Mobile terminal system switching control method based on dual hardware systems and mobile terminal

Abstract

The invention discloses a mobile terminal system switching control method based on hardware dual systems and a mobile terminal, and relates to the technical field of terminal application testing, and the method comprises the steps that dual systems and a controller are arranged on the mobile terminal in advance, the dual systems comprise an intelligent machine system and a function machine system, and the controller controls dual system switching and peripheral switching; when it is detected that the electric quantity of the mobile terminal is larger than a first preset value, the mobile terminal system is controlled to be switched into an intelligent operating system, all peripherals are controlled to be connected to the intelligent operating system in a default mode, and the function machine system is shut down; and when it is detected that the electric quantity of the mobile terminal is lower than a first preset value, a switching instruction is received or the electric quantity is lower than a second preset value, triggering and switching to the function machine system, controlling the peripherals to be connected to the function machine system in a default manner, and controlling the intelligent operating system to be shut down at the same time. The method has the advantages that the endurance time of the equipment is obviously prolonged and the reliability of a basic communication function is guaranteed through hardware-level system switching under the condition of low electric quantity.

Description

Technical Field

[0001] This invention relates to the field of mobile terminal system control technology, and in particular to a mobile terminal, a mobile terminal system switching control method based on a hardware dual system, and a terminal device. Background Technology

[0002] In outdoor applications, rugged smartphones are widely popular due to their multi-functional features. However, due to the high power consumption of their operating systems, battery life is significantly limited in environments without external power, especially in critical situations such as emergency rescues, making it difficult to maintain the reliability of basic communication services. To alleviate this problem, existing solutions, such as Android's Super Power Saving Mode, attempt to reduce power consumption through software-level processor frequency limiting and core disabling mechanisms. However, this method still relies on the same hardware platform running the complete operating system and cannot eliminate the underlying static power consumption in standby mode. Specifically, software-level optimization measures cannot effectively maintain the long-term operation of basic communication functions such as calls and text messages when the battery is severely low, because the operating system and its background processes continue to consume power. At the same time, the existing architecture lacks the ability to physically isolate hardware-level system switching capabilities, making it impossible to completely shut down the high-power intelligent system and activate the dedicated low-power communication system under low power conditions, resulting in extremely limited room for improvement in device battery life. In addition, traditional solutions pose a risk of communication interruption in extreme low-power scenarios, failing to meet the core reliability requirements of outdoor activities.

[0003] Therefore, existing technologies still need improvement and development. Summary of the Invention

[0004] To address the technical problems of strong hardware dependence, low efficiency, and insufficient reliability in existing technologies, this invention provides a mobile terminal, a mobile terminal system switching control method based on a hardware dual-system, and a terminal device. It has the advantages of significantly extending the device's battery life under low power conditions and ensuring the reliability of basic communication functions through hardware-level system switching.

[0005] The technical solution of this application is as follows: A mobile terminal system handover control method based on a hardware dual-system, comprising: A dual system and a controller are pre-configured on the mobile terminal. The dual system includes an independent smart machine system running a smart operating system and a feature machine system running a basic communication system. The controller is used to identify the status of the two systems and output different levels to control the switching of the dual systems and the switching of peripherals according to the switching command. When the mobile terminal's battery level is detected to be greater than a first predetermined value, the mobile terminal system is controlled to switch to the smart operating system, and all peripherals are controlled to connect to the smart operating system by default, and the feature phone system is turned off. When the mobile terminal's battery level is detected to be lower than a first predetermined value, a prompt will be made asking whether to switch to a feature phone system to extend battery life. When a command to switch to the feature phone system is received or the mobile terminal's battery level drops below a second predetermined value, the system is controlled to switch to the feature phone system running the basic communication system. At the same time, all peripherals are controlled to connect to the feature phone system by default, and the smart operating system is powered off.

[0006] The aforementioned mobile terminal system switching control method based on a hardware dual-system includes the following steps: when a command to switch to a feature phone system is received or the mobile terminal's battery level drops below a second predetermined value, the mobile terminal system is switched to a feature phone system running the basic communication system, and all peripherals are controlled to connect to the feature phone system by default. Simultaneously, the smart operating system is powered off. When the mobile terminal system is switched, before the smart operating system is shut down, a command is sent to the controller to control the general input / output port to turn on the feature phone system. At the same time, the controller sets the control port of the single-pole double-throw switch connected to the peripherals high, switching all peripherals' microphones, speakers, earpieces, SIM cards, power buttons, and volume buttons from the smart operating system to the feature phone system. During the shutdown process of the smart operating system, the key data of the mobile terminal's address book and call records are transmitted and synchronized to the feature phone system through the interface to ensure that they can still be accessed in feature phone mode. When the mobile terminal system switches to a feature phone system running a basic communication system, and simultaneously controls the smart operating system to shut down and controls all peripherals to connect to the feature phone system by default, then the system controls and allows the use of basic communication functions such as making calls and sending text messages.

[0007] The aforementioned mobile terminal system switching control method based on a hardware dual-system, wherein the step of triggering the switching of the mobile terminal system to the feature phone system running the basic communication system when receiving a command to switch to the feature phone system or when the mobile terminal battery level is lower than a second predetermined value, and controlling all peripherals to connect to the feature phone system by default, while simultaneously controlling the smart operating system to shut down, further includes: When the mobile terminal system is currently a feature phone system running the basic communication system, and it detects that a charging device has been plugged in, it controls the smart operating system to power on by default and sends a switching command to the controller to shut down the feature phone system and reconnect all peripherals to the smart operating system so that all functions of the smart operating system can continue to be used.

[0008] The mobile terminal system switching control method based on a dual hardware system includes integrating navigation and SOS emergency call functions into the feature phone system; the SOS emergency call function includes setting up one-click emergency call and issuing an emergency call function in combination with intelligent voice recognition and preset scenario modes.

[0009] The mobile terminal system switching control method based on hardware dual systems, wherein the dual system switching can be triggered by physical buttons, voice commands, or gestures; The switches for dual-system switching include multiplexers, analog switches, and / or single-pole double-throw switches.

[0010] The mobile terminal system switching control method based on a hardware dual-system further includes the step of pre-setting a dual system and a controller in the mobile terminal: In addition to the dual systems, a third system connected to the controller is also included, which is an integrated and independent security system used to switch to the security system when online banking transactions or access to sensitive internal company data are required; the security system has an independent operating environment and encryption mechanism.

[0011] A mobile terminal, comprising: A smart device system includes a first operating unit that runs a smart operating system; The feature phone system includes a second operating unit that runs the basic communication system; The controller is connected to the smart phone system and the feature phone system respectively. The controller is used to identify the status of the two systems and output different levels to control the switching of peripherals and the switching of the two systems according to the switching command. The smart phone system and the feature phone system are physically independent and are switched by a controller. When the battery level of the mobile terminal is detected to be greater than a first predetermined value, the mobile terminal system is switched to the smart operating system, and all peripherals are connected to the smart operating system by default, while the feature phone system is turned off. When the mobile terminal's battery level is detected to be lower than a first predetermined value, a prompt will be made asking whether to switch to a feature phone system to extend battery life. When a command to switch to the feature phone system is received or the mobile terminal's battery level drops below a second predetermined value, the system is controlled to switch to the feature phone system running the basic communication system. At the same time, all peripherals are controlled to connect to the feature phone system by default, and the smart operating system is powered off.

[0012] The mobile terminal, wherein the peripherals include: a microphone, a speaker, a handset, a SIM card, a power button, and volume buttons; The microphone, speaker, and earpiece are connected to the smart phone system and the feature phone system respectively via a first single-pole double-ended switch; The volume keys are connected to the smartphone system and the feature phone system respectively via a second single-pole double-switch. The power button is connected to the smart phone system and the feature phone system respectively via a third single-pole double-ended switch; The SIM card is connected to the smartphone system and the feature phone system respectively via a fourth single-pole double-switch.

[0013] The mobile terminal further includes a charging interface connected to the smartphone system, and the mobile terminal uses any one of the hardware dual-system mobile terminal system switching control methods to perform system switching control.

[0014] A terminal device includes a memory and one or more programs, wherein one or more programs are stored in the memory and configured to be executed by one or more processors, the one or more programs including steps for performing any of the methods described herein.

[0015] As can be seen from the above, the mobile terminal, the mobile terminal system switching control method based on a hardware dual-system, and the terminal device provided in this application include a physically independent smartphone system and a feature phone system. The controller automatically switches systems and controls peripheral connections based on battery status. When the battery is low, the high-power smartphone system is completely shut down and the low-power feature phone system is activated. This has the advantage of significantly extending the device's battery life under low-power conditions and ensuring the reliability of basic communication functions through hardware-level system switching. This invention adds an extremely low-power feature phone system to the smartphone, with both systems sharing peripherals such as MIC (microphone), SPK (speaker), REC (earpiece), SIM card, power button, and volume buttons. Compared with existing technologies, the advantages of this invention are: 1) fundamentally solving the power consumption problem in low-power scenarios; 2) adopting dual-system hardware independence, without interference; 3) sharing peripherals, without increasing device size and complexity; 4) supporting the synchronous migration of user data (such as contacts) during system switching, and providing convenience for users. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of a mobile terminal provided in an embodiment of the present invention.

