Data transmission method and device and computer readable storage medium

Abstract

A data transmission method and apparatus, and a computer readable storage medium, the method comprising: receiving first information, the first information being used for indicating a number of repetition times of a physical downlink shared channel (PDSCH); receiving data transmitted by the PDSCH according to the PDSCH repetition times; wherein the first information comprises at least one of the following items: a PDSCH (Physical Downlink Shared Channel) repetition frequency indication field, uplink data scheduling time delay, a PDCCH (Physical Downlink Control Channel) repetition frequency and a transmission configuration indication field. Through the scheme of the invention, the PDSCH repetition times can be flexibly indicated, the physical channel coverage performance in an NTN scene is enhanced, and the downlink data transmission performance is improved.

Description

Technical Field

[0001] The present invention relates to the field of communication technologies, and particularly to a data transmission method, an apparatus, and a computer-readable storage medium. Background Art

[0002] In a satellite communication system, the satellite altitude can reach several hundred to several tens of thousands of kilometers, resulting in a huge path loss between the terminal and the satellite. To ensure the performance of downlink data transmission, it is necessary to enhance the coverage of downlink physical channels (such as Physical Downlink Shared Channel (PDSCH for short), Physical Downlink Control Channel (PDCCH for short), etc.). The most direct way to enhance the coverage performance of physical channels is to perform repeated transmission, such as PDSCH repeated transmission, PDCCH repeated transmission, etc. For the repeated transmission of downlink physical channels, it is necessary to solve the problem of how the terminal flexibly determines the number of repetitions. Summary of the Invention

[0003] The technical problem solved by the present invention is how to flexibly indicate the number of PDSCH repetitions to enhance the coverage performance of physical channels in the NTN scenario.

[0004] To solve the above technical problem, an embodiment of the present invention provides a data transmission method, including: receiving first information, where the first information is used to indicate the number of repetitions of the Physical Downlink Shared Channel (PDSCH); receiving data transmitted by the PDSCH according to the number of PDSCH repetitions; where the first information includes at least one of the following: a PDSCH repetition number indication field, an uplink data scheduling delay, the number of repetitions of the Physical Downlink Control Channel (PDCCH), and a transmission configuration indication field.

[0005] Optionally, the data transmission method further includes: receiving second information, where the second information includes a time domain resource allocation field.

[0006] Optionally, the number of PDSCH repetitions is the larger value or the sum of a first target number and a second target number, where the first target number is indicated by the PDSCH repetition number indication field, and the second target number is indicated by the time domain resource allocation field.

[0007] Optionally, the data transmission method further includes: receiving third information, where the third information includes at least one time domain resource allocation index and at least one PDSCH repetition number candidate value associated with each time domain resource allocation index.

[0008] Optionally, the PDSCH repetition count is determined from at least one PDSCH repetition count candidate value according to the PDSCH repetition count indication field, and the at least one PDSCH repetition count candidate value is associated with the time domain resource allocation index indicated by the time domain resource allocation field.

[0009] Optionally, the third information is carried by higher layer signaling.

[0010] Optionally, the first information and / or the second information is carried by downlink control information.

[0011] Optionally, the data transmission method further includes: receiving fourth information, where the fourth information includes at least one uplink data scheduling delay interval and the PDSCH repetition count candidate value corresponding to each of the at least one uplink data scheduling delay interval.

[0012] Optionally, the PDSCH repetition count is the PDSCH repetition count candidate value corresponding to the uplink data scheduling delay interval to which the uplink data scheduling delay indicated by the first information belongs.

[0013] Optionally, the data transmission method further includes: receiving second information, where the second information includes a time domain resource allocation field.

[0014] Optionally, the PDSCH repetition count is the larger value or the sum of a third target count and a second target count, where the second target count is indicated by the time domain resource allocation field, and the third target count is the PDSCH repetition count candidate value corresponding to the uplink data scheduling delay interval to which the uplink data scheduling delay indicated by the first information belongs.

[0015] Optionally, the first information is carried by a Media Access Control layer Control Element (MAC CE) or system information.

[0016] Optionally, the data transmission method further includes: receiving fifth information, where the fifth information is used to indicate the association relationship between the PDCCH repetition count and the PDSCH repetition count.

[0017] Optionally, the association relationship between the PDCCH repetition count and the PDSCH repetition count includes the proportionality coefficient between the PDCCH repetition count and the PDSCH repetition count.

[0018] Optionally, the first information is carried by higher layer signaling.

[0019] Optionally, the data transmission method further includes: receiving sixth information, where the sixth information includes at least one transmission configuration indication status and the PDSCH repetition times corresponding to each of the transmission configuration indication statuses, and the transmission configuration indication field is used to indicate the transmission configuration indication status.

[0020] Optionally, the sixth information is carried by high-layer signaling, and / or the first information is carried by downlink control information.

[0021] To solve the above technical problems, an embodiment of the present invention further provides a data transmission method, including: sending first information, where the first information is used to indicate the physical downlink shared channel (PDSCH) repetition times; transmitting data through the PDSCH according to the PDSCH repetition times; where the first information includes at least one of the following: a PDSCH repetition times indication field, an uplink data scheduling delay, a physical downlink control channel (PDCCH) repetition times, and a transmission configuration indication field.

[0022] Optionally, the data transmission method further includes: sending second information, where the second information includes a time domain resource allocation field.

[0023] Optionally, the PDSCH repetition times is the larger value or the sum of a first target number and a second target number, where the first target number is indicated by the PDSCH repetition times indication field, and the second target number is indicated by the time domain resource allocation field.

[0024] Optionally, the data transmission method further includes: sending third information, where the third information includes at least one time domain resource allocation index and at least one PDSCH repetition times candidate value associated with each of the time domain resource allocation indexes.

[0025] Optionally, the PDSCH repetition times is determined from at least one PDSCH repetition times candidate value according to the PDSCH repetition times indication field, and the at least one PDSCH repetition times candidate value is associated with the time domain resource allocation index indicated by the time domain resource allocation field.

