CN115915187A

CN115915187A - Data transmission method and related device

Info

Publication number: CN115915187A
Application number: CN202110945420.7A
Authority: CN
Inventors: 雷珍珠
Original assignee: Spreadtrum Semiconductor Nanjing Co Ltd
Current assignee: Spreadtrum Semiconductor Nanjing Co Ltd
Priority date: 2021-08-17
Filing date: 2021-08-17
Publication date: 2023-04-04
Also published as: WO2023020352A1

Abstract

The application discloses a data transmission method and a related device, and relates to the technical field of wireless communication. The data transmission method comprises the following steps: and acquiring a scheduling delay value, and performing uplink data transmission with the first network equipment according to the scheduling delay value. The scheduling delay value is determined according to the first delay value, or the scheduling delay value is determined according to the first delay value and the second delay value; the first time delay value is the round-trip transmission time delay value from the satellite corresponding to the first cell to the reference point in the coverage area of the second cell, the second time delay value is not less than the public timing advance value broadcasted by the first cell, and the coverage area of the second cell is overlapped with the coverage area of the first cell. The scheduling delay value obtained by the method has higher precision, and the data transmission delay of the terminal equipment can be greatly reduced.

Description

Data transmission method and related device

Technical Field

The present application relates to the field of wireless communications technologies, and in particular, to a data transmission method and a related apparatus.

Background

In a current non-terrestrial network (NTN), it is assumed that a terminal device has a Global Navigation Satellite System (GNSS) positioning capability, that is, the terminal device may calculate round-trip transmission time delay (RTT) between the terminal device and a service satellite according to ephemeris information and self position information obtained by using the GNSS, further determine a Timing Advance (TA) value sent by the terminal device in an uplink direction, report the self position information or the TA value sent in the uplink direction to the network device, and further determine a scheduling delay value when the terminal device performs data transmission according to the scheduling delay value indicated by the network device, so as to complete uplink data transmission of the terminal device.

However, in a Non-GNSS scenario, a terminal device does not have GNSS capability, and cannot report its own location information or a TA value sent uplink to a network device, so that a network cannot accurately determine a scheduling delay value when the terminal device performs data transmission. In this case, in order to ensure the reliability of data transmission, the network performs data scheduling by using a relatively large scheduling delay value, which increases the data transmission delay of the terminal device.

Disclosure of Invention

The embodiment of the application provides a data transmission method and a related device, uplink data transmission is performed with a first network device according to an obtained scheduling delay value, wherein the scheduling delay value determined according to a first delay value or according to the first delay value and a second delay value has higher precision, and the time delay of data transmission of a terminal device can be greatly reduced.

In a first aspect, an embodiment of the present application provides a data transmission method, which is applied to a terminal device, and the method includes:

acquiring a scheduling delay value; the scheduling delay value is determined according to the first delay value, or the scheduling delay value is determined according to the first delay value and the second delay value; the first time delay value is a round-trip transmission time delay value from a satellite corresponding to a first cell to a reference point in a coverage area of a second cell, the second time delay value is not less than a common timing advance value broadcasted by the first cell, and the coverage area of the second cell is overlapped with the coverage area of the first cell;

and carrying out uplink data transmission with the first network equipment according to the scheduling delay value.

In the embodiment of the application, a data transmission method applied to a terminal device side is provided, in which the terminal device first obtains a scheduling delay value, and then performs uplink data transmission with a first network device according to the scheduling delay value. The first network device is a network device corresponding to a first cell, such as a network device like a first cell base station, where a coverage area of the first cell overlaps a coverage area of a second cell, specifically, the coverage area of the first cell overlaps the coverage area of the second cell, or the coverage area of the first cell completely includes the coverage area of the second cell, and the terminal device may be located in the overlapping portion of the coverage areas of the first cell and the second cell. The obtained scheduling delay value is determined by a first delay value, or the first delay value and a second delay value, wherein the first delay value is a round-trip transmission delay value from a satellite corresponding to the first cell to a reference point in a coverage area of the second cell, and the second delay value is not less than a public timing advance value broadcasted by the first cell. According to the embodiment of the application, the obtained scheduling delay value is used for the delay of uplink data transmission with the first network equipment, wherein the accuracy of the scheduling delay value determined by the first delay value or the first delay value and the second delay value is higher, and the delay of data transmission of the terminal equipment can be greatly reduced.

In one possible implementation, the obtaining the scheduling delay value includes:

receiving the scheduling delay value from the first network device or a second network device, where the first network device is a network device corresponding to the first cell, and the second network device is a network device corresponding to the second cell.

In the embodiment of the present application, a possible specific implementation manner for obtaining a scheduling delay value is provided, specifically, a terminal device receives the scheduling delay value from a first network device or a second network device. The scheduling delay value obtained by the embodiment of the application has higher precision, and the time delay of data transmission of the terminal equipment can be greatly reduced.

In one possible embodiment, the method further comprises:

receiving the first delay value from the first network device or the second network device, where the first network device is a network device corresponding to the first cell, and the second network device is a network device corresponding to the second cell;

the obtaining of the scheduling delay value includes:

and determining the scheduling delay value according to the first delay value and the second delay value.

In this embodiment, another possible specific implementation manner for obtaining the scheduling delay value is provided, specifically, the terminal device receives the first delay value from the first network device or the second network device, and then determines the scheduling delay value according to the first delay value and the second delay value, where the scheduling delay value is used for data transmission between the terminal device and the first network device. According to the embodiment of the application, the scheduling delay value determined by the first delay value and the second delay value has higher precision, and the data transmission delay of the terminal equipment can be greatly reduced.

In a possible implementation, the scheduling delay value is a sum of the first delay value and the second delay value.

In this embodiment of the present application, the scheduling delay value is determined by a first delay value and a second delay value, and may specifically be a sum of the first delay value and the second delay value. The scheduling delay value obtained by the embodiment of the application has higher precision, is used for data transmission of the terminal equipment, and can greatly reduce the delay of the data transmission of the terminal equipment.

In one possible embodiment, the method further comprises:

and acquiring the second time delay value through the broadcast message corresponding to the first cell.

In this embodiment of the present application, the second delay value is obtained by receiving a broadcast message corresponding to the first cell, where the second delay value is not smaller than the common timing advance value broadcasted by the first cell, and specifically, the second delay value may be the common timing advance value broadcasted by the first cell. The second time delay value obtained by the embodiment of the application can enable the scheduling time delay value determined based on the first time delay value and the second time delay value to be more accurate, and can greatly reduce the time delay of data transmission of the terminal equipment.

In a possible implementation, the first delay value is determined according to the position information of the coverage area of the second cell and the position information of the satellite corresponding to the first cell.

In this embodiment of the present application, the first delay value is determined by the location information of the coverage area of the second cell and the location information of the satellite corresponding to the first cell, where the first delay value is a round-trip transmission delay value from the satellite corresponding to the first cell to a reference point in the coverage area of the second cell. By the first time delay value obtained by the embodiment of the application, the scheduling time delay value determined based on the first time delay value and the second time delay value can be more accurate, and the time delay of data transmission of the terminal equipment can be greatly reduced.

In a possible implementation manner, the performing, according to the scheduling delay value, uplink data transmission with a first network device includes:

and determining the time domain position of the uplink transmission resource according to the scheduling delay value, and sending uplink data to the first network equipment at the time domain position of the uplink transmission resource.

In the embodiment of the present application, a possible specific implementation manner of performing uplink data transmission with a first network device according to a scheduling delay value is provided, specifically, a terminal device determines an uplink transmission resource time domain position according to the scheduling delay value, and sends uplink data to the first network device at the uplink transmission resource time domain position, so that a delay of data transmission of the terminal device is greatly reduced.

In a possible embodiment, the reference point is a point farthest from the satellite corresponding to the first cell to the coverage area of the second cell.

In one possible embodiment, the satellite corresponding to the first cell is in the same satellite orbit as the satellite corresponding to the second cell, or in a different satellite orbit.

In a second aspect, an embodiment of the present application provides a data transmission method, which is applied to a first network device, and includes:

determining a scheduling delay value according to a first delay value or according to the first delay value and a second delay value, wherein the scheduling delay value is used for scheduling uplink data; the first network device is a network device corresponding to a first cell, the first delay value is a round-trip transmission delay value from a satellite corresponding to the first cell to a reference point in a coverage area of a second cell, the second delay value is not less than a common timing advance value broadcasted by the first cell, and the coverage area of the second cell is overlapped with the coverage area of the first cell; sending the scheduling delay value to terminal equipment;

or,

sending a first time delay value to terminal equipment, wherein the first time delay value is a round-trip transmission time delay value from a satellite corresponding to a first cell to a reference point in a coverage area of a second cell, the first time delay value is used for determining a scheduling time delay value, the scheduling time delay value is used for scheduling uplink data, and the coverage area of the second cell is overlapped with the coverage area of the first cell.

In the embodiment of the present application, a data transmission method applied to a first network device side is provided, where the first network device determines a scheduling delay value according to a first delay value, or according to the first delay value and a second delay value, and then sends the scheduling delay value to a terminal device. The first network device is a network device corresponding to a first cell, for example, a network device such as a first cell base station, and the terminal device is a device for establishing dual connectivity between the first cell and a second cell, where a coverage area of the first cell overlaps a coverage area of the second cell, specifically, the coverage area of the first cell overlaps the coverage area of the second cell, or the coverage area of the first cell completely includes the coverage area of the second cell, and the terminal device may be located in an overlapping portion of the coverage areas of the first cell and the second cell. The first time delay value is a round-trip transmission time delay value from a satellite corresponding to the first cell to a reference point in a coverage area of a second cell, the second time delay value is not less than a public timing advance value broadcasted by the first cell, and the determined scheduling time delay value is a time delay value for uplink data transmission between the terminal equipment and the first network equipment. Or the first network equipment sends the first time delay value to the terminal equipment. By the embodiment of the application, the scheduling delay value or the first delay value sent to the terminal equipment has higher precision, and the data transmission delay of the terminal equipment can be greatly reduced.