[0018] Figure 2 This is a flowchart illustrating the mobile terminal system switching control method based on a hardware dual-system according to an embodiment of the present invention. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer and more explicit, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0020] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0021] In traditional mobile terminals, software-level power-saving modes only reduce power consumption by limiting frequency and cores, which cannot completely reduce system standby power consumption. Furthermore, the long-term maintenance of basic communication functions in extremely low power scenarios is difficult to guarantee, and the lack of hardware-level system switching mechanisms limits the improvement of battery life. In particular, the software dependency of the system architecture makes it impossible to effectively maintain the reliability of critical communication functions in low power states, thus affecting the basic service capabilities of mobile terminals in emergency scenarios.

[0022] For example, in outdoor mountain rescue missions, when the mobile terminal's battery level continuously drops to a critical level, the existing power-saving mode cannot achieve system-level power consumption optimization. This causes basic communication functions to be interrupted during emergency calls, hindering the transmission of rescue instructions, and preventing peripheral resources from being dynamically allocated to low-power communication paths. Furthermore, because the intelligent operating system and basic communication functions are not physically isolated, data synchronization and peripheral reconfiguration during system switching are delayed, extending communication recovery time and directly affecting the timeliness of rescue operations.

[0023] If these issues are not addressed, the continued operation of basic communication functions of mobile terminals under low power conditions cannot be guaranteed, the risk of emergency communication link interruption will be significantly increased, and the safety threats to users in outdoor environments will be further amplified. Consequently, inherent flaws in the system architecture will weaken critical communication capabilities during peak demand periods, failing to meet reliability requirements in emergency scenarios.

[0024] To address the aforementioned technical problems, embodiments of the present invention provide a mobile terminal and a mobile terminal system switching control method based on a hardware dual-system, as described in the following embodiments.

[0025] Example 1 like Figure 1 As shown, a mobile terminal in this embodiment includes: Smart machine system 101 includes a first operating unit that runs a smart operating system; The feature phone system 102 includes a second operating unit that runs the basic communication system; The controller 103 is connected to the smart device system 101 and the feature phone system 102 respectively. The controller 103 is used to identify the status of the two systems and output different levels according to the switching command to control the switching of peripherals and control the switching of the two systems. The smart phone system 101 and the feature phone system 102 are physically independent and are switched by a switch controlled by a controller 103. When the battery level of the mobile terminal is detected to be greater than a first predetermined value, the mobile terminal system is controlled to switch to the smart operating system, and all peripherals are controlled to connect to the smart operating system by default, and the feature phone system 102 is turned off. When the mobile terminal's battery level is detected to be lower than the first predetermined value, a prompt will be made asking whether to switch to the feature phone system 102 to extend battery life; When a command to switch to the feature phone system 102 is received or the mobile terminal battery level is lower than a second predetermined value, the control system of the mobile terminal is switched to the feature phone system 102 running the basic communication system, and all peripherals are controlled to connect to the feature phone system 102 by default. At the same time, the smart operating system is turned off.

[0026] For ease of understanding, the following explains some key terms in this embodiment: In this embodiment, the smart device system 101 refers to the hardware and software suite in a mobile terminal used to run a smart operating system and provide rich application functions and multimedia experiences. This system has high processing power and low power consumption.

[0027] In this embodiment, the feature phone system 102 refers to the hardware and software set in a mobile terminal used to run a basic communication system and provide basic communication functions such as calls and text messages. This system typically has low power consumption to extend battery life.

[0028] The first operating unit in this embodiment is the core processing unit in the smart machine system 101, which is responsible for executing the smart operating system and its upper-layer applications.

[0029] The second operating unit in this embodiment is the core processing unit in the feature phone system 102, which is responsible for executing the basic communication system and managing basic communication functions.

[0030] The intelligent operating system in this embodiment refers to an operating system with functions such as multitasking, graphical user interface, and application installation, such as Android or iOS.

[0031] The basic communication system in this embodiment refers to an operating system that provides basic communication functions such as calls and text messages, and typically has low resource consumption and power consumption.

[0032] In this embodiment, the controller 103 is a hardware module that connects the smartphone system 101 and the feature phone system 102, and is responsible for managing system switching and peripheral device connections. The controller 103 can identify the operating states of the two systems and, based on received switching commands, outputs different level signals to control the connection status of peripheral devices and the switching between the two systems.

[0033] In this embodiment, peripherals refer to external devices connected to the system in the mobile terminal, such as microphones, speakers, earpieces, SIM cards, buttons, etc. These devices need to be correctly connected and used in different system modes.

[0034] The switching instruction refers to the command that triggers the mobile terminal system to switch. This instruction can originate from user operation, system battery status, or other preset conditions.

[0035] In this embodiment, level control refers to the controller 103 controlling the working state of other hardware components (such as switches) by outputting high-level or low-level signals, thereby realizing the connection switching of peripherals or the power management of the system.

[0036] In this embodiment, dual-system switching refers to the process by which the mobile terminal switches between the smartphone system 101 and the feature phone system 102 to adapt to different usage scenarios and power requirements.

[0037] The physical independence in this embodiment means that the smartphone system 101 and the feature phone system 102 are independent of each other at the hardware level, each having its own core components such as processor and memory, rather than just a mode switch at the software level.

[0038] In this embodiment, the switch refers to an electronic component used to control the on / off state of a circuit or the switching of signal paths. In this embodiment, it is used to realize the connection switching of peripheral devices between the smart device system 101 and the feature phone system 102.

[0039] In this embodiment, the first and second predetermined values ​​are preset battery thresholds. When the mobile terminal's battery level reaches or falls below these thresholds, a corresponding system switch or prompt operation will be triggered to optimize battery life management.

[0040] like Figure 1 As shown, this embodiment provides a mobile terminal that, through a dual-system design at the hardware level, aims to address the shortcomings of existing smartphones in terms of battery life and emergency communication.

[0041] The mobile terminal includes a smartphone system 101, which contains a first running unit for running a smart operating system, such as Android, HarmonyOS, or macOS. In this embodiment, the smartphone system 101 can be configured with a high-performance processor, large-capacity memory, and a high-resolution display to support complex applications and multimedia functions. The first running unit can be a multi-core processor capable of efficiently executing a smart operating system, such as a Linux kernel-based operating system, and providing a rich user experience.

[0042] The mobile terminal also includes a feature phone system 102, which contains a second operating unit for running the basic communication system. The feature phone system 102 can be configured to use a low-power microcontroller 103 or a single-chip microcomputer to implement basic call and SMS functions. The second operating unit can be a low-power ARM Cortex-M series processor, which can maintain the operation of the basic communication system with extremely low power consumption, thereby significantly extending standby time.

[0043] To enable collaborative operation and switching between the two systems, the mobile terminal is equipped with a controller 103. This controller 103 is connected to both the smartphone system 101 and the feature phone system 102. The controller 103 can be an independent microcontroller unit (MCU) integrating a status recognition module and a level output module. The controller 103 continuously monitors the operating status of both systems, for example, by receiving status signals from each system. When a switching command is received, the controller 103 outputs different level signals according to the command content to control the connection status of peripherals and the power management and signal routing between the two systems, thereby achieving dual-system switching. For example, the controller 103 can control the power management chip to turn a system on or off, and control an analog switch to switch the connection of peripherals.

[0044] The smartphone system 101 and the feature phone system 102 are physically independent of each other. This means they have their own independent power management circuits, processors, and memory, rather than sharing most of the core hardware. Switching between systems is achieved through a switch controlled by the controller 103. For example, the controller 103 can control a set of relays or electronic switches, such as a single-pole double-sided switch, to switch shared peripherals (such as antennas, speakers, microphones, etc.) from one system to another, while simultaneously managing the power supply of both systems to ensure that only one system is in a dominant operating state during the switching process, or to perform a smooth transition as needed.

[0045] In terms of power management, when the mobile terminal detects that its battery level exceeds a first predetermined value, the system automatically switches the mobile terminal to the smart operating system. At this time, the controller 103 ensures that the smart phone system 101 is operational and controls all peripherals to connect to the smart operating system by default. Simultaneously, the feature phone system 102 is shut down to save power and avoid resource conflicts. For example, when the battery level is above 20%, the system will prioritize using the smart operating system to provide a complete smartphone experience.

[0046] When the system detects that the mobile terminal's battery level is below a first predetermined value, it will prompt the user, asking if they need to switch to feature phone mode 102 to extend battery life. This prompt can be made through screen display, vibration, or sound. For example, when the battery level drops to 20%, the system will pop up a dialog box suggesting that the user switch to feature phone mode to conserve power for emergency communications.

[0047] Furthermore, upon receiving a user's command to switch to the feature phone system 102, or when the mobile terminal's battery level drops below a second predetermined value, the system will trigger the control to switch the mobile terminal to the feature phone system 102 running the basic communication system. During this process, the controller 103 ensures that the feature phone system 102 starts up and takes over control, while controlling all peripherals to connect to the feature phone system 102 by default. The smart operating system will be shut down to minimize power consumption. For example, if the user chooses to switch to feature phone mode, or the battery level drops to 5%, the system will force a switch to feature phone mode to ensure that the most basic call functions can be maintained for an extended period.

