Multi-mode adaptive standby method and device for PDT and low-Earth orbit satellite dual-mode terminals

Abstract

This invention discloses a multi-mode adaptive standby method and apparatus for a dual-mode PDT and low-Earth orbit satellite terminal. Based on the communication requirements, power consumption status, and signal quality of different usage scenarios, a multi-dimensional standby mode is constructed. The method collects user-configured scenario commands for communication needs, terminal device power consumption status, real-time PDT signal quality, and historical periodic signal quality for standby mode determination. It sequentially switches between primary and backup standby modes of the PDT and satellite based on user-specified scenario commands, switches to an energy-saving standby mode based on terminal device power consumption status, and switches between primary / backup or alternating standby modes of the PDT and satellite based on a joint decision of real-time and predicted signal quality. This invention achieves intelligent, automatic, and rapid switching of standby modes, solving problems such as single standby strategies, power waste, response delays, and poor scenario adaptability in existing technologies. It is suitable for scenarios involving wide-area coverage and private network scheduling coordination.

Description

Technical Field

[0001] This invention belongs to the field of private network communication and satellite communication integration technology, specifically involving a multi-mode adaptive standby method and device for a dual-mode terminal of PDT and low-orbit satellite. Background Technology

[0002] PDT (Professional Digital Trunking) walkie-talkies have become core communication equipment in critical industries due to their narrowband low power consumption, reliable trunking dispatch, and encrypted security. However, their communication coverage is highly dependent on ground base stations, making it impossible to communicate in scenarios such as wilderness areas and disaster zones where there are no base stations. Low-Earth orbit satellite communication modules can achieve global wide-area coverage, effectively making up for the blind spots in ground communication and becoming an important supplement to PDT terminals. The dual-mode terminal formed by the integration of the two has become an important carrier for wide-area emergency communication.

[0003] The prior art CN115643587A discloses a multi-mode railway tunnel emergency communication system using satellite communication. This system is designed with a dual-mode architecture of satellite communication channel + 4G / 5G public network communication channel. Fixed priorities are configured for each communication channel, and the high-priority public network channel is used to establish a connection first. The satellite channel is only activated when the public network performance is lower than the threshold. This is a typical static link priority selection scheme without dynamic adaptive adjustment logic. This is also a common technical feature of satellite + public network dual-mode terminals.

[0004] The standby technology of existing PDT and low-Earth orbit satellite dual-mode communication terminals generally adopts a single fixed standby strategy, without dynamically adjusting it based on the actual operating scenario characteristics, signal quality status, and remaining power consumption level. This leads to many technical defects in the practical application of dual-mode terminals, specifically manifested as follows:

[0005] 1. Significant power consumption waste: When the PDT link signal quality is good, the terminal still listens to the satellite link at a high frequency. The continuous standby of the satellite module directly leads to a doubling of the dual-mode standby power consumption, which greatly shortens the terminal's battery life and cannot meet the needs of long-term operation.

[0006] 2. Call response delay: When the PDT link is lost (such as when entering an underground garage or a blind spot in the wild), the satellite link switching delay of the existing technology is ≥3s, which cannot quickly respond to satellite paging and emergency calls, thus missing the dispatch opportunity;

[0007] 3. Poor scenario adaptability: The communication needs of different scenarios such as emergency rescue, urban patrol, and field operations vary significantly (e.g., emergency rescue requires priority to ensure the reliability of satellite communication, while urban patrol requires priority to ensure the dispatch of PDT private network). A single standby strategy cannot take into account the core needs of different scenarios, and the communication experience and reliability are greatly reduced.

[0008] 4. Imbalance between power consumption and reliability: When the battery is low, the terminal does not adjust its standby strategy accordingly and continues to maintain dual-mode high-frequency monitoring, causing the terminal to power down quickly; while in signal fluctuation scenarios, the monitoring frequency is not increased, which easily leads to missed paging detections, with a missed detection rate of ≥5%.

[0009] 5. Lack of unified mode scheduling logic: The dual-mode modules standby independently, without a mode selection and switching mechanism based on multi-dimensional parameters. It all depends on manual adjustment by the user, which is cumbersome and cannot adapt to dynamically changing communication environments. In emergency scenarios, communication failures are easily caused by untimely operation.

