Method executed by user terminal or base station, user terminal and base station

Abstract

The present disclosure provides a method performed by a user terminal UE, a method performed by a base station, a user terminal and a base station. The method performed by the user terminal UE includes: receiving information related to whether a hybrid automatic repeat request HARQ feedback function is turned off; based on the information, receiving downlink control information and a shared channel scheduled by the downlink control information.

Description

Technical Field

[0001] The present disclosure relates to the technical field of wireless communications, and more particularly to a method executed by a user terminal UE, a method executed by a base station, a user terminal, and a base station. Background Art

[0002] In order to meet the increased demand for wireless data communication services since the deployment of 4G communication systems, efforts have been made to develop improved 5G or quasi-5G communication systems. Therefore, 5G or quasi-5G communication systems are also referred to as "super 4G networks" or "post-LTE systems."

[0003] 5G communication systems are implemented in higher frequency (millimeter wave, mmWave) bands, such as the 60 GHz band, to achieve higher data rates. In order to reduce the propagation loss of radio waves and increase the transmission distance, beamforming, massive multiple-input multiple-output (MIMO), full-dimensional MIMO (FD-MIMO), array antennas, analog beamforming, and massive antenna technology are discussed in 5G communication systems.

[0004] In addition, in the 5G communication system, development of system network improvements is underway based on advanced small cells, cloud radio access networks (RAN), ultra-dense networks, device-to-device (D2D) communication, wireless backhaul, mobile networks, collaborative communications, coordinated multi-point (CoMP), receiving-end interference cancellation, etc.

[0005] In 5G systems, hybrid FSK and QAM modulation (FQAM) and sliding window superposition coding (SWSC) as advanced coded modulation (ACM), and filter bank multi-carrier (FBMC), non-orthogonal multiple access (NOMA) and sparse code multiple access (SCMA) as advanced access technologies have been developed. Summary of the invention

[0006] Technical issues

[0007] A method performed by a user terminal UE, a method performed by a base station, a user terminal and a base station are needed.

[0008] Technical Solution

[0009] According to one aspect of the present disclosure, a method performed by a user terminal UE is provided, the method comprising: receiving information related to whether a hybrid automatic repeat request HARQ feedback function is turned off; based on the information, receiving downlink control information and a shared channel scheduled by the downlink control information.

[0010] According to one aspect of the present disclosure, a method performed by a base station is provided, the method comprising: sending information related to whether a hybrid automatic repeat request HARQ feedback function is turned off; sending downlink control information and a shared channel scheduled by the downlink control information.

[0011] According to another aspect of the present disclosure, a terminal is provided, comprising: a transceiver configured to send and receive signals to and from the outside; and a processor configured to control the transceiver to execute any one of the above methods executed by the user terminal.

[0012] According to another aspect of the present disclosure, a base station is provided, comprising: a transceiver configured to send and receive signals to and from the outside; and a processor configured to control the transceiver to execute any one of the methods executed by the above-mentioned base station.

[0013] According to another aspect of the present disclosure, a non-transitory computer-readable recording medium is provided, on which a program for executing any of the above methods when executed by a computer is stored.

[0014] Beneficial Effects

[0015] The present disclosure provides a method executed by a user terminal UE, a method executed by a base station, a user terminal and a base station, wherein the user terminal UE receives information related to whether a hybrid automatic repeat request HARQ feedback function is turned off, and based on the information, receives downlink control information and a shared channel scheduled by the downlink control information, thereby improving the reliability of data transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 An example wireless network according to various embodiments of the present disclosure is shown;

[0017] Figure 2a and Figure 2b Example wireless transmit and receive paths according to the present disclosure are shown;

[0018] Figure 3a An example user equipment UE according to the present disclosure is shown;

[0019] Figure 3b An example base station gNB 102 according to the present disclosure is shown;

[0020] Figure 4 A flowchart of a method performed by a user terminal UE according to an embodiment of the present disclosure is shown;

[0021] Figure 5 A partial flow chart of a method performed by a user terminal UE according to an embodiment of the present disclosure is shown;

[0022] Figure 6 A schematic diagram showing the joint use of blind retransmission of PDSCH and PDSCH retransmission based on HARQ feedback;

[0023] Figure 7 A partial flow chart of a method performed by a user terminal UE according to an embodiment of the present disclosure is shown;

[0024] Figure 8 A partial flow chart of a method performed by a user terminal UE according to an embodiment of the present disclosure is shown;

[0025] Fig. 9 A schematic diagram showing cross-distribution of aggregated time slots of three UEs in time according to an embodiment of the present disclosure is shown;

[0026] Fig.10 A schematic diagram showing an interval between each time slot in a plurality of time slots for PDSCH time slot aggregation transmission according to an embodiment of the present disclosure is shown;

[0027] Fig.11 A schematic diagram showing an interval between each time slot cluster in a plurality of time slots for PDSCH time slot aggregation transmission according to an embodiment of the present disclosure;

[0028] Fig.12 A flowchart of a method executed by a base station according to an embodiment of the present disclosure is shown;

[0029] Fig.13 is a block diagram showing the structure of a user terminal according to an embodiment of the present disclosure;

[0030] Fig.14 is a block diagram showing the structure of a base station according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0031] The embodiments of the present disclosure can be applied to non-terrestrial networks (NTN), including but not limited to, for example, NTN using 5G NR (New Radio) as wireless access technology, NTN using LTE (Long Term Evolution) as wireless access technology, NTN using LTE eMTC (LTE enhanced MTO, Internet of Things technology based on LTE evolution) as wireless access technology, and NTN using LTE NB-IOT (Narrow Band Internet of Things) as wireless access technology. With the wide-area coverage capability of satellites, NTN can enable operators to provide 5G commercial services in areas where ground network infrastructure is underdeveloped, achieve 5G business continuity, and play a role in scenarios such as emergency communications, maritime communications, aviation communications, and communications along railways.

[0032] In addition, the embodiments of the present disclosure can also be applied to terrestrial communication networks, including but not limited to, for example, terrestrial communication networks with 5G NR as wireless access technology, terrestrial communication networks with LTE as wireless access technology, terrestrial communication networks with LTE eMTC as wireless access technology, and terrestrial communication networks with LTE NB-IOT as wireless access technology.

[0033] Below Figures 1 to 3b A terrestrial communication network to which the embodiments of the present disclosure can be applied is described as an example.

[0034] Figure 1 An example wireless network 100 is shown in accordance with various embodiments of the present disclosure. Figure 1 The embodiment of the wireless network 100 shown in FIG. 1 is for illustration only. Other embodiments of the wireless network 100 can be used without departing from the scope of the present disclosure.

[0035] Wireless network 100 includes gNodeB (gNB) 101, gNB 102, and gNB 103. gNB 101 communicates with gNB 102 and gNB 103. gNB 101 also communicates with at least one Internet Protocol (IP) network 130, such as the Internet, a private IP network, or other data network.

[0036] Depending on the network type, other well-known terms such as "base station" or "access point" can be used instead of "gNodeB" or "gNB". For convenience, the terms "gNodeB" and "gNB" are used in this patent document to refer to network infrastructure components that provide wireless access to remote terminals. Also, depending on the network type, other well-known terms such as "mobile station", "subscriber station", "remote terminal", "wireless terminal" or "user device" can be used instead of "user equipment" or "UE". For convenience, the terms "user equipment" and "UE" are used in this patent document to refer to a remote wireless device that wirelessly accesses a gNB, whether the UE is a mobile device (such as a mobile phone or smartphone) or a commonly thought of fixed device (such as a desktop computer or vending machine).

[0037] gNB 102 provides wireless broadband access to network 130 for a first plurality of user equipment (UE) within coverage area 120 of gNB 102. The first plurality of UEs include: UE 111, which may be located in a small business (SB); UE 112, which may be located in an enterprise (E); UE 113, which may be located in a WiFi hotspot (HS); UE 114, which may be located in a first residence (R); UE 115, which may be located in a second residence (R); UE 116, which may be a mobile device (M), such as a cellular phone, a wireless laptop, a wireless PDA, etc. gNB 103 provides wireless broadband access to network 130 for a second plurality of UEs within coverage area 125 of gNB 103. The second plurality of UEs include UE 115 and UE 116. In some embodiments, one or more of gNBs 101-103 may be capable of communicating with each other and with UEs 111-116 using 5G, long term evolution (LTE), LTE-A, WiMAX, or other advanced wireless communication technologies.

[0038] The dashed lines illustrate the approximate extents of coverage areas 120 and 125, which are shown as approximately circular for purposes of illustration and explanation only. It should be clearly understood that coverage areas associated with gNBs, such as coverage areas 120 and 125, can have other shapes, including irregular shapes, depending on the configuration of the gNB and variations in the radio environment associated with natural and man-made obstacles.

[0039] As described in more detail below, one or more of gNB 101, gNB 102, and gNB 103 include a 2D antenna array as described in embodiments of the present disclosure. In some embodiments, one or more of gNB 101, gNB 102, and gNB 103 support codebook design and structure for a system with a 2D antenna array.

[0040] although Figure 1 One example of a wireless network 100 is shown, but Figure 1 Various changes may be made. For example, wireless network 100 can include any number of gNBs and any number of UEs in any suitable arrangement. Also, gNB 101 can communicate directly with any number of UEs and provide those UEs with wireless broadband access to network 130. Similarly, each gNB 102-103 can communicate directly with network 130 and provide UEs with direct wireless broadband access to network 130. In addition, gNBs 101, 102, and / or 103 can provide access to other or additional external networks, such as an external telephone network or other type of data network.

[0041] Figure 2a and Figure 2b Example wireless transmit and receive paths according to the present disclosure are shown. In the following description, transmit path 200 can be described as being implemented in a gNB (such as gNB 102) and receive path 250 can be described as being implemented in a UE (such as UE 116). However, it should be understood that receive path 250 can be implemented in a gNB and transmit path 200 can be implemented in a UE. In some embodiments, receive path 250 is configured to support codebook design and structure for a system with a 2D antenna array as described in embodiments of the present disclosure.

[0042] The transmit path 200 includes a channel coding and modulation block 205, a serial to parallel (S to P) block 210, an N-point inverse fast Fourier transform (IFFT) block 215, a parallel to serial (P to S) block 220, an add cyclic prefix block 225, and an upconverter (UC) 230. The receive path 250 includes a downconverter (DC) 255, a remove cyclic prefix block 260, a serial to parallel (S to P) block 265, an N-point fast Fourier transform (FFT) block 270, a parallel to serial (P to S) block 275, and a channel decoding and demodulation block 280.

[0043] In the transmit path 200, the channel coding and modulation block 205 receives a set of information bits, applies coding (such as low-density parity check (LDPC) coding), and modulates the input bits (such as using quadrature phase shift keying (QPSK) or quadrature amplitude modulation (QAM)) to generate a sequence of frequency-domain modulation symbols. The serial-to-parallel (S-to-P) block 210 converts (such as demultiplexes) the serial modulation symbols into parallel data to generate N parallel symbol streams, where N is the number of IFFT / FFT points used in the gNB 102 and the UE 116. The N-point IFFT block 215 performs an IFFT operation on the N parallel symbol streams to generate a time-domain output signal. The parallel-to-serial block 220 converts (such as multiplexes) the parallel time-domain output symbols from the N-point IFFT block 215 to generate a serial time-domain signal. The add cyclic prefix block 225 inserts a cyclic prefix into the time-domain signal. The up-converter 230 modulates (such as up-converts) the output of the add cyclic prefix block 225 to an RF frequency for transmission via a wireless channel. The signal can also be filtered at baseband before conversion to RF frequency.