In one possible embodiment, the method further comprises:

receiving the position information of the coverage area of the second cell sent by second network equipment; the second network equipment is network equipment corresponding to the second cell;

and determining the first time delay value according to the position information of the coverage area of the second cell and the position information of the satellite corresponding to the first cell.

In this embodiment, a possible specific implementation manner of determining the first delay value is further provided, and specifically, the first network device receives location information of a coverage area of a second cell sent by the second network device, and then determines the first delay value according to the location information of the coverage area of the second cell and location information of a satellite corresponding to the first cell. The first time delay value obtained by the embodiment of the application has higher precision of the determined scheduling time delay value, and the time delay of data transmission of the terminal equipment can be greatly reduced.

In one possible embodiment, the method further comprises:

In a possible implementation, the determining a scheduling delay value according to the first delay value or according to the first delay value and the second delay value includes:

taking the first delay value as the scheduling delay value;

or, the sum of the first delay value and the second delay value is used as the scheduling delay value.

In the embodiment of the present application, a possible specific implementation manner of determining a scheduling delay value is provided, specifically, a first delay value is determined as the scheduling delay value, or a sum of the first delay value and a second delay value is determined as the scheduling delay value. According to the embodiment of the application, the determined scheduling delay value has higher precision based on the first delay value or the first delay value and the second delay value, and the data transmission delay of the terminal equipment can be greatly reduced.

In a possible implementation, the sending the scheduling delay value to the terminal device includes:

and sending a radio resource control signaling or a media access layer control signaling to the terminal equipment, wherein the radio resource control signaling or the media access layer control signaling is used for indicating the scheduling delay value to the terminal equipment.

In the embodiment of the present application, a possible specific implementation manner for sending a scheduling delay value to a terminal device is provided, and specifically, a radio resource control signaling or a media access layer control signaling is sent to the terminal device, where the radio resource control signaling or the media access layer control signaling is used to indicate the scheduling delay value determined by a first network device to the terminal device. By the embodiment of the application, the scheduling delay value sent to the terminal equipment has higher precision, and the data transmission delay of the terminal equipment can be greatly reduced.

In a third aspect, an embodiment of the present application provides a data transmission method, which is applied to a second network device, and the method includes:

determining a scheduling delay value according to a first delay value or according to the first delay value and a second delay value, wherein the first delay value is a round-trip transmission delay value from a satellite corresponding to a first cell to a reference point in a coverage area of a second cell, the second delay value is not less than a common timing advance value broadcasted by the first cell, and the coverage area of the second cell is overlapped with the coverage area of the first cell; sending the scheduling delay value to terminal equipment, wherein the scheduling delay value is used for scheduling uplink data;

or,

sending a first time delay value to terminal equipment, wherein the first time delay value is a round-trip transmission time delay value from a satellite corresponding to a first cell to a reference point in a coverage area of a second cell, the first time delay value is used for determining a scheduling time delay value, the scheduling time delay value is used for scheduling uplink data, and the coverage area of the second cell is overlapped with the coverage area of the first cell;

or,

sending the position information of the coverage area of the second cell to the first network equipment; the first network device is a network device corresponding to a first cell, a coverage area of the second cell overlaps with a coverage area of the first cell, position information of the coverage area of the second cell is used for determining a first delay value, and the first delay value is a round-trip transmission delay value from a satellite corresponding to the first cell to a reference point in the coverage area of the second cell.

In the embodiment of the present application, a data transmission method applied to a second network device side is provided, where the second network device determines a scheduling delay value according to a first delay value, or according to the first delay value and a second delay value, and then sends the scheduling delay value to a terminal device. The second network device is a network device corresponding to the second cell, such as a second cell base station and other network devices, the terminal device is a device for establishing dual connectivity between the first cell and the second cell, a coverage area of the first cell overlaps a coverage area of the second cell, specifically, a coverage area of the first cell partially overlaps a coverage area of the second cell, or the coverage area of the first cell completely includes a coverage area of the second cell, and the terminal device may be located in an overlapping portion of the coverage areas of the first cell and the second cell. The first time delay value is a round-trip transmission time delay value from a satellite corresponding to the first cell to a reference point in a coverage area of a second cell, the second time delay value is not less than a public timing advance value broadcasted by the first cell, and the determined scheduling time delay value is a time delay value for uplink data transmission between the terminal equipment and the first network equipment. Or the second network device sends the first delay value to the terminal device, and the first delay value is used for determining the scheduling delay value. Or, the second network device sends location information of a coverage area of the second cell to the first network device, where the first network device is a network device corresponding to the first cell, such as a network device like a first cell base station, and the location information of the coverage area of the second cell is used to determine the first delay value. By the embodiment of the application, the scheduling delay value or the first delay value sent to the terminal equipment has higher precision, and the data transmission delay of the terminal equipment can be greatly reduced.

In a possible implementation manner, the determining a scheduling delay value according to the first delay value or according to the first delay value and the second delay value includes:

taking the first delay value as the scheduling delay value; the first time delay value is determined according to the position information of the coverage area of the second cell and the position information of the satellite corresponding to the first cell;

or, taking the sum of the first delay value and the second delay value as the scheduling delay value; and the first time delay value is determined according to the position information of the coverage area of the second cell and the position information of the satellite corresponding to the first cell, and the second time delay value is obtained through the broadcast message corresponding to the first cell.

In the embodiment of the present application, a possible specific implementation manner of determining a scheduling delay value is provided, and specifically, a first delay value is determined as the scheduling delay value, or a sum of the first delay value and a second delay value is determined as the scheduling delay value. The first time delay value is determined by the position information of the coverage area of the second cell and the position information of the satellite corresponding to the first cell, the first time delay value is the round-trip transmission time delay value from the satellite corresponding to the first cell to a reference point in the coverage area of the second cell, and the first time delay value is used for determining a scheduling time delay value; the second delay value is obtained by receiving a broadcast message corresponding to the first cell, where the second delay value is not less than the common timing advance value broadcasted by the first cell, and specifically, the second delay value may be the common timing advance value broadcasted by the first cell. According to the embodiment of the application, the determined scheduling delay value has higher precision based on the first delay value or based on the first delay value and the second delay value, and the time delay of the terminal equipment for data transmission can be greatly reduced.

sending a broadcast message or sending a radio resource control signaling to the terminal equipment or sending a media access layer control signaling to the terminal equipment; the broadcast message or the radio resource control signaling or the media access layer control signaling is used for indicating the scheduling delay value.

In the embodiment of the present application, a possible specific implementation manner for sending a scheduling delay value to a terminal device is provided, specifically, sending a broadcast message, or sending a radio resource control signaling, or sending a media access stratum control signaling, to the terminal device, is used to indicate the scheduling delay value determined by a second network device. By the embodiment of the application, the scheduling delay value sent to the terminal equipment has higher precision, and the time delay of the terminal equipment for data transmission can be greatly reduced.

In a fourth aspect, an embodiment of the present application provides a data transmission apparatus, where the apparatus includes:

the acquiring unit is used for acquiring a scheduling delay value; the scheduling delay value is determined according to the first delay value, or the scheduling delay value is determined according to the first delay value and the second delay value; the first time delay value is a round-trip transmission time delay value from a satellite corresponding to a first cell to a reference point in a coverage area of a second cell, the second time delay value is not less than a common timing advance value broadcasted by the first cell, and the coverage area of the second cell is overlapped with the coverage area of the first cell;

and the transmission unit is used for carrying out uplink data transmission with the first network equipment according to the first scheduling delay value.

In a possible implementation manner, the obtaining unit is specifically configured to receive the scheduling delay value from the first network device or a second network device, where the first network device is a network device corresponding to the first cell, and the second network device is a network device corresponding to the second cell.

In a possible implementation, the apparatus further comprises a determining unit:

the obtaining unit is specifically configured to receive the first delay value from the first network device or the second network device, where the first network device is a network device corresponding to the first cell, and the second network device is a network device corresponding to the second cell;

the determining unit is configured to determine the scheduling delay value according to the first delay value and the second delay value.

In a possible implementation manner, the obtaining unit is further configured to obtain the second delay value through a broadcast message corresponding to the first cell.

In a possible implementation manner, the first time delay value is determined according to the position information of the coverage area of the second cell and the position information of the satellite corresponding to the first cell.

In a possible implementation manner, the transmission unit is specifically configured to determine an uplink transmission resource time domain position according to the scheduling delay value, and send uplink data to the first network device at the uplink transmission resource time domain position.

With regard to the technical effects brought about by the fourth aspect or various possible embodiments, reference may be made to the introduction of the technical effects corresponding to the first aspect or the respective embodiments.

In a fifth aspect, an embodiment of the present application provides a data transmission apparatus, where the apparatus includes:

a determining unit, configured to determine a scheduling delay value according to a first delay value, or according to the first delay value and a second delay value, where the scheduling delay value is used for scheduling uplink data; the first network device is a network device corresponding to a first cell, the first delay value is a round-trip transmission delay value from a satellite corresponding to the first cell to a reference point in a coverage area of a second cell, the second delay value is not less than a common timing advance value broadcasted by the first cell, and the coverage area of the second cell is overlapped with the coverage area of the first cell; a sending unit, configured to send the scheduling delay value to a terminal device;

or,

a sending unit, configured to send a first delay value to a terminal device, where the first delay value is a round-trip transmission delay value from a satellite corresponding to a first cell to a reference point in a coverage area of a second cell, the first delay value is used to determine a scheduling delay value, the scheduling delay value is used to schedule uplink data, and a coverage area of the second cell overlaps with a coverage area of the first cell.

