CN109392050B - Method and equipment for acquiring identification information of tracking area of target serving cell - Google Patents

Abstract

A method and device for acquiring identification information of a tracking area of a target serving cell are used to reduce the power consumption of a terminal device. One of the methods for obtaining the tracking area identifier TAI of a target serving cell for cell reselection includes: a terminal device obtains a synchronization frame sent by a network device that receives a target serving cell through a wake-up radio WUR interface, wherein the synchronization frame includes the target serving cell. The identification information of the TA to which the serving cell belongs, and the target serving cell is the serving cell where the terminal device is located after performing cell reselection; the terminal device obtains the identification information of the TA to which the target serving cell belongs from the synchronization frame; The terminal device determines whether TA update needs to be performed according to the identification information of the TA to which the target serving cell belongs, and keeps the main communication interface of the terminal device in a closed state when not required.

Description

A method and device for obtaining identification information of a tracking area of a target serving cell

This application claims the priority of the Chinese patent application filed on August 10, 2017 with the application number 201710682675.2 and titled "Data Transmission Method and Apparatus", the entire contents of which are incorporated herein by reference.

technical field

The present application relates to the field of communication technologies, and in particular, to a method and device for acquiring identification information of a tracking area of a target serving cell.

Background technique

In a traditional mobile communication system, such as a Long Term Evolution (LTE) system, when a terminal device in an idle (IDLE) state needs to perform cell reselection during the moving process, it will affect the current serving cell and other neighboring serving cells. The cell reference signal is measured, and based on the measurement result, it is determined whether to initiate a cell reselection procedure.

After the terminal device determines the target serving cell from other adjacent serving cells, that is, after the completion of cell reselection, the terminal device will receive the system message block 1 (System Information Block1, SIB1) of the target serving cell through the main communication interface, and from the SIB1 Acquire the Tracking Area Identity (TAI) of the target serving cell, so as to determine whether to update the Tracking Area (TAI) according to the TAI of the target serving cell.

Based on the above description of the cell reselection process, after the cell reselection occurs during the moving process, the terminal device also needs to receive the system message block 1 of the target serving cell through the main communication interface to obtain the TAI of the target serving cell and determine whether it needs TA update is performed, and the system message block 1 of the target serving cell is received through the main communication interface. A relatively complex modulation and channel coding method has been adopted on the network device side, such as orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplexing, OFDM) modulation, Turbo , Low Density Parity Check (LDPC) or Polar and other channel coding methods, so that after the terminal device receives the system message block 1, it needs to perform Fast Fourier Transform (Fast Fourier Transform, FFT), forward error correction Code (Forward Error Correction, FEC) and other complex signal processing operations, and when the terminal device does not need to perform TA update, it takes a lot of energy to obtain the TAI of the target serving cell through these complex signal processing operations, which increases the power consumption of the terminal device.

SUMMARY OF THE INVENTION

Embodiments of the present application provide a method and device for acquiring identification information of a tracking area of a target serving cell, which are used to reduce power consumption of a terminal device.

In a first aspect, an embodiment of the present application provides a method for acquiring identification information of a tracking area TA of a cell reselection target serving cell, the method includes: a network device generates a synchronization frame, and the synchronization frame includes the location where the network device is located. Identification information of the tracking area TA to which the cell belongs; the network device sends the synchronization frame; after the terminal device reselection to the target serving cell, obtains the synchronization frame sent by the network device of the target serving cell received through the wake-up radio WUR interface ; The terminal device obtains the identification information of the TA to which the target serving cell belongs from the synchronization frame, and the terminal device determines whether the TA needs to be updated according to the identification information of the TA to which the target serving cell belongs, and when not required, Keep the main communication interface of the terminal device in a closed state. The solution provided by the embodiment of the present application avoids the situation where the terminal device does not need to update the TA when the terminal device receives the system message through the main communication interface to obtain the TAI of the TA to which the target serving cell belongs, and the main communication interface of the terminal device is in the closed state, that is, Avoid complex signal processing operations such as Fast Fourier Transform (FFT) and Forward Error Correction (FEC) on signals received through the main communication interface, thereby reducing the power consumption of terminal equipment .

In a possible design, the network device sends the synchronization frame according to a preset period. The preset period can be configured by the network device or specified by a standard protocol.

In a possible design, the synchronization frame further includes duration information of the preset period. In this way, when the WUR interface of the terminal device is activated at a certain time interval, the terminal device can predict the arrival time of the subsequent synchronization frames after receiving the first synchronization frame of the target serving cell, and then can accurately adjust the time when the WUR interface is in the active state. As well as the duration of the active state, the power consumption of the terminal device can be reduced while the subsequent synchronization frames of the target serving cell can be accurately received.

In a possible design, the synchronization frame further includes cell identification information of the cell where the network device is located. After the terminal device is reselected to a target serving cell, the identification information of the target serving cell can be acquired without performing complex parsing operations on the received synchronization frame, thereby reducing the power consumption of the terminal device. The cell identity information may be a physical-layer cell identity (Physical-lay Cell Identity, PCI), or part of the information in the PCI, or indication information used to indicate the PCI. After the terminal device obtains the indication information, it can The corresponding relationship between the indication information and the PCI determines the PCI indicated by the indication information.

In a possible design, the terminal device may receive, through the WUR interface, a synchronization frame sent by each of the N network devices of the N candidate serving cells, respectively, and then respectively send the first synchronization frame sent by each network device. The synchronization frame is measured to obtain N measurement results; according to the N measurement results, a target serving cell is determined from the N candidate serving cells, and the target serving cell is recorded as the current serving cell. With the solutions provided by the embodiments of the present application, when the terminal device reselection to a target serving cell among the N candidate serving cells, the terminal device can directly obtain the TA to which the target serving cell belongs from the synchronization frame sent by the network device of the target serving cell Then the TAI of the TA to which the target serving cell belongs is determined according to the identification information of the TA to which the target serving cell belongs, eliminating the need for the terminal device to receive the system message of the target serving cell through the main communication interface after cell reselection. The step of performing complex parsing of the message can further reduce the power consumption of the terminal device. Of course, the terminal device can also determine the target serving cell according to other methods, such as measuring the reference signals of the N serving cells where the N network devices are located, and performing cell reselection according to the obtained measurement results. Receive the synchronization frame sent by the network device of the target serving cell.

In a possible design, the WUR interface corresponds to a wake-up window determined by the terminal device in the source serving cell of the source network device, and the wake-up window is a time window during which the WUR interface is in an active state. The window duration of the window is the first window duration; the terminal device receives, through the WUR interface, a synchronization frame sent by each of the N network devices within the first window duration; or the terminal During the first duration when the WUR interface is in the active state, the device receives, through the WUR interface, the first synchronization frame respectively sent by each of the N network devices, and determines the target service after determining the target service. After the cell, according to the moment when the network device receiving the target serving cell sends the first synchronization frame, adjust the duration that the WUR interface is in the active state to a second duration, and pass the WUR interface within the second duration Receive a subsequent synchronization frame sent by a network device of the target serving cell, wherein the first duration is greater than the first window duration, and the second duration is shorter than the first duration; or the terminal device is in the During the third time period when the WUR interface is in the active state, receive the first synchronization frame sent by each of the N network devices through the WUR interface; and after determining the target serving cell, according to The time of receiving the first synchronization frame sent by the network device of the target serving cell or according to the time of receiving the first synchronization frame sent by the network device of the target serving cell and the second synchronization frame sent by the network device of the target serving cell. At the moment of the synchronization frame, adjust the duration that the WUR interface is in the active state to be a fourth duration, and receive subsequent synchronization frames sent by the network device of the target serving cell through the WUR interface within the fourth duration, wherein , the third duration is longer than the first window duration, and the fourth duration is shorter than the third duration; or the terminal device passes the The WUR interface receives the first synchronization frame sent by each of the N network devices respectively; and after determining the target serving cell, according to the first synchronization frame sent by the network device receiving the target serving cell time, and the period at which the network device of the target serving cell included in the first synchronization frame sends the synchronization frame, adjust the duration that the WUR interface is in the active state to be a sixth duration, within the sixth duration The subsequent synchronization frame sent by the network device of the target serving cell is received through the WUR interface, wherein the fifth duration is longer than the first window duration, and the sixth duration is shorter than the fifth duration.

In this embodiment of the present application, the cycle of the synchronization frame sent by each of the N network devices of the N candidate serving cells may be the same as or different from the cycle of the synchronization frame sent by the source network device, and the N network devices The start time of the synchronization frame sent by each network device in the network device may be the same as the start time of the synchronization frame sent by the source network device, or it may be different, for example, the period of each network device in the N network devices respectively sending the synchronization frame It is the same as the period at which the source network device sends synchronization frames, and the interval between the start times is less than the first window duration; or, the period at which each of the N network devices sends synchronization frames is the same as the period at which the source network device sends synchronization frames. Similarly, the interval between the start time when at least one of the N network devices sends the synchronization frame and the start time when the source network device sends the synchronization frame is greater than the first window duration of the terminal device; or, at least one of the N network devices The period at which a network device sends synchronization frames is different from the period at which the source network device sends synchronization frames. There are other situations, which are not listed here.

In this embodiment of the present application, the WUR interface of the terminal device may be continuously active. In this case, no matter how the N network devices send synchronization frames, the terminal device can pass the WUR interface within the first window duration. When the WUR interface of the terminal device is activated at a certain time interval, the terminal device needs to use different receiving modes to receive for different transmission modes of the N network devices.

For example, the period of each of the N network devices sending synchronization frames is the same as the period of the source network device sending synchronization frames, and the interval between the start times is less than the first window duration. The WUR interface can receive the synchronization frame sent by each of the N network devices respectively.

The period in which each network device in the N network devices sends the synchronization frame is the same as the period in which the source network device sends the synchronization frame. At least one network device in the N network devices sends the synchronization frame at the same time as the source network device sends the synchronization frame. The interval between the start times of the N network devices is greater than the first window duration, and the terminal device may not be able to receive the synchronization frame sent by each of the N network devices within the first window duration. At this time, the terminal device can control the WUR interface to be in the active state. The duration is the first duration, which is longer than the first window duration, so as to receive the first synchronization frame sent by each of the N network devices through the WUR interface within the first duration, and determine from the N candidate serving cells. After the target serving cell, according to the moment of receiving the first synchronization frame sent by the network device of the target serving cell, adjust the starting moment when the WUR interface is in the active state and the duration of the active state to be the second duration, and pass the WUR interface within the second duration. Receive subsequent synchronization frames sent by the network device of the target serving cell. Since the WUR window is only activated at the arrival time of the subsequent synchronization frame, and the second duration in which the WUR window is in the active state is shorter than the first duration, the technical solutions provided by the embodiments of the present application can accurately receive the target serving cell. while reducing the power consumption of the terminal equipment.

At least one network device among the N network devices sends a synchronization frame at a different period from the source network device. The terminal device may not be able to receive the synchronization frame sent by each of the N network devices within the first window duration. At this time, the terminal device can control the duration that the WUR interface is in the active state to be the third duration, which is greater than the duration of the first window, so as to receive the first synchronization message sent by each of the N network devices through the WUR interface within the third duration. frame, and after determining the target serving cell from the N candidate serving cells, according to the moment of receiving the first synchronization frame sent by the network device of the target serving cell or according to the time of receiving the first synchronization frame and the second synchronization frame of the target serving cell time, adjust the start time when the WUR interface is in the active state and the duration of the active state to be the fourth duration, and receive subsequent synchronization frames sent by the network device of the target serving cell through the WUR interface within the fourth duration. In this manner, if the synchronization frame sent by each of the N network devices further includes the periodic information of the synchronization frame sent by the network device, the terminal device can send the first synchronization frame according to the network device receiving the target serving cell. , dynamically adjust the start time when the WUR interface is in the active state and the duration of the active state, and reduce the power consumption of the terminal device while ensuring that the network device that can accurately receive the target serving cell sends subsequent synchronization frames.

In a possible design, the terminal device determines whether the TAI indicated by the identification information of the TA to which the target serving cell belongs is in the TA list stored by the terminal device. The TAI is in the TA list, and the terminal device can keep the main communication interface in a closed state. In this way, only when the TAI indicated by the identification information of the TA to which the target serving cell belongs is not in the TA list, the terminal device activates the main communication interface to perform TA update with the network device through the main communication interface, and when the target serving cell belongs to the TA of the TA When the TAI indicated by the identification information is in the TA list, the terminal device can keep the main communication interface in a closed state, so as to reduce the power consumption of the terminal device.

In a second aspect, an embodiment of the present application provides a terminal device, where the terminal device has a function of implementing the behavior of the terminal device in the method of the first aspect. The functions can be implemented by hardware, or can be implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions.

In a possible design, the structure of the terminal device includes a wake-up radio WUR interface and a processor, where the processor is configured to support the terminal device to perform the corresponding functions in the method of the first aspect. The WUR interface is used to support the communication between the terminal device and the network device, and to receive the information or instructions involved in the method of the first aspect. The terminal device may also include a memory coupled to the processor that holds the necessary program instructions and data. The terminal device may further include a main communication interface for supporting communication between the terminal device and the network device.

In a third aspect, an embodiment of the present application provides a network device, where the network device has a function of implementing the behavior of the network device in the method of the first aspect. The functions can be implemented by hardware, and the structure of the network device includes a processor and a transmitter. The corresponding software implementation can also be executed by hardware. The hardware or software includes one or more modules corresponding to the above functions. The modules may be software and/or hardware.

In a fourth aspect, an embodiment of the present application provides a communication system, where the system includes the terminal device described in the second aspect and the network device described in the third aspect.

In a fifth aspect, an embodiment of the present application provides a computer storage medium, which stores computer software instructions for executing the functions designed in the first aspect and the first aspect, or contains computer software instructions for executing the first aspect. . A program involved in any one of the designed methods of the first aspect.

In a sixth aspect, an embodiment of the present application provides a computer program product, which, when invoked and executed by a computer, can cause the computer to execute the first aspect and any of the methods designed in the first aspect.