[0044] The RF signal transmitted from gNB 102 arrives at UE 116 after passing through the wireless channel, and the reverse operation of the operation at gNB 102 is performed at UE 116. Downconverter 255 downconverts the received signal to baseband frequency, and remove cyclic prefix block 260 removes the cyclic prefix to generate a serial time-domain baseband signal. Serial to parallel block 265 converts the time-domain baseband signal into parallel time-domain signals. N-point FFT block 270 performs an FFT algorithm to generate N parallel frequency-domain signals. Parallel to serial block 275 converts the parallel frequency-domain signals into a sequence of modulated data symbols. Channel decoding and demodulation block 280 demodulates and decodes the modulated symbols to recover the original input data stream.

[0045] Each of gNBs 101-103 may implement a transmit path 200 similar to that for transmitting in the downlink to UEs 111-116 and may implement a receive path 250 similar to that for receiving in the uplink from UEs 111-116. Similarly, each of UEs 111-116 may implement a transmit path 200 for transmitting in the uplink to gNBs 101-103 and may implement a receive path 250 for receiving in the downlink from gNBs 101-103.

[0046] Figure 2a and Figure 2b Each of the components in can be implemented using hardware only, or a combination of hardware and software / firmware. As a specific example, Figure 2a and Figure 2bAt least some of the components in can be implemented with software, while other components can be implemented by configurable hardware or a mixture of software and configurable hardware. For example, FFT block 270 and IFFT block 215 can be implemented as a configurable software algorithm, in which the value of the number of points N can be modified according to the implementation.

[0047] In addition, although described as using FFT and IFFT, this is illustrative only and should not be construed as limiting the scope of the present disclosure. Other types of transforms can be used, such as discrete Fourier transform (DFT) and inverse discrete Fourier transform (IDFT) functions. It should be understood that for DFT and IDFT functions, the value of variable N can be any integer (such as 1, 2, 3, 4, etc.), while for FFT and IFFT functions, the value of variable N can be any integer as a power of 2 (such as 1, 2, 4, 8, 16, etc.).

[0048] although Figure 2a and Figure 2b An example of a wireless transmit and receive path is shown, but the Figure 2a and Figure 2b Make various changes. For example, Figure 2a and Figure 2b The various components in can be combined, further subdivided or omitted, and additional components can be added according to specific needs. Figure 2a and Figure 2b It is intended to illustrate examples of the types of transmit and receive paths that can be used in a wireless network. Any other suitable architecture can be used to support wireless communications in a wireless network.

[0049] Figure 3a An example UE 116 according to the present disclosure is shown. Figure 3a The embodiment of UE 116 shown in FIG. 1 is for illustration only, and Figure 1 UEs 111-115 can have the same or similar configurations. However, UEs have a variety of configurations, and Figure 3a The scope of the present disclosure is not limited to any particular implementation of the UE.

[0050] UE 116 includes antenna 305, radio frequency (RF) transceiver 310, transmit (TX) processing circuit 315, microphone 320, and receive (RX) processing circuit 325. UE 116 also includes speaker 330, processor / controller 340, input / output (I / O) interface 345, input device(s) 350, display 355, and memory 360. Memory 360 includes operating system (OS) 361 and one or more applications 362.

[0051] The RF transceiver 310 receives incoming RF signals from the antenna 305 transmitted by the gNB of the wireless network 100. The RF transceiver 310 downconverts the incoming RF signals to generate an intermediate frequency (IF) or baseband signal. The IF or baseband signal is sent to the RX processing circuit 325, where the RX processing circuit 325 generates a processed baseband signal by filtering, decoding and / or digitizing the baseband or IF signal. The RX processing circuit 325 sends the processed baseband signal to the speaker 330 (such as for voice data) or to the processor / controller 340 (such as for web browsing data) for further processing.

[0052] The TX processing circuit 315 receives analog or digital voice data from the microphone 320, or receives other outgoing baseband data (such as network data, email, or interactive video game data) from the processor / controller 340. The TX processing circuit 315 encodes, multiplexes, and / or digitizes the outgoing baseband data to generate a processed baseband or IF signal. The RF transceiver 310 receives the outgoing processed baseband or IF signal from the TX processing circuit 315 and up-converts the baseband or IF signal to an RF signal that is transmitted via the antenna 305.

[0053] The processor / controller 340 can include one or more processors or other processing devices and execute an OS 361 stored in the memory 360 to control the overall operation of the UE 116. For example, the processor / controller 340 can control the reception of forward channel signals and the transmission of reverse channel signals through the RF transceiver 310, the RX processing circuit 325, and the TX processing circuit 315 according to well-known principles. In some embodiments, the processor / controller 340 includes at least one microprocessor or microcontroller.

[0054] The processor / controller 340 is also capable of executing other processes and programs resident in the memory 360, such as operations for channel quality measurement and reporting for a system with a 2D antenna array as described in the embodiments of the present disclosure. The processor / controller 340 is capable of moving data into or out of the memory 360 as needed for the executed process. In some embodiments, the processor / controller 340 is configured to execute applications 362 based on the OS 361 or in response to signals received from the gNB or operator. The processor / controller 340 is also coupled to the I / O interface 345, where the I / O interface 345 provides the UE 116 with the ability to connect to other devices such as laptops and handheld computers. The I / O interface 345 is the communication path between these accessories and the processor / controller 340.

[0055] Processor / controller 340 is also coupled to input device(s) 350 and display 355. An operator of UE 116 can input data into UE 116 using input device(s) 350. Display 355 can be a liquid crystal display or other display capable of presenting text and / or at least limited graphics (such as from a website). Memory 360 is coupled to processor / controller 340. A portion of memory 360 can include random access memory (RAM), while another portion of memory 360 can include flash memory or other read-only memory (ROM).

[0056] although Figure 3a An example of UE 116 is shown, but it is possible to Figure 3a Make various changes. For example, Figure 3a The various components in can be combined, further subdivided, or omitted, and additional components can be added according to specific needs. As a specific example, processor / controller 340 can be divided into multiple processors, such as one or more central processing units (CPUs) and one or more graphics processing units (GPUs). Moreover, although Figure 3a The UE 116 is shown configured as a mobile phone or smart phone, but the UE can be configured to operate as other types of mobile or stationary devices.

[0057] Figure 3b An example gNB 102 according to the present disclosure is shown. Figure 3b The embodiment of the gNB 102 shown in FIG. is for illustration only, and Figure 1 Other gNBs can have the same or similar configurations. However, gNBs have a variety of configurations, and Figure 3b The scope of the present disclosure is not limited to any particular implementation of the gNB. It should be noted that gNB 101 and gNB 103 can include the same or similar structure as gNB 102.

[0058] like Figure 3b As shown in FIG. 1 , gNB 102 includes multiple antennas 370a-370n, multiple RF transceivers 372a-372n, transmit (TX) processing circuitry 374, and receive (RX) processing circuitry 376. In some embodiments, one or more of the multiple antennas 370a-370n include a 2D antenna array. gNB 102 also includes a controller / processor 378, a memory 380, and a backhaul or network interface 382.

[0059] The RF transceivers 372a-372n receive incoming RF signals from the antennas 370a-370n, such as signals transmitted by a UE or other gNB. The RF transceivers 372a-372n downconvert the incoming RF signals to generate IF or baseband signals. The IF or baseband signals are sent to the RX processing circuitry 376, which generates processed baseband signals by filtering, decoding, and / or digitizing the baseband or IF signals. The RX processing circuitry 376 sends the processed baseband signals to the controller / processor 378 for further processing.

[0060] The TX processing circuit 374 receives analog or digital data (such as voice data, network data, email, or interactive video game data) from the controller / processor 378. The TX processing circuit 374 encodes, multiplexes, and / or digitizes the outgoing baseband data to generate a processed baseband or IF signal. The RF transceivers 372a-372n receive the outgoing processed baseband or IF signals from the TX processing circuit 374 and up-convert the baseband or IF signals to RF signals that are transmitted via the antennas 370a-370n.

[0061] The controller / processor 378 can include one or more processors or other processing devices that control the overall operation of the gNB 102. For example, the controller / processor 378 can control the reception of forward channel signals and the transmission of reverse channel signals through the RF transceivers 372a-372n, the RX processing circuitry 376, and the TX processing circuitry 374 in accordance with well-known principles. The controller / processor 378 can also support additional functionality, such as more advanced wireless communication functionality. For example, the controller / processor 378 can perform a Blind Interference Sensing (BIS) process, such as performed through a Blind Interference Sensing (BIS) algorithm, and decode a received signal with an interference signal subtracted. The controller / processor 378 can support any of a variety of other functions in the gNB 102. In some embodiments, the controller / processor 378 includes at least one microprocessor or microcontroller.

[0062] The controller / processor 378 can also execute programs and other processes resident in the memory 380, such as a basic OS. The controller / processor 378 can also support channel quality measurement and reporting for systems with 2D antenna arrays as described in embodiments of the present disclosure. In some embodiments, the controller / processor 378 supports communications between entities such as web RTC. The controller / processor 378 can move data into or out of the memory 380 as needed by the executing process.

[0063] The controller / processor 378 is also coupled to a backhaul or network interface 382. The backhaul or network interface 382 allows the gNB 102 to communicate with other devices or systems via a backhaul connection or via a network. The backhaul or network interface 382 can support communication via any suitable (multiple) wired or wireless connections. For example, when the gNB 102 is implemented as part of a cellular communication system (such as a cellular communication system supporting 5G or new radio access technology or NR, LTE or LTE-A), the backhaul or network interface 382 can allow the gNB 102 to communicate with other gNBs via a wired or wireless backhaul connection. When the gNB 102 is implemented as an access point, the backhaul or network interface 382 can allow the gNB 102 to communicate with a larger network (such as the Internet) via a wired or wireless local area network or via a wired or wireless connection. The backhaul or network interface 382 includes any suitable structure that supports communication via a wired or wireless connection, such as an Ethernet or RF transceiver.

[0064] The memory 380 is coupled to the controller / processor 378. A portion of the memory 380 can include RAM, while another portion of the memory 380 can include flash memory or other ROM. In some embodiments, a plurality of instructions such as a BIS algorithm are stored in the memory. The plurality of instructions are configured to cause the controller / processor 378 to perform the BIS process and decode the received signal after subtracting at least one interference signal determined by the BIS algorithm.

[0065] As described in more detail below, the transmit and receive paths of the gNB 102 (implemented using the RF transceivers 372a-372n, the TX processing circuitry 374, and / or the RX processing circuitry 376) support aggregated communications with FDD cells and TDD cells.

[0066] although Figure 3b An example of a gNB 102 is shown, but the Figure 3b For example, gNB 102 can include any number of Figure 3a As a specific example, an access point can include a number of backhaul or network interfaces 382, ​​and the controller / processor 378 can support routing functions to route data between different network addresses. As another specific example, while shown as including a single instance of TX processing circuitry 374 and a single instance of RX processing circuitry 376, the gNB 102 can include multiple instances of each (such as one for each RF transceiver).