[0010] In summary, existing standby technologies for dual-mode communication terminals (such as PDT and public network dual-mode, satellite and public network dual-mode) do not employ multi-mode adaptive standby strategies. They can only achieve simple simultaneous dual-mode monitoring or manual switching, failing to address the core issues of power consumption waste, response latency, and poor scenario adaptability. There is an urgent need for a multi-mode adaptive standby method and device that can dynamically adjust the standby strategy based on signal quality, power consumption status, and scenario requirements. Summary of the Invention

[0011] To address the shortcomings of existing technologies and achieve a dynamic balance between signal quality, power consumption, and response speed during standby in dual-mode terminals, thus adapting to the communication needs of different application scenarios, this invention adopts the following technical solution:

[0012] The multi-mode adaptive standby method for PDT and low-Earth orbit satellite dual-mode terminals includes the following process:

[0013] Based on the communication requirements, power consumption status, and signal quality of different usage scenarios, a set of standby modes is constructed;

[0014] Collect user-configured scenario commands for communication needs, terminal device power consumption status and signal quality, real-time PDT signal quality, and historical periodic signal quality;

[0015] A signal trend prediction model is constructed based on historical periodic signal quality and real-time signal quality to obtain the predicted signal quality value;

[0016] The system sequentially switches between the primary / standby standby modes of the PDT and satellite based on user-specified scenario commands, switches to the energy-saving standby mode based on the power consumption status of the terminal device, and switches between the primary / standby or alternating standby modes of the PDT and satellite based on a joint decision of real-time signal quality and predicted signal quality.

[0017] Furthermore, a weighted moving average algorithm is used for signal trend prediction, as shown in the formula:

[0018] Sr = α×S1 + β×S2 + γ×S3

[0019] Where Sr represents the predicted signal quality value, S1 represents the signal quality of the current period, S2 represents the signal quality of the previous period, S3 represents the signal quality of the previous two periods, and α, β, and γ represent the weighting coefficients of the signal quality of each period, satisfying α+β+γ=1, and α>β>γ.

[0020] The weighting coefficients can be adaptively configured according to the scenario, with α=0.5, β=0.3, and γ=0.2 being preferred.

[0021] Furthermore, the standby modes include a primary / backup collaborative monitoring mode and a signaling collaborative monitoring mode. In the primary / backup collaborative monitoring mode, the PDT is the primary satellite with the secondary satellite as backup; in the signaling collaborative monitoring mode, the satellite is the primary PDT with the secondary satellite as backup. The system switches to either the primary / backup collaborative monitoring mode or the signaling collaborative monitoring mode according to the user-specified scenario command. The primary / backup collaborative monitoring mode is suitable for scenarios with good PDT signal and sufficient power (urban patrols, private network coverage areas), while the signaling collaborative monitoring mode is suitable for scenarios where the PDT signal is lost or in emergency situations (disaster areas, blind spots in the wild, emergency rescue).

[0022] Furthermore, if there is no user scenario instruction, it is determined whether the terminal's remaining power meets the first power threshold; if it does, it enters the energy-saving standby mode; if it does not, a joint decision is made based on the real-time signal quality and the predicted signal quality.

[0023] Furthermore, the joint decision rule is as follows:

[0024] If the real-time signal quality is ≥-95dBm and the predicted signal quality is ≥-95dBm, then enter the primary / backup collaborative monitoring mode.

[0025] If -110dBm ≤ real-time signal quality < -95dBm or -110dBm ≤ predicted signal quality < -95dBm, then enter alternating monitoring mode;

[0026] If the real-time signal quality is less than -110dBm or the predicted signal quality is less than -110dBm, then enter the signaling cooperative monitoring mode.

[0027] The first quality threshold is -110dBm, the second quality threshold is -95dBm, and the first energy threshold is <10%.

[0028] Furthermore, the alternating standby mode is a time-slot alternating monitoring mode, in which the PDT and satellite are monitored alternately in time slots, which is suitable for scenarios with PDT signal fluctuations and moderate battery levels (field operations, signal edge areas).

[0029] Furthermore, the method also includes detecting the power attenuation slope, calculated using the following formula:

[0030] K = (E 前 – E当 ) / Δt

[0031] Where K represents the rate of energy decay, E 前 E represents the energy level in the previous cycle. 当 The current cycle charge is represented by Δt, which represents the detection time interval.

[0032] The power decay slope threshold can be adaptively configured according to the scenario, with K_threshold = 1.5% / min being the preferred setting;

[0033] When K > K_threshold, it is determined that the battery is abnormally rapidly depleting.

[0034] Regardless of whether the current remaining power meets the power decay slope threshold, the system is forced to enter the energy-saving standby mode in advance.

