CN115707129A

CN115707129A - Data transmission method and related device

Info

Publication number: CN115707129A
Application number: CN202110883676.XA
Authority: CN
Inventors: 雷珍珠; 周化雨
Original assignee: Spreadtrum Semiconductor Nanjing Co Ltd
Current assignee: Spreadtrum Semiconductor Nanjing Co Ltd
Priority date: 2021-08-03
Filing date: 2021-08-03
Publication date: 2023-02-17
Also published as: WO2023011522A1

Abstract

The embodiment of the application provides a data transmission method and a related device, which relate to the technical field of communication, and the data transmission method comprises the following steps: the network equipment sends first configuration information used for indicating the offset to the terminal equipment, and the terminal equipment determines that downlink data sent by the network equipment is not received between the first time domain position and the second time domain position according to the first configuration information. The first time domain position is earlier than the second time domain position, the first time domain position is determined according to the offset, and the second time domain position is determined according to the starting time domain position of the first uplink transmission resource, so that collision between uplink data sent by the terminal equipment and downlink data sent by the network equipment in time is avoided, and reliability of data transmission is improved.

Description

Data transmission method and related device

Technical Field

The embodiment of the application relates to the technical field of communication, in particular to a data transmission method and a related device.

Background

In a non-terrestrial network (NTN), when a terminal device transmits data to a network device using an uplink transmission resource, the data is transmitted in advance according to a Timing Advance (TA) value.

Because the propagation delay between the terminal device and the network device in the NTN network is large, and the TA value is calculated by the terminal device according to the position information of the terminal device, the network device cannot determine the specific time domain position of the terminal device that actually sends the uplink data.

Since the half-duplex terminal device cannot receive and transmit data at the same time, uplink data transmitted by the terminal device may collide with downlink data transmitted by the network device in time, thereby reducing reliability of data transmission.

Disclosure of Invention

The embodiment of the application provides a data transmission method, a time interval is determined through a starting time domain position and an offset of an uplink transmission resource, in the interval, terminal equipment does not receive downlink data sent by network equipment, and meanwhile, the network equipment does not send the downlink data to the terminal equipment, so that collision between the uplink data sent by the terminal equipment and the downlink data sent by the network equipment in time is avoided, and the reliability of data transmission is further improved.

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

the terminal equipment receives first configuration information sent by the network equipment, wherein the first configuration information is used for indicating an offset; the terminal equipment determines that downlink data sent by the network equipment is not received between the first time domain position and the second time domain position; the first time domain position is earlier than the second time domain position, the first time domain position is determined according to the offset, the second time domain position is determined according to a starting time domain position of a first uplink transmission resource, and the first uplink transmission resource is a resource used by the terminal device for sending uplink data.

In the embodiment of the present application, the offset may be understood as K _ offset. It is to be understood that K _ offset is determined by the network device, and in particular, the network device may determine K _ offset by:

(1) If the terminal device feeds back the TA value determined by itself to the network device, then the network device may determine the K _ offset value corresponding to the terminal device according to the TA value fed back by the terminal device. Illustratively, the network device may set K _ offset to a value no less than TA fed back by the terminal device.

(2) If the terminal device does not feed back the TA value determined by itself to the network device, the network device may determine the TA value according to a Round Trip Time (RTT) value between a reference point in a service area of the network device and the network device. Illustratively, the network device may determine K _ offset from the RTT value between the point farthest from the satellite in its service area and the satellite and the common TA value. Illustratively, the K _ offset determined by the network device is equal to the common TA plus the RTT value between the network device and the location within its service area that is farthest from the network device.

Thus, in general, the K _ offset determined by the network device will be greater than or equal to the TA value determined by the terminal device.

Optionally, after the terminal device accesses the network device and acquires downlink synchronization, the terminal device receives first configuration information sent by the network device. The first configuration information may be understood as system information (system information), and specifically, the terminal device may acquire the system information by listening to a Broadcast Control Channel (BCCH), so as to acquire K _ offset.

It can be understood that, since the first time domain position is determined according to K _ offset, the second time domain position is determined according to the starting time domain position of the first uplink transmission resource, and K _ offset is greater than or equal to the TA value of the terminal device, the actual position of the terminal device for sending uplink data may fall within the interval formed by the first time domain position to the second time domain position.

Therefore, in the interval formed by the first time domain position and the second time domain position, the terminal device does not receive the downlink data sent by the network device; accordingly, in the interval formed by the first time domain position and the second time domain position, the network device does not send the downlink data aiming at the terminal device, so that the uplink data sent by the terminal device and the downlink data sent by the network device can be prevented from colliding in time, and the reliability of data transmission is further improved.

In one possible implementation, the time interval between the first time domain position and the second time domain position is the offset; the second time domain position is a starting time domain position of the first uplink transmission resource.

In a possible implementation manner, the first configuration information is further used to indicate a first time length value, where the first time length value is not less than twice of a maximum differential delay corresponding to a serving cell or a serving beam coverage area where the terminal device is located;

the first time domain position and the second time domain position are earlier than the starting time domain position of the first uplink transmission resource;

a time interval between the first time domain position and the starting time domain position of the first uplink transmission resource is equal to the offset; the time interval between the second time domain position and the starting time domain position of the first uplink transmission resource is equal to the difference between the offset and the first time length value.

In a possible implementation manner, the downlink data sent by the network device includes data sent by the network device through a physical downlink control channel PDCCH and/or data sent by the network device through a downlink semi-persistent scheduling manner.

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

the terminal equipment receives first configuration information sent by the network equipment, wherein the first configuration information is used for indicating an offset;

the terminal equipment receives downlink control information DCI, wherein the DCI is used for scheduling a first uplink transmission resource, and the first uplink transmission resource is a resource used for sending uplink data by the terminal equipment;

the terminal equipment does not receive data sent by the network equipment in a downlink semi-persistent scheduling mode between the first time domain position and the second time domain position; wherein the first time domain position is earlier than the second time domain position, and the first time domain position is determined according to a subframe or a time slot where an end position of the transmission resource of the DCI is located; the second time domain position is determined from the offset.

It can be understood that, when the network device configures the uplink transmission resource for the terminal device in a dynamic scheduling manner, the terminal device needs to monitor the PDCCH to receive the DCI, and determine the starting time domain position of the uplink transmission resource through the DCI.

For both the terminal device and the network device, the subframe or slot pair occupied by the PDCCH is known, the subframe or slot in which the end position of the transmission resource for the network device to send the DCI to the terminal device is located is used to determine the first time domain position, K _ offset is used to determine the second time domain position, and K _ offset is greater than or equal to the TA value of the terminal device, so the actual position of the terminal device to send uplink data may fall within an interval formed by the first time domain position to the second time domain position.

In the embodiment of the application, in an interval formed from the first time domain position to the second time domain position, the terminal device does not receive downlink data sent by the network device; correspondingly, in the interval formed by the first time domain position and the second time domain position, the network device does not send the downlink data aiming at the terminal device, so that the uplink data sent by the terminal device and the downlink data sent by the network device can be prevented from colliding in time, and the reliability of data transmission is further improved.

In one possible implementation, the DCI is configured to indicate a scheduling delay value, and the scheduling delay value and the offset are used to determine a starting time domain position of the first uplink transmission resource.

In a possible implementation manner, the first time domain position is a subframe or a time slot where an end position of the transmission resource of the DCI is located; the time interval between the second time domain position and the first time domain position is the sum of the time of the scheduling delay value and the offset.

In one possible implementation, the ending position of the DCI transmission resource is located in a subframe or a time slot earlier than the first time domain position; the time interval between the first time domain position and the subframe or time slot where the end position of the transmission resource of the DCI is located is the scheduling delay value; the time interval between the second time domain position and the first time domain position is the offset.

In one possible implementation manner, the downlink data sent by the network device includes data sent by the network device in a downlink semi-persistent scheduling manner.