[0067] In addition, various embodiments of the present disclosure can also be applied to non-terrestrial networks NTN. In NTN, depending on whether the satellite has the ability to decode 5G signals, it can be divided into two scenarios: a scenario based on transparent payload; and a scenario based on regenerative payload. In the scenario based on transparent payload, the satellite does not have the ability to decode 5G signals, and the satellite directly transparently transmits the 5G signals received from the ground terminal to the NTN gateway on the ground. In the scenario based on regenerative payload, the satellite has the ability to decode 5G signals. The satellite decodes the 5G signals received from the ground terminal, and then re-encodes the decoded data and sends it out. It can be sent directly to the NTN gateway on the ground, or it can be sent to other satellites, and then transferred to the NTN gateway on the ground by other satellites.

[0068] In order not to obscure the inventive concept of the present disclosure, a detailed description of the implementation details of the non-terrestrial network NTN is omitted here. In the embodiments of the present disclosure, the base station can be a satellite or an aerial platform with base station decoding capability (i.e., based on a transparent payload scenario), or a satellite or an aerial platform without base station decoding capability (i.e., based on a regenerative payload scenario). For the convenience of description, this article uniformly describes the satellite or aerial platform with or without base station decoding capability in the NTN as a base station.

[0069] Exemplary embodiments of the present disclosure are further described below in conjunction with the accompanying drawings.

[0070] The text and drawings are provided as examples only to help readers understand the present disclosure. They are not intended and should not be interpreted as limiting the scope of the present disclosure in any way. Although certain embodiments and examples have been provided, it is obvious to those skilled in the art based on what is disclosed herein that the embodiments and examples shown may be changed without departing from the scope of the present disclosure.

[0071] The following description will be made by taking the NTN network as an example, but it is understandable that the present disclosure is not limited to the NTN network.

[0072] Since satellites are at extremely high altitudes above the ground, for example, low-orbit satellites are at an altitude of 600km or 1200km, and synchronous satellites are at an altitude of nearly 36,000km, the transmission delay of communication signals between ground terminals and satellites is extremely large, and can even reach tens or hundreds of milliseconds. This requires NTN to use physical layer technologies that are different from those of ground networks, such as time and frequency synchronization / tracking, timing advance of uplink transmission, physical layer processes, and HARQ retransmissions that are sensitive to delay transmission.

[0073] Extremely large transmission delays will lengthen the round trip time (RTT) of HARQ transmission. Excessive waiting time will seriously reduce the data transmission rate. In order to increase the data transmission rate, one method is to support a large number of parallel HARQ processes, but this is difficult to support in both hardware and software. Another method is to disable the HARQ feedback function, which will affect the reliability of data transmission.

[0074] The present disclosure provides a method executed by a user terminal UE, wherein the user terminal UE receives information related to whether a hybrid automatic repeat request HARQ feedback function is turned off, and based on the information, receives downlink control information and a shared channel scheduled by the downlink control information, thereby improving the reliability of data transmission.

[0075] As an exemplary implementation, in the method performed by a user terminal UE provided in the present disclosure, the reliability of data transmission is improved through blind retransmission. Specifically, the user terminal UE receives downlink control information DCI for scheduling a physical downlink shared channel PDSCH or a physical uplink shared channel PUSCH, and receives the DCI for scheduling blind retransmission of PDSCH or PUSCH at least once within a time interval less than the round-trip time RTT from the reception of the DCI for scheduling PDSCH or PUSCH, and the user terminal UE combines and decodes the PDSCH and its blind retransmission, or the base station combines and decodes the PUSCH and its blind retransmission, thereby improving the reliability of data transmission.

[0076] As an exemplary implementation, in the method performed by the user terminal UE provided in the present disclosure, the reliability of data transmission is also improved by means of time slot aggregation transmission. Specifically, the user terminal UE receives downlink control information DCI for scheduling the physical downlink shared channel PDSCH or the physical uplink shared channel PUSCH. The DCI for scheduling the PDSCH includes a field for indicating the number of time slots for the scheduled PDSCH time slot aggregation transmission, thereby improving the reliability of data transmission.

[0077] As an exemplary implementation, in the method provided by the present disclosure and executed by the user terminal UE, the HPN is jointly indicated by combining implicit information and explicit information, so that more HARQ processes can be indicated without increasing the size of the HPN indication field. Specifically, in the present disclosure, the HARQ process number HPN may include explicit information and implicit information, and the explicit information is indicated by the field for indicating HPN contained in the received DCI, and the implicit information is indicated by at least one of the following methods: implicitly indicating by monitoring PDCCH using different cell radio network temporary identifier C-RNTI values; implicitly indicating by monitoring the physical downlink control channel PDCCH in different PDCCH search spaces; implicitly indicating by monitoring PDCCH in different time slots; or implicitly indicating by monitoring PDCCH in different frequency domain resources.

[0078] In addition, the details regarding blind retransmission of PDSCH or PUSCH, PDSCH or PUSCH time slot aggregation transmission, and information related to whether the hybrid automatic repeat request HARQ feedback function is turned off are not clear at present. The embodiments of the present disclosure at least partially solve the above technical problems.

[0079] See also Figure 4 , Figure 4 A flow chart of a method executed by a user terminal UE according to an embodiment of the present disclosure is shown. The method executed by the user terminal UE includes step S410 and step S420.

[0080] Step S410: receiving information related to whether a hybrid automatic repeat request HARQ feedback function is disabled.

[0081] There are many implementation methods for the information related to whether the hybrid automatic repeat request HARQ feedback function is disabled, which will be described below in conjunction with the accompanying drawings and embodiments.

[0082] Step S420: Based on the information, receive downlink control information and a shared channel scheduled by the downlink control information.

[0083] The shared channel may be a physical downlink shared channel PDSCH or a physical uplink shared channel PUSCH. In the subsequent embodiments, the physical downlink shared channel PDSCH is mainly used as an example for explanation, but it can be understood that the scheme of the physical uplink shared channel PUSCH is also within the scope of protection of the present disclosure, and the specific explanation is omitted only for the sake of brevity.

[0084] The user terminal UE receives information related to whether a hybrid automatic repeat request HARQ feedback function is turned off, and based on the information, receives downlink control information and a shared channel scheduled by the downlink control information, thereby improving the reliability of data transmission.

[0085] The following describes in detail the blind retransmission and implementation details in the method performed by the user terminal UE provided by the present disclosure in conjunction with the accompanying drawings.

[0086] Taking PDSCH as an example, if the HARQ feedback function of PDSCH is turned off, the base station cannot decide whether to retransmit PDSCH based on HARQ feedback, and can only retransmit PDSCH blindly. That is, after receiving the initial transmission of PDSCH, the UE will also receive at least one blind retransmission of the PDSCH. The UE can improve the decoding performance of PDSCH by combining the initial transmission and blind retransmission of the PDSCH. Here, the UE does not feedback the corresponding HARQ-ACK for the initial transmission and / or blind retransmission of PDSCH.

[0087] The difference between blind retransmission and retransmission based on HARQ feedback is that the earliest time of transmission can be different. Retransmission based on HARQ feedback must meet the RTT requirement, that is, the interval between initial transmission and retransmission must be greater than or equal to RTT, while blind retransmission does not have this restriction. The interval between initial transmission and retransmission can be less than RTT, thereby improving the data transmission rate.

[0088] The following is combined with Figure 5 A method proposed in the present disclosure and executed by a user terminal UE is introduced in detail.

[0089] Please refer to Figure 5 , Figure 5 A partial flow chart of a method executed by a user terminal UE according to an embodiment of the present disclosure is shown.

[0090] Step S510: receiving downlink control information DCI for scheduling a physical downlink shared channel PDSCH or a physical uplink shared channel PUSCH.

[0091] As an implementation, the UE may perform blind retransmission when the hybrid automatic repeat request HARQ feedback function is disabled. Specifically, the UE may perform step S510 when the information related to whether the hybrid automatic repeat request HARQ feedback function is disabled indicates that the HARQ feedback function is disabled.

[0092] Step S520: receiving DCI for scheduling blind retransmission of PDSCH or PUSCH at least once at the earliest within a time interval less than the round trip time RTT since receiving DCI for scheduling PDSCH or PUSCH.

[0093] Blind retransmission refers to retransmission not based on hybrid automatic repeat request HARQ feedback.

[0094] The reliability of data transmission is improved by performing blind retransmission by the user terminal UE, specifically, by receiving downlink control information DCI for scheduling a physical downlink shared channel PDSCH or a physical uplink shared channel PUSCH, and receiving the DCI for blind retransmission of scheduling PDSCH or PUSCH at least once within a time interval less than the round-trip time RTT since the reception of the DCI for scheduling PDSCH or PUSCH.

[0095] Optionally, the above-mentioned blind retransmission may be configurable, for example, may be configured through system information or UE-specific radio resource control RRC signaling.

[0096] Specifically, as an implementation manner, the method executed by the user terminal UE may further include: receiving system information, where the system information is used to indicate a blind retransmission configuration, or is used to indicate a blind retransmission configuration of each hybrid automatic repeat request HARQ process respectively.

[0097] As another implementation, the method executed by the user terminal UE may further include: receiving UE-specific radio resource control RRC signaling, where the UE-specific RRC signaling is used to indicate the blind retransmission configuration of the UE, or to indicate the blind retransmission configuration of each hybrid automatic repeat request HARQ process of the UE respectively.

[0098] By configuring blind retransmission in the above-mentioned multiple ways, the configuration and use of blind retransmission become more flexible.

[0099] Optionally, the above-mentioned blind retransmission may be used only for the HARQ process with the HARQ feedback function disabled. For example, the HARQ process with the HARQ feedback function disabled may be configured to be able to perform blind retransmission, or to be able to perform blind retransmission by default.

[0100] By configuring the HARQ process with the HARQ feedback function turned off to be able to perform blind retransmission, the problem of the reliability of data transmission affected by the HARQ feedback function being turned off is improved, and blind retransmission is configured to be used only for the HARQ process with the HARQ feedback function turned off, so that the data transmission volume of other HARQ processes with the HARQ feedback function not turned off will not be affected.

[0101] Optionally, blind retransmission of PDSCH and PDSCH retransmission based on HARQ feedback can be used in conjunction. Figure 6 , Figure 6 A schematic diagram showing the joint use of blind retransmission of PDSCH and PDSCH retransmission based on HARQ feedback.

[0102] like Figure 6 As shown, when the number of blind retransmissions received by the UE for the PDSCH reaches the maximum number of retransmissions, a hybrid automatic repeat request HARQ feedback is sent to the base station. After receiving the HARQ feedback, the base station can decide whether to retransmit the PDSCH. Figure 6 In the present invention, the base station retransmits the PDSCH again after receiving the HARQ feedback, so the UE receives the retransmission based on the HARQ feedback.

[0103] The maximum number of retransmissions is a predefined value, or a value configured by radio resource control RRC signaling or a medium access control control element MAC CE.

[0104] The reliability of data transmission can be further improved through the blind retransmission of the PDSCH and the PDSCH retransmission based on HARQ feedback.

