Data repeated transmission method and device, storage medium, terminal, and base station

Abstract

A data retransmission method and apparatus, storage medium, terminal, and base station, the method comprising: determining the number of retransmissions for data transmission based on retransmission count information statically or semi-statically configured by the network; and using the determined number of retransmissions to transmit data with the network. Thus, after the UE enters a connected state, the network side does not need to dynamically indicate the number of retransmissions for data transmission in real time, thereby saving control signaling overhead and improving transmission efficiency.

Description

Technical Field

[0001] The present invention relates to the field of communication technology, and in particular to a data repeated transmission method and device, a storage medium, a terminal, and a base station. Background Art

[0002] like Figure 1 As shown, Figure 1 This is a schematic diagram of signal reception corresponding to different geographical locations within the coverage area of ​​a cell / beam in the prior art, where (a) is a terrestrial network scenario and (b) is a satellite communication scenario. Figure 1 In (a), the signal strength received by the UE close to the gNB (i.e., Near-UE) and the UE far from the gNB (Far-UE) is quite different. The signal strengths received by each are as follows: Figure 1 Points a1 and a2 in (a). That is, within the coverage area of ​​a cell, different geographical locations have relatively large differences in distance from the base station (correspondingly, large differences in signal quality). Therefore, when a UE receives / sends data at different geographical locations (such as the cell center or the cell edge), the number of repeated transmissions required for data transmission (i.e., the number of repeated transmissions of the physical downlink shared channel (PDSCH), physical uplink shared channel (PUSCH), physical random access channel (PRACH), and physical downlink control channel (PDCCH)) is different. In current communication systems, PDSCH or PUSCH is scheduled by downlink control information (DCI). There is a specific bit field in DCI that is used to dynamically indicate the number of repeated transmissions of PDSCH or PUSCH.

[0003] In the Non-Terrestrial Networks (NTN) scenario, generally referring to the satellite communication scenario, see Figure 1(b) Since the distance between the satellite and the ground is very large, the distance between medium and low-orbit satellites and the ground is generally 300km to 25,000km, and the distance between the geostationary satellite and the ground is 35,786km. The distance between different geographical locations and the satellite within the coverage of each cell or beam is relatively small (that is, the difference in signal path loss corresponding to different geographical locations within the coverage of the cell or beam is relatively small). As a result, the difference in signal strength received by UEs corresponding to different geographical locations (Far-UE and Near-UE) within the coverage of the cell or beam (including UE downlink reception and base station uplink reception) is very small. The signal strength received by each of them is as follows: Figure 1 Points b1 and b2 in (b) At this point, the network does not need to dynamically indicate the number of repetitions of data transmission (such as PDSCH or PUSCH) to the UE in real time.

[0004] Therefore, a data retransmission method is urgently needed. After the UE enters the connected state, the UE can determine the number of retransmissions for data reception or (" / ") transmission without the network dynamically indicating the number of retransmissions for data transmission. Summary of the Invention

[0005] The technical problem solved by the present invention is how, after the UE enters the connected state, the UE can determine the number of repeated transmissions of data reception / transmission without the network dynamically indicating the number of repeated transmissions of data transmission.

[0006] To solve the above technical problems, an embodiment of the present invention provides a data retransmission method, which includes: determining the number of retransmissions for data transmission based on the retransmission number information statically / semi-statically configured by the network; and using the determined number of retransmissions to transmit data with the network.

[0007] Optionally, before determining the number of repeated transmissions of data transmission based on the repeated transmission number information statically / semi-statically configured by the network, the method further includes: receiving a first system message or a first RRC signaling, wherein the first system message or the first RRC signaling carries the repeated transmission number information.

[0008] Optionally, before determining the number of repeated transmissions of data transmission according to the repeated transmission number information statically / semi-statically configured by the network, the method further includes: receiving message 4 during a random access process, where the message 4 carries the repeated transmission number information.

[0009] Optionally, the number of repeated transmissions of data transmission includes one or more of the number of repeated transmissions of PDSCH, the number of repeated transmissions of PUSCH, and the number of repeated transmissions of PRACH.

[0010] Optionally, the number of repeated transmissions of the data transmission is the number of repeated transmissions of the PUSCH in the connected state, and the number of repeated transmissions of the PUSCH in the connected state is determined according to the number of repeated transmissions of message 3 in the random access process.

[0011] Optionally, the number of repeated transmissions of the data transmission is the number of repeated transmissions of PDSCH in a connected state, and the number of repeated transmissions of PDSCH in the connected state is determined according to the number of repeated transmissions of a random access response message in a random access process.

