Portable multi-operator 4G / 5G signal generation device and method based on Wi-Fi signal conversion

Abstract

The invention discloses a portable multi-operator 4G / 5G signal generation device and method based on Wi-Fi signal conversion. The portable multi-operator 4G / 5G signal generation device comprises a Wi-Fi signal receiving module; a signal conversion processing module; a radio frequency front end module; a power management module; a user interaction module; and the core control system is connected with the Wi-Fi signal receiving module, the signal conversion processing module, the radio frequency front-end module, the power management module and the user interaction module. Through the Wi-Fi signal receiving module, the signal conversion processing module, the radio frequency front-end module and the like, seamless conversion from a Wi-Fi signal to a 4G / 5G signal is realized, an external antenna or broadband configuration is not needed, high portability, aesthetic property and usability are realized, the problem that traditional repeater equipment depends on a macro station signal, an external antenna and complex configuration is solved, and the system is suitable for popularization and application. The method can still be used in basements, remote areas and other scenes, and multi-system mobile communication signal coverage enhancement in families, indoor spaces and temporary scenes is facilitated.

Description

Technical Field

[0001] This invention belongs to the field of wireless communication technology, specifically relating to a portable multi-carrier 4G / 5G signal generation device and method based on Wi-Fi signal conversion. Background Technology

[0002] Indoor mobile communication signal coverage quality is a key factor affecting users' communication experience. Especially in scenarios such as high-rise buildings, basements, and enclosed conference rooms, macro base station signals are easily blocked, leading to attenuation and creating coverage blind spots or weak areas.

[0003] In the field of wireless communication, various types of repeaters are commonly used to supplement signal amplification and signal extension for indoor signal coverage. Traditional repeater equipment, as a common means of enhancing indoor signals, has the following significant drawbacks: 1) Dependent on macro base station signals: It needs to receive signals from surrounding macro base stations. If the macro base station signal is weak or blocked, the signal shielding is too large, and it cannot work effectively. 2) External antenna requirement: An external antenna needs to be installed to receive and transmit signals, which will affect the aesthetics of the room and the installation location is limited; 3) Complex configuration: Some devices require broadband access for parameter configuration, which is difficult for non-professional users to complete independently; 4) Poor portability: The device is large in size and consumes a lot of power, requiring a fixed power supply and cannot be moved or used flexibly.

[0004] While existing technologies offer solutions for achieving network coverage via Wi-Fi relay, none have solved the technical challenge of directly converting Wi-Fi signals into multi-carrier 4G / 5G signals, thus failing to meet users' communication needs for multi-standard and multi-carrier compatibility.

[0005] The core limitation of existing technologies lies in the fact that none of them have broken through the framework of "relying on macro base station signals" or "supporting only a single network standard," and they cannot simultaneously achieve portability, ease of use, and multi-carrier compatibility. There is currently no effective solution for the need for "plug-and-play" multi-carrier 4G / 5G signal coverage in scenarios such as temporary offices, homes, and field operations. Summary of the Invention

[0006] To address the problems in the prior art, the present invention aims to provide a portable multi-carrier 4G / 5G signal generation device and method based on Wi-Fi signal conversion.

[0007] To achieve the above objectives and technical effects, the technical solution adopted by this invention is as follows: A portable multi-carrier 4G / 5G signal generation device based on Wi-Fi signal conversion, comprising: The Wi-Fi signal receiving module is used to receive signals sent by routers or mobile terminals and forward signals generated by other terminals connected to the Wi-Fi signal receiving module to the corresponding target devices. The signal conversion and processing module is used to perform bidirectional conversion between Wi-Fi signals and 4G / 5G signals, user terminal interaction, and signal conversion with corresponding uplink Wi-Fi devices; RF front-end module; Power management module; User interaction module; The core control system is connected to the Wi-Fi signal receiving module, signal conversion and processing module, RF front-end module, power management module, and user interaction module.

