WO2023023904A1

WO2023023904A1 - Method for determining ta effective time in ntn, and apparatus therefor

Info

Publication number: WO2023023904A1
Application number: PCT/CN2021/114131
Authority: WO
Inventors: 池连刚
Original assignee: 北京小米移动软件有限公司
Priority date: 2021-08-23
Filing date: 2021-08-23
Publication date: 2023-03-02
Also published as: CN116018840A

Abstract

Disclosed in the embodiments of the present application are a method for determining an uplink timing advance (TA) effective time in a non-terrestrial network (NTN), and an apparatus therefor, which method and apparatus can be applied to an NTN system. The method comprises: a terminal device receiving configuration information that is configured by a network device, wherein the configuration information at least comprises configuration parameters that are used when the terminal device is used to calculate the duration of an uplink TA effective timer; and the terminal device calculating the duration of the TA effective timer according to the configuration parameters, and determining a TA effective time according to the duration of the TA effective timer. By means of implementing the embodiments of the present application, it can be ensured that effective uplink synchronization can be maintained in an NTN.

Description

Method and device for determining valid time of TA in NTN network

technical field

The present application relates to the field of communication technology, and in particular to a method and device for determining the effective time of an uplink timing advance in a non-terrestrial network NTN.

Background technique

In the research of wireless communication technology, satellite communication is considered to be an important aspect in the development of future wireless communication technology. Satellite communication refers to the communication carried out by radio communication equipment on the ground using satellites as relay nodes. The satellite communication system consists of a satellite part and a ground part. Satellite communication has the characteristics of large communication range and is not easily affected by land disasters. It is foreseeable that in the future wireless communication system, the satellite communication system and the terrestrial cellular communication system will gradually achieve deep integration and truly realize the intelligent connection of all things. For example, NTN (Non-terrestrial Network, non-terrestrial/terrestrial communication) is an important technology introduced by 5G (5th Generation Mobile Communication Technology, fifth-generation mobile communication technology), which uses satellites (or drones) instead of ground The base station provides wireless resources. However, there is currently no effective means for determining the effective duration of the uplink timing advance to ensure uplink synchronization in the NTN network.

Contents of the invention

The embodiment of the present application provides a method and device for determining the effective time of the uplink timing advance in the non-terrestrial network NTN, which can be applied to the NTN network system and can more accurately adapt to the movement of satellites and terminal equipment. , reducing the complexity of the terminal equipment while maintaining effective uplink synchronization.

In the first aspect, the embodiment of the present application provides a method for determining the effective time of the uplink timing advance in the non-terrestrial network NTN, the method is executed by a terminal device, and the method includes:

receiving configuration information configured by the network device; the configuration information at least includes the configuration parameters used by the terminal device to calculate the duration of the uplink timing advance TA valid timer;

calculating the duration of the TA valid timer according to the configuration parameters;

Determine the valid time of the TA according to the duration of the TA valid timer.

In this technical solution, the duration of the TA effective timer can be calculated according to the configuration parameters configured by the network device for calculating the duration of the uplink timing advance TA effective timer, and then determined by the duration of the TA effective timer. The effective time of the value of the TA can ensure effective uplink synchronization in the NTN network.

In an implementation manner, the configuration parameters at least include: a reference value of the duration of the timer; a first scaling factor related to satellite movement; and one or more values of a second scaling factor related to the moving speed of the terminal device.

In a possible implementation manner, the second scaling factor has one or more values, and each value corresponds to a speed level of a terminal device; the calculating the TA valid timer according to the configuration parameters The duration includes: determining the level of the current moving speed of the terminal device; determining the target factor value of the second scaling factor corresponding to the current moving speed level according to the level of the current moving speed of the terminal device; The reference value of the timer duration, the first scaling factor and the target factor value are used to calculate the duration of the TA valid timer.

In one implementation, the moving speed of the terminal equipment is graded; the speed range corresponding to the speed grade of the terminal equipment is specified by the protocol, or the speed range corresponding to the speed grade of the terminal equipment is determined by the network device through signaling instruct.

In this technical solution, the duration of the TA valid timer can be calculated according to the configuration parameters configured by the network equipment for calculating the duration of the uplink timing advance TA valid timer. The related first scaling factor and the second scaling factor related to the movement of the terminal equipment can make the effective time of the determined TA value more accurately adapt to the movement of the satellite and the movement of the terminal equipment. In the case of maintaining effective uplink synchronization Next, the complexity of the terminal equipment can be reduced.

In a possible implementation manner, the calculating the duration of the TA effective timer according to the reference value of the timer duration, the first scaling factor, and the target factor value includes: Perform a product operation on the reference value of timer duration, the first scaling factor and the target factor value, and determine the duration of the TA valid timer according to the obtained product value.

In an implementation manner, the determining the valid time of the TA according to the duration of the valid timer of the TA includes: starting the timer of the TA when acquiring the TA for the first time; The value of the timer is less than the duration of the TA valid timer, and it is determined that the value of the TA is within the valid time.

In an implementation manner, the determining the valid time of the TA according to the duration of the valid timer of the TA includes: restarting the timer of the TA when reacquiring the TA; The value of the timer is less than the duration of the TA valid timer, and it is determined that the value of the TA is within the valid time.

In an implementation manner, the determining the valid time of the TA according to the duration of the TA valid timer further includes: responding that the value of the TA timer is greater than or equal to the value of the TA valid timer A period of time to determine that the value of the TA is in an invalid state.

In the second aspect, the embodiment of the present application provides another method for determining the effective time of the uplink timing advance in the non-terrestrial network NTN, the method is executed by a network device, and the method includes:

Configure the configuration parameters used for calculating the duration of the uplink timing advance TA effective timer for the terminal device;

Send the configuration parameters to the terminal device.

In this technical solution, by configuring the configuration parameters used for calculating the uplink timing advance TA valid timer duration for the terminal device, so that the terminal device can calculate the duration of the TA valid timer according to the configuration parameters, and then use The duration of the TA valid timer determines the valid time of the value of the TA, which can ensure effective uplink synchronization in the NTN network.

In a possible implementation manner, the second scaling factor has one or more values, and each value corresponds to a speed level of a terminal device.

In this technical solution, since the configuration parameters configured by the network device for the terminal device include at least the first scaling factor related to satellite movement and the second scaling factor related to the movement of the terminal device, it is possible to make the TA value determined by the terminal device effective. The time is more accurately adapted to the movement of the satellite and the movement of the terminal equipment, and the complexity of the terminal equipment can be reduced while maintaining effective uplink synchronization.

In the third aspect, the embodiment of this application provides a communication device, which has some or all functions of the terminal equipment in the method described in the first aspect above, for example, the functions of the communication device may have part or all of the functions in this application The functions in the embodiments may also have the functions of independently implementing any one of the embodiments in the present application. The functions described above may be implemented by hardware, or may be implemented by executing corresponding software on the hardware. The hardware or software includes one or more units or modules corresponding to the above functions.

In an implementation manner, the structure of the communication device may include a transceiver module and a processing module, and the processing module is configured to support the communication device to perform corresponding functions in the foregoing method. The transceiver module is used to support communication between the communication device and other equipment. The communication device may further include a storage module, which is used to be coupled with the transceiver module and the processing module, and stores necessary computer programs and data of the communication device.

As an example, the processing module may be a processor, the transceiver module may be a transceiver or a communication interface, and the storage module may be a memory.