[0012] Optionally, the method determines the number of repeated transmissions of data transmission based on the repeated transmission number information of the network statically / semi-statically configured, including: determining the number of repeated transmissions of PDSCH / PUSCH / PRACH based on the maximum number of repeated transmissions of PDCCH, wherein there is a mapping relationship between the number of repeated transmissions of PDSCH / PUSCH / PRACH and the maximum number of repeated transmissions of PDCCH.

[0013] Optionally, before determining the number of repeated transmissions of PDSCH / PUSCH / PRACH according to the maximum number of repeated transmissions of PDCCH, the method further includes: receiving a second system message or a second RRC signaling, where the second system message or the second RRC signaling carries the mapping relationship.

[0014] Optionally, the maximum number of repeated transmissions of the PDCCH is carried by a third system message or a third RRC signaling.

[0015] Optionally, the method further includes: when transmitting the PUSCH, using the DCI that schedules the PUSCH to indicate TA adjustment information.

[0016] An embodiment of the present invention also provides a data retransmission method, which includes: statically / semi-statically configuring retransmission number information for the UE, so that the UE determines the retransmission number of data transmission based on the retransmission number information, and uses the determined retransmission number to transmit data with the network.

[0017] Optionally, the static / semi-static configuration of the number of repeated transmissions information for the UE includes: sending a first system message; or sending a first RRC signaling to the UE; wherein the first system message or the first RRC signaling carries the number of repeated transmissions information.

[0018] Optionally, the static / semi-static configuration of the number of repeated transmissions information for the UE includes: sending a message 4 to the UE during the process of the UE performing random access, where the message 4 carries the number of repeated transmissions information.

[0019] Optionally, the number of repeated transmissions of data transmission includes one or more of the number of repeated transmissions of PDSCH, the number of repeated transmissions of PUSCH, and the number of repeated transmissions of PRACH.

[0020] Optionally, the number of repeated transmissions of the data transmission is the number of repeated transmissions of the PUSCH in the connected state, and the number of repeated transmissions of the PUSCH in the connected state is determined according to the number of repeated transmissions of message 3 in the random access process.

[0021] Optionally, the number of repeated transmissions of the data transmission is the number of repeated transmissions of PDSCH in a connected state, and the number of repeated transmissions of PDSCH in the connected state is determined according to the number of repeated transmissions of a random access response message in a random access process.

[0022] Optionally, the static / semi-static configuration of the number of repetition transmissions for the UE includes: configuring the maximum number of repetition transmissions of the PDCCH for the UE, so that the UE determines the number of repetition transmissions of the PDSCH / PUSCH / PRACH based on the maximum number of repetition transmissions of the PDCCH, wherein there is a mapping relationship between the maximum number of repetition transmissions of the PDSCH / PUSCH / PRACH and the number of repetition transmissions of the PDCCH.

[0023] Optionally, the method further includes: sending a second system message; or, sending a second RRC signaling to the UE; wherein the second system message or the second RRC signaling carries the mapping relationship.

[0024] Optionally, configuring the maximum number of repeated transmissions of the PDCCH for the UE includes: sending a third system message; or sending a third RRC signaling to the UE; wherein the third system message or the third RRC signaling carries the maximum number of repeated transmissions of the PDCCH.

[0025] Optionally, the method further includes: sending DCI to the UE, where the DCI is used to schedule PUSCH; and the DCI indicates TA adjustment information.

[0026] An embodiment of the present invention also provides a data retransmission device, which includes: a determination module for determining the number of retransmissions for data transmission based on the retransmission number information statically / semi-statically configured by the network; and a data transmission module for using the determined number of retransmissions to transmit data with the network.

[0027] An embodiment of the present invention also provides a data retransmission device, which includes: a configuration module for statically / semi-statically configuring retransmission number information for a UE, so that the UE determines the retransmission number of data transmission based on the retransmission number information, and uses the determined retransmission number to transmit data with the network.

[0028] An embodiment of the present invention further provides a storage medium storing a computer program, which executes the steps of the above method when executed by a processor.

[0029] An embodiment of the present invention further provides a terminal, comprising a memory and a processor, wherein the memory stores a computer program executable on the processor, and the processor executes the steps of any one of the methods when executing the computer program.

[0030] An embodiment of the present invention further provides a base station, comprising a memory and a processor, wherein the memory stores a computer program that can be run on the processor, and the processor executes the steps of any one of the methods when running the computer program.

