CN116095728A

CN116095728A - Data transmission method and related product

Info

Publication number: CN116095728A
Application number: CN202111310512.4A
Authority: CN
Inventors: 雷珍珠
Original assignee: Spreadtrum Semiconductor Nanjing Co Ltd
Current assignee: Spreadtrum Semiconductor Nanjing Co Ltd
Priority date: 2021-11-05
Filing date: 2021-11-05
Publication date: 2023-05-09
Also published as: WO2023078385A1

Abstract

The embodiment of the application discloses a data transmission method and a related product terminal, wherein the data transmission method and the related product terminal acquire a first scheduling delay and a second scheduling delay from network equipment configuration, the first scheduling delay is a scheduling delay indicated by downlink control information DCI, and the second scheduling delay comprises a scheduling delay associated with cross-carrier scheduling indicated by the DCI; the terminal determines a third scheduling time delay according to the first scheduling time delay and the second scheduling time delay, wherein the third scheduling time delay is used for indicating the starting position of the terminal for data transmission; the terminal transmits data from the starting position. The problem that the scheduling time delay is too large or too small due to the fact that different cells have larger propagation time delay difference in the cross-carrier scheduling process in the NTN scene can be effectively solved, and the reliability of data transmission can be guaranteed.

Description

Data transmission method and related product

Technical Field

The application belongs to the technical field of communication, and particularly relates to a data transmission method and related products.

Background

Since the propagation delay in a non-terrestrial network (non-terrestrial network, NTN) communication system is much greater than that of a terrestrial network communication system. Therefore, when carrier aggregation is performed on cells corresponding to different satellites, there is a problem that the arrival times of downlink data of different cells are not aligned. Thus, in NTN scenarios, how to determine the scheduling delay in the cross-carrier scheduling process is a problem to be solved.

Disclosure of Invention

The embodiment of the application provides a data transmission method and related products, which are used for determining the scheduling delay of network equipment and a terminal in a cross-carrier scheduling process in an NTN scene and ensuring the reliability of data transmission.

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

the method comprises the steps that a terminal obtains a first scheduling time delay and a second scheduling time delay from network equipment configuration, wherein the first scheduling time delay is a scheduling time delay indicated by downlink control information DCI, and the second scheduling time delay comprises a scheduling time delay associated with cross-carrier scheduling indicated by the DCI;

the terminal determines a third scheduling time delay according to the first scheduling time delay and the second scheduling time delay, wherein the third scheduling time delay is used for indicating the starting position of the terminal for data transmission;

the terminal transmits data from the starting position.

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

the network equipment sends a first scheduling delay and a second scheduling delay to a terminal, wherein the first scheduling delay is a scheduling delay indicated by DCI, the second scheduling delay comprises a scheduling delay associated with cross-carrier scheduling indicated by the DCI, the first scheduling delay and the second scheduling delay are used for determining a third scheduling delay, and the third scheduling delay is used for indicating a starting position of the terminal for data transmission.

In a third aspect, an embodiment of the present application provides a data transmission apparatus, including: the processing unit is used for acquiring a first scheduling time delay and a second scheduling time delay from network equipment configuration by the terminal, wherein the first scheduling time delay is a scheduling time delay indicated by downlink control information DCI, the second scheduling time delay comprises a scheduling time delay associated with cross-carrier scheduling indicated by the DCI, the terminal is used for determining a third scheduling time delay according to the first scheduling time delay and the second scheduling time delay, and the third scheduling time delay is used for indicating a starting position of the terminal for data transmission; and the transmission unit is used for transmitting data from the starting position by the terminal.

In a fourth aspect, an embodiment of the present application provides a data transmission apparatus, including: the network equipment comprises a sending unit, a receiving unit and a scheduling unit, wherein the sending unit is used for sending a first scheduling delay and a second scheduling delay to a terminal, the first scheduling delay is a scheduling delay indicated by DCI, the second scheduling delay comprises a scheduling delay associated with cross-carrier scheduling indicated by the DCI, the first scheduling delay and the second scheduling delay are used for determining a third scheduling delay, and the third scheduling delay is used for indicating a starting position of the terminal for data transmission.

In a fifth aspect, embodiments of the present application provide a terminal comprising a processor, a memory, a communication interface, and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the processor, the programs comprising instructions for performing the steps in the first aspect of the embodiments of the present application.

In a sixth aspect, embodiments of the present application provide a network device comprising a processor, a memory, a communication interface, and one or more programs, wherein the one or more programs are stored in the memory and configured for execution by the processor, the programs comprising steps for performing the second aspect of embodiments of the present application.

In a seventh aspect, embodiments of the present application provide a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program for electronic data exchange, wherein the computer program causes a computer to perform part or all of the steps as described in the first aspect or the second aspect of the embodiments of the present application.

In an eighth aspect, embodiments of the present application provide a computer program product comprising a computer program or instructions which, when executed by a processor, performs part or all of the steps as described in any of the methods of the first or second aspects of embodiments of the present application.

In a ninth aspect, embodiments of the present application provide a chip, including: a processor for calling and running a computer program from a memory, causing a device on which the chip is mounted to perform some or all of the steps as described in any of the methods of the first or second aspects of the embodiments of the present application.

In a tenth aspect, embodiments of the present application provide a chip module including a chip as described in the ninth aspect of the embodiments of the present application.

In this example, when the cross-carrier scheduling is performed, the first scheduling delay and the second scheduling delay are considered to determine the final starting position of the data transmission, so that the problem that the scheduling delay is too large or too small due to the fact that different cells have larger propagation delay differences in the cross-carrier scheduling process in the NTN scene can be effectively solved, and the reliability of the data transmission can be ensured.

Drawings

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

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

fig. 1b is a schematic structural diagram of a terminal according to an embodiment of the present application;

Fig. 1c is a schematic structural diagram of a network device according to an embodiment of the present application;

fig. 2a is a schematic diagram of differential delay in coverage of a beam according to an embodiment of the present application;

fig. 2b is a schematic structural diagram of a satellite according to an embodiment of the present application when carrier aggregation is performed;

fig. 2c is a schematic structural diagram of another satellite according to an embodiment of the present application when carrier aggregation is performed, and fig. 2d is a schematic propagation delay diagram according to an embodiment of the present application;

fig. 3a is a schematic flow chart of a data transmission method according to an embodiment of the present application;

fig. 3b is a schematic diagram of a data transmission position according to an embodiment of the present application;

FIG. 3c is a schematic diagram of another data transmission position according to an embodiment of the present application;

FIG. 3d is a schematic diagram of another data transmission position according to an embodiment of the present application;

FIG. 3e is a schematic diagram of another data transmission position according to an embodiment of the present application;

FIG. 3f is a schematic diagram of another data transmission position according to an embodiment of the present application;

fig. 4 is a functional unit block diagram of a data transmission device according to an embodiment of the present application;

fig. 5 is a functional unit block diagram of another data transmission device according to an embodiment of the present application;

Fig. 6 is a functional unit block diagram of a data transmission device according to an embodiment of the present application;

fig. 7 is a block diagram of functional units of a data transmission device according to an embodiment of the present application.