In the fourth aspect, the embodiment of the present application provides another communication device, which can implement some or all of the functions of the network equipment in the method example described in the second aspect above, for example, the functions of the communication device can have some of the functions in this application Or the functions in all the embodiments may also have the function of implementing any one embodiment in the present application alone. The functions described above may be implemented by hardware, or may be implemented by executing corresponding software on the hardware. The hardware or software includes one or more units or modules corresponding to the above functions.

In an implementation manner, the structure of the communication device may include a transceiver module and a processing module, and the processing module is configured to support the communication device to perform corresponding functions in the foregoing method. The transceiver module is used to support communication between the communication device and other devices. The communication device may further include a storage module, which is used to be coupled with the transceiver module and the processing module, and stores necessary computer programs and data of the communication device.

In a fifth aspect, an embodiment of the present application provides a communication device, where the communication device includes a processor, and when the processor invokes a computer program in a memory, it executes the method described in the first aspect above.

In a sixth aspect, an embodiment of the present application provides a communication device, where the communication device includes a processor, and when the processor invokes a computer program in a memory, it executes the method described in the second aspect above.

In the seventh aspect, the embodiment of the present application provides a communication device, the communication device includes a processor and a memory, and a computer program is stored in the memory; the processor executes the computer program stored in the memory, so that the communication device executes The method described in the first aspect above.

In an eighth aspect, the embodiment of the present application provides a communication device, the communication device includes a processor and a memory, and a computer program is stored in the memory; the processor executes the computer program stored in the memory, so that the communication device executes The method described in the second aspect above.

In the ninth aspect, the embodiment of the present application provides a communication device, the device includes a processor and an interface circuit, the interface circuit is used to receive code instructions and transmit them to the processor, and the processor is used to run the code instructions to make the The device executes the method described in the first aspect above.

In the tenth aspect, the embodiment of the present application provides a communication device, the device includes a processor and an interface circuit, the interface circuit is used to receive code instructions and transmit them to the processor, and the processor is used to run the code instructions to make the The device executes the method described in the second aspect above.

In the eleventh aspect, the embodiment of the present application provides a system for determining the effective time of the uplink timing advance in the non-terrestrial network NTN, the system includes the communication device described in the third aspect and the communication device described in the fourth aspect , or, the system includes the communication device described in the fifth aspect and the communication device described in the sixth aspect, or, the system includes the communication device described in the seventh aspect and the communication device described in the eighth aspect, or, the The system includes the communication device described in the ninth aspect and the communication device described in the tenth aspect.

In the twelfth aspect, the embodiment of the present invention provides a computer-readable storage medium, which is used to store instructions used by the above-mentioned terminal equipment, and when the instructions are executed, the terminal equipment executes the above-mentioned first aspect. method.

In a thirteenth aspect, an embodiment of the present invention provides a readable storage medium for storing instructions used by the above-mentioned network equipment, and when the instructions are executed, the network equipment executes the method described in the above-mentioned second aspect .

In a fourteenth aspect, the present application further provides a computer program product including a computer program, which, when run on a computer, causes the computer to execute the method described in the first aspect above.

In a fifteenth aspect, the present application further provides a computer program product including a computer program, which, when run on a computer, causes the computer to execute the method described in the second aspect above.

In a sixteenth aspect, the present application provides a computer program that, when run on a computer, causes the computer to execute the method described in the first aspect above.

In a seventeenth aspect, the present application provides a computer program that, when run on a computer, causes the computer to execute the method described in the second aspect above.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiment of the present application or the background art, the following will describe the drawings that need to be used in the embodiment of the present application or the background art.

FIG. 1 is a schematic structural diagram of a communication system provided by an embodiment of the present application;

FIG. 2 is a flowchart of a method for determining the effective time of an uplink timing advance in a non-terrestrial network NTN provided by an embodiment of the present application;

FIG. 3 is a flow chart of another method for determining the effective time of uplink timing advance in the non-terrestrial network NTN provided by the embodiment of the present application;

4 is a flow chart of another method for determining the effective time of uplink timing advance in the non-terrestrial network NTN provided by the embodiment of the present application;

5 is a flow chart of another method for determining the effective time of uplink timing advance in the non-terrestrial network NTN provided by the embodiment of the present application;

FIG. 6 is a schematic structural diagram of a communication device provided by an embodiment of the present application;

FIG. 7 is a schematic structural diagram of another communication device provided by an embodiment of the present application.

Detailed ways

Embodiments of the present disclosure are described in detail below, examples of which are illustrated in the drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present disclosure and should not be construed as limiting the present disclosure. Among them, in the description of the present disclosure, unless otherwise specified, "/" means or means, for example, A/B can mean A or B; "and/or" in this article is only an association describing associated objects A relationship means that there may be three kinds of relationships, for example, A and/or B means: A exists alone, A and B exist simultaneously, and B exists alone.

The new generation of AR (Augmented Reality, Augmented Reality)/VR (Virtual Reality, Virtual Reality), the continuous emergence of new Internet applications such as vehicle-to-vehicle communication has put forward higher requirements for wireless communication technology, driving the continuous evolution of wireless communication technology and meet the needs of the application. At present, cellular mobile communication technology is in the evolution stage of a new generation of technology. An important feature of the new generation technology is to support flexible configuration of various business types. Because different business types have different requirements for wireless communication technologies, such as eMBB (enhanced Mobile Broad Band, enhanced mobile broadband) business needs focus on large bandwidth, high speed, etc.; URLLC (Ultra Reliable Low Latency Communication, ultra-reliable Low-latency communication) business needs focus on high reliability and low delay; mMTC (massive Machine Type Communication, low-power large connection) business needs focus on massive connections. Therefore, a new generation of wireless communication system needs a flexible and configurable design to support the transmission requirements of various business types.

In the research of wireless communication technology, satellite communication is considered to be an important aspect in the development of future wireless communication technology. Satellite communication refers to the communication carried out by radio communication equipment on the ground using satellites as relay nodes. The satellite communication system consists of a satellite part and a ground part. The characteristics of satellite communication are: the communication range is large, as long as it is within the range covered by the radio waves emitted by the satellite, communication can be carried out from any two points; it is not easily affected by land disasters (high reliability). Satellite communication can be used as an important supplement to the terrestrial cellular communication system. Satellite communication has at least the following 1)-3) advantages:

1) Extended coverage: For areas where the terrestrial cellular communication system cannot cover or has high coverage costs, such as oceans, deserts, remote mountainous areas, etc., using satellite communication can solve communication problems in these areas at a lower cost;

2) Emergency communication: In extreme cases of disasters such as earthquakes, etc., the ground cellular communication infrastructure is unavailable, the use of satellite communication can quickly establish a communication connection and improve rescue efficiency;

3) Provide industry applications: For example, for delay-sensitive services of long-distance transmission, the delay of service transmission can be reduced through satellite communication.

It is foreseeable that in the future wireless communication system, the satellite communication system and the terrestrial cellular communication system will gradually achieve deep integration and truly realize the intelligent connection of all things. Transmission of 4G ( ^4th Generation, fourth generation) or 5G ( ^5th Generation, fifth generation) signals through communication satellites has become one of the standardization tasks of 3GPP (Third Generation Partnership Project, Third Generation Partnership Project).