In a seventh aspect, an embodiment of the present application provides a chip system, where the chip system includes a processor for supporting a terminal device or a network device to implement the method described in the first aspect, for example, generating or processing the method in the first aspect. the data and/or information involved. In a possible design, the chip system further includes a memory, and the memory is used for storing necessary program instructions and data of the terminal device or network device, and the processor in the chip system can call the program stored in the memory in the chip system Instructions and data, so that the chip system can realize the above-mentioned terminal equipment or network equipment can realize the function. The chip system may be composed of chips, or may include chips and other discrete devices.

In an eighth aspect, an embodiment of the present application provides a data transmission method, the method is applied to a network device and at least one terminal device, the network device includes a first interface and a second interface, the terminal device includes a third interface and a fourth interface, where the first interface and the third interface communicate through a first communication mode, and the second interface and the fourth interface communicate through a second communication mode;

The method includes:

The network device generates a synchronization frame, and the synchronization frame includes the TA identification information of the tracking area TA to which the network device belongs;

The network device sends the synchronization frame to the third interface of the at least one terminal device through the first interface, so that each terminal device in the at least one terminal device determines whether to The fourth interface is activated to perform a TA update procedure with the second interface of the network device through the fourth interface.

The first communication mode may be communication between WUR interfaces, and because the synchronization frame is communicated through the first communication mode, the synchronization frame may be referred to as a WUR synchronization frame. The second communication method may be communication between primary communication interfaces.

When the network device sends the synchronization frame to the third interface of the at least one terminal device (eg, user equipment UE) through the first interface, the third interface is in an active state, and the third interface is in an active state. The quad interface is in a closed state (eg sleep state).

The WUR synchronization frame carries the TA identification information, so that the IDLE state UE can determine whether to perform the TA update process without activating the main communication interface to monitor the system message (SIB1) of the new serving cell after completing the cell reselection, thereby saving more power.

In a possible design, the synchronization frame further includes cell identification information of the cell to which the network device belongs.

The cell identification information is carried in the WUR synchronization frame, so that the IDLE state UE does not need to activate the main communication interface to monitor the system messages (MIB) of other cells to obtain the cell identification during cell reselection, so that the UE receives low power consumption.

In a possible design, the synchronization frame is sent periodically, and the synchronization frame further includes a transmission period of the synchronization frame.

In the case where the WUR synchronization frame period of different cells may be different, carrying the transmission period of the synchronization frame in the WUR synchronization frame enables the UE to infer the transmission time of all subsequent synchronization frames by only receiving one synchronization frame of the new serving cell.

In a possible design, the first interface and the third interface are wake-up radio frequency interfaces, and the second interface and the fourth interface are main communication interfaces.

Since the third interface is the WUR interface and the fourth interface is the main communication interface, it is beneficial for the UE to save power that the fourth interface is in a closed state and the third interface is in an active state.

In a ninth aspect, an embodiment of the present application provides a data transmission method, the method is applied to a network device and at least one terminal device, the network device includes a first interface and a second interface, the terminal device includes a third interface and a fourth interface, where the first interface and the third interface communicate through a first communication mode, and the second interface and the fourth interface communicate through a second communication mode;

The method includes:

The terminal device receives, through the third interface, a synchronization frame sent by the network device through the first interface, where the synchronization frame includes the TA identification information of the tracking area TA to which the network device belongs;

The terminal device determines whether the fourth interface needs to be activated according to the TA identification information, so as to perform a TA update process through the fourth interface and the second interface of the network device.

The WUR synchronization frame carries the TA identification information, so that the IDLE state UE can determine whether to perform the TA update process without activating the main communication interface to monitor the system message (SIB1) of the new serving cell after completing the cell reselection, thereby saving more power.

In a possible design, the terminal device determines whether the fourth interface needs to be activated according to the TA identification information, so as to perform a TA update process through the fourth interface and the second interface of the network device, including:

When the TA indicated by the TA identification information is not included in the TA list saved by the terminal device, the terminal device activates the fourth interface, and communicates with the second interface of the network device through the fourth interface. The interface performs the TA update process.

The UE moves out of the TA List range configured for itself by the network side, so it needs to open the main communication interface to perform the TA update process.

In a possible design, the terminal device determines whether the fourth interface needs to be activated according to the TA identification information, so as to perform a TA update process through the fourth interface and the second interface of the network device, including:

When the TA indicated by the TA identification information is included in the TA list saved by the terminal device, the terminal device does not activate the fourth interface.

The UE does not move out of the TA List range configured for itself by the network side, and does not need to update the TA List. Since the determination is made by listening to the synchronization frame on the third interface (WUR interface), rather than by listening to system messages on the fourth interface (main communication interface), this process is more power-efficient than the traditional method.

In a possible design, the synchronization frame further includes cell identification information of the cell to which the network device belongs.

The cell identification information is carried in the WUR synchronization frame, so that the IDLE state UE does not need to activate the main communication interface to monitor the system messages (MIB) of other cells to obtain the cell identification during cell reselection, so that the UE receives low power consumption.

In a possible design, the synchronization frame is sent periodically, and the synchronization frame further includes a transmission period of the synchronization frame.

In the case where the WUR synchronization frame period of different cells may be different, carrying the transmission period of the synchronization frame in the WUR synchronization frame enables the UE to infer the transmission time of all subsequent synchronization frames by only receiving one synchronization frame of the new serving cell.

In a possible design, the first interface and the third interface are wake-up radio frequency interfaces, and the second interface and the fourth interface are main communication interfaces.

Since the third interface is a wake-up radio interface (WUR interface) and the fourth interface is the main communication interface, it is beneficial for the UE to save power when the fourth interface is turned off and the third interface is activated.

In a tenth aspect, an embodiment of the present application provides a network device, where the network device includes:

processors, memories and transceivers;

the transceiver for receiving and transmitting data;

the memory for storing instructions;

The processor is configured to execute the instructions in the memory, and execute the method according to any one of the eighth aspect and the eighth aspect.

In a possible design, the transceiver is a main communication module, configured to send the synchronization frame designed according to any one of the eighth aspect and the eighth aspect.

The primary communication module may be an LTE/NR module. The synchronization frame may be a synchronization frame that can be recognized by the WUR interface, and may also be referred to as a WUR synchronization frame.

In a possible design, the network device further includes a transmitter, and the transmitter is configured to send the synchronization frame designed according to any one of the eighth aspect and the eighth aspect.

The transmitter may be a WUR module (also referred to as a WUR interface) with a function of transmitting signals. The synchronization frame may be a synchronization frame that can be recognized by the WUR interface, and may also be referred to as a WUR synchronization frame.

In an eleventh aspect, an embodiment of the present application provides a terminal device, where the terminal device includes:

processors, memories, transceivers and receivers;

the transceiver for receiving and transmitting data;

the memory is used to store instructions;

The processor is configured to execute the instructions in the memory, and execute the method according to any one of the ninth aspect and the ninth aspect.

In a possible design, the receiver is configured to receive the synchronization frame designed according to any one of the ninth aspect and the ninth aspect.

The receiver may be a WUR, also known as a WUR module (also known as a WUR interface). The synchronization frame may be a synchronization frame that can be recognized by the WUR interface, and may also be referred to as a WUR synchronization frame.

A twelfth aspect, an embodiment of the present application provides a computer program product, including a computer program, when the computer program is executed on a computer unit, the computer unit will implement any one of the eighth aspect and the eighth aspect. a design method.

In a thirteenth aspect, an embodiment of the present application provides a computer program product, including a computer program, when the computer program is executed on a computer unit, the computer unit will implement any one of the ninth aspect and the ninth aspect. a design method.

In a fourteenth aspect, an embodiment of the present application provides a computer program, which, when executed on a computer unit, enables the computer unit to implement any one of the eighth aspect and the design method of the eighth aspect.

In a fifteenth aspect, an embodiment of the present application provides a computer program, which, when executed on a computer unit, enables the computer unit to implement any one of the design methods of the ninth aspect and the ninth aspect.

In a sixteenth aspect, an embodiment of the present application provides a network device, where the network device is configured to perform the method according to any one of the eighth aspect and the eighth aspect.

In a seventeenth aspect, an embodiment of the present application provides a terminal device, where the terminal device is configured to execute the method according to any one of the ninth aspect and the ninth aspect.

In the embodiment of the present application, after the terminal device reselection to a target serving cell, the terminal device obtains the identification information of the TA to which the target serving cell belongs from the synchronization frame received by the network device of the target serving cell through the WUR interface, and then according to The identification information of the TA to which the target serving cell belongs determines the TAI of the TA to which the target serving cell belongs, and determines whether to update the TA according to the TAI of the TA to which the target serving cell belongs. The identification information of the TA to which the target serving cell belongs is used to determine whether TA update is required, and when not required, the main communication interface of the terminal device is kept in a closed state. The solution provided by the embodiment of the present application avoids the situation where the terminal device does not need to update the TA when the terminal device receives the system message through the main communication interface to obtain the TAI of the TA to which the target serving cell belongs, and the main communication interface of the terminal device is in the closed state, that is, Complex signal processing operations such as Fast Fourier Transform (FFT) and Forward Error Correction (FEC) are avoided on the signal received through the main communication interface, thereby reducing the power consumption of the terminal device.

Description of drawings

1 is a schematic diagram of an application scenario provided by an embodiment of the present application;

FIG. 2 is a schematic structural diagram of a terminal device and a network device according to an embodiment of the present application;

3 is a schematic diagram of a wake-up window of a WUR interface of a terminal device according to an embodiment of the present application;

4 is a flowchart of a method for acquiring a tracking area identifier TAI of a cell reselection target serving cell provided by an embodiment of the present application;

5A-5C are schematic diagrams of respectively sending synchronization frames by network devices according to an embodiment of the present application;

FIG. 6 is a flowchart of TA update provided by an embodiment of the present application;

7 is a flowchart of another method for obtaining a tracking area identifier TAI of a cell reselection target serving cell provided by an embodiment of the present application;

FIG. 8 is a schematic structural diagram of another terminal device provided by an embodiment of the present application;

FIG. 9 is a schematic structural diagram of another network device provided by an embodiment of the present application;

FIG. 10 is a schematic structural diagram of another terminal device provided by an embodiment of the present application;

FIG. 11 is a schematic structural diagram of another network device provided by an embodiment of the application;

FIG. 12 is a schematic diagram of an application scenario provided by an embodiment of the present application;

13 is a schematic diagram of a base station sending a synchronization frame according to an embodiment of the present application;

FIG. 14 is a schematic structural diagram of a base station according to an embodiment of the application;

FIG. 15 is a schematic structural diagram of a terminal device according to an embodiment of the application.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings.

The technical solutions described in the embodiments of this application can be applied to the fifth generation mobile communication technology (5G), and can also be applied to the next generation mobile communication system.

Hereinafter, some terms in the embodiments of the present application are explained so as to facilitate the understanding of those skilled in the art.

(1) A network device, including, for example, a base station (eg, an access point) may refer to a device in an access network that communicates with a wireless terminal device through one or more sectors on the air interface. The base station may be used to interconvert the received air frames and IP packets, acting as a router between the terminal equipment and the rest of the access network, which may include the IP network. The base station may also coordinate attribute management of the air interface. For example, the base station may include an evolved base station (NodeB or eNB or e-NodeB, evolutional Node B) in a Long Term Evolution (Long Term Evolution, LTE) system or an evolved LTE system (LTE-Advanced, LTE-A), or may also Including the next generation node B (next generation node B, gNB) in the 5G system, the embodiment of the present application is not limited.

(2) Terminal devices, including devices that provide voice and/or data connectivity to users, for example, may include handheld devices with wireless connectivity, or processing devices connected to wireless modems. The terminal equipment can communicate with the core network via a radio access network (Radio Access Network, RAN), and exchange voice and/or data with the RAN. The terminal equipment may include user equipment (User Equipment, UE), wireless terminal equipment, mobile terminal equipment, subscriber unit (Subscriber Unit), subscriber station (Subscriber Station), mobile station (Mobile Station), mobile station (Mobile), remote Station (Remote Station), Access Point (Access Point, AP), Remote Terminal (Remote Terminal), Access Terminal, User Terminal, User Agent, or User Equipment (User Device) and so on. For example, it may include mobile phones (or "cellular" phones), computers with mobile terminal equipment, portable, pocket-sized, hand-held, computer-built or vehicle-mounted mobile devices, smart wearable devices, and the like. For example, Personal Communication Service (PCS) phones, cordless phones, Session Initiation Protocol (SIP) phones, Wireless Local Loop (WLL) stations, Personal Digital Assistant (PDA), smart Watches, smart helmets, smart glasses, smart bracelets, and other devices. Also includes constrained devices, such as devices with lower power consumption, or devices with limited storage capacity, or devices with limited computing power, etc. For example, it includes information sensing devices such as barcodes, radio frequency identification (RFID), sensors, global positioning systems (GPS), and laser scanners.

(3) The terms "system" and "network" in the embodiments of the present application may be used interchangeably. "Plurality" refers to two or more than two, and in view of this, "plurality" may also be understood as "at least two" in the embodiments of the present application. "And/or", which describes the association relationship of the associated objects, means that there can be three kinds of relationships, for example, A and/or B, which can mean that A exists alone, A and B exist at the same time, and B exists alone. In addition, the character "/", unless otherwise specified, generally indicates that the related objects are an "or" relationship.

In the embodiment of the present application, after the terminal device reselection to a target serving cell, the terminal device obtains the identification information of the TA to which the target serving cell belongs from the synchronization frame received by the network device of the target serving cell through the WUR interface, and then according to The identification information of the TA to which the target serving cell belongs determines the TAI of the TA to which the target serving cell belongs. Since the signals received through the WUR interface use a relatively simple modulation method, the terminal equipment side does not need to perform fast Fourier transformation on the received synchronization frame. Transform (Fast Fourier Transform, FFT), forward error correction code (Forward Error Correction, FEC) and other complex signal processing operations, so as to reduce the power consumption of the terminal device.

Please refer to FIG. 1 , which is an application scenario of the embodiment of the present application. In FIG. 1 , there are multiple base stations and terminal devices located within the common coverage of the multiple base stations, and each of the multiple base stations generates a synchronization frame and broadcasts the respective generated synchronization frame.