Detailed Description

In order to make the present application better understood by those skilled in the art, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

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

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

In order to better understand the technical solutions of the embodiments of the present application, the technical solutions of the embodiments of the present application will be described below with reference to the accompanying drawings.

As shown in fig. 1a, fig. 1a is a system architecture diagram of an NTN communication system according to an embodiment of the present application. The NTN communication system 10 includes a terminal 110, a satellite 130, a gateway (gateway) 140, and a network device 150. The signals transmitted by the satellites 130 typically produce one or more beams (beams) 120 over a given service area (given service area) bounded by its field of view. In communication with the terminal, the terminal 110 may communicate directly with the satellite 130, i.e., the base station is located on the satellite 130, and the satellite 130 may be considered a base station. The terminal may also communicate with the gateway 140 or the network device 150, where the satellite 130 plays a role of relay in the system, and the gateway 140 and the network device 150 may be different devices or may be integrated in the same device. The wireless communication link between the terminal 110 and the satellite 130 is called a service link (service link), and the wireless communication link between the satellite 130 and the gateway 140 is called a feeder link (feeder link).

The terminal 20 in the embodiments of the present application may refer to a user equipment, 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 may also be a cellular telephone, a cordless telephone, a session initiation protocol (session initiation protocol, SIP) phone, a wireless local loop (wireless local loop, WLL) station, a personal digital assistant (personal digital assistant, PDA), a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, a relay device, an in-vehicle device, a wearable device, a terminal in a future 5G network or a terminal in a future evolved public land mobile network (public land mobile network, PLMN), etc., as the embodiments of the application are not limited in this respect. As shown in fig. 1b, the terminal in the terminal according to the embodiment of the present application may include one or more of the following components: processor 210, memory 220, and communication interface 230, processor 210 being communicatively coupled to memory 220, communication interface 230, respectively, memory 220 further comprising one or more programs 221.

The network device 30 in this embodiment of the present application may be an evolved NodeB (eNB or eNodeB) in an LTE system, or may be a radio controller in a cloud radio access network (cloud radio access network, CRAN) scenario, or a network element, or the network device may be a relay device, an access point, an on-vehicle device, a wearable device, and a network device in a future 5G network or a network device in a future evolved PLMN network, one or a group of base stations (including multiple antenna panels) in the 5G system may be antenna panels, or may also be a network node forming a base station (gNB) or a transmission point in a New Radio (NR) communication system, such as a baseband unit (BBU), or a Distributed Unit (DU), or the like. As shown in fig. 1c, the source network device or the target network device in the embodiments of the present application may include one or more of the following components: processor 310, memory 320, and communication interface 330, processor 310 being communicatively coupled to memory 320, communication interface 330, respectively, memory 320 further comprising one or more programs 321.

In some deployments, the gNB may include a Centralized Unit (CU) and DUs. The gNB may also include an active antenna unit (active antenna unit, AAU). The CU implements part of the functionality of the gNB and the DU implements part of the functionality of the gNB. For example, the CU is responsible for handling non-real time protocols and services, implementing the functions of the radio resource control (radio resource control, RRC), packet data convergence layer protocol (packet data convergence protocol, PDCP) layer. The DUs are responsible for handling physical layer protocols and real-time services, implementing the functions of the radio link control (radio link control, RLC), medium access control (medium access control, MAC) and Physical (PHY) layers. The AAU realizes part of physical layer processing function, radio frequency processing and related functions of the active antenna. Since the information of the RRC layer may eventually become information of the PHY layer or be converted from the information of the PHY layer, under this architecture, higher layer signaling, such as RRC layer signaling, may also be considered to be transmitted by the DU or by the du+aau. It is understood that the network device may be a device comprising one or more of a CU node, a DU node, an AAU node. In addition, the CU may be divided into network devices in an access network (radio access network, RAN), or may be divided into network devices in a Core Network (CN), which is not limited in this application.

In the embodiment of the present application, the terminal 20 or the network device 30 includes a hardware layer, an operating system layer running above the hardware layer, and an application layer running above the operating system layer. The hardware layer includes hardware such as a central processing unit (central processing unit, CPU), a memory management unit (memory management unit, MMU), and a memory (also referred to as a main memory). The operating system may be any one or more computer operating systems that implement business processes through processes (processes), such as a Linux operating system, a Unix operating system, an Android operating system, an iOS operating system, or a windows operating system. The application layer comprises applications such as a browser, an address book, word processing software, instant messaging software and the like. The embodiment of the present application is not particularly limited to the specific structure of the execution body of the method provided in the embodiment of the present application, as long as the communication can be performed by the method provided in the embodiment of the present application by executing the program recorded with the code of the method provided in the embodiment of the present application, and for example, the execution body of the method provided in the embodiment of the present application may be a terminal, or a functional module in the terminal that can call the program and execute the program.

The definitions or explanations of the concepts and terms referred to in this application are as follows.

Cross-carrier scheduling: LTE-a (Long Term Evolution Advanced ) R10 (Release 10, release 10) introduced a CA (Carrier Aggregation ) feature, allowing one UE (User's Equipment) to aggregate multiple carriers simultaneously, which jointly serve the UE and support cross-carrier scheduling of uplink/downlink shared channels. The introduction of cross-carrier scheduling mainly aims to solve the problem that in an actual system, the PDCCH (Physical Downlink Control Channel ) of a certain CC (Component Carrier, member carrier) has high allocation failure rate or poor quality of the PDCCH channel, so that the scheduling signaling of the CC cannot be successfully transmitted, thereby influencing the system performance.

With carrier aggregation, the base station is required to send scheduling signaling indicating the individual carriers. The current protocol supports two scheduling modes of independent scheduling and cross-carrier scheduling of each carrier. Wherein, the former is the same as LTE R8/9 system, physical downlink control channel (Physical Downlink Control Channel, PDCCH) on each carrier indicates own PDSCH (Physical Downlink Shared Channel ) and PUSCH (Physical Uplink Shared Channel, physical uplink shared channel) scheduling signaling; the latter allows the scheduling signaling of the SCC (Secondary Component Carrier, secondary carrier) to be carried over the PDCCH channel of the PCC (Primary Component Carrier, primary carrier). By configuring cross-carrier scheduling, scheduling signaling of a plurality of different CCs for the same UE may need to be transmitted on a single CC at the same time in the same subframe, so that probability of successful transmission of the scheduling signaling can be improved, and PDCCH resources on the carrier are fully utilized.

NTN communication system: in NTN scenarios, a cell is composed of one or more beams, and since the satellite is far from the ground and the coverage area of the beam or cell formed by the satellite is relatively large, a large differential delay exists in the coverage area of the beam or cell. The maximum differential delay within a cell or beam coverage area refers to: in a cell or beam coverage, the difference between the propagation delay value corresponding to the position furthest from the satellite and the propagation delay value corresponding to the position closest to the satellite. As shown in fig. 2a, assuming D1 is the closest distance of the satellite to the beam coverage, D2 is the furthest distance of the satellite to the beam coverage, since propagation delay can be calculated from the transmission channel length and the propagation rate of the signal in the transmission medium, and in NTN scenarios the operation of the satellite is based on a specific orbit, its motion is regular, and thus the propagation delay variation due to the satellite motion is regular and predictable. Thus, the maximum differential delay corresponding to a cell or beam coverage area can be calculated. For example, the 2 times the value of the maximum differential delay of the geostationary satellite is 20.6ms.

