403 results about "Signal interaction" patented technology

Various aspects of the present disclosure relate to methods, apparatuses, and systems that support configuration for radio sensing. For instance, implementations provide for configuration of sensing-related nodes with knowledge of background environments related to specific radio sensing scenarios to assist in sensing receiver processing. Further, knowledge of features of a background environment can be used as assistance information for extracting sensing information for target objects, such as based on information pertaining to signal interactions between a background environment and target objects.

The invention provides a disease course record generation method and system based on a mobile terminal and multi-modal data, and the method comprises the following steps: firstly constructing a directional collection channel and a ward round session associated with a specific patient through the signal interaction between the mobile terminal and a sickbed; in the session, multi-modal data streams with timestamps, such as voice, images and operation instructions, are obtained in real time, and audio semantic anchor points and visual semantic anchor points are extracted from the multi-modal data streams. And constructing an image-text semantic unit by calculating and associating the audio and video anchor points of which the semantic similarity exceeds a threshold. And taking the unit as a current observation state, and verifying the legality of the state transition through a finite-state machine model. And based on the image-text semantic units passing the verification, template slot filling and term standardization are carried out, and a structured disease course record data packet is generated and written back to the HIS system. The method has the effect of improving the working efficiency and quality of clinical documents.

The invention discloses an intelligent operation and maintenance monitoring and management platform for an energy station, and belongs to the technical field of energy station management systems. The problems that in existing operation and maintenance, equipment association is fuzzy, an acquisition strategy is solidified, fault root causes are difficult to position, and disposal is low in efficiency are solved. The equipment association modeling module integrates multi-dimensional data such as energy transmission and signal interaction, calculates a comprehensive coupling degree and divides grades, and generates a core equipment coupling relation matrix; the acquisition strategy optimization module dynamically adjusts the acquisition frequency of the acquisition strategy optimization module and associated equipment according to the importance degree and the running state of the equipment, and generates a time sequence associated data set; the fault diagnosis and root cause tracing module is used for constructing a three-dimensional fault conduction topological graph, accurately judging faults, quantifying levels, positioning root causes, outputting a diagnosis report and carrying out operation and maintenance according to hierarchical logic; according to the invention, equipment association quantification, intelligent optimization of an acquisition strategy and efficient fault full-link disposal are realized, the intelligence and refinement level of operation and maintenance of the energy station is improved, and stable operation of equipment is guaranteed.

The present application relates to the technical field of wireless communications, and discloses a resource allocation method, apparatus and device, a storage medium and a product, comprising: receiving a scheduling request signaling sent by a user equipment, and determining a signaling interaction time between the user equipment and a base station; sending an initial allocation signaling to the user equipment based on the scheduling request signaling and the signaling interaction time; determining target cache data according to the data cache state and a historical data cache state reported by the user equipment last time; and allocating uplink resources to the user equipment based on the target cache data, and sending a target allocation signaling corresponding to the target cache data to the user equipment. According to the method, multiple cache time slots are allocated to the user according to the signaling interaction time between the user and the base station, so that multi-thread uplink resource allocation is initiated, the user equipment can instantly report a data cache state to a satellite, and user data can be more instantly allocated with resources and transmitted.

The invention discloses a whole vehicle power hardware-in-the-loop simulation test system and method under a P2.5 + P4 hybrid architecture. The whole vehicle power hardware-in-the-loop simulation test system comprises a controller, a test cabinet and an upper computer system, the hybrid power gearbox control system is electrically connected with the high-voltage control system; the test cabinet is electrically connected with the hybrid power gearbox control system, the high-voltage control system and the upper computer system; the upper computer system comprises a management module, a signal interface module, a controller interface module and a virtual simulation vehicle module, the management module is connected with the test cabinet and the signal interface module, and the signal interface module is used for realizing signal interaction between the controller interface module and the management module; the controller interface module is connected with the signal interface module, the Soft ECU module and the power simulation module. Standardized development of the power simulation test system is realized, the modular design supports rapid adaptation of different vehicle type platforms and power architectures, and repeated development is reduced.