[0031] Compared with the prior art, the technical solution of the embodiment of the present invention has the following beneficial effects:

[0032] An embodiment of the present invention provides a data retransmission method, comprising: determining a retransmission count for data transmission based on retransmission count information statically / semi-statically configured by the network; and performing data transmission with the network using the determined retransmission count. Compared to existing technologies, the solution of this embodiment of the present invention enables, after entering a connected state, a UE to determine the retransmission count for data reception / transmission corresponding to different cells / beams based on information statically / semi-statically indicated by the network, and then perform data transmission with the network. This eliminates the need for real-time dynamic instructions from the network, saving control signaling overhead and improving transmission efficiency.

[0033] Furthermore, the number of repeated transmissions information can be statically / semi-statically configured by system messages or RRC signaling. When the number of repeated transmissions of PUSCH / PDSCH is statically / semi-statically configured by the first system message or the first RRC signaling, the network does not need to dynamically indicate the number of repeated transmissions of PUSCH / PDSCH by scheduling DCI, thereby reducing the number of bits of DCI and improving the robustness of PDCCH reception. Alternatively, the number of bits originally used to indicate the number of repeated transmissions of PUSCH / PDSCH in the DCI can be used to indicate other information. When the number of repeated transmissions of PRACH is statically / semi-statically configured by the first system message or the first RRC signaling, the processing efficiency of random access can be effectively improved.

[0034] Furthermore, the network implicitly configures the number of repetitions of PUSCH / PRACH by configuring the maximum number of repetitions of PDCCH, thereby implementing static / semi-static configuration of the number of repetitions of UE.

[0035] Furthermore, each time a PUSCH transmission is performed, the DCI for scheduling the PUSCH may be used to indicate TA adjustment information, so as to dynamically adjust the TA to adapt to the NTN scenario. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 A schematic diagram of signal reception corresponding to different geographical locations within a cell / beam coverage area in the prior art;

[0037] Figure 2 This is a schematic diagram of cells and beams in an NTN scenario in the prior art;

[0038] Figure 3 1 is a flow chart of a data retransmission method according to an embodiment of the present invention;

[0039] Figure 4 1 is a flow chart of another data retransmission method according to an embodiment of the present invention;

[0040] Figure 5 It is a structural diagram of a data retransmission device according to an embodiment of the present invention;

[0041] Figure 6 It is a structural diagram of another data retransmission device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0042] In the prior art, Figure 2 As shown, Figure 2 This diagram illustrates cells and beams in a conventional NTN scenario. A feeder link connects the satellite / unmanned aerial system (UAS) platform to a gateway, which is then connected to a data network. The satellite / UAS platform transmits beams to the ground, forming a beam footprint. Each elliptical area corresponds to a beam footprint. UEs within the beam footprint can communicate data with the satellite / UAS system via a service link.

[0043] In NTN, a cell can correspond to multiple beams or one beam. In actual deployment, the coverage area of ​​one beam can correspond to one cell, or the coverage area of ​​multiple beams can correspond to one cell.

[0044] To ensure coverage, Narrow Band Internet of Things (NB-IoT) / Enhanced Machine Type Communication (eMTC) uses repeated transmission technology. The maximum number of repeated transmissions for downlink transmissions is defined as 2048, and the maximum number of repeated transmissions for uplink transmissions is defined as 128. The actual number of repeated transmissions for PDSCH / PUSCH is dynamically indicated by its corresponding scheduling DCI using a specific bit field. The UE can determine the number of repeated transmissions for PDSCH / PUSCH based on the DCI. The maximum number of repeated transmissions for PDCCH (i.e., Rmax) is semi-statically configured by the Radio Resource Control (RRC) / System Information Block (SIB).

[0045] The random access (RA) process of NB-IOT consists of four steps corresponding to the transmission of message 1 (Msg1), message 2 (Msg2), message 3 (Msg3) and message 4 (Msg4).

[0046] The step corresponding to Msg1 is that the UE sends a preamble. Currently, the maximum number of retransmissions of Msg1 is 128. Before sending Msg1, the UE will obtain the current cell signal through the narrowband reference signal (NRS) (the cell signal can be represented by the quality reference signal received power (RSRP)). The UE compares the measured current cell signal (RSRP value) with the relevant threshold value configured by the network to determine the current coverage level (CE Level). Different CE Levels correspond to different numbers of Msg1 retransmissions. The UE can determine the number of retransmissions of Msg1 based on the determined CE Level. If the first transmission of Msg1 fails, the terminal will upgrade the CE Level (i.e., increase the number of retransmissions of Msg1) and try again until it successfully receives Msg2 or tries all the Msg1 retransmissions (or PRACH resources) corresponding to the CE Level.