At present, the distances between different satellites (including different satellites in the same orbit and different satellites in different orbits) and the terminal are greatly different, so that a large time delay difference exists when the terminal receives data issued by different satellites. For example, when CA is performed between satellites in different orbits, since the altitude difference between the different orbits can reach hundreds or even tens of thousands of kilometers, the delay difference between different cells in this scenario can reach tens or even hundreds of milliseconds. In the case of CA for satellites in the same orbit, as shown in fig. 2b, in the case of CA for cells corresponding to 3 satellites in the same orbit, there is a delay difference of several ms to several tens of ms between different cells. When the CA is performed on different base stations of the same satellite, as shown in fig. 2c, since the maximum differential delay value of the cell or the beam can reach 10ms, a larger delay difference exists in the feeder link, so that in this case, a larger delay difference exists between different cells, for example, the delay difference is between 3ms and 10 ms.

Therefore, in the NTN scenario, when carrier aggregation is performed on cells or carriers, there is a problem that downlink data arrival times of different cells (primary cell/secondary cell) are not aligned from the terminal side. As shown in fig. 2d, the network device configures 3 server cells for the terminal, including a primary cell Pcell and two secondary cells, scell1 and Scell2, respectively, and it is assumed that the base station side synchronously transmits data of different cells, and it can be seen that the downlink time synchronization is not aligned due to a large propagation delay difference of different serving cells. And the degree of misalignment can be as much as tens of ms, or even hundreds of ms. However, since the base station side does not know the delay difference of different carriers or cells, how to determine the scheduling delay of cross-carrier scheduling by the base station and the terminal is a problem to be solved in the NTN scenario.

In view of the foregoing, embodiments of the present application provide a data transmission method and related products, and the following detailed description is given with reference to the accompanying drawings.

Referring to fig. 3a, fig. 3a is a flow chart of a data transmission method according to an embodiment of the present application. As shown, the method comprises the steps of:

step 301, a terminal acquires a first scheduling delay and a second scheduling delay from network equipment configuration;

step 302, the terminal determines a third scheduling time delay according to the first scheduling time delay and the second scheduling time delay, where the third scheduling time delay is used to indicate a starting position of the terminal for data transmission;

and 303, the terminal transmits data from the starting position.

The first scheduling delay is a scheduling delay indicated by downlink control information DCI, and the second scheduling delay includes a scheduling delay associated with cross-carrier scheduling indicated by the DCI. For uplink data scheduling, the first scheduling delay value indicated in the DCI is K2, the time slot Ks of the UE transmitting PUSCH is determined by K2, and the calculation mode of Ks is as follows:

for downlink data scheduling, the first scheduling delay value indicated in the DCI is K0, the time slot allocated for the PDSCH is Ks, and the manner of calculating Ks is:

Where n is the time slot or subframe number where the DCI is received.

Therefore, in the scheme, when determining the starting position of the terminal for data transmission, the first scheduling delay K0 or K2 indicated in the DCI and the second scheduling delay for the network device for cross-carrier scheduling configuration of the terminal are considered at the same time.

In one possible example, before the acquiring the first scheduling delay and the second scheduling delay from the network device configuration, the method further includes: the method comprises the steps of obtaining a first propagation delay of a first service cell and a second propagation delay of a second service cell, wherein the first propagation delay is used for indicating the propagation delay between the terminal and network equipment corresponding to the first service cell, and the second propagation delay is used for indicating the propagation delay between the terminal and the network equipment corresponding to the second service cell.

In a specific implementation, when the serving cell configured by the network device for the terminal includes multiple serving cells (including the primary cell and the secondary cell), the terminal may obtain propagation delay of each serving cell in the multiple serving cells, so as to obtain multiple propagation delay values. Each propagation delay value is used for indicating the propagation delay between the network equipment and the terminal corresponding to the corresponding service cell. The terminal may first calculate the round-trip propagation delay between the terminal and the satellite according to the ephemeris information of the satellite corresponding to each serving cell and the position information of the terminal itself, where the propagation delay may also be referred to as the timing advance of the terminal level. And then the terminal determines the size of the public TA according to public TA parameters indicated by the network equipment, wherein the public TA is Round trip propagation Time (RTT) between a reference point and a satellite, and the reference point can be the satellite, a ground base station, a service link or any position of a feedback link. The terminal then receives a validation delay value k_mac of a media access layer control signaling (MAC CE) indicated by the network device. Thus, the propagation delay of each serving cell is one half of the sum of the round-trip propagation delay between the terminal to the satellite, the size of the common TA, and the effective delay value k_mac.

In one possible example, the first serving cell and the second serving cell are any two different serving cells in at least two serving cells configured by the network device for the terminal, the terminal performs cross-carrier data transmission between the first serving cell and the second serving cell, the terminal receives the scheduling DCI based on the first serving cell, and receives the data scheduled by the scheduling DCI based on the second serving cell.

In the CA scenario, the different cells may perform data scheduling, that is, the terminal receives the scheduling DCI and the data scheduled by the scheduling DCI is in different carriers or cells, the carrier or cell that receives the scheduling DCI is called a scheduling carrier or scheduling cell, and the carrier or cell that receives the data scheduled by the scheduling DCI is called a scheduled carrier or a scheduled cell. The first serving cell is therefore a scheduling cell and the second serving cell is a scheduled cell.

In one possible example, the obtaining the first scheduling delay and the second scheduling delay from the network device configuration includes: acquiring a propagation delay difference corresponding to the first service cell and the second service cell according to the first propagation delay and the second propagation delay; transmitting the propagation delay difference to the network device; and acquiring the second scheduling time delay from the network equipment configuration, wherein the second scheduling time delay is determined by the network equipment according to the propagation time delay difference.

The terminal acquires propagation time delay of the first service cell and the second service cell, obtains propagation time delay difference values corresponding to the first service cell and the second service cell according to the first propagation time delay and the second propagation time delay, reports the propagation time delay difference values to the network equipment, and the network equipment can determine additional scheduling time delay values when the first service cell and the second service cell transmit cross-carrier data according to the propagation time delay difference values. The second scheduling delay includes the additional scheduling delay value. It should be noted that, the additional scheduling delay value configured by the network device for uplink data scheduling and downlink data scheduling may be different, that is, the additional scheduling delay value configured by the network device for downlink data transmission may be: the downlink scheduling delay value is T1, and the network equipment configures additional scheduling delay value for uplink data transmission: the uplink scheduling time delay value is T2. And the network device may be determined according to the processing capability of the terminal when configuring T1 or T2.