The invention discloses an application method, system, equipment and medium of plant inspection navigation in a two-ticket intelligent management and control system based on AOA positioning, and belongs to the technical field of positioning navigation, and the application method comprises the following steps: setting a Bluetooth AOA transmitting base station and a Bluetooth AOA module positioning tag in an inspection area, carrying out signal interaction, and constructing an inspection space model; obtaining an interaction signal between the mobile Bluetooth transmitter and the Bluetooth AOA transmitting base station when an inspector carrying the mobile Bluetooth transmitter enters the inspection area, calculating the distance between the inspector and the Bluetooth AOA transmitting base station according to the signal intensity, and determining the real-time position of the inspector in the inspection space model; an inspection navigation route is generated according to the real-time position of the inspector, a preset inspection route and the work ticket information and the operation ticket information provided by the two-ticket intelligent management and control module; and when the inspector arrives at the inspection point and a preset card punching condition is satisfied, recording inspection card punching information and generating an inspection record. According to the invention, the inspection efficiency and safety are improved.

The invention provides a system platform and method for checking adjustment characteristics of a control system based on semi-physical simulation, and belongs to the technical field of power system control equipment detection. The system comprises an all-digital real-time simulation system (ADPSS), a water turbine governor to be tested, a physical interface communication module, a wave recording device and a signal interaction module. A full-electromagnetic example model constructed based on PSASP is built in the ADPSS, a closed-loop detection environment is constructed through the physical interface communication module and a water turbine governor to be detected, bidirectional signal transmission is achieved through the signal interaction module, and key parameters are recorded through the wave recording device. The method comprises the steps of simulation environment establishment, signal interactive transmission, multi-dimensional detection and check and result judgment and output. According to the method, multi-dimensional checking of the speed regulator acquisition and display function, the transfer function consistency, the grid-connected performance and the like and power grid stability influence verification can be completed without field installation, the coverage scene is comprehensive, the checking precision is high, and the method is suitable for performance detection of different types of speed regulators and has remarkable practical value.

The invention provides an AI-driven multi-wireless-signal candid photographing detection device which comprises a mounting shell, a hardware acquisition layer, an edge computing layer, a cloud federation layer and a man-machine interaction layer, and all the layers achieve signal interaction through PCIe4.0 and SPI hardware interface communication protocols. The broadband patch antenna, the ceramic antenna and the helical antenna are adopted to cover a full target frequency band, the millimeter wave radar chip is matched, the 16 * 16 metamaterial RIS panel is additionally configured, and the weak signal receiving power is improved by synchronously controlling a reflection phase focusing signal, so that the problem of missing detection is solved; the multi-signal tensor decomposition unit and the CNN-LSTM signal classification unit construct frequency, intensity, time and phase four-order tensors, and overlapped signals are separated through Khatri-Rao space-time coding; a three-layer CNN and a two-layer LSTM are combined, precise classification of candid photographing signals is realized, the misjudgment rate is reduced, millimeter wave assisted precise distance measurement is combined with millimeter wave flight time data and an RSSI attenuation model, a distance measurement error is controlled through a dynamic weighting algorithm, and the problem of positioning misalignment is solved.

The invention relates to the technical field of integrated control systems, in particular to an integrated control system and method for hollow filter stick forming equipment, and the method comprises the steps: taking an embedded controller for running a real-time operating system as a control decision module, and carrying out the unified execution of all control algorithms; an Ethernet protocol with microsecond-level period and precise clock synchronization is used as a real-time communication module to form a system backbone network; the execution and acquisition layer integrates a motion control module composed of a servo driver and a motor as a network slave station, a signal interaction module composed of a distributed I / O module, and a subsystem integration module formed by bridging a third party subsystem through a communication gateway. According to the system, all key units are deeply integrated into the same real-time network as slave stations, so that centralized management, real-time synchronization and refined closed-loop control of the whole system are realized.

The invention relates to the technical field of obstetrical fetal heart monitoring, in particular to an obstetrical fetal heart intelligent monitoring method and system, and the method comprises the following steps: S1, data collection: collecting fetal heart signals through wearable equipment; s2, data preprocessing: acquiring fetal heart monitoring parameters; s3, self-adaptive adjustment of the personalized physiological state: dynamically adjusting fetal heart monitoring parameters by applying a self-adaptive algorithm; s4, data analysis and prediction, wherein the adjusted fetal heart monitoring parameters are analyzed, and the health problem of the fetus is predicted; s5, dynamic multi-mode signal interaction analysis: identifying relevance among multi-mode signals, performing abnormal mode detection, and performing comprehensive evaluation; and S6, visualization and user interaction: developing a user interface based on Web and mobile applications. According to the invention, the relevance among various signals can be comprehensively captured and analyzed, the abnormal mode can be accurately identified, and the accuracy and reliability of fetal health monitoring can be improved.