In a possible implementation, the apparatus further comprises a receiving unit:

the receiving unit is configured to receive location information of a coverage area of the second cell, which is sent by a second network device; the second network equipment is network equipment corresponding to the second cell;

the determining unit is configured to determine the first delay value according to the location information of the coverage area of the second cell and the location information of the satellite corresponding to the first cell.

In a possible implementation manner, the receiving unit is further configured to obtain the second delay value through a broadcast message corresponding to the first cell.

In a possible implementation manner, the determining unit is specifically configured to use the first delay value as the scheduling delay value;

or, the determining unit is specifically configured to use a sum of the first delay value and the second delay value as the scheduling delay value.

In a possible implementation manner, the sending unit is specifically configured to send a radio resource control signaling or a medium access layer control signaling to the terminal device, where the radio resource control signaling or the medium access layer control signaling is used to indicate the scheduling delay value to the terminal device.

With regard to the technical effect brought about by the fifth aspect or various possible embodiments, reference may be made to the introduction of the technical effect corresponding to the second aspect or the respective embodiment.

In a sixth aspect, an embodiment of the present application provides a data transmission apparatus, including:

a determining unit, configured to determine a scheduling delay value according to a first delay value, or according to the first delay value and a second delay value, where the first delay value is a round-trip transmission delay value from a satellite corresponding to a first cell to a reference point in a coverage area of a second cell, the second delay value is not less than a common timing advance value broadcasted by the first cell, and a coverage area of the second cell overlaps with a coverage area of the first cell; a sending unit, configured to send the scheduling delay value to a terminal device, where the scheduling delay value is used for scheduling uplink data;

or,

a sending unit, configured to send a first time delay value to a terminal device, where the first time delay value is a round-trip transmission time delay value from a satellite corresponding to a first cell to a reference point in a coverage area of a second cell, the first time delay value is used to determine a scheduling time delay value, the scheduling time delay value is used for scheduling uplink data, and a coverage area of the second cell overlaps with a coverage area of the first cell;

or,

a sending unit, configured to send location information of a coverage area of a second cell to a first network device; the first network device is a network device corresponding to a first cell, a coverage area of the second cell overlaps with a coverage area of the first cell, position information of the coverage area of the second cell is used for determining a first delay value, and the first delay value is a round-trip transmission delay value from a satellite corresponding to the first cell to a reference point in the coverage area of the second cell.

In a possible implementation manner, the determining unit is specifically configured to use the first delay value as the scheduling delay value; the first time delay value is determined according to the position information of the coverage area of the second cell and the position information of the satellite corresponding to the first cell; or,

the determining unit is specifically configured to use a sum of the first delay value and the second delay value as the scheduling delay value; and the first time delay value is determined according to the position information of the coverage area of the second cell and the position information of the satellite corresponding to the first cell, and the second time delay value is obtained through the broadcast message corresponding to the first cell.

In a possible implementation manner, the sending unit is specifically configured to send a broadcast message, or send a radio resource control signaling to the terminal device, or send a media access layer control signaling to the terminal device; the broadcast message or the radio resource control signaling or the media access layer control signaling is used for indicating the scheduling delay value.

With regard to the technical effects brought about by the sixth aspect or various possible embodiments, reference may be made to the introduction of the technical effects corresponding to the third aspect or the respective embodiments.

In a seventh aspect, an embodiment of the present application provides a communication apparatus, which includes a processor and a memory; the memory is used for storing computer execution instructions; the processor is configured to execute computer-executable instructions stored by the memory to cause the communication apparatus to perform the method according to the first aspect and any one of the possible embodiments, or to cause the communication apparatus to perform the method according to the second aspect and any one of the possible embodiments, or to cause the communication apparatus to perform the method according to the third aspect and any one of the possible embodiments. Optionally, the communication device further includes a transceiver, and the transceiver is configured to receive a signal or transmit a signal.

In an eighth aspect, an embodiment of the present application provides a communication apparatus, which includes a logic circuit and an interface; the logic circuit is coupled with the interface; the interface is configured to input and/or output code instructions, and the logic circuit is configured to execute the code instructions to cause the communication apparatus to perform the method according to the first aspect and any of the possible embodiments, or to cause the communication apparatus to perform the method according to the second aspect and any of the possible embodiments, or to cause the communication apparatus to perform the method according to the third aspect and any of the possible embodiments.

In a ninth aspect, embodiments of the present application provide a computer-readable storage medium for storing instructions or a computer program; the instructions or the computer program, when executed, cause the method of the first aspect and any one of the possible embodiments to be carried out, or cause the method of the second aspect and any one of the possible embodiments to be carried out, or cause the method of the third aspect and any one of the possible embodiments to be carried out.

In a tenth aspect, embodiments of the present application provide a computer program product comprising instructions or a computer program; the instructions or the computer program, when executed, cause the method of the first aspect and any one of the possible embodiments to be carried out, or cause the method of the second aspect and any one of the possible embodiments to be carried out, or cause the method of the third aspect and any one of the possible embodiments to be carried out.

In an eleventh aspect, embodiments of the present application provide a chip, which includes a processor, and the processor is configured to execute instructions, and when the processor executes the instructions, cause the chip to perform the method according to the first aspect and any possible implementation, or cause the chip to perform the method according to the second aspect and any possible implementation, or cause the chip to perform the method according to the third aspect and any possible implementation. Optionally, the chip further includes a communication interface, and the communication interface is used for receiving signals or sending signals.

In a twelfth aspect, an embodiment of the present application provides a system, including at least one of: the data transmission device of the fourth aspect, the data transmission device of the fifth aspect, the data transmission device of the sixth aspect, the communication device of the seventh aspect, the communication device of the eighth aspect, and the chip of the eleventh aspect.

In addition, in the process of executing the method according to the above aspects and any possible embodiment, the process of sending and/or receiving information and the like in the above method may be understood as a process of outputting information by a processor and/or a process of receiving input information by a processor. In outputting information, the processor may output the information to a transceiver (or a communication interface, or a sending module) for transmission by the transceiver. The information may also need to undergo additional processing after being output by the processor before reaching the transceiver. Similarly, when the processor receives input information, the transceiver (or the communication interface, or the transmission module) receives the information and inputs it to the processor. Further, after the transceiver receives the information, the information may need to be further processed before being input to the processor.

Based on the above principle, for example, the sending information mentioned in the foregoing method may be understood as processor output information. As another example, receiving information may be understood as information that the processor receives input.

Alternatively, the operations involving the processor, such as transmitting, sending, and receiving, may be more generally understood as operations involving the processor, such as outputs and receptions, inputs, and the like, if not specifically stated, or if not contradicted by their actual role or inherent logic in the associated description.

Optionally, in the process of executing the method according to the foregoing aspects and any possible implementation manner, the processor may be a processor dedicated to executing the method, or may be a processor, such as a general-purpose processor, that executes computer instructions in a memory to execute the method. The Memory may be a non-transitory (non-transitory) Memory, such as a Read Only Memory (ROM), which may be integrated on the same chip as the processor or may be separately disposed on different chips.

In a possible embodiment, the at least one memory is located outside the device.

In yet another possible embodiment, the at least one memory is located within the device.

In yet another possible implementation, a portion of the at least one memory is located within the apparatus, and another portion of the memory is located outside the apparatus.

In this application, the processor and the memory may also be integrated in one device, i.e. the processor and the memory may also be integrated together.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic view of a scenario of an NTN according to an embodiment of the present application;

fig. 2 is a schematic view of a scenario of scheduling a delay according to an embodiment of the present application;

fig. 3 is a schematic view of a scenario of dual connectivity according to an embodiment of the present application;

fig. 4 is an interaction diagram of a data transmission method according to an embodiment of the present application;

fig. 5 is an interaction diagram of another data transmission method according to an embodiment of the present application;

fig. 6 is an interaction diagram of another data transmission method provided in the embodiment of the present application;

fig. 7 is an interaction diagram of another data transmission method according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of a data transmission device according to an embodiment of the present application;

fig. 9 is a schematic structural diagram of another data transmission apparatus according to an embodiment of the present application;

fig. 10 is a schematic structural diagram of another data transmission apparatus according to an embodiment of the present application;

fig. 11 is a schematic structural diagram of a communication device according to an embodiment of the present application;

fig. 12 is a schematic structural diagram of another communication device according to an embodiment of the present application.

Detailed Description

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

The terms "first" and "second," and the like in the description, claims, and drawings of the present application are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions. Such as a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those skilled in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

It should be understood that, in the present application, "at least one" means one or more, "a plurality" means two or more, "at least two" means two or three and more, "and/or" for describing the association relationship of the associated objects, indicating that there may be three relationships, for example, "a and/or B" may indicate: only A, only B and both A and B are present, wherein A and B may be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of single item(s) or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", wherein a, b, c may be single or plural.

In order to describe the scheme of the present application more clearly, some knowledge related to NTN data transmission is introduced first below.

