A method and apparatus for determining a transmission beam of a Physical Downlink Shared Channel (PDSCH)

Abstract

The present application discloses a method and apparatus for determining a transmission beam of a Physical Downlink Shared Channel (PDSCH), relating to the field of wireless communication technologies. The specific implementation solution is as follows: receiving Downlink Control Information (DCI), where the DCI is used to schedule multiple PDSCHs; determining the time domain interval between the PDSCH and the DCI among the multiple PDSCHs; and determining the transmission beam used by the PDSCH according to the time domain interval. Thereby, it is achieved to determine the transmission beam used by the PDSCH according to the relationship between the DCI and the multiple PDSCHs it schedules, which can avoid losing the gain of DMRS joint channel estimation and the gain of receiving the PDSCH on the beam of the DCI, and improve the signal transmission efficiency.

Description

Technical Field

[0001] This application relates to the field of wireless communication technologies, and particularly to a method and apparatus for determining a transmission beam of a physical downlink shared channel (PDSCH). Background Art

[0002] In the scenario of a physical downlink shared channel (PDSCH) in which a single downlink control information (DCI) schedules multiple transport blocks (TBs) for high-frequency transmission, for each PDSCH among multiple PDSCHs scheduled by the same DCI, there is currently a lack of a method for determining the transmission beam used by the PDSCH when one DCI schedules multiple PDSCHs. Summary of the Invention

[0003] The present disclosure provides a method, apparatus, device, and storage medium for determining a transmission beam of a physical downlink shared channel (PDSCH).

[0004] Determining the transmission beam used by the PDSCH through the relationship between the DCI and multiple PDSCHs scheduled by it can avoid loss of the DMRS joint channel estimation gain and the gain of receiving the PDSCH on the beam of the DCI, and improve the signal transmission efficiency.

[0005] According to a first aspect of the present disclosure, there is provided a method for determining a transmission beam of a physical downlink shared channel (PDSCH), which is applied to a base station and characterized in that the method includes: receiving a downlink control information (DCI), where the DCI is used to schedule multiple PDSCHs; determining a time domain interval between the PDSCH and the DCI among the multiple PDSCHs; and determining the transmission beam used by the PDSCH according to the time domain interval.

[0006] In this technical solution, determining the transmission beam used by the PDSCH through the relationship between the DCI and multiple PDSCHs scheduled by it can avoid loss of the DMRS joint channel estimation gain and the gain of receiving the PDSCH on the beam of the DCI.

[0007] Optionally, the time domain interval is the number of orthogonal frequency division multiplexing (OFDM) symbols by which the DCI and the PDSCH are separated in the time domain.

[0008] Optionally, determining the transmission beam used for the PDSCH according to the time domain interval includes: If the time domain interval is less than the quasi-co-location duration TimeDurationForQCL, and the PDSCH is the first PDSCH in the time domain scheduled by the DCI, then use the transmission beam of the control resource set CORESET that is closest to the PDSCH and has the smallest ID as the transmission beam used for the PDSCH.

[0009] If the time domain interval is less than the quasi-co-location duration TimeDurationForQCL, and the PDSCH is not the first PDSCH in the time domain scheduled by the DCI, then use the transmission beam of the first PDSCH in the time domain scheduled by the DCI as the transmission beam used for the PDSCH.

[0010] If the time domain interval is less than the TimeDurationForQCL, and the PDSCH is the first PDSCH in the time domain scheduled by the DCI, and there is a conversion interval symbol before the PDSCH data, and the sum of the time domain interval and the conversion interval symbol is greater than or equal to the TimeDurationForQCL, then use the transmission beam of the DCI as the transmission beam of the PDSCH.

[0011] Optionally, determining the transmission beam used for the PDSCH according to the time domain interval includes: If the time domain interval is greater than or equal to the TimeDurationForQCL, and the PDSCH is the first PDSCH in the time domain scheduled by the DCI, then use the transmission beam of the DCI as the transmission beam used for the PDSCH.

[0012] If the time domain interval is greater than or equal to the TimeDurationForQCL, and the PDSCH is not the first PDSCH in the time domain scheduled by the DCI, then determine the transmission beam used for the PDSCH according to the difference information between the PDSCH and the previous PDSCH with the smallest time domain interval from the PDSCHs scheduled by the DCI.

[0013] Optionally, determining the transmission beam used for the PDSCH according to the difference information between the PDSCH scheduled by the DCI and the previous PDSCH with the smallest time domain interval from the PDSCH in the PDSCH scheduled by the DCI includes: determining whether the transmission beam of the DCI is the same as the transmission beam used for the previous PDSCH with the smallest time domain interval from the PDSCH in the PDSCH scheduled by the DCI; determining whether the time domain interval between the PDSCH and the previous PDSCH with the smallest time domain interval from the PDSCH in the PDSCH scheduled by the DCI is greater than or equal to n OFDM symbols or n milliseconds, where n is the number of OFDM symbols or the millisecond threshold; determining whether the carrier of the PDSCH is the same as the carrier of the previous PDSCH with the smallest time domain interval from the PDSCH in the PDSCH scheduled by the DCI; and obtaining the transmission beam of the PDSCH.

[0014] Optionally, obtaining the transmission beam of the PDSCH includes: if the transmission beam of the DCI is the same as the transmission beam used for the previous PDSCH with the smallest time domain interval from the PDSCH in the PDSCH scheduled by the DCI, and the time domain interval between the PDSCH and the previous PDSCH with the smallest time domain interval from the PDSCH in the PDSCH scheduled by the DCI is less than n OFDM symbols or n milliseconds, and the carrier of the PDSCH is the same as the carrier of the previous PDSCH with the smallest time domain interval from the PDSCH in the PDSCH scheduled by the DCI, then using the transmission beam of the first PDSCH in the PDSCH scheduled by the DCI as the transmission beam of the PDSCH, where n is a positive integer; otherwise, using the transmission beam indicated by the DCI as the transmission beam of the PDSCH.

[0015] Optionally, after receiving the downlink control information DCI, it further includes: determining whether there is a PDCCH overlapping with the PDSCH in the time domain; if there is a PDCCH overlapping with the PDSCH in the time domain, using the transmission beam of the PDCCH as the transmission beam of the PDSCH.

[0016] Optionally, determining the transmission beam used for the PDSCH according to the time domain interval includes: determining whether multiple transmission configuration indicators (TCIs) are indicated in the DCI, where the multiple TCIs correspond to one or more PDSCHs in the PDSCH scheduled by the DCI; if multiple TCIs are indicated in the DCI, and the time domain interval is greater than or equal to the TimeDurationForQCL, and the PDSCH is the first PDSCH in the time domain scheduled by the DCI, then using the transmission beam of the TCI corresponding to the PDSCH in the DCI as the transmission beam of the PDSCH.

[0017] If multiple TCIs are indicated in the DCI, the time domain interval is greater than or equal to the TimeDurationForQCL, and the PDSCH is not the first PDSCH in the time domain scheduled by the DCI, then the transmission beam used for the PDSCH is determined according to the difference information between the PDSCH and the previous PDSCH with the smallest time domain interval from the PDSCH among the PDSCHs scheduled by the DCI.