[0047] When the base station receives Msg1, it will instruct the UE to send the resources and related parameters of Msg3 (including subcarrier indication, number of Msg3 repetitions, modulation and coding scheme (MCS) indication, etc.) through Msg2-Random Access Response message (RAR). Among them, the RAR of Msg2 is scheduled by DCI. When the UE receives Msg2, it first receives DCI (the DCI is scrambled by RA-RNTI, and the DCI indicates the transmission parameters of Msg2-RAR (including reception resource location, subcarrier indication, number of Msg3 repetitions, MCS indication, etc.)), and then receives Msg2-RAR based on the DCI.

[0048] The UE sends Msg3 according to the relevant scheduling information of Msg3 indicated by Msg2-RAR. After sending Msg3, the UE uses the unique identifier carried in Msg3 to monitor PDCCH. After successfully decoding PDCCH, it receives the corresponding Msg4 content according to the DCI information carried by PDCCH. Msg4 is scheduled by DCI.

[0049] As described in the background technology, in the prior art, after the UE enters the connected state, the network dynamically indicates the number of repeated transmissions of data transmission (such as PDSCH / PUSCH) to the UE in real time, such as indicating the number of repeated transmissions of PDSCH / PUSCH through DCI.

[0050] To solve the above problems, an embodiment of the present invention provides a data retransmission method and device, a storage medium, a terminal, and a base station, wherein the data retransmission method includes: determining the number of retransmissions for data transmission based on the retransmission number information statically / semi-statically configured by the network; and using the determined number of retransmissions to transmit data with the network.

[0051] Therefore, after the UE enters the connected state, the UE can determine the number of repetitions for receiving / sending data without the network dynamically indicating the number of repetitions for data transmission.

[0052] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0053] See Figure 3 , Figure 3 This is a flow chart of a data retransmission method according to an embodiment of the present invention. The data retransmission method may be performed by a terminal side (or UE side), and the method includes:

[0054] Step S301, determining the number of repetitions of data transmission according to the repetition number information of the static / semi-static configuration of the network;

[0055] Step S302: Perform data transmission with the network using the determined number of repeated transmissions.

[0056] In the prior art, when a UE transmits data with a network, PDSCH / PUSCH is scheduled by DCI, and the number of repeated transmissions of PDSCH / PUSCH is dynamically indicated by the scheduled DCI. That is, before each transmission of PDSCH / PUSCH, the number of repeated transmissions of PDSCH / PUSCH needs to be dynamically configured.

[0057] In the embodiment of the present invention, the network statically / semi-statically configures the number of repeated transmissions for the UE, which corresponds to the dynamic configuration. The static / semi-static configuration means that the UE can use the number of repeated transmissions information configured by the network multiple times to transmit data with the network, rather than being configured by the network before each data transmission (for example, PDSCH / PUSCH). That is, after the network configures the number of repeated transmissions information once, the UE can use the number of repeated transmissions information in multiple transmissions.

[0058] Optional, Figure 3 The method shown is used for NTN scenario (see Figure 1 In scenario (b), the distances between different geographical locations and the satellite within the coverage area of ​​each cell / beam are relatively small, so there is no need to dynamically indicate the number of PDSCH / PUSCH retransmissions through downlink control information. The number of bits in the existing DCI used to schedule PDSCH / PUSCH can be reduced, and the reduced DCI bit length can improve the robustness of downlink control information reception. However, due to the long propagation distance between the satellite and the terminal, the UE still needs to repeat transmission when receiving / sending data, and the number of retransmissions required for different cells / beams is also different. Therefore, the number of PDSCH / PUSCH retransmissions can be statically / semi-statically indicated by the network.

[0059] pass Figure 3 With this data retransmission method, after entering the connected state, the UE uses static / semi-static instructions from the network to determine the number of retransmissions for data reception / send corresponding to different cells / beams, and then transmits data to the network. This eliminates the need for real-time dynamic instructions from the network, saving control signaling overhead and improving transmission efficiency.

[0060] Optionally, the number of repeated transmissions of the data transmission includes one or more of the number of repeated transmissions of PDSCH, the number of repeated transmissions of PUSCH, and the number of repeated transmissions of PRACH.

[0061] That is, the network side may configure the number of repeated transmissions of at least one transmission channel among PDSCH, PUSCH or PRACH for the UE.

[0062] In one embodiment, see Figure 3 Before determining the number of repeated transmissions of data transmission according to the repeated transmission number information statically / semi-statically configured by the network in step S301, the method may further include: receiving a first system message or a first RRC signaling, wherein the first system message or the first RRC signaling carries the repeated transmission number information.