With the development of information technology, modern communication systems put forward more urgent requirements on high efficiency, maneuverability, diversity and the like of communication, and at present, satellites play an irreplaceable role in some important application scenes such as the fields of space communication, aviation communication, maritime communication, military communication and the like. The satellite communication has the characteristics of long communication distance, large coverage area, flexible networking and the like, and can provide communication service for fixed terminals and various mobile terminals. Since The conventional terrestrial network cannot provide seamless coverage for The terminal device, especially in The sea, desert, air, etc. where The base station cannot be deployed, the NTN is introduced into The fifth Generation (5G) mobile communication system, which provides seamless coverage for The terminal device by deploying The base station or a part of The base station functions on a high-altitude platform or a satellite. And the high-altitude platform or the satellite is less affected by natural disasters, so that the reliability of the 5G system can be improved. In the NTN based on satellite deployment, a satellite covers the ground through different beams to form a satellite cell, and a certain terminal device can be covered by a plurality of satellite cells at the same time.

The technical scheme provided by the embodiment of the application can be applied to various communication systems, such as a satellite communication system and a system for fusing satellite communication and a cellular network. The cellular network system may include, but is not limited to: a 5G System, a global System for Mobile communications (GSM) System, a Code Division Multiple Access (CDMA) System, a Wideband Code Division Multiple Access (WCDMA) System, a General Packet Radio Service (GPRS), a Long term evolution (Long term evolution, LTE) System, an LTE Frequency Division Duplex (FDD) System, an LTE Time Division Duplex (TDD Duplex) System, an Advanced Long term evolution (Advanced Long term evolution, LTE-a) System, a New air interface (New Radio, NR) System, an evolution System of the NR System, LTE (LTE-U) System on an unlicensed Frequency band, NR (NR-based to unlicensed spectrum) System on an unlicensed Frequency band, universal Mobile Telecommunications System (UMTS), worldwide Interoperability for Microwave Access (WiMAX) communication System, wireless Local Area Network (WLAN), wireless Fidelity (WiFi), a next-generation communication System, or other communication systems. Generally, a conventional communication system supports a limited number of connections and is easy to implement, however, with the development of communication technology, a mobile communication system will support not only conventional communication but also, for example: device-to-Device (D2D) Communication, machine-to-Machine (M2M) Communication, machine Type Communication (MTC), vehicle-to-Vehicle (V2V) Communication, and other Communication systems that evolve in the future, and the embodiments of the present application may also be applied to these Communication systems. The satellite communication system may include various non-terrestrial network systems, such as a network for wireless frequency transmission, e.g., a satellite or unmanned aerial vehicle (UAS) platform, and is not further described herein.

For example, an NTN system is taken as an example below to provide a specific application scenario of the present solution, where the NTN system may be a satellite communication system or other non-terrestrial network system, and the data transmission method in the present solution may be applied in the category of satellite communication.

Referring to fig. 1, taking a 5G communication system as an example, fig. 1 is a schematic view of an NTN scenario provided in an embodiment of the present application.

As shown in fig. 1, 104 represents the coverage area of one cell of satellite 101, in which one or more terminal devices 102 may be present. The coverage area 104 of the cell may be the area covered by one or more beams of a satellite or the same area as the cell level in an NR system. The ground terminal equipment 102 is accessed to the network through a 5G new air interface, and a 5G base station can be deployed on a satellite and is connected with a ground 5G core network through a wireless link and the ground station 103. Meanwhile, a wireless link exists between satellites, and signaling interaction and user data transmission between base stations are completed.

The various network elements and their interfaces in this scenario are illustrated as follows:

the terminal equipment: and mobile devices supporting a 5G new air interface, typically mobile devices such as user terminals and wearable devices. The satellite network can be accessed through the air interface and the services such as calling, surfing the internet and the like can be initiated.

5G base station: the method mainly provides wireless access service, schedules wireless resources to an access terminal, and provides reliable wireless transmission protocol and data encryption protocol.

5G core network: the method comprises services of user access control, mobility management, session management, user security authentication, charging and the like. It is composed of a plurality of functional units, and can be divided into control plane and data plane functional entities.

A ground station: and the system is responsible for forwarding signaling and service data between the satellite base station and the 5G core network.

5G New air interface: radio link between user equipment and base station

An Xn interface: the interface is an interface between a 5G base station and a base station and is mainly used for signaling interaction such as switching.

NG interface: the method is an interface between a 5G base station and a 5G core network, and mainly interacts signaling such as Non-Access Stratum (NAS) of the core network and service data of a user.

The technical scheme provided by the application mainly relates to two execution main bodies of network equipment and terminal equipment, can be applied to communication systems such as 5G and the like, and is particularly applied to the data transmission process of a non-ground network.

The terminal devices involved in the embodiments of the present application include, but are not limited to, connections via wire lines, such as Public Switched Telephone Networks (PSTN), digital Subscriber Lines (DSL), digital cables, and direct cable connections; and/or another data connection network; and/or via a wireless interface, such as: for cellular networks, wireless Local Area Networks (WLANs), digital television networks such as Digital Video Broadcast-Handheld (DVB-H) networks, satellite networks, AM-FM (Amplitude Modulation-Frequency Modulation) Broadcast transmitters; and/or means of another terminal device arranged to receive/transmit communication signals; and/or Internet of Things (IoT) devices. A terminal device arranged to communicate over a wireless interface may be referred to as a "wireless communication terminal", "wireless terminal", or "mobile terminal". Examples of such terminal devices include, but are not limited to, satellite phones or cellular phones; personal Communications Systems (PCS) terminals that may combine cellular radiotelephones with data processing, facsimile, and data Communications capabilities; personal Digital Assistants (PDAs) that may include radiotelephones, pagers, internet/intranet access, web browsers, notepads, calendars, and/or Global Positioning System (GPS) receivers; and conventional laptop and/or palmtop receivers or other electronic devices that include a radiotelephone transceiver. A terminal device may also be referred to as a User Equipment (UE), an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, a wireless communication device, a user agent, or a user equipment. The terminal device may also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a PDA, a handheld device with wireless communication capability, a computing device or other processing device connected to a wireless modem, a vehicle mounted device, a wearable device, a terminal device in a 5G network or a terminal device in a Public Land Mobile Network (PLMN) for future evolution, etc.

The network device involved in the embodiments of the present application may provide communication coverage in a specific geographic area, and may communicate with one or more terminal devices located in the coverage area, and may also be used to communicate with one or more base stations having partial terminal functions (e.g., communication between a macro base station and a micro base station, such as an access point). Alternatively, the network device may be a satellite, a Base Transceiver Station (BTS) in a GSM system or a CDMA system, an evolved Node B (eNB) in an LTE system, or a next generation Base Station (gNB) in a 5G system or an NR system, and other satellite Base stations and satellite relay nodes. In addition, the network device may also be an Access Point (AP), a transport point (TRP), a Central Unit (CU), or other network entities, and may include some or all of the above network entity functions.

It is to be understood that the device having the communication function in the network/system in the embodiment of the present application may be referred to as a communication device. Taking the communication system shown in fig. 1 as an example, the communication device may include a network device and a terminal device having a communication function, and the network device and the terminal device may be the above-mentioned specific devices, which are not described again here; the communication device may further include other devices in the communication system, such as other network entities like a network controller, a mobility management entity, and the like, which is not limited in this embodiment.

It should also be noted that, in the present application, the description of "satellite" and "satellite network device" are equivalent. That is, a satellite referred to in this application means a collection of satellites and other network devices associated with satellite communications.

It is understood that a cell in the NTN system may be a projection region of a beam of a satellite on the ground, a projection region of multiple beams of a satellite on the ground, or a partial region of a projection region of a beam or multiple beams on the ground.

In order to acquire uplink synchronization with the satellite, as shown in fig. 2, when the terminal device performs uplink transmission, it needs to transmit in advance for a period of time, which may be referred to as a TA value of the terminal device. In a general scenario, the TA value of the terminal device = RTT value between terminal device and satellite + common TA value broadcast by the first cell + TA value adjustment value indicated by the network. The RTT value between the terminal device and the satellite needs to be calculated according to ephemeris information and the position information of the terminal device obtained by using GNSS.

For this reason, it is necessary to enhance the uplink/downlink timing in the existing protocol by adding an extra time interval (K _ offset) to the existing protocol. For example, in a process of scheduling a Physical Uplink Shared Channel (PUSCH) by using an existing Physical Downlink Control Channel (PDCCH), downlink Control Information (DCI) in the PDCCH may instruct a terminal device to send a scheduling delay value (protocol is referred to as K2), and the terminal device transmits the PUSCH according to the instructed K2 value. However, there is a large propagation delay in NTN, and if the terminal device needs to perform advance transmission according to the TA value, this means that there must be a sufficiently large time interval between the PDCCH receiving time and the PUSCH transmitting time (at least, the time interval compensated by the terminal device cannot be smaller than the size of the TA value, and the size of the time interval compensated by the terminal device may be the round-trip propagation delay between the satellite and the terminal device). Therefore, in NTN, the scheduling delay value for PDCCH scheduling PUSCH should be: k2+ K _ offset, so that a sufficiently large time interval between the PDCCH receiving time and the PUSCH transmitting time can be ensured to enable the terminal device to perform early transmission.

In a general scenario, the terminal device reports its own location information or TA value to the network device, and the network device determines a scheduling delay value (the scheduling delay value is greater than or equal to the uplink TA value) according to the information reported by the terminal device, so as to complete the transmission of uplink data of the terminal device. In a Non-GNSS scenario (that is, the terminal device does not have GNSS capability and cannot acquire its own location information), the terminal device cannot calculate RTT between the terminal device and the serving satellite, and thus the terminal device cannot determine the current TA value when performing uplink transmission (for example, the terminal device sends the first message Msg 1). This may result in the network not being able to determine the scheduling delay value from the TA value or the location information of the terminal device. In this case, in order to meet the requirement of each terminal device, the network configures a larger K _ offset, which can be configured based on the largest RTT in the coverage area of the cell or the coverage area of the beam, which results in a larger transmission delay.