[0008] Furthermore, the Wi-Fi signal receiving module adopts a high-performance Wi-Fi chip, integrates a low-noise amplifier and a bandpass filter, is compatible with IEEE 802.11a / b / g / n / ac / ax protocols, supports simultaneous reception of 2.4GHz and 5GHz dual-band, has a maximum receiving sensitivity of ≤-96dBm, a maximum bandwidth of 160MHz, and supports MU-MIMO reception.

[0009] Furthermore, the signal conversion and processing module includes: The baseband processing unit uses a multi-core ARM Cortex-A73 processor and a dedicated communication baseband chip, integrating a Wi-Fi protocol stack and a 4G / 5G protocol stack to realize Wi-Fi data frame parsing, 4G / 5G protocol stack encapsulation, modulation and demodulation; Multi-carrier support unit, integrating two programmable SIM card slots and an eSIM chip, with a built-in carrier parameter database; The intelligent frequency band selection unit is used to select the optimal frequency band from a preset frequency band library.

[0010] Furthermore, the radio frequency front-end module includes: The integrated antenna array has four built-in antennas, including a 2.4GHz / 5GHz dual-band Wi-Fi antenna and a 4G / 5G broadband antenna. It supports dynamic beamforming based on user location to improve signal quality in edge areas. Signal processing components, including transmit and receive links.

[0011] Furthermore, the power management module includes: The power supply unit has a built-in 5000mAh lithium polymer battery and supports 5V / 2A input charging; The power consumption control unit is used to automatically adjust the processor voltage and frequency according to the load to achieve energy consumption management.

[0012] Furthermore, the user interaction module includes a touch screen and a smart app.

