment, encrypt the signal sent by the user equipment, and add a preset redundant code and error correction code to the encrypted signal; Performing digital-to-analog conversion on the signal sent by the user equipment after the encoding process, converting the signal sent by the user equipment into a corresponding analog signal; Modulating the signal sent by the user equipment after the digital-to-analog conversion, adding a carrier to the signal sent by the user equipment, and modulating the signal to a preset frequency band; Performing power amplification processing on the signal sent by the user equipment after the modulation processing, so as to amplify the signal sent by the user equipment; The signal sent by the user equipment after the power amplification processing is filtered to remove the signal other than the preset frequency in the signal.

4. The 5G CPE-based network access system according to claim 1, characterized in that: The 5G cellular module further includes: an antenna unit, a radio frequency power amplifier unit, a power supply unit and a memory; The antenna unit is used to wirelessly connect to the operator base station, send the 5G network signal sent by the operator base station to the modem unit, and transmit the signal modulated by the modem unit to the operator base station; The RF power amplifier unit is used to amplify the signal modulated by the modulation and demodulation unit, so that the antenna unit transmits the amplified signal to the operator base station; The power supply unit is used to supply power to the 5G cellular module; The memory is used to store data in the 5G cellular module.

5. The 5G CPE-based network access system according to claim 1, characterized in that: The small optical line terminal module comprises: an OLT unit; The OLT unit is used to communicate with the application processor unit and manage the network access of the optical network unit of the user equipment.

6. The 5G CPE-based network access system according to claim 5, characterized in that: The small optical line terminal module further includes: an optical drive unit; The OLT unit is further used to transmit a signal that can be used by the user equipment to the optical drive unit; The optical driving unit is used to amplify the signal that can be used by the user equipment.

7. The 5G CPE-based network access system according to claim 6, characterized in that: The small optical line terminal module further includes: a BOSA unit; The optical drive unit is further used to send the amplified signal that can be used by the user equipment to the BOSA unit, amplify the signal sent by the BOSA unit, and then transmit the amplified signal to the OLT unit; The BOSA unit is used to drive a preset splitter to emit light according to the amplified signal available to the user device, so that the splitter transmits the converted signal to the optical network unit of the user device through the optical fiber, and performs photoelectric conversion on the signal sent by the user device, and then transmits the converted signal sent by the user device to the optical driving unit.

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