[0026] Optionally, the data transmission method further includes: sending fourth information, where the fourth information includes at least one uplink data scheduling delay interval and the PDSCH repetition times candidate values corresponding to each of the uplink data scheduling delay intervals.

[0027] Optionally, the PDSCH repetition count is the candidate value of the PDSCH repetition count corresponding to the uplink data scheduling delay range indicated by the first information; and / or, the PDSCH repetition count is the larger value or the sum of the third target count and the second target count, where the second target count is indicated by the time domain resource allocation field, the third target count is the candidate value of the PDSCH repetition count corresponding to the uplink data scheduling delay range indicated by the first information, and the time domain resource allocation field is obtained from the second information.

[0028] Optionally, the data transmission method further includes: sending a fifth piece of information, where the fifth piece of information is used to indicate the association relationship between the PDCCH repetition count and the PDSCH repetition count.

[0029] Optionally, the data transmission method further includes: sending a sixth piece of information, where the sixth piece of information includes at least one transmission configuration indication state and the PDSCH repetition count corresponding to each of the transmission configuration indication states, and the transmission configuration indication field is used to indicate the transmission configuration indication state.

[0030] To solve the above technical problems, an embodiment of the present invention further provides a data transmission device, including: a first receiving module, configured to receive first information, where the first information is used to indicate the physical downlink shared channel PDSCH repetition count; a second receiving module, configured to receive data transmitted by the PDSCH according to the PDSCH repetition count; where the first information includes at least one of the following: a PDSCH repetition count indication field, an uplink data scheduling delay, a physical downlink control channel PDCCH repetition count, and a transmission configuration indication field.

[0031] To solve the above technical problems, an embodiment of the present invention further provides a data transmission device, including: a sending module, configured to send first information, where the first information is used to indicate the physical downlink shared channel PDSCH repetition count; a transmission module, configured to transmit data through the PDSCH according to the PDSCH repetition count; where the first information includes at least one of the following: a PDSCH repetition count indication field, an uplink data scheduling delay, a physical downlink control channel PDCCH repetition count, and a transmission configuration indication field.

[0032] To solve the above technical problems, an embodiment of the present invention further provides a computer-readable storage medium, where the computer-readable storage medium is a non-volatile storage medium or a non-transient storage medium, and a computer program is stored thereon. When the computer program is run by a processor, the steps of the above method are executed.

[0033] To solve the above technical problems, an embodiment of the present invention further provides a data transmission device, including a memory and a processor. A computer program that can run on the processor is stored on the memory. When the processor runs the computer program, it executes the steps of the above method.

[0034] Compared with the prior art, the technical solution of the embodiment of the present invention has the following beneficial effects:

[0035] On the terminal side, an embodiment of the present invention provides a data transmission method, including: receiving first information, where the first information is used to indicate the repetition times of the physical downlink shared channel PDSCH; receiving the data transmitted by the PDSCH according to the PDSCH repetition times; where the first information includes at least one of the following: PDSCH repetition times indication field, uplink data scheduling delay, physical downlink control channel PDCCH repetition times, and transmission configuration indication field.

[0036] Compared with the prior art's repetition times indication method bound to time domain resource scheduling, this embodiment flexibly indicates the PDSCH repetition times through the first information, enabling the network to perform downlink data scheduling according to the PDSCH repetition times more suitable for the current communication scenario to ensure downlink coverage performance. Correspondingly, the terminal can receive downlink data according to the PDSCH repetition times more suitable for the current communication scenario. Thus, it is beneficial to enhance the physical channel coverage performance in the NTN scenario and improve the downlink data transmission performance.

[0037] On the network side, an embodiment of the present invention provides a data transmission method, including: sending first information, where the first information is used to indicate the repetition times of the physical downlink shared channel PDSCH; transmitting data through the PDSCH according to the PDSCH repetition times; where the first information includes at least one of the following: PDSCH repetition times indication field, uplink data scheduling delay, physical downlink control channel PDCCH repetition times, and transmission configuration indication field.

[0038] Compared with the prior art's repetition times indication method bound to time domain resource scheduling, this embodiment flexibly indicates the PDSCH repetition times through the first information, enabling the network to flexibly indicate a more suitable PDSCH repetition times for the terminal according to the current communication scenario, so as to enhance the downlink physical channel coverage at the terminal side and ensure the performance of downlink data transmission. Description of the Drawings

[0039] Figure 1 It is a schematic diagram of an uplink data scheduling delay provided by this application;

[0040] Figure 2 It is a signaling interaction diagram of a data transmission method according to an embodiment of this application;

[0041] Figure 3 It is a schematic structural diagram of a data transmission device according to an embodiment of the present application;

[0042] Figure 4 It is a schematic structural diagram of another data transmission device according to an embodiment of the present application. Detailed implementation manners

[0043] As mentioned in the background art, for the repeated transmission of the downlink physical channel, it is necessary to solve the problem of how the terminal flexibly determines the number of repetitions to meet the physical channel coverage enhancement requirements in the NTN (Non-terrestrial networks, that is, satellite communication) scenario.

[0044] Specifically, in the existing protocol, the PDCCH in the new radio (NR) system of the fifth-generation mobile communication technology (5G) does not support repeated transmission and only supports PDSCH repeated transmission.

[0045] For the PDSCH repeated transmission, the existing protocol binds the number of repetitions to the time-domain resource scheduling. The network will configure a time domain recourse allocation (TDRA) table, and each row in the table corresponds to the scheduling delay, start symbol, symbol length of the PDSCH, and the number of PDSCH repetitions. When the network performs PDSCH resource scheduling, it will indicate a row in the TDRA table in the downlink control information (DCI) (there is a PDSCH time-domain resource indication field in the DCI), and the terminal determines the time-domain resources of the PDSCH and the corresponding number of PDSCH repetitions through the time-domain resource indication field.

[0046] Since the current protocol binds the PDSCH number of repetitions to the time-domain resource allocation, the PDSCH transmitted using specific time-domain resources can only be transmitted according to the number of repetitions uniquely corresponding to the specific time-domain resources. This results in the indication of the existing PDSCH number of repetitions being insufficiently flexible. Considering the characteristics of the rapid movement of satellites in the NTN scenario, a more flexible PDSCH number of repetitions indication method needs to be introduced.