[0013] This invention also discloses a portable multi-carrier 4G / 5G signal generation method based on Wi-Fi signal conversion, which uses a portable multi-carrier 4G / 5G signal generation device based on Wi-Fi signal conversion as described above, and includes the following steps: Step 1: Initialization Phase (1) After the device is powered on, the power management module detects the battery level. If it is ≥20%, it enters the working mode; otherwise, it triggers a charging prompt. (2) The baseband processing unit loads the Linux operating system and protocol stack, and the radio frequency front-end module completes the frequency band calibration with an error of ≤±1ppm; (3) The user interaction module starts, the touch screen displays the initialization interface, and the indicator light flashes. Step 2: Wi-Fi signal access and data parsing: (1) Automatic configuration mode: After the user presses and holds the one-key configuration button, the Wi-Fi signal receiving module scans the surrounding Wi-Fi networks, sorts them by signal strength, and selects the network with RSSI≥-85dBm; if a password is required, the user is prompted to enter it through the touch screen, and the configuration is saved after the connection is completed; (2) Manual configuration mode: Users can manually select a Wi-Fi network via the touch screen, enter the password, and establish a connection; (3) Data parsing: The Wi-Fi signal receiving module receives data frames, and after parsing by the baseband processing unit, it extracts IP layer data packets, performs verification, and caches them in memory with a cache capacity of ≥128MB; Step 3: 4G / 5G signal generation and transmission: (1) Protocol stack encapsulation: The baseband processing unit encapsulates IP layer data packets into 4G / 5G protocol stack data according to the 3GPP standard: 4G mode: Passes through PDCP layer, RLC layer, MAC layer, and PHY layer in sequence; 5G mode: Adds SDAP layer to support URLLC and eMBB service differentiation; (2) Frequency band selection: The intelligent frequency band selection unit is activated, and the target frequency band is determined by combining the preset operator frequency band priority and real-time monitoring data; (3) Radio frequency transmission: The baseband signal is sent to the radio frequency front-end module after digital-to-analog conversion, and after up-conversion, filtering and power amplification, it is transmitted through the built-in antenna array; Step 4: Multi-carrier network registration and management: (1) Carrier selection: Users select the target carrier through the touch screen, or select the carrier they have used most recently by default; (2) Parameter loading: The multi-carrier support unit calls the corresponding carrier's PLMN, APN, and authentication parameters from the database. If it is eSIM mode, it downloads the configuration file through Wi-Fi connection to the cloud server and uses HTTPS encrypted transmission. (3) Network registration: The baseband processing unit completes network registration according to the 3GPP registration process, and updates the operator information of the touch screen after successful registration; (4) Dynamic switching: When a user switches operators, the device automatically restarts the radio frequency link, reloads parameters and registers. The switching process takes ≤5 seconds. Step 5: Intelligent Optimization and Anomaly Handling (1) Real-time monitoring: Collect the following data at regular intervals: Wi-Fi link: throughput, packet loss rate; 4G / 5G link: RSRP, SINR, number of terminal accesses; Device status: battery level, chip temperature; (2) Exception handling: Wi-Fi interruption: Activate offline caching, rescan for Wi-Fi networks, and restore connection to resume data transmission; 4G / 5G registration failed: Automatically switch to backup frequency band. If it fails 3 times in a row, prompt the user to check the operator parameters. Low battery: Automatically reduces power to 15dBm to extend battery life and prompts you to charge.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) Get rid of macro station dependence: Through Wi-Fi signal receiving module, signal conversion and processing module, radio frequency front-end module, etc., the seamless conversion of Wi-Fi signal to 4G / 5G signal is realized. No external antenna or broadband configuration is required. It has high portability, aesthetics and ease of use. It aims to solve the problem of traditional repeater equipment relying on macro station signal, external antenna and complex configuration. It can still be used in basement, remote area and other scenarios, which facilitates the enhancement of multi-mode mobile communication signal coverage in home and indoor space and temporary scenarios. (2) High portability: The device has a volume of ≤15cm×15cm×5cm and a weight of ≤300g. It supports 8 hours of battery life and can be carried in a backpack, making it suitable for mobile scenarios such as home, meeting room, and field work. (3) Multi-carrier compatibility: Supports the full frequency bands of 4G / 5G of the three major carriers, and realizes dynamic switching of carriers through software definition to meet the needs of multi-card users and mixed networking; (4) Zero configuration threshold: The one-click configuration function automates Wi-Fi connection, operator registration, and frequency band selection. Non-professional users can complete the deployment within 3 minutes. (5) Beautiful and easy to use: The built-in antenna design has no exposed parts, making it suitable for home / office environments; the touch screen and indicator lights make the status visible and the operation intuitive; (6) Intelligent optimization: dynamic frequency band selection, power adjustment and anomaly handling mechanism to ensure stable signal coverage quality and reduce manual maintenance costs. Attached Figure Description

[0015] Figure 1 This is a structural block diagram of the present invention; Figure 2 This is a flowchart illustrating the startup and operation process of the present invention; Figure 3 This is a flowchart of the multi-carrier selection process of the present invention; Figure 4 This is a flowchart of Embodiment 1 of the present invention; Figure 5 This is a flowchart of Embodiment 2 of the present invention. Detailed Implementation

[0016] The present invention will now be described in detail so that its advantages and features can be more easily understood by those skilled in the art, thereby providing a clearer and more explicit definition of the scope of protection of the present invention.

[0017] The following provides a brief overview of one or more aspects to offer a basic understanding of them. This overview is not an exhaustive summary of all conceived aspects, nor is it intended to identify key or decisive elements of all aspects, nor to define the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form to prepare for the more detailed descriptions that follow.

[0018] like Figure 1-5 As shown, this invention discloses a portable multi-carrier 4G / 5G signal generation device and method based on Wi-Fi signal conversion, which is a more convenient and aesthetically pleasing indoor signal enhancement solution. It aims to solve the problems of traditional repeater equipment relying on macro station signals, external antennas and complex configurations. It can still be used in scenarios such as basements and remote areas, and facilitates the enhancement of multi-mode mobile communication signal coverage in homes, indoor spaces and temporary scenarios.