[0035] Furthermore, after executing the corresponding standby mode, it is determined whether the terminal device has been powered off or given an end command. If so, the device is powered off or given an end command; otherwise, the data collection continues.

[0036] A multi-mode adaptive standby device for a PDT and low-Earth orbit satellite dual-mode terminal includes a central control unit and a PDT module and a low-Earth orbit satellite module respectively connected to the central control unit. The device also includes a signal quality detection module and a device power consumption detection module respectively connected to the central control unit. The signal quality detection module is further connected to both the PDT module and the low-Earth orbit satellite module. According to the multi-mode adaptive standby method for the PDT and low-Earth orbit satellite dual-mode terminal, a standby mode is established through the central control unit, and mode switching is controlled. The device also includes a PDT antenna connected to the PDT module, a satellite antenna connected to the low-Earth orbit satellite module, and a power supply module connected to the central control unit. The device power consumption detection module is a power detection module.

[0037] The advantages and beneficial effects of this invention are as follows:

[0038] This invention automatically selects the optimal standby mode based on multi-dimensional parameters such as PDT link signal quality, terminal remaining power, and user scenario commands, adapting to different application scenarios such as urban areas, wilderness, and emergency situations. This invention achieves rapid and seamless switching between standby modes, with a primary / backup mode switching latency of ≤200ms, far lower than the 3s switching latency of existing technologies, ensuring real-time call response. This invention addresses the core requirements of private network priority, low power consumption, and emergency coverage, minimizing power consumption when the PDT signal is good, quickly switching to satellite primary standby when the PDT signal is lost, and achieving extreme energy saving when the battery is low. This invention achieves zero missed detections in paging monitoring, with a missed detection rate of ≤1%, meeting the real-time requirements of cluster scheduling and satellite paging. The dual-mode standby power consumption of this invention is close to that of single-mode PDT standby, meeting the needs of long-term operation.

[0039] The signal trend prediction and dual-signal joint decision mechanism established in this invention avoids frequent false switching caused by instantaneous signal fluctuations, further improving mode stability; the power attenuation slope detection can predict situations of excessive power consumption in advance, preventing sudden shutdown in emergency scenarios, and significantly enhancing battery life stability. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the device in an embodiment of the present invention.

[0041] Figure 2 This is a flowchart of the method in an embodiment of the present invention.

[0042] Figure 3 This is a flowchart of the mode adaptive determination process in an embodiment of the present invention. Detailed Implementation

[0043] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0044] like Figure 1 As shown, this invention provides a multi-mode adaptive standby device for a dual-mode PDT and low-Earth orbit satellite terminal. Based on the design concepts of unified scheduling, intelligent judgment, seamless switching, and scenario adaptation, it constructs a four-level standby mode system, designs a multi-dimensional mode selection and judgment mechanism and a fast seamless switching logic, and combines real-time signal quality monitoring and accurate user command recognition to achieve intelligent adaptive adjustment of the standby mode. The device hardware architecture mainly includes 8 modules:

[0045] PDT antenna: Responsible for receiving ground-based PDT trunking communication signals and transmitting the signals processed by the PDT module. The PDT antenna is the physical channel for equipment to access the ground mobile communication network and realize voice calls and data transmission.

[0046] The PDT module performs demodulation, decoding, encryption, and verification on the received PDT antenna signals; simultaneously, it encodes and modulates the voice or data signals to be transmitted before sending them to the PDT antenna. The PDT module is the core unit of the equipment supporting terrestrial PDT trunking services.

[0047] Satellite antenna: Responsible for receiving relay signals from low-Earth orbit (LEO) satellites and transmitting the processed signals back to the satellites. In areas without terrestrial signal coverage, the satellite antenna is the only channel for establishing a communication link.

[0048] Low Earth Orbit (LEO) satellite module: performs demodulation, despreading, and decryption of satellite signals received by the satellite antenna; encodes and spreads the service data to be transmitted before sending it to the satellite antenna.

[0049] Signal quality detection module: Collects parameters such as Received Signal Strength Indication (RSSI) and Bit Error Rate (BER) from the PDT module and the low-Earth orbit satellite module respectively; feeds back the detection data to the central control unit (MCU) to provide data support for communication link switching.

[0050] Power detection module: Collects parameters such as the output voltage, current and remaining power percentage of the power module; transmits the power data to the central control unit (MCU) in real time to realize low power warning and power management strategy execution.