[0048] The following example will provide a more detailed explanation of the above technical solution: Suppose user A is carrying this mobile terminal for an outdoor activity. At the beginning of the activity, the mobile terminal has a sufficient battery, for example, 90%. At this time, the controller 103 of the mobile terminal detects that the battery level is greater than a preset first predetermined value (e.g., 20%). According to preset logic, the controller 103 controls the mobile terminal system to run the smart operating system. At this time, the first operating unit in the smartphone system 101 is efficiently processing various applications, such as navigation, photography, and social media applications. Simultaneously, the controller 103 ensures that peripherals such as the microphone, speaker, and SIM card are connected to the smartphone system 101 by default, while the feature phone system 102 is turned off to provide a complete smartphone experience.

[0049] As outdoor activities continue, user A uses navigation and photography functions for an extended period, causing the mobile device's battery to gradually deplete. When the battery level drops below a first predetermined value (e.g., 20%), controller 103 detects this. At this point, a prompt message appears on the mobile device's screen, asking user A whether they want to switch to feature phone system 102 to extend battery life. User A can choose to continue using smartphone system 101 or switch to feature phone system 102.

[0050] If user A chooses to continue using smartphone system 101, but the battery level continues to drop, controller 103 will automatically trigger a system switch when the battery level drops further below a second predetermined value (e.g., 5%). At this time, controller 103 first sends a shutdown command to smartphone system 101 and activates the second operating unit in feature phone system 102. During the shutdown process of smartphone system 101, controller 103 controls a switch to switch the connection of peripherals such as microphone, speaker, and SIM card from smartphone system 101 to feature phone system 102. Once the switch is complete, feature phone system 102 begins operating the basic communication system, providing call and SMS functions, while smartphone system 101 is completely shut down. Through this hardware-level switch, the power consumption of the mobile terminal is significantly reduced, allowing it to maintain basic communication functions for a long time even in extremely low battery conditions, ensuring that user A can call for help or make contact in an emergency.

[0051] For example, user A gets lost outdoors and has only 3% battery remaining. At this time, because the battery level is below a second predetermined value, the mobile terminal automatically switches to the feature phone system 102. User A can use the feature phone system 102 to make emergency calls. Even if the smartphone system 101 cannot be started, basic communication functions can still be maintained for several hours or even longer, thus buying valuable time for rescue. This example fully demonstrates the overall technical solution of physically independent smartphone system 101 and feature phone system 102, and how the controller 103 switches between the two systems and peripherals based on battery status and switching commands. It effectively solves the technical problems of short battery life and insufficient emergency communication capabilities of smartphones in outdoor scenarios.

[0052] Based on the above examples, the mobile terminal provided in this embodiment demonstrates a significant technical contribution in solving the problems of the prior art. Existing smartphones, even with software-level super power-saving modes, only reduce power consumption through methods such as frequency and core limiting, failing to fundamentally solve the problem of high standby power consumption, resulting in the inability to maintain basic communication functions for extended periods in extremely low power scenarios.

[0053] In contrast, this embodiment introduces physically independent smartphone system 101 and feature phone system 102, with controller 103 handling hardware-level switching between the two systems and peripheral connection management, achieving true low-power operation. When the battery level falls below a predetermined threshold, the system can completely shut down the high-power smartphone system 101 and switch to the feature phone system 102, which only runs the basic communication system. This hardware-level system switching, compared to software-level power-saving modes in existing technologies, can significantly reduce power consumption, thereby significantly extending the battery life of the mobile terminal in low-power conditions.

[0054] For example, in the outdoor activity scenario described above for User A, when the battery is extremely low, existing smartphones may quickly shut down completely, preventing User A from making emergency communications. However, the mobile terminal in this embodiment, by switching to the feature phone system 102, ensures that basic communication functions can still be used for a long time even with low battery, providing reliable emergency communication for User A. This design not only solves the problems of high power consumption and short battery life in smartphones, but more importantly, it guarantees the user's basic communication needs and emergency rescue capabilities in extreme situations, improving the practicality and safety of the mobile terminal. Therefore, the technical solution of this embodiment provides a more effective and reliable mobile terminal power management and emergency communication solution.

[0055] In some embodiments described above in this application, a mobile terminal with a smartphone system 101 and a feature phone system 102 is proposed, and the dual-system switching is realized through a controller 103. However, in practical applications, how to effectively manage and switch various peripherals of the mobile terminal to ensure that peripherals can be correctly connected and work normally in different system modes is a key challenge to achieve seamless switching and improve user experience.

[0056] In this regard, such as Figure 1 As shown, this application further proposes that the peripherals of the aforementioned mobile terminal include: a microphone (MIC), a speaker (SPK), an earpiece (REC), a SIM card 108, a power button 107, and volume buttons 105; wherein, the MIC (microphone), SPK (speaker), and REC (earpiece) 104 are respectively connected to the smartphone system 101 and the feature phone system 102 via a first single-pole double-throw switch 109; the volume buttons 105 are respectively connected to the smartphone system 101 and the feature phone system 102 via a second single-pole double-throw switch 110; the power button 107 is respectively connected to the smartphone system 101 and the feature phone system 102 via a third single-pole double-throw switch 111; and the SIM card 108 is respectively connected to the smartphone system 101 and the feature phone system 102 via a fourth single-pole double-throw switch 112.

[0057] Specifically, the microphone, speaker, earpiece, SIM card 108, power button 107, and volume buttons 105 are essential hardware components for basic communication and human-computer interaction in a mobile terminal. The microphone is used to pick up voice input, the speaker and earpiece are used to output audio, the SIM card 108 is used for cellular network communication, the power button 107 is used for power control, and the volume buttons 105 are used to adjust the volume. They are the core interfaces for user interaction with the mobile terminal. A single-pole double-throw switch is an electronic switch with one input terminal (pole) and two output terminals (throw). It can connect the input terminal to either of the two output terminals to switch signals or power. In a mobile terminal, this switch can be used to switch the physical connection of a shared peripheral between two independent systems (smartphone system 101 and feature phone system 102). Its implementation can include mechanical switches, relays, analog switches, or multiplexers. For example, a CMOS analog switch can be used to select the connection path by controlling a voltage signal; or a miniature relay can be used to switch contacts by opening and closing an electromagnetic coil. The first single-pole double-throw switch 109, the second single-pole double-throw switch 110, the third single-pole double-throw switch 111, and the fourth single-pole double-throw switch 112 are dedicated electronic components used to switch the physical connection of specific peripherals (such as microphone, speaker, earpiece, volume button 105, power button 107, SIM card 108) between the smartphone system 101 and the feature phone system 102. They ensure that during system switching, the corresponding peripherals can be correctly routed to the currently active system, avoiding resource conflicts and functional failures. These switches can be composed of independent physical devices or integrated into more complex integrated circuits; for example, a multi-channel analog switch chip can contain the functions of multiple single-pole double-throw switches.

[0058] This application's solution configures key peripherals such as a microphone, speaker, earpiece, SIM card 108, power button 107, and volume buttons 105 for the mobile terminal, and utilizes multiple single-pole double-throw (SPL) switches to switch the physical connections between these peripherals and the smartphone system 101 and the feature phone system 102. When the controller 103 decides to switch systems based on preset conditions (such as a battery threshold or a user switching command), it sends control signals to these SPL switches. For example, when switching from the smartphone system 101 to the feature phone system 102, the controller 103 controls all relevant SPL switches to switch the connections of the microphone, speaker, earpiece, SIM card 108, power button 107, and volume buttons 105 from the smartphone system 101 to the feature phone system 102. This physical-level switching ensures that the currently active system can exclusively and correctly use these peripherals, thereby avoiding conflicts or functional abnormalities caused by two systems simultaneously attempting to access the same peripheral. In this way, even though the smartphone system 101 and the feature phone system 102 are physically independent, users can still immediately use basic communication functions such as telephone and SMS after switching systems, without having to manually plug or unplug peripherals or reconfigure them, which greatly improves the user experience and system reliability.

[0059] In one specific implementation, when the mobile terminal is running in smartphone system 101 mode, peripherals such as the microphone, speaker, earpiece, SIM card 108, power button 107, and volume buttons 105 are all connected to smartphone system 101 via their respective single-pole double-throw (SPL) switches. For example, the first SPL switch 109 directs the signal paths of the microphone, speaker, and earpiece to the main processor and audio codec of smartphone system 101. When the mobile terminal's battery level drops below a second predetermined value, and the controller 103 triggers a system switch to feature phone system 102, the controller 103 sends control signals to the first SPL switch 109, the second SPL switch 110, the third SPL switch 111, and the fourth SPL switch 112. For example, these control signals can be high-level or low-level digital signals used to control the state of transistors or relays inside the switches. Upon receiving the control signals, the first SPL switch 109 disconnects the microphone, speaker, and earpiece from smartphone system 101 and reconnects them to the corresponding interfaces of feature phone system 102. Similarly, the second single-pole double-throw switch 110 routes the input signal from the volume button 105 to the feature phone system 102, the third single-pole double-throw switch 111 ensures that the signal from the power button 107 is processed by the feature phone system 102, and the fourth single-pole double-throw switch 112 switches the communication interface of the SIM card 108 to the baseband module of the feature phone system 102. In this way, the feature phone system 102 can immediately recognize and use these peripherals after startup, thereby realizing basic communication functions such as making calls and sending text messages.