At present, a terminal device has a dual connection scenario in an NTN system, that is, the terminal device establishes a connection with 2 cells, and in the dual connection scenario, the problem of the transmission delay also exists, which is described in detail below. Referring to fig. 3, fig. 3 is a schematic view of a dual connection scenario provided in the embodiment of the present application.

As shown in fig. 3, C and D respectively represent a satellite corresponding to the first cell and a satellite corresponding to the second cell, the satellite C and the satellite D are in the same satellite orbit or in different satellite orbits, and fig. 3 is drawn by taking the satellite C and the satellite D in different satellite orbits as an example. A represents the point farthest from satellite C within the coverage area of the first cell; b represents a point within the second cell that may be the closest point within the coverage area of the second cell to the satellite C or any fixed point within the coverage area of the second cell relative to the satellite D (e.g., the closest point to the satellite D, which is plotted in fig. 3 for example).

It can be seen that, in this scenario, when satellite C determines the scheduling delay value by using RTT at point a, the determined scheduling delay value is too large, because the terminal device is not at the position of point a, but in the second cell. Therefore, the uplink transmission delay of the terminal device may be large.

In order to solve the above-mentioned problem that the uplink transmission delay of the terminal device is large, an embodiment of the present application provides a new data transmission method, where the data transmission method performs uplink data transmission with the first network device according to the obtained scheduling delay value, where the scheduling delay value determined according to the first delay value or according to the first delay value and the second delay value has high accuracy, and the uplink transmission delay of the terminal device can be greatly reduced.

Based on any of the above application scenarios, the NTN-based data transmission method provided in the present solution will be described in detail through a specific implementation.

Referring to fig. 4, fig. 4 is an interaction diagram of a data transmission method according to an embodiment of the present application, where the method includes, but is not limited to, the following steps:

step 401: the second network device determines a first delay value. The first time delay value is a round-trip transmission time delay value from a satellite corresponding to the first cell to a reference point in the coverage area of the second cell, and the coverage area of the first cell is overlapped with the coverage area of the second cell.

The second network device in this embodiment of the application is a network device corresponding to the second cell, such as a second cell base station and other network devices, and may specifically be different devices that carry a processor that can be used to execute a computer execution instruction, where the second network device may be a satellite, a base station or a gateway in a GSM system or a CDMA system, and may specifically be the base station in the satellite 101 in fig. 1, and is configured to determine the first delay value and send the first delay value to the terminal device.

In a possible implementation manner, the reference point may be a point within the coverage area of the second cell that is closest to the satellite corresponding to the first cell, or may be any fixed point within the coverage area of the second cell with respect to the position of the satellite corresponding to the second cell.

In one possible embodiment, the satellite corresponding to the first cell and the satellite corresponding to the second cell may be on the same satellite orbit or on different satellite orbits.

Specifically, the coverage area of the first cell and the coverage area of the second cell overlap, the coverage area of the first cell and the coverage area of the second cell partially overlap, or the coverage area of the first cell completely includes the coverage area of the second cell, and the terminal device may be located in the overlapping portion of the coverage areas of the first cell and the second cell.

Optionally, step 401 includes, in specific implementation: and the second network equipment determines a first time delay value according to the position information of the coverage area of the second cell and the position information of the satellite corresponding to the first cell.

Step 402: the second network device sends the first delay value to the terminal device. Correspondingly, the terminal device receives the first time delay value sent by the second network device.

In a possible implementation, the second network device sends a broadcast message or sends a radio resource control signaling or sends a media access layer control signaling to the terminal device, so as to indicate the first delay value determined by the second network device. According to the embodiment of the application, the first time delay value sent to the terminal equipment is high in precision, the scheduling time delay precision determined based on the first time delay value is also high, and the time delay of the terminal equipment for uplink transmission can be greatly reduced. The first time delay value is used for the terminal equipment to determine a scheduling time delay value, and the scheduling time delay value is used for the terminal equipment to schedule uplink data.

The terminal device in this embodiment of the present application is a device equipped with a processor capable of executing a computer execution instruction, and the terminal device may be a mobile phone, a computer, a vehicle, a wearable device, and the like, and specifically may be the terminal device 102 in fig. 1, and establishes a dual connection between a first cell and a second cell, and is configured to receive a first delay value sent by a second network device, and determine a scheduling delay value according to the first delay value.

Step 403: and the terminal equipment determines a scheduling delay value according to the first delay value and the second delay value.

For example, the terminal device may determine a sum of the first delay value and the second delay value as the scheduling delay value.

The second delay value is obtained by receiving a broadcast message corresponding to the first cell, where the second delay value is not less than the common timing advance value broadcast by the first cell, and specifically, the second delay value may be the common timing advance value broadcast by the first cell. The determined scheduling delay value is a delay value of uplink transmission between the terminal device and the first network device.

Optionally, the method provided in this embodiment further includes:

and the terminal equipment determines the time domain position of the uplink transmission resource according to the determined scheduling delay value, and transmits uplink data to the first network equipment at the time domain position of the uplink transmission resource, so that the time delay of the uplink transmission of the terminal equipment is greatly reduced. The uplink data includes uplink data scheduled by downlink control information, or uplink data scheduled by a random access response message, or a hybrid automatic repeat request acknowledgement message, or a sounding reference signal, etc.

Referring to fig. 5, fig. 5 is an interactive schematic diagram of another data transmission method according to an embodiment of the present application, where the method includes, but is not limited to, the following steps:

step 501: the second network device determines a scheduling delay value.

Optionally, the step 501 includes, in a specific implementation: and the second network equipment determines a first time delay value according to the position information of the coverage area of the second cell and the position information of the satellite corresponding to the first cell. And the second network equipment obtains a second time delay value by receiving the broadcast message corresponding to the first cell. Then, the second network device determines the sum of the obtained first delay value and the second delay value as a scheduling delay value. The first delay value is a round-trip transmission delay value from a satellite corresponding to the first cell to a reference point in a coverage area of a second cell, the second delay value is not less than a common timing advance value broadcasted by the first cell, specifically, the second delay value may be the common timing advance value broadcasted by the first cell, and the scheduling delay value is a delay value for uplink transmission between the terminal device and the first network device. The second network device is a network device corresponding to the second cell, such as a second cell base station and other network devices, a coverage area of the first cell overlaps with a coverage area of the second cell, specifically, the coverage area of the first cell partially overlaps with the coverage area of the second cell, or the coverage area of the first cell completely includes the coverage area of the second cell, and the terminal device may be located in the overlapping portion of the coverage areas of the first cell and the second cell.

The second network device in this embodiment of the present application is a different device that carries a processor capable of executing a computer execution instruction, and the second network device may be a satellite, a base station or a gateway in a GSM system or a CDMA system, and specifically may be the base station in the satellite 101 in fig. 1, and is configured to determine a scheduling delay value and send the scheduling delay value to a terminal device.

Step 502: and the second network equipment sends the scheduling delay value to the terminal equipment. Correspondingly, the terminal device receives the scheduling delay value sent by the second network device.

In a possible implementation, the second network device sends a broadcast message or sends a radio resource control signaling or sends a media access layer control signaling to the terminal device, so as to indicate the scheduling delay value determined by the second network device. According to the embodiment of the application, the scheduling delay value sent to the terminal equipment is high in precision, and the scheduling delay value is used for scheduling uplink data by the terminal equipment, so that the time delay of uplink transmission by the terminal equipment can be greatly reduced.

The terminal device in this embodiment of the present application is a device equipped with a processor capable of executing a computer execution instruction, and the terminal device may be a mobile phone, a computer, a vehicle, a wearable device, and the like, and specifically may be the terminal device 102 in fig. 1, and establishes dual connection between a first cell and a second cell, so as to receive a scheduling delay value sent by a second network device, and perform scheduling of uplink transmission according to the scheduling delay value.

Optionally, the method provided in this embodiment further includes:

and the terminal equipment determines the time domain position of the uplink transmission resource according to the determined scheduling delay value, and transmits uplink data to the first network equipment at the time domain position of the uplink transmission resource, so that the time delay of the uplink transmission of the terminal equipment is greatly reduced. The uplink data includes uplink data scheduled by downlink control information, or uplink data scheduled by a random access response message, or a hybrid automatic repeat request acknowledgement message, or a sounding reference signal.

Referring to fig. 6, fig. 6 is an interaction diagram of another data transmission method according to an embodiment of the present application, where the method includes, but is not limited to, the following steps:

step 601: the first network device determines a first delay value.

Optionally, the step 601 includes, in specific implementation: and the first network equipment determines a first time delay value according to the position information of the coverage area of the second cell and the position information of the satellite corresponding to the first cell. The first delay value is a round-trip transmission delay value from a satellite corresponding to the first cell to a reference point in a coverage area of the second cell, the first network device is a network device corresponding to the first cell, such as a first cell base station, and the like, a coverage area of the first cell overlaps a coverage area of the second cell, specifically, the coverage area of the first cell partially overlaps the coverage area of the second cell, or the coverage area of the first cell completely includes the coverage area of the second cell, and the terminal device may be located in an overlapping portion of the coverage areas of the first cell and the second cell.

The first network device in this embodiment is a different device carrying a processor capable of executing a computer-executable instruction, and the first network device may be a satellite, a base station or a gateway in a GSM system or a CDMA system, and may specifically be the base station in the satellite 101 in fig. 1, and is configured to determine a first delay value and send the first delay value to the terminal device.

Optionally, before step 601, the method provided in this embodiment further includes:

and the second network equipment sends the position information of the coverage area of the second cell to the first network equipment, wherein the position information of the coverage area of the second cell is used for determining the first time delay value. The second network device is a network device corresponding to the second cell, such as a second cell base station.