[0047] To solve the above technical problems, an embodiment of the present invention provides a data transmission method, including: receiving first information, where the first information is used to indicate the number of repetitions of a Physical Downlink Shared Channel (PDSCH); receiving data transmitted by the PDSCH according to the number of repetitions of the PDSCH; where the first information includes at least one of the following: a PDSCH repetition number indication field, an uplink data scheduling delay, the number of repetitions of a Physical Downlink Control Channel (PDCCH), and a transmission configuration indication field.

[0048] Adopting this implementation solution, by flexibly indicating the number of repetitions of the PDSCH through the first information, the network can perform downlink data scheduling according to the number of repetitions of the PDSCH that is more suitable for the current communication scenario to ensure downlink coverage performance. Thus, it is beneficial to enhance the coverage performance of the physical channel in the NTN scenario and improve the downlink data transmission performance.

[0049] The terminal in the embodiments of this application is a device with wireless communication capabilities, which can be referred to as a user, user terminal, terminal device, mobile station (MS), mobile terminal (MT), access terminal device, in-vehicle terminal device, industrial control terminal device, user equipment (UE for short), UE unit, UE station, mobile station, remote station, remote terminal device, mobile device, UE terminal device, wireless communication device, UE agent, or UE device, etc. The user terminal can be fixed or mobile. It should be noted that the user terminal can support at least one wireless communication technology, such as Long Term Evolution (LTE for short), new radio (NR), etc. For example, the user terminal can be a mobile phone, tablet (pad), desktop computer, laptop computer, all-in-one computer, in-vehicle terminal, virtual reality (VR) terminal device, augmented reality (AR) terminal device, wireless terminal in industrial control, wireless terminal in self-driving, wireless terminal in remote medical surgery, wireless terminal in smart grid, wireless terminal in transportation safety, wireless terminal in smart city, wireless terminal in smart home, cellular phone, cordless phone, session initiation protocol (SIP) phone, wireless local loop (WLL) station, personal digital assistant (PDA), handheld device with wireless communication capabilities, computing device, or other processing devices connected to a wireless modem, wearable device, terminal device in a future mobile communication network, or terminal device in a future evolved public land mobile network (PLMN), etc. In some embodiments of this application, the user terminal can also be a device with transceiver functions, such as a chip system. Among them, the chip system can include a chip and can also include other discrete devices.

[0050] The network device in the embodiments of the present application is a device that provides wireless communication functions for user terminals, and can also be referred to as an access network device, a radio access network (RAN) device, or an access network network element, etc. Among them, the network device can support at least one wireless communication technology, such as LTE, NR, etc. Exemplarily, the network device includes, but is not limited to: the next-generation base station (generation node B, gNB), evolved node B (eNB), radio network controller (RNC), node B (NB), base station controller (BSC), base transceiver station (BTS), home base station (e.g., home evolved node B, or home node B, HNB), baseband unit (BBU), transmitting and receiving point (TRP), transmitting point (TP), mobile switching center, etc. in the fifth-generation mobile communication system (5th-generation, 5G). The network device can also be a wireless controller, a centralized unit (CU), and / or a distributed unit (DU) in the cloud radio access network (CRAN) scenario, or the access network device can be a relay station, an access point, a vehicle-mounted device, a terminal device, a wearable device, and a network device in future mobile communications or a network device in a future evolved PLMN, etc. In some embodiments, the network device can also be a device with the function of providing wireless communication for user terminals, such as a chip system. Exemplarily, the chip system can include a chip and can also include other discrete devices.

[0051] The uplink data scheduling delay in the embodiments of the present application is characterized by a delay value K_offset and is used to enhance the timing relationship of uplink and downlink interactions. Specifically, the timing of receiving downlink data (e.g., PDSCH) is separately referenced to the downlink timing and is not affected by the misalignment of uplink and downlink frame timings on the terminal side. Therefore, the timing relationship for PDSCH reception does not need to be enhanced. However, other timing relationships involving uplink and downlink interactions need to be enhanced. One way is to add a delay value K_offset to the existing various transmission timings involving uplink and downlink interactions. The timing relationships that need to be enhanced (i.e., the delay value K_offset is introduced) include:

[0052] 1) Timing of uplink data transmission scheduled by Downlink Control Information (DCI), including channel state information carried on the Physical Uplink Shared Channel (PUSCH);

[0053] 2) Timing of uplink data transmission scheduled by random access response (RAR) (including RAR and fallback RAR (FallbackRAR));

[0054] 3) Timing of the first uplink data transmission opportunity in preconfigured resource type 2;

[0055] 4) Transmission timing of the Hybrid Automatic Repeat reQuest (HARQ) ACKnowledgement (ACK) mechanism carried on the Physical Uplink Control Channel (PUCCH);

[0056] 5) Transmission timing of the Physical Random Access Channel (PRACH) triggered by a Physical Downlink Control Channel (PDCCH) order;

[0057] 6) Effective delay of the Timing Advance (TA) adjustment command (TA command);

[0058] 7) Transmission timing of the aperiodic Sounding Reference Signal (SRS);

[0059] 8) Timing of the Channel State Information (CSI) reference resource.

[0060] Taking the DCI scheduling of uplink data transmission as an example, assume that the terminal receives the DCI in time slot n. According to the resource scheduling method of terrestrial mobile communication, a scheduling delay value k2 will be indicated in the DCI. The terminal determines the time slot where the data transmission is located according to the scheduling delay value k2, that is, the uplink data transmission is performed in time slot n + K2. In the satellite communication system, due to the large offset between the uplink and downlink frame timings on the terminal side, or rather, a large timing advance needs to be applied when the terminal sends uplink data, the scheduling delay (i.e., the scheduling delay value k2) in the existing terrestrial communication system cannot meet the requirements of the terminal's large timing advance. Therefore, it is necessary to further increase the scheduling delay on the basis of the uplink data scheduling delay of the existing terrestrial communication, that is, add a delay value K_offset to the existing scheduling delay value k2. The terminal determines the final scheduling delay according to the scheduling delay k2 indicated in the DCI and the delay value K_offset configured by the higher layer.