[0019] This invention discloses a portable multi-carrier 4G / 5G signal generation device based on Wi-Fi signal conversion, comprising: The Wi-Fi signal receiving module is used to receive signals sent by routers or mobile terminals and forward signals generated by other terminals connected to the Wi-Fi signal receiving module to the corresponding target devices. The signal conversion and processing module is used to perform bidirectional conversion between Wi-Fi signals and 4G / 5G signals, user terminal interaction, and signal conversion with corresponding uplink Wi-Fi devices; RF front-end module; Power management module; User interaction module; The core control system is connected to the Wi-Fi signal receiving module, signal conversion and processing module, RF front-end module, power management module, and user interaction module.

[0020] Wi-Fi signal receiving module: Hardware configuration: Employs a high-performance Wi-Fi chip (supporting 2×2 MIMO), integrating a low-noise amplifier and a bandpass filter; Protocol support: Compatible with IEEE 802.11a / b / g / n / ac / ax (Wi-Fi 6) protocol, supports simultaneous reception of dual-band 2.4GHz (channels 1-14) and 5GHz (channels 36-165); Performance parameters: Maximum receiver sensitivity ≤ -96dBm (5GHz, 802.11ax, 1024QAM), maximum bandwidth supports 160MHz, supports MU-MIMO reception; Security features: Supports encryption protocols such as WPA3 and WPA2-PSK, and has a built-in MAC address filtering function.

[0021] The signal conversion and processing module includes: Baseband processing unit: Employs a multi-core ARM Cortex-A73 processor (clock speed ≥ 2.0GHz) and a dedicated communication baseband chip (supporting 4G LTE Cat.16 / 5G NR SA / NSA); runs a customized Linux operating system, integrating Wi-Fi protocol stack (L2 / L3 layer) and 4G / 5G protocol stack (PHY / MAC / RLC / PDCP / RRC layer); Functions include: Wi-Fi data frame parsing (extracting IP layer data packets), 4G / 5G protocol stack encapsulation (completing data packet mapping according to 3GPP standards), and modulation / demodulation (supporting QPSK / 16QAM / 64QAM / 256QAM / 1024QAM). Multi-carrier support unit: Hardware: Integrates two programmable SIM card slots (supporting Nano-SIM) and an eSIM chip (compliant with GSMA specifications); Software: Built-in operator parameter database, including major operators such as China Mobile, China Unicom, and China Telecom. Network identifier (PLMN: MCC+MNC); Access point configuration (APN, username, password); Authentication parameters (EAP-SIM, AKA algorithm); Frequency band priority (e.g., China Mobile n41 / n78 priority, China Unicom B3 / B8 priority) Implementation method: Dynamically switch operator configurations by defining radio frequency parameters (center frequency, bandwidth, power) through software, with a switching time of ≤3s; Intelligent band selection unit: Input parameters: Real-time monitoring of RSSI (Received Signal Strength Indicator), SINR (Signal-to-Interference-Ratio), band load (number of access users), and interference level (adjacent channel interference power) of 4G / 5G bands. Decision logic: Based on a multi-objective optimization algorithm (weight allocation: SINR 40%, load 30%, interference 30%), the optimal frequency band is selected from the preset frequency band library (4G: B1 / B3 / B5 / B8 / B39; 5G: n1 / n41 / n78 / n79); Dynamic adjustment: The monitoring data is refreshed every 5 seconds. When the current frequency band SINR is ≤-3dB or the load is ≥80%, the frequency band switching is triggered. The switching process does not interrupt the existing connection (using seamless switching technology).