[0018] Optionally, determining the transmission beam used for the PDSCH according to the difference information between the PDSCH and the previous PDSCH with the smallest time domain interval from the PDSCH among the PDSCHs scheduled by the DCI includes: determining whether the transmission beam of the DCI is the same as the transmission beam used for the previous PDSCH with the smallest time domain interval from the PDSCH among the PDSCHs scheduled by the DCI; determining whether the time domain interval between the PDSCH and the previous PDSCH with the smallest time domain interval from the PDSCH among the PDSCHs scheduled by the DCI is greater than or equal to n OFDM symbols or n milliseconds, where n is the number of OFDM symbols or the millisecond threshold; determining whether the carrier of the PDSCH is the same as the carrier of the previous PDSCH with the smallest time domain interval from the PDSCH among the PDSCHs scheduled by the DCI; and obtaining the transmission beam of the PDSCH.

[0019] Optionally, obtaining the transmission beam of the PDSCH includes: if the transmission beam of the DCI is the same as the transmission beam used for the previous PDSCH with the smallest time domain interval from the PDSCH among the PDSCHs scheduled by the DCI, the time domain interval between the PDSCH and the previous PDSCH with the smallest time domain interval from the PDSCH among the PDSCHs scheduled by the DCI is less than n OFDM symbols or n milliseconds, and the carrier of the PDSCH is the same as the carrier of the previous PDSCH with the smallest time domain interval from the PDSCH among the PDSCHs scheduled by the DCI, then the transmission beam of the first PDSCH among the PDSCHs scheduled by the DCI is used as the transmission beam of the PDSCH; otherwise, the transmission beam of the TCI corresponding to the PDSCH in the DCI is used as the transmission beam of the PDSCH.

[0020] Optionally, determining the transmission beam used for the PDSCH according to the time domain interval includes: determining whether there is a TCI field in the DCI; if there is no TCI field in the DCI, and the time domain interval is greater than or equal to the TimeDurationForQCL, and the PDSCH is the first PDSCH in the time domain scheduled by the DCI, then using the beam of the TCI with the smallest activated ID available for the PDSCH in the activated subset bandwidth BWP of the scheduling cell as the transmission beam of the PDSCH; if there is no TCI field in the DCI, and the time domain interval is greater than or equal to the TimeDurationForQCL, and the PDSCH is not the first PDSCH in the time domain scheduled by the DCI, then determining the transmission beam used for the PDSCH according to the difference information between the PDSCH and the previous PDSCH with the smallest time domain interval from the PDSCH among the PDSCHs scheduled by the DCI.

[0021] Optionally, determining the transmission beam used for the PDSCH according to the difference information between the PDSCH and the previous PDSCH with the smallest time domain interval from the PDSCH among the PDSCHs scheduled by the DCI includes: determining whether the transmission beam of the DCI is the same as the transmission beam used for the previous PDSCH with the smallest time domain interval from the PDSCH among the PDSCHs scheduled by the DCI; determining whether the time domain interval between the PDSCH and the previous PDSCH with the smallest time domain interval from the PDSCH among the PDSCHs scheduled by the DCI is greater than or equal to n OFDM symbols or n milliseconds, where n is the number of OFDM symbols or the millisecond threshold; determining whether the carrier of the PDSCH is the same as the carrier of the previous PDSCH with the smallest time domain interval from the PDSCH among the PDSCHs scheduled by the DCI; and obtaining the transmission beam of the PDSCH.

[0022] Optionally, obtaining the transmission beam of the PDSCH includes: if the transmission beam of the DCI is the same as the transmission beam used for the previous PDSCH with the smallest time domain interval from the PDSCH among the PDSCHs scheduled by the DCI, and the time domain interval between the PDSCH and the previous PDSCH with the smallest time domain interval from the PDSCH among the PDSCHs scheduled by the DCI is less than n OFDM symbols or n milliseconds, and the carrier of the PDSCH is the same as the carrier of the previous PDSCH with the smallest time domain interval from the PDSCH among the PDSCHs scheduled by the DCI, then using the transmission beam of the first PDSCH among the PDSCHs scheduled by the DCI as the transmission beam of the PDSCH; otherwise, using the beam of the TCI with the smallest activated ID available for the PDSCH in the activated subset bandwidth BWP of the scheduling cell as the transmission beam of the PDSCH.

[0023] According to a second aspect of the present disclosure, there is provided an apparatus for determining a transmission beam of a Physical Downlink Shared Channel (PDSCH), which is applied to a base station. The apparatus is characterized by comprising a memory, a transceiver, and a processor:

[0024] The memory is used for storing a computer program; the transceiver is used for transceiving data under the control of the processor; the processor is used for reading the computer program in the memory and performing the following operations: receiving Downlink Control Information (DCI), where the DCI is used for scheduling multiple PDSCHs; determining a time domain interval between the PDSCH and the DCI among the multiple PDSCHs; and determining a transmission beam used for the PDSCH according to the time domain interval.

[0025] In this technical solution, determining the transmission beam used for the PDSCH through the relationship between the DCI and the multiple PDSCHs it schedules can avoid losing the DMRS joint channel estimation gain and the gain of receiving the PDSCH on the beam of the DCI.

[0026] Optionally, the time domain interval is the number of Orthogonal Frequency Division Multiplexing (OFDM) symbols by which the DCI and the PDSCH are separated in the time domain.

[0027] Optionally, the determining the transmission beam used for the PDSCH according to the time domain interval includes: if the time domain interval is less than the Quasi-Co-Location duration TimeDurationForQCL, and the PDSCH is the first PDSCH in the time domain scheduled by the DCI, then using the transmission beam of the Control Resource Set (CORESET) that is closest to the PDSCH and has the smallest ID as the transmission beam used for the PDSCH.

[0028] If the time domain interval is less than the Quasi-Co-Location duration TimeDurationForQCL, and the PDSCH is not the first PDSCH in the time domain scheduled by the DCI, then using the transmission beam of the first PDSCH in the time domain scheduled by the DCI as the transmission beam used for the PDSCH.

[0029] If the time domain interval is less than the TimeDurationForQCL, and the PDSCH is the first PDSCH in the time domain scheduled by the DCI, and there is a transition interval symbol before the PDSCH data, and the sum of the time domain interval and the transition interval symbol is greater than or equal to the TimeDurationForQCL, then using the transmission beam of the DCI as the transmission beam of the PDSCH.

[0030] Optionally, determining the transmission beam used for the PDSCH according to the time domain interval includes: if the time domain interval is greater than or equal to the TimeDurationForQCL, and the PDSCH is the first PDSCH in the time domain scheduled by the DCI, then using the transmission beam of the DCI as the transmission beam of the PDSCH.

[0031] If the time domain interval is greater than or equal to the TimeDurationForQCL, and the PDSCH is not the first PDSCH in the time domain scheduled by the DCI, then determine the transmission beam used for the PDSCH according to the difference information between the PDSCH and the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI.

[0032] Optionally, determining the transmission beam used for the PDSCH according to the difference information between the PDSCH and the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI includes: determining whether the transmission beam of the DCI is the same as the transmission beam used for the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI; determining whether the time domain interval between the PDSCH and the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI is greater than or equal to n OFDM symbols or n milliseconds, where n is the number of OFDM symbols or the millisecond threshold; determining whether the carrier of the PDSCH is the same as the carrier of the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI; obtaining the transmission beam of the PDSCH.

[0033] Optionally, obtaining the transmission beam of the PDSCH includes: if the transmission beam of the DCI is the same as the transmission beam used for the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI, and the time domain interval between the PDSCH and the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI is less than n OFDM symbols or n milliseconds, and the carrier of the PDSCH is the same as the carrier of the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI, then using the transmission beam of the first PDSCH among the PDSCHs scheduled by the DCI as the transmission beam of the PDSCH, where n is a positive integer; otherwise, using the transmission beam indicated by the DCI as the transmission beam of the PDSCH.