In related technologies, the effective duration of the uplink timing advance in the terrestrial network (TN) is configured by configuring a Timer (timer) in the network equipment. However, the configuration of the effective duration timer for the uplink timing advance of the terrestrial network is designed based on a base station with a fixed location, without considering the movement of the satellite or the movement speed of the terminal. The above method is difficult to adapt to the scenario of satellite communication. That is to say, there is currently no effective means for determining the effective duration of the uplink timing advance to ensure uplink synchronization in the NTN network.

Based on the above problems, this application proposes a method and device for determining the effective time of the uplink timing advance in the non-terrestrial network NTN, which can determine the effective duration of the uplink timing advance to ensure that effective uplink synchronization can be maintained in the NTN network .

In order to better understand the method for determining the effective time of the uplink timing advance in the non-terrestrial network NTN disclosed in the embodiment of the present application, the communication system used in the embodiment of the present application is firstly described below.

Please refer to FIG. 1 . FIG. 1 is a schematic structural diagram of a communication system provided by an embodiment of the present application. The communication system may be an NTN network system. The communication system may include, but is not limited to, a network device and a terminal device. The number and form of the devices shown in Figure 1 are for example only and do not constitute a limitation to the embodiment of the application. In practical applications, two or more network equipment, two or more terminal equipment. The communication system shown in FIG. 1 includes one network device 101 and one terminal device 102 as an example.

It should be noted that the technical solutions of the embodiments of the present application may be applied to various communication systems. For example: long term evolution (long term evolution, LTE) system, fifth generation (5th generation, 5G) mobile communication system, 5G new air interface (new radio, NR) system, non-terrestrial network (NTN) system, or other future new types mobile communication systems, etc.

The network device 101 in this embodiment of the present application is an entity on the network side for transmitting or receiving signals. For example, the network device 101 may be an evolved base station (evolved NodeB, eNB), a transmission point (transmission reception point, TRP), a next generation base station (next generation NodeB, gNB) in an NR system, or a base station in other future mobile communication systems Or an access node in a wireless fidelity (wireless fidelity, WiFi) system, etc. The embodiment of the present application does not limit the specific technology and specific device form adopted by the network device. The network device provided by the embodiment of the present application may be composed of a centralized unit (central unit, CU) and a distributed unit (distributed unit, DU), wherein the CU may also be called a control unit (control unit), using CU-DU The structure of the network device, such as the protocol layer of the base station, can be separated, and the functions of some protocol layers are placed in the centralized control of the CU, and the remaining part or all of the functions of the protocol layer are distributed in the DU, and the CU centrally controls the DU.

The terminal device 102 in the embodiment of the present application is an entity on the user side for receiving or transmitting signals, such as a mobile phone. The terminal equipment may also be called terminal equipment (terminal), user equipment (user equipment, UE), mobile station (mobile station, MS), mobile terminal equipment (mobile terminal, MT) and so on. The terminal device can be a car with communication functions, a smart car, a mobile phone, a wearable device, a tablet computer (Pad), a computer with a wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality ( augmented reality (AR) terminal equipment, wireless terminal equipment in industrial control (industrial control), wireless terminal equipment in self-driving (self-driving), wireless terminal equipment in remote medical surgery (remote medical surgery), smart grid ( Wireless terminal devices in smart grid, wireless terminal devices in transportation safety, wireless terminal devices in smart city, wireless terminal devices in smart home, etc. The embodiment of the present application does not limit the specific technology and specific device form adopted by the terminal device.

It can be understood that the communication system described in the embodiment of the present application is to illustrate the technical solution of the embodiment of the present application more clearly, and does not constitute a limitation to the technical solution provided in the embodiment of the present application. With the evolution of the system architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

The method, device and storage medium for determining the effective time of the uplink timing advance in the non-terrestrial network NTN provided by the present application will be described in detail below with reference to the accompanying drawings.

Please refer to FIG. 2 . FIG. 2 is a flow chart of a method for determining the effective time of uplink timing advance in the non-terrestrial network NTN provided by the embodiment of the present application. It should be noted that the method for determining the effective time of the uplink timing advance in the non-terrestrial network NTN in the embodiment of the present application can be applied to a terminal device. As shown in Fig. 2, the method for determining the effective time of the uplink timing advance in the non-terrestrial network NTN may include but not limited to the following steps.

Step 201, receiving configuration information of network device configuration.

In an implementation manner, the configuration information includes at least configuration parameters used by the terminal device to calculate the duration of the uplink timing advance TA valid timer. Optionally, the network device may configure the terminal device with configuration parameters used for calculating the effective timer duration of the uplink timing advance (TA).

Wherein, the configuration parameters may include at least the influence factor related to the satellite movement and the influence factor related to the movement of the terminal equipment, so that the terminal equipment can be more accurate when calculating the duration of the effective timer of the uplink timing advance (TA). Adapt to the movement of the satellite and the movement of the terminal.

Step 202, calculate the duration of the TA valid timer according to the configuration parameters.

In some embodiments, the configuration parameters may at least include but not limited to: a reference value of the timer duration; a first scaling factor related to satellite movement; one or more values of a second scaling factor related to the moving speed of the terminal equipment value. It can be understood that since both the satellite and the terminal equipment are moving, when determining the effective time of the uplink timing advance (TA), the moving speed of the satellite and the moving speed of the terminal equipment can be considered. A scaling factor, and set one or more values of the second scaling factor related to the mobile speed of the terminal equipment, and use the first scaling factor, the second scaling factor and the reference value of the timer duration to calculate the uplink timing advance amount (TA) the duration of the valid timer, so that the calculated uplink timing advance (TA) duration of the valid timer can more accurately adapt to the movement of the satellite and the movement of the terminal.

Step 203: Determine the valid time of the TA according to the duration of the TA valid timer.

Optionally, when the duration of the TA valid timer is calculated, the valid duration of the TA value may be determined according to the duration of the TA valid timer, that is, the valid duration of the TA value obtained by the terminal device is determined.

In one implementation, when acquiring the value of TA for the first time, the terminal device can start the timer of TA, and when the value of the timer of TA is less than the duration of the valid timer of the TA, determine the value of TA acquired by the terminal device within the validity period. For example, assuming that the duration of calculating the valid timer of TA is 5 seconds, the terminal device obtains the value of TA for the first time, and starts the timer of TA, and the value of the timer of TA is less than the duration of the valid timer of TA (such as 5 seconds ), it can be determined that the TA value acquired by the terminal device for the first time is valid within these 5 seconds, that is, the TA value acquired by the terminal device is valid within these 5 seconds. For another example, when the value of the TA timer is greater than or equal to the duration of the TA valid timer (for example, 5 seconds), it may be determined that the TA value acquired by the terminal device for the first time is in an invalid state.

In another implementation, when reacquiring the value of TA, the terminal device needs to restart the timer of TA, and when the value of the timer of restarted TA is less than the duration of the valid timer of TA, determine the value of the reacquired TA The value is within the valid time. For example, assuming that the duration of calculating the effective timer of TA is 5 seconds, the terminal device obtains the value of TA and starts the timer of the TA. When the value of the timer of the TA is 3 seconds, the terminal device obtains a new The value of the TA, the timer of the TA can be restarted, and the timing can be restarted. When the value of the restarted timer is less than the duration of the effective timer of the TA (such as 5 seconds), the TA obtained by the terminal device can be determined again. The value of TA is valid within these 5 seconds, that is, the value of TA re-acquired by the terminal device is valid within these 5 seconds. For another example, when the value of the restarted timer is greater than or equal to the duration of the TA valid timer (for example, 5 seconds), it may be determined that the value of the TA reacquired by the terminal device is in an invalid state.