[0022] The radio frequency front-end module, as a signal input / output module, includes: The integrated antenna array has four built-in antennas (2T2R MIMO configuration) and adopts a PCB built-in design (hidden inside the device housing). The antenna types are: 2.4GHz / 5GHz dual-band Wi-Fi antenna (gain ≥3dBi) + 4G / 5G broadband antenna (1.8GHz-3.8GHz, gain ≥2dBi). Beamforming: It supports dynamic beamforming based on user location (estimates distance through TA value feedback from the terminal and adjusts the antenna phase) to improve signal quality in edge areas. Signal processing components: Transmit link: includes an upconverter (supporting frequency conversion in the 1.8GHz-3.8GHz band), a bandpass filter (to suppress spurious radiation and meet 3GPP TS 36.104 / 38.104 standards), and a power amplifier (PA, with adjustable output power from 0-23dBm in 1dB steps). Receive link (optional, for terminal signal monitoring): Low noise amplifier (LNA, noise figure ≤2dB), downconverter, ADC converter (16-bit, sampling rate ≥61.44MSPS).

[0023] The power management module is the module that supplies power to the above modules, including: The power supply unit has a built-in 5000mAh lithium polymer battery (3.7V) and supports 5V / 2A input charging (Type-C interface). Power consumption control unit: Power consumption control: Dynamic Voltage and Frequency Scaling (DVFS): Automatically adjusts processor voltage (0.8V-1.2V) and frequency (500MHz-2GHz) according to the load; Power management: When no terminal is connected, the RF front end automatically enters sleep mode, and the power consumption drops to below 0.5W; when a terminal is connected, it wakes up within 100ms. Battery life: When fully charged, it can work continuously for 8 hours in single-carrier 4G mode (10 terminals connected) and 6 hours in 5G mode.

[0024] The user interaction module provides a good and reliable user experience through an interactive interface, including: Touchscreen display: A 2.4-inch TFT touchscreen with a resolution of 320×240 displays the following content: Network status: Wi-Fi connection strength (RSSI), 4G / 5G signal strength (RSRP), current carrier, number of connected devices; Operating parameters: Transmitter frequency band, output power, battery level, and operating time; Configuration menu: Wi-Fi connection settings, carrier selection, manual / automatic band mode switching; Physical buttons: One-click configuration button: Press and hold for 3 seconds to trigger automatic configuration (scan and connect to the strongest Wi-Fi, register the default carrier, and automatically select the frequency band); Power button: Short press to wake / sleep, long press for 3 seconds to turn on / off; Status indicator lights: 3-color LEDs (red / green / blue) to indicate power status (red: low battery; green: full charge), Wi-Fi connection status (blue: connected; flashing: connecting), and 4G / 5G working status (green: normal; flashing: registering). The smart app allows for remote configuration and management of the device after connecting via the device's network. It includes functions such as carrier selection, online user query, Wi-Fi connection configuration, and status monitoring.