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

the terminal equipment receives second configuration information sent by the network equipment, wherein the second configuration information is used for indicating a first time length value, and the first time length value is not less than twice of the maximum differential time delay corresponding to a service cell or a service beam coverage area where the terminal equipment is located;

the terminal equipment receives downlink control information DCI, wherein the DCI is used for scheduling first uplink transmission resources, and the first uplink transmission resources are resources used for sending uplink data by the terminal equipment;

the terminal equipment determines that downlink data sent by the network equipment in a downlink semi-persistent scheduling mode is not received between a first time domain position and a second time domain position; the subframe or time slot of the ending position of the transmission resource of the DCI is earlier than the first time domain position; the time interval between the first time domain position and the subframe or time slot where the ending position of the transmission resource of the DCI is located is the scheduling delay value indicated by the DCI; the interval between the second time domain position and the first time domain position is the first time length value.

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

the network equipment sends first configuration information to the terminal equipment, wherein the first configuration information is used for indicating the offset;

the network equipment determines that downlink data aiming at the terminal equipment is not sent between the first time domain position and the second time domain position;

the first time domain position is earlier than the second time domain position, the first time domain position is determined according to the offset, the second time domain position is determined according to a starting time domain position of a first uplink transmission resource, and the first uplink transmission resource is a resource used by the terminal device for sending uplink data.

In a possible implementation manner, the first configuration information is further used to indicate a first time length value, where the first time length value is not less than twice of a maximum differential time delay corresponding to a serving cell or a serving beam coverage area where the terminal device is located;

In a possible implementation manner, the network device does not send downlink data for the terminal device between the first time domain location and the second time domain location, including:

and the network equipment does not transmit data aiming at the terminal equipment between the first time domain position and the second time domain position in a Physical Downlink Control Channel (PDCCH) and/or downlink semi-persistent scheduling mode.

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

first configuration information sent by a network device to a terminal device, wherein the first configuration information is used for indicating an offset;

the network equipment sends downlink control information DCI to the terminal equipment, wherein the DCI is used for scheduling a first uplink transmission resource, and the first uplink transmission resource is a resource used for sending uplink data by the terminal equipment;

the network equipment transmits downlink data aiming at the terminal equipment between the first time domain position and the second time domain position without a downlink semi-persistent scheduling mode; wherein the first time domain position is earlier than the second time domain position, and the first time domain position is determined according to a subframe or a time slot where an end position of the transmission resource of the DCI is located; the second time domain position is determined according to the offset.

In one possible implementation manner, the ending position of the DCI transmission resource is located in a subframe or a time slot earlier than the first time domain position; the time interval between the first time domain position and the subframe or time slot where the ending position of the DCI transmission resource is located is the scheduling delay value; the time interval between the second time domain position and the first time domain position is the offset.

In one possible implementation manner, the network device does not send downlink data for the terminal device between the first time domain location and the second time domain location, including:

and the network equipment does not transmit data aiming at the terminal equipment between the first time domain position and the second time domain position in a downlink semi-persistent scheduling mode.

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

the network equipment sends second configuration information to the terminal equipment, wherein the second configuration information is used for indicating a first time length value, and the first time length value is not less than twice of the maximum differential time delay corresponding to a service cell or a service beam coverage area where the terminal equipment is located;

the network equipment sends downlink control information DCI to the terminal equipment, wherein the DCI is used for scheduling first uplink transmission resources, and the first uplink transmission resources are resources used for sending uplink data by the terminal equipment;

the network equipment transmits data to the terminal equipment between the first time domain position and the second time domain position without a downlink semi-persistent scheduling mode; the subframe or time slot of the ending position of the transmission resource of the DCI is earlier than the first time domain position; the time interval between the first time domain position and the subframe or time slot where the end position of the transmission resource of the DCI is located is the scheduling delay value indicated by the DCI; the interval between the second time domain position and the first time domain position is the first time length value.

In a seventh aspect, an embodiment of the present application provides a terminal device, including: a processor and a transceiver;

the transceiver is used for receiving signals or sending signals; the processor is configured to execute the computer executable instructions stored in the memory to cause the terminal device to perform the method according to the first aspect to the third aspect or any one of the possible implementation manners of the first aspect to the third aspect.

In an eighth aspect, an embodiment of the present application provides a network device, including: a processor and a transceiver;

the transceiver is used for receiving signals or sending signals; the processor is configured to execute the computer executable instructions stored by the memory to cause the network device to perform the method according to any one of the possible embodiments of the fourth to sixth aspects or the fourth to sixth aspects.

In a ninth aspect, an embodiment of the present application provides a data transmission system, where the data transmission system includes a terminal device and a network device; the terminal device is configured to perform the method according to the first aspect or any one of the first aspects, and the network device is configured to perform the method according to the fourth aspect or any one of the fourth aspects; alternatively, the terminal device is configured to perform any one of the methods according to the second aspect or the second aspect, and the network device is configured to perform any one of the methods according to the fifth aspect; alternatively, the terminal device is configured to perform any method as in the third aspect or the third aspect, and the network device is configured to perform any method as in the sixth aspect or the sixth aspect.

In a tenth aspect, the present application provides 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 computer program causes the method according to any one of the possible implementation manners of the first aspect to the sixth aspect or the first aspect to the sixth aspect to be performed.

In an eleventh aspect, the present application provides a computer program product comprising program instructions that, when executed by a processor, cause the processor to perform the method as in any one of the possible implementations of the first to sixth aspects or the first to sixth aspects.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments or the background art of the present application, the drawings used in the embodiments or the background art of the present application will be briefly described below.

Fig. 1 is a schematic architecture diagram of a communication system according to an embodiment of the present application;

FIG. 2 is a schematic diagram of a model for calculating a maximum differential delay value according to an embodiment of the present application;

fig. 3 is a schematic location diagram of an uplink preconfigured resource according to an embodiment of the present application;

fig. 4 is a schematic diagram of transmitting uplink data according to an embodiment of the present application;

fig. 5 is a schematic diagram of a delay provided in an embodiment of the present application;

fig. 6 is another schematic time delay diagram provided in the embodiment of the present application;

fig. 7 is a schematic flowchart of a data transmission method according to an embodiment of the present application;

FIG. 8 is a schematic diagram of a time domain location provided by an embodiment of the present application;

FIG. 9 is a schematic diagram of another time domain location provided by an embodiment of the present application;

fig. 10 is a schematic flowchart of another data transmission method provided in the embodiment of the present application;

FIG. 11 is a schematic diagram of yet another time domain location provided by an embodiment of the present application;

FIG. 12 is a diagram illustrating yet another time-domain location provided by an embodiment of the present application;

FIG. 13 is a schematic diagram of yet another time domain location provided by an embodiment of the present application;

fig. 14 is a schematic structural diagram of a terminal device according to an embodiment of the present application;

fig. 15 is a schematic structural diagram of a network device according to an embodiment of the present application;

fig. 16 is a schematic structural diagram of a communication device according to an embodiment of the present application.

Detailed Description

The terminology used in the following examples of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the specification of this application and the appended claims, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the listed items. 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.

NTN generally refers to a network for radio frequency transmission, such as a satellite or unmanned aerial vehicle (UAS) platform. Compared to a conventional terrestrial network, such as a Long Term Evolution (LTE) network, the NTN may use a satellite or a high-altitude platform (HAP) for network deployment.

Typical scenarios for NTN applications may include, but are not limited to, scenarios where base stations cannot be built, such as continuous coverage in remote mountainous areas, deserts, oceans, and forests; or a scene in which the base station is damaged, for example, emergency communication when a disaster occurs or the base station is damaged.

In order to more clearly describe the solution provided by the present application, the following detailed description is provided for the terms involved in the present application.

1. Network architecture

Referring to fig. 1, fig. 1 is a schematic diagram of a communication system according to an embodiment of the present disclosure.