It should be noted that the actual operation sequence of the method steps provided in the embodiments of the present application does not necessarily follow the order of the description.

By implementing the embodiment of the present application, the duration of the TA effective timer can be calculated according to the configuration parameters configured by the network device for calculating the duration of the uplink timing advance TA effective timer, and then the duration of the TA effective timer can be used Determining the effective time of the value of the TA can ensure effective uplink synchronization in the NTN network.

Optionally, the second scaling factor in the configuration parameters configured by the network device for the terminal device may have one or more values, and each value corresponds to a speed level of a terminal device, so that the terminal device can The speed can match the appropriate factor value from the second scaling factor, so that the factor value matched with its own moving speed can be used to calculate the duration of the TA effective timer, so that the calculation result can be more accurate for the movement of the video satellite and the terminal. Mobile conditions, thereby reducing the complexity of the terminal while maintaining effective uplink synchronization. Please refer to FIG. 3 . FIG. 3 is a flow chart of another method for determining the effective time of uplink timing advance in the non-terrestrial network NTN provided by the embodiment of the present application. It should be noted that the method for determining the effective time of the uplink timing advance in the non-terrestrial network NTN in the embodiment of the present application can be applied to a terminal device. As shown in FIG. 3 , the method for determining the effective time of the uplink timing advance in the non-terrestrial network NTN may include but not limited to the following steps.

Step 301, receiving configuration information of network device configuration.

In some embodiments, the configuration parameters may at least include but not limited to: a reference value of the timer duration; a first scaling factor related to satellite movement; one or more values of a second scaling factor related to the moving speed of the terminal equipment value etc. It can be understood that since both the satellite and the terminal equipment are moving, when determining the effective time of the uplink timing advance (TA), the moving speed of the satellite and the moving speed of the terminal equipment can be considered. A scaling factor, and set one or more values of the second scaling factor related to the mobile speed of the terminal equipment, and use the first scaling factor, the second scaling factor and the reference value of the timer duration to calculate the uplink timing advance amount (TA) the duration of the valid timer, so that the calculated uplink timing advance (TA) duration of the valid timer can more accurately adapt to the movement of the satellite and the movement of the terminal.

In the embodiment of the present application, the second scaling factor has one or more values, and each value corresponds to a speed level of a terminal device. For example, the second scaling factor can have 3 values, and each value corresponds to a speed grade of a terminal device, for example, value A corresponds to a low-speed grade, value B corresponds to a medium-speed grade, and value C corresponds to a high-speed grade. As an example, the moving speed of the terminal device may be graded; the speed range corresponding to the speed grade of the terminal device is regulated by a protocol, or the speed range corresponding to the speed grade of the terminal device is indicated by the network device through signaling.

Step 302, determine the level of the current moving speed of the terminal device.

Optionally, the terminal device may use its own GNSS (Global Navigation Satellite System, Global Navigation Satellite System) positioning system to determine the current moving speed of the terminal device, and determine the corresponding level based on the current moving speed. Alternatively, the terminal device may also use its own gyroscope to determine the current moving speed of the terminal device, and determine the corresponding level based on the current moving speed. It can be understood that in this embodiment of the present application, other methods may also be used to determine the current moving speed of the terminal device, which is not specifically limited in this application.

It can be understood that the moving speed of the terminal device can be graded; the speed range corresponding to the speed grade of the terminal device is specified by the protocol, or the speed range corresponding to the speed grade of the terminal device is indicated by the network device through signaling. Therefore, in the embodiment of the present application, after the current moving speed of the terminal device is determined, the level of the current moving speed of the terminal device may be determined based on the relationship between the speed level and the speed range.

Step 303: Determine the target factor value of the second scaling factor corresponding to the current moving speed level according to the current moving speed level of the terminal device.

In an implementation manner, after determining the level of the current moving speed of the terminal device, based on the correspondence between the value of the second scaling factor and the level of the moving speed of the terminal device, one of the second scaling factors may be selected from the configuration parameters. or multiple values to determine the target factor value of the second scaling factor corresponding to the current movement speed level. For example, the second scaling factor may have 3 values, and each value corresponds to a speed grade of a terminal device, for example, value A corresponds to a low-speed grade, value B corresponds to a medium-speed grade, and value C corresponds to a high-speed grade. The terminal device can determine the corresponding target factor value of the second scaling factor from these three values according to the level of its own current moving speed. For example, if the level of the current moving speed of the terminal device is a high-speed level, then the corresponding high-speed level C, the value C is used as the target factor value of the second scaling factor.

Step 304: Calculate the duration of the TA effective timer according to the reference value of the timer duration in the configuration parameters, the first scaling factor and the target factor value.

Optionally, after obtaining the target factor value of the second scaling factor corresponding to the current movement speed level, the calculation can be performed according to the target factor value, the reference value of the timer duration in the configuration parameter, and the first scaling factor in the configuration parameter Processing, the duration of the TA valid timer can be calculated.

It should be noted that there are many ways to calculate the duration of the TA effective timer in the embodiment of the present application. For example, the product algorithm can be used to calculate the duration of the TA effective timer, or addition can be used to calculate the TA effective timing The duration of the TA effective timer, or other calculation methods may also be used to calculate the duration of the TA valid timer, which is not specifically limited in this application. In order to facilitate the understanding of those skilled in the art, two possible implementation examples are given below to describe the calculation process of the duration of the TA valid timer.

As an example of a possible implementation manner, a product operation is performed on the reference value of the timer duration, the first scaling factor and the target factor value, and the duration of the TA valid timer is determined according to the obtained product value. For example, according to the reference value of the timer duration, the first scaling factor and the target factor value, the duration of the TA valid timer can be calculated by the following formula (1).

TA valid timer duration = based_Value*alpha_1*alpha_2 (1)

Among them, based_Value represents the reference value of the timer duration, alpha_1 represents the first scaling factor related to satellite movement, alpha_2 represents the target factor value of the second scaling factor related to the current moving speed of the terminal device, and * represents the product.

As an example of another possible implementation manner, an addition operation is performed on the reference value of the timer duration, the target factor values of the first scaling factor and the second scaling factor, and the duration of the TA valid timer is determined according to the obtained sum value. For example, the reference value of the timer duration, the first scaling factor, and the target factor value of the second scaling factor may be added, and the sum value may be obtained as the duration of the TA valid timer.

Step 305: Determine the valid time of the TA according to the duration of the TA valid timer.

By implementing the embodiment of the present application, the duration of the TA valid timer can be calculated according to the configuration parameters configured by the network equipment for calculating the duration of the uplink timing advance TA valid timer. The first scaling factor related to movement and the second scaling factor related to terminal equipment movement can make the effective time of the determined TA value more accurately adapt to the movement of the satellite and the movement of the terminal equipment, while maintaining effective uplink synchronization In this case, the complexity of the terminal equipment can be reduced.