[0025] This invention also discloses a portable multi-carrier 4G / 5G signal generation method based on Wi-Fi signal conversion, which uses a portable multi-carrier 4G / 5G signal generation device based on Wi-Fi signal conversion as described above, and includes the following steps: Step 1: Initialization Phase (1) After the device is powered on, the power management module detects the battery level. If it is ≥20%, it enters the working mode; otherwise, it triggers a charging prompt. (2) The baseband processing unit loads the Linux operating system and protocol stack, and the radio frequency front-end module completes the frequency band calibration with an error of ≤±1ppm; (3) The user interaction module starts, the touch screen displays the initialization interface, and the indicator light flashes. Step 2: Wi-Fi signal access and data parsing: (1) Automatic configuration mode: After the user presses and holds the one-key configuration button, the Wi-Fi signal receiving module scans the surrounding Wi-Fi networks, sorts them by signal strength, and selects the network with RSSI≥-85dBm (preferably selects the saved historical network); if a password is required, the user is prompted to enter it through the touch screen, and the configuration is saved after the connection is completed; (2) Manual configuration mode: Users can manually select a Wi-Fi network via the touch screen, enter the password, and establish a connection; (3) Data parsing: The Wi-Fi signal receiving module receives data frames, and after parsing by the baseband processing unit, it extracts IP layer data packets (including TCP / UDP protocol data), performs verification (CRC check), and then caches them in memory (cache capacity ≥ 128MB). Step 3: 4G / 5G signal generation and transmission: (1) Protocol stack encapsulation: The baseband processing unit encapsulates IP layer data packets into 4G / 5G protocol stack data according to the 3GPP standard: 4G mode: sequentially passes through PDCP layer (encryption, compression), RLC layer (segmentation / reassembly), MAC layer (scheduling, HARQ), and PHY layer (channel coding, modulation). 5G mode: Adds a new SDAP layer (QoS mapping) to support URLLC and eMBB service differentiation; (2) Frequency band selection: The intelligent frequency band selection unit is activated, and the target frequency band is determined by combining the preset operator frequency band priority and real-time monitoring data (e.g., China Mobile prioritizes the n41 frequency band). (3) Radio frequency transmission: The baseband signal is sent to the radio frequency front-end module after digital-to-analog conversion, and after up-conversion, filtering and power amplification (the power is adjusted according to the coverage requirements, the default is 18dBm), it is transmitted through the built-in antenna array; Step 4: Multi-carrier network registration and management: (1) Operator selection: Users can select the target operator (such as China Unicom) through the touch screen display, or select the operator they have used most recently by default; (2) Parameter loading: The multi-carrier support unit calls the corresponding carrier's PLMN, APN, and authentication parameters (IMSI, Ki) from the database. If it is eSIM mode, it downloads the configuration file through the cloud server via Wi-Fi and uses HTTPS encryption for transmission. (3) Network registration: The baseband processing unit completes network registration according to the 3GPP registration process (PLMN selection, cell search, random access, authentication and encryption). After successful registration, the operator information of the touch screen is updated. (4) Dynamic switching: When a user switches operators, the device automatically restarts the radio frequency link, reloads parameters and registers. The switching process takes ≤5 seconds. Step 5: Intelligent Optimization and Anomaly Handling (1) Real-time monitoring: Collect the following data at regular intervals (e.g., 2 seconds): Wi-Fi link: throughput, packet loss rate (if the packet loss rate is ≥5%, trigger Wi-Fi reconnection); 4G / 5G link: RSRP, SINR, number of terminal accesses (if the number of accesses is ≥15, the transmit power will be automatically increased to 23dBm); Device status: battery level, chip temperature (power reduced by 10% when temperature ≥ 65℃); (2) Exception handling: Wi-Fi Interruption: Activate offline caching (supports 10-minute data caching), rescan for Wi-Fi, and restore connection to resume data transmission; 4G / 5G registration failed: Automatically switch to the backup frequency band (e.g., if n41 fails, switch to n78). If it fails 3 times in a row, prompt the user to check the operator parameters. Low battery (≤10%): Automatically reduce power to 15dBm to extend battery life and prompt for charging.

[0026] Example 1 For home-based applications, see Figure 4 .

[0027] Scenario: In a residential environment with weak signal, but with a usable Wi-Fi network at home. Specifically, the macro base station signal is weak (unable to make phone calls), but the home Wi-Fi can access the internet normally.

[0028] Implementation steps: The user places a portable multi-carrier 4G / 5G signal generator based on Wi-Fi signal conversion in a location (where a Wi-Fi network can be connected normally) and presses and holds the power button to turn it on. After powering on the device, press and hold the device's one-key configuration button. The device will automatically scan for available Wi-Fi networks in the current environment; Select an available Wi-Fi network, enter the password, and the device will connect successfully. Next, you can choose a specific carrier to enable the network, for example, select China Mobile and select (B3). After waiting for a while, it showed that the China Mobile signal was successfully received.