As shown in fig. 1, the communication system includes a satellite, a terminal device, and a gateway (also called a ground station). The wireless link between the satellite and the terminal device may be referred to as a service link, the wireless link between the satellite and the gateway station may be referred to as a feedback link, and an inter-satellite link may exist between the satellite and the satellite for providing data backhaul.

Typically, one or several gateway stations of the communication system need to be connected to a Public Data Network (PDN), such as the network in fig. 1.

Illustratively, a terminal device can also be referred to as a User Equipment (UE), a terminal, 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 be a Mobile Station (MS), a subscriber unit (subscriber unit), a drone, an internet of things (IoT) device, a Station (ST) in a Wireless Local Area Network (WLAN), a cellular phone (cellular phone), a smart phone (smart phone), a cordless phone, a wireless data card, a tablet computer, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA) device, a laptop computer (laptop computer), a Machine Type Communication (MTC) terminal, a handheld device having a wireless communication function, a computing device, or other processing device connected to a wireless modem, a wearable device, or a wearable smart device (also referred to as a smart device). The terminal device may also be a terminal device in a next generation communication system, for example, a terminal device in a 5G system or a terminal device in a Public Land Mobile Network (PLMN) for future evolution, a terminal device in a New Radio (NR) system, and the like. In a non-terrestrial network, a cell may include one or more beams. As shown in fig. 1, one cell includes a plurality of beams.

In some embodiments, the base stations in the communication system may be located on the land, for example, the gateway station in fig. 1 may be capable of the base station. At this time, the satellite serves as a relay between the terminal device and the gateway station, receives data sent by the terminal device through a service link, and forwards the data to the gateway station on the ground.

In other embodiments, the base station in the communication system may be located on a satellite, for example, the satellite in fig. 1 may have the function of the base station. In this case, the satellite having the base station function may be considered as one of an evolved NodeB (eNB) and a 5G base station (gNB).

In the embodiment of the present application, the terminal device may communicate with the network device, and the network device may be understood as a device capable of performing data processing and network communication. Illustratively, the network device may include a base station (e.g., eNB, gNB, etc.) or an access device of a network, etc., which is not limited in this application. For convenience of description, the method related to the present application is exemplified below by taking a network device as a satellite with a base station function.

2. Maximum differential delay value

In non-terrestrial networks, the propagation delay between different locations within the cell or beam coverage and the network equipment is different.

For example, in this embodiment of the present application, the maximum differential delay value may be understood as a difference between a propagation delay corresponding to a position farthest from the network device and a propagation delay corresponding to a position closest to the network device in a certain cell or a certain beam coverage area.

Illustratively, if it is the maximum differential delay value calculated for the coverage of a certain cell, then the maximum differential delay value is the maximum differential delay value at the cell level. It is understood that the maximum differential delay values corresponding to different cells may be the same or different.

Illustratively, if it is the maximum differential delay value calculated for the coverage of a certain beam, then it is the maximum differential delay value at the beam level. It is understood that the maximum differential delay values corresponding to different beam coverage areas may be the same or different.

Specifically, fig. 2 is a schematic diagram of a model for calculating a maximum differential delay value according to an embodiment of the present application, and the schematic diagram shown in fig. 2 takes a coverage area of a beam as an example. As shown in fig. 2, d1 is the closest distance between the network device and the beam coverage area, and d2 is the farthest distance between the network device and the beam coverage area. It can be understood that the network device may calculate the maximum differential delay value corresponding to one cell or beam coverage area through the pythagorean theorem.

In the NTN network, since the network device is far from the ground and the coverage area of a cell or a beam formed by the network device is large, a large differential delay exists in a certain cell or a certain beam coverage area. For example, 2 times the maximum differential delay value of a synchronous network device is 20.6 milliseconds.

3. Scheduling

For example, the scheduling referred to in the present application may include dynamic scheduling and semi-persistent scheduling (SPS).

In this embodiment, the dynamic scheduling may be understood as that the network device makes a scheduling decision in each Transmission Time Interval (TTI), and notifies all scheduled terminal devices of the scheduling information through a control signaling.

In the embodiment of the present application, the downlink semi-persistent scheduling may also be referred to as semi-persistent scheduling or semi-persistent scheduling. Instead of allocating radio resources once per TTI for a terminal device in dynamic scheduling, SPS allows for semi-persistent configuration of radio resources and periodic allocation of the resources to a particular terminal device.

Specifically, in a certain TTI, the network device specifies a radio resource (referred to as SPS resource herein) used by a certain terminal device by using a Physical Downlink Control Channel (PDCCH) scrambled by a cell-radio network temporary identifier (C-RNTI), that is, the network device notifies the terminal device when to start semi-persistent scheduling through the PDCCH. Every one period (which may be understood as a period of semi-persistent scheduling), the terminal device may use the SPS resources to receive or transmit data. The network device does not need to issue a PDCCH in this subframe or slot (referred to herein as an SPS subframe) to specify the allocated resources, thereby saving transmission overhead of the control signaling PDCCH.

4. Pre-configured resource transmission

In the NTN network, the preconfigured resource transmission mode may include an uplink preconfigured resource transmission mode and a downlink preconfigured resource transmission mode.

Illustratively, the preconfigured resource transmission mode according to the embodiment of the present application includes an uplink preconfigured resource transmission mode.

In this embodiment of the present application, the uplink pre-configured resource transmission may be referred to as configuration grant (configured grant) uplink transmission, and includes a type 1 configuration grant (configured grant type 1) and a type 2 configuration grant (configured grant type 2).

For configured grant type 1, when the terminal device receives the higher layer configuration of configured grant type 1, the terminal device may determine the location of the uplink pre-configured resource according to the higher layer configuration of configured grant type 1, and transmit uplink data by using the uplink pre-configured resource.

Fig. 3 is a schematic location diagram of an uplink preconfigured resource according to an embodiment of the present application. As shown in fig. 3, the uplink pre-configured resource is periodic.

For the configured grant type 2, after the terminal device receives the higher layer configuration of the configured grant type 2, the terminal device needs to receive Downlink Control Information (DCI) sent by the network device, and determine whether the resources of the configured higher layer grant type 2 are available according to the downlink control information.

5. Offset K _ offset and TA value

In order to ensure uplink time synchronization between the terminal device and the network device, a TA value is introduced. In the NTN network, terminal equipment performs advance transmission according to the TA value when transmitting uplink data.

Exemplarily, fig. 4 is a schematic diagram for transmitting uplink data according to an embodiment of the present application. As shown in fig. 4, the network configures a periodic uplink transmission resource (which may be understood as a configuration grant type 1 or a configuration grant type 2) to the terminal device through a high-level signaling, and the terminal device needs to transmit in advance when transmitting uplink data by using the uplink transmission resource (the advance is a TA value determined by the terminal device). That is to say, the time domain position where the terminal device actually sends the uplink data is TA time units ahead of the time domain position of the uplink transmission resource configured by the network.

Since the distance between the network device and the terminal device in the NTN network is typically hundreds or thousands of kilometers, the transmission delay between the network device and the terminal device is significantly increased, resulting in a large TA in the NTN network.

For example, please refer to fig. 5, fig. 5 is a schematic diagram of a delay according to an embodiment of the present application. As shown in fig. 5, for the network device, the downlink subframe is aligned with the uplink subframe. The transmission delay between the network equipment and the terminal equipment (UE) is delay a. The TA value may be understood as a difference between a starting time domain position of a downlink subframe received by the terminal device and a starting time domain position of an uplink subframe transmitted by the terminal device.

Just because TA in the NTN network is large, in order to ensure that the terminal device has enough time to send the uplink data in advance, the offset value K _ offset is introduced.

Exemplarily, fig. 6 is another schematic diagram of a delay provided in the embodiment of the present application, where a scheduling delay of a PDCCH scheduling PUSCH is enhanced to K2+ K _ offset. That is, in the process of scheduling the PUSCH by the PDCCH, the downlink control information in the PDCCH indicates the scheduling delay value K2 and the offset value K _ offset to the terminal device. Then, the terminal device determines the transmission resource position of the PUSCH collectively according to the indicated K2 value and the offset value K _ offset. Therefore, a sufficiently large time interval between the PDCCH receiving time and the PUSCH transmitting time can be ensured to allow the terminal equipment to carry out early transmission.