[0051] Power module: Provides stable voltage and current output for each hardware module of the terminal, works with the power detection module to collect power status, and executes power consumption control strategies according to the instructions of the MCU.

[0052] Central Control Unit (MCU): Receives data from the signal quality detection module and the power detection module, performs logical analysis; automatically or manually triggers link switching between PDT and satellite communication based on signal quality; coordinates the collaborative work of various units such as the PDT module, low-orbit satellite module, and power supply module; processes user commands and provides feedback on equipment operating status.

[0053] like Figure 2 As shown, based on the above-mentioned device, the present invention also provides a multi-mode adaptive standby method for a PDT and low-orbit satellite dual-mode terminal. This method constructs a four-level standby mode system, designs a multi-dimensional mode selection and determination mechanism, and achieves rapid and seamless switching between modes. Simultaneously, it incorporates dedicated standby logic for each mode, balancing power consumption, reliability, and response speed. This method can be applied to handheld dual-mode walkie-talkies, vehicle-mounted dual-mode communication terminals, portable emergency dual-mode communication devices, etc., and specifically includes the following steps:

[0054] Step S1: Construct a four-level standby mode system;

[0055] Based on the communication requirements, signal quality, and power consumption status of different scenarios, four standby modes are designed: primary / backup collaborative monitoring mode, time-slot alternating monitoring mode, signaling collaborative monitoring mode, and energy-saving standby mode. The positioning, core applicable scenarios, and core characteristics of each mode are as follows, achieving full scenario coverage from "private network priority" to "emergency blind spot filling" to "ultimate energy saving". The comparison of the four modes is shown in Table 1:

[0056] Table 1 Comparison of the Four Modes

[0057]

[0058] Step S2: Establish a multi-dimensional pattern selection and determination mechanism;

[0059] Based on user-configured scenario commands, remaining battery power data, and dual-mode link data from the signal quality detection unit, the MCU constructs a three-level judgment logic to automatically select the standby mode. The judgment condition is a hard threshold, requiring no manual intervention, thus ensuring the accuracy and real-time nature of the judgment. Figure 3 As shown, the specific logic for adaptive pattern determination is as follows:

[0060] Step S2.1: Collect three key elements, specifically including:

[0061] 1) User scenario commands;

[0062] 2) Remaining battery percentage on the terminal;

[0063] 3) PDT link signal quality RSSI (Received Signal Strength Indication) value;

[0064] 4) Historical periodic signal quality.

[0065] Step S2.2: Calculate the predicted signal quality using a weighted moving average algorithm.

[0066] Sr = α×S1 + β×S2 + γ×S3

[0067] Where Sr is the predicted signal quality value, S1 is the signal quality of the current period, S2 is the signal quality of the previous period, S3 is the signal quality of the two previous periods, and α, β, γ are weighting coefficients that satisfy α+β+γ=1 and α>β>γ.

[0068] Step S2.3: Determine if it is a user scenario command. If so, switch to emergency mode or private network mode according to the user scenario command.

[0069] Otherwise, check the remaining battery level of the terminal; if it is less than 10%, switch to power-saving standby mode.

[0070] If ≥10%, a joint decision is made using both real-time and predicted signals:

[0071] ① RSSI≥-95dBm and Sr≥-95dBm → Primary / backup collaborative monitoring

[0072] ② -110dBm≤RSSI<-95dBm or -110dBm≤Sr<-95dBm→Alternate monitoring

[0073] ③ RSSI < -110dBm or Sr < -110dBm → Signaling Co-monitoring

[0074] This invention also includes power attenuation slope detection, calculated using the following formula:

[0075] K = (E 前 – E 当 ) / Δt

[0076] Where K represents the rate of energy decay, E 前 E represents the energy level in the previous cycle. 当 The current cycle charge is represented by Δt, which represents the detection time interval.

[0077] The power decay slope threshold can be adaptively configured according to the scenario, with K_threshold = 1.5% / min being the preferred setting;

[0078] When K > K_threshold, it is determined that the battery is abnormally rapidly depleting.

[0079] Regardless of whether the current remaining power meets the power decay slope threshold, the system is forced to enter the energy-saving standby mode in advance.

[0080] Step S2.4: Determine if the terminal has been powered off or given an end command. If yes, power off or give an end command; otherwise, return to step S2.1 to continue collecting elements.