[0034] Optionally, after receiving the downlink control information DCI, it further includes: determining whether there is a PDCCH overlapping with the PDSCH in the time domain; if there is a PDCCH overlapping with the PDSCH in the time domain, using the transmission beam of the PDCCH as the transmission beam of the PDSCH.

[0035] Optionally, determining the transmission beam used by the PDSCH according to the time domain interval includes: determining whether multiple transmission configuration indicators TCIs are indicated in the DCI, where the multiple TCIs correspond to one or more PDSCHs in the PDSCH scheduled by the DCI; if multiple TCIs are indicated in the DCI, and the time domain interval is greater than or equal to the TimeDurationForQCL, and the PDSCH is the first PDSCH in the time domain scheduled by the DCI, then using the transmission beam of the TCI corresponding to the PDSCH in the DCI as the transmission beam of the PDSCH.

[0036] If multiple TCIs are indicated in the DCI, and the time domain interval is greater than or equal to the TimeDurationForQCL, and the PDSCH is not the first PDSCH in the time domain scheduled by the DCI, then determining the transmission beam used by the PDSCH according to the difference information between the PDSCH and the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI.

[0037] Optionally, determining the transmission beam used by the PDSCH according to the difference information between the PDSCH and the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI includes: determining whether the transmission beam of the DCI is the same as the transmission beam used by the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI; determining whether the time domain interval between the PDSCH and the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI is greater than or equal to n OFDM symbols or n milliseconds, where n is the number of OFDM symbols or the millisecond threshold; determining whether the carrier of the PDSCH is the same as the carrier of the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI; obtaining the transmission beam of the PDSCH.

[0038] Optionally, obtaining the transmission beam of the PDSCH includes: If the transmission beam of the DCI is the same as the transmission beam used by the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI, and the time domain interval between the PDSCH and the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI is less than n OFDM symbols or n milliseconds, and the carrier of the PDSCH is the same as the carrier of the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI, then use the transmission beam of the first PDSCH among the PDSCHs scheduled by the DCI as the transmission beam of the PDSCH; otherwise, use the transmission beam of the TCI corresponding to the PDSCH in the DCI as the transmission beam of the PDSCH.

[0039] Optionally, determining the transmission beam used by the PDSCH according to the time domain interval includes: determining whether there is a TCI field in the DCI; if there is no TCI field in the DCI, and the time domain interval is greater than or equal to the TimeDurationForQCL, and the PDSCH is the first PDSCH in the time domain scheduled by the DCI, then use the beam of the TCI with the smallest activated ID available for the PDSCH in the activated subset bandwidth BWP of the scheduling cell as the transmission beam of the PDSCH; if there is no TCI field in the DCI, and the time domain interval is greater than or equal to the TimeDurationForQCL, and the PDSCH is not the first PDSCH in the time domain scheduled by the DCI, then determine the transmission beam used by the PDSCH according to the difference information between the PDSCH and the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI.

[0040] Optionally, determining the transmission beam used by the PDSCH according to the difference information between the PDSCH and the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI includes: determining whether the transmission beam of the DCI is the same as the transmission beam used by the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI; determining whether the time domain interval between the PDSCH and the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI is greater than or equal to n OFDM symbols or n milliseconds, where n is the number of OFDM symbols or the millisecond threshold; determining whether the carrier of the PDSCH is the same as the carrier of the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI; obtaining the transmission beam of the PDSCH.

[0041] Optionally, obtaining the transmission beam of the PDSCH includes: if the transmission beam of the DCI is the same as the transmission beam used by the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI, and the time domain interval between the PDSCH and the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI is less than n OFDM symbols or n milliseconds, and the carrier of the PDSCH is the same as the carrier of the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI, then use the transmission beam of the first PDSCH among the PDSCHs scheduled by the DCI as the transmission beam of the PDSCH; otherwise, use the beam of the TCI with the smallest activated ID available for the PDSCH in the activated subset bandwidth BWP of the scheduling cell as the transmission beam of the PDSCH.

[0042] According to a third aspect of the present disclosure, there is provided an apparatus for determining a transmission beam of a physical downlink shared channel PDSCH, characterized by comprising: a downlink control information receiving unit, configured to receive downlink control information DCI, wherein the DCI is used to schedule a plurality of PDSCHs; a time domain interval obtaining unit, configured to determine a time domain interval between the PDSCH and the DCI among the plurality of PDSCHs; and a transmission beam obtaining unit, configured to determine a transmission beam used by the PDSCH according to the time domain interval.

[0043] According to a fourth aspect of the present disclosure, there is provided a processor-readable storage medium, characterized in that the processor-readable storage medium stores a computer program executable by a processor for executing the method described in the first aspect above.

[0044] In this technical solution, determining the transmission beam used by the PDSCH according to the relationship between the DCI and the plurality of PDSCHs it schedules can avoid losing the DMRS joint channel estimation gain and the gain of receiving the PDSCH on the beam of the DCI.

[0045] The technology according to the present application solves the problem of determining the receiving beam of each PDSCH when a single DCI calls a plurality of PDSCHs, avoids losing the DMRS joint channel estimation gain and the gain of receiving the PDSCH on the beam of the DCI, and improves the transmission efficiency of the signal.

[0046] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present disclosure, nor is it used to limit the scope of the present disclosure. Other features of the present disclosure will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] The accompanying drawings are used to better understand the present solution and do not limit the present application. Among them:

[0048] Figure 1 is a schematic flowchart of a method for determining a physical downlink shared channel (PDSCH) transmission beam according to an embodiment of the present application;

[0049] Figure 2 is a schematic flowchart of a method for determining a physical downlink shared channel (PDSCH) transmission beam according to an embodiment of the present application;

[0050] Figure 3 is a schematic flowchart of a method for determining a physical downlink shared channel (PDSCH) transmission beam according to an embodiment of the present application;

[0051] Figure 4 is a schematic flowchart of a method for determining a physical downlink shared channel (PDSCH) transmission beam according to an embodiment of the present application;

[0052] Figure 5 is a schematic flowchart of a method for determining a physical downlink shared channel (PDSCH) transmission beam according to an embodiment of the present application;

[0053] Figure 6 is a schematic flowchart of a method for determining a physical downlink shared channel (PDSCH) transmission beam according to an embodiment of the present application;

[0054] Figure 7 is a schematic flowchart of a method for determining a physical downlink shared channel (PDSCH) transmission beam according to an embodiment of the present application;

[0055] Figure 8 is a schematic flowchart of a method for determining a physical downlink shared channel (PDSCH) transmission beam according to an embodiment of the present application;

[0056] Figure 9 is a schematic flowchart of a method for determining a physical downlink shared channel (PDSCH) transmission beam according to an embodiment of the present application;

[0057] Figure 10 is a schematic flowchart of a method for determining a physical downlink shared channel (PDSCH) transmission beam according to an embodiment of the present application;

[0058] Figure 11 is a schematic flowchart of a method for determining a physical downlink shared channel (PDSCH) transmission beam according to an embodiment of the present application;

[0059] Figure 12 is a schematic flowchart of a method for determining a physical downlink shared channel (PDSCH) transmission beam according to an embodiment of the present application;