The following describes the technical solutions provided by the embodiments of the present application with reference to the accompanying drawings. In the following introduction process, the technical solutions provided by the embodiments of the present application are applied to the application scenario shown in FIG. 1 as an example, and the network device is a base station. For example.

The embodiments of the present application provide a method and device for acquiring identification information of a tracking area TA of a cell reselection target serving cell, which are applicable to terminal devices and base stations. Figure 2 shows a possible structural diagram of a terminal device and a base station. The terminal device 20 shown in FIG. 2 includes a wake-up radio (Wake-up Radio, WUR) interface 201 , a main communication interface (MainRadio) 202 and other components. The base station 21 shown in FIG. 2 includes a main communication interface 211 . Those skilled in the art can understand that the structure of the terminal device 20 shown in FIG. 2 does not constitute a limitation on the terminal device 20, and the terminal device 20 provided in this embodiment of the present application may include more or less components than those shown in the drawings. Either some components are combined, or different component arrangements. Similarly, the structure of the base station 21 shown in FIG. 2 does not constitute a limitation on the base station 21, and the base station 21 provided in this embodiment of the present application may include more components than shown in the figure, or combine some components, or different components layout.

Below in conjunction with Fig. 2, each constituent component of the terminal device 20 and the base station 21 will be specifically introduced:

The WUR interface 201 is used to receive a wakeup signal sent by the base station 21, such as a wakeup packet or a wakeup frame. After the WUR interface 201 receives the wakeup signal, it sends a trigger signal to the main communication interface 202 to wake up to a closed state. main communication interface 202. The trigger signal, such as an interrupt signal, may be sent to the main communication interface 202 by the WUR interface 201 in a wired or wireless manner, or may be sent to the main communication interface 202 by the processor of the terminal device 20. For example, in an actual system, the WUR The interface 201 forwards the received wake-up signal to the processor, and the processor decides whether to activate the main communication interface 202. At this time, the trigger signal is sent by the processor to the main communication interface 202;

The main communication interface 202, such as a long term evolution (Long Term Evolution, LTE), a new radio (New Radio, NR), or a wireless fidelity (Wireless Fidelity, WiFi) interface, etc., the main communication interface 202 is usually in a closed state, only when receiving Only when the trigger signal sent by the WUR interface 201 or the processor of the terminal device 20 is received, it is in an active state to perform data interaction with the main communication interface 211 of the base station 21 .

In the embodiment of the present application, in order to achieve low power consumption, the circuit structure of the WUR interface 201 is relatively simple. For example, the circuit structure of the WUR interface 201 may include energy detection and radio frequency parts, and cannot demodulate complex modulation methods. Therefore, the wake-up signal also needs to be Simple modulation methods such as On-Off Keying (OOK) modulation, Amplitude Shift Keying (ASK) or Frequency Shift Keying (FSK) are used. The WUR interface 201 may be continuously activated, or may be activated at certain time intervals, so as to reduce the power consumption of the terminal device 20 . Wherein, when the WUR interface 201 is activated at a certain time interval, the terminal device 20 needs to perform time synchronization with the base station 21 . The time window in which the WUR interface 201 is in an active state may be called a wake-up window. The start time of the wake-up window, the duration of the wake-up window, and the period of the wake-up window may be pre-agreed by the base station 21 and the terminal device 20, or configured by the base station 21 to the terminal device. 20. Please refer to FIG. 3 , which is an example in which the period of the wake-up window of a WUR interface is 120 milliseconds (ms), and the duration of the wake-up window is 2 ms.

Continuing to refer to FIG. 2, the base station 21 includes a main communication interface 211, and the base station 21 can generate a wake-up signal by the main communication interface 211, because for the current ^3rd Generation Partnership Project (3GPP) standard, the base station 21 The main communication interface 211 is usually an orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplexing, OFDM) broadband transmitter, and the wake-up signal may be a narrowband signal. In order to reduce the manufacturing cost of the base station 21 and simplify the structure of the base station 21, OFDM broadband can be used The transmitter generates a narrowband wake-up signal. For example, part of the sub-carriers of the OFDM signal are vacated and the signal is only transmitted in the narrowband corresponding to the wake-up signal, thereby generating the narrowband signal. It should be noted that the base station 21 may also implement the main communication interface 211 and the WUR interface separately in specific implementation, that is, the base station 21 shown in FIG. 2 may also include the main communication interface 211 and the WUR interface at the same time.

In addition, both the base station 21 and the terminal device 20 shown in FIG. 2 are configured with one antenna. This is mainly because the WUR interface 201 and the main communication interface 202 of the terminal device 20 can share the same antenna when the same or close frequency band carrier is used. , so as to save the manufacturing cost of the terminal device 20 and simplify the device structure. Of course, when the WUR interface 201 and the main communication interface 202 of the terminal device 20 use different frequency band carriers with large intervals in the frequency domain, the WUR interface 201 and the main communication interface 202 of the terminal device 20 should be configured with different antennas. For example, the main communication interface 202 of the terminal device 20 uses the 6GHz frequency band, and the WUR interface 201 uses the 1.8GHz frequency band. At this time, the main communication interface 202 and the WUR interface 201 should be configured with different antennas. Wherein, when the main communication interface 211 and the WUR interface of the base station 21 are implemented separately, and the main communication interface 211 and the WUR interface use carriers of different frequency bands with larger intervals in the frequency domain, the main communication interface 211 and the WUR interface of the base station 21 should also be configured. different antennas.

In this embodiment of the present application, the cell reselection performed by the terminal device 20 may be triggered by periodic measurement, or may be triggered by an event. For example, when the terminal device 20 measures the reference signal or synchronization frame of the source serving cell and finds that the received power is less than a certain threshold, the terminal device 20 is triggered to perform cell reselection, that is, the N candidate serving cells (relative to the cell reselection) are triggered. The reference signal or synchronization frame of the neighboring serving cell) is measured and the target serving cell for cell reselection is determined, thereby completing the cell reselection. The specific criteria for the terminal device 20 to determine the target serving cell according to the measurement results of the N candidate serving cells can be determined by the terminal device 20. For example, the terminal device 20 selects the candidate serving cell with the highest received power as the target serving cell for cell reselection. When the measurement objects used by the terminal device 20 for cell reselection are different, the timing at which the terminal device 20 receives the synchronization frame sent by the base station 21 is also different. For reselection, after determining the target serving cell, the terminal device 20 receives the synchronization frame sent by the network device of the target serving cell; or the terminal device 20 performs cell reselection based on the synchronization frame sent by the N base stations 21 of the N candidate serving cells, Before performing cell reselection, the terminal device 20 receives, through the WUR interface, synchronization frames sent by each of the N base stations 21 of the N candidate serving cells, respectively, which will be described below.

Referring to FIG. 4 , an embodiment of the present application provides a method and device for acquiring identification information of a tracking area TA of a cell reselection target serving cell. The method is applicable to the terminal device 20 and base station 21 shown in FIG. 2 .

S41: The base station 21 generates a synchronization frame, and the synchronization frame includes the identification information of the tracking area TA to which the cell where the base station 21 belongs; in the embodiment of the present application, the TA is a communication system, such as a concept introduced by LTE to simplify the location management of the terminal device 20 , which represents a set of cells. Multiple cells are assigned to the same TA, that is, each TA includes at least one cell, and each cell can only belong to one TA.

In the embodiment of the present application, the identification information of the tracking area TA to which the cell where the base station 21 is located may be a tracking area identity (Tracking Area Identity, TAI), including a public land mobile network (Public Land Mobile Network, PLMN) and a tracking area code ( Tracking Area Code, TAC).

The identification information of the tracking area TA to which the cell where the base station 21 is located may also be part of the information included in the TAI, for example, the tracking area code (Tracking Area Code, TAC) included in the TAI. This is because the PLMN included in the TAI is used to identify the network service operator, and a frequency band in the same area is usually allocated to one operator, so the identification information of the tracking area TA to which the cell where the base station 21 belongs may not include the PLMN. When the identification information of the tracking area TA of the cell where the base station 21 is located is TAC, the length of the identification information of the tracking area TA to which the cell where the base station 21 is located is shortened, that is, the length of the synchronization frame is shortened. In a short time, the resources used by the base station 21 for sending the synchronization frame are also reduced, thereby reducing the resource overhead of the base station 21 . Then, in order to further reduce the resource overhead of the base station 21, the identification information of the tracking area TA to which the cell where the base station 21 belongs may also be a part of the TAC, for example, the lower bits of the TAC.

The identification information of the tracking area TA of the cell where the base station 21 is located may also be the indication information of the TAI of the TA to which the cell where the base station 21 is located belongs. For example, the indication information is a sequence, and different sequences represent different TAIs. As an example, 001 is used for To indicate TAI1, 010 is used to indicate TAI2, or 100 is used to indicate TAI3.

The identification information of the tracking area TA of the cell where the base station 21 belongs may also be the identification information generated by the base station 21 according to the TAI of the TA of the cell to which the base station 21 belongs. is a hash value to identify the TAI of the TA to which the cell where the base station 21 is located.

S42: The base station 21 sends a synchronization frame, and accordingly, the terminal device 20 receives the synchronization frame sent by each of the N base stations 21 of the N candidate serving cells through the wake-up radio WUR interface 201, where N is greater than or equal to 1 the integer. Here, the N base stations 21 of the N candidate serving cells are referred to as N candidate base stations 21, and the base station of the serving cell (ie the source serving cell) where the terminal device 20 is performing cell reselection is referred to as the source base station 21, the source The serving cell where the base station 21 is located is called the source serving cell; the serving cell where the terminal equipment is located after reselection is called the target serving cell, and the base station 21 of the target serving cell is called the target base station 21 . The terminal device 20 corresponds to a wake-up window. The wake-up window is determined by the terminal device 20 in the source serving cell where the source base station 21 is located. The wake-up window includes the start time of the wake-up window and the duration of the wake-up window. The duration of the wake-up window is the first The duration of a window.

In this embodiment of the present application, the manner in which the N candidate base stations 21 and the source base station 21 send the synchronization frame may be sent at a preset period. Taking any candidate base station 21 among the N candidate base stations 21 as an example, the preset period can be configured by any candidate base station 21. / System Information Block (Master/System Information Block, MIB/SIB), Media Access Control Element (Media Access Control Control Element, MAC CE) or physical downlink control channel configuration; or set of parameters configured by RRC signaling, by MAC CE or The physical layer signaling configures a parameter to the terminal device 20 from the parameter set configured by the RRC signaling; the preset period may also be specified by a standard protocol. In this embodiment of the present application, the source base station 21 or any candidate base station 21 sends configuration information to the terminal device 20, where the configuration information includes a preset period. For the terminal equipment 20 in the connected state, the base station can configure the preset period for the terminal equipment 20 through the above configuration information; and for the terminal equipment 20 in the idle state, the terminal equipment can use a standard predefined preset period, or use a saved preset period Period (before the terminal equipment is in the connected state, configured by the base station), or the terminal equipment 20 actively searches for synchronization frames, and determines the preset period according to one or more received synchronization frames.

In the embodiment of the present application, for the terminal device 20 in the connected state, the source base station 21 or any candidate base station 21 can configure the period for sending the synchronization frame in the base station configuration information in addition to configuring the period for sending the synchronization frame in the base station configuration information. The time and/or frequency resources used and the wake-up window length of the terminal device 20 . Of course, the above parameters can also be predefined by the standard. At the same time, the source base station 21 or any candidate base station 21 can also configure the start time of sending the synchronization frame in the base station configuration information, and the time when the source base station 21 or any candidate base station 21 sends the synchronization frame can be represented by a time offset, for example The time offset may be the time interval between the first synchronization frame and the base station configuration information. The source base station 21 or any candidate base station 21 may send the base station configuration information to the main communication interface 202 of the terminal device 20 through the main communication interface when the terminal device 20 is in the connected state.

The period in which each candidate base station 21 of the N candidate base stations 21 sends the synchronization frame may be the same as or different from the period in which the synchronization frame is sent by the source base station 21 of the terminal device 20; the start time of the synchronization frame sent by each candidate base station 21 The start time of sending the synchronization frame with the source base station 21 may be the same or different, which will be introduced separately below.

1. The cycle of the synchronization frame sent by each candidate base station 21 in the N candidate base stations 21 is the same as the cycle of the synchronization frame sent by the source base station 21. The start of the synchronization frame sent by each candidate base station 21 in the N candidate base stations 21 The interval between the time and the start time when the source base station 21 sends the synchronization frame is less than or equal to the preset value;

Referring to FIG. 5A , taking candidate base station 21(1) and source base station 21(2) as examples, the period at which the candidate base station 21(1) sends the synchronization frame 1 is the same as the period at which the source base station 21(2) sends the synchronization frame 2. The interval between the start time when the base station 21(1) sends the synchronization frame 1 and the start time when the source base station 21(2) sends the synchronization frame 2 is less than or equal to a preset value.

In this embodiment of the present application, when the period at which the candidate base station 21(1) sends the synchronization frame 1 is the same as the period at which the source base station 21(2) sends the synchronization frame, if the candidate base station 21(1) sends the synchronization frame 1 at the start time The same as the start time when the source base station 21(2) sends the synchronization frame 2, interference will occur between the synchronization frame 1 sent by the candidate base station 21(1) and the synchronization frame 2 sent by the source base station 21(2). In order to avoid interference, the candidate base station 21(1) and the source base station 21(2) can mutually agree on the time interval between sending the synchronization frame 1 and the synchronization frame 2 in advance. The interval between the start time and the start time when the source base station 21(2) sends the synchronization frame 2 is less than or equal to a preset value, and the preset value is the first window duration of the WUR interface 201 of the terminal device 20, such as shown in FIG. 3 . The duration of the wake-up window shown is 2ms.