[0081] The corresponding pattern determination rules are as follows:

[0082] First priority: User scenario commands;

[0083] If the user enables emergency mode, the system will directly and forcibly switch to signaling cooperative monitoring mode to prioritize the reliability of satellite emergency communication, without being limited by other parameters; if the user enables private network mode, the system will prioritize primary and backup cooperative monitoring mode to ensure priority for PDT private network scheduling.

[0084] Second priority: Remaining battery power on the device;

[0085] If the terminal's remaining battery power is less than 10%, it will directly enter the energy-saving standby mode, turn off all satellite module monitoring functions, and only retain PDT low-power monitoring to achieve extreme energy saving; if the remaining battery power is ≥10%, it will be determined based on the PDT link quality.

[0086] Third priority: PDT link quality;

[0087] Adjust the operating mode based on the RSSI value:

[0088] (1) If the PDT link quality is good (RSSI≥-95dBm and Sr≥-95dBm), select the primary / backup collaborative monitoring mode;

[0089] (2) If the PDT link quality fluctuates (-110dBm≤RSSI<-95dBm or -110dBm≤Sr<-95dBm), select the time-slot alternating monitoring mode;

[0090] (3) If the PDT link is completely lost (RSSI<-110dBm or Sr<-110dBm), select the signaling cooperative monitoring mode.

[0091] Execution frequency of decision logic: The MCU performs a mode selection decision every 100ms, and senses parameter changes in real time to ensure timely mode selection.

[0092] In this embodiment of the invention, a real-world network test was conducted based on a handheld PDT and a low-orbit satellite dual-mode terminal to verify the effectiveness of the invention. The test environment covered four typical scenarios: urban private network coverage area, field signal edge area, no ground signal blind spot, and low-power operation scenario. The test parameters included core indicators such as mode switching delay, dual-mode standby power consumption, paging missed detection rate, and standby time. The test data was also compared with existing technology test data. Specific verification data are shown in Table 2.

[0093] Table 2 Comparison of measured indicators between the present invention and the prior art

[0094]

[0095] This test lasted a total of 72 hours, covering real-world application scenarios such as police patrols, field exploration, emergency rescue simulations, and continuous operation under low power conditions. Through the actual measurement and comparison of core indicators, the technical feasibility and performance advantages of this invention were verified. Compared with existing technologies, all core technical indicators of this invention have achieved qualitative improvements in mode switching speed, standby power consumption control, communication reliability, and scenario adaptability, fully validating its technical feasibility and practical application value.

[0096] In summary, this invention overcomes the limitations of a single standby strategy, achieving deep adaptation of standby mode with scene, signal, and power consumption, and has the following significant effects:

[0097] 1. Accurate adaptation across all scenarios, solving the problem of poor scenario adaptability: By constructing a four-level standby mode system, corresponding to the four core requirements of private network priority, balanced power consumption and reliability, emergency blind spot filling, and extreme energy saving, it adapts to all typical application scenarios such as urban patrol, field operation, emergency rescue, and low power operation, meeting the communication needs of different industries and scenarios.

[0098] 2. Automatic mode selection and rapid switching solve the response delay problem: Automatic mode selection is achieved based on a multi-dimensional three-level judgment mechanism, with a switching delay of ≤200ms, which is far lower than the 3s of existing technologies, ensuring real-time response to calls in emergency scenarios and avoiding missing dispatch opportunities;

[0099] 3. Dynamic balance between power consumption and reliability solves the problem of power waste: Each mode is equipped with a dedicated power consumption control strategy to minimize power consumption while ensuring core communication needs. The dual-mode standby power consumption is ≤105mW, which is close to the single-mode PDT standby power consumption, achieving a significant reduction in power consumption and extending the terminal's battery life to more than 20 hours to meet the needs of long-term operation.

[0100] 4. No manual intervention required, easy to operate: Based on quantitative hardware thresholds, the mode is automatically selected and switched without manual intervention. Users only need to activate the emergency mode in emergency scenarios, which solves the problem of existing technologies relying on manual switching and cumbersome operation. It is especially suitable for high-intensity operation scenarios such as emergency rescue.

[0101] 5. Strong hardware compatibility and easy industrialization: It does not require major modifications to the hardware structure of the existing PDT terminal. Only a power consumption status sensing unit and a dual-mode collaborative control unit need to be added. It can be directly upgraded on the basis of the existing PDT terminal, with low modification cost and strong promotion.

[0102] 6. Flexible parameter configuration to adapt to different devices: Parameters such as time slot length, wake-up period, signal quality threshold, and power threshold can be flexibly configured according to actual application scenarios. At the same time, it can be adapted to low-orbit satellite modules and PDT modules of different brands, with strong compatibility.