[0060] Figure 13 It is a schematic diagram of a possible embodiment for determining a physical downlink shared channel (PDSCH) transmission beam according to an embodiment of the present application;

[0061] Figure 14 It is a schematic diagram of a possible embodiment for determining a physical downlink shared channel (PDSCH) transmission beam according to an embodiment of the present application;

[0062] Figure 15 It is a schematic diagram of a possible embodiment for determining a physical downlink shared channel (PDSCH) transmission beam according to an embodiment of the present application;

[0063] Figure 16 It is a schematic diagram of a possible embodiment for determining a physical downlink shared channel (PDSCH) transmission beam according to an embodiment of the present application;

[0064] Figure 17 It is a schematic structural diagram of a device for implementing a method for determining a physical downlink shared channel (PDSCH) transmission beam according to an embodiment of the present application;

[0065] Figure 18 It is a schematic structural diagram of a device for implementing a method for determining a physical downlink shared channel (PDSCH) transmission beam according to an embodiment of the present application. Detailed implementation manners

[0066] The following describes exemplary embodiments of the present application with reference to the accompanying drawings. Various details of the embodiments of the present application are included to facilitate understanding, and they should be considered merely exemplary. Therefore, those of ordinary skill in the art should recognize that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present application. Similarly, for clarity and conciseness, descriptions of well-known functions and structures are omitted in the following description.

[0067] The following describes a method, a terminal, a network-side device, a device, and a storage medium for determining a physical downlink shared channel (PDSCH) transmission beam according to an embodiment of the present application with reference to the accompanying drawings.

[0068] Currently, the 5G new radio air interface supports the physical downlink shared channel (PDSCH) where a single downlink control information (DCI) schedules multiple transport blocks (TBs). There are two methods for determining the receiving beam used for each PDSCH scheduled by a single DCI. Method 1: Make the receiving beams used for all PDSCHs the same as the receiving beam used for the first PDSCH in the time domain. Method 2: Obtain the number of orthogonal frequency division multiplexing (OFDM) symbols that each PDSCH scheduled by the DCI is separated from the DCI in the time domain. Compare the number of OFDM symbols between the PDSCH and the DCI with the Time Duration For QCL (TimeDurationForQCL). If the number of separated OFDM symbols is greater than or equal to TimeDurationForQCL, the terminal receives the PDSCH on the transmission beam of the DCI; if the number of separated OFDM symbols is less than TimeDurationForQCL, the terminal receives the PDSCH on the transmission beam used by the control resource set (CORESET) that is closest to the PDSCH in the time domain and has the smallest ID.

[0069] For each PDSCH among multiple PDSCHs scheduled by the same DCI, the prior art entirely uses one of the two methods to determine the beam used for receiving the PDSCH. In this way, the terminal will be unable to perform joint channel estimation to obtain the joint channel estimation gain of the DMRS (Demodulation Reference Signal), and may also be unable to obtain the gain of receiving the PDSCH on the beam of the DCI.

[0070] However, there is currently a lack of a method for determining whether to use Method 1 or Method 2 to determine the transmission beam used for the PDSCH when a single DCI schedules multiple PDSCHs.

[0071] Based on this, an embodiment of the present application proposes a method for determining a transmission beam of a physical downlink shared channel (PDSCH). Specifically: receiving downlink control information (DCI), where the DCI is used to schedule multiple PDSCHs; determining the time domain interval between the PDSCH and the DCI among the multiple PDSCHs; and determining the transmission beam used by the PDSCH according to the time domain interval. Thus, it is realized to determine the transmission beam used by the PDSCH according to the relationship between the DCI and the multiple PDSCHs it schedules, which can effectively perform DMRS joint channel estimation, obtain the DMRS joint channel estimation gain, and at the same time effectively obtain the gain of receiving the PDSCH on the beam of the DCI, improving the signal transmission efficiency.

[0072] For ease of understanding, the terms related to the present application are introduced.

[0073] 1. Downlink control information (DCI)

[0074] The DCI is carried by the physical downlink control channel (PDCCH). The DCI may include uplink and downlink resource allocation, transmission configuration indication (TCI), power control, etc. The PDCCH is a physical channel used to carry downlink scheduling information.

[0075] 2. Control resource set (CORESET)

[0076] The CORESET is a physical resource set for the PDCCH. It is configured with a resource granularity of 6 consecutive physical resource blocks (PRBs) in the frequency domain. The frequency domain resources within the CORESET can be continuous or discontinuous, and in the time domain, it includes 1 to 3 consecutive OFDM symbols. Within a bandwidth part (BWP), the base station can configure up to 3 CORESETs for a user equipment (UE). The transmission beams used by each CORESET can be different, and the base station can transmit the PDCCH through different downlink beams to obtain different gains.

[0077] 3. Quasi - co - location duration (TimeDurationForQCL)

[0078] In the existing standards, TimeDurationForQCL is the minimum number of OFDM symbols that the terminal can apply the TCI indication received in the DCI. If the number of OFDM symbols is greater than or equal to TimeDurationForQCL, the DCI requires the terminal to switch beams when receiving the physical downlink share channel (PDSCH).

[0079] Figure 1 The flowchart shows a method for determining the transmission beam of the physical downlink shared channel PDSCH provided by an embodiment of the present application. The technical solution provided by the embodiment of the present application can be applied to a variety of systems, especially 5G systems. For example, the applicable systems can be the global system of mobile communication (GSM) system, code division multiple access (CDMA) system, wideband code division multiple access (WCDMA) general packet radio service (GPRS) system, long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (TDD) system, long term evolution advanced (LTE-A) system, universal mobile telecommunication system (UMTS), worldwide interoperability for microwave access (WiMAX) system, 5G new radio (NR) system, etc. Both terminal devices and network devices are included in these various systems. The core network part can also be included in the system, such as the evolved packet system (EPS), 5G system (5GS), etc.

[0080] As Figure 1 shown, the method for determining the transmission beam of the physical downlink shared channel PDSCH includes:

[0081] Step 101, receive the downlink control information DCI, where the DCI is used to schedule multiple PDSCHs.

[0082] In this embodiment, the base station may send the DCI to the terminal, where the DCI is used to schedule multiple PDSCHs, and the DCI may include uplink and downlink resource allocation, transmission configuration indication, power control, etc.

[0083] Step 102: Determine the time domain interval between the PDSCH and the DCI among the multiple PDSCHs.

[0084] Step 103: Determine the transmission beam used for the PDSCH according to the time domain interval.

[0085] In this embodiment, the transmission beam used for the PDSCH may be determined based on the transmission beam of the DCI, or the transmission beam used for the PDSCH may be determined based on the transmission beam of the first PDSCH in the time domain scheduled by the DCI.

[0086] In an embodiment of the present application, the time domain interval may be the number of orthogonal frequency division multiplexing (OFDM) symbols by which the DCI and the PDSCH are separated in the time domain.

[0087] As Figure 2 shown, in an embodiment of the present application, the determining the transmission beam used for the PDSCH according to the time domain interval includes:

[0088] Step 201: If the time domain interval is less than the quasi co-location duration TimeDurationForQCL, and the PDSCH is the first PDSCH in the time domain scheduled by the DCI, then use the transmission beam of the control resource set (CORESET) that is closest to the PDSCH and has the smallest ID as the transmission beam used for the PDSCH.

[0089] Step 202: If the time domain interval is less than the quasi co-location duration TimeDurationForQCL, and the PDSCH is not the first PDSCH in the time domain scheduled by the DCI, then use the transmission beam of the first PDSCH in the time domain scheduled by the DCI as the transmission beam used for the PDSCH.