[0061] Reference Figure 1 , the terminal receives the DCI in time slot n, and determines the time-domain resource position of the uplink data transmission according to the DCI indication and the delay value K_offset configured by the higher layer as time slot m = time slot n + k2 + K_offset. Further, the actual position where the terminal sends the uplink data also needs to be advanced according to the determined timing advance.

[0062] To make the above objects, features, and beneficial effects of the present invention more obvious and understandable, the following will describe the specific embodiments of the present invention in detail with reference to the accompanying drawings.

[0063] Figure 2 It is a signaling interaction diagram of a data transmission method according to an embodiment of the present application. This implementation can be applied to a satellite communication system, specifically to the downlink coverage enhancement scenario in NTN.

[0064] In specific implementation, in the data transmission method provided in the following steps S101 to S102, the actions performed by the terminal can be performed by a chip with data transmission function in the terminal, or by the baseband chip in the terminal. The actions performed by the network device can be performed by a chip with data transmission function in the network device, or by the baseband chip in the network device.

[0065] Specifically, referring to Figure 1 , the data transmission method described in this implementation can include the following steps:

[0066] Step S101, the network device sends the first information to the terminal, where the first information is used to indicate the PDSCH repetition times. Correspondingly, the terminal receives the first information

[0067] Step S102, the network device transmits data via PDSCH according to the PDSCH repetition count. Correspondingly, the terminal receives the data transmitted by the network via PDSCH according to the PDSCH repetition count.

[0068] Wherein, the first information includes at least one of the following: PDSCH repetition count indication field, uplink data scheduling delay, PDCCH repetition count, and transmission configuration indication field. Next, the specific implementation of the terminal determining the PDSCH repetition count when the first information includes each parameter will be elaborated in detail respectively.

[0069] In a specific implementation, the first information may include a PDSCH repetition count indication field. Specifically, a PDSCH repetition count indication field is set in the downlink control information DCI to carry the first information, and the first information indicates a first target count.

[0070] For the NTN scenario, the network device may configure multiple PDSCH repetition count candidate values. For example, multiple PDSCH repetition count candidate values may be pre-configured through higher layer signaling, and the higher layer signaling may be, for example, Radio Resource Control (RRC) signaling.

[0071] Further, when scheduling the PDSCH, the network device may indicate a value to the terminal from the configured multiple PDSCH repetition count candidate values through the PDSCH repetition count indication field in the DCI. For example, the network device may select a suitable PDSCH repetition count candidate value according to the channel state of the terminal and indicate it to the terminal through the PDSCH repetition count indication field.

[0072] Correspondingly, the terminal determines the PDSCH repetition count candidate value indicated by the PDSCH repetition count indication field in the first information as the first target count.

[0073] Further, before / after / simultaneously with step S101, the data transmission method described in this implementation may further include the step: the network device sends second information to the terminal, and the second information includes a time domain resource allocation field (which may also be referred to as a time domain resource allocation indication field). Correspondingly, the terminal receives the second information.

[0074] The time domain resource allocation field may be used to indicate a second target count, and its specific indication method may follow the existing technology. That is, the time domain resources of this scheduling and the corresponding second target count are indicated through a pre-configured time domain resource allocation table.

[0075] In some embodiments, the second information may be carried by DCI, for example, and the DCI may be used for PDSCH scheduling. For example, the PDSCH repetition count indication field and the time domain resource allocation field may be two independent bit fields in the same DCI.

[0076] Further, based on the first information and the second information, the terminal may determine the PDSCH repetition count used in step S102 according to the first target count and the second target count.

[0077] For example, the PDSCH repetition count may be the larger value of the first target count and the second target count.

[0078] For another example, the PDSCH repetition count may be the sum of the first target count and the second target count.

[0079] Thus, by introducing the PDSCH repetition count indication field, the terminal determines the PDSCH repetition count according to the PDSCH repetition count indication field and the TDRA field.

[0080] In a specific implementation, before step S101, the data transmission method according to this embodiment may further include the step of: the network device sending third information to the terminal, where the third information includes at least one time domain resource allocation index and at least one PDSCH repetition count candidate value associated with each time domain resource allocation index. Correspondingly, the terminal receives the third information.

[0081] Specifically, the network device may configure a new time domain resource allocation table (abbreviated as TDRA-list), and each row in this TDRA table corresponds to multiple PDSCH repetition count candidate values. In this example, the new time domain resource allocation table (denoted as time domain resource allocation table 1) refers to a new association table independent of the time domain resource allocation table (denoted as time domain resource allocation table 2) used in the existing terrestrial communication scenario. The main differences between the two include: one row in time domain resource allocation table 1 corresponds to a time domain resource allocation index and at least one PDSCH repetition count candidate value, and one row in time domain resource allocation table 2 corresponds to a time domain resource allocation index and a PDSCH repetition count.

[0082] An example of the time domain resource allocation table 1 is shown in the following table:

[0083] Time domain resource allocation index Time domain resource allocation Candidate values for PDSCH repetition times 0 Parameter set 0 2，4 1 Parameter set 1 4，8 2 Parameter set 2 8，16 3 Parameter set 3 16，32

[0084] Among them, the time domain resource allocation represents the time domain resources for PDSCH scheduling, and each row corresponds to resource time domain position information represented by a parameter set. The parameters in the parameter set may include, for example, the scheduling delay, start symbol, and symbol length of the PDSCH.

[0085] The time-domain resource allocation table 2 is exemplary as shown in the following table:

[0086]

[0087]

[0088] Furthermore, the PDSCH repetition count can be determined from at least one PDSCH repetition count candidate value according to the PDSCH repetition count indication field, and the at least one PDSCH repetition count candidate value is associated with the time-domain resource allocation index indicated by the time-domain resource allocation field.