2. The period of the synchronization frame sent by each candidate base station 21 of the N candidate base stations 21 is the same as that of the synchronization frame sent by the source base station 21, and the start time of the synchronization frame sent by at least one candidate base station 21 of the N candidate base stations 21 is the same as that of the source base station 21. The interval between the start times when the base station 21 sends the synchronization frame is greater than the preset value;

Referring to FIG. 5B , taking candidate base station 21(1) and source base station 21(2) in at least one candidate base station 21 as an example, the period in which the candidate base station 21(1) sends the synchronization frame 1 is the same as the source base station 21(2) sends the synchronization frame The period of the frame 2 is the same, and the interval between the start time when the candidate base station 21(1) sends the synchronization frame 1 and the start time when the source base station 21(2) sends the synchronization frame 2 is greater than the preset value, the preset value is the terminal The duration of the first window of the WUR interface 201 of the device 20 is, for example, the duration of the wake-up window shown in FIG. 3 is 2 ms.

3. The period of the synchronization frames respectively sent by at least one candidate base station 21 of the N candidate base stations 21 is different from the period of the synchronization frames sent by the source base station 21;

Referring to FIG. 5C, taking candidate base station 21(1) and source base station 21(2) in at least one candidate base station 21 as an example, the period in which the candidate base station 21(1) transmits the synchronization frame 1 and the source base station 21(2) transmits synchronization The period of frame 2 is different.

Based on the above description, the WUR interface 201 of the terminal device 20 may be in an active state continuously, or may be activated at a certain time interval. Wherein, when the WUR interface 201 of the terminal device 20 is continuously in the active state, no matter which transmission mode the N candidate base stations 21 send the synchronization frame respectively, the terminal device 20 can receive N through the WUR interface 201 within the first window duration. A synchronization frame sent by each candidate base station 21 among the candidate base stations 21 respectively. In the case where the WUR interface 201 of the terminal device 20 is activated at a certain time interval, when each candidate base station 21 of the N candidate base stations 21 adopts different transmission modes, the terminal device 20 needs to adopt different reception modes. Introduce.

1. For Mode 1, since the cycle of the synchronization frame sent by each candidate base station 21 in the N candidate base stations 21 is the same as the cycle of the synchronization frame sent by the source base station 21, the synchronization frame sent by each candidate base station 21 in the N candidate base stations 21 The interval between the start time of the synchronization frame and the start time of the synchronization frame sent by the source base station 21 is less than or equal to the first window duration. In this way, the terminal device 20 can receive N data through the WUR interface 201 within the first window duration. The synchronization frame sent by each candidate base station 21 in the candidate base stations 21 respectively. For example, within the first window duration, the terminal device 20 can always receive the synchronization frame sent by the candidate base station 21(1) through the WUR interface 201.

2. For Mode 2, since the interval between the start time of the synchronization frame sent by at least one candidate base station 21 among the N candidate base stations 21 and the start time of the synchronization frame sent by the source base station 21 is greater than the first window duration, the terminal During the first window duration, the device 20 may not be able to receive the synchronization frame sent by each candidate base station 21 of the N candidate base stations 21 through the WUR interface 201 . In this case, the terminal device 20 can control the duration that the WUR interface 201 is in the active state to be the first duration, which is greater than the first window duration, so as to receive the N candidate base stations 21 through the WUR interface 201 within the first duration. The first synchronization frame sent by each candidate base station 21, wherein the first synchronization frame sent by each candidate base station 21 in the N candidate base stations 21 may be the first synchronization frame sent by each candidate base station 21, each The first synchronization frame and the second synchronization frame respectively sent by the candidate base stations 21 are not specifically limited herein. In this embodiment of the present application, after the terminal device 20 receives the first synchronization frame sent by each candidate base station 21 of the N candidate base stations 21, it measures the first synchronization frame sent by each candidate base station 21, for example , respectively measure the first synchronization frame sent by each candidate base station 21, or respectively measure the second synchronization frame sent by each candidate base station 21, or measure the first synchronization frame and The second synchronization frame is measured, and then the measurement results of the first synchronization frame and the measurement results of the second synchronization frame are averaged, and a total of N measurement results are obtained. The target serving cell is determined from the candidate serving cells, and then, according to the moment of receiving the first synchronization frame sent by the target base station 21, the duration of the active state of the WUR interface 201 is adjusted to a second duration that is less than the first duration, so that the second duration is less than the first duration. After receiving the subsequent synchronization frame sent by the target base station 21, the second duration is the duration of the wake-up window of the WUR interface 201 in the current serving cell after the terminal device 20 selects the target serving cell as the current serving cell. Of course, the terminal device 20 may also adjust the start time of the wake-up window of its WUR interface 201 in the current serving cell according to the time of receiving the first synchronization frame of the current serving cell.

For example, the duration of the first window of the WUR interface 201 of the terminal device is 2ms, the transmission period of the synchronization frame is 120ms (which is also the period of the wakeup window of the WUR interface 201), and the start and end time (system clock) of a wakeup window is 995ms～997ms. The synchronization frame is the first synchronization frame sent by the target base station 21 as an example, the terminal device 20 first controls the WUR interface 201 to be in the active state for a first duration of 6 ms, which is greater than the first window duration, and receives N candidates within the first duration. The first synchronization frame sent by each candidate base station 21 in the base station 21 . After the target serving cell is determined, it is assumed that the target serving cell is the serving cell where the candidate base station 21(1) is located. At this time, the candidate base station 21(1) is the target base station 21(1), the period of the synchronization frame is 120ms, and the terminal device 20 For example, the time (system clock) of receiving the first synchronization frame sent by the target base station 21(1) is 1000ms. The terminal device 20 can determine the first synchronization frame sent by the target base station 21(1) according to the synchronization frame transmission period of 120ms and the arrival time of 1000ms. The arrival time of the two synchronization frames is 1120ms, and according to this time, the starting time of the active state of the WUR interface 201 is adjusted, and the duration of the active state of the WUR interface 201 is adjusted to the second duration. For example, when the target base station is received through the WUR interface 201 21(1) After sending the first synchronization frame, control the WUR interface 201 to be in a closed state, activate the WUR interface 201 at the moment of 1120ms, and control the WUR interface 201 to be in the active state for a second duration of 3ms that is less than the first duration . In this embodiment of the present application, the terminal device can adjust in real time the starting moment when the WUR interface 201 is in the active state and the duration of the active state according to the actual situation, so as to ensure accurate reception of the subsequent synchronization frames sent by the target base station 21(1). At the same time, the power consumption of the terminal device 20 is reduced.

3. For mode 3, since the period of the synchronization frame sent by at least one candidate base station 21 in the N candidate base stations 21 is different from the period of the synchronization frame sent by the source base station 21, the WUR interface 201 of the terminal device 20 is within the first window duration. It may not be possible to receive the synchronization frame separately sent by each candidate base station 21 of the N candidate base stations 21 . In this case, the terminal device 20 can control the WUR interface 201 to be in the active state for a third time period greater than the first window time period, so as to receive each of the N candidate base stations 21 through the WUR interface 201 within the third time period The first synchronization frame respectively sent by the candidate base stations 21, wherein the first synchronization frame respectively sent by each candidate base station 21 in the N candidate base stations 21 may be the first synchronization frame sent by each candidate base station 21, each candidate The first synchronization frame and the second synchronization frame respectively sent by the base station 21 are not specifically limited herein. In this embodiment of the present application, after the terminal device 20 receives the first synchronization frame sent by each candidate base station 21 of the N candidate base stations 21, it measures the first synchronization frame sent by each candidate base station 21, for example , respectively measure the first synchronization frame sent by each candidate base station 21, or respectively measure the second synchronization frame sent by each candidate base station 21, or measure the first synchronization frame and The second synchronization frame is measured, and then the measurement results of the first synchronization frame and the measurement results of the second synchronization frame are averaged, and a total of N measurement results are obtained. A target serving cell is determined from the candidate serving cells.

In the third mode, since the terminal device 20 cannot know in advance the period at which each candidate base station 21 of the N candidate base stations 21 transmits the synchronization frame respectively, in order to ensure that the subsequent synchronization frame sent by the target base station 21 can be correctly received, the terminal device 20 The period in which the target base station 21 sends the synchronization frame needs to be determined, and the specific implementation process includes but is not limited to the following two, which will be introduced separately below.

As an example, the terminal device 20 determines according to the time of receiving the first synchronization frame sent by the target base station 21 , or the time of receiving the first synchronization frame sent by the target base station 21 and the time of receiving the second synchronization frame sent by the target base station 21 The period at which the target base station 21 sends the synchronization frame, and then according to the calculated period and the time of receiving the subsequent synchronization frame sent by the target base station 21, the duration of the active state of the WUR interface 201 is adjusted to be a fourth duration that is smaller than the third duration, and in the fourth duration. The subsequent synchronization frame sent by the target base station 21 is received within the duration, and the fourth duration is the duration of the wake-up window of the WUR interface 201 in the current serving cell after the terminal device 20 selects the target serving cell as the current serving cell. Of course, the terminal device 20 may also, according to the moment of receiving the first synchronization frame of the current serving cell, or according to the moment of receiving the first synchronization frame and the second synchronization frame of the current serving cell, and the transmission period of the synchronization frame of the current serving cell, Adjust the start time of the wake-up window of its WUR interface 201 in the current serving cell.

For example, the window duration of the WUR interface 201 is 2ms, the synchronization frame transmission period is 120ms (that is, the wake-up window period of the WUR interface 201), the start time (system clock) of a wake-up window is 995ms～997ms, and the first synchronization frame is The first synchronization frame sent by the target base station 21 is taken as an example, the terminal device 20 first controls the WUR interface 201 to be in the active state for a third time length of 6 ms, which is greater than the first window time length, and receives N candidate base stations 21 within the third time length. The first synchronization frame sent by each candidate base station 21 respectively, and after the target serving cell is determined, the second synchronization frame sent by the target base station 21 is received. Then, assuming that the target serving cell is the serving cell where the candidate base station 21(1) is located, the terminal device 20 receives the candidate base station 21(1), that is, the moment (system clock) of the first synchronization frame sent by the target base station 21(1) is 1000ms, the time when the terminal device 20 receives the second synchronization frame sent by the target base station 21(1) is 1120ms, for example, the terminal device 20 can thus determine that the period at which the target base station 21(1) sends the synchronization frame is 120ms, and the terminal device 20 Further, it can be determined that the time when the third synchronization frame sent by the target base station 21(1) arrives is 1240ms, and then according to this time, the starting time when the WUR interface 201 is in the active state is adjusted, and the duration that the WUR interface 201 is in the active state is adjusted to be For the fourth duration, for example, after the terminal device 20 receives the second synchronization frame sent by the target base station 21(1), the WUR interface 201 is controlled to be in a closed state, and the WUR interface 201 is activated again at the moment of 1240ms, and the WUR interface 201 is controlled to be in an active state The duration is 3ms for the fourth duration that is less than the third duration. In the embodiment of the present application, the terminal device adjusts in real time the starting moment when the WUR interface 201 is in the active state and the duration of the active state according to the actual situation, so as to ensure accurate reception of the subsequent synchronization frames sent by the target base station 21(1) at the same time The power consumption of the terminal device 20 is reduced.

As another example, the synchronization frame sent by each candidate base station 21 in the N candidate base stations 21 further includes the period information of the synchronization frame sent by the candidate base station 21 , so that the terminal device 20 receives the first synchronization frame sent by the target base station 21 . frame, the arrival time of the next synchronization frame sent by the target base station 21 can be determined according to the time of receiving the first synchronization frame sent by the target base station 21, and the duration of the active state of the WUR interface 201 can be dynamically adjusted according to the time to be less than the fifth synchronization frame. The sixth duration of the duration is to receive the subsequent synchronization frame sent by the target base station 21 within the sixth duration. The sixth duration is that after the terminal device 20 selects the target serving cell as the current serving cell, its WUR interface 201 is in the current serving cell. The duration of the wake-up window. Of course, the terminal device 20 may also adjust the start time of the wake-up window of its WUR interface 201 in the current serving cell according to the time of receiving the first synchronization frame of the current serving cell.

For example, if the window duration of the WUR interface 201 of the terminal device 20 is 2ms, the synchronization frame sending period is 120ms (which is also the wakeup window period of the WUR interface 201), the start and end time (system clock) of a wakeup window is 995ms～997ms, the first synchronization frame Taking the first synchronization frame sent by the target base station 21 as an example, the terminal device 20 controls the WUR interface 201 to be in an active state for a fifth duration of 6 ms, which is greater than the first window duration, and receives N candidate base stations 21 within the fifth duration. The first synchronization frame sent by each candidate base station 21 respectively. After the target serving cell is determined, and the target serving cell is the serving cell where the candidate base station 21(1) is located, the terminal device 20 receives the candidate base station 21(1), that is, the first synchronization frame sent by the target base station 21(1). The time is 1000ms as an example, the terminal device 20 determines that the target base station 21(1) sends the second synchronization frame according to the period of 120ms carried by the target base station 21(1) in the first synchronization frame sent by the target base station 21(1). The time when each synchronization frame arrives is 1120ms, and according to this time, the starting time of the active state of the WUR interface 201 and the duration of the active state are adjusted to be a sixth time duration that is less than the fifth time duration. For example, when the terminal device 20 receives the target base station 21 ( 1) After the first synchronization frame is sent, the WUR interface 201 is controlled to be in a closed state, and the WUR interface 201 is activated again at the moment of 1120ms, and the duration of the control WUR interface 201 in the active state is less than the fifth duration and the sixth duration 3ms. In the embodiment of the present application, the terminal device adjusts the time when the WUR interface 201 is in the active state and the duration of the active state in real time according to the actual situation, so as to ensure accurate reception of the synchronization frame sent by the target base station 21(1), and at the same time reduce the number of terminal devices. 20 power consumption.

For the above two and three methods, in order to ensure that the terminal device 20 can receive the synchronization frame sent by each candidate base station 21 of all the candidate base stations 21, it is necessary to control the duration that the WUR interface 201 is in the active state longer than the WUR interface 201 in the source serving cell. The period of the wake-up window, such as 120ms in the above example.