[0090] Step 203: If the time domain interval is less than the TimeDurationForQCL, and the PDSCH is the first PDSCH in the time domain scheduled by the DCI, and there is a transition interval symbol before the PDSCH data, and the sum of the time domain interval and the transition interval symbol is greater than or equal to the TimeDurationForQCL, then use the transmission beam of the DCI as the transmission beam of the PDSCH.

[0091] TimeDurationForQCL is the minimum number of OFDM symbols required for the terminal to apply the TCI indication received in the DCI. If the number of OFDM symbols is greater than or equal to TimeDurationForQCL, the DCI requires the terminal to switch the transmission beam when receiving the PDSCH.

[0092] As Figure 13 shown, in a possible implementation manner of this application, DCI1 schedules three PDSCHs: PDSCH1, PDSCH2, and PDSCH3. The base station indicates that the transmission beam of PDCCH1 is beam 1, and DCI1 is carried by PDCCH1. The transmission beam of DCI1 is beam 3. The time domain interval between PDSCH1 and DCI1 is less than the TimeDurationForQCL, and PDSCH1 is the first PDSCH in the time domain scheduled by the DCI. Therefore, the transmission beam of the control resource set CORESET that is closest to and has the smallest ID among those related to PDSCH1 is used as the transmission beam for PDSCH1, that is, beam 1 is used as the transmission beam for PDSCH1.

[0093] As Figure 3 shown, in an embodiment of this application, determining the transmission beam used for the PDSCH according to the time domain interval includes:

[0094] Step 301, if the time domain interval is greater than or equal to the TimeDurationForQCL, and the PDSCH is the first PDSCH in the time domain scheduled by the DCI, then use the transmission beam of the DCI as the transmission beam of the PDSCH.

[0095] Step 302, if the time domain interval is greater than or equal to the TimeDurationForQCL, and the PDSCH is not the first PDSCH in the time domain scheduled by the DCI, then determine the transmission beam used for the PDSCH according to the difference information between the PDSCH and the previous PDSCH with the smallest time domain interval among the PDSCHs scheduled by the DCI.

[0096] As Figure 4 shown, in an embodiment of this application, determining the transmission beam used for the PDSCH according to the difference information between the PDSCH and the previous PDSCH with the smallest time domain interval among the PDSCHs scheduled by the DCI includes:

[0097] Step 401, determine whether the transmission beam of the DCI is the same as the transmission beam used for the previous PDSCH with the smallest time domain interval among the PDSCHs scheduled by the DCI.

[0098] Step 402: Determine whether the time domain interval between the PDSCH and the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI is greater than or equal to n OFDM symbols or n milliseconds, where n is the number of OFDM symbols or the millisecond threshold.

[0099] Step 403: Determine whether the carrier of the PDSCH is the same as the carrier of the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI.

[0100] Step 404: Obtain the transmission beam of the PDSCH.

[0101] As Figure 5 shown, in an embodiment of the present application, the obtaining the transmission beam of the PDSCH includes:

[0102] Step 501: If the transmission beam of the DCI is the same as the transmission beam used by the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI, and the time domain interval between the PDSCH and the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI is less than n OFDM symbols or n milliseconds, and the carrier of the PDSCH is the same as the carrier of the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI, then use the transmission beam of the first PDSCH in the PDSCH scheduled by the DCI as the transmission beam of the PDSCH, where n is a positive integer;

[0103] Step 502: Otherwise, use the transmission beam indicated by the DCI as the transmission beam of the PDSCH.

[0104] Using the transmission beam of the first PDSCH in the PDSCH scheduled by the DCI as the transmission beam of the PDSCH can perform DMRS joint channel estimation, obtain the DMRS joint channel estimation, and at the same time, the gain of receiving the PDSCH on the beam of the DCI can be obtained, improving the transmission efficiency.

[0105] As Figure 13As shown, in a possible implementation of the present application, DCI1 schedules three PDSCHs: PDSCH1, PDSCH2, and PDSCH3. The base station indicates that the transmission beam of PDCCH1 is beam 1. Since DCI1 is carried by PDCCH1, the transmission beam of DCI1 is beam 1. The transmission beam indicated by DCI1 is beam 3. The transmission beam of PDSCH2 is beam 2. The time domain interval between PDSCH3 and DCI1 is greater than the TimeDurationForQCL. The transmission beam of DCI1 is different from the transmission beam of the previous PDSCH with the smallest time domain interval from PDSCH3 among the PDSCHs scheduled by DCI1, that is, PDSCH2. Therefore, the transmission beam indicated by DCI1, that is, beam 3, is used as the transmission beam of PDSCH3.

[0106] As Figure 14 As shown, in a possible implementation of the present application, DCI1 schedules three PDSCHs: PDSCH1, PDSCH2, and PDSCH3. The base station indicates that the transmission beam of PDCCH1 is beam 1. Since DCI1 is carried by PDCCH1, the transmission beam of DCI1 is beam 1. The transmission beam indicated by DCI1 is beam 3. The transmission beam of PDSCH2 is beam 1. The time domain interval between PDSCH3 and DCI1 is greater than the TimeDurationForQCL, and the time domain interval between the PDSCH and the previous PDSCH with the smallest time domain interval from the PDSCH among the PDSCHs scheduled by DCI1 is greater than or equal to n OFDM symbols or n milliseconds. Therefore, the transmission beam indicated by DCI1, that is, beam 3, is used as the transmission beam of the PDSCH.

[0107] As Figure 15 As shown, in a possible implementation of the present application, DCI1 schedules three PDSCHs: PDSCH1, PDSCH2, and PDSCH3. The base station indicates that the transmission beam of PDCCH1 is beam 1. Since DCI1 is carried by PDCCH1, the transmission beam of DCI1 is beam 1. The transmission beam indicated by DCI1 is beam 3. The transmission beam of PDSCH2 is beam 1. The time domain interval between PDSCH3 and DCI1 is greater than the TimeDurationForQCL, and the carrier of PDSCH3 is different from the carrier of the previous PDSCH with the smallest time domain interval from PDSCH3 among the PDSCHs scheduled by DCI, that is, PDSCH2. Therefore, the transmission beam indicated by DCI1, that is, beam 3, is used as the transmission beam of the PDSCH.

[0108] As Figure 16As shown, in a possible implementation manner of the present application, DCI1 schedules three PDSCHs: PDSCH1, PDSCH2, and PDSCH3. The base station indicates that the transmission beam of PDCCH1 is beam 1. Since DCI1 is carried by PDCCH1, the transmission beam of DCI1 is beam 1. The transmission beam indicated by DCI1 is beam 3. The transmission beam of PDSCH2 is beam 1. The time domain interval between PDSCH3 and DCI1 is greater than the TimeDurationForQCL. The transmission beam of the DCI1-scheduled PDSCH that is the previous PDSCH with the smallest time domain interval from PDSCH3, that is, PDSCH2, is the same, and the time domain interval between the PDSCH and the previous PDSCH with the smallest time domain interval from the PDSCH among the DCI1-scheduled PDSCHs, that is, PDSCH2, is less than n OFDM symbols or n milliseconds, and the carrier of the PDSCH is the same as that of the previous PDSCH with the smallest time domain interval from the PDSCH among the DCI1-scheduled PDSCHs, that is, PDSCH2. Then, the transmission beam of the first PDSCH among the DCI-scheduled PDSCHs, that is, beam 1, is used as the transmission beam of PDSCH3.