A gas-layer drag reduction system applied to a large ship, and a ship. The gas-layer drag reduction system (100) comprises: a gas supply system (200), a pressure stabilizing system (300), a gas injection system (400), a monitoring system (500), and an intelligent management system (600), wherein the gas injection system (400) is configured to inject a gas into water by means of the bottom of a ship and form a stable gas layer at the bottom of the ship; the monitoring system (500) is configured to monitor operation information, gas state information, navigation environment information, ship state information and gas-layer state information of the gas-layer drag reduction system (100); the intelligent management system (600) is configured to receive feedback signals of the gas supply system (200), the pressure stabilizing system (300), the gas injection system (400) and the monitoring system (500), and send control signals to the gas supply system (200), the pressure stabilizing system (300), the gas injection system (400) and the monitoring system (500); and the intelligent management system (600) is also configured to control the gas-layer drag reduction system (100) to perform signal interaction with a ship system (110), so as to implement intelligent control. Therefore, the gas-layer drag reduction system (100) is suitable for large ships.

The utility model discloses an externally-hung movable type flexible tightening workstation, and belongs to the technical field of engine assembly. An electric gun controller, a blocking cylinder and a signal interaction processing module are fixed on the mounting platform; the signal interaction processing module comprises a counter, a signal display lamp, a reset sensor and an electromagnetic valve; the electric gun controller is connected with the tightening gun; the electric gun controller is in signal transmission connection with the counter, the counter is in signal transmission connection with the signal display lamp and the electromagnetic valve, the electromagnetic valve is in signal transmission connection with the blocking air cylinder, and the reset sensor is in signal transmission connection with the electric gun controller, the counter, the signal display lamp, the electromagnetic valve and the blocking air cylinder. According to the utility model, the automatic tightening operation is realized, the low-efficiency operation of manually tightening by using a torque limiting wrench is avoided, the fault of equipment or a handheld electric gun can be quickly responded, the process of manually tightening by using a blower gun and the torque limiting wrench is reduced, the assembly quality of an engine is improved, and the smoothness and efficiency of the production process are improved.

This invention discloses a ranging method and system based on a network data link, relating to the field of wireless communication ranging technology. The method includes the following steps: synchronizing the clocks of all nodes in the network and aligning the transmit and receive timings between nodes; each node in the network transmitting a synchronization signal within its allocated fixed transmission time slot according to a preset fixed frame structure; the receiving node calculating the theoretical time at which it receives the synchronization signal when the signal propagation delay is zero based on the synchronization clock and the preset fixed frame structure, and recording the actual time of receiving the synchronization signal; and the receiving node calculating the distance between itself and the node that transmitted the synchronization signal based on the time difference between the theoretical and actual times. This invention effectively eliminates ranging errors caused by crystal oscillator clock deviations between nodes, requires no external satellite signals or two-way signaling interaction, and achieves ranging by multiplexing the synchronization signal. It significantly reduces hardware costs while achieving high-precision, low-latency, and environmentally adaptable inter-node ranging.

This invention discloses a method for storing and providing early warning of vibration acceleration data of motor bearings. The system collects vibration acceleration signals from motor bearings using a vibration acceleration sensor, and uses this data to determine the cause of bearing failures and provide early warnings. Simultaneously, a data feedback terminal provides feedback on the actual cause of the failure to supplement and correct the vibration fault database, improving the accuracy of vibration fault diagnosis and early warning. The system is characterized by including a vibration acceleration sensor, an edge cloud, a data storage backend, and a data feedback terminal. The vibration acceleration sensor establishes signal interaction with the data storage backend, the data storage backend establishes signal interaction with the edge cloud, and the data feedback terminal establishes signal interaction with the edge cloud. The vibration acceleration sensor is positioned near the bearing on the motor for continuous data collection of vibration acceleration signals. The data storage backend includes a signal conversion module and a data processing module for data conversion and comparative analysis of the vibration acceleration signals.