[0063] Optionally, the system message is divided into a Master Information Block (MIB) and multiple System Information Blocks (SIBs). The retransmission count information can be carried by the MIB or SIB and broadcast to each connected UE. That is, UEs connected to the same cell receive and use the same retransmission count information. In this case, the SIB / MIB carrying the retransmission count information is recorded as the first system message.

[0064] Furthermore, the first system message may indicate the number of repeated transmissions corresponding to the current cell and the number of repeated transmissions for the coverage areas corresponding to each beam / beam group of the current cell. That is, the system message may indicate the corresponding number of repeated transmissions based on the granularity of the cell / beam / beam group.

[0065] Optionally, the information on the number of repeated transmissions may also be carried in the RRC signaling sent by the network to the UE, which is recorded as the first RRC signaling.

[0066] The UE receives a first system message (MIB / SIB) or a first RRC signaling to determine the number of repeated transmissions for the coverage area corresponding to the current cell, the current beam, or the current beam group as the determined number of repeated transmissions.

[0067] When the number of PUSCH / PDSCH retransmissions is statically / semi-statically configured by the first system message or the first RRC signaling, the network does not need to dynamically indicate the number of PUSCH / PDSCH retransmissions through the scheduling DCI, thereby reducing the number of DCI bits and improving the robustness of PDCCH reception. Alternatively, the number of bits originally used to indicate the number of PUSCH / PDSCH retransmissions in the DCI can be used to indicate other information.

[0068] Optionally, the network side may also use the first system message or the first RRC signaling to send the number of repeated transmissions of the PRACH to the UE.

[0069] During the UE's random access process, the UE directly transmits Message 1 (Msg1) based on the number of PRACH retransmissions indicated by the first system message (MIB / SIB) or the first RRC signaling. At this time, the number of PRACH retransmissions is directly configured by the first system message or the first RRC signaling, and the UE does not need to determine it based on the coverage level (CE Level). If the current round of Msg1 transmission is unsuccessful, the UE does not need to attempt other retransmissions (such as the number of Msg1 retransmissions for other CE Levels) or use PRACH resources, which can effectively improve the processing efficiency of random access.

[0070] In one embodiment, see Figure 3 Before determining the number of repeated transmissions of data transmission according to the repeated transmission number information of the network statically / semi-statically configured in step S301, the method further includes: receiving message 4 during the random access process, wherein the message 4 carries the repeated transmission number information.

[0071] Before entering the connected state, the UE needs to perform a random access procedure. The network uses Message 4 (Msg4) to carry the number of retransmissions after a successful random access. The UE determines the number of subsequent PDSCH / PUSCH / PRACH retransmissions (i.e., after entering the connected state) by receiving Msg4.

[0072] Optionally, Msg4 carries a dedicated Media Access Control Channel Element (MAC CE) for indicating the number of repetition transmissions of subsequent PDSCH / PUSCH / PRACH.

[0073] In one embodiment, the number of repeated transmissions of the data transmission is the number of repeated transmissions of the PUSCH in the connected state, and the number of repeated transmissions of the PUSCH in the connected state is determined according to the number of repeated transmissions of the message 3 in the random access process.

[0074] Optionally, the number of repeated transmissions of the data transmission is the number of repeated transmissions of PDSCH in a connected state, and the number of repeated transmissions of PDSCH in a connected state is determined according to the number of repeated transmissions of a random access response (RAR) message in a random access process.

[0075] Before entering the connected state, the UE must perform a random access procedure. For PUSCH transmissions, the number of PUSCH retransmissions in the connected state after the UE completes random access is fixed based on the number of retransmissions of Message 3 (Msg3) indicated by the RAR message. For example, the number of PUSCH retransmissions in the connected state may be twice or half the number of retransmissions of Msg3, or the number of PUSCH retransmissions in the connected state may be equal to the number of retransmissions of Msg3.

[0076] For PDSCH transmission, the number of PDSCH retransmissions in the connected state after the UE receives Msg2 is determined based on the number of RAR message retransmissions. For example, the number of PDSCH retransmissions in the connected state is twice or half the number of RAR message retransmissions, or the number of PDSCH retransmissions in the connected state is equal to the number of RAR message retransmissions.

[0077] As a result, the network no longer needs to dynamically indicate the number of PUSCH / PDSCH retransmissions through scheduling DCI, which can reduce the number of DCI bits and improve the robustness of PDCCH reception. Alternatively, the number of bits in the DCI originally used to indicate the number of PUSCH / PDSCH retransmissions can be used to indicate other information.