[0109] As Figure 6 shown, in an embodiment of the present application, as Figure 1 described, after receiving the downlink control information DCI, it further includes:

[0110] Step 601: Determine whether there is a PDCCH that overlaps with the PDSCH in the time domain.

[0111] Step 602: If there is a PDCCH that overlaps with the PDSCH in the time domain, use the transmission beam of the PDCCH as the transmission beam of the PDSCH.

[0112] As Figure 13 shown, in a possible implementation manner of the present application, DCI1 schedules three PDSCHs: PDSCH1, PDSCH2, and PDSCH3. The base station indicates that the transmission beam of PDCCH1 is beam 1. Since DCI1 is carried by PDCCH1, the transmission beam of DCI1 is beam 1. The transmission beam indicated by DCI1 is beam 3. The base station indicates that the transmission beam of PDCCH2 is beam 2. The time domain interval between PDSCH2 and DCI1 is greater than the TimeDurationForQCL, and PDCCH2 overlaps with PDSCH2 in the time domain. Therefore, the transmission beam of PDCCH2 is used as the transmission beam of PDSCH2, that is, PDSCH2 is transmitted on beam 2.

[0113] As Figure 7As shown, in an embodiment of the present application, as Figure 1 after determining the transmission beam used for the PDSCH according to the time domain interval, the method further includes:

[0114] Step 701: Determine whether the DCI indicates multiple transmission configuration indicators (TCIs), where the multiple TCIs correspond to one or more PDSCHs in the PDSCH scheduled by the DCI;

[0115] Step 702: If the DCI indicates multiple TCIs, and the time domain interval is greater than or equal to the TimeDurationForQCL, and the PDSCH is the first PDSCH in the time domain scheduled by the DCI, then use the transmission beam of the TCI corresponding to the PDSCH in the DCI as the transmission beam of the PDSCH;

[0116] Step 703: If the DCI indicates multiple TCIs, and the time domain interval is greater than or equal to the TimeDurationForQCL, and the PDSCH is not the first PDSCH in the time domain scheduled by the DCI, then determine the transmission beam used for the PDSCH according to the difference information between the PDSCH and the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI.

[0117] In a possible case, a DCI contains multiple TCIs, and the multiple TCIs respectively correspond to different PDSCHs. When obtaining the transmission beam of the PDSCH, it is necessary to determine according to the TCI corresponding to the PDSCH.

[0118] As Figure 8 shown, in an embodiment of the present application, the determining the transmission beam used for the PDSCH according to the difference information between the PDSCH and the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI includes:

[0119] Step 801: Determine whether the transmission beam of the DCI is the same as the transmission beam used for the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI;

[0120] Step 802: Determine whether the time domain interval between the PDSCH and the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI is greater than or equal to n OFDM symbols or n milliseconds, where n is the number of OFDM symbols or the millisecond threshold;

[0121] Step 803: Determine whether the carrier of the PDSCH is the same as the carrier of the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI.

[0122] Step 804: Obtain the transmission beam of the PDSCH.

[0123] As Figure 9 shown, in an embodiment of the present application, the obtaining the transmission beam of the PDSCH includes:

[0124] Step 901: If the transmission beam of the DCI is the same as the transmission beam used by the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI, and the time domain interval between the PDSCH and the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI is less than n OFDM symbols or n milliseconds, and the carrier of the PDSCH is the same as the carrier of the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI, then use the transmission beam of the first PDSCH among the PDSCHs scheduled by the DCI as the transmission beam of the PDSCH;

[0125] Step 902: Otherwise, use the transmission beam of the TCI corresponding to the PDSCH in the DCI as the transmission beam of the PDSCH.

[0126] As Figure 10 shown, in an embodiment of the present application, the determining the transmission beam used by the PDSCH according to the time domain interval includes:

[0127] Step 1001: Determine whether there is a TCI field in the DCI;

[0128] Step 1002: If there is no TCI field in the DCI, and the time domain interval is greater than or equal to the TimeDurationForQCL, and the PDSCH is the first PDSCH in the time domain scheduled by the DCI, then use the beam of the TCI with the smallest activated ID available for the PDSCH in the activated subset bandwidth BWP of the scheduling cell as the transmission beam of the PDSCH;

[0129] Step 1003, if there is no TCI field in the DCI, and the time domain interval is greater than or equal to the TimeDurationForQCL, and the PDSCH is not the first PDSCH in the time domain scheduled by the DCI, then determine the transmission beam used for the PDSCH according to the difference information between the PDSCH and the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI.

[0130] In a possible case, the PDCCH carrying the DCI and the PDSCH scheduled by the DCI are not on the same carrier, and there is no TCI field in the DCI. According to the characteristics of the system configuration, some information fields in the DCI may or may not appear. For the case where there is no TCI field in the DCI, we need to receive the PDSCH according to the beam of the TCI with the smallest activated ID available for the PDSCH in the activated subset bandwidth BWP of the scheduled cell.

[0131] As Figure 11 shown, in an embodiment of the present application, the determining the transmission beam used for the PDSCH according to the difference information between the PDSCH and the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI includes:

[0132] Step 1101, determine whether the transmission beam of the DCI is the same as the transmission beam used for the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI;

[0133] Step 1102, determine whether the time domain interval between the PDSCH and the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI is greater than or equal to n OFDM symbols or n milliseconds, where n is the number of OFDM symbols or the millisecond threshold;

[0134] Step 1103, determine whether the carrier of the PDSCH is the same as the carrier of the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI;

[0135] Step 1104, obtain the transmission beam of the PDSCH.

[0136] As Figure 12 shown, in an embodiment of the present application, the obtaining the transmission beam of the PDSCH includes:

[0137] Step 1201, if the transmission beam of the DCI is the same as the transmission beam of the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI, and the time domain interval between the PDSCH and the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI is less than n OFDM symbols or n milliseconds, and the carrier of the PDSCH is the same as the carrier of the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI, then use the transmission beam of the first PDSCH among the PDSCHs scheduled by the DCI as the transmission beam of the PDSCH;

[0138] Step 1202, otherwise, use the beam of the TCI with the smallest activated ID available for the PDSCH in the activated subset bandwidth BWP of the scheduling cell as the transmission beam of the PDSCH.

[0139] To implement the above embodiments, an embodiment of the present application also proposes a device for determining the transmission beam of a physical downlink shared channel PDSCH. Figure 17This is a schematic structural diagram of an apparatus for determining a transmission beam of a Physical Downlink Shared Channel (PDSCH) provided by an embodiment of the present application. The network device involved in the embodiment of the present application may be a base station, and the base station may include multiple cells that provide services to terminals. Depending on specific application scenarios, the base station may also be referred to as an access point, or may be a device in the access network that communicates with wireless terminal devices through one or more sectors over the air interface, or other names. The network device can be used to mutually replace the received air frames and Internet Protocol (IP) packets, and act as a router between the wireless terminal device and the rest of the access network, where the rest of the access network may include an IP communication network. The network device can also coordinate the attribute management of the air interface. For example, the network device involved in the embodiment of the present application may be a network device (Base Transceiver Station, BTS) in a Global System for Mobile communications (GSM) or Code Division Multiple Access (CDMA), or may be a network device (NodeB) in a Wide-band Code Division Multiple Access (WCDMA), or may also be an evolved network device (evolutional Node B, eNB or e-NodeB) in a Long Term Evolution (LTE) system, a 5G base station (gNB) in a 5G network architecture (next generation system), or may also be a Home evolved Node B (HeNB), a relay node, a femto, a pico, etc. The embodiment of the present application does not limit this. In some network architectures, the network device may include a centralized unit (CU) node and a distributed unit (DU) node, and the centralized unit and the distributed unit may also be geographically separated.