[0029] In this embodiment, other operator frequency bands can also be selected for activation, enabling scenarios where there is no network at home, Wi-Fi can be converted into a mobile signal to make calls normally, eliminating the need to rely on macro base stations and reducing the cost for operators to deploy macro base stations.

[0030] Example 2 For applications in temporary office scenarios, see Figure 5 .

[0031] Scenario: Field construction camp (no macro base station signal), able to provide signal source by using a mobile phone that can receive satellite signals through a mobile hotspot (the mobile phone turns on a Wi-Fi hotspot, named "xxx").

[0032] Implementation steps: After powering on the device, press and hold the device's one-key configuration button. The device will automatically scan for available Wi-Fi networks in the current environment; Select an available Wi-Fi network, enter the password, and the device will connect successfully. Next, you can choose a specific carrier to enable the network, for example, select China Unicom (N78) or China Telecom (B1). After waiting for a while, it shows that China Unicom signal is successful and China Telecom signal is successful.

[0033] In this embodiment, the device supports multiple frequency bands, enabling it to operate on different frequency bands. This increases the device's compatibility and flexibility, adapting to different communication needs and environments. By supporting multiple frequency bands, the radio frequency can better enhance network coverage and capacity. Operating on different frequency bands avoids frequency interference, improves communication quality, and allows more users to access the network simultaneously. The method in Embodiment 2 can accommodate users from multiple different operators, greatly facilitating user operation.

[0034] Any parts or structures not specifically described in this invention can be made using existing technologies or products, and will not be elaborated upon here.

[0035] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A portable multi-carrier 4G / 5G signal generation device based on Wi-Fi signal conversion, characterized in that, include: The Wi-Fi signal receiving module is used to receive signals sent by routers or mobile terminals and forward signals generated by other terminals connected to the Wi-Fi signal receiving module to the corresponding target devices. The signal conversion and processing module is used to perform bidirectional conversion between Wi-Fi signals and 4G / 5G signals, user terminal interaction, and signal conversion with corresponding uplink Wi-Fi devices; RF front-end module; Power management module; User interaction module; The core control system is connected to the Wi-Fi signal receiving module, signal conversion and processing module, RF front-end module, power management module, and user interaction module.

2. A portable multi-carrier 4G / 5G signal generation device based on Wi-Fi signal conversion according to claim 1, characterized in that, The Wi-Fi signal receiving module uses a high-performance Wi-Fi chip, integrates a low-noise amplifier and a bandpass filter, is compatible with IEEE 802.11a / b / g / n / ac / ax protocols, supports simultaneous reception of 2.4GHz and 5GHz dual-band, has a maximum receiving sensitivity of ≤-96dBm, a maximum bandwidth of 160MHz, and supports MU-MIMO reception.

3. A portable multi-carrier 4G / 5G signal generation device based on Wi-Fi signal conversion according to claim 1, characterized in that, The signal conversion and processing module includes: The baseband processing unit uses a multi-core ARM Cortex-A73 processor and a dedicated communication baseband chip, integrating a Wi-Fi protocol stack and a 4G / 5G protocol stack to realize Wi-Fi data frame parsing, 4G / 5G protocol stack encapsulation, modulation and demodulation; Multi-carrier support unit, integrating two programmable SIM card slots and an eSIM chip, with a built-in carrier parameter database; The intelligent frequency band selection unit is used to select the optimal frequency band from a preset frequency band library.

4. A portable multi-carrier 4G / 5G signal generation device based on Wi-Fi signal conversion according to claim 1, characterized in that, The radio frequency front-end module includes: The integrated antenna array has four built-in antennas, including a 2.4GHz / 5GHz dual-band Wi-Fi antenna and a 4G / 5G broadband antenna. It supports dynamic beamforming based on user location to improve signal quality in edge areas. Signal processing components, including transmit and receive links.