[0105] Optionally, the DCI for scheduling PDSCH or PUSCH includes a field for indicating whether there is blind retransmission after the scheduled PDSCH or PUSCH, and the method performed by the user terminal UE may further include steps S610 to S630. Figure 7 , Figure 7 A partial flow chart of a method executed by a user terminal UE according to an embodiment of the present disclosure is shown.

[0106] Step S610: determining whether there is a blind retransmission after the scheduled PDSCH based on a field in the DCI for scheduling the PDSCH or PUSCH for indicating whether there is a blind retransmission after the scheduled PDSCH or PUSCH.

[0107] The scheduled PDSCH or PUSCH includes an initial transmission or a blind retransmission of the scheduled PDSCH or PUSCH.

[0108] If the DCI for scheduling the PDSCH or PUSCH indicates that there is no blind retransmission of the scheduled PDSCH or PUSCH, step S620 is executed to clear the buffered data corresponding to the PDSCH or PUSCH regardless of whether the PDSCH or PUSCH is successfully decoded.

[0109] If the DCI used to schedule PDSCH or PUSCH indicates that there is a blind retransmission after the scheduled PDSCH or PUSCH, step S630 is executed. If the PDSCH or PUSCH is not successfully decoded, the cached data corresponding to the PDSCH or PUSCH is retained. In the above manner, the storage resources of the UE can be more effectively utilized, and the UE further improves the decoding performance of the PDSCH by combining the initial transmission and blind retransmission of the PDSCH. In addition, it can be understood that after sending the PUSCH, the UE will also cache the cached data corresponding to the PUSCH. Therefore, for the blind retransmission of the PUSCH, by clearing the cached data corresponding to the PUSCH, the storage resources of the UE can also be more effectively utilized.

[0110] Optionally, the DCI for scheduling PDSCH or PUSCH includes a number of blind retransmissions after indicating the scheduled PDSCH or PUSCH. For example, the number of blind retransmissions may be 0, 1, 2, 4, etc., and the present disclosure does not impose any limitation on this.

[0111] If the DCI for scheduling PDSCH indicates that the number of blind retransmissions after the scheduled PDSCH is 0, the UE clears the cached data corresponding to the PDSCH regardless of whether the PDSCH is successfully decoded; if the DCI for scheduling PUSCH indicates that the number of blind retransmissions after the scheduled PUSCH is 0, the cached data corresponding to the PUSCH is cleared after sending the PUSCH.

[0112] When the number of blind retransmissions after the scheduled PDSCH or PUSCH indicated in the DCI is 0, the cached data corresponding to the scheduled PDSCH or PUSCH is cleared, thereby no additional requirements are placed on the buffer size and software and hardware capabilities of the UE.

[0113] Optionally, the number or maximum number of blind retransmissions of the PDSCH or PUSCH is a predefined value, or a value configured by radio resource control RRC signaling or a media access control control unit MAC CE. For example, the number or maximum number of blind retransmissions of the PDSCH or PUSCH can be 0, 1, 2, 4, etc., and the present disclosure does not impose any limitation on this.

[0114] If the radio resource control RRC signaling or the medium access control control element MAC CE indicates that the number of blind retransmissions of PDSCH or PUSCH is 0, no matter whether the PDSCH or PUSCH can be decoded correctly, the UE clears the buffered data corresponding to the scheduled PDSCH or PUSCH.

[0115] By clearing the cached data corresponding to the scheduled PDSCH or PUSCH when the number of blind retransmissions after the scheduled PDSCH or PUSCH indicated in the radio resource control RRC signaling or the media access control control unit MAC CE is 0, there is no additional requirement for the UE's cache area size and software and hardware capabilities.

[0116] Optionally, the number or maximum number of blind retransmissions may be different for each automatic repeat request HARQ process. That is, the base station may configure the number or maximum number of blind retransmissions for each HARQ process. Of course, it is understandable that the number or maximum number of blind retransmissions may also be the same for each automatic repeat request HARQ process.

[0117] Optionally, when the number of blind retransmissions of the received PDSCH reaches the maximum number of blind retransmissions, the cached data corresponding to the PDSCH is cleared regardless of whether the PDSCH is successfully decoded; or when the number of blind retransmissions of the received PUSCH reaches the maximum number of blind retransmissions, the cached data corresponding to the PUSCH is cleared after the last blind retransmission of the PUSCH is sent.

[0118] When the number of blind retransmissions of the PDSCH received by the UE reaches the maximum number of blind retransmissions, the cache data corresponding to the scheduled PDSCH is cleared, so that the storage resources of the UE can be used more effectively.

[0119] Optionally, the DCI used for scheduling PDSCH or PUSCH or the PDSCH or PUSCH and the DCI used for scheduling blind retransmission of PDSCH or PUSCH or the blind retransmission of PDSCH or PUSCH can meet the minimum time interval requirement, and the minimum time interval is related to the processing time of PDSCH or PUSCH, and can be predefined or preconfigured. The advantage of setting the minimum time interval is that after completing the reception processing of PDSCH or the transmission processing of PUSCH, the UE can release the corresponding buffered data to receive the next blind retransmission of the PDSCH, so there is no additional requirement for the buffer size and software and hardware capabilities of the UE.

[0120] Optionally, the DCI used to schedule PDSCH or PUSCH or the PDSCH or PUSCH and the blind retransmission DCI used to schedule PDSCH or PUSCH or the blind retransmission of the PDSCH or PUSCH can meet the maximum time interval requirement, and the maximum time interval can be related to the RTT of PDSCH or PUSCH, and can be predefined or preconfigured. The advantage of setting the maximum time interval is that if the UE has not received the blind retransmission of the same PDSCH, then after the maximum time interval, the UE should clear the cache data corresponding to the PDSCH, so there is no additional requirement for the UE's cache size and software and hardware capabilities.

[0121] Optionally, the UE may monitor the blind retransmission of the PDSCH or PUSCH within a time window after the DCI used to schedule the PDSCH or PUSCH or after the PDSCH or PUSCH. The length of the time window may be related to the RTT of the PDSCH or PUSCH, and may be predefined or preconfigured. The starting position of the time window may be predefined, for example, the time window starts from a predefined interval after the PDSCH or PUSCH transmission. The benefit of setting the time window is that if the UE does not receive the blind retransmission of the PDSCH within the time window, the UE shall clear the cached data corresponding to the PDSCH, so that there is no additional requirement for the size of the UE's cache area and the software and hardware capabilities.

[0122] As a specific implementation of the above concept, optionally, the method performed by the user terminal UE may also include:

[0123] Receive at least one of the following indications:

[0124] Information indicating a time interval, a first minimum time interval, or a first maximum time interval between a DCI for scheduling a PDSCH or a PUSCH and a DCI for scheduling a blind retransmission of the PDSCH or PUSCH;

[0125] Indicates the time interval, the second minimum time interval, or the second maximum time interval between the PDSCH or PUSCH and the DCI used to schedule blind retransmission of the PDSCH or PUSCH;

[0126] Indicate the time interval, the third minimum time interval, or the third maximum time interval between the PDSCH or PUSCH and the blind retransmission of the PDSCH or PUSCH;

[0127] Information indicating a time window for monitoring blind retransmission of the PDSCH or PUSCH, wherein a starting position of the time window is a position of a predefined or preconfigured interval after a DCI for scheduling the PDSCH or PUSCH, or a position of a predefined or preconfigured interval after the PDSCH or PUSCH;

[0128] At least one of the indication information is indicated by a DCI, a radio resource control RRC signaling or a medium access control control element MAC CE for scheduling a PDSCH or a PUSCH.

[0129] It can be understood that, for example, the above-mentioned indication of the time interval between the DCI used to schedule PDSCH or PUSCH and the DCI used to schedule the blind retransmission of the PDSCH or PUSCH refers to the time interval between the DCI used to schedule PDSCH and the DCI used to schedule the blind retransmission of the PDSCH, or the DCI used to schedule PUSCH and the DCI used to schedule the blind retransmission of the PUSCH.

[0130] For example, the above-mentioned indication of the time interval between the PDSCH or PUSCH and the DCI used to schedule the blind retransmission of the PDSCH or PUSCH refers to the time interval between the PDSCH and the DCI used to schedule the blind retransmission of the PDSCH, or the time interval between the PUSCH and the DCI used to schedule the blind retransmission of the PUSCH.

[0131] For example, the time interval between the PDSCH or PUSCH and the blind retransmission of the PDSCH or PUSCH is the time interval between the PDSCH and the blind retransmission of the PDSCH, or the time interval between the PUSCH and the blind retransmission of the PUSCH. Further, optionally, the method performed by the user terminal UE may also include:

[0132] If the UE does not receive a DCI for scheduling blind retransmission of the PDSCH or PUSCH within a first maximum time interval since receiving the DCI for scheduling the PDSCH or PUSCH;

[0133] or, if within a second maximum time interval from the PDSCH, no DCI for scheduling blind retransmission of the PDSCH is received;

[0134] or, if no blind retransmission of the PDSCH is received within a third maximum time interval from the PDSCH;

[0135] Or, if the blind retransmission of the PDSCH is not monitored within the time window for monitoring the blind retransmission of the PDSCH;

[0136] The cache data corresponding to the PDSCH or PUSCH is cleared.

[0137] Optionally, the time interval between the DCI used to schedule the PDSCH or PUSCH and the DCI used to schedule the blind retransmission of the PDSCH or PUSCH, the time interval between the PDSCH or PUSCH and the DCI used to schedule the blind retransmission of the PDSCH or PUSCH, and the time interval between the PDSCH or PUSCH and the blind retransmission of the PDSCH or PUSCH may be the same or different.

[0138] Optionally, the first minimum time interval, the second minimum time interval, and the third minimum time interval may be the same or different.

[0139] Optionally, the first maximum time interval, the second maximum time interval, and the third maximum time interval may be the same or different.

[0140] Optionally, the PDSCH or PUSCH includes a semi-persistent scheduling (Semi-Persistent Scheduling, SPS) PDSCH or PUSCH. That is, the semi-persistent scheduling PDSCH or PUSCH can also support a blind retransmission function, that is, after receiving the SPS PDSCH, the UE may receive a blind retransmission of the PDSCH based on dynamic scheduling.

[0141] Optionally, the UE only feeds back HARQ-ACK for the initial transmission of the PDSCH, and does not feed back HARQ-ACK for any retransmission of the PDSCH (including blind retransmission or retransmission based on HARQ-ACK feedback). The benefit of this method is to achieve a compromise between reliability and transmission delay.

[0142] Optionally, the above-mentioned similar scheme can also be used for uplink, for example, scheduling the physical uplink shared channel PUSCH also supports the blind retransmission function. As a specific implementation manner, the method performed by the user terminal UE may also include:

[0143] Receiving downlink control information DCI for scheduling a physical uplink shared channel PUSCH;

[0144] The DCI for scheduling blind retransmission of the PUSCH is received at least once at the earliest within a time interval less than the round trip time RTT since the DCI for scheduling the PUSCH is received.