[0103] 7. Signal trend prediction and joint decision: By predicting signal trends and making joint decisions based on two signals, the model becomes more stable, avoiding frequent false switching caused by instantaneous signal fluctuations.

[0104] 8. Battery Degradation Slope Protection: By predicting rapid power consumption in advance, it avoids emergency scenarios such as sudden shutdown, thus making the battery life safer.

[0105] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A multi-mode adaptive standby method for a dual-mode terminal of PDT and low-Earth orbit satellite, characterized in that: Based on the communication requirements, power consumption status, and signal quality of different usage scenarios, a set of standby modes is constructed; Collect user-configured scenario commands for communication needs, terminal device power consumption status, real-time PDT signal quality, and historical periodic signal quality; A signal trend prediction model is constructed based on historical periodic signal quality and real-time signal quality to obtain the predicted signal quality value; The system sequentially switches between the primary and backup standby modes of PDT and satellite based on user-specified scenario commands, switches to energy-saving standby mode based on the power consumption status of the terminal device, and switches between the primary and backup standby modes or alternating standby modes of PDT and satellite based on a joint judgment of real-time signal quality and predicted signal quality.

2. The method according to claim 1, characterized in that: The weighted moving average algorithm is used for signal trend prediction, and the formula is as follows: Sr = α×S1 + β×S2 + γ×S3 Where Sr represents the predicted signal quality value, S1 represents the signal quality of the current period, S2 represents the signal quality of the previous period, S3 represents the signal quality of the previous two periods, and α, β, and γ represent the weighting coefficients of the signal quality of each period, satisfying α+β+γ=1, and α>β>γ.

3. The method according to claim 1, characterized in that: The primary / backup standby mode includes a primary / backup collaborative monitoring mode and a signaling collaborative monitoring mode. In the primary / backup collaborative monitoring mode, the PDT is the primary satellite and the satellite is the backup. In the signaling collaborative monitoring mode, the satellite is the primary PDT and the satellite is the backup. The system switches to either the primary / backup collaborative monitoring mode or the signaling collaborative monitoring mode according to the scenario command specified by the user.

4. The method according to claim 1, characterized in that: If there is no user scenario instruction, it is determined whether the terminal's remaining power meets the first power threshold; if it does, it enters the energy-saving standby mode; if it does not, a joint decision is made based on the real-time signal quality and the predicted signal quality.

5. The method according to claim 4, characterized in that: The joint judgment rule is as follows: If the real-time signal quality is ≥-95dBm and the predicted signal quality is ≥-95dBm, then enter the primary / backup collaborative monitoring mode. If -110dBm ≤ real-time signal quality < -95dBm or -110dBm ≤ predicted signal quality < -95dBm, then enter alternating standby mode; If the real-time signal quality is less than -110dBm or the predicted signal quality is less than -110dBm, then enter the signaling cooperative monitoring mode.

6. The method according to claim 5, characterized in that: The joint decision rule is as follows: the alternating standby mode is a time-slot alternating listening mode, in which time slots are used to alternately listen between the PDT and the satellite.

7. The method according to claim 4, characterized in that: The method also includes power attenuation slope detection, calculated using the following formula: K = (E 前 - AND 当 ) / Δt Where K represents the rate of energy decay, E 前 E represents the energy level in the previous cycle. 当 The current cycle charge is represented by Δt, which represents the detection time interval. When K > preset threshold, the power saving standby mode will be entered in advance, regardless of whether the current power level meets the first power threshold.

8. The multi-mode adaptive standby method for a PDT and low-orbit satellite dual-mode terminal according to claim 1, characterized in that: After executing the corresponding standby mode, determine whether the terminal device has been powered off or given an end command. If so, power off or give an end command; otherwise, continue the data collection process.

9. A multi-mode adaptive standby device for a dual-mode PDT and low-Earth orbit satellite terminal, comprising a central control unit and a PDT module and a low-Earth orbit satellite module respectively connected to the central control module, characterized in that: The device further includes a signal quality detection module and a device power consumption detection module, which are respectively connected to the central control module. The signal quality detection module is also connected to the PDT module and the low-orbit satellite module. According to the multi-mode adaptive standby method of the PDT and low-orbit satellite dual-mode terminal according to any one of claims 1 to 8, the central control unit constructs a standby mode and controls the mode switching.

Images