[0060] By configuring independent single-pole double-throw switches for key peripherals such as the microphone, speaker, earpiece, SIM card 108, power button 107, and volume buttons 105, and managing them uniformly through the controller 103, this application enables physical-level switching of peripherals between the smartphone system 101 and the feature phone system 102. This ensures that all necessary peripherals can be correctly identified and used by the currently active system during system switching, avoiding functional impairments caused by peripheral connection confusion or conflicts. After system switching, users can immediately use the various functions of the mobile terminal without any manual operation, thus significantly improving the smoothness, reliability, and user experience of system switching. This design effectively solves the complexity of peripheral resource allocation and switching in a dual-system environment, enabling physically independent dual systems to share a set of peripheral resources while maintaining the independent operation and functional integrity of each system.

[0061] In some of the embodiments described above in this application, although the mobile terminal can switch between the smartphone system 101 and the feature phone system 102 according to the battery level or user instructions to extend battery life or provide basic communication functions, how to efficiently and conveniently charge the smartphone system 101 and restore its smart functions after it is powered off due to depleted battery, and how to seamlessly integrate the charging process with the dual-system switching mechanism, is a challenge that affects user experience and system usability.

[0062] In this regard, this application further proposes that the mobile terminal also includes a charging interface 106, which is connected to the smartphone system 101, and the mobile terminal uses the above-mentioned mobile terminal system switching control method based on hardware dual system to perform system switching control.

[0063] The charging interface 106 is a physical connection port used to charge the internal battery of the mobile terminal. Its function is to receive electrical energy from an external power source and transmit it to the power management module of the mobile terminal to charge the battery. This interface can adopt various standards, such as a Micro-USB interface, widely used in various portable electronic devices; a USB Type-C interface, characterized by reversible insertion, high transmission rate, and support for higher charging power; or a proprietary magnetic charging interface 106, providing a more convenient connection method. The connection of the charging interface 106 to the smartphone system 101 means that the power input path of the charging interface 106 is directly or indirectly connected to the power management unit of the smartphone system 101. This connection ensures that when an external power source is connected through the charging interface 106, electrical energy can be preferentially or exclusively supplied to the smartphone system 101 for charging. In terms of implementation, the power pins of the charging interface 106 can be directly connected to the input of the power management chip (PMIC) of the smartphone system 101 through hardware circuit design; or, a power distribution module can be used to direct the charging current to the power path of the smartphone system 101 when a charging signal is detected. The mobile terminal employs a hardware-based dual-system mobile terminal system switching control method for system switching control. This means that the hardware and software design of the mobile terminal is configured to strictly follow a preset, hardware-based control process to manage the switching between the two systems. This method defines how the system judges, triggers switching, manages peripheral connections, and performs a series of operations such as data synchronization when different battery states are reached, user commands are received, or specific events (such as charging) are detected. For example, this method may include identifying the system state through the controller 103 and outputting different level signals according to preset logic to control physical switches (such as single-pole double-throw switches) to achieve peripheral routing switching; or, this method may involve transmitting key data through a specific interface during system switching to ensure the continuity of user information. This approach ensures the reliability, stability, and consistency of user experience during dual-system switching.

[0064] In the aforementioned mobile terminal, by introducing a charging interface 106 and connecting it to the smartphone system 101, the power management aspect of the entire dual-system switching control scheme is improved. When the mobile terminal needs charging, an external power source is connected through the charging interface 106, and the power is directly directed to the smartphone system 101 for charging. This design ensures that the smartphone system 101 can receive priority charging support after its power is depleted, thereby quickly restoring its operational capabilities. Simultaneously, this mobile terminal employs a hardware-based dual-system switching control method, meaning that the connection of the charging interface 106 not only provides power to the smartphone system 101 but may also serve as one of the conditions for triggering system switching. For example, when the mobile terminal is in the state of a feature phone system 102 running the basic communication system and its power is low, once the charging interface 106 is detected and charging begins, the system switching control method can be triggered, controlling the smart operating system to power on by default and sending a switching command to the controller 103, thereby shutting down the feature phone system 102 and reconnecting all peripherals back to the smart operating system, allowing the user to continue using all the functions of the smart operating system. This integrated design tightly integrates the charging process with the system switching process, forming an efficient and intelligent power management and system switching mechanism. This approach not only solves the charging problem of the smartphone system 101 when it is low on battery or powered off, but also further optimizes the convenience and smoothness of switching between different system modes, avoiding operation interruptions or complex manual switching caused by charging.

[0065] In one specific implementation, the mobile terminal can be configured with a USB Type-C charging port 106, which is directly connected to the main power input path of the smartphone system 101 through an internal power management unit. When the user inserts a USB Type-C charging cable into the charging port 106, the power management unit detects the charging voltage and prioritizes the allocation of charging current to the smartphone system 101. For example, when the smartphone system 101 of the mobile terminal shuts down due to depleted power, and only the feature phone system 102 is running to maintain basic communication, the controller 103 of the mobile terminal will immediately detect the charging status once the user inserts a charging device. At this time, the controller 103 will automatically trigger the startup process of the smartphone system 101 according to a preset system switching control method. During the startup process of the smartphone system 101, the controller 103 will send a shutdown command to the feature phone system 102 and simultaneously control the single-pole double-throw switch connected to the peripherals to switch all peripherals, such as the microphone, speaker, earpiece, SIM card 108, power button 107, and volume buttons 105, from the feature phone system 102 back to the smartphone system 101. Once the smartphone system 101 has fully booted up, users can continue to use all the functions of the smartphone system 101 without having to manually perform a complicated system switching operation.

[0066] Through the above technical solutions, the mobile terminal achieves significant improvements in dual-system switching and power management. Connecting the charging port 106 to the smartphone system 101, combined with a hardware-based dual-system switching control method, solves the problem of how to efficiently and conveniently charge and restore the smartphone system 101's functionality when its battery is depleted or it is powered off. When the mobile terminal is in feature phone system 102 operation mode and its battery is low, once a charging device is plugged in, the system can automatically recognize and trigger the smartphone system 101 to power on and switch peripherals, thus avoiding the tedious manual intervention of the user and improving the smoothness of the user experience. This design ensures that the smartphone system 101 can quickly recover from a low battery state and seamlessly take over all the functions of the mobile terminal, greatly improving the usability and convenience of the mobile terminal, especially in situations requiring emergency charging or rapid restoration of smart functions.

[0067] like Figure 2 As shown in the figure, a mobile terminal system switching control method based on a hardware dual-system according to an embodiment of the present invention includes the following steps: Step S100: Set up a dual system and a controller in advance on the mobile terminal. The dual system includes a smart machine system running an intelligent operating system and a function machine system running a basic communication system. The controller is used to identify the status of the two systems and output different levels to control the switching of the dual system and the switching of peripherals according to the switching command. Step S200: When the mobile terminal battery level is detected to be greater than the first predetermined value, the mobile terminal system is controlled to switch to the smart operating system, and all peripherals are controlled to connect to the smart operating system by default, and the feature phone system is turned off. Step S300: When the mobile terminal's battery level is detected to be lower than a first predetermined value, prompt whether to switch to the feature phone system to extend battery life; Step S400: When a command to switch to the feature phone system is received or the mobile terminal battery level is lower than a second predetermined value, the control of the mobile terminal system to switch to the feature phone system running the basic communication system is triggered, and all peripherals are controlled to connect to the feature phone system by default. At the same time, the smart operating system is controlled to shut down.

[0068] The core innovation of this embodiment lies in combining the physically independent smartphone system and feature phone system through hardware-level switching. A controller manages peripheral connections based on battery status and switching commands, thereby completely shutting down the high-power smartphone system and switching to the low-power feature phone system in extremely low-power scenarios. Compared to existing power-saving modes that rely solely on software frequency and core limiting, this solution achieves hardware-level system switching, fundamentally reducing system standby power consumption and ensuring basic communication functions can be maintained for extended periods even with low battery. Specifically, because the smartphone and feature phone systems are physically independent, the controller can precisely control the connection path of peripherals through voltage levels. For example, when the battery level falls below a second predetermined value, peripherals such as the microphone, speaker, earpiece, SIM card, power button, and volume buttons are automatically switched to the feature phone system while the smartphone system is completely shut down. This avoids the system standby power consumption problem that software-level power-saving modes cannot eliminate.

[0069] Through the above technical solutions, the battery life of mobile terminals in outdoor scenarios is significantly improved, especially in emergency rescue situations, enabling reliable provision of basic communication services. For example, when a user is in an outdoor environment with extremely low battery, the mobile terminal automatically switches to a feature phone system, and basic communication functions can be maintained for several hours or more. In contrast, existing smartphones, even when using super power-saving mode, quickly shut down because they cannot completely reduce hardware power consumption. Overall, this solution, through the synergy of a hardware-level dual-system architecture and intelligent power management strategies, effectively solves the technical problem of smartphones' short battery life and inability to maintain basic communication functions in extremely low battery situations outdoors, providing users with a more secure and reliable communication guarantee mechanism.