In a specific implementation, when the terminal sends the propagation delay difference corresponding to the first serving cell and the second serving cell, the terminal can send the propagation delay difference corresponding to any two other serving cells to the network device at the same time. The terminal can firstly acquire the propagation delay of all the service cells configured by the network equipment for the terminal, so that the terminal can firstly perform any two-by-two combination on all the service cells to obtain a plurality of cell groups when determining the second scheduling delay, then obtain the propagation delay difference of each cell group according to the propagation delay of all the service cells acquired in advance, report the propagation delay differences of all the service cells to the network equipment when reporting the propagation delay differences, and then determine the additional scheduling delay corresponding to each cell group and related to the cross-carrier scheduling by the network equipment. After the network device configures the additional scheduling delay value associated with the cross-carrier scheduling of each cell group to the terminal, the terminal can acquire the additional scheduling delay associated with the cross-carrier scheduling corresponding to each cell group. When the cross-carrier data transmission is carried out, the terminal firstly determines two service cells for carrying out the cross-carrier data transmission according to the content indicated in the DCI, then determines a cell group corresponding to the two service cells, and then determines a second scheduling time delay according to the additional scheduling time delay corresponding to the cell group and associated with the cross-carrier scheduling. It should be noted that, all the serving cells described in this solution are serving cells configured by the network device for the terminal, including a primary cell and a secondary cell.

In one possible example, the obtaining the first scheduling delay and the second scheduling delay from the network device configuration includes: transmitting the first propagation delay and the second propagation delay to the network device; and acquiring the second scheduling time delay from the network equipment configuration, wherein the second scheduling time delay is determined by the network equipment according to the first propagation time delay and the second propagation time delay.

After the terminal obtains the scheduling delays of the first serving cell and the second serving cell, the first scheduling delay and the second scheduling delay can be directly sent to the network device, the network device determines scheduling delay differences corresponding to the first serving cell and the second serving cell according to the first scheduling delay and the second scheduling delay, and finally determines additional scheduling delays when the first serving cell and the second serving cell perform cross-carrier data scheduling according to the scheduling delay differences.

In a specific implementation, when the terminal sends the first propagation delay and the second propagation delay, the terminal can also send the propagation delays of other service cells at the same time, that is, the terminal can send the propagation delays of all the service cells to the network device at the same time, the network device determines additional scheduling delays associated with cross-carrier scheduling corresponding to each cell group according to the propagation delays of all the service cells, and then the network device sends the additional scheduling delays associated with cross-carrier scheduling corresponding to each cell group to the terminal.

In one possible example, the value of the propagation delay difference is an absolute value of a difference between the value of the first propagation delay and the value of the second propagation delay.

And when determining the additional scheduling time delay associated with the cross-carrier scheduling corresponding to each service cell group, acquiring the absolute value of the difference of the values of the propagation delays of the two service cells included in each cell group by the terminal to obtain the propagation delay difference value of each cell group. Or the terminal transmits the propagation delays of all the service cells to the network equipment, the network equipment performs difference operation on any two propagation delays to obtain a plurality of propagation delay differences, and then determines that the corresponding service cell is a cell group according to the propagation delay differences. Or the network equipment firstly performs any two-by-two combination on all the service cells according to the obtained propagation delay to obtain a plurality of cell groups, and then performs difference operation on the corresponding propagation delay in each cell group. For example, the network device configures 3 service cells for the terminal, namely, cell a, cell B and cell C, and the terminal obtains propagation delays of cell a, cell B and cell C respectively to obtain propagation delay 1, propagation delay 2 and propagation delay 3. Then, the terminal can obtain a plurality of cell groups to obtain a cell group a, a cell group B and a cell group C, wherein the cell group a comprises a cell A and a cell B, the cell group B comprises a cell B and a cell C, and the cell group C comprises a cell A and a cell C, so that the absolute value of the difference between the value of the propagation delay 1 and the value of the propagation delay 2 corresponding to the cell group a can be determined, and the propagation delay difference value calculation modes corresponding to other cell groups are similar.

In one possible example, the terminal sends the propagation delay difference corresponding to the first serving cell and the second serving cell to the network device through higher layer signaling. Or the terminal sends the first propagation delay and the second propagation delay to the network equipment through higher layer signaling.

Wherein the higher layer signaling includes a radio resource control (Radio Resource Control, RRC) message or a medium access layer control signaling (MAC CE). The terminal can also send the propagation delay difference corresponding to the cell group through the high-layer signaling at the same time, or send the propagation delay of other service cells through the high-layer signaling at the same time.

Therefore, the second scheduling time delay is determined according to the propagation time delays of the two service cells performing cross-carrier scheduling, so that in a cross-carrier scheduling scene, when the terminal performs data transmission according to the first scheduling time delay and the second scheduling time delay, the reliability of the data transmission can be ensured, and the problems of overlarge actual scheduling time delay and the like can not be caused.

In one possible example, the second scheduling delay includes a downlink scheduling delay configured by the network device associated with the terminal performing downlink cross-carrier data transmission between the first serving cell and the second serving cell.

After determining two serving cells for cross-carrier data scheduling according to the content indicated by the DCI, the terminal may determine second scheduling delays corresponding to the two serving cells from a plurality of additional scheduling delay values configured by the network device, that is, the second scheduling delays include downlink scheduling delays T1 when downlink data transmission is performed, and the second scheduling delays include uplink scheduling delays T2 when uplink data transmission is performed.

In one possible example, the value of the third scheduling delay is determined to be the sum of the value of the first scheduling delay and the value of the second scheduling delay, in case the value of the first propagation delay is larger than the value of the second propagation delay.

For downlink cross-carrier data transmission, when the propagation delay value of the scheduling cell or carrier is greater than the propagation delay value of the scheduled cell or carrier, the third scheduling delay value of the terminal is: k0+t1, i.e. the terminal starts data transmission at the time slot or sub-frame of k0+t1. It should be noted that the units of K0 and T1 are slots or subframes. The time slot Ks allocated for PDSCH at this time is calculated as:

where n is the time slot or subframe number where the DCI is received.

For example, as shown in fig. 3B, for downlink cross-carrier data transmission, since the propagation delay difference between two serving cells is large, the first serving cell Scell1 receives DCI at the time slot a, the second serving cell Scell2 receives DCI at the time slot B, if the data transmission starting position of the second serving cell is determined only according to the first scheduling delay K0, the data transmission starting position may still be located before the time slot a, so that the terminal does not have enough time to process the data, and therefore in this case, the starting position of the data transmission of the second serving cell is determined to be k0+t1, so that the starting position of the data transmission of the second serving cell is located after the time slot a, and the terminal has enough time to process the data. Therefore, the reliability of downlink data transmission is ensured, and the actual scheduling delay is not excessively large. Of course, for uplink cross-carrier data transmission, the starting position of the data transmission of the second serving cell may be: k2+t2. The time slot Ks allocated for PUSCH at this time is calculated as:

where n is the time slot or subframe number where the DCI is received.

In this example, it can be seen that determining the third scheduling delay as the sum of the first scheduling delay and the second scheduling delay can ensure the reliability of data transmission, and does not make the actual scheduling delay too large.

In one possible example, the value of the third scheduling delay is determined as a difference between the value of the first scheduling delay and the value of the second scheduling delay, in case the value of the first propagation delay is smaller than the value of the second propagation delay.

For downlink cross-carrier data transmission, when the propagation delay value of the scheduling cell or carrier is smaller than the propagation delay value of the scheduled cell or carrier, the third scheduling delay value of the terminal is: k0-T1, i.e. the terminal starts data transmission at the time slot or sub-frame of k 0-T1. It should be noted that the units of K0 and T1 are slots or subframes. The time slot Ks allocated for PDSCH at this time is calculated as:

where n is the time slot or subframe number where the DCI is received.