The application discloses a robot joint driving board external control method, system and related device, which is used for realizing the externalization of the driving board to optimize the heat dissipation and space layout of the robot joint, and ensuring the timing coordination of the signal interaction between the driving board and the joint side. The method comprises the following steps: the driving board runs based on a preset control period, and sends a synchronization signal to the acquisition board through a synchronization signal channel at the starting stage of each control period; the acquisition board performs a clock synchronization operation in response to receiving the synchronization signal, so as to calibrate the internal working timing of the acquisition board; the acquisition board collects joint sensor data after performing the clock synchronization operation, and sends the joint sensor data to the driving board through a data communication channel; and the driving board performs timing alignment processing on the joint sensor data based on the timing corresponding relationship between the sending time of the synchronization signal and the receiving time of the joint sensor data, and completes joint control calculation.

The application provides a test method of a power grid based on RTDS and energy storage signal interaction simulation system, comprising: running a real-time digital simulation system, and issuing a start-up instruction by a storage converter; a battery model real-time simulation machine in a hardware-in-the-loop test system charges according to the start-up instruction; the frequency of a power grid model in a real-time simulation host is adjusted to a trigger threshold of primary frequency modulation, and a discharge instruction is issued by the storage converter; the battery model real-time simulation machine outputs active power according to the discharge instruction, and discharges according to the discharge current, and the discharge process is fed back to the real-time digital simulation system through a battery management system. The application also provides a power grid based on RTDS and energy storage signal interaction simulation system. Through the real-time digital simulation system, the storage converter, the hardware-in-the-loop test system and the battery management system, synchronous simulation of the power grid-energy storage is performed, and a real application scenario of charging, discharging, start-up and shutdown real-time adjustment of the energy storage container during grid connection is simulated.

The invention relates to the field of vehicle control, in particular to a vehicle window control method and device, equipment and a medium. Existing signals of the safety airbag controller and the emergency call module are integrated to serve as a triggering basis, new signals do not need to be additionally developed for linkage of multiple controllers, and starting judgment of emergency disposal is directly achieved through an original signal link of the vehicle. According to the method, a collision explosion indication signal and an emergency calling activation signal are taken as core triggering conditions, and detection logic of emergency disposal conditions is combined, so that the signal interaction requirement among multiple controllers is simplified, the cost of hardware adaptation, protocol debugging and the like caused by signal development is reduced, the emergency response reliability is guaranteed, and meanwhile, the system reliability is improved. Extra signal development cost investment is avoided, and the problem that cost is increased due to the fact that signals need to be developed additionally in multi-controller linkage in the prior art is effectively solved.

This disclosure relates to the field of wireless communication technology, and in particular to a mobility handover method, apparatus, electronic device, and computer program product. The method includes: sending a first message to a terminal device, wherein the first message instructs the terminal device to perform a state or function transition, the terminal device being in an energy-saving state or having an energy-saving function enabled. This disclosure proposes to perform state transitions in advance for terminal devices in an energy-saving state or with energy-saving functions enabled, thereby reducing transmission performance losses due to mobility; and to provide advance configuration for the terminal device, enabling the terminal device to remain in and / or switch to an energy-saving state, achieving mobility handover between the terminal device and / or the network under deep energy-saving conditions through low-power signal interaction.

The invention provides a communication transmission system and method for a DSP (Digital Signal Processor) and an FPGA (Field Programmable Gate Array), which relates to the field of communication transmission and comprises an I / O (Input / Output) control module, an internal DMA (Direct Memory Access) module and a data interleaving module, a GPIO multiplexing interface layer is arranged on the I / O control module; the GPIO multiplexing interface layer is in data and handshake signal interaction connection with an external FPGA (Field Programmable Gate Array); the output end of the transmission time and control module is in communication connection with the control multiplexer; the output end of the control multiplexer is respectively connected with the internal DMA module and the data interleaving module; the internal DMA module and the data interleaving module are connected through the I-FIFO module and the Q-FIFO module; and the data interleaving module is in data communication connection with the I / O control module. According to the invention, the CPU occupancy rate is obviously reduced, data preparation and transmission parallelization are realized, a hardware flow control and interruption mechanism is improved, the transmission reliability is guaranteed, the modular design is realized, and integration and expansion are easy.