[0070] In some embodiments described above, when the mobile terminal's battery level drops below a second predetermined value or a switching command is received, the mobile terminal system is switched to a feature phone system running the basic communication system, and all peripherals are controlled to connect to the feature phone system by default, while the smart operating system is powered off. However, ensuring seamless migration of critical user data and smooth switching of peripherals during the switching process between the smart operating system's shutdown and the feature phone system's power-on, to avoid communication interruption or data loss, is a problem that requires further resolution.

[0071] In response, this application further proposes a mechanism that, upon receiving a command to switch to a feature phone system or when the mobile terminal's battery level falls below a second predetermined value, triggers a switch of the mobile terminal system to a feature phone system running a basic communication system. This mechanism also controls all peripherals to connect to the feature phone system by default, while simultaneously controlling the shutdown of the smart operating system. The steps include: before the smart operating system shuts down, the controller sends a command to the controller to power on the feature phone system via the general purpose input / output port; simultaneously, the controller sets the control port of the single-pole double-throw switch connected to the peripherals high, switching all peripherals' microphones, speakers, handsets, SIM cards, power buttons, and volume buttons from the smart operating system to the feature phone system; during the shutdown process of the smart operating system, key data from the mobile terminal's address book and call logs are transmitted and synchronized to the feature phone system via an interface, ensuring continued access in feature phone mode; when the mobile terminal system switches to a feature phone system running a basic communication system, and the smart operating system shuts down while all peripherals are connected to the feature phone system by default, the system allows the use of basic communication functions such as making calls and sending text messages.

[0072] Specifically, when the mobile terminal system is switched, the smart operating system sends a specific command to the controller before completely shutting down. Upon receiving the command, the controller immediately initiates the feature phone system's startup via its general-purpose input / output (GPIO) port. The GPIO port can be a programmable digital pin that, by changing its level (e.g., from low to high), triggers the feature phone system's power management unit or startup circuit, thus enabling pre-power-on of the feature phone system. Alternatively, the feature phone system can be started via a dedicated wake-up signal line or through the power management chip's control interface.

[0073] Simultaneously, the controller will raise the control port of the single-pole double-throw switch (SPPS) connected to the peripheral device. A SPPS is an electronic switch that allows one input terminal to be connected to one of two output terminals. By raising the control port, the controller can switch the connection of all peripheral devices, such as microphones, speakers, handsets, SIM cards, power buttons, and volume buttons, from the smart operating system to the feature phone system. Besides SPPS, multiplexers or analog switch arrays can also be used to switch peripheral devices. These devices can route multiple input signals to different output terminals based on the control signal, ensuring that peripheral devices are correctly connected to the currently running system.

[0074] During the shutdown process of the smart operating system, critical data such as the mobile terminal's address book and call logs are transmitted and synchronized to the feature phone system. Data transmission can be achieved through various interfaces. For example, serial communication interfaces such as SPI (Serial Peripheral Interface), I2C (Integrated Circuit Bus), or UART (Universal Asynchronous Receiver / Transmitter) can be used to read data from the smart operating system's memory and write it to the feature phone system's memory. Alternatively, if the two systems share a portion of storage space, data synchronization can be achieved by sharing a memory region. The purpose of synchronization is to ensure that users can still access this critical communication data in feature phone mode, thereby maintaining a continuous user experience.

[0075] When the mobile terminal system switches to a feature phone system running basic communication, and the smart operating system is powered off, and all peripherals are controlled to connect to the feature phone system by default, the system will only allow basic communication functions such as making calls and sending text messages. This means that in feature phone mode, applications and services related to the smart operating system will be disabled, thereby minimizing power consumption and extending the mobile terminal's battery life.

[0076] The solution proposed in this application, upon receiving a command to switch to a feature phone system or when the mobile terminal's battery level falls below a second predetermined value, aims to achieve a smooth transition from the smart operating system to the feature phone system and ensure the continuity of critical communication functions. First, before the smart operating system completely shuts down, the controller receives a command and immediately starts the feature phone system via a general-purpose input / output port. This pre-start mechanism avoids a gap during the system switchover process. Simultaneously, the controller synchronously raises the control port of the single-pole double-throw switch connecting peripherals, thereby quickly switching all critical peripherals, such as the microphone, speaker, earpiece, SIM card, power button, and volume buttons, from the smart operating system to the feature phone system. This parallel operation ensures that the feature phone system can immediately gain control of necessary hardware resources after startup. Furthermore, during the smart operating system shutdown process, the mobile terminal transmits and synchronizes critical data such as contacts and call logs to the feature phone system via a preset interface, ensuring seamless access to this important information for the user even in feature phone mode. Finally, when the feature phone system completely takes over and the smart operating system shuts down, the mobile terminal will only be allowed to use basic communication functions such as making calls and sending text messages, thus extending battery life. Through this refined switching process, this application effectively solves the problems of data loss and function interruption that may occur during system switching, ensuring the continuity of user experience.

[0077] In one specific implementation, when the mobile terminal's battery level drops to, for example, 10% (below a second predetermined value), the controller triggers a system switching process. At this time, before shutting down, the smart operating system sends a specific command signal to the controller. Upon receiving this command, the controller immediately sends a startup signal to the power management unit of the feature phone system via its general-purpose input / output port (e.g., a GPIO pin is set to high), causing the feature phone system to start up. Almost simultaneously, the controller drives a series of single-pole double-throw switches (e.g., using a CMOS analog switch array) to switch the signal paths of peripherals such as the microphone, speaker, earpiece, SIM card slot, power button, and volume buttons from the smart phone system to the feature phone system. For example, the SIM card's data and power lines are switched from the smart phone system's baseband processor to the feature phone system's baseband processor. During the smart operating system's shutdown operation, its internally stored contact database and call log files are packaged and transmitted to the feature phone system's memory via a high-speed serial interface (e.g., SPI or UART interface), where they are parsed and loaded by the feature phone system to ensure that the user can immediately access and use this data in feature phone mode. Once the smart operating system is completely shut down, the feature phone system becomes the dominant system. At this time, users can only perform basic communication operations such as making phone calls and sending text messages, while the applications and services related to the smart operating system are turned off, thus significantly reducing power consumption.

[0078] Through the aforementioned technical solution, this application achieves pre-startup of the feature phone system and synchronous switching of peripherals during the switching process from a smart operating system to a feature phone system in a mobile terminal, effectively avoiding communication interruptions and disruptions to the user experience during system switching. Simultaneously, by transmitting and synchronizing critical data such as contacts and call logs during the shutdown process of the smart operating system, it ensures that users can seamlessly access important information in feature phone mode, greatly improving communication continuity and data availability in low-battery or emergency situations. This refined switching control mechanism not only optimizes the smoothness of system switching but also ensures the integrity of users' critical data, thereby extending battery life while maintaining a good user experience.

[0079] In some of the embodiments described above in this application, a solution is proposed to switch to a feature phone system to extend battery life when the mobile terminal's battery is low. However, when the mobile terminal regains power and begins charging, the user may need to manually switch back to a more powerful smart operating system, which to some extent reduces the convenience of the user experience.

[0080] In response, this application further proposes that when the mobile terminal system is currently a feature phone system running a basic communication system, and a charging device is detected being plugged in, the smart operating system is controlled to power on by default, and a switching command is sent to the controller to control the shutdown of the feature phone system and reconnect all peripherals back to the smart operating system so that all functions of the smart operating system can continue to be used.

[0081] Among them, "when the current state of the mobile terminal system is a feature phone system running a basic communication system" means that the mobile terminal is in a low-power operation mode that mainly uses basic communication functions.

[0082] "Detection of plugged-in charging device" means that the mobile terminal can sense the connection of an external power source (such as a charger). This detection can be achieved by the power management chip (PMIC) monitoring the voltage and current changes of the charging interface, or by software polling relevant hardware status registers to obtain charging status information.

[0083] "Controlling the default startup of the smart operating system" means that the system will automatically start the smart operating system after charging is detected, without manual intervention from the user. This can be triggered by the controller sending a startup signal to the power management unit of the smart device system, or by a dedicated hardware logic circuit.

[0084] "Send a switching command to the controller" means that the module responsible for charging detection (such as a feature phone system or a separate charging management module) sends a signal to the central controller to initiate the system switching process. This command can be a digital signal, a specific data packet transmitted via an internal bus (such as I2C or SPI), or a level change on a control line.

[0085] "Controlling the shutdown of the feature phone system" refers to the orderly shutdown of the feature phone system at the same time as the smart operating system starts up, in order to avoid system conflicts and optimize resource utilization. This can be achieved by the controller sending a shutdown command to the feature phone system's power management module, or by directly cutting off its power after ensuring that critical data has been saved.

[0086] "Reconnecting all peripherals back to the smart operating system" refers to switching shared peripherals of a mobile terminal (such as microphone, speaker, earpiece, SIM card, power button, and volume buttons) from the feature phone system back to the smart operating system. This is typically achieved by a controller that changes the connection path of the peripherals by controlling the control terminal of a single-pole double-throw switch (or similar multiplexing hardware).

[0087] The ultimate goal of this solution is to allow users to “continue using the full functionality of the smart operating system”, meaning that once charging begins, users can seamlessly resume using all the functions of the smart operating system, including applications, internet access, and multimedia.