For example, as shown in fig. 3c, for downlink cross-carrier data transmission, since the propagation delay difference between two serving cells is large, the first serving cell Scell2 receives DCI at the time slot a, the second serving cell Scell1 receives DCI at the time slot B, if the data transmission starting position of the second serving cell is determined according to the first scheduling delay K0, the actual scheduling delay is too large, and therefore the starting position of data transmission of the second serving cell is determined to be K0-T1, which not only can ensure that a terminal has enough time to process data, but also can solve the problem of actual scheduling delay large caused by the large propagation delay of the scheduled cell, and reduce the scheduling delay. Of course, for uplink cross-carrier data transmission, the starting position of the data transmission of the second serving cell may be: k2-T2. The time slot Ks allocated for PUSCH at this time is calculated as:

Where n is the time slot or subframe number where the DCI is received.

In this example, the third scheduling delay is determined to be the absolute value of the difference between the first scheduling delay and the second scheduling delay, so that the reliability of data transmission can be ensured, and the scheduling delay is reduced.

In one possible example, the determining a third scheduling delay according to the first scheduling delay and the second scheduling delay includes: and determining that the value of the third scheduling delay is the sum of the value of the first scheduling delay and the value of the second scheduling delay.

And the terminal performs uplink cross-carrier data scheduling between the first service cell and the second service cell.

In one possible example, the second scheduling delay includes an uplink scheduling delay configured by the network device and a fourth scheduling delay, the uplink scheduling delay being a scheduling delay associated with the terminal performing uplink cross-carrier data transmission between the first serving cell and the second serving cell, the fourth scheduling delay being an additional scheduling delay k_offset associated with the first serving cell or the second serving cell in non-terrestrial network communication.

The value of the uplink scheduling delay is T2 determined in the foregoing embodiment. In NTN scenario, the UE may send in advance based on the TA (timing advance) value obtained when sending the uplink data, and for this reason, it is necessary to enhance the uplink and downlink timing in the existing protocol, i.e. add an additional time interval (k_offset). Therefore, a fourth scheduling delay needs to be configured for both the first serving cell and the second serving cell, and since the network device can determine a corresponding additional scheduling delay for each UE in each serving cell, each UE will be configured with a fourth scheduling delay in each serving cell. In a specific implementation, the network may configure a k_offset value for cross-carrier scheduling for each cell in each cell group through RRC signaling or MAC CE.

Because of the large propagation delay in NTN, if the UE needs to transmit in advance according to the acquired TA value, it means that there must be a sufficiently large time interval between the PDCCH receiving time and the PUSCH transmission resource location to ensure the UE to transmit in advance. And the time interval cannot be at least smaller than the size of the TA, the size of the UE compensating for the TA may be the round-trip propagation delay between the satellite and the UE. Therefore, when the terminal performs uplink cross-carrier data transmission, the fourth scheduling delay also needs to be considered.

In one possible example, in a case where the value of the first propagation delay is greater than the value of the second propagation delay, the value of the second scheduling delay is a sum of the value of the uplink scheduling delay and the value of the fourth scheduling delay.

For uplink cross-carrier data transmission, when the propagation delay value of the scheduling cell or carrier is greater than the propagation delay value of the scheduled cell or carrier, the third scheduling delay value of the terminal is: k2+k_offset+t2, i.e. the terminal starts data transmission at the time slot or sub-frame of k2+k_offset+t2. It should be noted that, the units of K2 and T2 are slots or subframes, and the k_offset may be a k_offset value corresponding to the first serving cell or a k_offset value corresponding to the second serving cell. The time slot Ks allocated for PUSCH at this time is calculated as:

where n is the time slot or subframe number where the DCI is received.

For example, as shown in fig. 3d, since the propagation delay difference between two serving cells is large, the first serving cell Scell1 receives DCI at the time slot a, the second serving cell Scell2 receives DCI at the time slot B, and if the data transmission start position of the second serving cell is determined according to the first scheduling delay K2 only or according to the first scheduling delay K2 and the fourth scheduling delay k_offset only, the data transmission start position may still be located before the time slot a, so that the terminal does not have enough time to process the data, and in this case, the start position of the data transmission of the second serving cell is determined to be k2+kjoffset+t2, so that the start position of the data transmission of the second serving cell is located after the time slot a, so that the terminal has enough time to perform timing advance and data processing. Therefore, the reliability of uplink data transmission is ensured, and the actual scheduling delay is not excessively large.

In this example, when uplink cross-carrier data transmission is performed, the second scheduling delay is determined to be the sum of the first uplink scheduling delay and the fourth scheduling delay, so that the reliability of data transmission can be ensured, and the actual scheduling delay cannot be excessively large.

In one possible example, in a case where the value of the first propagation delay is smaller than the value of the second propagation delay, the value of the second scheduling delay is a difference between the value of the uplink scheduling delay and the value of the fourth scheduling delay.

For uplink cross-carrier data transmission, when the propagation delay value of the scheduling cell or carrier is smaller than the propagation delay value of the scheduled cell or carrier, the third scheduling delay value of the terminal is: k2+k_offset-T2, i.e. the terminal starts data transmission at the time slot or sub-frame of k2+k_offset-T2. It should be noted that, the units of K2 and T2 are slots or subframes, and the k_offset may be a k_offset value corresponding to the first serving cell or a k_offset value corresponding to the second serving cell. The time slot Ks allocated for PUSCH at this time is calculated as:

where n is the time slot or subframe number where the DCI is received.

For example, as shown in fig. 3e, since the propagation delay difference between two serving cells is large, the first serving cell Scell2 receives DCI at the time slot a, the second serving cell Scell1 receives DCI at the time slot B, if the starting position of data transmission of the second serving cell is determined according to the first scheduling delay K2 or according to the first scheduling delay K2 and the fourth scheduling delay k_offset, the actual scheduling delay is too large, so that the starting position of data transmission of the second serving cell is determined to be k2+k_offset-T2, which not only can make the terminal have enough time to execute timing advance and data processing, but also can solve the problem of the actual scheduling delay caused by the large propagation delay of the scheduled cell, and reduce the scheduling delay.

In this example, when uplink cross-carrier data transmission is performed, the second scheduling delay is determined to be the difference between the first uplink scheduling delay and the fourth scheduling delay, so that the reliability of data transmission can be ensured, and the scheduling delay is reduced.

In one possible example, the second scheduling delay includes a scheduling delay associated with the first serving cell or the second serving cell when the terminal performs uplink cross-carrier data transmission between the first serving cell and the second serving cell in non-terrestrial network communication.

For uplink cross-carrier data transmission, when the network determines to perform cross-carrier uplink transmission (one is a scheduling cell and the other is a scheduled cell) in each cell group according to propagation delay differences corresponding to each cell group reported by the UE, the network may configure a second scheduling delay value for cross-carrier scheduling for each cell in each cell group through RRC signaling or MAC CE. When the network performs cross-carrier data scheduling in a certain cell group, the UE determines scheduling delay according to a second scheduling delay value for cross-carrier scheduling corresponding to a scheduled carrier in the cell group, wherein the second scheduling delay values corresponding to different serving cells can be different. It should be noted that, at this time, when uplink cross-carrier data transmission is performed, it may still be ensured that the terminal has enough time to perform timing advance and data processing, so that the network device does not need to configure a fourth scheduling delay k_offset.