[0145] In particular, after receiving the above-mentioned downlink control information DCI for scheduling the physical uplink shared channel PUSCH and before sending the PUSCH, the UE may receive blind retransmission scheduling of the PUSCH; in particular, the downlink control information DCI for scheduling the physical uplink shared channel PUSCH received by the UE and the DCI for scheduling the blind retransmission of PUSCH should meet a predefined or preconfigured minimum interval; in particular, the downlink control information DCI for scheduling the physical uplink shared channel PUSCH received by the UE and the DCI for scheduling the blind retransmission of PUSCH should meet a predefined or preconfigured maximum interval.

[0146] The following continues to introduce in detail the time slot aggregation transmission and its implementation details in the method performed by the user terminal UE provided by the present disclosure in conjunction with the accompanying drawings.

[0147] Taking PDSCH as an example, since the HARQ RTT duration is too long, the HARQ feedback function of PDSCH is turned off, and the base station cannot decide whether to retransmit PDSCH based on HARQ feedback. In order to improve the PDSCH decoding performance, the base station can send PDSCH by time slot aggregation.

[0148] PDSCH time slot aggregation transmission refers to the transmission of PDSCH across multiple time slots, that is, PDSCH occupies the same time-frequency resources for transmission in multiple time slots. PDSCH can be sent in a repeated manner in multiple time slots, and the PDSCH in each time slot can be decoded independently. The UE improves the decoding performance from the perspective of improving the signal-to-noise ratio by merging the PDSCH in multiple time slots. This time slot aggregation can also be called repetition. Alternatively, PDSCH can be sent in multiple time slots based on overall rate matching. Here, the PDSCH in a single time slot cannot be decoded independently. The UE improves the decoding performance from the perspective of reducing the code rate by receiving the PDSCH in all time slots.

[0149] As a specific implementation method, please refer to Figure 8 , Figure 8 A partial flow chart of a method performed by a user terminal UE according to an embodiment of the present disclosure is shown. The method performed by the user terminal UE may also include:

[0150] Step S710: receiving downlink control information DCI for scheduling a physical downlink shared channel PDSCH or a physical uplink shared channel PUSCH, wherein the DCI for scheduling PDSCH or PUSCH includes a field for indicating the number of time slots for time slot aggregation transmission of the scheduled PDSCH or PUSCH.

[0151] Among them, the size of the field used to indicate the number of time slots for the scheduled PDSCH or PUSCH time slot aggregation transmission in the DCI used to schedule PDSCH or PUSCH is determined by the maximum number of time slots for the scheduled PDSCH or PUSCH time slot aggregation transmission, and the maximum number of time slots is configured via radio resource control RRC signaling or media access control control unit MAC CE.

[0152] It can be understood that the above step S710 can be performed when the information related to whether the hybrid automatic repeat request HARQ feedback function is turned off indicates whether the HARQ feedback function is turned off or turned on. That is, the above PDSCH or PUSCH time slot aggregation transmission can be performed when the HARQ feedback function is turned off or when the HARQ feedback function is turned on.

[0153] Optionally, the maximum number of time slots can be configured separately for at least one of each service quality QoS of PDSCH or PUSCH, each hybrid automatic repeat request HARQ process of PDSCH or PUSCH, each logical channel of PDSCH or PUSCH, each priority of PDSCH or PUSCH, each scheduling method of PDSCH or PUSCH (wherein the scheduling method includes dynamic scheduling and semi-static scheduling), or whether the HARQ feedback function of PDSCH or PUSCH is turned on.

[0154] Optionally, the PDSCH or PUSCH with the HARQ feedback function turned off and the PDSCH or PUSCH with the HARQ feedback function turned on can both be sent using time slot aggregation, but the number or maximum number of aggregated time slots used by each may be different. For example, the base station configures the number or maximum number of aggregated time slots for the PDSCH or PUSCH with the HARQ feedback function turned off and the PDSCH or PUSCH with the HARQ feedback function turned on through radio resource control RRC signaling or media access control control unit MAC CE.

[0155] Optionally, there may be a certain interval between the time slots for PDSCH or PUSCH time slot aggregation transmission, that is, multiple time slots used for PDSCH time slot aggregation transmission are discontinuous.

[0156] Optionally, the same interval is provided between each time slot or each time slot cluster (bundle) in the multiple time slots used for PDSCH or PUSCH time slot aggregation transmission, where a time slot cluster refers to two or more consecutive time slots. In this way, time diversity gain can be obtained, and the base station can also schedule multiple UEs together, that is, the PDSCH or PUSCH aggregation time slot transmissions of multiple UEs are interleaved in time, and the interval between the aggregated time slots is also called the interleaving interval.

[0157] See also Fig. 9 , Fig. 9 FIG. 2 shows a schematic diagram of cross-distribution of aggregated time slots of three UEs in time according to an embodiment of the present disclosure. Fig. 9 As shown, the aggregated time slots of the three UEs are cross-distributed in time, thereby improving the time diversity gain.

[0158] Below Fig.10 and Fig.11 The interval between each time slot or each time slot cluster in a plurality of time slots used for PDSCH time slot aggregation transmission is described respectively.

[0159] Please refer to Fig.10 , Fig.10 A schematic diagram showing an interval between each time slot in a plurality of time slots used for PDSCH time slot aggregation transmission according to an embodiment of the present disclosure is shown.

[0160] like Fig.10 As shown, PDSCH is transmitted on 4 aggregated time slots, and there is a certain time interval between every two adjacent time slots, and the interval sizes are the same, namely, Gap.

[0161] Please refer to Fig.11 , Fig.11 A schematic diagram showing the interval between each time slot cluster in a plurality of time slots for PDSCH time slot aggregation transmission according to an embodiment of the present disclosure is shown.

[0162] like Fig.11 As shown, PDSCH is transmitted on 8 aggregated time slots, and every two adjacent time slots form a time slot cluster. There is a certain time interval between every two time slot clusters, and the interval sizes are the same, which are all Gap.

[0163] In addition, whether PDSCH timeslot aggregation transmission has an interleaving interval and the size of the interleaving interval of PDSCH timeslot aggregation transmission are configurable.

[0164] Optionally, the method performed by the user terminal UE may further include:

[0165] Receive at least one of the following indications:

[0166] Information indicating whether there is a gap between each time slot or between each time slot cluster in a plurality of time slots for scheduled PDSCH or PUSCH time slot aggregation transmission; or

[0167] Information indicating the size of the interval between each time slot or each time slot cluster in a plurality of time slots for the scheduled PDSCH or PUSCH time slot aggregation transmission, for example, the interval may be 1 time slot, 2 time slots, 4 time slots, etc.;

[0168] At least one of the indication information is configured through DCI, radio resource control RRC signaling or medium access control control element MAC CE for scheduling PDSCH or PUSCH.

[0169] As a specific implementation, for example, the base station can pre-configure whether there is an interleaving interval for PDSCH or PUSCH time slot aggregation transmission through radio resource control RRC signaling or media access control control unit MAC CE. When PDSCH or PUSCH time slot aggregation transmission is configured to have an interleaving interval, the base station can further configure the size of the interleaving interval; or, dynamically indicate whether there is an interleaving interval between the aggregated time slots through the DCI used to schedule PDSCH or PUSCH time slot aggregation. The size of the interleaving interval between the aggregated time slots can be predefined or pre-configured through radio resource control RRC signaling or media access control control unit MACCE.

[0170] For another example, the base station may pre-configure the size of the interleaving interval of the PDSCH or PUSCH time slot aggregation through radio resource control RRC signaling or media access control control unit MAC CE, such as 1 time slot, 2 time slots, 4 time slots, etc.; or dynamically indicate the size of the interleaving interval between the aggregated time slots through the DCI for scheduling the PDSCH or PUSCH time slot aggregation. The set of configurable sizes of the interleaving interval between the aggregated time slots may be pre-defined or pre-configured through radio resource control RRC signaling or media access control control unit MAC CE.

[0171] Through the above manner, the base station can dynamically schedule PDSCH or PUSCH time slot aggregation transmission to be continuous or with an interleaving interval.

[0172] In addition, the size of the time slot cluster used for interleaving of PDSCH or PUSCH time slot aggregation transmission may also be configurable. Optionally, the size of the time slot cluster is configured through the DCI, radio resource control RRC signaling, or media access control control unit MAC CE used to schedule PDSCH or PUSCH. For example, the base station may configure the size of the time slot cluster used for interleaving of PDSCH or PUSCH time slot aggregation transmission through radio resource control RRC signaling or media access control control unit MAC CE, such as an interval of 1 time slot, 2 time slots, 4 time slots, etc.; or, dynamically indicate the size of the time slot cluster used for interleaving through the DCI used to schedule PDSCH or PUSCH. The set of sizes of time slot clusters used for interleaving of configurable PDSCH or PUSCH aggregation time slot transmission may be predefined or preconfigured through the media access control control unit MAC CE.

[0173] For PDSCH or PUSCH time slot aggregation transmission, since the number of aggregated time slots is large or the size of the interleaving interval within the aggregated time slot is large, the subsequently received DCI indicating the time slot format (SFI, Slot Format Indicator) may indicate that a time slot in the aggregated time slot is an uplink time slot or an unavailable time slot, then whether the UE can still transmit on these time slots is a question.

[0174] In order to solve the above problem, optionally, the method performed by the user terminal UE provided in the present disclosure may also include:

[0175] When a time slot for scheduled PDSCH or PUSCH time slot aggregation transmission is identified as an unavailable time slot, the UE discards the signal that should be mapped to the time slot or maps it to the next available time slot.

[0176] It can be understood that all the above-mentioned designs for PDSCH aggregated time slot transmission can be similarly applied to PUSCH and will not be described in detail.

[0177] The present disclosure also makes some improvements in the details of disabling HARQ feedback. The implementation details of disabling HARQ feedback in the method performed by the user terminal UE provided in the present disclosure are described in detail below in conjunction with the accompanying drawings.

[0178] As mentioned above, since the RTT duration of HARQ is too long, in order to improve transmission efficiency, the HARQ feedback function is disabled.

[0179] Optionally, in Figure 4 The information related to whether the hybrid automatic repeat request HARQ feedback function is disabled received in step S410 may include at least one of the following information:

[0180] Information indicating the number of downlink DL HARQ processes for which the hybrid automatic repeat request HARQ feedback function is disabled;

[0181] Information indicating the number of DL HARQ processes for which the HARQ feedback function is enabled; or

[0182] Information indicating the total number of DL HARQ processes including the number of DL HARQ processes in which the HARQ feedback function is disabled and the number of DL HARQ processes in which the HARQ feedback function is enabled;

[0183] At least one of the information is configured through radio resource control RRC signaling or medium access control element MAC CE.

[0184] Optionally, in Figure 4The information related to whether the hybrid automatic repeat request HARQ feedback function is turned off and received in step S410 is related to the HARQ process number HPN. The PDSCH transmission with the HARQ feedback function turned on and the PDSCH transmission with the HARQ feedback function turned off use different HARQ processes. The method provided by the present disclosure and performed by the user terminal UE may also include: determining whether the HARQ feedback function of the corresponding HARQ process is turned off based on the HARQ process number HPN.

[0185] Optionally, the DL HARQ process with the HARQ feedback function enabled uses consecutive HARQ process numbers, and increases from the smallest HARQ process number or decreases from the largest HARQ process number.