Here, it should be noted that in the above 1, the period in which the candidate base station 21(1) transmits the synchronization frame 1 is the same as the period in which the source base station 21(2) transmits the synchronization frame, and the candidate base station 21(1) transmits the start of the synchronization frame 1 When the interval between the time and the start time when the source base station 21(2) sends the synchronization frame is less than or equal to the preset value, it is pre-specified by the standard protocol, or the core network equipment instructs each candidate base station 21 of the terminal equipment 20 to send the synchronization frame The period between the synchronization frames sent by the source base station 21 is the same as that of the source base station 21, and the interval between the start times of the synchronization frames is less than the preset value. The period of the synchronization frame is the same, and the interval between the start times of sending the synchronization frame is less than or equal to the preset value, the terminal device 20 adopts the above method 1 to receive the synchronization frame sent by the candidate base station 21 (1); the candidate base station in the above 2 21(1) When the period for sending synchronization frame 1 is the same as the period for sending synchronization frame 2 by the source base station 21(2), it is pre-specified by the standard protocol, or the core network equipment instructs each candidate base station 21 of the terminal equipment to send the synchronization frame period. It is the same as the period in which the source base station 21 sends the synchronization frame, that is, the terminal device 20 can know that the period in which each candidate base station 21 sends the synchronization frame is the same as the period in which the source base station 21 sends the synchronization frame, and does not know when each candidate base station 21 sends the synchronization frame. Whether the interval between the start time and the start time when the source base station 21 sends the synchronization frame is greater than the preset value, the terminal device 20 uses the above method 2 to receive the synchronization frame sent by the candidate base station 21 (1); The standard protocol stipulates, or the core network equipment instructs the terminal equipment 20, that is, the terminal equipment 20 cannot know whether the period of each candidate base station 21 sending the synchronization frame is the same as the period of the source base station 21 sending the synchronization frame, and the terminal equipment 20 uses The third method above receives the synchronization frame sent by the candidate base station 21(1).

In this embodiment of the present application, the synchronization frame sent by each candidate base station 21 in the N candidate base stations 21 can be used for the terminal device 20 to perform measurement, so as to select a target serving cell from the N candidate serving cells, while N The synchronization frame sent by each candidate base station 21 in the base stations 21 may also be used for synchronization between the WUR interface 201 of the terminal device 20 and the candidate base station 21 .

In the embodiment of the present application, the terminal device 20 receives the synchronization frame sent by each candidate base station 21 of the N candidate base stations through the WUR interface 201, and as described above, the signals received through the WUR interface 201 adopt a relatively simple modulation method, After receiving the synchronization frame sent by each candidate base station 21 of the N candidate base stations 21 through the WUR interface 201, the terminal device 20 can judge the information carried by the received synchronization frame through a relatively simple detection method, such as an energy detection method, Energy is 1, no energy is 0. Unlike the signal received through the main communication interface 202, the candidate base station 21 has adopted a more complex modulation and channel coding method, such as OFDM modulation, Turbo, Low Density Parity Check (Low Density Parity Check, LDPC) or Polar, etc. Channel coding method, so that complex signal processing operations such as Fast Fourier Transform (FFT) and Forward Error Correction (FEC) need to be performed on the terminal device 20 side, and these complex signal processing operations require consumes a lot of energy. Therefore, the power consumption of the terminal device 20 can be reduced by receiving signals through the WUR 201 interface compared to receiving signals through the main communication interface 202 .

Further, the terminal device 20 obtains N measurement results by measuring the first synchronization frame sent by each candidate base station 21 in the N candidate base stations 21, and then obtains N measurement results from the N serving cells where the N base stations 21 are located. After selecting a target serving cell, the terminal device can directly obtain the identification information of the TA to which the target serving cell belongs from the synchronization frame sent by the network device of the target serving cell, and then determine the TA to which the target serving cell belongs according to the identification information of the TA to which the target serving cell belongs. The TAI of the TAI eliminates the need for the terminal device to receive the system message of the target serving cell through the main communication interface after performing cell reselection, and perform complex analysis on the system message, thereby further reducing the power consumption of the terminal device.

In the embodiment of the present application, the above-mentioned process for the terminal device 20 to receive the synchronization frame sent by each candidate base station 21 of the N candidate base stations 21 is applicable to each candidate base station 21 of the N candidate base stations 21 respectively using the same frequency band carrier to send the synchronization frame. In this case, the terminal device 20 does not need to perform frequency domain switching when receiving the synchronization frame respectively sent by each candidate base station 21 of the N candidate base stations 21 . When each candidate base station 21 of the N candidate base stations 21 uses a different frequency band carrier to send the synchronization frame, the standard protocol will define the frequency of each frequency band carrier that each candidate base station 21 of the N candidate base stations 21 may use to send the synchronization frame. In this case, the terminal device 20 can listen to each frequency band carrier that may send a synchronization frame in turn, that is, for each frequency band carrier, use one of the above 1, 2, and 3 methods to perform frame listening and receiving. For example, the standard protocol defines that each of the N candidate base stations 21 may use the set of frequency band carriers for sending synchronization frames to include 2 frequency band carriers. Taking f1 and f2 as examples, the above-mentioned one, two, and One of the three methods is used for frame listening and reception, and for f2, one of the above-mentioned first, second and third methods can be used for frame listening and reception.

S43: The terminal device 20 acquires the identification information of the TA to which the target serving cell belongs from the synchronization frame sent by the target base station 21.

In the embodiment of the present application, if the identification information of the TA to which the target serving cell belongs in the synchronization frame sent by the target base station 21 is TAI, the terminal device 20 can directly obtain the TAI of the TA to which the target serving cell belongs; The identification information of the TA to which the target serving cell belongs, which is included in the synchronization frame, is part of the information TAC of the TAI, and the terminal device 20 determines the TAI of the TA to which the target cell belongs according to the known PLMN and TAC; The identification information of the TA to which the target serving cell belongs is indication information of the TAI of the TA to which the target serving cell belongs, and the terminal device 20 obtains the TAI of the TA to which the target serving cell belongs according to the correspondence between the indication information and the TAI.

S44: The terminal device 20 determines whether TA update needs to be performed according to the identification information of the TA to which the target serving cell belongs, and keeps the main communication interface of the terminal device in a closed state when not required.

In this embodiment of the present application, the target serving cell reselected by the terminal device 20 is the cell where the base station 21(1) is located as an example, and the terminal device 20 sends the data from the candidate base station 21(1), that is, the target base station 21(1). The identification information of the TA to which the target serving cell belongs is obtained in the synchronization frame 2 of the TAI, taking TAI as an example. The terminal device 20 will determine whether the TAI of the TA to which the target serving cell belongs is in the TA list stored by the terminal device 20 . If it is in the TA list, TA update is not required, and the terminal device 20 can keep the main communication interface 202 in a closed state to reduce the power consumption of the terminal device. If it is not in the TA list, TA update needs to be performed. At this time, the terminal device 20 can activate the main communication interface 202 to perform TA update with the target base station 21(1) through the main communication interface 202. Please refer to FIG. 6 for the process of TA update performed by the target base station 21(1).

1. The terminal device 20 initiates a random access (RA Preamble) to the target base station 21(1);

2. After detecting the random access initiated by the terminal device 20, the target base station 21(1) sends a random access response message (RA Response) to the terminal device 20;

3. After receiving the RA Response, the terminal device 20 sends an RRC connection request message (RRC Connection Request) to the target base station 21 (1);

4. The target base station 21(1) sends an RRC connection setup message (RRC Connection Setup) to the terminal device 20;

5. The terminal device 20 sends an RRC connection establishment complete message (RRC ConnectionSetup) to the target base station 21(1) according to the RRC connection establishment complete signaling radio bearer (Signaling RadioBearers1, SRB1) and radio resource configuration, which includes the tracking area update ( Tracking Area Update, TAU) request (TAU Request) message;

6. The target base station 21(1) sends an Initial UE Message (Initial UE Message) to the Evolved Packet Core (EPC), where the Initial UE Message includes a TAU Request;

7. The authentication/security (Authentication/Security) process is completed between the terminal device 20 and the EPC;

8. The EPC completes the context update of the terminal device 20;

9. The EPC sends a Downlink NAS Transport message (Downlink NAS Transport) to the target base station 21(1); the message includes a TAU Accept message (TAU Accept);

10. The target base station 21(1) sends a downlink information transfer message (DL InformationTransfer) to the terminal device 20; the message includes TAU Accept;

11. The terminal device 20 sends an uplink information transfer message (UL InformationTransfer) to the target base station 21(1); the message includes a TAU complete message (TAU Complete);

12. The target base station 21(1) sends an uplink non-access stratum transport message (Uplink NAS Transport) to the EPC; the message includes TAU Complete;

13. The terminal device 20 sends the first uplink data (First Uplink Data) to the EPC;

14. The EPC completes the bearer update;

15. The EPC sends the first downlink data (First Downlink Data) to the terminal device 20;

16. The terminal device 20 enters the idle mode again.

In the embodiment of the present application, the synchronization frame respectively sent by each candidate base station 21 of the N candidate base stations 21 may further include cell identification information of the serving cell where the candidate base station 21 is located. After the terminal device 20 completes the cell reselection, the process of receiving the system message of the target serving cell through the main communication interface 202 to obtain the cell identification information of the serving cell where the candidate base station 21 of the target cell is located from the system message is omitted. Reduce power consumption of end devices.

In this embodiment of the present application, the cell identity information of the serving cell where the candidate base station 21 is located may be a physical layer cell identity (Physical-lay Cell Identity, PCI), or part of the information in the PCI, or an indication for indicating the PCI information, after acquiring the indication information, the terminal device 20 may determine the PCI indicated by the indication information according to the corresponding relationship between the indication information and the PCI.

It should be noted here that the synchronization frame respectively sent by each candidate base station 21 of the N candidate base stations 21 may only include the cell identification information of the cell where the candidate base station 21 is located, that is, each of the N candidate base stations 21 The candidate base station 21 includes identification information of the TA of the cell where the candidate base station 21 is located and/or cell identification information of the cell where the candidate base station 21 is located.

Referring to FIG. 7 , an embodiment of the present application provides a method and device for acquiring identification information of a tracking area TA of a cell reselection serving cell. The method is applicable to the terminal equipment 20 and base station 21 shown in FIG. 2 .

S71: The base station 21 generates a synchronization frame, and the synchronization frame includes the identification information of the tracking area TA to which the cell where the base station 21 belongs;

The synchronization frame includes the identification information of the tracking area TA to which the cell where the base station 21 belongs is the same as the identification information of the tracking area TA to which the cell where the base station 21 belongs in Embodiment 4, and will not be repeated here.

S72: The base station 21 sends the synchronization frame.

In the embodiment of the present application, after the base station 21 generates the synchronization frame, it broadcasts the synchronization frame at a certain preset period, and the terminal device 20 receives the synchronization frame sent by the base station 21 only after determining the target serving cell.

S73: After determining the target serving cell, the terminal device 20 receives the synchronization frame sent by the target base station 21 by waking up the radio frequency WUR interface 201;

In this embodiment of the present application, the target base station 21 is a target serving cell after the terminal device 20 performs cell reselection, that is, a base station of a new serving cell determined by the terminal device 20 through cell reselection.

In this embodiment of the present application, the terminal device 20 determines the target serving cell, for example, through the primary communication interface 202 to receive reference signals sent by each of the N base stations 21 of the N candidate serving cells, where N is greater than or an integer equal to 1. The terminal device 20 measures the reference signals sent by each base station 21 respectively, and selects a target serving cell from the N serving candidate cells according to the N measurement results obtained. After the target serving cell is determined, the synchronization frame sent by the target base station 21 is received through the WUR interface. Here, the N base stations 21 of the N candidate cells are referred to as N candidate base stations 21, the base station 21 of the target serving cell is referred to as the target base station 21, and the base station of the serving cell where the terminal device is performing cell reselection is referred to as The source base station 21, the serving cell where the source base station 21 is located is called the source serving cell. And the terminal device 20 corresponds to a wake-up window. The wake-up window is determined by the terminal device 20 in the source serving cell where the source base station 21 is located. The wake-up window includes the start time of the wake-up window and the duration of the wake-up window. The duration of the wake-up window in the cell is called the first window duration.

In this embodiment of the present application, the period at which the target base station 21 sends the synchronization frame may be the same as or different from the period at which the synchronization frame is sent by the source base station 21; can be the same or different. They are introduced separately below.

1. The period at which the target base station 21 sends the synchronization frame is the same as the period at which the source base station 21 sends the synchronization frame. set value, wherein the preset value is the first window duration of the WUR interface 201 of the terminal device 20 .

2. The period at which the target base station 21 sends the synchronization frame is the same as the period at which the source base station 21 sends the synchronization frame, and the interval between the start time when the target base station 21 sends the synchronization frame and the start time at which the source base station 21 sends the synchronization frame is greater than the preset value , wherein the preset value is the first window duration of the WUR interface 201 of the terminal device 20 .

3. The period at which the target base station 21 sends the synchronization frame is different from the period at which the source base station 21 sends the synchronization frame, and the interval between the start time when the target base station 21 sends the synchronization frame and the start time when the source base station 21 sends the synchronization frame is greater than the preset value , wherein the preset value is the first window duration of the WUR interface 201 of the terminal device 20 .

Here, it should be noted that in the above 1, the period in which the target base station 21 sends the synchronization frame 1 is the same as the period in which the source base station 21 sends the synchronization frame, and the target base station 21 (1) sends the synchronization frame 1 at the start time and the source base station 21 sends When the interval between the start times of the synchronization frames is less than or equal to the preset value, it is pre-specified by the standard protocol, or the core network device instructs the terminal device 20 to send the synchronization frame by each target base station 21 and the source base station 21 sends the synchronization frame. The period of the target base station 21 is the same, and the interval between the start times of sending the synchronization frame is smaller than the preset value, that is, the terminal device 20 can know that the period in which the target base station 21 sends the synchronization frame is the same as the period in which the source base station 21 sends the synchronization frame, and the synchronization frame is sent. The interval between the start times of 1 and 2 is less than or equal to the preset value, and the terminal device 20 adopts the above-mentioned method 1 to receive the synchronization frame sent by the target base station 21; in the above 2, the period in which the target base station 21 sends the synchronization frame 1 is the same as that of the source base station 21. When the period of frame 2 is the same, it is pre-specified by the standard protocol, or the core network equipment instructs the terminal equipment to select the target base station 21 to send the synchronization frame. The period at which the base station 21 sends the synchronization frame is the same as the period at which the source base station 21 sends the synchronization frame, and it is unknown whether the interval between the start time when the target base station 21 sends the synchronization frame and the start time at which the source base station 21 sends the synchronization frame is greater than the preset time. value, the terminal device 20 uses the above method 2 to receive the synchronization frame sent by the target base station 21; and in the above-mentioned situation 3, no standard protocol is required, or the core network device is instructed to the terminal device 20, that is, the terminal device 20 cannot know Whether the period in which the target base station 21 sends the synchronization frame is the same as the period in which the source base station 21 sends the synchronization frame, the terminal device 20 uses the above method 3 to receive the synchronization frame sent by the target base station 21 .