[0078] In one embodiment, see Figure 3 In step S301, the number of repeated transmissions of data transmission is determined according to the repeated transmission number information of the network statically / semi-statically configured, including: determining the repeated transmission number of PDSCH / PUSCH / PRACH according to the maximum repeated transmission number of PDCCH, wherein there is a mapping relationship between the repeated transmission number of PDSCH / PUSCH / PRACH and the maximum repeated transmission number of PDCCH.

[0079] Optionally, before determining the number of repeated transmissions of PDSCH / PUSCH / PRACH according to the maximum number of repeated transmissions of PDCCH, the method further includes: receiving a second system message or a second RRC signaling, where the second system message or the second RRC signaling carries the mapping relationship.

[0080] Optionally, the maximum number of repeated transmissions of the PDCCH is carried by a third system message or a third RRC signaling.

[0081] The network may configure the maximum number of repeated transmissions of the PDCCH, ie, Rmax, through RRC signaling (ie, the third RRC signaling) / system message (ie, the third system message, mainly SIB message).

[0082] For PDSCH transmission, the UE determines the number of PDSCH repetitions based on the Rmax value configured by the network. Specifically, a relationship is predefined between Rmax and the number of PDSCH repetitions. For example, if Rmax = 4, the number of PDSCH repetitions is 2; if Rmax = 8, the number of PDSCH repetitions is 4.

[0083] Optionally, the correspondence between Rmax and the number of PDSCH repetition transmissions may be sent to the UE via the second RRC information / second system message, so that the UE determines the number of PDSCH repetition transmissions based on the Rmax configured via the third system message (SIB) or the third RRC message.

[0084] For PUSCH transmissions, the UE determines the number of PDSCH retransmissions based on the Rmax value of the PDCCH configured by the network. Specifically, a predefined relationship is established between Rmax and the number of PUSCH retransmissions. For example, if Rmax = 4, the number of PUSCH retransmissions is 2; if Rmax = 8, the number of PUSCH retransmissions is 4.

[0085] Optionally, the correspondence between Rmax and the number of PUSCH repetition transmissions may be sent to the UE via a second RRC signaling / a second system message, and the UE determines the number of PUSCH repetition transmissions via Rmax indicated by a third RRC signaling or a third system message (SIB).

[0086] For PRACH transmissions, the UE determines the number of PRACH retransmissions based on the network-configured Rmax. Specifically, a predefined relationship exists between Rmax and the number of PRACH retransmissions. For example, if Rmax = 4, the number of PRACH retransmissions is 2; if Rmax = 8, the number of PRACH retransmissions is 4.

[0087] Optionally, the correspondence between Rmax and the number of repeated transmissions of the PRACH may be sent to the UE via the second RRC information / second system message, and the UE determines the number of repeated transmissions of the PRACH via Rmax.

[0088] If the network configures the correspondence between Rmax and PDSCH / PUSCH / PRACH through the second system message and configures Rmax through the third system message (SIB), then each UE accessing the network has a consistent understanding of Rmax and the correspondence between Rmax and the number of repeated transmissions of PDSCH / PUSCH / PRACH. In this case, the number of repeated transmissions of PDSCH / PUSCH / PRACH configured by the network for each UE is based on the granularity of the cell / beam / beam bundle.

[0089] Among them, if the network configures the correspondence between Rmax and PDSCH / PUSCH / PRACH through the second RRC signaling, or configures Rmax through the third system message (SIB), the network can configure a specific number of repeated transmissions of PDSCH / PUSCH / PRACH for a single UE through the second RRC signaling or the third RRC signaling.

[0090] In this embodiment, the network implicitly configures the number of repetitions of PUSCH / PRACH by configuring the maximum number of repetitions of PDCCH, thereby implementing static / semi-static configuration of the repetition number information of the UE.

[0091] In one embodiment, see again Figure 3 The method further includes: when transmitting PUSCH, using the DCI that schedules PUSCH to indicate TA adjustment information.

[0092] When there is no need to indicate the number of repeated transmissions of the PUSCH through the DCI for scheduling the PUSCH, the corresponding bit in the DCI may be used to indicate the information of sending the Timing Advance (TA) adjustment.

[0093] In the NTN scenario, due to the rapid movement of the satellite relative to the UE (asynchronous satellite scenario), the propagation delay between the UE and the satellite will change rapidly over time, which will cause frequent uplink desynchronization. The UE needs to frequently adjust the TA, that is, perform uplink synchronization.

[0094] Through the solution of this embodiment, each time a PUSCH transmission is performed, the DCI for scheduling the PUSCH may be used to indicate TA adjustment information, so as to dynamically adjust the TA to adapt to the NTN scenario.