For example, as shown in fig. 3f, assuming that the second scheduling delay configured by the network device for the second serving cell is M, since the propagation delay difference between the two serving cells is large, the first serving cell Scell1 receives DCI at the time slot a, the second serving cell Scell2 receives DCI at the time slot B, if the data transmission starting position of the second serving cell is determined only according to the first scheduling delay K2, the data transmission starting position may still be located before the time slot a, and thus the data cannot be normally transmitted, in this case, the starting position of the data transmission of the second serving cell is determined to be k2+m, so that the starting position of the data transmission of the second serving cell is located after the time slot a, and the terminal has enough time to perform timing advance and data processing. Therefore, the reliability of uplink data transmission is ensured, and the actual scheduling delay is not excessively large. The time slot Ks allocated for PUSCH at this time is calculated as:

where n is the time slot or subframe number where the DCI is received.

The embodiment of the application provides a data transmission device, which is used for executing steps executed by a terminal in the data transmission method, and the data transmission device provided by the embodiment of the application can comprise units corresponding to the corresponding steps.

The embodiment of the present application may divide the functional units of the data transmission apparatus according to the above method example, for example, each functional unit may be divided corresponding to each function, or two or more functions may be integrated in one processing unit. The integrated units may be implemented in hardware or in software functional units. The division of the units in the embodiment of the application is schematic, which is merely a logic function division, and other division manners may be adopted in actual implementation.

In the case of dividing the respective functional units with the respective functions, fig. 4 shows a possible structural diagram of the data transmission device involved in the above-described embodiment, and the data transmission device 40 includes: a processing unit 401, configured to obtain, by a terminal, a first scheduling delay and a second scheduling delay from network equipment configuration, where the first scheduling delay is a scheduling delay indicated by downlink control information DCI, the second scheduling delay includes a scheduling delay associated with cross-carrier scheduling indicated by the DCI, and the processing unit is configured to determine, by the terminal, a third scheduling delay according to the first scheduling delay and the second scheduling delay, where the third scheduling delay is used to indicate a start position of data transmission by the terminal; a transmission unit 402, configured to transmit data from the start position by the terminal.

In one possible example, before the acquiring the first scheduling delay and the second scheduling delay from the network device configuration, the apparatus 40 is further configured to: acquiring a first propagation delay of a first service cell and a second propagation delay of a second service cell, wherein the first service cell and the second service cell are any two different service cells in at least two service cells configured by the network equipment for the terminal, the terminal executes cross-carrier data transmission between the first service cell and the second service cell, the terminal receives scheduling DCI based on the first service cell, receives data scheduled by the scheduling DCI based on the second service cell, the first propagation delay is used for indicating the propagation delay between the terminal and the network equipment corresponding to the first service cell, and the second propagation delay is used for indicating the propagation delay between the terminal and the network equipment corresponding to the second service cell.

In one possible example, in terms of the obtaining the first scheduling delay and the second scheduling delay from the network device configuration, the processing unit 401 is specifically configured to: acquiring a propagation delay difference corresponding to the first service cell and the second service cell according to the first propagation delay and the second propagation delay; transmitting the propagation delay difference to the network device; and acquiring the second scheduling time delay from the network equipment configuration, wherein the second scheduling time delay is determined by the network equipment according to the propagation time delay difference.

In one possible example, in terms of the obtaining the first scheduling delay and the second scheduling delay from the network device configuration, the processing unit 401 is specifically configured to: transmitting the first propagation delay and the second propagation delay to the network device; and acquiring the second scheduling time delay from the network equipment configuration, wherein the second scheduling time delay is determined by the network equipment according to the first propagation time delay and the second propagation time delay.

In one possible example, in said determining a third scheduling delay according to said first scheduling delay and said second scheduling delay, said processing unit 401 is specifically configured to: and determining that the value of the third scheduling delay is the sum of the value of the first scheduling delay and the value of the second scheduling delay.

In the case of using an integrated module, a schematic structural diagram of the data transmission device provided in the embodiment of the present application is shown in fig. 5. In fig. 5, the data transmission device 5 includes a processing module 50 and a communication module 51. The processing module 50 is used for controlling and managing the actions of the data transmission device, such as the steps performed by the processing unit 401 and the transmission unit 402 shown in fig. 4 and/or other processes for performing the techniques described herein. The communication module 51 is used for interaction between the data transmission means and other devices. As shown in fig. 5, the data transmission device 5 may further include a storage module 52, where the storage module 52 is configured to store the program codes and data of the data transmission device 40, for example, the contents stored in the storage unit.

The processing module 50 may be a processor or controller, such as a central processing unit (Central Processing Unit, CPU), a general purpose processor, a digital signal processor (Digital Signal Processor, DSP), an ASIC, an FPGA or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. Which may implement or perform the various exemplary logic blocks, modules, and circuits described in connection with this disclosure. The processor may also be a combination that performs the function of a computation, e.g., a combination comprising one or more microprocessors, a combination of a DSP and a microprocessor, and the like. The communication module 51 may be a transceiver, an RF circuit, a communication interface, or the like. The memory module 52 may be a memory.

All relevant contents of each scenario related to the above method embodiment may be cited to the functional description of the corresponding functional module, which is not described herein. The data transmission device 40 may perform the steps performed by the terminal in the data transmission method shown in fig. 3 a.

The embodiment of the application provides a data transmission device, which is used for executing steps executed by network equipment in the data transmission method, and the data transmission device provided by the embodiment of the application can comprise units corresponding to the corresponding steps.

Fig. 6 shows a possible structural diagram of the data transmission device involved in the above-described embodiment in the case of dividing the respective functional units with the respective functions, and the data transmission device 60 includes: the sending unit 601 is configured to send, by a network device, a first scheduling delay and a second scheduling delay to a terminal, where the first scheduling delay is a scheduling delay indicated by DCI, the second scheduling delay includes a scheduling delay associated with cross-carrier scheduling indicated by the DCI, the first scheduling delay and the second scheduling delay are used to determine a third scheduling delay, and the third scheduling delay is used to indicate a starting position of data transmission by the terminal.

In one possible example, before the sending of the first scheduling delay and the second scheduling delay to the terminal, the apparatus 60 is further configured to: acquiring a propagation delay difference corresponding to a first service cell and a second service cell which are reported by the terminal, wherein the first service cell and the second service cell are any two different service cells in at least two service cells configured by the network equipment for the terminal, the network equipment performs cross-carrier scheduling between the first service cell and the second service cell, the network equipment sends scheduling DCI based on the first service cell, and sends data scheduled by the scheduling DCI based on the second service cell, the first propagation delay is used for indicating the propagation delay between the terminal and the network equipment corresponding to the first service cell, and the second propagation delay is used for indicating the propagation delay between the terminal and the network equipment corresponding to the second service cell; and determining the second scheduling delay according to the propagation delay difference.