Based on the description in the fourth embodiment, the WUR interface 201 of the terminal device 20 may be in an active state continuously, or may be activated at certain time intervals. Wherein, when the WUR interface 201 of the terminal device 20 is continuously in the active state, no matter which transmission mode the target base station 21 sends the synchronization frame, the terminal device 20 can receive the transmission from the target base station 21 through the WUR interface 201 within the first window duration. synchronization frame. However, when the WUR interface 201 of the terminal device 20 is activated at certain time intervals, when the target base station 21 adopts different transmission modes, the terminal device 20 needs to adopt different reception modes, which will be introduced separately below.

1. For Mode 1, since the period at which the target base station 21 sends the synchronization frame is the same as the period at which the source base station 21 sends the synchronization frame, there is a difference between the start time of the target base station 21 sending the synchronization frame and the start time of the source base station 21 sending the synchronization frame. The interval is smaller than the first window duration, so that the terminal device 20 can always receive the synchronization frame sent by the target base station 21 through the WUR interface 201 within the first window duration. The specific examples are the same as the examples in the first embodiment of the fourth embodiment, and are not repeated here.

2. For Mode 2, since the period at which the target base station 21 sends the synchronization frame is the same as the period at which the source base station 21 sends the synchronization frame, there is a difference between the start time when the target base station 21 sends the synchronization frame and the start time at which the source base station 21 sends the synchronization frame. The interval is greater than the first window duration, so that the terminal device 20 may not be able to receive the synchronization frame sent by the target base station 21 within the first window duration.

In this case, the terminal device 20 can control the duration that the WUR interface 201 is in the active state to be the first duration, which is greater than the first window duration, so as to receive the first duration sent by the target base station 21 through the WUR interface 201 within the first duration. A synchronization frame, where the first synchronization frame may be the first synchronization frame sent by the target base station 21, the first synchronization frame and the second synchronization frame sent by the target base station 21, which are not specifically limited herein. In the embodiment of the present application, after the terminal device 20 receives the first synchronization frame sent by the target base station 21, according to the moment of receiving the first synchronization frame sent by the target base station 21, the duration of the active state of the WUR interface 201 is adjusted to be less than the first synchronization frame. The second duration of the duration is to receive the subsequent synchronization frame sent by the target base station 21 within the second duration, and the second duration is that after the terminal device 20 selects the target serving cell as the current serving cell, its WUR interface 201 is in the current serving cell. The duration of the wake-up window. Of course, the terminal device 20 may also adjust the start time of the wake-up window of its WUR interface 201 in the current serving cell according to the time of receiving the first synchronization frame of the current serving cell. The specific examples are the same as the examples in the second of the fourth embodiment, and are not repeated here.

3. For Mode 3, since the period at which the target base station 21 sends the synchronization frame is different from the period at which the source base station 21 sends the synchronization frame, there is a difference between the start time of the target base station 21 sending the synchronization frame and the start time of the source base station 21 sending the synchronization frame. The interval is greater than the first window duration, so that the terminal device 20 may not be able to receive the synchronization frame sent by the target base station 21 within the first window duration.

In the third mode, since the terminal device 20 cannot know the period of the synchronization frame sent by the target base station 21 in advance, in order to ensure that the subsequent synchronization frame sent by the target base station 21 can be correctly received, the terminal device 20 needs to determine that the target base station 21 sends the synchronization frame. The specific implementation process includes but is not limited to the following two types, which will be introduced separately below.

As an example, the terminal device 20 determines according to the time of receiving the first synchronization frame sent by the target base station 21 , or the time of receiving the first synchronization frame sent by the target base station 21 and the time of receiving the second synchronization frame sent by the target base station 21 The period at which the target base station 21 sends the synchronization frame, and then according to the calculated period and the time of receiving the subsequent synchronization frame sent by the target base station 21, the duration of the active state of the WUR interface 201 is adjusted to be a fourth duration that is smaller than the third duration, and in the fourth duration. The subsequent synchronization frame sent by the target base station 21 is received within the duration, and the fourth duration is the duration of the wake-up window of the WUR interface 201 in the current serving cell after the terminal device 20 selects the target serving cell as the current serving cell. Of course, the terminal device 20 may also, according to the moment of receiving the first synchronization frame of the current serving cell, or according to the moment of receiving the first synchronization frame and the second synchronization frame of the current serving cell, and the transmission period of the synchronization frame of the current serving cell, Adjust the start time of the wake-up window of its WUR interface 201 in the current serving cell. The specific examples are the same as the examples in the third of the fourth embodiment, and are not repeated here.

As another example, the synchronization frame sent by the target base station 21 also includes the period information of the synchronization frame sent by the target base station 21, so that after receiving the first synchronization frame sent by the target base station 21, the terminal device 20 can The time of the first synchronization frame sent by 21 determines the arrival time of the next synchronization frame sent by the target base station 21, and dynamically adjusts the duration of the active state of the WUR interface 201 according to this time to be a sixth duration that is less than the fifth duration, so that in the first The subsequent synchronization frame sent by the target base station 21 is received within six durations, and the sixth duration is the duration of the wake-up window of the WUR interface 201 in the current serving cell after the terminal device 20 selects the target serving cell as the current serving cell. Of course, the terminal device 20 may also adjust the start time of the wake-up window of its WUR interface 201 in the current serving cell according to the time of receiving the first synchronization frame of the current serving cell. The specific examples are the same as the examples in the third of the fourth embodiment, and are not repeated here.

S74: The terminal device 20 obtains, from the synchronization frame, the identification information of the TA to which the target serving cell belongs;

S75: The terminal device 20 determines whether TA update needs to be performed according to the identification information of the TA to which the target serving cell belongs, and keeps the main communication interface of the terminal device in a closed state when not required.

In the embodiment of the present application, after the terminal device 20 obtains the identification information of the TA to which the target serving cell belongs from the synchronization frame, the terminal device determines whether to perform TA update according to the identification information of the TA to which the target serving cell belongs. The specific process of the TA update is the same as the figure. The process of updating the TA in the embodiment shown in 4 will not be repeated here.

The embodiment of the present application provides a data transmission method, which is specifically described as follows:

In the scenario shown in FIG. 12 , a base station (a kind of network device) may perform data transmission with user equipment (User Equipment, UE) (also referred to as terminal equipment herein). The base station can send wake-up signals, such as wake-up frames and synchronization frames; the UE is configured with the WUR module and the main communication module, and can receive the wake-up signals sent by the base station through the WUR module. In terms of product form, it can be the base station or the UE that sends the wake-up signal. FIG. 5C is an example of a base station sending a wake-up signal. The scenario involved in the present invention is the scenario in which the IDLE state UE moves to the edge of the current serving cell and cell reselection occurs as shown in Figure 13, and the situation of each cell is shown in Figure 12, that is, the base station of each cell can send wake-up Signal.

Assuming that the UE is configured with a Wake-up Radio (WUR) interface, when the UE is in an idle (IDLE) state, the UE can close the main communication interface (eg, LTE/NR interface) and open the WUR interface. The WUR can be continuously activated, or it can work in an intermittent working mode as shown in Figure 3.

After the UE introduces the WUR interface, the base station can send a synchronization frame in addition to the wake-up frame, and the synchronization frame is also a kind of wake-up signal, which can be received by the WUR interface of the UE. The WUR synchronization frame may also be called a WUR beacon (Beacon) frame, abbreviated as a synchronization frame or a beacon frame. The role of the synchronization frame includes one or more of the following roles:

This enables the UE to perform the measurement process based on the synchronization frame when the primary communication interface is turned off and the WUR interface is turned on. For example, the UE determines whether cell reselection needs to be performed based on the measurement of the synchronization frame. In this way, the UE does not need to open the main communication connection to receive the PSS/SSS and the cell reference signal, so as to achieve the purpose of power saving.

If the WUR of the UE works in the intermittent working mode, the UE needs to maintain timing synchronization with the base station based on the reception of the synchronization frame, so that the wake-up window of the UE will not miss possible wake-up frames due to excessive clock drift.

It is assumed that the UE decides to perform cell reselection based on receiving the synchronization frame of the original serving cell, and determines a new serving cell by receiving the synchronization frame of the target cell. At this time, the UE can open the main communication interface and determine the new serving cell identity by receiving the new serving cell synchronization signal and system message (the new serving cell identity needs to be determined by receiving PSS/SSS and MIB), thereby completing the cell reselection. Then, the UE can open the main communication interface to receive the system message (eg SIB1) of the new serving cell to determine the TAI of the new serving cell, so as to decide whether to perform the TA update procedure. In the above process, the UE needs to open the main communication interface to receive PSS/SSS and system messages (MIB & SIB1), which obviously consumes more power.

Based on the above reasons, the basic idea of the solution for reducing the power consumption of the UE proposed by the present invention is: the base station sends a WUR synchronization frame, which carries the TA identification information to which the base station belongs. In this way, when the UE performs cell reselection, it does not need to open the main communication interface to receive the SIB1 of the new serving cell to obtain the TAI of the new serving cell, but only needs to determine whether to move out according to the WUR synchronization frame of the new serving cell. The cells included in the TA List saved by itself, and then determine whether the main communication interface needs to be opened to perform the TA update process.

The solution of the present invention enables the IDLE state UE to complete cell reselection, acquisition of the TA to which the new serving cell belongs, and determination of whether to perform the TA update process without activating the primary communication interface, thereby making the UE more power-saving.

The WUR synchronization frame sent by the base station may further include base station identification information or cell identification information. In this way, when the UE performs cell reselection, it does not need to open the main communication interface to receive the PSS/SSS and MIB of the new serving cell to obtain the new serving cell identity, but can obtain the new serving cell only by receiving the WUR synchronization frame of the new serving cell. The identity of the serving cell is used to complete the cell reselection. It should be noted that the WUR synchronization frame sent by the base station includes cell identification information and TA identification information, which are independent of each other, that is, the WUR synchronization frame may include any one of the cell identification information and the TA identification information, or both. two.

As shown in Figure 12, WUR Beacon is the WUR synchronization frame, TA ID is the TA identification information of the TA to which the cell where the WUR Beacon belongs, and Cell ID is the cell identification information of the cell where the WUR Beacon is sent.

In this way, by carrying the TA identification information and the cell identification information in the WUR synchronization frame, the IDLE state UE can complete the cell reselection without activating the main communication interface during the moving process, thereby reducing the UE power consumption. Only when the UE judges that it has moved out of the cell included in the TA List configured by the network side according to the TA identification information carried in the WUR synchronization frame of the new serving cell, the UE needs to open the main communication interface to perform the TA update process. The signaling interaction flow of the IDLE state UE performing the TA update process through the new serving cell is shown in FIG. 4 . This process is an existing technology of the existing 3GPP standard, so the specific process will not be repeated.

The above-mentioned TA identification information may be TAI, a part of TAI, or other information generated based on TAI that can be used to identify the TA to which the base station belongs. For example, TAI consists of PLMN and TAC, and PLMN is used to identify network service operators. Considering that a frequency band in the same area is generally allocated to only one operator, the TA identification information may not include PLMN, but only TAC, so that Reduce the length of the TA identification information, thereby reducing the length of the WUR synchronization frame and saving overhead. The TA identification information may also be a part of the TAC, such as the lower bits of the TAC. Similarly, the cell identity information may be PCI (Physical-layer Cell Identity, physical layer cell identity) in the current standard, or may be a part of the PCI, or other information generated based on the PCI that can be used to identify a base station or a cell.

The WUR synchronization frame of each cell is regularly sent by the base station. For example, the WUR synchronization frame is periodically sent by the base station, and the sending period can be configured by the base station, or is predefined by the standard. For the former, the base station can configure the period of the WUR synchronization frame through upper layer information such as RRC, system messages, and MAC CE, or through physical layer signaling such as DCI. The base station may also configure time and/or frequency resources used for sending the WUR synchronization frame, that is, time domain and/or frequency domain resource allocation for the WUR synchronization frame. In addition, the base station can also configure the time starting point for sending the WUR synchronization frame, that is, the moment when the first WUR synchronization frame is sent. Specifically, the time starting point can be represented by a time offset. For example, the time offset may be the time interval between the first WUR synchronization frame and the base station configuration information.

The transmission periods of the WUR synchronization frames of different cells may be the same or different. In the case that the transmission periods of the WUR synchronization frames of different cells are the same, the transmission times of the WUR synchronization frames of different cells may be approximately the same, or there may be time offsets. If the WUR of the UE is continuously activated, the UE can always receive the WUR synchronization frames of other cells through the WUR, and judge the transmission period of the WUR synchronization frames of the cell based on at least two received WUR synchronization frames of the same cell. However, if the UE adopts the intermittent activation mode as shown in Figure 3, the methods for the UE to listen to the WUR synchronization frames of other cells are different in different situations:

Case 1: Assume that the WUR synchronization frame transmission periods of different cells are the same, and the WUR synchronization frame transmission timings of different cells are roughly the same, as shown in Figure 5A;

The transmission timings of WUR synchronization frames of different cells may be exactly the same, but in this case, WUR synchronization frames of adjacent cells are likely to interfere with each other. Therefore, the WUR synchronization frame transmission timings of different cells can be configured to be approximately the same. For example, they are located in the same subframe, but occupy different mini-slots. Specifically, "substantially the same" means that the offset between the transmission times of the WUR synchronization frames of adjacent cells does not exceed the wake-up window duration of the UE. This can be achieved through coordination between base stations. Since neighboring cells send WUR synchronization frames at roughly the same timing, the UE can receive WUR synchronization frames from other cells in its own wake-up window, determine a new serving cell based on the measurement of these WUR synchronization frames, and complete cell reselection.