5. A portable multi-carrier 4G / 5G signal generation device based on Wi-Fi signal conversion according to claim 1, characterized in that, The power management module includes: The power supply unit has a built-in 5000mAh lithium polymer battery and supports 5V / 2A input charging; The power consumption control unit is used to automatically adjust the processor voltage and frequency according to the load to achieve energy consumption management.

6. A portable multi-carrier 4G / 5G signal generation device based on Wi-Fi signal conversion according to claim 1, characterized in that, The user interaction module includes a touch screen and a smart app.

7. A portable multi-carrier 4G / 5G signal generation method based on Wi-Fi signal conversion, characterized in that, The generation is performed using a portable multi-carrier 4G / 5G signal generation device based on Wi-Fi signal conversion as described in any one of claims 1-6, comprising the following steps: Step 1: Initialization Phase (1) After the device is powered on, the power management module detects the battery level. If it is ≥20%, it enters the working mode; otherwise, it triggers a charging prompt. (2) The baseband processing unit loads the Linux operating system and protocol stack, and the radio frequency front-end module completes the frequency band calibration with an error of ≤±1ppm; (3) The user interaction module starts, the touch screen displays the initialization interface, and the indicator light flashes. Step 2: Wi-Fi signal access and data parsing: (1) Automatic configuration mode: After the user presses and holds the one-key configuration button, the Wi-Fi signal receiving module scans the surrounding Wi-Fi networks, sorts them by signal strength, and selects the network with RSSI≥-85dBm; if a password is required, the user is prompted to enter it through the touch screen, and the configuration is saved after the connection is completed; (2) Manual configuration mode: Users can manually select a Wi-Fi network via the touch screen, enter the password, and establish a connection; (3) Data parsing: The Wi-Fi signal receiving module receives data frames, and after parsing by the baseband processing unit, it extracts IP layer data packets, performs verification, and caches them in memory with a cache capacity of ≥128MB; Step 3: 4G / 5G signal generation and transmission: (1) Protocol stack encapsulation: The baseband processing unit encapsulates IP layer data packets into 4G / 5G protocol stack data according to the 3GPP standard: 4G mode: Passes through PDCP layer, RLC layer, MAC layer, and PHY layer in sequence; 5G mode: Adds SDAP layer to support URLLC and eMBB service differentiation; (2) Frequency band selection: The intelligent frequency band selection unit is activated, and the target frequency band is determined by combining the preset operator frequency band priority and real-time monitoring data; (3) Radio frequency transmission: The baseband signal is sent to the radio frequency front-end module after digital-to-analog conversion, and after up-conversion, filtering and power amplification, it is transmitted through the built-in antenna array; Step 4: Multi-carrier network registration and management: (1) Carrier selection: Users select the target carrier through the touch screen, or select the carrier they have used most recently by default; (2) Parameter loading: The multi-carrier support unit calls the corresponding carrier's PLMN, APN, and authentication parameters from the database. If it is eSIM mode, it downloads the configuration file through Wi-Fi connection to the cloud server and uses HTTPS encrypted transmission. (3) Network registration: The baseband processing unit completes network registration according to the 3GPP registration process, and updates the operator information of the touch screen after successful registration; (4) Dynamic switching: When a user switches operators, the device automatically restarts the radio frequency link, reloads parameters and registers. The switching process takes ≤5 seconds. Step 5: Intelligent Optimization and Anomaly Handling (1) Real-time monitoring: Collect the following data at regular intervals: Wi-Fi link: throughput, packet loss rate; 4G / 5G link: RSRP, SINR, number of terminal accesses; Device status: battery level, chip temperature; (2) Exception handling: Wi-Fi interruption: Activate offline caching, rescan for Wi-Fi networks, and restore connection to resume data transmission; 4G / 5G registration failed: Automatically switch to backup frequency band. If it fails 3 times in a row, prompt the user to check the operator parameters. Low battery: Automatically reduces power to 15dBm to extend battery life and prompts you to charge.

Images