It should be noted that the timing advance T _TA applied by NR (New Radio) NTN UE in RRC_IDLE (Radio Resource Control RRC idle state)/INACTIVE (RRC inactive state) and RRC_CONNECTED (RRC connected state) is as follows Equation (2) gives:

T _TA ＝(N _TA +N _{TA,UE-specific} +N _TA,common +N _TA,offset )×T _c (2)

Among them, N _TA means that PRACH (Physical Random Access Channel, physical random access channel) is defined as 0, and according to Msg2 (message 2 in the four-step random access process)/MsgB (message in the two-step random access process B) the TA command field and the MAC (media access control) CE (control element) TA command are updated;

N _{TA, UE-specific} indicates the TA estimated by the UE based on its own position and satellite position, corresponding to the round-trip delay from the UE to the satellite (service link);

N _{TA, common} represents the public TA controlled by the network, which is used to compensate the round-trip delay from the satellite to the ground station (feeder link);

N _{TA, offset} is a fixed offset value;

T _c is an absolute value unit of time.

It can be seen that N _{TA, UE-specific} is the round-trip delay of service link transmission, and the terminal device can be calculated according to its own GNSS positioning and satellite position (wherein, the satellite position can be obtained through calculation of ephemeris information). Among them, N _{TA, UE-specific} can be named as open-loop TA. As an example of a possible implementation manner, the method provided in the embodiment of the present application may be used to determine the valid time of the open-loop TA (that is, N _{TA, UE-specific} ) in the non-terrestrial network NTN. For example, the network device configures configuration parameters for the open-loop TA (that is, N _{TA, UE-specific} ) effective timer for the terminal device, where the configuration parameters may include a reference value of the timer, a satellite movement-related first One or more values of a scaling factor and a second scaling factor related to the moving speed of the terminal device, so that the terminal device can calculate the open-loop TA (ie N _{TA, UE-specific} ) according to the configuration parameters configured by the network device The duration of the valid timer, and then according to the duration of the valid timer of the open-loop TA (ie, N _{TA, UE-specific} ), determine the valid time of the value of the open-loop TA (ie, N _{TA, UE-specific} ).

It should be noted that N _TA in the above formula (2) can be understood as a closed-loop TA whose timing is advanced. As an example of a possible implementation manner, the method provided in the embodiment of the present application may be used to determine the valid time of the closed-loop TA (that is, N _TA ) in the non-terrestrial network NTN. For example, the network device configures configuration parameters for the effective timer of the closed-loop TA (ie N _TA ) for the terminal device, where the configuration parameters may include a reference value of the timer, a first scaling factor related to satellite movement, and One or more values of the second scaling factor related to the mobile speed of the terminal device, so that the terminal device can calculate the duration of the closed-loop TA (ie N _TA ) effective timer according to the configuration parameters configured by the network device, and then according to the The duration of the closed-loop TA (that is, N _TA ) valid timer is used to determine the valid time of the value of the closed-loop TA (that is, N _TA ). It should also be noted that the above formula (2) can be applied to any embodiment of the present application. That is to say, the implementation of determining the effective time of the uplink timing advance mentioned in any embodiment of the present application can be used to determine the value of the open-loop TA (ie N _{TA, UE-specific} ) in the above formula (2) The effective time, or, can also be used to determine the effective time of the value of the closed-loop TA (ie N _TA ) in the above formula (2), which is not specifically limited in this application.

It can be understood that the above-mentioned embodiment describes the implementation of the method for determining the effective time of the uplink timing advance in the non-terrestrial network NTN according to the embodiment of the present application from the side of the terminal device. The embodiment of the present application also proposes another method for determining the effective time of the uplink timing advance in the non-terrestrial network NTN. The effective time of the uplink timing advance in the non-terrestrial network NTN will be described below from the network equipment side The implementation of the determination method. Please refer to FIG. 4 . FIG. 4 is a flow chart of another method for determining the effective time of uplink timing advance in the non-terrestrial network NTN provided by the embodiment of the present application. It should be noted that the method for determining the effective time of the uplink timing advance in the non-terrestrial network NTN in the embodiment of the present application can be applied to network equipment. As shown in Fig. 4, the method for determining the effective time of the uplink timing advance in the non-terrestrial network NTN may include but not limited to the following steps.

Step 401, configuring configuration parameters used for calculating the duration of the uplink timing advance TA valid timer for the terminal device.

In some embodiments, the configuration parameters may at least include but not limited to: a reference value of the timer duration; a first scaling factor related to satellite movement; and one or more of a second scaling factor related to the moving speed of the terminal device. value etc.

As an example of a possible implementation manner, the configuration parameters may include a reference value of a timer duration; a first scaling factor related to satellite movement; and one or more values of a second scaling factor related to the moving speed of the terminal device. value. For example, the network device may configure the base value based_Value of the timer, and configure the first scaling factor alpha_1 according to the ephemeris information of the satellite, where it can be seen that the first scaling factor is related to satellite movement. The network device may also configure one or more values of the second scaling factor related to the moving speed of the terminal device.

Step 402, sending configuration parameters to the terminal device.

Optionally, the network device may send configuration parameters configured for the terminal device to the terminal device. The terminal device receives the configuration parameter configured by the network device, and the configuration parameter may include one or more of the reference value of the timer duration; the first scaling factor related to satellite movement; and the second scaling factor related to the terminal device's moving speed. value. The terminal device can calculate the duration of the TA valid timer according to the configuration parameter.

By implementing the embodiment of the present application, it is possible to configure the configuration parameters used for calculating the uplink timing advance TA effective timer duration for the terminal device, so that the terminal device can calculate the duration of the TA effective timer according to the configuration parameters, Furthermore, the valid time of the value of the TA is determined by using the duration of the TA valid timer, which can ensure effective uplink synchronization in the NTN network.

Optionally, the second scaling factor in the configuration parameters configured by the network device for the terminal device may have one or more values, and each value corresponds to a speed level of a terminal device, so that the terminal device can The speed can match the appropriate factor value from the second scaling factor, so that the factor value matched with its own moving speed can be used to calculate the duration of the TA effective timer, so that the calculation result can be more accurate for the movement of the video satellite and the terminal. Mobile conditions, thereby reducing the complexity of the terminal while maintaining effective uplink synchronization. Please refer to FIG. 5 . FIG. 5 is a flow chart of another method for determining the effective time of uplink timing advance in the non-terrestrial network NTN provided by the embodiment of the present application. It should be noted that the method for determining the effective time of the uplink timing advance in the non-terrestrial network NTN in the embodiment of the present application can be applied to network equipment. As shown in Fig. 5, the method for determining the effective time of the uplink timing advance in the non-terrestrial network NTN may include but not limited to the following steps.

Step 501, configure the configuration parameters used for calculating the duration of the uplink timing advance TA effective timer for the terminal equipment, wherein the configuration parameters include the reference value of the timer duration; the first scaling factor related to satellite movement; and One or more values of the second scaling factor related to the moving speed of the terminal device. The second scaling factor may have one or more values, and each value corresponds to a speed level of a terminal device.

For example, the network device may configure the base value based_Value of the timer, and configure the first scaling factor alpha_1 according to the ephemeris information of the satellite, where it can be seen that the first scaling factor is related to satellite movement. The network device can also configure one or more values of the second scaling factor related to the mobile speed of the terminal device. For example, different factor values can be configured for different UE mobility levels. It can be seen that the second scaling factor can have One or more values, each corresponding to a speed class of the terminal device. For example, the speed grade can be divided into three grades (such as low speed, medium speed, and high speed), and a corresponding factor value is configured for each grade.

Step 502, sending configuration parameters to the terminal device.