In an NTN network, the TA value of each terminal device needs to be determined jointly according to a common TA (common TA) and a TA of a terminal device class. Illustratively, the TA value for a terminal device is equal to the common TA plus the TA for that terminal device class.

By way of example, a common TA may be understood as a TA value determined by the distance between the network device and a certain reference point, where the position of the reference point may be any position in the network device, the gateway station, or the service link or the feedback link. In some embodiments, the common TA may be understood as an RTT value between the reference point and the network device.

For example, the TA at the terminal device level may be understood as a TA value autonomously calculated by the terminal device according to the self-location information and the ephemeris information. The terminal equipment level TA means that different terminal equipments respectively calculate respective TA values, and since the distances between the positions of the different terminal equipments and the network equipment are different, the TA values calculated by the different terminal equipments are different from each other. In some embodiments, the TA at the terminal device level may be the round trip propagation delay between the terminal device and the network device.

It can be understood that, the terminal device sends the uplink data to the network device in advance according to the TA value, and the TA value of each terminal device is calculated by itself, so that the network device cannot know the specific time domain position where the terminal device actually sends the uplink data.

For a half-duplex, frequency Division Duplex (FDD) terminal, the terminal cannot receive and transmit data simultaneously. Uplink data sent by the terminal equipment may collide with downlink data sent by the network equipment in time, so that reliability of data transmission is reduced.

In some embodiments, the terminal device may indicate the TA value determined by itself by transmitting signaling to the network device, so that the network device may avoid a time when the terminal device sends the uplink data, thereby avoiding a collision between the uplink data and the downlink data. However, the terminal device sends signaling to the network device to notify the network device of the new TA value every time the TA value is updated, and signaling overhead is large.

In view of the above problems, an embodiment of the present application provides a data transmission method, where a time interval is determined according to an offset and a starting time domain position of an uplink transmission resource, and in the time interval, a terminal device does not receive downlink data sent by a network device, and meanwhile, the network device does not send the downlink data to the terminal device, so that collision between the uplink data sent by the terminal device and the downlink data sent by the network device in time is avoided, further resource collision is avoided, and reliability of data transmission is improved. For ease of understanding, the data transmission method provided in the present application will be explained below by combining a network device and a terminal device.

First, a data transmission method is introduced in a case where a network device configures a periodic uplink transmission resource for a terminal device. Referring to fig. 7, fig. 7 is a schematic flowchart illustrating a data transmission method according to an embodiment of the present application, where the method includes:

701: the network equipment sends first configuration information to the terminal equipment, wherein the first configuration information is used for indicating an offset. Correspondingly, the terminal equipment receives the first configuration information sent by the network equipment.

In the embodiment of the present application, the offset amount may be understood as the offset amount K _ offset of the 5 th part in the term. In general, the unit of K _ offset may be a subframe or a slot. For convenience of description, the method provided by the present application is explained below by taking K _ offset as an example.

It is to be understood that K _ offset is determined by the network device, and specifically, the network device may determine K _ offset by:

(2) If the terminal device does not feed back the TA value determined by itself to the network device, the network device may determine the TA value according to the RTT value between a certain reference point in its service area and the network device. Illustratively, the network device may determine K _ offset from the RTT value between the location farthest from the network device within its service area and the network device and the common TA value. Illustratively, the K _ offset determined by the network device is equal to the common TA plus the RTT value between the network device and the location within its service area that is farthest from the network device.

In step 701, in a specific implementation, the terminal device may receive the first configuration information sent by the network device after accessing the network device and acquiring downlink synchronization. The first configuration information may be, for example, system information (system information), and specifically, the terminal device may acquire the system information by listening to a Broadcast Control Channel (BCCH), so as to acquire K _ offset.

702: the network device determines not to send downlink data for the terminal device between the first time domain position and the second time domain position. Correspondingly, the terminal equipment determines that the downlink data sent by the network equipment is not received between the first time domain position and the second time domain position; the first time domain position is earlier than the second time domain position, the first time domain position is determined according to the offset, the second time domain position is determined according to a starting time domain position of a first uplink transmission resource, and the first uplink transmission resource is a resource used by the terminal equipment for sending uplink data.

It can be understood that, before the terminal device sends the uplink data to the network device, the time domain position of the uplink transmission resource configured for the terminal device by the network device must be determined. In this embodiment of the present application, the first uplink transmission resource may be understood as an uplink transmission resource configured by the network device for the terminal device.

It can be understood that, since the first time domain position is determined according to K _ offset, the second time domain position is determined according to the starting time domain position of the first uplink transmission resource, and K _ offset is greater than or equal to the TA value determined by the terminal device, the actual position of the terminal device for sending uplink data may fall within the interval formed by the first time domain position to the second time domain position.

Therefore, in the interval formed by the first time domain position and the second time domain position, the terminal equipment does not receive the downlink data sent by the network equipment; accordingly, in the interval formed by the first time domain position and the second time domain position, the network device does not send the downlink data aiming at the terminal device, so that the uplink data sent by the terminal device and the downlink data sent by the network device can be prevented from colliding in time, and the reliability of data transmission is further improved.

Next, the downlink data that is not received by the terminal device and the downlink data that is not transmitted by the network device are explained.

It can be understood that the manner in which the network device according to the embodiment of the present application sends the downlink data includes: the network equipment sends downlink data to the terminal equipment in a dynamic scheduling mode and a downlink semi-persistent scheduling mode.

(1) For the dynamic scheduling manner, for example, the network device may send data through a DCI dynamic scheduling Physical Downlink Shared Channel (PDSCH). It can be understood that, when the network device issues data in a dynamic scheduling manner, it is ensured that the data does not fall within an interval formed by the first time domain position and the second time domain position.

(2) For the semi-persistent scheduling mode, for example, the network device may periodically send downlink data to the terminal device by using the downlink transmission resource. It is to be understood that the periodic downlink transmission resource may have one or more downlink transmission resources that fall within an interval from the first time domain position to the second time domain position. And on the downlink transmission resource in the interval from the first time domain position to the second time domain position, the network equipment does not send downlink data.

In addition, the terminal device monitors the PDCCH to receive the DCI periodically, and there may be one or more PDCCH monitoring occasions falling within an interval from the first time domain position to the second time domain position during the periodic PDCCH monitoring. And the terminal equipment does not monitor the PDCCH at the PDCCH monitoring opportunity in the interval from the first time domain position to the second time domain position.

In this embodiment, that the terminal device does not receive the downlink data sent by the network device may be understood as that the terminal device does not receive data issued by the network device in a downlink semi-persistent scheduling manner and downlink control information sent by the PDCCH.

Accordingly, the network device does not transmit downlink data for the terminal device may be understood as the network device does not transmit data for the terminal device through the PDCCH and/or downlink semi-persistent scheduling.

In some embodiments, the time interval between the first time domain location and the second time domain location is the offset; the second time domain position is a starting time domain position of the first uplink transmission resource.

For example, referring to fig. 8, fig. 8 is a schematic diagram of a time domain location according to an embodiment of the present application, and each shaded rectangle in fig. 8 may be understood as the first uplink transmission resource. As shown in fig. 8, the first uplink transmission resource is periodic and may be referred to as an uplink pre-configured resource (UL configuration grant). That is, the terminal device may periodically transmit uplink data to the network device using the uplink pre-configured resource.

In fig. 8, 3 UL configuration grants are shown. For ease of understanding, the method provided in the embodiments of the present application is described below by taking the 1 st UL configuration grant as an example, and the 1 st UL configuration grant is referred to as the first UL configuration grant.

The terminal device determines the K _ offset and the starting time domain position of the first UL configuration grant. Illustratively, the terminal device may determine the K _ offset and the starting time domain position of the first UL configuration grant by receiving system information transmitted by the network device.