The application relates to a cell infiltration inference method and system fusing GO function annotation and PPI network information, and the method comprises the following steps: collecting gene expression data, GO function annotation data and PPI network data; constructing a cell-cell function correlation network and a cell-cell physical interaction network respectively; performing weighted fusion processing on the two networks to obtain a comprehensive cell relationship network; calculating a final cell infiltration score through a restart walk algorithm, and inferring the infiltration degree in a tumor microenvironment according to the final cell infiltration score. The application innovatively fuses GO function annotation information and PPI network data, comprehensively considers the functional similarity and physical or signal interaction between cells, enables the model to understand cell synergy from the biological pathway level and analyze cell direct interaction from the protein interaction level, avoids one-sidedness of a single perspective, and provides a more stereoscopic cognitive framework for tumor microenvironment analysis.

The invention belongs to the technical field of water treatment, and provides a self-cleaning water treatment module and a purification technology.The self-cleaning water treatment module comprises an equipment shell, a multi-stage filter unit is arranged in the equipment shell, an electromagnetic coupling cleaning module is arranged on the periphery of a filter element of the filter unit, and the outer side of the equipment shell is connected with a bipolar circulation switching module; the electromagnetic coupling cleaning module is electrically connected with the control box, the bipolar circulation switching module is in signal interaction with the control box through a water pressure sensor, and a blow-off pipe is arranged at the bottom of the filter unit; according to the water purifier, reversible switching of the water flow direction is achieved through the bipolar circulation switching module, disassembly-free cleaning is conducted on the filter element in cooperation with the electromagnetic coupling cleaning module, the problems of pollutant accumulation, too fast scaling and filter material overpressure damage are solved, the filter element replacement period is prolonged, and the maintenance cost is reduced.

The invention relates to a cell infiltration inference method and system fusing GO function annotation and PPI network information. The method comprises the following steps: collecting gene expression data, GO function annotation data and PPI network data; respectively constructing a cell * cell function association network and a cell * cell physical interaction network; carrying out weighted fusion processing on the two to obtain a comprehensive cell relation network; and calculating a final cell infiltration fraction through a restart migration algorithm, and deducing the infiltration degree in the tumor microenvironment according to the final cell infiltration fraction. According to the method, GO function annotation information and PPI network data are creatively fused, functional similarity and physical or signal interaction between cells are comprehensively considered, the model can understand cell synergy from the biological pathway level and can analyze cell direct interaction from the protein interaction level, one-sidedness of a single view angle is avoided, and the method has the advantages of being simple in structure and convenient to operate. And a more three-dimensional cognitive framework is provided for tumor microenvironment analysis.

The invention relates to the technical field of line control systems, and provides a general transport vehicle body electric appliance line control system. Comprising a central control unit, a state monitoring unit, an intelligent diagnosis unit, a configurable topology unit, a communication interface unit, a load management unit, a safety protection unit, a man-machine interaction unit, a data storage unit and a self-learning optimization unit which are electrically connected with one another. And the central control unit is in signal interaction with other units and is used for realizing system general control scheduling and centralized data processing. By means of high-precision monitoring, high-accuracy fault diagnosis and three-level safety protection, modular design is matched, and the operation stability and the maintenance efficiency are greatly improved; through multi-topology mode adaptation, dynamic load distribution and self-learning optimization, energy consumption and line loss are remarkably reduced, meanwhile, scene adaptability is enhanced, and efficient and reliable operation of transport vehicle electric appliance lines is guaranteed in an omnibearing mode.

The invention provides an emergency evacuation method for an electromagnetic compatibility test of a power battery, and the method comprises an environment monitoring module, a water tank emergency protection module, a box moving robot system module, a test wire harness cut-off module, a test room control module, a control box module, and an electromagnetic compatibility test equipment protection module. And all the modules realize safety protection in an emergency scene through signal interaction and action linkage. Through cooperation of multiple modules, the single-dimension limitation of traditional protection is broken through, personnel-equipment-environment triple guarantee is constructed, a full-chain safety closed loop is formed, a full-automatic emergency evacuation process is achieved, manual intervention is not needed from emergency situation detection to transfer of a power battery to a safety area, and the evacuation efficiency and safety are improved.