[0089] For example, the terminal determines the resources scheduled for the current PDSCH and the corresponding at least one PDSCH repetition count candidate value through the time-domain resource allocation field in the second information. Then, the terminal determines the PDSCH repetition count from at least one PDSCH repetition count candidate value according to the PDSCH repetition count indication field in the first information.

[0090] Taking the aforementioned time-domain resource allocation table 1 as an example, assuming that the time-domain resource allocation index indicated by the time-domain resource allocation field in the second information (e.g., DCI scheduling the PDSCH) is 1, the PDSCH repetition count candidate values corresponding to the current PDSCH scheduling are 4 and 8. Furthermore, the PDSCH repetition count is determined according to the PDSCH repetition count indication field in the first information (e.g., DCI scheduling the PDSCH). For example, if the value of the PDSCH repetition count indication field in the first information is 1, it means that the PDSCH repetition count for this PDSCH scheduling is 8, and the data of the PDSCH transmission is repeatedly received 8 times in step 102.

[0091] In some embodiments, the third information can be carried by higher-layer signaling (e.g., RRC signaling).

[0092] Thus, a time-domain resource allocation table is introduced, each row corresponding to at least one PDSCH repetition count candidate value, and a PDSCH repetition count indication field is introduced in the first information. The terminal determines the specific values of the time-domain resources and the PDSCH repetition count for the PDSCH scheduled this time according to the repetition count indication field and the time-domain resource allocation field.

[0093] In some embodiments, the network device can configure different numbers of PDSCH repetition count candidate values for the terminal for different communication scenarios. That is, the network device can configure multiple time-domain resource allocation tables for the terminal, and different tables correspond to different communication scenarios.

[0094] For example, for terrestrial communication scenarios, existing technologies can be followed, that is, a time-domain resource allocation table 1 is configured for the terminal, and each row of which configures a candidate value of the PDSCH repetition count. The network device indicates the time-domain resources scheduled for the terminal and simultaneously indicates the PDSCH repetition count when the terminal performs terrestrial communication.

[0095] For another example, for NTN scenarios, a time-domain resource allocation table 2 can be configured for the terminal, and each row of which configures multiple candidate values of the PDSCH repetition count. The network device indicates the time-domain resources scheduled for the terminal and also indicates one of the multiple candidate values of the PDSCH repetition count corresponding to the time-domain resources through the PDSCH repetition count indication field. Correspondingly, the terminal receives the data transmitted by the PDSCH using the scheduled time-domain resources and the specific candidate value of the PDSCH repetition count indicated by the network device.

[0096] In a variant, the time-domain resource allocation table 1 and the time-domain resource allocation table 2 can be combined into one table for configuration. Among them, each row of the time-domain resource allocation index in the first n rows corresponds to a PDSCH repetition count (candidate value) for terrestrial communication scenarios; each row of the time-domain resource allocation index in the last m rows corresponds to at least multiple candidate values of the PDSCH repetition count for NTN scenarios. Both m and n are positive integers greater than or equal to 1.

[0097] In a specific implementation, the first information may include the uplink data scheduling delay K_offset.

[0098] Specifically, the magnitude of the uplink data scheduling delay K-offset can reflect the distance between the terminal and the satellite. Generally speaking, the greater the distance between the terminal and the satellite, the greater the number of repetitions required for the downlink PDSCH transmission. Based on this principle, the terminal can determine the magnitude of the PDSCH repetition count according to the magnitude of the uplink data scheduling delay K_offset.

[0099] Further, before / after / simultaneously with step S101, the data transmission method described in this embodiment may further include the step: the network device sends fourth information, and the fourth information includes at least one uplink data scheduling delay interval and the candidate value of the PDSCH repetition count corresponding to each of the uplink data scheduling delay intervals. Correspondingly, the terminal receives the fourth information.

[0100] The network device can configure or the protocol can stipulate the mapping relationship between the value of the uplink data scheduling delay K_offset and the PDSCH repetition count. That is, different value ranges of the uplink data scheduling delay K_offset (i.e., uplink data scheduling delay intervals) can correspond to different candidate values of the PDSCH repetition count.

[0101] The mapping relationship between the uplink data scheduling delay interval and the candidate values of the PDSCH repetition times is exemplarily shown in Table 3 as follows:

[0102] Table 3

[0103]

[0104]

[0105] Wherein, Xn represents repeating n times, n ∈ [1, 4]; Mm represents the value of the uplink data scheduling delay, m ∈ [1, 4].

[0106] Based on the mapping relationship shown in Table 3, the terminal can determine the PDSCH repetition times according to the uplink data scheduling delay K-offset configured by the network device in the first information. That is to say, the PDSCH repetition times can be the candidate values of the PDSCH repetition times corresponding to the uplink data scheduling delay interval to which the uplink data scheduling delay indicated by the first information belongs.

[0107] For example, in the connected state, the network device can indicate an uplink data scheduling delay K_offset at the terminal level through a Medium Access Control-Control Element (MAC-CE for short). The terminal can determine the uplink data scheduling delay K_offset value at the terminal level according to the uplink data scheduling delay K_offset indicated by the MAC-CE, and then determine the PDSCH repetition times corresponding to the current PDSCH transmission according to the uplink data scheduling delay interval where the uplink data scheduling delay K_offset value is located.

[0108] For another example, in the non-connected state, since the network device can only configure an uplink data scheduling delay K_offset value at the cell level through system information. Therefore, the terminal can use the uplink data scheduling delay K_offset value at the cell level to determine the PDSCH repetition times corresponding to the PDSCH transmission in the non-connected state. For example, the terminal can determine the repetition times of the paging PDSCH according to the uplink data scheduling delay K_offset.

[0109] In some embodiments, the first information can be carried by a MAC-CE or system information.

[0110] Thus, through the uplink configuration or protocol regulations, there is a mapping relationship between the uplink data scheduling delay k_offset and the PDSCH repetition times, and the terminal can directly determine the PDSCH repetition times according to the uplink data scheduling delay k_offset indicated by the first information.