In this embodiment, the starting time domain position of the first UL configuration grant, i.e. the time domain position n in fig. 8, can be understood as the second time domain position. The time domain position corresponding to the K _ offset time unit before the starting time domain position of the first UL configuration grant, i.e. the time domain position n-K _ offset in fig. 8, can be understood as the first time domain position.

The terminal equipment does not receive data issued by the network equipment in a downlink semi-persistent scheduling mode and downlink control information sent by a PDCCH (physical downlink control channel) in an interval consisting of time domain positions n-K _ offset to n; accordingly, the network device does not transmit data for the terminal device in the interval formed by the time domain positions n-K _ offset to n by means of PDCCH and/or downlink semi-persistent scheduling.

It can be understood that K _ offset is a parameter configured on the network device side. Typically, K _ offset is greater than or equal to the TA value determined by the terminal device. That is, the time when the terminal device sends the uplink data in advance according to the TA value must fall between the time domain positions n-K _ offset to n.

Therefore, in the interval formed by the time domain positions n-K _ offset to n, the network device does not send the downlink data for the terminal device, and the terminal device does not receive the downlink data sent by the network device, so that the time when the terminal device sends the data up can be avoided to be the same as the time when the network device sends the data down, thereby avoiding the uplink data sent by the terminal device from colliding with the downlink data sent by the network device in time, and further improving the reliability of data transmission.

In some embodiments, the first configuration information is further configured to indicate a first time length value, where the first time length value is not less than twice of a maximum differential delay corresponding to a serving cell or a serving beam coverage area where the terminal device is located;

the first time domain position and the second time domain position are earlier than the starting time domain position of the first uplink transmission resource; a time interval between the first time domain position and a starting time domain position of the first uplink transmission resource is equal to the offset; the time interval between the second time domain position and the starting time domain position of the first uplink transmission resource is equal to the difference between the offset and the first time length value.

It can be understood that, although the network device does not know the TA value determined by the terminal device through autonomous calculation, and does not know the specific time domain position of the uplink data sent by the terminal device, the network device may determine the value range of the TA value of the terminal device according to the first time length value.

In this embodiment, the first time length value may be understood as a value determined by a maximum differential time delay value, and the first time length value is not less than 2 times of a maximum differential time delay corresponding to a serving cell or a serving beam coverage area where the terminal device is located. The maximum differential delay value can be understood as the difference between the RTT corresponding to the farthest point from the satellite and the RTT corresponding to the closest point from the satellite in a cell or a beam coverage area. For a specific explanation of the maximum differential delay value, reference may be made to section 2 of the above terminology section, which is not described herein in detail.

For example, after the network device determines the first duration value, the size of the first duration value may be indicated to the terminal device through the first configuration information. It should be noted that the first time value and the K _ offset may also be separately indicated, and the application is not limited thereto.

Exemplarily, fig. 9 is a schematic diagram of another time domain position provided in an embodiment of the present application. It can be understood that the TA value determined by the terminal device through autonomous calculation may be K _ offset at maximum, that is, the terminal device may transmit uplink data at the time domain position n-K _ offset at the earliest. The minimum TA value determined by the terminal device through autonomous calculation may be K _ offset-T, where T may be understood as the first time length value, that is, the terminal device may transmit uplink data at time domain position n-K _ offset + T at the latest. Therefore, the actual start position of the uplink data transmission from the terminal device will fall within the interval from n-K _ offset to n-K _ offset + T.

In this embodiment, the time domain position n-K _ offset can be understood as the first time domain position, and the time domain position n-K _ offset + T can be understood as the second time domain position. It can be understood that, as shown in fig. 9, the time interval between the first time domain position and the starting time domain position of the first uplink transmission resource (i.e., n in fig. 9) is K _ offset. The time interval between the second time domain position and the starting time domain position of the first uplink transmission resource is equal to K _ offset-T.

In this embodiment, in an interval formed by time domain positions n-K _ offset to n-K _ offset + T, the terminal device does not receive data issued by the network device in a downlink semi-persistent scheduling manner and downlink control information sent by a PDCCH; correspondingly, the network equipment does not transmit the data aiming at the terminal equipment in a PDCCH (physical Downlink control channel) and/or downlink semi-persistent scheduling mode, so that the uplink data transmitted by the terminal equipment and the downlink data transmitted by the network equipment are prevented from colliding in time, and the reliability of data transmission is improved. Meanwhile, compared with the previous embodiment, the interval formed by the time domain positions in this embodiment is smaller, that is, the network device may send downlink data on more resources, which may improve the resource utilization.

The data transmission method is suitable for the situation that the network equipment configures the terminal equipment with the periodic uplink transmission resources, and then introduces the data transmission method under the situation that the network equipment configures the terminal equipment with the uplink transmission resources in a dynamic scheduling mode.

Fig. 10 is a schematic flowchart of another data transmission method provided in an embodiment of the present application, where the method includes:

1001: the network equipment sends first configuration information to the terminal equipment, wherein the first configuration information is used for indicating an offset. Accordingly, the terminal device receives the first configuration information sent by the network device.

Specifically, refer to the description of step 701, which is not repeated herein.

1002: the network device sends DCI to the terminal device, where the DCI is used to schedule a first uplink transmission resource, and the first uplink transmission resource is a resource used by the terminal device to send uplink data. Accordingly, the terminal device receives the DCI.

In some embodiments, the DCI is configured to indicate a scheduling delay value, and the scheduling delay value and the offset are used to determine a starting time domain position of the first uplink transmission resource.

Exemplarily, after receiving the uplink grant information in the DCI sent by the network device, the terminal device determines the starting time domain position of the uplink transmission resource according to the scheduling delay value and the K _ offset indicated by the uplink grant information. In general, the time interval between the time when the terminal device transmits uplink data and the subframe or slot where the end position of the DCI transmission resource is located is the sum of the scheduling delay value and the K _ offset time.

For convenience of description, the scheduling delay value k will be described later.

1003: the network equipment determines that data aiming at the terminal equipment is not sent between the first time domain position and the second time domain position in a downlink semi-persistent scheduling mode; correspondingly, the terminal equipment does not receive downlink data sent by the network equipment between the first time domain position and the second time domain position; wherein the first time domain position is earlier than the second time domain position, and the first time domain position is determined according to a subframe or a time slot where an end position of the transmission resource of the DCI is located; the second time domain position is determined according to the offset.

It can be understood that, for both the terminal device and the network device, the subframe or timeslot occupied by the PDCCH is known, the subframe or timeslot where the end position of the transmission resource for the network device to send DCI to the terminal device is located is used to determine the first time domain position, K _ offset is used to determine the second time domain position, and K _ offset is greater than or equal to the TA value of the terminal device, so that the actual position of the terminal device to send uplink data may fall within the interval from the first time domain position to the second time domain position.

Therefore, in the interval formed by the first time domain position and the second time domain position, the terminal device does not receive the downlink data sent by the network device; correspondingly, in the interval formed by the first time domain position and the second time domain position, the network device does not send the downlink data aiming at the terminal device, so that the uplink data sent by the terminal device and the downlink data sent by the network device can be prevented from colliding in time, and the reliability of data transmission is further improved.

In this embodiment, the downlink data sent by the network device includes data sent by the network device in a downlink semi-persistent scheduling manner; the network device does not send downlink data for the terminal device includes that the network device does not send data to the terminal device in a downlink semi-persistent scheduling mode.

In still other embodiments, the first time domain position is a subframe or a time slot in which an end position of a transmission resource of the DCI is located; the time interval between the second time domain position and the first time domain position is the sum of the time of the scheduling delay value and the offset.

Exemplarily, referring to fig. 11, fig. 11 is a schematic diagram of another time domain position provided in the embodiment of the present application.