[0186] As a specific implementation method, a PDSCH with an HARQ feedback function turned on and a PDSCH with an HARQ feedback function turned off can use different HARQ processes. The base station can configure the number of DL HARQ processes with an HARQ feedback function turned on through radio resource control RRC signaling or media access control control unit MAC CE, and default the DL HARQ processes with an HARQ feedback function turned on to use consecutive HARQ process numbers (HARQ Process Number, HPN), for example, starting from the smallest HARQ process number to increase, that is, the HPN indication value starts to increase from 0; or, starting from the largest HARQ process number to decrease, assuming that the total number of HARQ processes is N, that is, the HPN indication value starts to decrease from N-1. In this way, the UE can know which process numbers are used for transmission by the PDSCH with an HARQ feedback function turned on according to the number of DL HARQ processes with an HARQ feedback function turned on configured by radio resource control RRC signaling or media access control control unit MAC CE, and thus can determine whether the corresponding HARQ feedback function is turned off according to the HPN indication in the received DCI.

[0187] For example, assuming that the total number of DL HARQ processes is 16, the HPN indication field size in the DCI is 4 bits, and the number of DL HARQ processes for which the HARQ feedback function is enabled through the radio resource control RRC signaling or the media access control control unit MAC CE configuration is 4, then when the HPN indication value is 0000, 0001, 0010, 0011, it is determined that the PDSCH of the corresponding HARQ process supports HARQ feedback, and when the HPN indicates other values, it is determined that the PDSCH of the corresponding HARQ process does not support HARQ feedback.

[0188] Optionally, in Figure 4The information related to whether the hybrid automatic repeat request HARQ feedback function is turned off received in step S410 may include: information indicating whether each downlink DL HARQ process supports HARQ feedback, wherein the information is configured through radio resource control RRC signaling or medium access control control element MAC CE.

[0189] Optionally, the maximum number of HARQ processes in which the HARQ feedback function is disabled is N-1, where N is the total number of HARQ processes.

[0190] Optionally, the HARQ feedback function is always enabled by default for the HARQ process whose HPN indication value is 0 or N-1, where N is the total number of HARQ processes, that is, the HARQ feedback function of the first or last HARQ process is always enabled by default.

[0191] Optionally, the base station configures a corresponding set of DL HARQ process numbers for PDSCH with the HARQ feedback function turned on and PDSCH with the HARQ feedback function turned off through radio resource control RRC signaling or media access control control unit MAC CE. In other words, the base station configures whether to support HARQ feedback for each DL HARQ process.

[0192] Optionally, PDSCH transmission with a disabled HARQ feedback function occupies only one downlink DL HARQ process, and the HPN indicator value of the HARQ process is specified to be 0 or N-1, where N is the total number of HARQ processes.

[0193] Optionally, Figure 4 Receiving information related to whether the hybrid automatic repeat request HARQ feedback function is turned off in step S410 can be specifically implemented as: receiving radio resource control RRC signaling or media access control control unit MAC CE for configuring the downlink DL HARQ process in which the HARQ feedback function is turned off, and in the DL HARQ process, receiving downlink control information DCI containing information for indicating whether the current PDSCH transmission needs to perform HARQ feedback.

[0194] Optionally, when a HARQ process with a downlink DL HARQ feedback function turned off or on is used for semi-persistently scheduled SPS PDSCH transmission, whether HARQ feedback needs to be performed is determined according to the on or off configuration of the HARQ feedback function corresponding to the SPS PDSCH.

[0195] Specifically, the above configuration of turning on / off the DL HARQ feedback function for each HARQ process number is applicable not only to dynamically scheduled PDSCH, but also to Semi-Persistent Scheduling (SPS) PDSCH. For example, assuming that the HARQ feedback function of DL HARQ process number #n is turned off, no matter the HARQ process number is used for dynamically scheduled PDSCH transmission or SPS PDSCH transmission, the UE does not need to feedback ACK / NACK, but for the DCI indicating SPS transmission activation or resource release, it is still necessary for the UE to feedback ACK.

[0196] The above configuration of turning on / off the DL HARQ feedback function for each HARQ process number is only applicable to dynamically scheduled PDSCH, and is not applicable to Semi-Persistent Scheduling (SPS) PDSCH. For SPS PDSCH, the base station can configure the turning on / off of the DL HARQ feedback function for each configured SPS PDSCH through high-level signaling (RRC signaling or MAC CE). In particular, even if the HARQ feedback function of the SPS PDSCH is turned off, it is still necessary for the UE to feedback ACK for the DCI indicating the activation of SPS transmission or the release of resources. For example, assuming that the HARQ feedback function of the DL HARQ process number #n is turned off, then only when the HARQ process number is used for dynamically scheduled PDSCH transmission, the UE does not need to feedback ACK / NACK, but when the HARQ process number is used for SPS PDSCH transmission, the UE decides whether to perform HARQ feedback according to the turning on or off configuration of the HARQ feedback function of the corresponding SPS PDSCH, that is, the UE may need to feedback ACK / NACK.

[0197] When the DL HARQ feedback function is turned off, all DCI fields related to HARQ feedback in the DCI are not needed, such as the PUCCH resource indication field, the PUCCH transmit power control indication field, etc. These indication fields can be reinterpreted to indicate other information, such as the number of PDSCH blind retransmissions, whether PDSCH has the next blind retransmission, the interval of the next blind retransmission of PDSCH, the minimum interval of the next blind retransmission of PDSCH, the maximum interval of the next blind retransmission of PDSCH, the listening time window of the next blind retransmission of PDSCH, the number of PDSCH aggregation time slots, and the interleaving interval of PDSCH aggregation time slots. One or more of them.

[0198] Optionally, Figure 4The information related to whether the hybrid automatic repeat request HARQ feedback function is turned off received in step S410 includes a DCI for scheduling a PDSCH with the HARQ feedback function turned on and a DCI for scheduling a PDSCH with the HARQ feedback function turned off, and both have the same DCI format, that is, have the same DCI payload size, and determine whether the corresponding PDSCH needs to perform HARQ feedback by at least one of the following methods:

[0199] (1) By using different cell radio network temporary identifiers (C-RNTI) values ​​to monitor the physical downlink control channel (PDCCH), it is determined whether the corresponding PDSCH needs to perform HARQ feedback.

[0200] For example, different RNTI values ​​may be used for scrambling, and the UE is configured to monitor the physical downlink control channel PDCCH by using different cell radio network temporary identifier C-RNTI values ​​to determine whether the corresponding PDSCH needs to perform HARQ feedback.

[0201] (2) By monitoring the PDCCH in different PDCCH search spaces, it is determined whether the corresponding PDSCH needs to perform HARQ feedback.

[0202] For example, the UE monitors DCI with the HARQ feedback function enabled and DCI with the HARQ feedback function disabled in two different PDCCH search spaces to determine whether the corresponding PDSCH needs to perform HARQ feedback.

[0203] (3) By monitoring the PDCCH in different time slots, it is determined whether the corresponding PDSCH needs to perform HARQ feedback.

[0204] For example, the UE monitors the DCI with the HARQ feedback function enabled and the DCI with the HARQ feedback function disabled in two different time slot groups to determine whether the corresponding PDSCH needs to perform HARQ feedback.

[0205] (4) By monitoring the PDCCH on different frequency domain resources, it is determined whether the corresponding PDSCH needs to perform HARQ feedback.

[0206] For example, the UE monitors the DCI with the HARQ feedback function enabled and the DCI with the HARQ feedback function disabled on two different frequency domain resources to determine whether the corresponding PDSCH needs to perform HARQ feedback.

[0207] (5) Determine whether the corresponding PDSCH needs to perform HARQ feedback through the HARQ process number HPN.

[0208] For example, the UE determines whether the HARQ feedback function is enabled based on the HPN field in the DCI to determine whether the corresponding PDSCH needs to perform HARQ feedback, that is, PDSCHs with certain HPN indication values ​​need to feedback HARQ-ACK, while PDSCHs with certain HPN indication values ​​do not need to feedback HARQ-ACK.

[0209] (6) Whether the corresponding PDSCH needs to perform HARQ feedback is determined through a specific field included in the downlink control information DCI used to schedule the PDSCH.

[0210] For example, the dedicated field may be 1 bit.

[0211] Of course, the present disclosure is not limited to the above implementations, and any implementation of determining whether the corresponding PDSCH needs to perform HARQ feedback falls within the scope of protection of the present disclosure.

[0212] Optionally, Figure 4 The information related to whether the hybrid automatic repeat request HARQ feedback function is turned off received in step S410 includes a DCI for scheduling a PDSCH with the HARQ feedback function turned on and a DCI for scheduling a PDSCH with the HARQ feedback function turned off, and the two have different DCI formats, that is, the DCI payload sizes are different. The UE can decide whether the corresponding PDSCH needs to perform HARQ feedback according to the monitored DCI format.

[0213] In addition, the present disclosure has also made some improvements in some details about HPN. The implementation details of HPN in the method performed by the user terminal UE provided by the present disclosure are described in detail below in conjunction with the accompanying drawings.

[0214] Since the RRT duration of HARQ feedback is long, the data transmission rate can be increased by increasing the number of parallel HARQ processes. In order to support more HARQ processes without increasing the size of the HPN indication field, implicit information can be used to assist in indicating HPN. Optionally, the HARQ process number HPN may include explicit information and implicit information, the explicit information is indicated by the field for indicating HPN contained in the received DCI, and the implicit information is indicated by at least one of the following methods:

[0215] (1) Implicit indication by monitoring the PDCCH using different cell radio network temporary identifier (C-RNTI) values.

[0216] For example, the number of HARQ processes is increased to 32, the HPN indication field in the DCI uses the existing 4 bits, and the UE is configured with two different C-RNTI values ​​for HARQ processes in different HPN ranges, one C-RNTI value for HARQ processes in the HPN range of 0 to 15, and the other C-RNTI value for HARQ processes in the HPN range of 16 to 31.

[0217] (2) Implicit indication by monitoring the physical downlink control channel PDCCH in different PDCCH search spaces.

[0218] For example, the number of HARQ processes is increased to 32, the HPN indication field in the DCI uses the existing 4 bits, and the UE monitors HARQ processes in different HPN ranges in different PDCCH search spaces. One PDCCH search space is used to monitor HARQ processes in the HPN range of 0 to 15, and the other PDCCH search space is used to monitor HARQ processes in the HPN range of 16 to 31.

[0219] (3) Implicit indication by monitoring PDCCH in different time slots.

[0220] For example, the number of HARQ processes is increased to 32, the HPN indication field in the DCI uses the existing 4 bits, and the UE monitors the HARQ processes in different HPN ranges in two different time slots. One group of time slots is used to monitor the HARQ processes in the HPN range of 0 to 15, and the other group of time slots is used to monitor the HARQ processes in the HPN range of 16 to 31.

[0221] (4) Implicit indication by monitoring PDCCH on different frequency domain resources.

[0222] For example, the number of HARQ processes is increased to 32, the HPN indication field in the DCI uses the existing 4 bits, and the UE monitors the HARQ processes in different HPN ranges on two different frequency domain resources. One group of frequency domain resources is used to monitor the HARQ processes in the HPN range of 0 to 15, and the other frequency domain resources are used to monitor the HARQ processes in the HPN range of 16 to 31.