[0095] See Figure 4 , an embodiment of the present invention further provides a data retransmission method, the method comprising:

[0096] Step S401: statically / semi-statically configure repetition number information for the UE, so that the UE determines the repetition number of data transmission according to the repetition number information, and uses the determined repetition number of data transmission to perform data transmission with the network.

[0097] Optionally, the static / semi-static configuration of the number of repeated transmissions information for the UE includes: sending a first system message; or sending a first RRC signaling to the UE; wherein the first system message or the first RRC signaling carries the number of repeated transmissions information.

[0098] Optionally, the static / semi-static configuration of the number of repeated transmissions information for the UE includes: sending a message 4 to the UE during the process of the UE performing random access, where the message 4 carries the number of repeated transmissions information.

[0099] Optionally, the number of repeated transmissions of data transmission includes one or more of the number of repeated transmissions of PDSCH, the number of repeated transmissions of PUSCH, and the number of repeated transmissions of PRACH.

[0100] Optionally, the number of repeated transmissions of the data transmission is the number of repeated transmissions of the PUSCH in the connected state, and the number of repeated transmissions of the PUSCH in the connected state is determined according to the number of repeated transmissions of message 3 in the random access process.

[0101] Optionally, the number of repeated transmissions of the data transmission is the number of repeated transmissions of PDSCH in a connected state, and the number of repeated transmissions of PDSCH in the connected state is determined according to the number of repeated transmissions of a random access response message in a random access process.

[0102] Optionally, the static / semi-static configuration of the number of repetition transmissions for the UE includes: configuring the maximum number of repetition transmissions of the PDCCH for the UE, so that the UE determines the number of repetition transmissions of the PDSCH / PUSCH / PRACH based on the maximum number of repetition transmissions of the PDCCH, wherein there is a mapping relationship between the maximum number of repetition transmissions of the PDSCH / PUSCH / PRACH and the number of repetition transmissions of the PDCCH.

[0103] Optionally, the method further includes: sending a second system message; or, sending a second RRC signaling to the UE; wherein the second system message or the second RRC signaling carries the mapping relationship.

[0104] Optionally, configuring the maximum number of repeated transmissions of the PDCCH for the UE includes: sending a third system message; or sending a third RRC signaling to the UE; wherein the third system message or the third RRC signaling carries the maximum number of repeated transmissions of the PDCCH.

[0105] Optionally, a DCI is sent to the UE, where the DCI is used to schedule a PUSCH; and the DCI indicates TA adjustment information.

[0106] about Figure 4 For more information on the working principle and working method of the data retransmission method shown, please refer to Figure 3 The relevant description on the network side in the data retransmission method will not be repeated here.

[0107] See Figure 5 , Figure 5 FIG. 5 is a structural diagram of a data retransmission device 50, wherein the data retransmission device 50 comprises:

[0108] Determining module 501, configured to determine the number of repetitions of data transmission according to the repetition number information statically / semi-statically configured by the network;

[0109] The data transmission module 502 is configured to perform data transmission with the network using the determined number of repeated transmissions.

[0110] about Figure 5 For more information on the working principle and working method of the data retransmission device 50, please refer to Figure 3 The relevant description of the data repeated transmission method will not be repeated here.

[0111] See Figure 6 , Figure 6 FIG. 6 is a structural diagram of a data retransmission device 60, wherein the data retransmission device 60 includes:

[0112] The configuration module 601 is used to statically / semi-statically configure the repetition number information for the UE, so that the UE determines the repetition number of data transmission according to the repetition number information, and uses the determined repetition number of data transmission to transmit data with the network.

[0113] about Figure 6 For more information on the working principle and working method of the data retransmission device 60, please refer to Figure 4 The relevant description of the data repeated transmission method will not be repeated here.

[0114] The embodiment of the present invention further provides a storage medium on which a computer program is stored, and the computer program is executed by a processor when it is run. Figure 3 or Figure 4 The storage medium may be a computer-readable storage medium, for example, a non-volatile memory or a non-transitory memory, or an optical disk, a mechanical hard disk, a solid-state drive, etc.

[0115] Specifically, in the embodiment of the present invention, the processor may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field programmable gate arrays (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor, etc.

[0116] It should also be understood that the memory in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of random access memory (RAM) are available, such as static RAM (SRAM), dynamic random access memory (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), and direct rambus RAM (DR RAM).

[0117] An embodiment of the present invention further provides a terminal, comprising a memory and a processor, wherein the memory stores a computer program that can be run on the processor, and the processor executes the computer program when running the computer program. Figure 3The terminal includes but is not limited to a mobile phone, a computer, and a tablet computer.