As shown in fig. 11, the terminal device receives DCI sent by the network device, where a subframe or a slot where an end position of a transmission resource of the DCI is located is n1, and a start time domain position of an uplink transmission resource, that is, a start position of a PUSCH in fig. 11, may be determined according to K and K _ offset indicated by the DCI.

As shown in fig. 11, the time interval between the subframe or slot where the end position of the transmission resource of the DCI received by the terminal device is located and the start time domain position of the PUSCH is K + K _ offset.

In this embodiment, the terminal device determines a time domain position n1, where the time domain position n1 may be understood as the first time domain position; the time domain position corresponding to the time unit K + K _ offset after the time domain position n1, i.e. the position n1+ K _ offset in fig. 11, can be understood as the second time domain position.

In the interval formed by n1 to n1+ K _ offset, the terminal device does not receive the downlink data sent by the network device; accordingly, the network device does not transmit downlink data for the terminal device.

It can be understood that the time domain positions where the terminal device sends the uplink data in advance according to the autonomously calculated TA value will certainly fall between the time domain positions n1 to n1+ K _ offset. Therefore, in the interval formed by n1 to n1+ K _ offset, the network device does not send the downlink data for the terminal device, and the terminal device does not receive the downlink data sent by the network device, so that the uplink data sent by the terminal device and the downlink data sent by the network device can be prevented from colliding in time, and the reliability of data transmission is further improved.

Alternatively, the second temporal position may be adjusted forward by 1 or 2 time units. For example, n1+ K _ offset-1 may be used as the second time domain position, that is, in the interval of n1 to n1+ K _ offset-1, the network device does not transmit downlink data for the terminal device, and the terminal device does not receive downlink data transmitted by the network device.

In still other embodiments, the ending position of the transmission resource of the DCI is located in a subframe or slot earlier than the first time domain position; the time interval between the first time domain position and the subframe or time slot where the ending position of the DCI transmission resource is located is the scheduling delay value; the time interval between the second time domain position and the first time domain position is the offset.

Exemplarily, referring to fig. 12, fig. 12 is a schematic diagram of another time domain location provided by the embodiment of the present application.

In this embodiment, the terminal device determines a subframe or a time slot, i.e., a time domain position n1, where an ending position of a transmission resource for receiving DCI is located, and may determine a time domain position n1+ k according to k, where the time domain position n1+ k may be understood as the first time domain position.

Further, the terminal device may determine the time domain position n1+ K _ offset according to K and K _ offset, and the time of the time domain position n1+ K _ offset may be understood as the second time domain position. It will be appreciated that the time interval between the first time domain position and time domain position n1 is equal to K, and the time interval between the time instant of time domain position n1+ K _ offset and the first time domain position is equal to K _ offset.

It can be understood that K _ offset is a parameter configured on the network device side. Typically, the offset K _ offset is greater than or equal to the TA value determined by the terminal device. That is, the timing at which the terminal device transmits uplink data in advance according to the TA value must fall between n1+ K to n1+ K _ offset.

Alternatively, the second temporal position may be adjusted forward by 1 or 2 time units. Illustratively, the time domain position n1+ K _ offset-1 may be understood as the second time domain position, and in an interval from n1+ K to n1+ K _ offset-1, the network device does not send downlink data for the terminal device, and the terminal device does not receive downlink data sent by the network device, so that collision between uplink data sent by the terminal device and downlink data sent by the network device in time can be avoided, and reliability of data transmission is further improved.

In this embodiment, the downlink data sent by the network device includes data sent by the network device in a downlink semi-persistent scheduling manner; the network device does not send downlink data for the terminal device includes that the network device does not send data to the terminal device in a downlink semi-persistent scheduling manner.

In still other embodiments, the terminal device receives second configuration information sent by the network device, where the second configuration information is used to indicate a first time length value, and the first time length value is not less than twice of a maximum differential delay corresponding to a serving cell or a serving beam coverage area where the terminal device is located;

the terminal equipment receives DCI, wherein the DCI is used for scheduling first uplink transmission resources, and the first uplink transmission resources are resources used for sending uplink data by the terminal equipment;

the terminal equipment does not receive downlink data sent by the network equipment between the first time domain position and the second time domain position; the subframe or time slot of the ending position of the transmission resource of the DCI is earlier than the first time domain position; the time interval between the first time domain position and the subframe or time slot where the ending position of the DCI transmission resource is located is the scheduling delay value; the interval between the second time domain position and the first time domain position is the first time length value.

It can be understood that, although the network device does not know the TA value determined by the terminal device through autonomous calculation, and does not know the specific time domain position of the uplink data sent by the terminal device, the network device may determine the value range of the TA value through the first time length value.

In this embodiment, the first time length value may be understood as a maximum differential delay value, where the first time length value is not less than 2 times of a maximum differential delay corresponding to a serving cell or a serving beam coverage area where the terminal device is located. The maximum differential delay value may be understood as the difference between the RTT corresponding to the farthest point from the satellite and the RTT corresponding to the nearest point from the satellite within a cell or a beam coverage area. For a detailed explanation, reference is made to section 2 of the above terminology section, which is not described in detail here.

For example, after the network device determines the first duration value, the size of the first duration may be indicated to the terminal device through the second configuration information.

Exemplarily, fig. 13 is a schematic diagram of another time domain position provided in this embodiment, and the TA value determined by the terminal device through autonomous calculation may be at most K _ offset, that is, the terminal device may transmit uplink data at time domain position n1+ K earliest. The terminal device autonomously calculates and determines that the TA value may be K _ offset-T, where T may be understood as the first time length value, that is, the terminal device may transmit uplink data at time domain position n1+ K + T at the latest. Therefore, the actual time domain position of the terminal device for sending the uplink data is in the interval formed by the time domain positions n1+ k to n1+ k + T.

In this embodiment, as shown in fig. 13, the time domain position n1+ k may be understood as the first time domain position, and the time domain position n1+ k + T may be understood as the second time domain position. It will be appreciated that the time interval between the first time domain position and the time domain position n1 is k; the time interval between the second time domain position and the first time domain position is T.

Alternatively, the second temporal position may be adjusted forward by 1 or 2 time units. Exemplarily, the time domain position n1+ k + T-1 may be understood as the second time domain position, and in an interval formed by the time domain positions n1+ k to n1+ k + T-1, the network device does not send downlink data for the terminal device, and the terminal device does not receive the downlink data sent by the network device, so as to avoid that uplink data sent by the terminal device and downlink data sent by the network device collide with each other in time, thereby improving reliability of data transmission. Meanwhile, compared with the previous embodiment, the interval formed by the time domain positions in this embodiment is smaller, that is, the network device may send downlink data on more resources, which may improve the resource utilization.

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

Referring to fig. 14, fig. 14 is a schematic structural diagram of a terminal device according to an embodiment of the present disclosure. As shown in fig. 14, the terminal device 140 described above includes a receiving unit 1401 and a determining unit 1402, and the respective units are described as follows:

in a first implementation:

a receiving unit 1401, configured to receive first configuration information sent by a network device, where the first configuration information is used to indicate an offset;

a determining unit 1402, configured to determine that downlink data sent by the network device is not received between the first time domain position and the second time domain position; the first time domain position is earlier than the second time domain position, the first time domain position is determined according to the offset, the second time domain position is determined according to a starting time domain position of a first uplink transmission resource, and the first uplink transmission resource is a resource used by the terminal device for sending uplink data.

Optionally, a time interval between the first time domain position and the second time domain position is the offset; the second time domain position is a starting time domain position of the first uplink transmission resource.

Optionally, the first configuration information is further configured to indicate a first time length value, where the first time length value is not less than twice of a maximum differential delay corresponding to a serving cell or a serving beam coverage area where the terminal device is located; the first time domain position and the second time domain position are earlier than the starting time domain position of the first uplink transmission resource; a time interval between the first time domain position and the starting time domain position of the first uplink transmission resource is equal to the offset; the time interval between the second time domain position and the starting time domain position of the first uplink transmission resource is equal to the difference between the offset and the first time length value.