[0223] Of course, the present disclosure is not limited to the above-mentioned implementations, and any implementations that combine implicit information and explicit information to jointly indicate HPN fall within the scope of protection of the present disclosure.

[0224] By combining implicit information and explicit information to indicate HPN together, more HARQ processes can be indicated without increasing the size of the HPN indication field.

[0225] It can be understood that when the information related to whether the hybrid automatic repeat request HARQ feedback function is turned off indicates whether the HARQ feedback function is turned off or on, the above-mentioned HARQ process number HPN indication method can be used, that is, the above-mentioned HARQ process number HPN indication method is not limited to use when the HARQ feedback function is turned off.

[0226] Combine the following Fig.12 Next, a method executed by a base station in an embodiment of the present disclosure is introduced. Fig.12 A flowchart of a method performed by a base station according to an embodiment of the present disclosure is shown, and the method may include:

[0227] Step S810: Send information related to whether a hybrid automatic repeat request HARQ feedback function is disabled.

[0228] Step S820: Send downlink control information and a shared channel scheduled by the downlink control information.

[0229] The base station improves the reliability of data transmission by sending information related to whether a hybrid automatic repeat request HARQ feedback function is turned off, and sending downlink control information and a shared channel scheduled by the downlink control information.

[0230] It can be understood that the method performed by the base station is a method on the base station side corresponding to the above-mentioned method for data transmission performed by the terminal. For example, various types of DCI, system information or UE-specific radio resource control RRC signaling or radio resource control RRC signaling or media access control control unit MAC CE or indication information received on the terminal side are all configured or sent by the base station side. In the blind retransmission scheme, under certain conditions, the UE clears the cached data corresponding to the PDSCH. Correspondingly, under certain conditions, the base station also has a corresponding operation of clearing the cached data corresponding to the PUSCH. The specific implementation details and beneficial effects can be referred to the corresponding description in the above-mentioned method for data transmission performed by the terminal, which will not be repeated here.

[0231] Fig.13 is a block diagram showing a structure of a user terminal 900 according to an embodiment of the present disclosure.

[0232] refer to Fig.13 , the user terminal 900 includes a transceiver 910 and a processor 920. The transceiver 910 is configured to send signals to the outside and receive signals from the outside. The processor 920 is configured to execute any of the methods performed by the user terminal above. The user terminal 900 can be implemented in the form of hardware, software, or a combination of hardware and software so that it can execute the above data transmission method described in the present disclosure.

[0233] Fig.14 is a block diagram showing the structure of a base station 1000 according to an embodiment of the present disclosure.

[0234] refer to Fig.14 , the base station 1000 includes a transceiver 1010 and a processor 1020. The transceiver 1010 is configured to send signals to the outside and receive signals from the outside. The processor 1020 is configured to execute any of the methods performed by the base station above. The base station 1000 can be implemented in the form of hardware, software, or a combination of hardware and software so that it can execute the above-mentioned data transmission method described in the present disclosure.

[0235] At least one embodiment of the present disclosure also provides a non-transitory computer-readable recording medium having stored thereon a program for executing the above method when executed by a computer.

[0236] According to one aspect of the present disclosure, a method performed by a user terminal UE is provided, the method comprising: receiving information related to whether a hybrid automatic repeat request HARQ feedback function is turned off; based on the information, receiving downlink control information and a shared channel scheduled by the downlink control information.

[0237] According to the method performed by the user terminal UE provided in the present disclosure, when the information indicates that the HARQ feedback function is turned off, the receiving of downlink control information includes: receiving downlink control information DCI for scheduling a physical downlink shared channel PDSCH or a physical uplink shared channel PUSCH; receiving a DCI for scheduling blind retransmission of PDSCH or PUSCH at least once at the earliest within a time interval less than the round-trip time RTT since receiving the DCI for scheduling PDSCH or PUSCH.

[0238] The method performed by the user terminal UE according to the present disclosure also includes: receiving system information, wherein the system information is used to indicate a blind retransmission configuration, or is used to indicate the blind retransmission configuration of each hybrid automatic repeat request HARQ process respectively; or receiving UE-specific radio resource control RRC signaling, wherein the UE-specific RRC signaling is used to indicate the blind retransmission configuration of the UE, or is used to indicate the blind retransmission configuration of each hybrid automatic repeat request HARQ process of the UE respectively.

[0239] According to the method performed by the user terminal UE provided by the present disclosure, only the HARQ process with the HARQ feedback function turned off is configured to be able to perform blind retransmission, or is able to perform blind retransmission by default.

[0240] According to the method provided by the present disclosure and executed by the user terminal UE, the DCI used for scheduling PDSCH or PUSCH contains a field for indicating whether there is a blind retransmission after the scheduled PDSCH or PUSCH; the method also includes: if the DCI used for scheduling PDSCH or PUSCH indicates that there is no blind retransmission after the scheduled PDSCH or PUSCH, then regardless of whether the PDSCH or PUSCH is successfully decoded, the cached data corresponding to the PDSCH or PUSCH is cleared; if the DCI used for scheduling PDSCH or PUSCH indicates that there is a blind retransmission after the scheduled PDSCH or PUSCH and the PDSCH is not successfully decoded, then the cached data corresponding to the PDSCH is retained, wherein the scheduled PDSCH or PUSCH includes the initial transmission or blind retransmission of the scheduled PDSCH or PUSCH.

[0241] According to the method provided by the present disclosure and executed by the user terminal UE, the DCI used for scheduling PDSCH or PUSCH contains a number of blind retransmissions after the scheduled PDSCH or PUSCH; the method also includes: if the DCI used for scheduling PDSCH indicates that the number of blind retransmissions after the scheduled PDSCH is 0, then regardless of whether the PDSCH is successfully decoded, the cached data corresponding to the PDSCH is cleared; if the DCI used for scheduling PUSCH indicates that the number of blind retransmissions after the scheduled PUSCH is 0, then the cached data corresponding to the PUSCH is cleared after sending the PUSCH.

[0242] According to the method performed by the user terminal UE provided by the present disclosure, the number of blind retransmissions or the maximum number of blind retransmissions of the PDSCH is a predefined value, or a value configured by radio resource control RRC signaling or a medium access control control element MAC CE.

[0243] The method performed by the user terminal UE according to the present disclosure further includes: when the number of blind retransmissions received for the PDSCH reaches a maximum number of retransmissions, sending a hybrid automatic repeat request HARQ feedback to the base station.

[0244] According to the method performed by the user terminal UE provided by the present disclosure, the number of blind retransmissions or the maximum number of blind retransmissions is configured separately for each automatic repeat request HARQ process.

[0245] The method performed by the user terminal UE according to the present disclosure also includes: when the number of blind retransmissions of the received PDSCH reaches the maximum number of blind retransmissions, the cached data corresponding to the PDSCH is cleared regardless of whether the PDSCH is successfully decoded; or when the number of blind retransmissions of the received PUSCH reaches the maximum number of blind retransmissions, the cached data corresponding to the PUSCH is cleared after the last blind retransmission of the PUSCH is sent.

[0246] The method performed by a user terminal UE according to the present disclosure also includes: receiving at least one of the following indication information: information indicating the time interval between a DCI used to schedule a PDSCH or PUSCH and a DCI used to schedule blind retransmission of the PDSCH or PUSCH, a first minimum time interval, or a first maximum time interval; information indicating the time interval between the PDSCH or PUSCH and the DCI used to schedule blind retransmission of the PDSCH or PUSCH, a second minimum time interval, or a second maximum time interval; information indicating the time interval between the PDSCH or PUSCH and the blind retransmission of the PDSCH or PUSCH, a third minimum time interval, or a third maximum time interval; information indicating a time window for monitoring the blind retransmission of the PDSCH or PUSCH, wherein the starting position of the time window is the position of a predefined or preconfigured interval after the DCI used to schedule the PDSCH or PUSCH, or the position of a predefined or preconfigured interval after the PDSCH or PUSCH; wherein at least one of the indication information is indicated by a DCI used to schedule PDSCH or PUSCH, a radio resource control RRC signaling, or a media access control control unit MAC CE.

[0247] The method performed by the user terminal UE according to the present disclosure also includes: if the UE does not receive the DCI for scheduling the blind retransmission of the PDSCH or PUSCH within the first maximum time interval from the reception of the DCI for scheduling the PDSCH or PUSCH; or, if the DCI for scheduling the blind retransmission of the PDSCH is not received within the second maximum time interval from the PDSCH; or, if the blind retransmission of the PDSCH is not received within the third maximum time interval from the PDSCH; or, if the blind retransmission of the PDSCH is not monitored within the time window for monitoring the blind retransmission of the PDSCH; then the cached data corresponding to the PDSCH or PUSCH is cleared.

[0248] According to the method provided by the present disclosure and executed by the user terminal UE, when the information indicates that the HARQ feedback function is turned off or on, the receiving of downlink control information includes: receiving downlink control information DCI for scheduling a physical downlink shared channel PDSCH or a physical uplink shared channel PUSCH, wherein the DCI for scheduling PDSCH or PUSCH contains a field for indicating the number of time slots for the scheduled PDSCH or PUSCH time slot aggregation transmission, wherein the size of the field for indicating the number of time slots for the scheduled PDSCH or PUSCH time slot aggregation transmission in the DCI for scheduling PDSCH or PUSCH is determined by the maximum number of time slots for the scheduled PDSCH or PUSCH time slot aggregation transmission, and the maximum number of time slots is configured via radio resource control RRC signaling or media access control control unit MAC CE.

[0249] According to the method performed by the user terminal UE provided in the present disclosure, the maximum number of time slots is configured separately for at least one of each service quality QoS of PDSCH or PUSCH, each hybrid automatic repeat request HARQ process of PDSCH or PUSCH, each logical channel of PDSCH or PUSCH, each priority of PDSCH or PUSCH, each scheduling method of PDSCH or PUSCH, and whether the HARQ feedback function of PDSCH or PUSCH is turned on, wherein the scheduling method includes dynamic scheduling and semi-static scheduling.

[0250] According to the method performed by the user terminal UE provided by the present disclosure, the multiple time slots used for the scheduled PDSCH or PUSCH time slot aggregation transmission are discontinuous.

[0251] According to the method performed by the user terminal UE provided in the present disclosure, there is the same interval between each time slot or each time slot cluster in multiple time slots used for the scheduled PDSCH or PUSCH time slot aggregation transmission, and the time slot cluster refers to two or more than two consecutive time slots.

[0252] According to the method performed by the user terminal UE provided in the present disclosure, it also includes: receiving at least one of the following indication information: information indicating whether there is an interval between each time slot or each time slot cluster in the multiple time slots used for the scheduled PDSCH or PUSCH time slot aggregation transmission; information indicating the size of the interval between each time slot or each time slot cluster in the multiple time slots used for the scheduled PDSCH or PUSCH time slot aggregation transmission; wherein at least one of the indication information is configured by the DCI, radio resource control RRC signaling or media access control control unit MAC CE used to schedule PDSCH or PUSCH. According to the method performed by the user terminal UE provided in the present disclosure, wherein there is the same interval between each time slot or each time slot cluster in the multiple time slots used for PDSCH time slot aggregation transmission, and the time slot cluster refers to two or more consecutive time slots.