Optionally, the network device may send configuration parameters configured for the terminal device to the terminal device. The terminal device receives the configuration parameter configured by the network device, and the configuration parameter may include one or more of the reference value of the timer duration; the first scaling factor related to satellite movement; and the second scaling factor related to the terminal device's moving speed. The second scaling factor may have one or more values, and each value corresponds to a speed level of a terminal device. The terminal device can calculate the duration of the TA valid timer according to the configuration parameter.

Optionally, the second scaling factor in the configuration parameters configured by the network device for the terminal device may have one or more values, and each value corresponds to a speed level of a terminal device, so that the terminal device can The speed can match the appropriate factor value from the second scaling factor, so that the factor value matched with its own moving speed can be used to calculate the duration of the TA effective timer, so that the calculation result can be more accurate for the movement of the video satellite and the terminal. Mobile conditions, thereby reducing the complexity of the terminal while maintaining effective uplink synchronization.

In the embodiment of the present application, the second scaling factor has one or more values, and each value corresponds to a speed level of a terminal device. For example, the second scaling factor may have 3 values, and each value corresponds to a speed grade of a terminal device, for example, value A corresponds to a low-speed grade, value B corresponds to a medium-speed grade, and value C corresponds to a high-speed grade. As an example, the moving speed of the terminal device may be graded; the speed range corresponding to the speed grade of the terminal device is regulated by a protocol, or the speed range corresponding to the speed grade of the terminal device is indicated by the network device through signaling.

As an example of a possible implementation, the terminal device can determine its own current moving speed level, and based on the correspondence between the value of the second scaling factor and the moving speed level of the terminal device, the second scaling factor can be obtained from the configuration parameters Determine the target factor value of the second scaling factor corresponding to the current movement speed level from one or more values of value, calculate the duration of the TA valid timer, and then determine the valid time of the TA according to the duration of the TA valid timer.

Optionally, after the terminal device obtains the target factor value of the second scaling factor corresponding to the current moving speed level, it can By performing calculation processing, the duration of the TA valid timer can be calculated.

It should be noted that there are many ways to calculate the duration of the TA effective timer in the embodiment of the present application. For example, the terminal device can use the product algorithm to calculate the duration of the TA effective timer, or it can also use addition to calculate the duration of the TA The duration of the valid timer, or other calculation methods may also be used to calculate the duration of the TA valid timer, which is not specifically limited in this application. In order to facilitate the understanding of those skilled in the art, two possible implementation examples are given below to describe the calculation process of the duration of the TA valid timer.

As an example of a possible implementation manner, the terminal device performs a product operation on the reference value of the timer duration, the first scaling factor and the target factor value, and determines the duration of the TA valid timer according to the obtained product value. For example, the terminal device may calculate the duration of the TA effective timer according to the reference value of the timer duration, the first scaling factor and the target factor value by using the following formula (1).

TA valid timer duration = based_Value*alpha_1*alpha_2 (1)

Wherein, based_Value represents the reference value of the timer duration, alpha_1 represents the first scaling factor related to satellite movement, alpha_2 represents the target factor value of the second scaling factor related to the current moving speed of the terminal device, and * represents the product.

As an example of another possible implementation manner, the terminal device performs an addition operation on the reference value of the timer duration, the first scaling factor and the target factor value, and determines the duration of the TA valid timer according to the obtained sum value. For example, the terminal device may add the reference value of the timer duration, the first scaling factor and the target factor value, and use the sum value as the duration of the TA valid timer.

Optionally, when the terminal device calculates the duration of the TA valid timer, it may determine the valid duration of the TA value according to the duration of the TA valid timer, that is, determine the valid duration of the TA value acquired by the terminal device.

By implementing the embodiment of the present application, by configuring the configuration parameters used for calculating the uplink timing advance TA valid timer duration for the terminal device, so that the terminal device can calculate the duration of the TA valid timer according to the configuration parameters, because The configuration parameters include at least the first scaling factor related to satellite movement and the second scaling factor related to terminal equipment movement, which can make the effective time of the determined TA value more accurately adapt to the movement of the satellite and the movement of the terminal equipment , in the case of maintaining effective uplink synchronization, the complexity of the terminal equipment can be reduced.

In the above-mentioned embodiments provided in the present application, the methods provided in the embodiments of the present application are introduced from the perspectives of the terminal device and the network device respectively. In order to realize the various functions in the method provided by the above embodiments of the present application, the terminal device and the network device may include a hardware structure and a software module, and implement the above functions in the form of a hardware structure, a software module, or a hardware structure plus a software module. A certain function among the above-mentioned functions may be implemented in the form of a hardware structure, a software module, or a hardware structure plus a software module.

Please refer to FIG. 6 , which is a schematic structural diagram of a communication device 60 provided in an embodiment of the present application. The communication device 60 shown in FIG. 6 may include a transceiver module 601 and a processing module 602 . The transceiver module 601 may include a sending module and/or a receiving module, the sending module is used to realize the sending function, the receiving module is used to realize the receiving function, and the sending and receiving module 601 can realize the sending function and/or the receiving function.

The communication device 60 may be a terminal device, may also be a device in the terminal device, and may also be a device that can be matched and used with the terminal device. Alternatively, the communication device 60 may be a network device, or a device in the network device, or a device that can be matched with the network device.

The communication device 60 is a terminal device: in the embodiment of this application, the transceiver module 601 is used to receive the configuration information configured by the network device; the configuration information includes at least the time period used by the terminal device to calculate the uplink timing advance amount TA valid timer duration. Configuration parameters; the processing module 602 is configured to calculate the duration of the TA valid timer according to the configuration parameters, and determine the valid time of the TA according to the duration of the TA valid timer.

In an implementation manner, the configuration parameters at least include: a reference value of the timer duration; a first scaling factor related to satellite movement; and one or more values of a second scaling factor related to the moving speed of the terminal device.

In a possible implementation manner, the second scaling factor includes at least one speed level and a factor value corresponding to each speed level; the processing module 602 is configured to: determine the level of the current moving speed of the terminal device; Determine the target factor value of the second scaling factor corresponding to the current moving speed level; calculate the duration of the TA effective timer according to the reference value of the timer duration, the first scaling factor and the target factor value.

In a possible implementation manner, the mobile speed of the terminal equipment can be graded; the speed range corresponding to the speed grade of the terminal equipment is stipulated by the protocol, or the speed range corresponding to the speed grade of the terminal equipment is determined by the network device through signaling to give instructions.

In a possible implementation manner, the processing module 602 is configured to: perform a product operation on the reference value of the timer duration, the first scaling factor and the target factor value, and determine the duration of the TA effective timer according to the obtained product value.

In one implementation, the processing module 602 is configured to: start a timer of the TA when acquiring the TA for the first time; and determine that the value of the TA is within the valid time in response to the value of the timer of the TA being less than the duration of the valid timer of the TA.

In one implementation manner, the processing module 602 is configured to: when reacquiring the TA, restart the timer of the TA; in response to the value of the timer of the TA being less than the duration of the valid timer of the TA, determine that the value of the TA is within the valid time.

In a possible implementation manner, the processing module 602 is further configured to: determine that the value of the TA is in an invalid state in response to the value of the timer of the TA being greater than or equal to the duration of the valid timer of the TA.

The communication device 60 is a network device: in the embodiment of this application, the processing module 602 is used to configure the configuration parameters used for calculating the uplink timing advance TA effective timer duration for the terminal device; the transceiver module 601 is used to send the terminal device Send configuration parameters.

Regarding the apparatus in the foregoing embodiments, the specific manner in which each module executes operations has been described in detail in the embodiments related to the method, and will not be described in detail here.