[0111] In a variant, based on the mapping relationship between the uplink data scheduling delay k_offset and the PDSCH repetition number specified by uplink configuration or protocol, the terminal can comprehensively determine the PDSCH repetition number based on the TDRA indication and the value of the uplink data scheduling delay k_offset indicated by the first information.

[0112] Specifically, it is possible to determine the uplink data scheduling delay interval to which the value of the uplink data scheduling delay k_offset indicated by the first information belongs, and determine the candidate value of the PDSCH repetition number corresponding to this interval as the third target number.

[0113] Furthermore, the PDSCH repetition number can be jointly determined based on the second target number and the third target number. For example, the PDSCH repetition number can be the larger value of the third target number and the second target number or the sum of the two.

[0114] Alternatively, the PDSCH repetition number jointly indicated by the time domain resource allocation table 1 and the PDSCH repetition number indication field in the first information can be denoted as the fourth target number, and the terminal can jointly determine the finally used PDSCH repetition number in step S102 based on the fourth target number and the third target number. For example, the sum of the fourth target number and the third target number can be determined as the PDSCH repetition number.

[0115] In a specific implementation, the first information may include the PDCCH repetition number.

[0116] Specifically, the first information can be carried by high-layer signaling, for example, carried by RRC signaling.

[0117] Furthermore, there may be a mapping relationship between the PDCCH repetition number and the PDSCH repetition number. Before step S101, the data transmission method described in this implementation scheme may further include the step: the network device sends the fifth information, and the fifth information is used to indicate the association relationship between the PDCCH repetition number and the PDSCH repetition number. Correspondingly, the terminal receives the fifth information.

[0118] In some embodiments, the network device can configure or the protocol can specify the mapping relationship between the PDCCH repetition number and the PDSCH repetition number. For example, one value of the PDCCH repetition number corresponds to one PDSCH repetition number.

[0119] In some embodiments, the association relationship indicated by the fifth information may include the proportionality coefficient between the PDCCH repetition count and the PDSCH repetition count. For example, the network device may configure a proportionality coefficient X, and the terminal determines the PDSCH repetition count based on the PDCCH repetition count configured according to the first information and the proportionality coefficient X indicated by the fifth information. Assuming the PDCCH repetition count is M and the proportionality coefficient is X, the PDSCH repetition count is X * M, where * represents multiplication.

[0120] Thus, the PDSCH repetition count is determined according to the high-layer configuration. Specifically, an association relationship is established between the PDCCH repetition count and the PDSCH repetition count, and the terminal scales the PDCCH repetition count to obtain the PDSCH repetition count.

[0121] In a variation, the PDSCH repetition count determined based on the association relationship configured according to the fifth information and the PDCCH repetition count indicated by the first information may be denoted as the fifth target count, and the terminal may jointly determine the PDSCH repetition count based on the fifth target count and the second target count. In this variation, the terminal receives the first information sent by the high-layer signaling to obtain the PDCCH repetition count, and also receives the DCI scheduling the PDSCH to obtain the time-domain resource allocation field.

[0122] In a variation, the PDSCH repetition count may be jointly determined based on the fifth target count and the third target count. In this variation, the terminal receives the first information sent by the high-layer signaling to obtain the PDCCH repetition count, receives the third information sent by the RRC signaling to obtain the time-domain resource allocation table 1, and also receives the DCI scheduling the PDSCH to obtain the time-domain resource allocation field.

[0123] In a specific implementation, the first information may include a Transmission Configuration Indicator (TCI) field (also referred to as the TCI status indicator field) for indicating the TCI status. Specifically, the first information may be carried by DCI, such as by the DCI scheduling the PDSCH.

[0124] Furthermore, there may be a mapping relationship between the TCI field and the PDSCH repetition count. Before step S101, the data transmission method described in this implementation scheme may further include the step: the network device sends the sixth information, and the sixth information includes at least one TCI status and the PDSCH repetition count corresponding to each of the TCI statuses. Correspondingly, the terminal receives the sixth information. In some embodiments, the sixth information may be carried by high-layer signaling, such as by RRC signaling.

[0125] Generally speaking, the distances between terminals and satellites under different beam coverages are different. Based on this phenomenon, different PDSCH repetition times can be configured for different beams. In the protocol, different TCI states correspond to different beams. Therefore, the network device can configure the PDSCH repetition times corresponding to different TCI states through high-layer signaling, and the terminal determines the PDSCH repetition times through the TCI indication field in the PDSCH scheduling DCI.

[0126] For example, three TCI states (denoted as TCI state 1, TCI state 2, and TCI state 3 respectively) are configured in the RRC signaling, where the value of the PDSCH repetition times corresponding to TCI state 1 is 2 times, the value of the PDSCH repetition times corresponding to TCI state 2 is 4 times, and the value of the PDSCH repetition times corresponding to TCI state 3 is 6 times. Further, the network device executes step S101 to send the first information to the terminal, and the TCI field in the first information indicates TCI state 2. Correspondingly, the terminal receives the data transmitted by the PDSCH with 4 times of PDSCH repetition times in step S102.

[0127] Thus, the PDSCH repetition times can be determined according to the TCI field in the DCI. Specifically, for each configured PDSCH repetition times of a TCI state, the terminal determines the PDSCH repetition times of this PDSCH scheduling according to the TCI field in the DCI.

[0128] In a variant, the PDSCH repetition times determined according to the mapping relationship configured by the sixth information and the TCI state indicated by the first information can be denoted as the sixth target times, and the terminal can jointly determine the PDSCH repetition times based on the sixth target times and the second target times. In this variant, the terminal receives the sixth information sent by the high-layer signaling to obtain the mapping relationship between the TCI state and the PDSCH repetition times, and also receives the DCI scheduling the PDSCH to obtain the time-domain resource allocation field and the TCI state of this PDSCH scheduling.

[0129] In a variant, the PDSCH repetition times can be jointly determined according to the sixth target times and the third target times. In this variant, the terminal receives the sixth information sent by the high-layer signaling to obtain the mapping relationship between the TCI state and the PDSCH repetition times, receives the third information sent by the RRC signaling to obtain the time-domain resource allocation table 1, and also receives the DCI scheduling the PDSCH to obtain the time-domain resource allocation field and the TCI state of this PDSCH scheduling.