[0118] The embodiment of the present invention further provides a base station, comprising a memory and a processor, wherein the memory stores a computer program that can be run on the processor, and the processor executes the computer program when running the computer program. Figure 4 The steps of the method.

[0119] It should be understood that the term "and / or" as used herein simply describes an association between related objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " as used herein indicates that the related objects are in an "or" relationship.

[0120] The term "plurality" used in the embodiments of the present application refers to two or more.

[0121] The first, second, etc. descriptions appearing in the embodiments of this application are only for illustration and distinction of the description objects. There is no order, nor does it indicate any special limitation on the number of devices in the embodiments of this application, and cannot constitute any limitation on the embodiments of this application.

[0122] The "connection" appearing in the embodiments of the present application refers to various connection methods such as direct connection or indirect connection to achieve communication between devices, and the embodiments of the present application do not impose any limitations on this.

[0123] 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 scope of protection of the present invention should be based on the scope defined by the claims.

Claims

1. A data retransmission method, characterized in that: The method comprises: Determine the number of repeated transmissions of data transmission according to the repeated transmission number information of the network static / semi-static configuration; Use a determined number of repetitions to transmit data to and from the network; The number of repeated transmissions of the data transmission is the number of repeated transmissions of the PUSCH in the connected state, and the number of repeated transmissions of the PUSCH in the connected state is determined according to the number of repeated transmissions of message 3 in the random access process; Alternatively, the number of repeated transmissions of the data transmission is the number of repeated transmissions of the PDSCH in a connected state, and the number of repeated transmissions of the PDSCH in the connected state is determined according to the number of repeated transmissions of the random access response message in the random access process.

2. The method according to claim 1, characterized in that The method further comprises: When transmitting PUSCH, the DCI that schedules PUSCH is used to indicate TA adjustment information.

3. A data retransmission method, characterized in that: The method comprises: statically / semi-statically configuring retransmission count information for the UE, so that the UE determines the number of retransmission counts for data transmission according to the retransmission count information, and uses the determined number of retransmission counts to perform data transmission with the network; The number of repeated transmissions of the data transmission is the number of repeated transmissions of the PUSCH in the connected state, and the number of repeated transmissions of the PUSCH in the connected state is determined according to the number of repeated transmissions of message 3 in the random access process. Alternatively, the number of repeated transmissions of the data transmission is the number of repeated transmissions of the PDSCH in a connected state, and the number of repeated transmissions of the PDSCH in the connected state is determined according to the number of repeated transmissions of the random access response message in the random access process.

4. The method according to claim 3, further comprising: Sending DCI to the UE, where the DCI is used to schedule a PUSCH; It is characterized in that the DCI indicates TA adjustment information.

5. A data retransmission device, characterized in that: The device comprises: A determination module, configured to determine the number of repeated transmissions of data transmission according to repeated transmission number information of a network static / semi-static configuration; A data transmission module, configured to transmit data to a network using a determined number of repeated transmissions; The number of repeated transmissions of the data transmission is the number of repeated transmissions of the PUSCH in the connected state, and the number of repeated transmissions of the PUSCH in the connected state is determined according to the number of repeated transmissions of message 3 in the random access process; Alternatively, the number of repeated transmissions of the data transmission is the number of repeated transmissions of the PDSCH in a connected state, and the number of repeated transmissions of the PDSCH in the connected state is determined according to the number of repeated transmissions of the random access response message in the random access process.

6. A data retransmission device, characterized in that: The device comprises: a configuration module, configured to statically / semi-statically configure repetition number information for the UE, so that the UE determines the number of repetition transmissions for data transmission according to the repetition number information, and uses the determined number of repetition transmissions to transmit data with the network; The number of repeated transmissions of the data transmission is the number of repeated transmissions of the PUSCH in the connected state, and the number of repeated transmissions of the PUSCH in the connected state is determined according to the number of repeated transmissions of message 3 in the random access process; Alternatively, the number of repeated transmissions of the data transmission is the number of repeated transmissions of the PDSCH in a connected state, and the number of repeated transmissions of the PDSCH in the connected state is determined according to the number of repeated transmissions of the random access response message in the random access process.

7. A storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method according to any one of claims 1 or 2, or the steps of the method according to any one of claims 3 or 4, are executed.

8. A terminal comprising a memory and a processor, wherein the memory stores a computer program that can be run on the processor, characterized in that: When the processor runs the computer program, the steps of the method according to claim 1 or 2 are performed.

9. A base station comprising a memory and a processor, wherein the memory stores a computer program that can be run on the processor, characterized in that: When the processor runs the computer program, the steps of the method according to claim 3 or 4 are performed.

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