The second network device in this embodiment is a different device carrying a processor capable of executing a computer to execute instructions, and the second network device may be a satellite, a base station or a gateway in a GSM system or a CDMA system, and specifically may be the base station in the satellite 101 in fig. 1, and is configured to send the location information of the coverage area of the second cell to the first network device.

In a possible implementation manner, the reference point may be a point in the coverage area of the second cell that is closest to the satellite corresponding to the first cell, or may be any fixed point in the coverage area of the second cell relative to the position of the satellite corresponding to the second cell.

Step 602: the first network device sends the first delay value to the terminal device. Correspondingly, the terminal device receives the first time delay value sent by the first network device.

In a possible implementation, the first network device sends a broadcast message or sends a radio resource control signaling or sends a media access layer control signaling to the terminal device, so as to indicate the first delay value determined by the first network device. According to the embodiment of the application, the first time delay value sent to the terminal equipment is high in precision, the scheduling time delay precision determined based on the first time delay value is also high, and the time delay of the terminal equipment for uplink transmission can be greatly reduced. The first time delay value is used for the terminal equipment to determine a scheduling time delay value, and the scheduling time delay value is used for the terminal equipment to schedule uplink data.

The terminal device in this embodiment of the present application is a device equipped with a processor capable of executing a computer execution instruction, and the terminal device may be a mobile phone, a computer, a vehicle, a wearable device, and the like, and specifically may be the terminal device 102 in fig. 1, and establishes a dual connection between a first cell and a second cell, and is configured to receive a first delay value sent by a first network device, and determine a scheduling delay value according to the first delay value.

Step 603: and the terminal equipment determines a scheduling delay value according to the first delay value and the second delay value.

The method executed in this step is the same as step 403, and is not described herein again.

Step 604: and the terminal equipment performs uplink transmission with the first network equipment according to the scheduling delay value.

Specifically, the terminal device determines the time domain position of the uplink transmission resource according to the determined scheduling delay value, and sends uplink data to the first network device at the time domain position of the uplink transmission resource, thereby greatly reducing the delay of uplink transmission of the terminal device. The uplink data includes uplink data scheduled by downlink control information, or uplink data scheduled by a random access response message, or a hybrid automatic repeat request acknowledgement message, or a sounding reference signal, etc.

Fig. 7 is an interaction diagram of another data transmission method provided in an embodiment of the present application, where the method includes, but is not limited to, the following steps:

step 701: the first network device determines a scheduling delay value.

Optionally, step 701 includes, in specific implementation: and the first network equipment determines a first time delay value according to the position information of the coverage area of the second cell and the position information of the satellite corresponding to the first cell. And the first network equipment obtains a second time delay value by receiving the broadcast message corresponding to the first cell. Then, the first network device determines the sum of the obtained first delay value and the second delay value as a scheduling delay value. The first delay value is a round-trip transmission delay value from a satellite corresponding to the first cell to a reference point in a coverage area of a second cell, the second delay value is not less than a common timing advance value broadcasted by the first cell, specifically, the second delay value may be a common timing advance value broadcasted by the first cell, and the scheduling delay value is a delay value for uplink transmission between the terminal device and the first network device. The first network device is a network device corresponding to the first cell, such as a network device like a first cell base station, a coverage area of the first cell overlaps a coverage area of the second cell, specifically, the coverage area of the first cell partially overlaps the coverage area of the second cell, or the coverage area of the first cell completely includes the coverage area of the second cell, and the terminal device may be located in an overlapping portion of the coverage areas of the first cell and the second cell.

The first network device in this embodiment of the present application is a different device that is equipped with a processor capable of executing a computer execution instruction, and the first network device may be a satellite, a base station or a gateway in a GSM system or a CDMA system, and specifically may be the base station in the satellite 101 in fig. 1, and is configured to determine a scheduling delay value and send the scheduling delay value to a terminal device.

Optionally, before step 701, the method provided in this embodiment further includes:

and the second network equipment sends the position information of the coverage area of the second cell to the first network equipment, wherein the position information of the coverage area of the second cell is used for determining the first time delay value. The second network device is a network device corresponding to the second cell, such as a second cell base station and other network devices.

Step 702: and the first network equipment sends the scheduling delay value to the terminal equipment. Correspondingly, the terminal device receives the scheduling delay value sent by the first network device.

In a possible implementation, the first network device sends a broadcast message or sends a radio resource control signaling or sends a media access layer control signaling to the terminal device, so as to indicate the scheduling delay value determined by the first network device. According to the embodiment of the application, the scheduling delay value sent to the terminal equipment has high precision, and the scheduling delay value is used for scheduling uplink data of the terminal equipment, so that the time delay of uplink transmission of the terminal equipment can be greatly reduced.

The terminal device in this embodiment of the present application is a device equipped with a processor capable of executing a computer execution instruction, and the terminal device may be a mobile phone, a computer, a vehicle, a wearable device, and the like, and specifically may be the terminal device 102 in fig. 1, and establishes dual connection between a first cell and a second cell, so as to receive a scheduling delay value sent by a first network device, and schedule uplink transmission according to the scheduling delay value.

Step 703: and the terminal equipment performs uplink transmission with the first network equipment according to the scheduling delay value.

The method of the embodiments of the present application is explained in detail above, and the apparatus of the embodiments of the present application is provided below.

Referring to fig. 8, fig. 8 is a schematic structural diagram of a data transmission device according to an embodiment of the present application, where the data transmission device 80 may include an obtaining unit 801 and a transmission unit 802, where the units are described as follows:

an obtaining unit 801, configured to obtain a scheduling delay value; the scheduling delay value is determined according to the first delay value, or the scheduling delay value is determined according to the first delay value and the second delay value; the first time delay value is a round-trip transmission time delay value from a satellite corresponding to the first cell to a reference point in the coverage area of the second cell, the second time delay value is not less than the public timing advance value broadcasted by the first cell, and the coverage area of the second cell is overlapped with the coverage area of the first cell;

a transmitting unit 802, configured to perform uplink data transmission with the first network device according to the first scheduling delay value.

In a possible implementation, the apparatus further comprises a determining unit 803:

an obtaining unit 801, configured to receive a first delay value from a first network device or a second network device, where the first network device is a network device corresponding to a first cell, and the second network device is a network device corresponding to a second cell;

a determining unit 803, configured to determine a scheduling delay value according to the first delay value and the second delay value.

According to the embodiment of the present application, the units in the apparatus shown in fig. 8 may be respectively or entirely combined into one or several other units to form a structure, or some unit(s) therein may be further split into multiple functionally smaller units to form a structure, which may achieve the same operation without affecting the achievement of the technical effect of the embodiment of the present application. The units are divided based on logic functions, and in practical applications, the functions of one unit can also be implemented by a plurality of units, or the functions of a plurality of units can also be implemented by one unit. In other embodiments of the present application, the network-based device may also include other units, and in practical applications, these functions may also be implemented with the assistance of other units, and may be implemented by cooperation of multiple units.

It should be noted that the implementation of each unit may also correspond to the corresponding description with reference to the method embodiments shown in fig. 4 to fig. 7.

In the embodiment of the present application, the data transmission device may be the terminal device shown above or a chip in the terminal device, etc. I.e. the data transmission means may be adapted to perform the steps or functions etc. performed by the terminal device in the above method embodiments.

In the data transmission apparatus 80 depicted in fig. 8, uplink data transmission is performed with the first network device according to the obtained scheduling delay value, where the scheduling delay value determined according to the first delay value or according to the first delay value and the second delay value has higher precision, so that the delay of data transmission of the terminal device can be greatly reduced.

The data transmission device according to the embodiment of the present application is described above, and possible product forms of the data transmission device are described below. It should be understood that any product having any shape and function of the data transmission device of fig. 8 described above falls within the scope of the embodiments of the present application. It should also be understood that the following description is only exemplary and does not limit the product form of the data transmission device according to the embodiments of the present application.

In a possible implementation, in the data transmission apparatus shown in fig. 8, each processing unit may correspond to one or more processors, wherein the obtaining unit 801 may correspond to a receiver, the transmitting unit 802 may correspond to a transmitter, and the obtaining unit 801 and the transmitting unit 802 may also be integrated into one device, such as a transceiver. In this embodiment, the processor and the transceiver may be coupled, and the like, and the coupling in this embodiment is an indirect coupling or a communication connection between the devices, units, or modules, and may be in an electrical, mechanical, or other form, which is used for information interaction between the devices, units, or modules. The embodiment of the present application is not limited to the connection mode between the processor and the transceiver.

Referring to fig. 9, fig. 9 is a schematic structural diagram of a data transmission apparatus according to an embodiment of the present application, where the data transmission apparatus 90 may include a determining unit 901 and a sending unit 902, where the units are described as follows:

a determining unit 901, configured to determine a scheduling delay value according to the first delay value, or according to the first delay value and the second delay value, where the scheduling delay value is used for scheduling uplink data; the first network equipment is the network equipment corresponding to the first cell, the first time delay value is the round-trip transmission time delay value from the satellite corresponding to the first cell to the reference point in the coverage area of the second cell, the second time delay value is not less than the public timing advance value broadcasted by the first cell, and the coverage area of the second cell is overlapped with the coverage area of the first cell; a sending unit 902, configured to send a scheduling delay value to a terminal device;

or,

a sending unit 902, configured to send a first delay value to a terminal device, where the first delay value is a round-trip transmission delay value from a satellite corresponding to a first cell to a reference point in a coverage area of a second cell, the first delay value is used to determine a scheduling delay value, the scheduling delay value is used to schedule uplink data, and the coverage area of the second cell overlaps with the coverage area of the first cell.