[0130] Figure 3 It is a schematic structural diagram of a data transmission device 3 according to an embodiment of the present application. Those skilled in the art understand that the data transmission device 3 described in this embodiment can be used to implement the above Figure 2The method technical solution described in the above embodiment.

[0131] Specifically, referring to Figure 3 , the data transmission device 3 described in this embodiment may include: a first receiving module 31, configured to receive first information, where the first information is used to indicate the number of repetitions of a physical downlink shared channel PDSCH; a second receiving module 32, configured to receive data transmitted by the PDSCH according to the number of repetitions of the PDSCH; where the first information includes at least one of the following: a PDSCH repetition number indication field, an uplink data scheduling delay, the number of repetitions of a physical downlink control channel PDCCH, and a transmission configuration indication field.

[0132] For more content about the working principle and working mode of the data transmission device 3, reference may be made to the relevant description in the above Figure 2 , which will not be elaborated here.

[0133] In a specific implementation, the above data transmission device 3 may correspond to a chip with a data transmission function in a terminal, or correspond to a chip with a data processing function, such as a System-On-a-Chip (SOC for short), a baseband chip, etc.; or correspond to a chip module including a chip with a data transmission function in a terminal; or correspond to a chip module with a data processing function chip, or correspond to a terminal.

[0134] Figure 4 FIG. is a schematic structural diagram of another data transmission device 4 according to an embodiment of the present application. Those skilled in the art understand that the data transmission device 4 described in this embodiment may be used to implement the method technical solution described in the above Figure 2 The method technical solution described in the above embodiment.

[0135] Specifically, referring to Figure 4 , the data transmission device 4 described in this embodiment may include: a sending module 41, configured to send first information, where the first information is used to indicate the number of repetitions of a physical downlink shared channel PDSCH; a transmission module 42, configured to transmit data through the PDSCH according to the number of repetitions of the PDSCH; where the first information includes at least one of the following: a PDSCH repetition number indication field, an uplink data scheduling delay, the number of repetitions of a physical downlink control channel PDCCH, and a transmission configuration indication field.

[0136] For more content about the working principle and working mode of the data transmission device 4, reference may be made to the relevant description in the above Figure 2 , which will not be elaborated here.

[0137] In a specific implementation, the above data transmission device 4 may correspond to a chip with a data transmission function in a network device, or correspond to a chip with a data processing function, such as a System-On-a-Chip (SOC for short), a baseband chip, etc.; or correspond to a chip module including a chip with a data transmission function in a network device; or correspond to a chip module with a data processing function chip, or correspond to a network device.

[0138] In a specific implementation, for each device and product described in the above embodiments, each module / unit included therein may be a software module / unit, a hardware module / unit, or may be partially a software module / unit and partially a hardware module / unit.

[0139] For example, for each device and product applied to or integrated into a chip, each module / unit included therein may be implemented in a hardware manner such as a circuit, or at least some of the module / units may be implemented in a software program manner, and the software program runs on a processor integrated inside the chip, and the remaining (if any) part of the module / units may be implemented in a hardware manner such as a circuit; for each device and product applied to or integrated into a chip module, each module / unit included therein may be implemented in a hardware manner such as a circuit, and different module / units may be located in the same component (such as a chip, a circuit module, etc.) or different components of the chip module, or at least some of the module / units may be implemented in a software program manner, and the software program runs on a processor integrated inside the chip module, and the remaining (if any) part of the module / units may be implemented in a hardware manner such as a circuit; for each device and product applied to or integrated into a terminal, each module / unit included therein may be implemented in a hardware manner such as a circuit, and different module / units may be located in the same component (such as a chip, a circuit module, etc.) or different components inside the terminal, or at least some of the module / units may be implemented in a software program manner, and the software program runs on a processor integrated inside the terminal, and the remaining (if any) part of the module / units may be implemented in a hardware manner such as a circuit.

[0140] An embodiment of the present invention further provides a computer-readable storage medium. The computer-readable storage medium is a non-volatile storage medium or a non-transitory storage medium, on which a computer program is stored. When the computer program is run by a processor, it executes the steps of the data transmission method provided in any of the above embodiments. Preferably, the storage medium may include computer-readable storage media such as non-volatile memory or non-transitory memory. The storage medium may include ROM, RAM, a magnetic disk, or an optical disc, etc.

[0141] An embodiment of the present invention further provides another data transmission device, including a memory and a processor. A computer program that can run on the processor is stored on the memory. When the processor runs the computer program, it executes the steps of the data transmission method provided in the above Figure 2 corresponding embodiment. The data transmission device may be integrated into a terminal / network device, or, for example, the data transmission device may be a terminal / network device.

[0142] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention should be subject to the scope defined by the claims.

Claims

1. A data transmission method, characterized in that, it includes: receiving first information, wherein the first information is used to indicate the repetition times of the Physical Downlink Shared Channel (PDSCH); receiving the data transmitted by the PDSCH according to the repetition times of the PDSCH; wherein the first information includes at least one of the following: PDSCH repetition times indication field, uplink data scheduling delay, Physical Downlink Control Channel (PDCCH) repetition times, and Transmission Configuration Indication (TCI) field.

2. The method according to claim 1, characterized in that, it further includes: receiving second information, wherein the second information includes a time domain resource allocation field.

3. The method according to claim 2, characterized in that, the repetition times of the PDSCH is the larger value or the sum of the first target times and the second target times, wherein the first target times is indicated by the PDSCH repetition times indication field, and the second target times is indicated by the time domain resource allocation field.

4. The method according to claim 2, characterized in that, it further includes: receiving third information, wherein the third information includes at least one time domain resource allocation index and at least one PDSCH repetition times candidate value associated with each time domain resource allocation index.

5. The method according to claim 4, characterized in that, the repetition times of the PDSCH is determined from at least one PDSCH repetition times candidate value according to the PDSCH repetition times indication field, and the at least one PDSCH repetition times candidate value is associated with the time domain resource allocation index indicated by the time domain resource allocation field.