Optionally, the downlink data sent by the network device includes data sent by the network device through a physical downlink control channel PDCCH and/or data sent by the network device through a downlink semi-persistent scheduling manner.

In a second implementation:

a receiving unit 1401, further configured to receive downlink control information DCI, where the DCI is used to determine a first uplink transmission resource, and the first uplink transmission resource is a resource used by the terminal device to send uplink data;

a determining unit 1402, configured to determine that data sent by the network device in a downlink semi-persistent scheduling manner is not received between the first time domain position and the second time domain position; wherein the first time domain position is earlier than the second time domain position, and the first time domain position is determined according to a subframe or a time slot where an end position of the transmission resource of the DCI is located; the second time domain position is determined according to the offset.

Optionally, the DCI is configured to indicate a scheduling delay value, and the scheduling delay value and the offset are used to determine a starting time domain position of the first uplink transmission resource.

Optionally, the first time domain position is a subframe or a time slot where an ending position of the transmission resource of the DCI is located; the time interval between the second time domain position and the first time domain position is the time sum of the scheduling delay value and the offset.

Optionally, the subframe or slot where the end position of the transmission resource of the DCI is located is earlier than the first time domain position; the time interval between the first time domain position and the subframe or time slot where the ending position of the DCI transmission resource is located is the scheduling delay value; the time interval between the second time domain position and the first time domain position is the offset.

In a third implementation:

a receiving unit 1401, configured to receive second configuration information sent by a network device, where the second configuration information is used to indicate a first time length value, and the first time length value is not less than twice of a maximum differential delay corresponding to a serving cell or a serving beam coverage area where the terminal device is located;

a receiving unit 1401, further configured to receive downlink control information DCI, where the DCI is used to schedule a first uplink transmission resource, and the first uplink transmission resource is a resource used by the terminal device to transmit uplink data;

a determining unit 1402, configured to determine that downlink data sent by the network device in a downlink semi-persistent scheduling manner is not received between the first time domain position and the second time domain position; the subframe or time slot of the ending position of the transmission resource of the DCI is earlier than the first time domain position; the time interval between the first time domain position and the subframe or time slot where the end position of the transmission resource of the DCI is located is the scheduling delay value indicated by the DCI; the interval between the second time domain position and the first time domain position is the first time length value.

Referring to fig. 15, fig. 15 is a schematic structural diagram of a network device according to an embodiment of the present disclosure. As shown in fig. 15, the above-described network device 150 includes a transmission unit 1501 and a determination unit 1502, and the respective units are described as follows:

in a first implementation:

a sending unit 1501 configured to send first configuration information to a terminal device, the first configuration information indicating an offset;

a determining unit 1502, configured to determine that downlink data for the terminal device is not sent between the first time domain position and the second time domain position; the first time domain position is earlier than the second time domain position, the first time domain position is determined according to the offset, the second time domain position is determined according to a starting time domain position of a first uplink transmission resource, and the first uplink transmission resource is a resource used by the terminal equipment for sending uplink data.

Optionally, the first configuration information is further configured to indicate a first time length value, where the first time length value is not less than twice of a maximum differential time delay corresponding to a serving cell or a serving beam coverage area where the terminal device is located;

the first time domain position and the second time domain position are earlier than the starting time domain position of the first uplink transmission resource; a time interval between the first time domain position and the starting time domain position of the first uplink transmission resource is equal to the offset; the time interval between the second time domain position and the starting time domain position of the first uplink transmission resource is equal to the difference between the offset and the first time length value.

Optionally, the sending unit 1501 is specifically configured to send, between the first time domain position and the second time domain position, data for the terminal device without using a PDCCH and/or a downlink semi-persistent scheduling.

In a second implementation:

a sending unit 1501, configured to send first configuration information to a terminal device, where the first configuration information is used to indicate an offset;

a sending unit 1501, further configured to send downlink control information DCI to the terminal device, where the DCI is used to schedule a first uplink transmission resource, and the first uplink transmission resource is a resource used by the terminal device to send uplink data;

a determining unit 1502, configured to determine that downlink data for the terminal device is not sent between the first time domain position and the second time domain position; wherein the first time domain position is earlier than the second time domain position, and the first time domain position is determined according to a subframe or a time slot where an end position of the transmission resource of the DCI is located; the second time domain position is determined from the offset.

Optionally, the ending position of the transmission resource of the DCI is located in a subframe or a slot earlier than the first time domain position; the time interval between the first time domain position and the subframe or time slot where the end position of the transmission resource of the DCI is located is the scheduling delay value; the time interval between the second time domain position and the first time domain position is the offset.

Optionally, the sending unit 1501 is specifically configured to send, between the first time domain position and the second time domain position, data for the terminal device without using a downlink semi-persistent scheduling manner.

In a third implementation:

a sending unit 1501, configured to send second configuration information to a terminal device, where the second configuration information is used to indicate a first time length value, and the first time length is not less than twice of a maximum differential time delay corresponding to a serving cell or a serving beam coverage area where the terminal device is located;

a sending unit 1501, configured to send downlink control information DCI to the terminal device, where the DCI is used for the terminal device to determine a first uplink transmission resource, and the first uplink transmission resource is a resource used by the terminal device to send uplink data;

a determining unit 1502, configured to determine that downlink data for the terminal device is not sent between the first time domain position and the second time domain position; the subframe or time slot of the ending position of the transmission resource of the DCI is earlier than the first time domain position; the time interval between the first time domain position and the subframe or time slot where the end position of the transmission resource of the DCI is located is the scheduling delay value indicated by the DCI; the interval between the second time domain position and the first time domain position is the first time length value.

Referring to fig. 16, fig. 16 is a schematic structural diagram of a communication device according to an embodiment of the present disclosure. The communication device 160 shown in fig. 16 may be the terminal device 140 or the network device 150.

As shown in fig. 16. The communication apparatus 160 includes at least one processor 1602, configured to implement the functions of the terminal device in the method provided in the embodiment of the present application; or, the method and the device are used for implementing the functions of the network device in the method provided by the embodiment of the application. The communication device 160 may also include a transceiver 1601. The transceiver 1601 is used for communication with other devices/apparatuses through a transmission medium. The processor 1602 transmits and receives data and/or signaling using the transceiver 1601 and is configured to implement the methods of the above-described method embodiments.

Optionally, communication device 160 may also include at least one memory 1603 for storing program instructions and/or data. The memory 1603 is coupled to the processor 1602. The coupling in the embodiments of the present application is an indirect coupling or a communication connection between devices, units or modules, and may be an electrical, mechanical or other form for information interaction between the devices, units or modules. Processor 1602 may operate in conjunction with memory 1603. The processor 1602 may execute program instructions stored in memory 1603. At least one of the at least one memory may be included in the processor.

The embodiment of the present application does not limit the specific connection medium among the transceiver 1601, the processor 1602, and the memory 1603. In the embodiment of the present application, the memory 1603, the processor 1602 and the transceiver 1601 are connected by the bus 1604 in fig. 16, the bus is indicated by a thick line in fig. 16, and the connection manner between other components is merely 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 thick line is shown in FIG. 16, but this is not intended to represent only one bus or type of bus.

In the embodiments of the present application, the processor may be a general-purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component, and may implement or execute the methods, steps, and logic blocks disclosed in the embodiments of the present application. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in a processor.

It is understood that when the communication device 160 is the terminal apparatus 140 described above, the actions performed by the receiving unit 1401 may be performed by the transceiver 1601 and the actions performed by the determining unit 1402 may be performed by the processor 1602. Alternatively, when the communication apparatus 160 is the network device 150 described above, the actions performed by the transmission unit 1501 may be performed by the transceiver 1601, and the actions performed by the determination unit 1502 may be performed by the processor 1602.

The present application also provides a computer-readable storage medium having stored therein computer code which, when run on a computer, causes the computer to perform the method of the above-described embodiment.