[0140] As Figure 17 shown, the apparatus for determining a transmission beam of a Physical Downlink Shared Channel (PDSCH) includes: a memory 1710, a transceiver 1720, and a processor 1730.

[0141] Among them, the memory 1710 is used to store computer programs; the transceiver 1720 is used to transmit and receive data under the control of the processor 1730; the processor 1730 is used to read the computer programs in the memory 1710 and perform the following operations:

[0142] Receive downlink control information DCI, where the DCI is used to schedule multiple PDSCHs.

[0143] Determine the time domain interval between the PDSCH and the DCI among the multiple PDSCHs.

[0144] Determine the transmission beam used by the PDSCH according to the time domain interval.

[0145] The transceiver 1720 is used to receive and send data under the control of the processor 1730.

[0146] Among them, in Figure 17 The bus architecture may include any number of interconnected buses and bridges, specifically, various circuits represented by one or more processors represented by the processor 1730 and the memory represented by the memory 1710 are linked together. The bus architecture can also link various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art, so they will not be further described herein. The bus interface provides an interface. The transceiver 1720 may be multiple elements, that is, including a transmitter and a receiver, and provides a unit for communicating with various other devices on a transmission medium, and these transmission mediums include wireless channels, wired channels, optical fiber cables, and other transmission mediums. For different user equipments, the user interface may also be an interface capable of externally connecting or internally connecting required devices, and the connected devices include but are not limited to a keypad, a display, a speaker, a microphone, a joystick, etc.

[0147] The processor 1730 is responsible for managing the bus architecture and general processing, and the memory 1710 may store data used by the processor 1730 when executing operations.

[0148] Optionally, the processor 1730 may be a Central Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), a Field-Programmable Gate Array (FPGA), or a Complex Programmable Logic Device (CPLD), and the processor 1730 may also adopt a multi-core architecture.

[0149] The processor 1730 is used to execute the method provided in the embodiment of the present application according to the obtained executable instructions by calling the computer program stored in the memory. The processor 1730 and the memory 1710 may also be physically separated. Figure 1 of the method.

[0150] In a possible implementation manner of an embodiment of the present application, the time domain interval is the number of orthogonal frequency division multiplexing (OFDM) symbols by which the DCI is separated from the PDSCH in the time domain.

[0151] In a possible implementation manner of an embodiment of the present application, determining the transmission beam used by the PDSCH according to the time domain interval includes:

[0152] If the time domain interval is less than the quasi co-location duration TimeDurationForQCL, and the PDSCH is the first PDSCH in the time domain scheduled by the DCI, then use the transmission beam of the control resource set (CORESET) that is closest to the PDSCH and has the smallest ID as the transmission beam used by the PDSCH;

[0153] If the time domain interval is less than the quasi co-location duration TimeDurationForQCL, and the PDSCH is not the first PDSCH in the time domain scheduled by the DCI, then use the transmission beam of the first PDSCH in the time domain scheduled by the DCI as the transmission beam used by the PDSCH.

[0154] If the time domain interval is less than the TimeDurationForQCL, and the PDSCH is the first PDSCH in the time domain scheduled by the DCI, and there is a conversion interval symbol before the PDSCH data, and the sum of the time domain interval and the conversion interval symbol is greater than or equal to the TimeDurationForQCL, then use the transmission beam of the DCI as the transmission beam of the PDSCH.

[0155] In a possible implementation manner of an embodiment of the present application, determining the transmission beam used by the PDSCH according to the time domain interval includes:

[0156] If the time domain interval is greater than or equal to the TimeDurationForQCL, and the PDSCH is the first PDSCH in the time domain scheduled by the DCI, then use the transmission beam of the DCI as the transmission beam used by the PDSCH;

[0157] If the time domain interval is greater than or equal to the TimeDurationForQCL, and the PDSCH is not the first PDSCH in the time domain scheduled by the DCI, then determine the transmission beam used by the PDSCH according to the difference information between the PDSCH and the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI.

[0158] In a possible implementation manner of the embodiment of the present application, determining the transmission beam used by the PDSCH according to the difference information between the PDSCH and the previous PDSCH with the smallest time domain interval among the PDSCHs scheduled by the DCI includes:

[0159] Determining whether the transmission beam of the DCI is the same as the transmission beam used by the previous PDSCH with the smallest time domain interval among the PDSCHs scheduled by the DCI;

[0160] Determining whether the time domain interval between the PDSCH and the previous PDSCH with the smallest time domain interval among the PDSCHs scheduled by the DCI is greater than or equal to n OFDM symbols or n milliseconds, where n is the number of OFDM symbols or the millisecond threshold;

[0161] Determining whether the carrier of the PDSCH is the same as the carrier of the previous PDSCH with the smallest time domain interval among the PDSCHs scheduled by the DCI;

[0162] Obtaining the transmission beam of the PDSCH.

[0163] In a possible implementation manner of the embodiment of the present application, obtaining the transmission beam of the PDSCH includes:

[0164] If the transmission beam of the DCI is the same as the transmission beam used by the previous PDSCH with the smallest time domain interval among the PDSCHs scheduled by the DCI, and the time domain interval between the PDSCH and the previous PDSCH with the smallest time domain interval among the PDSCHs scheduled by the DCI is less than n OFDM symbols or n milliseconds, and the carrier of the PDSCH is the same as the carrier of the previous PDSCH with the smallest time domain interval among the PDSCHs scheduled by the DCI, then use the transmission beam of the first PDSCH among the PDSCHs scheduled by the DCI as the transmission beam of the PDSCH, where n is a positive integer;

[0165] Otherwise, use the transmission beam indicated by the DCI as the transmission beam of the PDSCH.

[0166] In a possible implementation manner of the embodiment of the present application, after receiving the downlink control information DCI, it further includes:

[0167] Determining whether there is a PDCCH that overlaps with the PDSCH in the time domain;

[0168] If there is a PDCCH that overlaps with the PDSCH in the time domain, use the transmission beam of the PDCCH as the transmission beam of the PDSCH.

[0169] In a possible implementation manner of the embodiment of the present application, determining the transmission beam used for the PDSCH according to the time domain interval includes:

[0170] Determining whether a plurality of transmission configuration indicators (TCIs) are indicated in the DCI, where the plurality of TCIs correspond to one or more PDSCHs in the PDSCH scheduled by the DCI;

[0171] If a plurality of TCIs are indicated in the DCI, and the time domain interval is greater than or equal to the TimeDurationForQCL, and the PDSCH is the first PDSCH in the time domain scheduled by the DCI, then use the transmission beam of the TCI corresponding to the PDSCH in the DCI as the transmission beam of the PDSCH;

[0172] If a plurality of TCIs are indicated in the DCI, and the time domain interval is greater than or equal to the TimeDurationForQCL, and the PDSCH is not the first PDSCH in the time domain scheduled by the DCI, then determine the transmission beam used for the PDSCH according to the difference information between the PDSCH and the previous PDSCH with the smallest time domain interval from the PDSCHs scheduled by the DCI.