In a possible implementation, the apparatus further comprises a receiving unit 903:

a receiving unit 903, configured to receive location information of a coverage area of a second cell sent by a second network device; the second network equipment is corresponding to the second cell;

a determining unit 901, configured to determine a first time delay value according to the location information of the coverage area of the second cell and the location information of the satellite corresponding to the first cell.

According to the embodiment of the present application, the units in the apparatus shown in fig. 9 may be respectively or entirely combined into one or several other units to form a structure, or some unit(s) therein may be further split into multiple functionally smaller units to form a structure, which may achieve the same operation without affecting the achievement of the technical effect of the embodiment of the present application. The units are divided based on logic functions, and in practical application, the functions of one unit can be realized by a plurality of units, or the functions of a plurality of units can be realized by one unit. In other embodiments of the present application, the network-based device may also include other units, and in practical applications, these functions may also be implemented by being assisted by other units, and may be implemented by cooperation of multiple units.

It should be noted that the implementation of each unit may also correspond to the corresponding description of the method embodiments described above with reference to fig. 4 to 7.

In the embodiment of the present application, the data transmission apparatus may be the first network device shown above or a chip in the first network device, and the like. I.e. the data transmission means may be adapted to perform the steps or functions etc. performed by the first network device in the above method embodiments.

In the data transmission apparatus 90 depicted in fig. 9, uplink data transmission is performed with the first network device according to the obtained scheduling delay value, where the scheduling delay value determined according to the first delay value or according to the first delay value and the second delay value has higher precision, so that the delay of data transmission of the terminal device can be greatly reduced.

The data transmission device according to the embodiment of the present application is described above, and possible product forms of the data transmission device are described below. It should be understood that any product having any shape and function of the data transmission device of fig. 9 described above falls within the scope of the embodiments of the present application. It should be further understood that the following description is only by way of example, and the product form of the data transmission device according to the embodiments of the present application is not limited thereto.

In a possible implementation, in the data transmission apparatus shown in fig. 9, each processing unit may correspond to one or more processors, wherein the receiving unit 903 may correspond to a receiver, the sending unit 902 may correspond to a transmitter, and the receiving unit 903 and the sending unit 902 may also be integrated into one device, such as a transceiver. In this embodiment, the processor and the transceiver may be coupled, and the like, and the coupling in this embodiment is an indirect coupling or a communication connection between the devices, units, or modules, and may be in an electrical, mechanical, or other form, which is used for information interaction between the devices, units, or modules. The embodiment of the present application is not limited to the connection mode between the processor and the transceiver.

Referring to fig. 10, fig. 10 is a schematic structural diagram of a data transmission device according to an embodiment of the present application, where the data transmission device 100 may include a determining unit 1001 and a sending unit 1002, where the units are described as follows:

a determining unit 1001, configured to determine a scheduling delay value according to a first delay value, or according to the first delay value and a second delay value, where the first delay value is a round-trip transmission delay value from a satellite corresponding to a first cell to a reference point in a coverage area of a second cell, the second delay value is not less than a common timing advance value broadcasted by the first cell, and the coverage area of the second cell overlaps with the coverage area of the first cell; a sending unit 1002, configured to send a scheduling delay value to a terminal device, where the scheduling delay value is used for scheduling uplink data;

or,

a sending unit 1002, configured to send a first time delay value to a terminal device, where the first time delay value is a round-trip transmission time delay value from a satellite corresponding to a first cell to a reference point in a coverage area of a second cell, the first time delay value is used to determine a scheduling time delay value, the scheduling time delay value is used for scheduling uplink data, and the coverage area of the second cell overlaps with the coverage area of the first cell;

or,

a sending unit 1002, configured to send location information of a coverage area of a second cell to a first network device; the first network device is a network device corresponding to a first cell, a coverage area of a second cell is overlapped with a coverage area of the first cell, position information of the coverage area of the second cell is used for determining a first time delay value, and the first time delay value is a round-trip transmission time delay value from a satellite corresponding to the first cell to a reference point in the coverage area of the second cell.

According to the embodiment of the present application, the units in the apparatus shown in fig. 10 may be respectively or entirely combined into one or several other units to form a structure, or some unit(s) therein may be further split into multiple functionally smaller units to form a structure, which may achieve the same operation without affecting the achievement of the technical effect of the embodiment of the present application. The units are divided based on logic functions, and in practical application, the functions of one unit can be realized by a plurality of units, or the functions of a plurality of units can be realized by one unit. In other embodiments of the present application, the network-based device may also include other units, and in practical applications, these functions may also be implemented by being assisted by other units, and may be implemented by cooperation of multiple units.

In the embodiment of the present application, the data transmission apparatus may be the second network device shown above or a chip in the second network device, or the like. I.e. the data transmission means may be adapted to perform the steps or functions etc. performed by the second network device in the above method embodiments.

In the data transmission apparatus 100 depicted in fig. 10, uplink data transmission is performed with the first network device according to the obtained scheduling delay value, where the scheduling delay value determined according to the first delay value or according to the first delay value and the second delay value has higher accuracy, so that the delay of data transmission of the terminal device can be greatly reduced.

The data transmission device according to the embodiment of the present application is described above, and possible product forms of the data transmission device are described below. It should be understood that any product with any shape that has the functions of the data transmission device shown in fig. 10 described above falls within the scope of the embodiments of the present application. It should also be understood that the following description is only exemplary and does not limit the product form of the data transmission device according to the embodiments of the present application.

In a possible implementation manner, in the data transmission device shown in fig. 10, each processing unit may correspond to one or more processors, wherein the sending unit 1002 may correspond to a transmitter, and may also be integrated into one transceiver. In this embodiment, the processor and the transceiver may be coupled, and the like, and the coupling in this embodiment is an indirect coupling or a communication connection between the devices, units, or modules, and may be in an electrical, mechanical, or other form, which is used for information interaction between the devices, units, or modules. The embodiment of the present application is not limited to the connection mode between the processor and the transceiver.

Referring to fig. 11, fig. 11 is a schematic structural diagram of a communication device 110 according to an embodiment of the present disclosure. The communication device 110 may include a memory 1101, a processor 1102. Further optionally, a communication interface 1103 and a bus 1104 may be included, wherein the memory 1101, the processor 1102 and the communication interface 1103 are communicatively connected to each other via the bus 1104. The communication interface 1103 is used for data interaction with other devices.

In the embodiment of the present application, a specific connection medium among the communication interface 1103, the processor 1102, and the memory 1101 is not limited. In the embodiment of the present application, the memory 1101, the processor 1102 and the communication interface 1103 are connected by a bus 1104 in fig. 11, the bus is denoted by a reference numeral in fig. 11, and the connection manner between other components is only schematically illustrated and is not limited. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one line is shown in FIG. 11, but this does not represent only one bus or one type of bus.

The memory 1101 is used to provide a storage space, and data such as an operating system and a computer program may be stored in the storage space. The memory 1101 includes, but is not limited to, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM), or a portable read-only memory (CD-ROM). The memory in the embodiments of the present application may also be circuitry or any other device capable of performing a storage function for storing program instructions and/or data.

The processor 1102 is a module for performing arithmetic operations and logical operations, and may be one or a combination of plural kinds of processing modules such as a Central Processing Unit (CPU), a Graphics Processing Unit (GPU), a microprocessor unit (MPU), or the like. The processor may implement or execute each method, step, and logic block disclosed in the embodiments of the present application, and the steps of the method disclosed in the embodiments of the present application may be directly implemented as a hardware processor, or implemented by a combination of hardware and software modules in the processor.

The memory 1101 stores a computer program, and the processor 1102 calls the computer program stored in the memory 1101 to execute the data transmission method shown in fig. 4 to 7:

acquiring a scheduling delay value; the scheduling delay value is determined according to the first delay value, or the scheduling delay value is determined according to the first delay value and the second delay value; the first time delay value is a round-trip transmission time delay value from a satellite corresponding to the first cell to a reference point in the coverage area of the second cell, the second time delay value is not less than the public timing advance value broadcasted by the first cell, and the coverage area of the second cell is overlapped with the coverage area of the first cell;

and performing uplink data transmission with the first network equipment according to the scheduling delay value.

For details of the method executed by the processor 1102, reference may be made to fig. 4 to fig. 7, which are not described herein again.

Accordingly, the processor 1102 calls the computer program stored in the memory 1101, and may also be configured to execute the method steps executed by each unit in the data transmission device 80 shown in fig. 8, and specific contents thereof may refer to fig. 8, which is not described herein again.

On the other hand, the memory 1101 stores a computer program, and the processor 1102 calls the computer program stored in the memory 1101 to execute the data transmission method shown in fig. 4 to 7:

determining a scheduling delay value according to the first delay value or the first delay value and the second delay value, wherein the scheduling delay value is used for scheduling uplink data; the first network equipment is the network equipment corresponding to the first cell, the first time delay value is the round-trip transmission time delay value from the satellite corresponding to the first cell to the reference point in the coverage area of the second cell, the second time delay value is not less than the public timing advance value broadcasted by the first cell, and the coverage area of the second cell is overlapped with the coverage area of the first cell; sending a scheduling delay value to the terminal equipment;

or,

and sending a first time delay value to the terminal equipment, wherein the first time delay value is a round-trip transmission time delay value from a satellite corresponding to the first cell to a reference point in a coverage area of a second cell, the first time delay value is used for determining a scheduling time delay value, the scheduling time delay value is used for scheduling uplink data, and the coverage area of the second cell is overlapped with the coverage area of the first cell.