The present application also provides a computer program product comprising computer code or a computer program which, when run on a computer, causes the method of the above embodiments to be performed.

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 above claims.

Claims

1. A method of data transmission, the method comprising:

the method comprises the steps that terminal equipment receives first configuration information sent by network equipment, wherein the first configuration information is used for indicating offset;

the terminal equipment determines that downlink data sent by the network equipment are not received between a first time domain position and a second time domain position;

2. The method of claim 1, wherein a time interval between the first time domain location and the second time domain location is the offset; the second time domain position is a starting time domain position of the first uplink transmission resource.

3. The method of claim 1, wherein the first configuration information is further used to indicate a first time length value, and the first time length value is not less than twice of a maximum differential delay corresponding to a serving cell or a serving beam coverage area where the terminal device is located;

a time interval between the first time domain position and a starting time domain position of the first uplink transmission resource is equal to the offset; a time interval between the second time domain position and a starting time domain position of the first uplink transmission resource is equal to a difference between the offset and the first time length value.

4. The method according to any of claims 1 to 3, wherein the downlink data transmitted by the network device comprises data transmitted by the network device through a Physical Downlink Control Channel (PDCCH) and/or data transmitted by the network device through a downlink semi-persistent scheduling manner.

5. A method of data transmission, the method comprising:

the terminal equipment receives Downlink Control Information (DCI), wherein the DCI is used for scheduling first uplink transmission resources, and the first uplink transmission resources are resources used for sending uplink data by the terminal equipment;

the terminal equipment determines that data sent by the network equipment in a downlink semi-persistent scheduling mode is not received between a first time domain position and a second time domain position; the first time domain position is earlier than the second time domain position, and the first time domain position is determined according to a subframe or a time slot where the end position of the transmission resource of the DCI is located; the second time domain position is determined according to the offset.

6. The method of claim 5, wherein the DCI is configured to indicate a scheduling delay value, and wherein the scheduling delay value and the offset are configured to determine a starting time domain position of the first uplink transmission resource.

7. The method of claim 6, wherein the first time domain position is a subframe or a slot where an end position of the transmission resource of the DCI is located; the time interval between the second time domain position and the first time domain position is the sum of the time of the scheduling delay value and the offset.

8. The method of claim 6, wherein the end position of the transmission resource of the DCI is located in a subframe or a time slot earlier than the first time domain position; the time interval between the first time domain position and the subframe or time slot where the end position of the transmission resource of the DCI is located is the scheduling delay value; the time interval between the second time domain position and the first time domain position is the offset.

9. A method of data transmission, the method comprising:

the method comprises the steps that terminal equipment receives second configuration information sent by network equipment, wherein the second configuration information is used for indicating a first time length value, and the first time length value is not less than twice of a maximum differential time delay corresponding to a service cell or a service beam coverage area where the terminal equipment is located;

the terminal equipment determines that downlink data sent by the network equipment in a downlink semi-persistent scheduling mode is not received between a first time domain position and a second time domain position;

the subframe or the time slot of the end position of the transmission resource of the DCI is earlier than the first time domain position; a time interval between the first time domain position and a subframe or a time slot where an ending position of the transmission resource of the DCI is located is a scheduling delay value indicated by the DCI; the interval between the second time domain position and the first time domain position is the first time length value.

10. A method of data transmission, the method comprising:

the method comprises the steps that network equipment sends first configuration information to terminal equipment, wherein the first configuration information is used for indicating offset;

the network equipment determines that downlink data aiming at the terminal equipment is not sent between a first time domain position and a second time domain position; the first time domain position is earlier than the second time domain position, the first time domain position is determined according to the offset, the second time domain position is determined according to a starting time domain position of a first uplink transmission resource, and the first uplink transmission resource is a resource used by the terminal device for sending uplink data.

11. The method of claim 10, wherein a time interval between the first time domain location and the second time domain location is the offset; the second time domain position is a starting time domain position of the first uplink transmission resource.

12. The method of claim 10, wherein the first configuration information is further used to indicate a first time length value, and the first time length value is not less than twice of a maximum differential delay corresponding to a serving cell or a serving beam coverage area where the terminal device is located;

13. The method according to any one of claims 10-12, wherein the network device determining not to transmit downlink data for the terminal device between the first time domain location and the second time domain location comprises:

and the network equipment determines that data aiming at the terminal equipment is not sent between the first time domain position and the second time domain position in a Physical Downlink Control Channel (PDCCH) and/or downlink semi-persistent scheduling mode.

14. A method of data transmission, the method comprising:

the network equipment sends Downlink Control Information (DCI) to the terminal equipment, wherein the DCI is used for scheduling first uplink transmission resources, and the first uplink transmission resources are used for sending uplink data by the terminal equipment;

the network equipment determines that data aiming at the terminal equipment is not sent between a first time domain position and a second time domain position in a downlink semi-persistent scheduling mode; the first time domain position is earlier than the second time domain position, and the first time domain position is determined according to a subframe or a time slot where the end position of the transmission resource of the DCI is located; the second time domain position is determined according to the offset.

15. The method of claim 14, wherein the DCI is configured to indicate a scheduling delay value, and wherein the scheduling delay value and the offset are used to determine a starting time domain position of the first uplink transmission resource.

16. The method of claim 15, wherein the first time domain position is a subframe or a time slot where an end position of a transmission resource of the DCI is located; the time interval between the second time domain position and the first time domain position is the time sum of the scheduling delay value and the offset.

17. The method of claim 15, wherein the end position of the transmission resource of the DCI is located in a subframe or time slot earlier than the first time domain position; the time interval between the first time domain position and the subframe or time slot where the end position of the transmission resource of the DCI is located is the scheduling delay value; the time interval between the second time domain position and the first time domain position is the offset.

18. A method of data transmission, the method comprising:

the network equipment sends Downlink Control Information (DCI) to the terminal equipment, wherein the DCI is used for scheduling first uplink transmission resources, and the first uplink transmission resources are resources used for sending uplink data by the terminal equipment;

the network equipment determines that data is not sent to the terminal equipment between the first time domain position and the second time domain position in a downlink semi-persistent scheduling mode; the subframe or the time slot of the ending position of the transmission resource of the DCI is earlier than the first time domain position; the time interval between the first time domain position and the subframe or time slot where the end position of the transmission resource of the DCI is located is the scheduling delay value indicated by the DCI; the interval between the second time domain position and the first time domain position is the first time length value.

19. A data transmission apparatus, characterized in that the apparatus comprises:

a receiving unit, configured to receive first configuration information sent by a network device, where the first configuration information is used to indicate an offset;

a determining unit, configured to determine that data sent by the network device is not received between the first time domain location and the second time domain location; the first time domain position is earlier than the second time domain position, the first time domain position is determined according to the offset, the second time domain position is determined according to a starting time domain position of a first uplink transmission resource, and the first uplink transmission resource is a resource used by the terminal device for sending uplink data.

20. A data transmission apparatus, characterized in that the apparatus comprises:

a sending unit, configured to send first configuration information to a terminal device, where the first configuration information is used to indicate an offset;

a determining unit, configured to determine that downlink data is not sent to the terminal device between the first time domain position and the second time domain position; the first time domain position is earlier than the second time domain position, the first time domain position is determined according to the offset, the second time domain position is determined according to a starting time domain position of a first uplink transmission resource, and the first uplink transmission resource is a resource used by the terminal device for sending uplink data.

21. A terminal device, comprising: a processor and a transceiver;

the transceiver is used for receiving signals or sending signals; the processor is configured to execute computer-executable instructions stored in the memory to cause the terminal device to perform the method of any one of claims 1-10.

22. A network device, comprising: a processor and a transceiver;

the transceiver is used for receiving signals or sending signals; the processor to execute computer-executable instructions stored by the memory to cause the network device to perform the method of any of claims 11-20.

23. A computer-readable storage medium, having stored thereon a computer program which, when run on one or more processors, causes the method of any of claims 1-10 or the method of any of claims 11-20 to be performed.