Please refer to FIG. 7 . FIG. 7 is a schematic structural diagram of another communication device 70 provided in an embodiment of the present application. The communication device 70 may be a network device, may also be a terminal device, may also be a chip, a chip system, or a processor that supports the network device to implement the above method, or may be a chip, a chip system, or a chip that supports the terminal device to implement the above method. processor etc. The device can be used to implement the methods described in the above method embodiments, and for details, refer to the descriptions in the above method embodiments.

Communications device 70 may include one or more processors 701 . The processor 701 may be a general-purpose processor or a special-purpose processor or the like. For example, it can be a baseband processor or a central processing unit. The baseband processor can be used to process communication protocols and communication data, and the central processing unit can be used to control communication devices (such as base stations, baseband chips, terminal equipment, terminal equipment chips, DU or CU, etc.) and execute computer programs , to process data for computer programs.

Optionally, the communication device 70 may further include one or more memories 702, on which a computer program 704 may be stored, and the processor 701 executes the computer program 704, so that the communication device 70 executes the method described in the above method embodiment. method. Optionally, data may also be stored in the memory 702 . The communication device 70 and the memory 702 can be set separately or integrated together.

Optionally, the communication device 70 may further include a transceiver 705 and an antenna 706 . The transceiver 705 may be called a transceiver unit, a transceiver, or a transceiver circuit, etc., and is used to implement a transceiver function. The transceiver 705 may include a receiver and a transmitter, and the receiver may be called a receiver or a receiving circuit for realizing a receiving function; the transmitter may be called a transmitter or a sending circuit for realizing a sending function.

Optionally, the communication device 70 may further include one or more interface circuits 707 . The interface circuit 707 is used to receive code instructions and transmit them to the processor 701 . The processor 701 executes the code instructions to enable the communication device 70 to execute the methods described in the foregoing method embodiments.

The communication device 70 is a terminal device: the processor 701 is used for step 202 and step 203 in FIG. 2 ; and executes step 302 , step 303 , step 304 , step 305 and step 306 in FIG. 3 . The transceiver 705 is used to execute step 201 in FIG. 2 ; and execute step 301 in FIG. 3 .

The communication device 70 is a network device: the processor 701 is used for step 401 in FIG. 4 and step 501 in FIG. 5 . The transceiver 705 is used to execute step 402 in FIG. 4 and step 502 in FIG. 5 .

In an implementation manner, the processor 701 may include a transceiver for implementing receiving and sending functions. For example, the transceiver may be a transceiver circuit, or an interface, or an interface circuit. The transceiver circuits, interfaces or interface circuits for realizing the functions of receiving and sending can be separated or integrated together. The above-mentioned transceiver circuit, interface or interface circuit may be used for reading and writing code/data, or the above-mentioned transceiver circuit, interface or interface circuit may be used for signal transmission or transmission.

In an implementation manner, the processor 701 may store a computer program 703 , and the computer program 703 runs on the processor 701 to enable the communication device 70 to execute the methods described in the foregoing method embodiments. The computer program 703 may be solidified in the processor 701, and in this case, the processor 701 may be implemented by hardware.

In an implementation manner, the communication device 70 may include a circuit, and the circuit may implement the function of sending or receiving or communicating in the foregoing method embodiments. The processors and transceivers described in this application can be implemented in integrated circuits (integrated circuits, ICs), analog ICs, radio frequency integrated circuits (RFICs), mixed-signal ICs, application specific integrated circuits (ASICs), printed circuit boards ( printed circuit board, PCB), electronic equipment, etc. The processor and transceiver can also be fabricated using various IC process technologies, such as complementary metal oxide semiconductor (CMOS), nMetal-oxide-semiconductor (NMOS), P-type Metal oxide semiconductor (positive channel metal oxide semiconductor, PMOS), bipolar junction transistor (bipolar junction transistor, BJT), bipolar CMOS (BiCMOS), silicon germanium (SiGe), gallium arsenide (GaAs), etc.

The communication device described in the above embodiments may be a network device or a terminal device (such as the first terminal device in the foregoing method embodiments), but the scope of the communication device described in this application is not limited thereto, and the structure of the communication device can be Not limited by Figure 7. A communication device may be a stand-alone device or may be part of a larger device. For example the communication device may be:

(1) Stand-alone integrated circuits ICs, or chips, or chip systems or subsystems;

(2) A set of one or more ICs, optionally, the set of ICs may also include storage components for storing data and computer programs;

(3) ASIC, such as modem (Modem);

(4) Modules that can be embedded in other devices;

(5) Receivers, terminal equipment, intelligent terminal equipment, cellular phones, wireless equipment, handsets, mobile units, vehicle equipment, network equipment, cloud equipment, artificial intelligence equipment, etc.;

(6) Others and so on.

Those skilled in the art can also understand that various illustrative logical blocks and steps listed in the embodiments of the present application can be implemented by electronic hardware, computer software, or a combination of both. Whether such functions are implemented by hardware or software depends on the specific application and overall system design requirements. Those skilled in the art may use various methods to implement the described functions for each specific application, but such implementation should not be understood as exceeding the protection scope of the embodiments of the present application.

The embodiment of the present application also provides a system for determining the duration of the side link. The system includes the communication device as the terminal device and the communication device as the network device in the aforementioned embodiment in FIG. A communication device as a terminal device and a communication device as a network device.

The present application also provides a readable storage medium on which instructions are stored, and when the instructions are executed by a computer, the functions of any one of the above method embodiments are realized.

The present application also provides a computer program product, which implements the functions of any one of the above method embodiments when executed by a computer.

In the above embodiments, all or part of them may be implemented by software, hardware, firmware or any combination thereof. When implemented using software, it may be implemented in whole or in part in the form of a computer program product. The computer program product comprises one or more computer programs. When the computer program is loaded and executed on the computer, all or part of the processes or functions according to the embodiments of the present application will be generated. The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable devices. The computer program can be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer program can be downloaded from a website, computer, server or data center Transmission to another website site, computer, server or data center by wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be accessed by a computer, or a data storage device including a server, a data center, and the like integrated with one or more available media. The available medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a high-density digital video disc (digital video disc, DVD)), or a semiconductor medium (for example, a solid state disk (solid state disk, SSD)) etc.

Those of ordinary skill in the art can understand that: the first, second and other numbers involved in this application are only for convenience of description, and are not used to limit the scope of the embodiments of this application, and also indicate the sequence.

At least one in this application can also be described as one or more, and multiple can be two, three, four or more, and this application does not make a limitation. In this embodiment of the application, for a technical feature, the technical feature is distinguished by "first", "second", "third", "A", "B", "C" and "D", etc. The technical features described in the "first", "second", "third", "A", "B", "C" and "D" have no sequence or order of magnitude among the technical features described.

The corresponding relationships shown in the tables in this application can be configured or predefined. The values of the information in each table are just examples, and may be configured as other values, which are not limited in this application. When configuring the corresponding relationship between the information and each parameter, it is not necessarily required to configure all the corresponding relationships shown in the tables. For example, in the table in this application, the corresponding relationship shown in some rows may not be configured. For another example, appropriate deformation adjustments can be made based on the above table, for example, splitting, merging, and so on. The names of the parameters shown in the titles of the above tables may also adopt other names understandable by the communication device, and the values or representations of the parameters may also be other values or representations understandable by the communication device. When the above tables are implemented, other data structures can also be used, for example, arrays, queues, containers, stacks, linear tables, pointers, linked lists, trees, graphs, structures, classes, heaps, hash tables or hash tables can be used wait.