[0088] This application's solution triggers the default startup of the smart operating system immediately upon detecting the insertion of a charging device when the mobile terminal is in a feature phone system running the basic communication system. During this process, the system sends an explicit switching command to the controller. Upon receiving this command, the controller coordinates and executes a series of operations: first, it shuts down the currently running feature phone system to free up resources and avoid potential conflicts; second, the controller precisely reconnects all shared peripherals, such as the microphone, speaker, earpiece, SIM card, power button, and volume buttons, to the startup smart operating system via corresponding single-pole double-throw switches. This automated and coordinated switching mechanism ensures that the smart operating system immediately gains control of all necessary peripherals after startup, allowing users to seamlessly continue using all the functions of the smart operating system. This solution cleverly solves the problem of needing manual intervention to restore the smart operating system when switching to the feature phone system in low-power mode, greatly improving the convenience of the user experience and the intelligence level of the system.

[0089] The following is a concrete example. Assume a mobile terminal automatically switches to a feature phone system running its basic communication system due to a battery level falling below a second predetermined value. When the user connects the charging port to a charging device, the power management chip inside the mobile terminal immediately detects the charging current input. Upon receiving the charging signal, the feature phone system or its internal low-power microcontroller sends a preset switching command to the controller. Upon receiving this command, the controller first sends a startup signal to the main processor of the smartphone system, initiating the booting of the smartphone operating system. Simultaneously, the controller operates the single-pole double-throw (SPO) switches connected to peripherals sequentially according to preset logic. For example, the controller raises the control port of the first SPO switch, switching the microphone, speaker, and earpiece from the feature phone system to the smartphone system; similarly, the second, third, and fourth SPO switches are also operated by the controller, reconnecting the volume buttons, power button, and SIM card to the smartphone system, respectively. During the smartphone operating system boot process, the controller also sends a shutdown command to the feature phone system to ensure its orderly shutdown. Once the smart operating system is fully booted up and takes over all peripherals, users can immediately use all of its functions, such as browsing the web, running applications, or making video calls, without any manual switching.

[0090] Through the above technical solution, the mobile terminal achieves automation and seamless transition when switching from a feature phone system back to a smart operating system. When a charging device is detected, the system intelligently controls the smart operating system to power on by default and coordinates the shutdown of the feature phone system, while simultaneously reconnecting all peripherals to the smart operating system. This significantly improves the convenience of the user experience, avoiding the cumbersome process of manually restoring the smart operating system's functionality after charging. It ensures that the mobile terminal can quickly and efficiently restore all its functions after power is restored, thereby maximizing the usability of the smart operating system.

[0091] In some of the embodiments described above in this application, a mobile terminal is proposed to switch between a smartphone system and a feature phone system to extend battery life when the battery is low. However, in the feature phone system mode, which only provides basic communication functions, users may not be able to obtain the necessary assistance in emergency situations or when they need location and navigation, thus limiting the practicality and safety of the feature phone system in specific scenarios.

[0092] In this regard, this application further proposes to integrate navigation and SOS emergency call functions into the feature phone system; the SOS emergency call function includes setting up one-click emergency call, as well as issuing emergency call functions in combination with intelligent voice recognition and preset scenario modes.

[0093] The integrated navigation function in a feature phone system refers to the system's ability to have a built-in independent Global Positioning System (GPS) module to receive satellite signals and determine the mobile terminal's precise location. It can also pre-install offline map data, providing basic navigation services even without a network connection, such as displaying the current location, planning simple routes, or indicating directions. Another implementation is that the feature phone system can integrate a simplified navigation application that provides rough location and direction guidance via cellular network base station positioning or a pre-set point-of-interest database. The integrated SOS emergency call function means the feature phone system has the ability to send distress messages or make emergency calls to pre-set contacts or emergency services in emergencies. This function can include automatically sending SMS messages containing location information or automatically dialing emergency numbers. A one-button emergency call function can be triggered via a specific physical button on the mobile terminal (e.g., long press of the volume button, power button, or a dedicated SOS button). When the user presses this button, the feature phone system can immediately initiate a pre-set emergency call process, such as automatically dialing an emergency number or sending a distress SMS message. Another implementation is to add an easily accessible virtual button to the user interface of the feature phone system, allowing the user to trigger the SOS function by clicking the button. Combining intelligent voice recognition with the SOS function means that the user can trigger the SOS function via voice commands. The feature phone system can have a built-in low-power voice recognition module that continuously listens for specific wake words or SOS phrases (e.g., "Help!", "SOS"). When these commands are recognized, the system can automatically initiate the SOS process. Combining preset scenario modes with the SOS function means that the feature phone system can automatically trigger the SOS function based on preset specific scenarios. For example, the mobile terminal can have a built-in accelerometer or gyroscope; when it detects abnormal movement patterns such as a fall or severe impact, the system can automatically determine it as an emergency and trigger an SOS. In addition, users can also preset some scenario modes, such as the system automatically issuing an SOS when the user is inactive or unresponsive for a specific period of time.

[0094] This application's solution integrates navigation and SOS emergency functions into a feature phone system. This allows the mobile terminal, when switched to feature phone mode, to not only provide basic communication but also offer crucial location and emergency assistance services when battery is low or the smartphone system is off. When the mobile terminal's battery level drops below a first predetermined value and it switches to the feature phone system, or is forcibly switched to the feature phone system when the battery level drops below a second predetermined value, the user can still access navigation functions through the feature phone system, such as obtaining directional guidance when lost. Simultaneously, in emergencies, the user can trigger the SOS emergency function through one-click emergency calls, intelligent voice recognition, or preset scenario modes. For example, when the user presses and holds a button or issues a specific voice command, the feature phone system can immediately initiate a preset emergency contact process, automatically dialing an emergency number or sending a distress text message with location information. This design enables the mobile terminal to provide practical functions beyond basic communication even in low-battery or emergency situations, greatly enhancing the user's safety and survival capabilities in extreme circumstances. This solution, combined with a hardware dual-system mobile terminal system switching control method, ensures that even if the smartphone system shuts down due to battery depletion, the feature phone system can still independently operate these critical functions, thus providing continuous emergency support to users throughout the entire lifecycle of the mobile terminal.

[0095] The following is a concrete example. When the mobile terminal's battery level drops below a second predetermined value, the system automatically switches to the feature phone system. At this time, the smartphone system is powered off, and all peripherals are connected to the feature phone system by default. Imagine a user is lost in the wilderness and needs navigation. The feature phone system can provide a simplified navigation interface, obtaining the current location through the built-in GPS module and displaying a pre-installed offline map. The user can zoom and move the map using the feature phone system's directional keys or a simple touchscreen (if equipped) to view the surrounding environment or a preset destination. If the user encounters an emergency, such as accidentally falling, the mobile terminal's built-in accelerometer detects a severe impact and can trigger a preset scenario mode. The feature phone system will immediately activate the SOS emergency call function. The system can automatically send a text message containing the current GPS coordinates to preset emergency contacts and attempt to make emergency calls. Alternatively, the user can also trigger a one-click emergency call function by long-pressing the volume or power button on the feature phone system, or directly say a voice command such as "Help!" The feature phone system's built-in voice recognition module will recognize the command and initiate the same emergency call process.

[0096] Through the aforementioned technical solution, when the mobile terminal's battery is low or the smartphone system is shut down, the feature phone system can not only provide basic communication but also navigation and SOS emergency functions. This significantly enhances the practicality and safety of the mobile terminal in emergency situations. Even with low battery power, users can obtain location guidance to avoid getting lost; simultaneously, through one-click emergency SOS, intelligent voice recognition, and preset scenario modes, users can quickly and effectively send out distress signals, greatly improving the probability of self-rescue and survival in dangerous situations. This design enables the mobile terminal to continuously provide critical life support and auxiliary functions throughout its entire usage cycle, especially in resource-constrained emergency scenarios, thus effectively solving the problem of insufficient functionality of feature phone systems that only provide basic communication in emergency situations, improving user experience and device value.

[0097] In other embodiments, this application proposes a mobile terminal system switching control method based on a dual-hardware system. This method can switch between a smartphone system and a feature phone system based on battery status or a received switching command. However, in actual use, users may need a more flexible and convenient way to actively trigger system switching, and it is necessary to ensure signal integrity and stability during the system switching process to avoid user experience degradation or functional abnormalities due to imperfect switching mechanisms.

[0098] In this regard, this application further proposes that the dual-system switching can be triggered by physical buttons, voice commands, or gestures; the switches for the dual-system switching include multiplexers, analog switches, and / or single-pole double-throw switches.