Case 2: It is assumed that the transmission periods of WUR synchronization frames of different cells are the same, but there is a large offset between the transmission timings of WUR synchronization frames of different cells, as shown in Figure 5B;

The "large offset" here means that the offset between the transmission times of the WUR synchronization frames of adjacent cells exceeds the wake-up window duration of the UE. In this case, when the UE finds that the signal of the original serving cell is weak and needs to perform cell reselection, it cannot hear the WUR synchronization frames of other cells in the wake-up window. At this time, the UE can keep its WUR interface active for a period of time (not less than the transmission period of the WUR synchronization frame) in order to receive the WUR synchronization frame of other cells, and then determine the new serving cell according to the measurement of the WUR synchronization frame of other cells. Since the transmission periods of the WUR synchronization frames of different cells are the same, the UE can determine the transmission time of the subsequent WUR synchronization frames based on one WUR synchronization frame received from the new serving cell.

Case 3: It is assumed that the transmission periods of WUR synchronization frames of different cells are different, and there is a large offset between the transmission timings of WUR synchronization frames of different cells, as shown in Figure 5C;

The definition of "larger offset" is the same as in Case 2. In this case, similar to Case 2, the UE also needs to keep its own WUR interface active for a period of time in order to receive WUR synchronization frames from other cells, thereby completing cell reselection. However, since the WUR synchronization frame transmission period of different cells is different, and the UE does not know the WUR synchronization frame transmission period of the new serving cell, there are two methods for the UE to obtain the WUR synchronization frame transmission period of the new serving cell. One method is that the UE's WUR interface remains active for a long period of time until at least two WUR synchronization frames from the new serving cell are received, and the UE can obtain a new service based on the distance between two adjacent WUR synchronization frames. The transmission period of the cell, and then the transmission time of the subsequent synchronization frames; another method is that the WUR synchronization frame sent by the base station carries its own WUR synchronization frame transmission period, so that the UE receives a WUR synchronization frame of the new serving cell. That is, the sending time of the subsequent synchronization frame can be determined according to the sending period carried by it. In the second method, the WUR interface of the UE does not need to remain active for a long time (it is sufficient to receive a WUR synchronization frame of the new serving cell), but it will cause the WUR synchronization frame to become longer and the indication overhead to increase.

If the standard pre-defines the WUR synchronization frame of different cells in the same sending period and the transmission timing is roughly the same, or the network side indicates the information, the UE adopts the method of Case 1 to obtain the WUR synchronization frame of other cells; if the standard pre-defines the WUR synchronization frame of different cells If the frame sending period is the same or the network side indicates this information, but the UE is not sure whether the sending time of different cells is roughly the same, the UE uses the Case 2 method to obtain the WUR synchronization frames of other cells; if the UE sends WUR synchronization frames to different cells Whether the period is the same and whether the transmission timing is roughly the same cannot be determined, the UE adopts the method of Case 3 to obtain the WUR synchronization frame of other cells.

The above method for obtaining the WUR synchronization frame of other cells is applicable to the case where different cells use the same carrier frequency to send the WUR synchronization frame, that is, the UE does not need to perform frequency domain switching when receiving the WUR synchronization frame. If the carrier frequencies used for sending WUR synchronization frames are different in different cells, but the standard predefines a set of carrier frequencies that may be used to send WUR synchronization frames, the UE may listen to each potential carrier frequency that may send WUR synchronization frames in turn (that is, in the Dwell on each potential carrier frequency for a period of time), and perform corresponding operations on each potential carrier frequency according to the above three situations (Case1~Case 3) to receive possible adjacent cell WUR synchronization frames and related configuration information ( The transmission cycle and time offset of the WUR synchronization frame, etc.).

The following describes the device provided by the embodiments of the present application with reference to the accompanying drawings.

FIG. 8 shows a schematic structural diagram of a terminal device 800 . The terminal device 800 may include a receiving unit 801 and an obtaining unit 802, wherein the receiving unit 801 may be configured to perform S42 in the embodiment shown in FIG. 4 and/or S73 in the embodiment shown in FIG. 7 . The obtaining unit 702 may be configured to perform S43 in the embodiment shown in FIG. 4 and/or S74 in the embodiment shown in FIG. 7 . Wherein, all relevant contents of the steps involved in the above method embodiments can be cited in the functional description of the corresponding functional module, and are not repeated here.

FIG. 9 shows a schematic structural diagram of a network device 900 . The network device 900 may include a generating unit 901 and a sending unit 902, where the generating unit 901 may be configured to perform S41 in the embodiment shown in FIG. 4 and/or S71 in the embodiment shown in FIG. 7 . The sending unit 902 may be configured to perform S42 in the embodiment shown in FIG. 4 and/or S72 in the embodiment shown in FIG. 7 . Wherein, all relevant contents of the steps involved in the above method embodiments can be cited in the functional descriptions of the corresponding functional modules, which will not be repeated here.

FIG. 10 shows a schematic structural diagram of a terminal device 1000 . The terminal device 1000 may include a wake-up radio WUR interface 1001 and a processor 1002 , and the WUR interface 1001 is coupled to the processor 1002 . Wherein, the processor 1002 may be a central processing unit (CPU), or an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), may be one or more integrated circuits for controlling program execution, may be a baseband chip, etc. .

The terminal device 1000 may also include a memory 1003 and a main communication interface 1004, the memory 1003 and the main communication interface 1004 being coupled to the processor 1002, respectively. The number of memories may be one or more, and the memory may be a read only memory (Read only Memory, ROM), a random access memory (Random Access Memory, RAM) or a disk memory, and so on.

By designing and programming the processor 1002, the code corresponding to the aforementioned method for obtaining the identification information of the tracking area TA of the target serving cell for cell reselection is solidified into the chip, so that the chip can execute the aforementioned FIG. 4 or FIG. The method for obtaining the identification information of the tracking area TA of the cell reselection target serving cell provided by the embodiment shown in 7, and how to design and program the processor 1002 is a technique known to those skilled in the art, and will not be repeated here.

FIG. 11 shows a schematic structural diagram of a network device 1100 . The network device 1100 may include a processor 1101 and a transmitter 1102 coupled to the processor 1101 . Wherein, the processor 1101 may be a central processing unit (CPU), or an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), may be one or more integrated circuits for controlling program execution, may be a baseband chip, etc. . The transmitter 1102 can be used as a main communication interface for sending and receiving signals of the main communication interface, and can also be used as a WUR interface for sending a wake-up signal.

Network device 1100 may also include memory 1103 coupled to processor 1101 . The number of memories may be one or more, and the memory may be a read only memory (Read only Memory, ROM), a random access memory (Random Access Memory, RAM) or a disk memory, and so on.

By designing and programming the processor 1101, the code corresponding to the aforementioned method for obtaining the identification information of the tracking area TA of the target serving cell for cell reselection is solidified into the chip, so that the chip can execute the aforementioned FIG. 4 or FIG. The method for obtaining the identification information of the tracking area TA of the cell reselection target serving cell provided by the embodiment shown in 7. How to design and program the processor 1101 is a technique known to those skilled in the art, and will not be repeated here.

Embodiments of the present application further provide a computer storage medium, where the storage medium may include a memory, and the memory may store a program, and when the program is executed, the program includes the terminal device described in the method embodiment shown in FIG. 4 or FIG. 7 above. All steps performed, or all steps performed by a network device.

The embodiments of the present application further provide a computer program product, which, when invoked and executed by a computer, can cause the computer to execute the method shown in the method embodiment shown in FIG. 4 or FIG. 7 .

An embodiment of the present application further provides a chip system, where the chip system includes a processor, and is configured to support a terminal device or a network device to implement the method provided in the embodiment shown in FIG. 4 or FIG. 7 , for example, generate or process FIG. 4 or The data and/or information involved in the method provided by the embodiment shown in FIG. 7 . The chip system further includes a memory, which is used for storing necessary program instructions and data of the terminal device or network device, and the processor in the chip system can call the program instructions and data stored in the memory in the chip system, so that the The chip system can realize the above-mentioned terminal equipment or network equipment can realize the functions. The chip system may be composed of chips, or may include chips and other discrete devices.

An embodiment of the present application further provides a communication system, including the terminal device 1000 provided by the embodiment shown in FIG. 10 and the network device 1100 provided by the embodiment shown in FIG. 11 .

The network elements involved in the present invention include a base station (eg, gNB, generation Node B, that is, a base station referred to in the 5G NR standard) and a user terminal UE.

Referring to FIG. 14 , the base station 1400 includes: a processor 1401 , a memory 1402 , a transceiver 1403 and a bus 1404 . The transceiver 1403 is used as the main communication interface for sending and receiving main communication interface signals (for example, LTE/NR signals), and also serves as the WUR interface for sending wake-up signals. The processor 1401 , the memory 1402 and the transceiver 1403 are connected to each other through a bus 1404 . The bus 1404 may be a Peripheral Component Interconnect (English: Peripheral Component Interconnect, referred to as: PCI) bus or an Extended Industry Standard Architecture (English: Extended Industry Standard Architecture, referred to as: EISA) bus or the like. The above-mentioned bus 1404 can be divided into an address bus, a data bus, a control bus, and the like. For ease of presentation, only one thick line is shown in FIG. 14, but it does not mean that there is only one bus or one type of bus. In some other embodiments, the base station 1400 shown in FIG. 14 includes a transceiver 1403 and a transmitter 1405, wherein the transceiver 1403 serves as a primary communication interface for receiving and transmitting primary communication interface signals (eg, LTE/NR signals), and the transmitter 1405 is used as WUR interface to send wake-up signal.

Embodiments of the present invention further provide a non-volatile storage medium, where one or more program codes are stored in the non-volatile storage medium. When the processor 1401 of the base station 1400 executes the program codes, the base station 1400 executes this program code. Relevant method steps performed by the base station in any method embodiment of the present invention.

The base station 1400 provided by the embodiment of the present invention can perform the relevant method steps performed by the base station in any method embodiment of the present invention, the detailed description of each module or unit thereof, and the execution of each module or unit by the base station in any method embodiment of the present invention. For the technical effects brought about by the execution of the relevant method steps, reference may be made to the relevant descriptions in the method embodiments of the present invention, which will not be repeated here.

Referring to FIG. 15 , the UE 1500 includes: a processor 1501 , a memory 1502 , a transceiver 1503 , a receiver 1505 and a bus 1504 . Wherein, the transceiver 1503 is used as the main communication interface to send and receive main communication interface signals (for example, LTE/NR signals), and the receiver 1505 is also used as the WUR interface to receive the wake-up signal. The processor 1501 , the memory 1502 and the transceiver 1503 are connected to each other through a bus 1504 . The bus 1504 may be a PCI bus or an EISA bus or the like. The bus 1504 can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in FIG. 15, but it does not mean that there is only one bus or one type of bus.

An embodiment of the present invention further provides a non-volatile storage medium, where one or more program codes are stored in the non-volatile storage medium. When the processor 1501 of the UE 1500 executes the program codes, the UE 1500 executes the present invention Relevant method steps performed by the UE in any method embodiment.

The detailed description of each module in the UE 1500 provided by the embodiment of the present invention and the technical effect brought by each module after performing the relevant method steps performed by the UE in any method embodiment of the present invention may refer to the method embodiment of the present invention. Related descriptions are not repeated here.

An embodiment of the present application provides a network device, and the network device has a function of implementing the behavior of the network device in the foregoing method embodiments. The functions can be implemented by hardware, or can be implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to each sub-function of the above-mentioned functions. Optionally, the network device may be a base station.

An embodiment of the present application provides a terminal device, and the terminal device has a function of implementing the behavior of the terminal device in the foregoing method embodiments. The functions can be implemented by hardware, or can be implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to each sub-function of the above-mentioned functions. Optionally, the terminal device may be user equipment.

An embodiment of the present application further provides a communication system, where the system includes the network device and the terminal device described in the foregoing embodiments.

Embodiments of the present application further provide a computer storage medium for storing computer software instructions used by the above-mentioned network device, which includes a program designed to execute the functions implemented by the network device in the above-mentioned embodiments.

Embodiments of the present application further provide a computer storage medium for storing computer software instructions used by the above-mentioned terminal device, which includes a program designed to execute the functions implemented by the terminal device in the above-mentioned embodiments.

Embodiments of the present invention further provide a computer-readable storage medium on which a computer program is stored, and when the computer program is executed by a computer, implements the method processes related to the terminal device in the above method embodiments. Specifically, the computer may be the above-mentioned terminal device.

Embodiments of the present invention further provide a computer-readable storage medium on which a computer program is stored, and when the computer program is executed by a computer, implements the method flow related to the network device in the above method embodiments. Specifically, the computer may be the above-mentioned network device.

It should be understood that the processor mentioned in the embodiments of the present invention may be a central processing unit (Central Processing Unit, CPU), and may also be other general-purpose processors, digital signal processors (Digital Signal Processors, DSP), application specific integrated circuits (Application Specific Integrated Circuits) Integrated Circuit, ASIC), off-the-shelf Programmable Gate Array (Field Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

It should also be understood that the memory mentioned in the embodiments of the present invention may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. Wherein, the non-volatile memory may be Read-Only Memory (ROM), Programmable Read-Only Memory (PROM), Erasable Programmable Read-Only Memory (Erasable PROM, EPROM), Erase programmable read-only memory (Electrically EPROM, EEPROM) or flash memory. The volatile memory may be random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM are available, such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (Double DataRate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (Enhanced SDRAM, ESDRAM), synchronous link dynamic random access memory (Synchlink DRAM, SLDRAM) And direct memory bus random access memory (Direct Rambus RAM, DR RAM).

It should be noted that when the processor is a general-purpose processor, DSP, ASIC, FPGA or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components, the memory (storage module) is integrated in the processor.