Predefined in this application can be understood as defining, predefining, storing, prestoring, prenegotiating, preconfiguring, curing, or prefiring.

Those skilled in the art can appreciate that the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present application.

Those skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the above-described system, device and unit can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

The above is only a specific implementation of the application, but the scope of protection of the application is not limited thereto. Anyone familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the application. Should be covered within the protection scope of this application. Therefore, the protection scope of the present application should be determined by the protection scope of the claims.

Claims

A method for determining the effective time of an uplink timing advance in a non-terrestrial network NTN, characterized in that the method is executed by a terminal device, and the method includes:

receiving configuration information configured by the network device; the configuration information at least includes the configuration parameters used by the terminal device to calculate the duration of the uplink timing advance TA valid timer;

calculating the duration of the TA valid timer according to the configuration parameters;

Determine the valid time of the TA according to the duration of the TA valid timer.
The method according to claim 1, wherein the configuration parameters at least include:

The baseline value of the timer duration;

a first scaling factor related to satellite movement;

One or more values of the second scaling factor related to the moving speed of the terminal device.
The method according to claim 2, wherein the second scaling factor has one or more values, and each value corresponds to a speed level of a terminal device; said calculating said The duration of the TA valid timer, including:

determining the level of the current movement speed of the terminal device;

determining a target factor value of a second scaling factor corresponding to the current moving speed level according to the current moving speed level of the terminal device;

Calculate the duration of the TA valid timer according to the reference value of the timer duration, the first scaling factor, and the target factor value.
The method according to claim 3, characterized in that the moving speed of the terminal equipment is graded; the speed range corresponding to the speed grade of the terminal equipment is stipulated by the agreement, or the speed range corresponding to the speed grade of the terminal equipment is determined by Network devices indicate this through signaling.
The method according to claim 3, wherein the calculating the duration of the TA effective timer according to the reference value of the timer duration, the first scaling factor and the target factor value includes:

Perform a product operation on the reference value of the timer duration, the first scaling factor and the target factor value, and determine the duration of the TA valid timer according to the obtained product value.
The method according to any one of claims 1 to 5, wherein the determining the valid time of the TA according to the duration of the TA valid timer includes:

When acquiring the TA for the first time, start a timer of the TA;

In response to the value of the timer of the TA being less than the duration of the TA valid timer, it is determined that the value of the TA is within the valid time.
The method according to any one of claims 1 to 5, wherein the determining the valid time of the TA according to the duration of the TA valid timer includes:

When reacquiring the TA, restarting the timer of the TA;

In response to the value of the TA timer being less than the duration of the TA valid timer, it is determined that the value of the TA is within the valid time.
The method according to claim 6 or 7, wherein the determining the valid time of the TA according to the duration of the TA valid timer further includes:

In response to the value of the timer of the TA being greater than or equal to the duration of the valid timer of the TA, it is determined that the value of the TA is in an invalid state.
A method for determining the effective time of an uplink timing advance in a non-terrestrial network NTN, wherein the method is performed by a network device, and the method includes:

Configure the configuration parameters used for calculating the duration of the uplink timing advance TA effective timer for the terminal device;

Send the configuration parameters to the terminal device.
The method according to claim 9, wherein the configuration parameters at least include:

The baseline value of the timer duration;

a first scaling factor related to satellite movement;

One or more values of the second scaling factor related to the moving speed of the terminal device.
The method according to claim 9, wherein the second scaling factor has one or more values, and each value corresponds to a speed level of a terminal device.
The method according to claim 10, characterized in that the moving speed of the terminal equipment is graded; the speed range corresponding to the speed grade of the terminal equipment is stipulated by the agreement, or the speed range corresponding to the speed grade of the terminal equipment is determined by Network devices indicate this through signaling.
A communication device, characterized by comprising:

A transceiver module, the transceiver module is used to receive configuration information configured by the network device; the configuration information includes at least the configuration parameters used by the terminal device to calculate the duration of the uplink timing advance TA effective timer;

A processing module, the processing module is configured to calculate the duration of the TA valid timer according to the configuration parameters, and determine the valid time of the TA according to the duration of the TA valid timer.
The communication device according to claim 13, wherein the configuration parameters at least include:

The baseline value of the timer duration;

a first scaling factor related to satellite movement;

One or more values of the second scaling factor related to the moving speed of the terminal device.
The communication device according to claim 14, wherein the second scaling factor has one or more values, and each value corresponds to a speed level of a terminal device; the processing module is used for:

determining the level of the current movement speed of the terminal device;

determining a target factor value of a second scaling factor corresponding to the current moving speed level according to the current moving speed level of the terminal device;

Calculate the duration of the TA valid timer according to the reference value of the timer duration, the first scaling factor, and the target factor value.
The communication device according to claim 15, wherein the moving speed of the terminal equipment is graded; the speed range corresponding to the speed grade of the terminal equipment is stipulated by the agreement, or the speed range corresponding to the speed grade of the terminal equipment Indicated by the network device through signaling.
The communication device according to claim 15, wherein the processing module is used for:

Perform a product operation on the reference value of the timer duration, the first scaling factor and the target factor value, and determine the duration of the TA valid timer according to the obtained product value.
The communication device according to any one of claims 13 to 17, wherein the processing module is used for:

When acquiring the TA for the first time, start a timer of the TA;

In response to the value of the TA timer being less than the duration of the TA valid timer, it is determined that the value of the TA is within the valid time.
The communication device according to any one of claims 13 to 17, wherein the processing module is used for:

When reacquiring the TA, restarting the timer of the TA;

In response to the value of the TA timer being less than the duration of the TA valid timer, it is determined that the value of the TA is within the valid time.
The communication device according to claim 18 or 19, wherein the processing module is further used for:

In response to the value of the timer of the TA being greater than or equal to the duration of the valid timer of the TA, it is determined that the value of the TA is in an invalid state.
A communication device, characterized by comprising:

A processing module, the processing module is used to configure the configuration parameters used for calculating the duration of the uplink timing advance TA valid timer for the terminal device;

A transceiver module, configured to send the configuration parameters to the terminal device.
The communication device according to claim 21, wherein the configuration parameters at least include:

The baseline value of the timer duration;

a first scaling factor related to satellite movement;

One or more values of the second scaling factor related to the moving speed of the terminal device.
The communication device according to claim 22, wherein the second scaling factor has one or more values, and each value corresponds to a speed level of a terminal device.
The communication device according to claim 23, wherein the moving speed of the terminal equipment is graded; the speed range corresponding to the speed grade of the terminal equipment is stipulated by the agreement, or the speed range corresponding to the speed grade of the terminal equipment Indicated by the network device through signaling.
A communication device, characterized in that the device includes a processor and a memory, and a computer program is stored in the memory, and the processor executes the computer program stored in the memory, so that the device performs the The method described in any one of 1 to 8.
A communication device, characterized in that the device includes a processor and a memory, and a computer program is stored in the memory, and the processor executes the computer program stored in the memory, so that the device performs the The method described in any one of 9-12.
A computer-readable storage medium is used for storing instructions, and when the instructions are executed, the method according to any one of claims 1-8 is realized.
A computer-readable storage medium for storing instructions, which, when executed, cause the method according to any one of claims 9-12 to be implemented.