[0099] Physical buttons are input devices that generate electrical signals through mechanical movements, allowing users to directly operate them to trigger specific functions. Their purpose is to provide an intuitive and reliable hardware interaction method for initiating dual-system switching. For example, a dedicated switching button can be set up; when the user presses this button, the controller receives the corresponding electrical signal and executes the system switching logic. Alternatively, switching can be triggered by combining existing buttons (such as long-pressing the volume or power button), thereby reducing additional hardware costs. Voice commands are an interaction method that executes operations by recognizing the user's spoken commands. Their purpose is to provide a hands-free, natural, and convenient means of system switching. For example, a mobile terminal can have a built-in voice recognition module; when the user speaks a preset wake-up word and switching command (such as "switch to feature phone mode"), the voice recognition module converts the speech into a text command and sends it to the controller to trigger the system switch. Another implementation is that voice commands are processed through a cloud-based voice recognition service, and the recognition results are sent back to the mobile terminal for operation. Gestures are an interaction method that executes operations by recognizing specific actions performed by the user on the screen or through sensors. Their purpose is to provide a contactless or visual means of system switching, enhancing the user experience. For example, users can trigger system switching by drawing specific gestures (such as swiping or drawing circles) on the screen, or by using sensors such as the accelerometer and gyroscope of the mobile terminal to recognize specific air gestures (such as shaking or flipping). A multiplexer is an electronic device that can select one signal from multiple input signals and output it to a single output. In dual-system switching, multiplexers can be used to switch the signal paths of different peripherals (such as microphones, speakers, SIM cards, etc.) from one system to another, ensuring that the peripherals can correctly connect to the currently running system after the switch. Its working principle is to control the selection signal to determine which input channel's signal is transmitted to the output. An analog switch is an electronic switch that can control the on / off state or switch the path of analog signals. In dual-system switching, analog switches can be used to switch the paths of analog signals such as audio signals and data signals, ensuring that these analog signals can be smoothly and losslessly switched from one system to another during system switching. Its working principle is to use the conduction and cutoff characteristics of semiconductor devices to control signal transmission. A single-pole double-throw (SPD) switch is a switch with one input and two outputs, allowing the input to be connected to either output. In dual-system switching, an SPD switch can be used to switch the connection of a peripheral device from a smartphone system to a feature phone system, and vice versa. For example, an SPD switch can control the connection of a SIM card, allowing it to switch between smartphone and feature phone systems. Its working principle involves mechanically or electronically changing the position of the contacts, thereby altering the circuit connection path.

[0100] This application's solution improves the dual-system switching mechanism of a mobile terminal by introducing multiple flexible triggering methods and reliable switching switches. When a user needs to switch systems, they can send a switching request to the controller via physical buttons, voice commands, or gestures. For example, when a user presses a preset physical button, the electrical signal generated by the button is received by the controller; when a user issues a specific voice command, the mobile terminal's voice recognition module parses the command and transmits it to the controller; when a user performs a specific gesture, a sensor or touchscreen transmits the gesture information to the controller. After receiving these switching commands, the controller determines the current system state and the target system according to preset logic and outputs corresponding level signals. These level signals are used to control the dual-system switching switch, which may include a multiplexer, an analog switch, and / or a single-pole double-throw switch. Under the action of the control signals, these switches switch the mobile terminal's power supply, data bus, peripheral connections, and other critical paths from the currently running system (e.g., a smartphone system) to the target running system (e.g., a feature phone system). For example, multiplexers can switch multiple data signal paths, analog switches can switch audio or video signal paths, and single-pole double-throw switches can switch power supplies or specific peripheral connections. This approach not only achieves system-level switching but also ensures that all necessary peripherals can connect synchronously and correctly to the new operating system, guaranteeing a smooth system switch and functional continuity. This diverse triggering mechanism and reliable hardware switch combination allows users to conveniently and stably switch between smartphone and feature phone systems according to different scenarios and personal preferences, greatly enhancing the user experience and system usability.

[0101] In one specific implementation, the mobile terminal can have a dedicated physical button located on the side, which is connected to the controller. When the user presses and holds this button for more than 3 seconds, the controller detects the button signal and identifies it as a dual-system switching command. The controller then outputs a high-level or low-level signal depending on the current system state. For example, if the current system is a smartphone, the controller outputs a high-level signal, which is received by a multiplexer connected between the smartphone and feature phone systems. This multiplexer can be a four-channel analog multiplexer, such as the CD4052B. After its control pin receives a high level, it switches all peripheral signal paths connected to the smartphone system (such as microphone, speaker, SIM card data lines) to the corresponding input terminals of the feature phone system. Simultaneously, the controller also sends a power-off command to the smartphone system and a power-on command to the feature phone system. Furthermore, to achieve voice command switching, the mobile terminal can integrate a low-power voice recognition chip, such as the ESP32-LyraT, which continuously listens for the preset wake-up word "switch mode". Once the wake word and subsequent switching command "feature phone" are detected, the chip sends a switching signal to the controller via the SPI interface. Upon receiving the signal, the controller executes switching logic similar to that triggered by a physical button, controlling the multiplexer and power management unit to switch the system.

[0102] Through the above technical solutions, the dual-system switching of mobile terminals is no longer limited to a single trigger condition, but provides a variety of flexible triggering methods such as physical buttons, voice commands, and gestures, greatly improving the convenience and selectivity of user operation. Users can choose the most suitable interaction method to trigger system switching according to their environment and personal habits, such as using voice commands when it is inconvenient to touch the phone, or using quick gestures in specific scenarios. Meanwhile, by using multiplexers, analog switches, and / or single-pole double-throw switches as the hardware foundation for dual-system switching, it is ensured that the signal paths of each peripheral device can smoothly and reliably switch from one system to another during system switching, avoiding problems such as signal interference, connection interruption, or functional abnormalities. This not only improves the efficiency and success rate of system switching, but also ensures the normal use of peripheral devices after switching, thereby significantly optimizing the overall user experience when switching between smartphone and feature phone systems, making dual-system switching more user-friendly and seamless.

[0103] In some of the embodiments described above in this application, a mobile terminal system switching control method based on a dual-hardware system is proposed. This method switches between a smartphone system and a feature phone system under different battery levels or user commands to optimize battery life and user experience. However, in practical applications, even smartphone systems may face potential security risks such as malware attacks and data leaks when handling highly secure operations such as online banking transactions or accessing sensitive internal company data. This could lead to the theft or alteration of sensitive user information, thereby affecting users' trust in the security of mobile terminals.

[0104] In this regard, this application further proposes that the step of pre-setting a dual system and a controller on the mobile terminal also includes: on the basis of the dual system, a third system connected to the controller is also included, which is an integrated and independent security system, used to switch to the security system when online banking transactions or access to sensitive internal company data are required; the security system has an independent operating environment and encryption mechanism.

[0105] The third system refers to an independent computing environment set up separately within a mobile terminal. It exists in parallel with both smartphone and feature phone systems, but is logically and physically highly isolated. The concept is to provide a dedicated, protected execution area to handle tasks with extremely high security requirements. This third system can be an implementation of a Hardware Security Module (HSM) or Trusted Execution Environment (TEE), for example, it could be a standalone microcontroller or an isolated area within the main processor created using hardware virtualization technology. "Integration" means that this security system is an inherent component of the mobile terminal, not an external device, ensuring close integration and optimized performance with the terminal hardware. "Independence" emphasizes its isolation from smartphone and feature phone systems in terms of operation, resource management, and security policies. This independence can be reflected in having independent processor cores, independent memory regions, independent storage space, and independent power management units, thereby minimizing potential attack surfaces and interference from other systems. This technical feature clarifies the main application scenarios and triggering mechanisms of the third system. When a user launches a specific high-security application (such as a banking app or enterprise VPN client), or when the system detects that the user is attempting to access sensitive data, the controller guides the mobile terminal to switch to this secure system. This switch can be initiated by the user or automatically executed by the system according to preset policies, aiming to provide a non-interference, high-protection operating environment for these critical operations. "Independent operating environment" means that the secure system runs a streamlined, highly optimized operating system or firmware, containing only the minimum components required to perform security tasks, thus reducing potential vulnerabilities. It has independent process space, file system, and network interface, completely isolated from the data and processes of smartphone and feature phone systems. "Encryption mechanism" refers to the secure system's built-in powerful cryptographic algorithms and hardware accelerators for encrypted storage and transmission of sensitive data. This includes symmetric encryption, asymmetric encryption, hash algorithms, and secure key management functions to ensure the confidentiality, integrity, and non-repudiation of data during processing, storage, and transmission. For example, a hardware random number generator (TRNG) can be used to generate high-strength keys, and secure storage areas (such as RPMB partitions in eMMC or UFS) can be used to store keys and sensitive data.

[0106] This application's solution, based on the pre-configured dual systems (smartphone system and feature phone system) and controller 100 on the mobile terminal, further introduces a third system connected to the controller 100. When a mobile terminal user needs to perform highly security-critical operations such as online banking transactions or accessing sensitive internal company data, the controller 100 can identify these high-security scenarios. Once identified, the controller 100 switches the mobile terminal's operating environment from the current smartphone or feature phone system to the third system according to a preset switching instruction. During the switching process, the controller 100 coordinates resource allocation and peripheral connections to ensure that the third system can independently and securely take over the relevant operations. After the third system is activated, its independent operating environment and built-in encryption mechanism provide a highly isolated and protected platform for sensitive operations. For example, all data transmission and storage related to online banking transactions will be encrypted in the secure environment of the third system to prevent eavesdropping and tampering by external systems or malicious software. This design allows the smartphone and feature phone systems to focus on their respective functions, while entrusting high-security tasks to the dedicated third system, thereby significantly improving the security of the mobile terminal's handling of sensitive information without affecting daily use. In this way, the solution proposed in this application effectively addresses the security risks that may be faced when performing sensitive operations in a general operating system environment, providing users with more reliable security protection.