Accordingly, the processor 1102 calls the computer program stored in the memory 1101, and may also be configured to execute the method steps executed by each unit in the data transmission apparatus 90 shown in fig. 9, and specific content thereof may refer to fig. 9, which is not described herein again.

In another aspect, a computer program is stored in the memory 1101, and the processor 1102 calls the computer program stored in the memory 1101 to execute the data transmission method shown in fig. 4 to 7:

determining a scheduling delay value according to a first delay value or a first delay value and a second delay value, wherein the first delay value is a round-trip transmission delay value from a satellite corresponding to a first cell to a reference point in a coverage area of a second cell, the second delay value is not less than a public timing advance value broadcasted by the first cell, and the coverage area of the second cell is overlapped with the coverage area of the first cell; sending a scheduling delay value to the terminal equipment, wherein the scheduling delay value is used for scheduling uplink data;

or,

sending the position information of the coverage area of the second cell to the first network equipment; the first network device is a network device corresponding to a first cell, a coverage area of a second cell is overlapped with a coverage area of the first cell, position information of the coverage area of the second cell is used for determining a first time delay value, and the first time delay value is a round-trip transmission time delay value from a satellite corresponding to the first cell to a reference point in the coverage area of the second cell.

Accordingly, the processor 1102 calls the computer program stored in the memory 1101, and may also be configured to execute the method steps executed by each unit in the data transmission apparatus 100 shown in fig. 10, and specific content thereof may refer to fig. 10, which is not described herein again.

In the communication apparatus 110 described in fig. 11, uplink data transmission is performed with the first network device according to the obtained scheduling delay value, where the scheduling delay value determined according to the first delay value or according to the first delay value and the second delay value has higher accuracy, so that the delay of data transmission of the terminal device can be greatly reduced.

It is understood that the communication device shown in the embodiment of the present application may also have more components than those shown in fig. 11, and the embodiment of the present application does not limit this. The method performed by the processor shown above is only an example, and reference may be made to the method described above for the steps specifically performed by the processor.

Referring to fig. 12, fig. 12 is a schematic structural diagram of a communication device according to an embodiment of the present disclosure.

The communication device includes a logic circuit 1201 and an interface 1202. The logic circuit 1201 may be a chip, a processing circuit, an integrated circuit or a system on chip (SoC) chip, and the interface 1202 may be a communication interface, an input/output interface, a pin, and the like. Exemplarily, fig. 12 illustrates the communication device as a chip, and the chip includes a logic circuit 1201 and an interface 1202.

In the embodiments of the present application, the logic circuit and the interface may also be coupled to each other. The embodiments of the present application are not limited to the specific connection manner of the logic circuit and the interface.

It is understood that reference may be made to the apparatus shown in fig. 11 for a detailed description of the logic circuits and interfaces.

It is understood that the communication device shown in the embodiment of the present application may implement the method provided in the embodiment of the present application in the form of hardware, or may implement the method provided in the embodiment of the present application in the form of software, and the embodiment of the present application is not limited thereto.

For specific implementation of the various embodiments shown in fig. 12, reference may also be made to the above various embodiments, which are not described in detail here.

Embodiments of the present application further provide a computer-readable storage medium, where a computer program is stored in the computer-readable storage medium, and when the computer program runs on one or more processors, the method shown in fig. 4, 5, 6, and 7 may be implemented.

Embodiments of the present application further provide a computer program product, where the computer program product includes a computer program, and when the computer program product runs on a processor, the method shown in fig. 4, 5, 6, and 7 may be implemented.

The embodiment of the present application further provides a chip, where the chip includes a processor, and the processor is configured to execute instructions, and when the processor executes the instructions, the method shown in fig. 4, fig. 5, fig. 6, and fig. 7 may be implemented. Optionally, the chip further comprises a communication interface for inputting signals or outputting signals.

The embodiment of the present application further provides a system, which includes at least one of the above-mentioned data transmission device 80, data transmission device 90, data transmission device 100, communication device 110, or communication device or chip in fig. 12.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions when actually implementing, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not implemented. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may also be an electric, mechanical or other form of connection.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the technical effects of the solutions provided by the embodiments of the present application.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed to by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a readable storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned readable storage medium comprises: various media capable of storing program codes, such as a usb disk, a removable hard disk, a read-only memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A data transmission method is applied to terminal equipment and is characterized by comprising the following steps:

2. The method of claim 1, wherein obtaining the scheduling delay value comprises:

and receiving the scheduling delay value from the first network device or a second network device, where the first network device is a network device corresponding to the first cell, and the second network device is a network device corresponding to the second cell.

3. The method of claim 1, further comprising:

the obtaining of the scheduling delay value includes:

4. The method of claim 3, wherein the scheduling delay value is a sum of the first delay value and the second delay value.

5. The method according to claim 3 or 4, characterized in that the method further comprises:

6. The method of any of claims 1 to 5, wherein the first delay value is determined according to location information of a coverage area of the second cell and location information of a satellite corresponding to the first cell.

7. The method according to any one of claims 1 to 6, wherein said performing uplink data transmission with a first network device according to the scheduling delay value comprises:

8. The method of any of claims 1-7, wherein the reference point is a farthest point from a satellite corresponding to the first cell to a coverage area of the second cell.

9. The method of any one of claims 1 to 8, wherein the satellite corresponding to the first cell is in the same satellite orbit as the satellite corresponding to the second cell, or in a different satellite orbit.

10. A data transmission method is applied to a first network device, and is characterized by comprising the following steps:

or,

11. The method of claim 10, further comprising:

12. The method according to claim 10 or 11, characterized in that the method further comprises:

13. The method of any one of claims 10 to 12, wherein determining the scheduling delay value according to the first delay value or according to the first delay value and the second delay value comprises:

taking the first delay value as the scheduling delay value;

14. The method according to any of claims 10 to 13, wherein the sending the scheduling delay value to a terminal device comprises:

15. The method of any of claims 10 to 14, wherein the reference point is a point farthest from a satellite corresponding to the first cell to a coverage area of the second cell.

16. The method of any of claims 10 to 15, wherein the satellite corresponding to the first cell is in the same satellite orbit or in a different satellite orbit than the satellite corresponding to the second cell.

17. A data transmission method is applied to a second network device, and is characterized by comprising the following steps:

or,

18. The method of claim 17, wherein determining the scheduling delay value according to the first delay value or according to the first delay value and the second delay value comprises:

19. The method according to claim 17 or 18, wherein said transmitting the scheduling delay value to the terminal device comprises:

sending a broadcast message or sending a radio resource control signaling to the terminal equipment or sending a media access layer control signaling to the terminal equipment; the broadcast message or the radio resource control signaling or the media access layer control signaling is used to indicate the scheduling delay value.

20. The method of any of claims 17 to 19, wherein the reference point is a point farthest from a satellite corresponding to the first cell to a coverage area of the second cell.

21. The method of any of claims 17 to 20, wherein the satellite corresponding to the first cell is in the same satellite orbit or in a different satellite orbit than the satellite corresponding to the second cell.

22. A data transmission apparatus, comprising:

23. A data transmission apparatus, comprising:

a determining unit, configured to determine a scheduling delay value according to a first delay value, or according to the first delay value and a second delay value, where the scheduling delay value is used for scheduling uplink data; the first network device is a network device corresponding to a first cell, the first time delay value is a round-trip transmission time delay value from a satellite corresponding to the first cell to a reference point in a coverage area of a second cell, the second time delay value is not less than a common timing advance value broadcasted by the first cell, and the coverage area of the second cell is overlapped with the coverage area of the first cell; a sending unit, configured to send the scheduling delay value to a terminal device;

or,

a sending unit, configured to send a first delay value to a terminal device, where the first delay value is a round-trip transmission delay value from a satellite corresponding to the first cell to a reference point in a coverage area of the second cell, the first delay value is used to determine a scheduling delay value, the scheduling delay value is used to schedule uplink data, and a coverage area of the second cell overlaps with a coverage area of the first cell.

24. A data transmission apparatus, comprising:

or,

a sending unit, configured to send a first delay value to a terminal device, where the first delay value is a round-trip transmission delay value from a satellite corresponding to a first cell to a reference point in a coverage area of a second cell, the first delay value is used to determine a scheduling delay value, the scheduling delay value is used to schedule uplink data, and a coverage area of the second cell overlaps with a coverage area of the first cell;

or,

25. A communications apparatus, comprising: a processor and a memory;

the memory is used for storing computer execution instructions;

the processor is configured to execute computer-executable instructions stored by the memory to cause the communication device to perform the method of any one of claims 1 to 9, or to cause the communication device to perform the method of any one of claims 10 to 16, or to cause the communication device to perform the method of any one of claims 17 to 21.

26. A communications apparatus, comprising: logic circuits and interfaces; the logic circuit is coupled with the interface;

the interface is for inputting and/or outputting code instructions, and the logic circuit is for executing the code instructions to cause the method of any one of claims 1 to 9 to be performed, or to cause the method of any one of claims 10 to 16 to be performed, or to cause the method of any one of claims 17 to 21 to be performed.

27. A computer-readable storage medium, comprising:

the computer readable storage medium is used for storing instructions or a computer program; the instructions or the computer program, when executed, cause the method of any one of claims 1 to 9 to be implemented, or cause the method of any one of claims 10 to 16 to be implemented, or cause the method of any one of claims 17 to 21 to be implemented.

28. A computer program product, comprising: instructions or computer programs;

the instructions or the computer program, when executed, cause the method of any one of claims 1 to 9 to be implemented, or cause the method of any one of claims 10 to 16 to be implemented, or cause the method of any one of claims 17 to 21 to be implemented.