[0253] According to the method performed by the user terminal UE provided by the present disclosure, the size of the time slot cluster is configured through DCI, radio resource control RRC signaling or medium access control control element MAC CE for scheduling PDSCH or PUSCH.

[0254] The method performed by the user terminal UE according to the present disclosure also includes: when the time slot used for the scheduled PDSCH or PUSCH time slot aggregation transmission is identified as an unavailable time slot, the UE discards the signal that should be mapped to the time slot or maps it to the next available time slot.

[0255] According to the method provided by the present disclosure and executed by the user terminal UE, wherein the information related to whether the hybrid automatic repeat request HARQ feedback function is turned off is related to the HARQ process number HPN, the method also includes: based on the HARQ process number HPN, determining whether the HARQ feedback function of the corresponding HARQ process is turned off, wherein the PDSCH transmission with the HARQ feedback function turned on and the PDSCH transmission with the HARQ feedback function turned off use different HARQ processes.

[0256] According to the method performed by the user terminal UE provided by the present disclosure, the maximum number of HARQ processes with the HARQ feedback function disabled is N-1, where N is the total number of HARQ processes.

[0257] According to the method performed by the user terminal UE provided by the present disclosure, the HARQ feedback function is enabled by default for the HARQ process with an HPN indication value of 0 or N-1.

[0258] According to the method performed by the user terminal UE provided by the present disclosure, the PDSCH transmission with the HARQ feedback function turned off occupies only one downlink DL HARQ process.

[0259] According to the method performed by the user terminal UE provided in the present disclosure, when the HARQ process with the downlink DL HARQ feedback function turned off or on is used for semi-static scheduling of SPS PDSCH transmission, whether HARQ feedback needs to be performed is determined based on the on or off configuration of the HARQ feedback function corresponding to the SPS PDSCH.

[0260] According to the method performed by the user terminal UE provided by the present disclosure, wherein, the HARQ process number HPN includes explicit information and implicit information, the explicit information is indicated by the field for indicating HPN contained in the received DCI, and the implicit information is indicated by at least one of the following methods: implicitly indicating by monitoring PDCCH using different cell radio network temporary identifier C-RNTI values; implicitly indicating by monitoring the physical downlink control channel PDCCH in different PDCCH search spaces; implicitly indicating by monitoring PDCCH in different time slots; implicitly indicating by monitoring PDCCH in different frequency domain resources.

[0261] The method performed by the user terminal UE according to the present disclosure also includes: wherein the information related to whether the hybrid automatic repeat request HARQ feedback function is turned off includes at least one of the following information: information indicating the number of downlink DL HARQ processes in which the hybrid automatic repeat request HARQ feedback function is turned off; information indicating the number of DL HARQ processes in which the HARQ feedback function is turned on; information indicating the total number of DL HARQ processes; wherein at least one of the information is configured through radio resource control RRC signaling or media access control control unit MAC CE.

[0262] According to the method performed by the user terminal UE provided by the present disclosure, the DL HARQ process with the HARQ feedback function enabled uses consecutive HARQ process numbers, and increases from the smallest HARQ process number or decreases from the largest HARQ process number.

[0263] According to the method provided by the present disclosure and executed by the user terminal UE, the information related to whether the hybrid automatic repeat request HARQ feedback function is turned off includes: information indicating whether each downlink DL HARQ process supports HARQ feedback, wherein the information is configured through radio resource control RRC signaling or media access control control unit MACCE.

[0264] According to the method provided by the present disclosure and performed by the user terminal UE, the receiving of information related to whether the hybrid automatic repeat request HARQ feedback function is turned off includes: receiving radio resource control RRC signaling or media access control control unit MAC CE for configuring the downlink DL HARQ process in which the HARQ feedback function is turned off; in the DL HARQ process, receiving downlink control information DCI containing information for indicating whether the current PDSCH transmission needs to perform HARQ feedback.

[0265] According to the method performed by the user terminal UE provided by the present disclosure, the information related to whether the hybrid automatic repeat request HARQ feedback function is turned off includes a DCI for scheduling a PDSCH with the HARQ feedback function turned on and a DCI for scheduling a PDSCH with the HARQ feedback function turned off, and both have the same DCI format, and the method also includes: determining whether the corresponding PDSCH needs to perform HARQ feedback by at least one of the following methods: determining whether the corresponding PDSCH needs to perform HARQ feedback by monitoring the physical downlink control channel PDCCH using different cell radio network temporary identifier C-RNTI values; or determining whether the corresponding PDSCH needs to perform HARQ feedback by monitoring the PDCCH in different PDCCH search spaces; or determining whether the corresponding PDSCH needs to perform HARQ feedback by monitoring the PDCCH in different time slots; or determining whether the corresponding PDSCH needs to perform HARQ feedback by monitoring the PDCCH in different frequency domain resources; or determining whether the corresponding PDSCH needs to perform HARQ feedback by the HARQ process number HPN; or determining whether the corresponding PDSCH needs to perform HARQ feedback by a specific field included in the DCI for scheduling the PDSCH.

[0266] According to the method provided by the present disclosure and executed by the user terminal UE, the information related to whether the hybrid automatic repeat request HARQ feedback function is turned off includes a DCI for scheduling a PDSCH with the HARQ feedback function turned on and a DCI for scheduling a PDSCH with the HARQ feedback function turned off, and the two have different DCI formats. The method also includes: the UE determines whether the corresponding PDSCH needs to perform HARQ feedback based on the monitored DCI format.

[0267] According to one aspect of the present disclosure, a method for indicating a HARQ process number HPN is provided, wherein the HPN includes explicit information and implicit information, the explicit information is indicated by a field for indicating the HPN contained in the downlink control information DCI, and the implicit information is indicated in at least one of the following ways: implicitly indicating by monitoring the PDCCH using different cell radio network temporary identifier C-RNTI values; implicitly indicating by monitoring the physical downlink control channel PDCCH in different PDCCH search spaces; implicitly indicating by monitoring the PDCCH in different time slots; or implicitly indicating by monitoring the PDCCH in different frequency domain resources.

[0268] According to one aspect of the present disclosure, a method performed by a base station is provided, the method comprising sending information related to whether a hybrid automatic repeat request HARQ feedback function is turned off; sending downlink control information and a shared channel scheduled by the downlink control information.

[0269] According to another aspect of the present disclosure, a terminal is provided, comprising: a transceiver configured to send and receive signals to and from the outside; and a processor configured to control the transceiver to execute any one of the above methods executed by the user terminal.

[0270] According to another aspect of the present disclosure, a base station is provided, comprising: a transceiver configured to send and receive signals to and from the outside; and a processor configured to control the transceiver to execute any one of the methods executed by the above-mentioned base station.

[0271] According to another aspect of the present disclosure, a non-transitory computer-readable recording medium is provided, on which a program for executing any of the above methods when executed by a computer is stored.

Claims

1. A method performed by a user terminal UE, the method include: Receiving first information related to whether HARQ feedback of a hybrid automatic repeat request HARQ process is disabled; receiving a physical downlink shared channel PDSCH of the HARQ process; and When the first information indicates that the HARQ feedback of the HARQ process is turned off, after the time interval from the end of receiving the PDSCH, the first downlink control information DCI of another PDSCH scheduling the HARQ process and / or another PDSCH of the HARQ process is received; wherein the size of the time interval is related to the processing time of the PDSCH.

2. The method according to claim 1, in, The size of the time interval is predefined or configured.

3. The method according to claim 1, in, The first information is received through UE-specific radio resource control RRC signaling and / or a third DCI scheduling the PDSCH.

4. The method according to claim 1, in, The PDSCH includes a slot-aggregated PDSCH.

5. The method according to claim 1 or 3, in, The first information is configured based on each HARQ process.

6. The method according to claim 1, in, The method further comprises: receiving second information related to whether HARQ feedback of semi-persistent persistent scheduling SPS PDSCH is disabled; In a case where the HARQ process is used for the SPS PDSCH, determining whether HARQ feedback of the SPS PDSCH is turned off based on the second information; The second information is configured through UE-specific RRC signaling.

7. The method according to claim 6, in, The method further comprises: In the case where the second information indicates that the HARQ feedback of the SPS PDSCH is turned off, the HARQ-ACK information corresponding to the activation DCI and / or release DCI feedback of the SPS PDSCH is still fed back.

8. The method according to claim 6, in, The method further comprises: In a case where the second information is not provided, determining whether the HARQ feedback of the SPS PDSCH is disabled based on the first information.

9. The method according to claim 1 or 3, in, The method further comprises: receiving a second DCI and a PDSCH scheduled by the second DCI, wherein the second DCI includes third information related to whether HARQ feedback is disabled; Based on the third information, it is determined whether HARQ feedback of the PDSCH scheduled by the second DCI is turned off.

10. A method performed by a base station, the method include: Sending first information related to whether HARQ feedback of a hybrid automatic repeat request HARQ process is disabled to a user equipment UE; Sending a physical downlink shared channel PDSCH of the HARQ process to the UE; and When the first information indicates that HARQ feedback of the HARQ process is turned off, after a time interval from the end of sending the PDSCH, sending first downlink control information DCI scheduling another PDSCH of the HARQ process and / or another PDSCH of the HARQ process to the UE; The size of the time interval is related to the processing time of the PDSCH.

11. The method according to claim 10, in, The size of the time interval is predefined or configured.

12. The method according to claim 10, in, The first information is sent through UE-specific radio resource control RRC signaling and / or a third DCI that schedules the PDSCH.

13. The method according to claim 10, in, The PDSCH includes a slot-aggregated PDSCH.

14. The method according to claim 10 or 12, in, The first information is configured based on each HARQ process.

15. The method according to claim 10, in, The method further comprises: Sending second information related to whether HARQ feedback of semi-persistent persistent scheduling SPS PDSCH is turned off; In a case where the HARQ process is used for the SPS PDSCH, determining whether to receive HARQ feedback of the SPS PDSCH based on the second information; The second information is used by the UE to determine whether the HARQ feedback of the SPS PDSCH is disabled, and the second information is configured through UE-specific RRC signaling.

16. The method according to claim 15, in, The method further comprises: In the case where the second information indicates that the HARQ feedback of the SPS PDSCH is turned off, the corresponding HARQ-ACK information of the activation DCI and / or release DCI feedback of the SPS PDSCH is still received.

17. The method according to claim 15, in, The method further comprises: In a case where the second information is not provided to the UE, determining whether to receive HARQ feedback of the SPS PDSCH based on the first information.

18. The method according to claim 10 or 12, further comprising: include: Sending a second DCI and a PDSCH scheduled by the second DCI, wherein the second DCI includes third information related to whether HARQ feedback is turned off; Determine whether to receive HARQ feedback of the PDSCH scheduled by the second DCI based on the third information; The third information is used by the UE to determine whether the HARQ feedback of the PDSCH scheduled by the second DCI is turned off.

19. A user equipment UE in a communication system, the UE include: Transceiver; as well as A controller is coupled to the transceiver and configured to perform the method according to any one of claims 1-9.

20. A base station in a communication system, the base station include: Transceiver; as well as A controller is coupled to the transceiver and configured to perform the method according to any one of claims 10-18.

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