[0107] As a specific implementation method, the above-mentioned technical means can be implemented with reference to the following example. The third system of the mobile terminal can be implemented as a hardware-isolated Trusted Execution Environment (TEE). In this embodiment, a secure area is integrated inside the main processor of the mobile terminal, which is completely isolated from the operating environment of the ordinary operating system (smartphone system). When a user attempts to open an application preset with a high security level, such as a banking app or an encrypted communication app within an enterprise, the controller 100 will detect this operation. The controller 100 will then send an instruction to the main processor, triggering the system to switch to the TEE environment. In the TEE environment, a streamlined and rigorously security-audited microkernel operating system runs, which only loads the minimum code and data required to execute high-security tasks. For example, the critical transaction logic and encryption operations of the banking app will be executed inside the TEE, utilizing the hardware-level encryption engine and secure storage area provided by the TEE to protect keys and transaction data. Meanwhile, the controller 100 ensures that during TEE activation, all sensitive user inputs (such as passwords) and outputs (such as transaction confirmation information) are processed through secure paths, for example, through dedicated display and input channels, preventing interception by malware in the smartphone system. Once the high-security operation is complete, the controller 100 switches the system back to the smartphone system, restoring normal use.

[0108] Through the above technical solution, a third system connected to the controller is introduced on top of the dual-system architecture of the mobile terminal. This third system, as an integrated and independent security system, is specifically designed for high-security scenarios such as online banking transactions or access to sensitive internal company data. This third system possesses an independent operating environment and encryption mechanism, providing hardware-level isolation and robust data protection for sensitive operations. This significantly enhances the security of the mobile terminal when processing critical information, effectively preventing the risks of malware attacks, data theft, and tampering. Users can obtain a higher level of trust and security when performing sensitive operations, thus resolving the security vulnerabilities that exist when performing sensitive operations in a general operating system environment and improving the overall security protection capabilities of the mobile terminal.

[0109] In other embodiments, this application proposes a terminal device including a memory and one or more programs, wherein one or more programs are stored in the memory and configured to be executed by one or more processors, the one or more programs including steps for performing the methods described above.

[0110] The core innovation of this embodiment lies in the physical independent design of the smartphone system and the feature phone system, combined with the controller automatically triggering system switching based on the mobile terminal's battery status. This significantly reduces system power consumption in extremely low-power scenarios, achieving the effect of maintaining basic communication functions for an extended period. Specifically, existing software-level power-saving modes only reduce power consumption by limiting frequency and cores, failing to address the issue of high standby power consumption. This leads to rapid failure of basic communication functions when the battery is severely low. This application employs a hardware-level dual-system switching mechanism. When the mobile terminal's battery level is detected to be below a second predetermined value, the controller triggers the switching of the mobile terminal system to the feature phone system running the basic communication system. It also controls all peripherals to connect to the feature phone system by default, while simultaneously shutting down the smartphone operating system. This design completely shuts down the high-power smartphone system, leaving only the low-power feature phone system running, thus significantly extending the mobile terminal's usability in low-power conditions.

[0111] Through the above technical solution, the mobile terminal can still provide reliable emergency communication capabilities even when the battery is severely depleted. For example, during outdoor activities, when the battery level drops below 5%, the system automatically switches to feature phone mode, allowing users to still make emergency calls without worrying about the smartphone system quickly running out of power. Compared to existing technologies, the solution in this application not only solves the problem of short battery life but, more importantly, ensures communication reliability in emergency rescue scenarios, providing users with a safer user experience.

[0112] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

[0113] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium. When executed, the computer program can include the processes of the embodiments of the above methods. Any references to memory, storage, databases, or other media used in the embodiments provided by this invention can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in various forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), dual data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), Rambus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), etc.

[0114] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A mobile terminal system switching control method based on a hardware dual-system, characterized in that, include: A dual system and a controller are pre-configured on the mobile terminal. The dual system includes an independent smart machine system running a smart operating system and a feature machine system running a basic communication system. The controller is used to identify the status of the two systems and output different levels to control the switching of the dual systems and the switching of peripherals according to the switching command. When the mobile terminal's battery level is detected to be greater than a first predetermined value, the mobile terminal system is controlled to switch to the smart operating system, and all peripherals are controlled to connect to the smart operating system by default, and the feature phone system is turned off. When the mobile terminal's battery level is detected to be lower than a first predetermined value, a prompt will be made asking whether to switch to a feature phone system to extend battery life. When a command to switch to the feature phone system is received or the mobile terminal's battery level drops below a second predetermined value, the system is controlled to switch to the feature phone system running the basic communication system. At the same time, all peripherals are controlled to connect to the feature phone system by default, and the smart operating system is powered off.

2. The mobile terminal system switching control method based on a hardware dual-system according to claim 1, characterized in that, The steps of controlling the mobile terminal system to switch to the feature phone system when a command to switch to the feature phone system is received or the mobile terminal battery level is lower than a second predetermined value, and controlling all peripherals to connect to the feature phone system by default, while controlling the smart operating system to shut down, include: When the mobile terminal system is switched, before the smart operating system is shut down, a command is sent to the controller to control the general input / output port to turn on the feature phone system. At the same time, the controller sets the control port of the single-pole double-throw switch connected to the peripherals high, switching all peripherals' microphones, speakers, earpieces, SIM cards, power buttons, and volume buttons from the smart operating system to the feature phone system. During the shutdown process of the smart operating system, the key data of the mobile terminal's address book and call records are transmitted and synchronized to the feature phone system through the interface to ensure that they can still be accessed in feature phone mode. When the mobile terminal system switches to a feature phone system running a basic communication system, and simultaneously controls the smart operating system to shut down and controls all peripherals to connect to the feature phone system by default, then the system controls and allows the use of basic communication functions such as making calls and sending text messages.

3. The mobile terminal system switching control method based on a hardware dual-system according to claim 1, characterized in that, The step of triggering the switching of the mobile terminal system to the feature phone system when a command to switch to the feature phone system is received or the mobile terminal battery level is lower than a second predetermined value, and controlling all peripherals to connect to the feature phone system by default, while simultaneously controlling the smart operating system to shut down, also includes: When the mobile terminal system is currently a feature phone system running the basic communication system, and it detects that a charging device has been plugged in, it controls the smart operating system to power on by default and sends a switching command to the controller to shut down the feature phone system and reconnect all peripherals to the smart operating system so that all functions of the smart operating system can continue to be used.

4. The mobile terminal system switching control method based on a hardware dual-system according to claim 1, characterized in that, The feature phone system integrates navigation and SOS emergency call functions; the SOS emergency call function includes setting up one-click emergency call, as well as issuing emergency call functions by combining intelligent voice recognition and preset scenario modes.

5. The mobile terminal system switching control method based on a hardware dual-system according to claim 1, characterized in that, The dual-system switching can be triggered via physical buttons, voice commands, or gestures. The switches for dual-system switching include multiplexers, analog switches, and / or single-pole double-throw switches.

6. The mobile terminal system switching control method based on a hardware dual-system according to claim 1, characterized in that, The step of pre-setting up the dual system and one controller on the mobile terminal also includes: In addition to the dual systems, a third system connected to the controller is also included, which is an integrated and independent security system used to switch to the security system when online banking transactions or access to sensitive internal company data are required; the security system has an independent operating environment and encryption mechanism.

7. A mobile terminal, characterized in that, include: A smart device system includes a first operating unit that runs a smart operating system; The feature phone system includes a second operating unit that runs the basic communication system; The controller is connected to the smart phone system and the feature phone system respectively. The controller is used to identify the status of the two systems and output different levels to control the switching of peripherals and the switching of the two systems according to the switching command. The smart phone system and the feature phone system are physically independent and are switched by a controller. When the battery level of the mobile terminal is detected to be greater than a first predetermined value, the mobile terminal system is switched to the smart operating system, and all peripherals are connected to the smart operating system by default, while the feature phone system is turned off. When the mobile terminal's battery level is detected to be lower than a first predetermined value, a prompt will be made asking whether to switch to a feature phone system to extend battery life. When a command to switch to the feature phone system is received or the mobile terminal's battery level drops below a second predetermined value, the system is controlled to switch to the feature phone system running the basic communication system. At the same time, all peripherals are controlled to connect to the feature phone system by default, and the smart operating system is powered off.

8. The mobile terminal according to claim 7, characterized in that, The peripherals include: microphone, speaker, earpiece, SIM card, power button, and volume buttons; The microphone, speaker, and earpiece are connected to the smart phone system and the feature phone system respectively via a first single-pole double-ended switch; The volume keys are connected to the smartphone system and the feature phone system respectively via a second single-pole double-switch. The power button is connected to the smart phone system and the feature phone system respectively via a third single-pole double-ended switch; The SIM card is connected to the smartphone system and the feature phone system respectively via a fourth single-pole double-switch.

9. The mobile terminal according to claim 7, characterized in that, It also includes a charging interface, which is connected to the smartphone system. The mobile terminal uses the mobile terminal system switching control method based on hardware dual system as described in any one of claims 2-6 to perform system switching control.

10. A terminal device, characterized in that, It includes a memory and one or more programs, wherein one or more programs are stored in the memory and configured to be executed by one or more processors, wherein the one or more programs include steps for performing the method as described in any one of claims 1-6.

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