In one possible example, before the sending of the first scheduling delay and the second scheduling delay to the terminal, the apparatus 60 is further configured to: acquiring a first propagation delay from a first service cell reported by the terminal and a second propagation delay from the second service cell; and determining the second scheduling delay according to the first propagation delay and the second propagation delay.

In one possible example, the first serving cell and the second serving cell are any two different serving cells in at least two serving cells configured by the network device for the terminal, and the network device performs cross-carrier scheduling between the first serving cell and the second serving cell, and sends scheduling DCI based on the first serving cell, and sends data scheduled by the scheduling DCI based on the second serving cell.

In one possible example, the second scheduling delay includes a scheduling delay associated with the network device performing downlink cross-carrier scheduling between the first serving cell and the second serving cell.

In one possible example, the second scheduling delay includes an uplink scheduling delay configured by the network device and a fourth scheduling delay, the uplink scheduling delay being a scheduling delay associated with the network device performing uplink cross-carrier scheduling between the first serving cell and the second serving cell, the fourth scheduling delay being an additional scheduling delay k_offset associated with the first serving cell or the second serving cell in non-terrestrial network communications.

In one possible example, the second scheduling delay includes a scheduling delay associated with the first serving cell or the second serving cell when the network device performs uplink cross-carrier scheduling between the first serving cell and the second serving cell in non-terrestrial network communication.

In the case of using an integrated module, a schematic structural diagram of the data transmission device provided in the embodiment of the present application is shown in fig. 7. In fig. 7, the data transmission device 7 includes a processing module 70 and a communication module 71. The processing module 70 is used for controlling and managing the actions of the data transmission device, such as the steps performed by the sending unit 601 shown in fig. 6 and/or other processes for performing the techniques described herein. The communication module 71 is used for interaction between the data transmission means and other devices. As shown in fig. 7, the data transmission device 7 may further include a storage module 72, where the storage module 72 is configured to store the program codes and data of the data transmission device 40, for example, the contents stored in the storage unit.

The processing module 70 may be a processor or controller, such as a central processing unit (Central Processing Unit, CPU), a general purpose processor, a digital signal processor (Digital Signal Processor, DSP), an ASIC, an FPGA or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. Which may implement or perform the various exemplary logic blocks, modules, and circuits described in connection with this disclosure. The processor may also be a combination that performs the function of a computation, e.g., a combination comprising one or more microprocessors, a combination of a DSP and a microprocessor, and the like. The communication module 71 may be a transceiver, an RF circuit, a communication interface, or the like. The memory module 72 may be a memory.

All relevant contents of each scenario related to the above method embodiment may be cited to the functional description of the corresponding functional module, which is not described herein. The data transmission device 60 may perform the steps performed by the network device in the data transmission method shown in fig. 3 a.

The embodiment of the application also provides a computer readable storage medium, wherein the computer readable storage medium stores a computer program for electronic data exchange, and the computer program makes a computer execute part or all of the steps described by the network side device in the embodiment of the method.

The embodiments of the present application also provide a computer program product, which includes a computer program or instructions that, when executed by a processor, implement some or all of the steps described in the network-side device or the terminal-side device in the above method embodiments.

The embodiment of the application provides a chip, wherein the chip is used for a terminal to acquire a first scheduling time delay and a second scheduling time delay from network equipment configuration, the first scheduling time delay is a scheduling time delay indicated by downlink control information DCI, the second scheduling time delay comprises a scheduling time delay associated with cross-carrier scheduling indicated by the DCI, the terminal is used for determining a third scheduling time delay according to the first scheduling time delay and the second scheduling time delay, and the third scheduling time delay is used for indicating a starting position of the terminal for data transmission; and for the terminal to transmit data from the starting location.

The embodiment of the application provides a chip module, which comprises a receiving and transmitting component and a chip, wherein the chip is used for a terminal to acquire a first scheduling time delay and a second scheduling time delay from network equipment configuration, the first scheduling time delay is a scheduling time delay indicated by downlink control information DCI, the second scheduling time delay comprises a scheduling time delay associated with cross-carrier scheduling indicated by the DCI, the terminal is used for determining a third scheduling time delay according to the first scheduling time delay and the second scheduling time delay, and the third scheduling time delay is used for indicating a starting position of the terminal for data transmission; and for the terminal to transmit data from the starting location.

The embodiment of the application provides a chip, the chip is used for a network device to send a first scheduling delay and a second scheduling delay to a terminal, the first scheduling delay is a scheduling delay indicated by DCI, the second scheduling delay comprises a scheduling delay associated with cross-carrier scheduling indicated by DCI, the first scheduling delay and the second scheduling delay are used for determining a third scheduling delay, and the third scheduling delay is used for indicating a starting position of the terminal for data transmission.

The embodiment of the application provides a chip module, including receiving and dispatching subassembly and chip, the chip for network equipment sends first dispatch delay and second dispatch delay to the terminal, first dispatch delay is the dispatch delay that DCI indicated, the second dispatch delay include with the cross carrier dispatch that DCI indicated is associated dispatch delay, first dispatch delay with the second dispatch delay is used for confirming third dispatch delay, third dispatch delay is used for instructing the starting position that the terminal carries out data transmission.

The steps of a method or algorithm described in the embodiments of the present application may be implemented in hardware, or may be implemented by executing software instructions by a processor. The software instructions may be comprised of corresponding software modules that may be stored in random access Memory (Random Access Memory, RAM), flash Memory, read Only Memory (ROM), erasable programmable Read Only Memory (Erasable Programmable ROM), electrically Erasable Programmable Read Only Memory (EEPROM), registers, hard disk, a removable disk, a compact disc Read Only Memory (CD-ROM), or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. In the alternative, the storage medium may be integral to the processor. The processor and the storage medium may reside in an ASIC. In addition, the ASIC may reside in an access network device, a target network device, or a core network device. It is of course also possible that the processor and the storage medium reside as discrete components in an access network device, a target network device, or a core network device.

Those of skill in the art will appreciate that in one or more of the above examples, the functions described in the embodiments of the present application may be implemented, in whole or in part, in software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, produces a flow or function in accordance with embodiments of the present application, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by a wired (e.g., coaxial cable, fiber optic, digital subscriber line (Digital Subscriber Line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that contains an integration of one or more available media. The usable medium may be a magnetic medium (e.g., a floppy Disk, a hard Disk, a magnetic tape), an optical medium (e.g., a digital video disc (Digital Video Disc, DVD)), or a semiconductor medium (e.g., a Solid State Disk (SSD)), or the like.

The foregoing embodiments have been provided for the purpose of illustrating the embodiments of the present application in further detail, and it should be understood that the foregoing embodiments are merely illustrative of the embodiments of the present application and are not intended to limit the scope of the embodiments of the present application, and any modifications, equivalents, improvements, etc. made on the basis of the technical solutions of the embodiments of the present application are included in the scope of the embodiments of the present application.

Claims

1. A data transmission method, comprising:

the terminal transmits data from the starting position.

2. The method of claim 1, wherein prior to the obtaining the first scheduling delay and the second scheduling delay from the network device configuration, the method further comprises:

The method comprises the steps of obtaining a first propagation delay of a first service cell and a second propagation delay of a second service cell, wherein the first propagation delay is used for indicating the propagation delay between the terminal and network equipment corresponding to the first service cell, and the second propagation delay is used for indicating the propagation delay between the terminal and the network equipment corresponding to the second service cell.