As will be appreciated by those skilled in the art, the embodiments of the present application may be provided as a method, a system, or a computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to the present application. It will be understood that each flow and/or block in the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to the processor of a general purpose computer, special purpose computer, embedded processor or other programmable data processing device to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing device produce Means for implementing the functions specified in a flow or flow of a flowchart and/or a block or blocks of a block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory result in an article of manufacture comprising instruction means, the instructions The apparatus implements the functions specified in the flow or flow of the flowcharts and/or the block or blocks of the block diagrams.

These computer program instructions can also be loaded on a computer or other programmable data processing device to cause a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process such that The instructions provide steps for implementing the functions specified in the flow or blocks of the flowcharts and/or the block or blocks of the block diagrams.

Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

It should be noted that the memory described herein is intended to include, but not be limited to, these and any other suitable types of memory.

It should also be understood that the first, second and various numeral numbers mentioned herein are only for the convenience of description, and are not used to limit the scope of the present application.

It should be understood that, in the various embodiments of the present application, the size of the sequence numbers of the above-mentioned processes does not mean the sequence of execution, and the execution sequence of each process should be determined by its functions and internal logic, and should not be dealt with in the embodiments of the present invention. implementation constitutes any limitation.

Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementations should not be considered beyond the scope of this application.

Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the above-described systems, devices and units may refer to the corresponding processes in the foregoing method embodiments, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as independent products, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be embodied in the form of a software product in essence, or the part that contributes to the prior art or the part of the technical solution. The computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program codes .

The relevant parts of the various method embodiments of the present invention may refer to each other; the apparatus provided by each apparatus embodiment is used to execute the method provided by the corresponding method embodiment, so each apparatus embodiment may refer to the relevant method embodiments in the relevant method embodiments. partially understood.

The device structure diagrams given in each device embodiment of the present invention only show a simplified design of the corresponding device. In practical applications, the apparatus may include any number of transmitters, receivers, processors, memories, etc., to implement the functions or operations performed by the apparatus in each apparatus embodiment of the present invention, and all apparatuses that can implement the present application All are within the scope of protection of this application.

The names of messages/frames/indication information, modules or units provided in the embodiments of the present invention are only examples, and other names may be used as long as the messages/frames/indication information, modules or units have the same functions.

The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. As used in the embodiments of the present invention and the appended claims, the singular forms "a," "the," and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise.

Depending on the context, the words "if" or "if" as used herein may be interpreted as "at" or "when" or "in response to determining" or "in response to detecting." Similarly, the phrases "if determined" or "if detected (the stated condition or event)" can be interpreted as "when determined" or "in response to determining" or "when detected (the stated condition or event)," depending on the context )" or "in response to detection (a stated condition or event)".

Those of ordinary skill in the art can understand that all or part of the steps in the methods of the above embodiments can be completed by instructing relevant hardware through a program, and the program can be stored in a readable storage medium of a device, and when the program is executed , including all or part of the above steps, the storage medium, such as: FLASH, EEPROM, etc.

The specific embodiments described above further describe the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that different embodiments can be combined, and the above are only specific embodiments of the present invention. , is not used to limit the protection scope of the present invention, any combination, modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims (21)

1. A method for obtaining identification information of a Tracking Area (TA) of a cell reselection target serving cell, the method comprising:

the method comprises the steps that terminal equipment obtains a synchronization frame sent by network equipment of a target service cell and received through a wake-up radio frequency WUR interface, wherein the synchronization frame comprises identification information of a TA (timing advance) to which the target service cell belongs, and the target service cell is the service cell in which the terminal equipment is located after cell reselection;

the terminal equipment acquires the identification information of the TA to which the target serving cell belongs from the synchronous frame;

and the terminal equipment determines whether TA updating is needed according to the identification information of the TA to which the target service cell belongs, and keeps a main communication interface of the terminal equipment in a closed state when the TA updating is not needed.

2. The method of claim 1, wherein before the terminal device acquires the synchronization frame transmitted by the network device of the target serving cell received via the wake-up rf WUR interface, the method further comprises:

the terminal device receives a synchronization frame sent by each network device in N network devices of N candidate service cells through the WUR interface, wherein the candidate service cells are any one of the N candidate service cells, and N is an integer greater than or equal to 1;

the terminal equipment measures the first synchronous frame sent by each network equipment respectively to obtain N measuring results;

and the terminal equipment determines the target service cell from the N candidate service cells according to the N measurement results and records the target service cell as the current service cell.

3. The method of claim 2, wherein the WUR interface corresponds to a wake-up window determined by the terminal device in a source serving cell, wherein the wake-up window is a time window during which the WUR interface is active, and wherein a window duration of the wake-up window is a first window duration;

the terminal device receives the synchronization frame sent by each network device in the N network devices of the N candidate serving cells through the WUR interface, and the method includes:

the terminal equipment receives the synchronous frames respectively sent by each network equipment in the N network equipment through the WUR interface within the first window duration; or

The terminal equipment receives a first synchronization frame which is respectively sent by each network equipment in the N network equipment through the WUR interface within a first duration that the WUR interface is in the activated state; after the target service cell is determined, according to the time when the network equipment receiving the target service cell sends a first synchronization frame, adjusting the time length of the WUR interface in the activated state to be a second time length, and receiving a subsequent synchronization frame sent by the network equipment of the target service cell through the WUR interface in the second time length, wherein the first time length is longer than the first window time length, and the second time length is shorter than the first time length; or

The terminal equipment receives a first synchronization frame which is respectively sent by each network equipment in the N network equipment through the WUR interface within a third time length when the WUR interface is in the activated state; after the target serving cell is determined, adjusting the time length of the WUR interface in the activated state to be a fourth time length according to the time of receiving a first synchronization frame sent by the network equipment of the target serving cell or the time of receiving the first synchronization frame sent by the network equipment of the target serving cell and the time of receiving a second synchronization frame sent by the network equipment of the target serving cell, and receiving a subsequent synchronization frame sent by the network equipment of the target serving cell through the WUR interface within the fourth time length, wherein the third time length is greater than the first window time length, and the fourth time length is less than the third time length; or

The terminal equipment receives a first synchronization frame which is respectively sent by each network equipment in the N network equipment through the WUR interface within a fifth time length when the WUR interface is in the activated state; and after the target serving cell is determined, according to the time of receiving a first synchronization frame sent by the network equipment of the target serving cell and the period of sending the synchronization frame by the network equipment of the target serving cell included in the first synchronization frame, adjusting the time length of the WUR interface in the activated state to be a sixth time length, and receiving a subsequent synchronization frame sent by the network equipment of the target serving cell through the WUR interface in the sixth time length, wherein the fifth time length is greater than the first window time length, and the sixth time length is less than the fifth time length.

4. The method according to claim 1, wherein the terminal device determines whether TA update is required according to the identification information of the TA to which the target serving cell belongs, and when not required, the terminal device keeps a primary communication interface in a closed state, including:

and if the terminal equipment determines that the tracking area identification TAI indicated by the identification information of the TA to which the target serving cell belongs is in a TA list stored by the terminal equipment, keeping the main communication interface in a closed state.

5. The method of any of claims 1-4, wherein the synchronization frame further comprises cell identification information of the target serving cell.

6. A method for obtaining identification information of a Tracking Area (TA) of a cell reselection target serving cell, the method comprising:

the method comprises the steps that a network device generates a synchronous frame, wherein the synchronous frame comprises identification information of a TA (timing advance) to which a cell where the network device is located belongs;

and the network equipment sends the synchronization frame so that the terminal equipment can receive the synchronization frame by waking up the radio frequency WUR interface, acquire the identification information of the TA to which the cell of the network equipment belongs from the synchronization frame, determine whether TA updating is needed according to the identification information of the TA to which the cell of the network equipment belongs, and keep the main communication interface of the terminal equipment in a closed state when the TA updating is not needed.

7. The method of claim 6, wherein the network device transmitting the synchronization frame comprises:

and the network equipment sends the synchronous frame according to a preset period.

8. The method according to claim 7, wherein the synchronization frame further includes duration information of the preset period.

9. The method according to any of claims 6-8, wherein the synchronization frame further comprises cell identification information of the cell in which the network device is located.

10. A terminal device, comprising:

a wake-up radio frequency WUR interface for receiving or transmitting data;

the main communication interface is used for receiving or sending data and is in a closed state;

a processor, configured to obtain a synchronization frame sent by a network device of a target serving cell received through the WUR interface, where the synchronization frame includes identification information of a TA to which the target serving cell belongs, and the target serving cell is a serving cell in which the terminal device is located after cell reselection; acquiring identification information of the TA to which the target serving cell belongs from the synchronization frame; and determining whether TA updating is needed according to the identification information of the TA to which the target service cell belongs, and keeping the main communication interface in the closed state when the TA updating is not needed.

11. The terminal device of claim 10, wherein the processor is further configured to:

controlling the WUR interface to receive a synchronization frame sent by each of N network devices of N candidate service cells respectively, wherein the candidate service cells are any one of the N candidate service cells, and N is an integer greater than or equal to 1;

respectively measuring the first synchronization frame sent by each network device and received by the WUR interface to obtain N measurement results;

and determining a target service cell from the N candidate service cells according to the N measurement results, and recording the target service cell as a current service cell.

12. The terminal device of claim 11, wherein the WUR interface corresponds to a wake-up window determined by the terminal device in a source serving cell, the wake-up window is a time window in which the WUR interface is active, and a window duration of the wake-up window is a first window duration;

when receiving the synchronization frame respectively sent by each of the N network devices of the N candidate serving cells, the WUR interface is specifically configured to:

and receiving the synchronization frame respectively sent by each network device in the N network devices within the first window duration of the WUR interface.

13. The terminal device of claim 11, wherein the WUR interface corresponds to a wake-up window determined by the terminal device in a source serving cell of a source network device, the wake-up window being a time window in which the WUR interface is active, a window duration of the wake-up window being a first window duration;

when receiving the synchronization frame respectively sent by each of the N network devices of the N candidate serving cells, the WUR interface is specifically configured to: receiving a first synchronization frame sent by each network device in the N network devices within a first time length of the WUR interface in the activated state, wherein the first time length is longer than the first window time length;

the processor is further configured to adjust a duration of the WUR interface in the active state to be a second duration according to a time when the network device receiving the target serving cell sends the first synchronization frame after the target serving cell is determined, where the second duration is less than the first duration;

when receiving the synchronization frame sent by each network device of the N network devices, the WUR interface is further specifically configured to: and receiving a subsequent synchronization frame sent by the network equipment of the target serving cell reselected by the terminal equipment within the second time length.

14. The terminal device of claim 11, wherein the WUR interface corresponds to a wake-up window determined by the terminal device in a source serving cell of a source network device, the wake-up window being a time window in which the WUR interface is active, a window duration of the wake-up window being a first window duration;

when receiving the synchronization frame respectively sent by each of the N network devices of the N candidate serving cells, the WUR interface is specifically configured to: receiving a first synchronization frame sent by each network device in the N network devices within a third time length of the WUR interface in the activated state, wherein the third time length is greater than the first window time length;

the processor is further configured to, after the target serving cell is determined, adjust a duration of the WUR interface in the active state to a fourth duration according to a time of receiving a first synchronization frame sent by the network device of the target serving cell or a time of receiving a first synchronization frame sent by the network device of the target serving cell and a time of receiving a second synchronization frame sent by the network device of the target serving cell, where the fourth duration is smaller than the third duration;

when receiving the synchronization frame sent by each network device of the N network devices, the WUR interface is further specifically configured to: and receiving a subsequent synchronization frame sent by the network equipment of the target serving cell reselected by the terminal equipment within the fourth time.

15. The terminal device of claim 11, wherein the WUR interface corresponds to a wake-up window determined by the terminal device in a source serving cell of a source network device, the wake-up window being a time window in which the WUR interface is active, a window duration of the wake-up window being a first window duration;

when receiving the synchronization frame respectively sent by each of the N network devices of the N candidate serving cells, the WUR interface is specifically configured to: receiving a first synchronization frame respectively sent by each network device in the N network devices within a fifth time length of the WUR interface in the activated state, wherein the fifth time length is greater than the first window time length;

the processor is further configured to, after the target serving cell is determined, adjust a duration of the WUR interface in the active state to a sixth duration according to a time at which a first synchronization frame sent by the network device of the target serving cell is received and a synchronization frame sending period of the network device of the target serving cell included in the first synchronization frame, where the sixth duration is smaller than the fifth duration;

when receiving the synchronization frame sent by each network device of the N network devices, the WUR interface is further specifically configured to: and receiving a subsequent synchronization frame sent by the network equipment of the target serving cell reselected by the terminal equipment within the sixth time length.

16. A terminal device according to any of claims 10-15, characterized in that the terminal device further comprises a memory;

the processor, when determining whether TA update is needed according to the identification information of the TA to which the target serving cell belongs, and when not needed, keeping the primary communication interface in the closed state, is specifically configured to:

and if the tracking area identification TAI indicated by the identification information of the TA to which the target serving cell belongs is determined to be in the TA list stored in the memory, keeping the main communication interface in the closed state.

17. A network device, comprising:

a processor, configured to generate a synchronization frame, where the synchronization frame includes identification information of a tracking area TA to which a cell where the network device is located belongs;

and the transmitter is used for transmitting the synchronization frame so that the terminal equipment can receive the synchronization frame through a wake-up radio frequency WUR interface, acquiring the identification information of the TA to which the cell of the network equipment belongs from the synchronization frame, determining whether TA updating is needed according to the identification information of the TA to which the cell of the network equipment belongs, and keeping a main communication interface of the terminal equipment in a closed state when the TA updating is not needed.

18. The network device of claim 17, wherein the transmitter, when transmitting the synchronization frame, is specifically configured to:

and sending the synchronous frame according to a preset period.

19. The network device of claim 18, wherein the synchronization frame further comprises duration information of the preset period.

20. The network device of any of claims 17-19, wherein the synchronization frame further comprises cell identification information of a cell in which the network device is located.

21. A computer storage medium having stored thereon instructions which, when executed on a computer, cause the computer to perform the method of any one of claims 1-9.

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