6. The method according to claim 4 or 5, characterized in that, the third information is carried by high layer signaling.

7. The method according to any one of claims 2 to 6, characterized in that, the first information and / or the second information is carried by Downlink Control Information (DCI).

8. The method according to claim 1, characterized in that, it further includes: receiving fourth information, wherein the fourth information includes at least one uplink data scheduling delay interval and the PDSCH repetition times candidate value corresponding to each uplink data scheduling delay interval.

9. The method according to claim 8, characterized in that, the repetition times of the PDSCH is the PDSCH repetition times candidate value corresponding to the uplink data scheduling delay interval to which the uplink data scheduling delay indicated by the first information belongs.

10. The method according to claim 8 or 9, characterized in that, it further includes: receiving second information, wherein the second information includes a time domain resource allocation field.

11. The method according to claim 10, characterized in that, the repetition times of the PDSCH is the larger value or the sum of the third target times and the second target times, wherein the second target times is indicated by the time domain resource allocation field, and the third target times is the PDSCH repetition times candidate value corresponding to the uplink data scheduling delay interval to which the uplink data scheduling delay indicated by the first information belongs.

12. The method according to any one of claims 8 to 11, characterized in that, The first information is carried by a Media Access Control layer control element (MAC CE) or system information.

13. The method according to claim 1, wherein, it further comprises: receiving fifth information, where the fifth information is used to indicate the association relationship between the PDCCH repetition times and the PDSCH repetition times.

14. The method according to claim 13, wherein, the association relationship between the PDCCH repetition times and the PDSCH repetition times includes the proportionality coefficient between the PDCCH repetition times and the PDSCH repetition times.

15. The method according to claim 13, wherein, the first information is carried by high-layer signaling.

16. The method according to claim 1, wherein, it further comprises: receiving sixth information, where the sixth information includes at least one transmission configuration indication state and the PDSCH repetition times corresponding to each of the transmission configuration indication states, and the transmission configuration indication field is used to indicate the transmission configuration indication state.

17. The method according to claim 16, wherein, the sixth information is carried by high-layer signaling, and / or the first information is carried by downlink control information.

18. A data transmission method, wherein, it comprises: transmitting first information, where the first information is used to indicate the Physical Downlink Shared Channel (PDSCH) repetition times; transmitting data through the PDSCH according to the PDSCH repetition times; wherein the first information includes at least one of the following: a PDSCH repetition times indication field, uplink data scheduling delay, Physical Downlink Control Channel (PDCCH) repetition times, and a transmission configuration indication field.

19. The method according to claim 18, wherein, it further comprises: transmitting second information, where the second information includes a time domain resource allocation field.

20. The method according to claim 19, wherein, the PDSCH repetition times is the larger value or the sum of a first target number and a second target number, where the first target number is indicated by the PDSCH repetition times indication field, and the second target number is indicated by the time domain resource allocation field.

21. The method according to claim 19, wherein, it further comprises: transmitting third information, where the third information includes at least one time domain resource allocation index and at least one PDSCH repetition times candidate value associated with each of the time domain resource allocation indexes.

22. The method according to claim 21, wherein, the PDSCH repetition times is determined from at least one PDSCH repetition times candidate value according to the PDSCH repetition times indication field, and the at least one PDSCH repetition times candidate value is associated with the time domain resource allocation index indicated by the time domain resource allocation field.

23. The method according to claim 18, wherein, it further comprises: Send a fourth piece of information, where the fourth piece of information includes at least one uplink data scheduling delay interval and a candidate value of the PDSCH repetition times corresponding to each of the uplink data scheduling delay intervals.

24. The method according to claim 23, wherein, the PDSCH repetition times is the candidate value of the PDSCH repetition times corresponding to the uplink data scheduling delay interval to which the uplink data scheduling delay indicated by the first piece of information belongs; and / or, the PDSCH repetition times is the larger value or the sum of the third target times and the second target times, where the second target times is indicated by a time domain resource allocation field, the third target times is the candidate value of the PDSCH repetition times corresponding to the uplink data scheduling delay interval to which the uplink data scheduling delay indicated by the first piece of information belongs, and the time domain resource allocation field is obtained from the second piece of information.

25. The method according to claim 18, wherein, further includes: sending a fifth piece of information, where the fifth piece of information is used to indicate the association relationship between the PDCCH repetition times and the PDSCH repetition times.

26. The method according to claim 18, wherein, further includes: sending a sixth piece of information, where the sixth piece of information includes at least one transmission configuration indication state and the PDSCH repetition times corresponding to each of the transmission configuration indication states, and the transmission configuration indication field is used to indicate the transmission configuration indication state.

27. A data transmission device, wherein, includes: a first receiving module, configured to receive a first piece of information, where the first piece of information is used to indicate the physical downlink shared channel PDSCH repetition times; a second receiving module, configured to receive data transmitted by the PDSCH according to the PDSCH repetition times; wherein the first piece of information includes at least one of the following: a PDSCH repetition times indication field, an uplink data scheduling delay, a physical downlink control channel PDCCH repetition times, and a transmission configuration indication field.

28. A data transmission device, wherein, includes: a sending module, configured to send a first piece of information, where the first piece of information is used to indicate the physical downlink shared channel PDSCH repetition times; a transmission module, configured to transmit data through the PDSCH according to the PDSCH repetition times; wherein the first piece of information includes at least one of the following: a PDSCH repetition times indication field, an uplink data scheduling delay, a physical downlink control channel PDCCH repetition times, and a transmission configuration indication field.

29. A computer-readable storage medium, the computer-readable storage medium being a non-volatile storage medium or a non-transitory storage medium, on which a computer program is stored, wherein, when the computer program is run by a processor, it executes the steps of the method according to any one of claims 1 to 26.

30. A data transmission device includes a memory and a processor, and a computer program that can run on the processor is stored on the memory, wherein, when the processor runs the computer program, it executes the steps of the method according to any one of claims 1 to 26.

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