This invention provides a method and system for implementing a simulation interaction process between a PLC and an MES in the MES field. The method includes: S1: defining trigger signals and writing a business scenario signal interaction flowchart; S2: writing trigger signal scripts to implement business processing feedback logic; S3: configuring a signal generator; S4: configuring multiple workstations and specifying the line-start workstation as the entry point for the program; S5: importing the trigger script and generator configuration into the main program and starting the program; S6: debugging and verifying the PLC or MES program through process-driven execution, completing the debugging from a single workstation to the entire line of workstations. This invention achieves MES and PLC interaction process simulation through signal-triggered simulation. Whether it's the MES or PLC, process simulation is implemented during the development and design phase, correcting obvious errors in the design phase, advancing the debugging process, shortening the implementation cycle, and reducing economic costs.

The invention discloses a conveying line which comprises at least one upstream conveying section, an intersection line body and at least one downstream conveying section. The intersection line body is used for scheduling the feeding request signal, determining an upstream conveying section allowing feeding at present, and returning a feeding allowing signal to the upstream conveying section; and a corresponding target downstream conveying section is determined according to the destination signal, a discharging request signal is sent to the target downstream conveying section, and the materials are conveyed into the target downstream conveying section after a discharging allowing signal is received. A conveying line is divided into three functional modules, namely an upstream conveying section, an intersection line body and a downstream conveying section, and a unified feeding request, feeding permission, destination, discharging request and discharging permission signal interaction mechanism is defined, so that the intersection line body can independently complete feeding scheduling and material routing decision, decoupling of control logic and physical topology is realized, and the control efficiency is improved. The standardization degree of the control program and the multiplexing capability under different layouts are obviously improved, and the development, debugging and maintenance processes are effectively simplified.

The invention relates to the technical field of wireless communication, in particular to a high-throughput narrowband trunking communication system and method and electronic device.According to the high-throughput narrowband trunking communication system and method, by introducing a normal connection design, a terminal permanently resides on a special service time slot distributed by a base station after initial registration of a control channel is completed, and when data needs to be sent, the terminal can be effectively protected; a tedious'application-response-switching 'link establishment process is not needed, and direct transmission can be realized only by detecting the idle state of the own service time slot. The fundamental change eliminates the main overhead caused by signaling interaction, thereby greatly improving the throughput rate of the system, remarkably reducing the transmission delay, and reducing the waste of air interface resources to the greatest extent.

This invention belongs to the field of space laser communication and deep space exploration technology, and discloses an integrated detection device for space laser communication monitoring and interaction. The device includes a main body, on which are integrated a solar panel, a navigation imaging device, a communication antenna, a communication receiver, a radar, a landing support, and functional components for communication monitoring, environmental perception, and interactive operation. This invention forms a closed-loop system through electrical, signal, and mechanical connections, enabling simultaneous execution of multiple tasks, significantly improving the device's space operation efficiency, reducing the load pressure on space launch vehicles, and adapting to the space constraints of on-orbit operations. The communication antenna and receiver achieve bidirectional signal interaction through a high-speed laser communication module and are linked with the navigation imaging device and environmental sensors to ensure stable transmission and status monitoring of laser communication signals, which is beneficial for practical applications and operations.

The invention discloses a feedback monitoring voting method suitable for a four-redundancy servo system, and the method comprises the steps: 1, setting a monitoring voting surface position, enabling a DSP to obtain an FPGA rocket command signal and other data, and writing the signals into an FPGA dual-port RAM; step 2, fault isolation counting and redundancy reconstruction are carried out in the DSP, and channels with obvious faults are prevented from continuously participating in system voting; 3, monitoring the four paths of feedback signals in the DSP; 4, executing a corresponding voting algorithm according to monitoring results of the four paths of signals; 5, performing closed-loop operation according to the voted servo mechanism position feedback, and outputting a PWM control signal; and step 6, performing deviation signal interaction on the control instruction and voted feedback, updating a fault status word according to a voting result of a deviation signal, and transmitting the fault status word to the FPGA. According to the four-redundancy servo system, the redundancy design that the performance of the four-redundancy servo system is not affected when two paths of signals fail can be ensured, and the flight reliability of a carrier rocket is improved.

The application provides a communication method and device, in which a terminal device sends context information stored by the terminal device to a network device (an access network device and / or a core network element). In this way, the network device before handover does not need to send the context information of the terminal device to the network device after handover, and the signaling overhead between the network devices can be saved; or the access network device and the core network element do not need to perform signaling interaction to create the context of the terminal device, and the signaling overhead between the access network device and the core network element can be saved.