3. The method of claim 2, wherein the obtaining the first scheduling delay and the second scheduling delay from the network device configuration comprises:

acquiring a propagation delay difference corresponding to the first service cell and the second service cell according to the first propagation delay and the second propagation delay;

transmitting the propagation delay difference to the network device;

and acquiring the second scheduling time delay from the network equipment configuration, wherein the second scheduling time delay is determined by the network equipment according to the propagation time delay difference.

4. A method according to claim 3, characterized in that the value of the propagation delay difference is the absolute value of the difference between the value of the first propagation delay and the value of the second propagation delay.

5. The method of claim 2, wherein the obtaining the first scheduling delay and the second scheduling delay from the network device configuration comprises:

Transmitting the first propagation delay and the second propagation delay to the network device;

and acquiring the second scheduling time delay from the network equipment configuration, wherein the second scheduling time delay is determined by the network equipment according to the first propagation time delay and the second propagation time delay.

6. The method according to any of claims 2-5, wherein the first serving cell and the second serving cell are any two different serving cells of at least two serving cells configured by the network device for the terminal, and the terminal performs cross-carrier data transmission between the first serving cell and the second serving cell, and the terminal receives the scheduling DCI based on the first serving cell and receives the data scheduled by the scheduling DCI based on the second serving cell.

7. The method of claim 6, wherein the second scheduling delay comprises a downlink scheduling delay configured by the network device associated with the terminal performing downlink cross-carrier data transmission between the first serving cell and the second serving cell.

8. The method of claim 7, wherein the value of the third scheduling delay is determined to be the sum of the value of the first scheduling delay and the value of the second scheduling delay in the case where the value of the first propagation delay is greater than the value of the second propagation delay.

9. The method of claim 7, wherein the value of the third scheduling delay is determined as a difference between the value of the first scheduling delay and the value of the second scheduling delay in the case where the value of the first propagation delay is less than the value of the second propagation delay.

10. The method of claim 6, wherein the determining a third scheduling delay from the first scheduling delay and the second scheduling delay comprises:

and determining that the value of the third scheduling delay is the sum of the value of the first scheduling delay and the value of the second scheduling delay.

11. The method of claim 10, wherein the second scheduling delay comprises an uplink scheduling delay configured by the network device and a fourth scheduling delay, the uplink scheduling delay being a scheduling delay associated with the terminal performing uplink cross-carrier data transmission between the first serving cell and the second serving cell, the fourth scheduling delay being an additional scheduling delay k_offset associated with the first serving cell or the second serving cell in non-terrestrial network communication.

12. The method of claim 11, wherein the value of the second scheduling delay is a sum of the value of the uplink scheduling delay and the value of the fourth scheduling delay in the case where the value of the first propagation delay is greater than the value of the second propagation delay.

13. The method of claim 11, wherein the value of the second scheduling delay is a difference between the value of the uplink scheduling delay and the value of the fourth scheduling delay in the case where the value of the first propagation delay is less than the value of the second propagation delay.

14. The method of claim 10, wherein the second scheduling delay comprises a scheduling delay associated with the first serving cell or the second serving cell when the terminal performs uplink cross-carrier data transmission between the first serving cell and the second serving cell in non-terrestrial network communication.

15. A data transmission method, comprising:

16. The method of claim 15, wherein before the sending the first scheduling delay and the second scheduling delay to the terminal, the method further comprises:

Acquiring a propagation delay difference corresponding to a first service cell and a second service cell, which are reported by the terminal, wherein the first propagation delay is used for indicating the propagation delay between the terminal and network equipment corresponding to the first service cell, and the second propagation delay is used for indicating the propagation delay between the terminal and the network equipment corresponding to the second service cell;

and determining the second scheduling delay according to the propagation delay difference.

17. The method of claim 16, wherein the value of the propagation delay difference is an absolute value of a difference between the value of the first propagation delay and the value of the second propagation delay.

18. The method of claim 15, wherein before the sending the first scheduling delay and the second scheduling delay to the terminal, the method further comprises:

acquiring a first propagation delay from a first service cell reported by the terminal and a second propagation delay from the second service cell;

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

19. The method according to any of claims 16-18, wherein the first serving cell and the second serving cell are any two different serving cells of at least two serving cells configured by the network device for the terminal, and wherein the network device performs cross-carrier scheduling between the first serving cell and the second serving cell, wherein the network device transmits scheduling DCI based on the first serving cell, and wherein the network device transmits data scheduled by the scheduling DCI based on the second serving cell.

20. The method of claim 19, wherein the second scheduling delay comprises a scheduling delay associated with the network device performing downlink cross-carrier scheduling between the first serving cell and the second serving cell.

21. The method of claim 19, wherein the second scheduling delay comprises an uplink scheduling delay configured by the network device and a fourth scheduling delay, the uplink scheduling delay being a scheduling delay associated with the network device performing uplink cross-carrier scheduling between the first serving cell and the second serving cell, the fourth scheduling delay being an additional scheduling delay k_offset associated with the first serving cell or the second serving cell in non-terrestrial network communications.

22. The method of claim 19, wherein the second scheduling delay comprises a scheduling delay associated with the first serving cell or the second serving cell when the network device performs uplink cross-carrier scheduling between the first serving cell and the second serving cell in non-terrestrial network communications.

23. A data transmission apparatus, comprising:

The processing unit is used for acquiring a first scheduling time delay and a second scheduling time delay from network equipment configuration by the terminal, wherein the first scheduling time delay is a scheduling time delay indicated by downlink control information DCI, the second scheduling time delay comprises a scheduling time delay associated with cross-carrier scheduling indicated by the DCI, the terminal is used for determining a third scheduling time delay according to the first scheduling time delay and the second scheduling time delay, and the third scheduling time delay is used for indicating a starting position of the terminal for data transmission;

and the transmission unit is used for transmitting data from the starting position by the terminal.

24. A data transmission apparatus, comprising:

the network equipment comprises a sending unit, a receiving unit and a scheduling unit, wherein the sending unit is used for sending a first scheduling delay and a second scheduling delay to a terminal, the first scheduling delay is a scheduling delay indicated by DCI, the second scheduling delay comprises a scheduling delay associated with cross-carrier scheduling indicated by the DCI, the first scheduling delay and the second scheduling delay are used for determining a third scheduling delay, and the third scheduling delay is used for indicating a starting position of the terminal for data transmission.

25. A terminal comprising a processor, a memory, and one or more programs stored in the memory and configured to be executed by the processor, the programs comprising instructions for performing the steps in the method of any of claims 1-14.

26. A network device comprising a processor, a memory, and one or more programs stored in the memory and configured to be executed by the processor, the programs comprising instructions for performing the steps in the method of any of claims 15-22.

27. A computer-readable storage medium, characterized in that a computer program for electronic data exchange is stored, wherein the computer program causes a computer to perform the method of any one of claims 1-14 or any one of claims 15-22.

28. A computer program product comprising a computer program or instructions which, when executed by a processor, carries out the steps of the method of any one of claims 1 to 14 or any one of claims 15 to 22.