[0173] In a possible implementation manner of the embodiment of the present application, determining the transmission beam used for the PDSCH according to the difference information between the PDSCH and the previous PDSCH with the smallest time domain interval from the PDSCHs scheduled by the DCI includes:

[0174] Determining whether the transmission beam of the DCI is the same as the transmission beam used for the previous PDSCH with the smallest time domain interval from the PDSCHs scheduled by the DCI;

[0175] Determining whether the time domain interval between the PDSCH and the previous PDSCH with the smallest time domain interval from the PDSCHs scheduled by the DCI is greater than or equal to n OFDM symbols or n milliseconds, where n is the number of OFDM symbols or the millisecond threshold;

[0176] Determining whether the carrier of the PDSCH is the same as the carrier of the previous PDSCH with the smallest time domain interval from the PDSCHs scheduled by the DCI;

[0177] Obtaining the transmission beam of the PDSCH.

[0178] In a possible implementation manner of the embodiment of the present application, obtaining the transmission beam of the PDSCH includes:

[0179] If the transmission beam of the DCI is the same as the transmission beam used by the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI, and the time domain interval between the PDSCH and the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI is less than n OFDM symbols or n milliseconds, and the carrier of the PDSCH is the same as the carrier of the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI, then use the transmission beam of the first PDSCH among the PDSCHs scheduled by the DCI as the transmission beam of the PDSCH;

[0180] Otherwise, use the transmission beam of the TCI corresponding to the PDSCH in the DCI as the transmission beam of the PDSCH.

[0181] In a possible implementation manner of the embodiment of the present application, determining the transmission beam used by the PDSCH according to the time domain interval includes:

[0182] Determine whether there is a TCI field in the DCI;

[0183] If there is no TCI field in the DCI, and the time domain interval is greater than or equal to the TimeDurationForQCL, and the PDSCH is the first PDSCH in the time domain scheduled by the DCI, then use the beam of the TCI with the smallest activated ID available for the PDSCH in the activated subset bandwidth BWP of the scheduling cell as the transmission beam of the PDSCH;

[0184] If there is no TCI field in the DCI, and the time domain interval is greater than or equal to the TimeDurationForQCL, and the PDSCH is not the first PDSCH in the time domain scheduled by the DCI, then determine the transmission beam used by the PDSCH according to the difference information between the PDSCH and the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI.

[0185] In a possible implementation manner of the embodiment of the present application, determining the transmission beam used by the PDSCH according to the difference information between the PDSCH and the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI includes:

[0186] Determine whether the transmission beam of the DCI is the same as the transmission beam used by the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI;

[0187] Determine whether the time domain interval between the PDSCH and the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI is greater than or equal to n OFDM symbols or n milliseconds, where n is the number of OFDM symbols or the millisecond threshold;

[0188] Determine whether the carrier of the PDSCH is the same as the carrier of the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI;

[0189] Obtain the transmission beam of the PDSCH.

[0190] In a possible implementation manner of an embodiment of the present application, the obtaining the transmission beam of the PDSCH includes:

[0191] If the transmission beam of the DCI is the same as the transmission beam used by the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI, and the time domain interval between the PDSCH and the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI is less than n OFDM symbols or n milliseconds, and the carrier of the PDSCH is the same as the carrier of the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI, then use the transmission beam of the first PDSCH among the PDSCHs scheduled by the DCI as the transmission beam of the PDSCH;

[0192] Otherwise, use the beam of the TCI with the smallest activated ID available for the PDSCH in the activated subset bandwidth BWP of the scheduling cell as the transmission beam of the PDSCH.

[0193] According to an embodiment of the present application, the present application also provides a device for determining the transmission beam of a physical downlink shared channel PDSCH, Figure 18 which is a schematic structural diagram of a device for determining the transmission beam of a physical downlink shared channel PDSCH provided by an embodiment of the present application.

[0194] It should be noted that the division of units in the embodiments of the present application is schematic, only a logical function division, and there may be other division methods in actual implementation. In addition, in each embodiment of the present application, each functional unit may be integrated in a processing unit, or each unit may exist physically alone, or two or more units may be integrated in one unit. The above integrated units may be implemented in the form of hardware or in the form of software functional units.

[0195] When the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a processor-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor to execute all or part of the steps of the methods described in various embodiments of this application. The aforementioned storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memories (ROMs), random access memories (RAMs), magnetic disks, or optical discs that can store program codes.

[0196] As Figure 18 shown, the determining device 1800 for the PDSCH transmission beam includes:

[0197] A downlink control information receiving unit 1810, configured to receive downlink control information DCI, where the DCI is used to schedule multiple PDSCHs;

[0198] A time domain interval obtaining unit 1820, configured to determine the time domain interval between the PDSCH and the DCI among the multiple PDSCHs;

[0199] A transmission beam obtaining unit 1830, configured to determine the transmission beam used by the PDSCH according to the time domain interval.

[0200] In a possible implementation manner of an embodiment of this application, the downlink control information receiving unit 1810 is further configured to receive downlink control information DCI, where the DCI is used to schedule multiple PDSCHs, and the time domain interval is the number of orthogonal frequency division multiplexing (OFDM) symbols by which the DCI and the PDSCH are separated in the time domain.

[0201] In a possible implementation manner of an embodiment of this application, the transmission beam obtaining unit 1830 is configured to determine the transmission beam used by the PDSCH according to the time domain interval, where determining the transmission beam used by the PDSCH according to the time domain interval includes:

[0202] If the time domain interval is less than the quasi co-location duration TimeDurationForQCL, and the PDSCH is the first PDSCH in the time domain scheduled by the DCI, then use the transmission beam of the control resource set CORESET that is closest to the PDSCH and has the smallest ID as the transmission beam used by the PDSCH;

[0203] If the time domain interval is less than the quasi co-location duration TimeDurationForQCL, and the PDSCH is not the first PDSCH in the time domain scheduled by the DCI, then use the transmission beam of the first PDSCH in the time domain scheduled by the DCI as the transmission beam used by the PDSCH.

[0204] If the time domain interval is less than the TimeDurationForQCL, and the PDSCH is the first PDSCH in the time domain scheduled by the DCI, and there is a conversion interval symbol before the PDSCH data, and the sum of the time domain interval and the conversion interval symbol is greater than or equal to the TimeDurationForQCL, then use the transmission beam of the DCI as the transmission beam of the PDSCH.

[0205] In a possible implementation manner of the embodiment of the present application, the transmission beam acquisition unit 1830 is configured to determine the transmission beam used by the PDSCH according to the time domain interval, where determining the transmission beam used by the PDSCH according to the time domain interval includes:

[0206] If the time domain interval is greater than or equal to the TimeDurationForQCL, and the PDSCH is the first PDSCH in the time domain scheduled by the DCI, then use the transmission beam of the DCI as the transmission beam of the PDSCH;

[0207] If the time domain interval is greater than or equal to the TimeDurationForQCL, and the PDSCH is not the first PDSCH in the time domain scheduled by the DCI, then determine the transmission beam used by the PDSCH according to the difference information between the PDSCH and the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI.

[0208] In a possible implementation manner of the embodiment of the present application, the transmission beam acquisition unit 1830 is configured to determine the transmission beam used by the PDSCH according to the time domain interval, where determining the transmission beam used by the PDSCH according to the difference information between the PDSCH and the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI includes:

[0209] Determine whether the transmission beam of the DCI is the same as the transmission beam used by the previous PDSCH with the smallest time domain interval from the PDSCH among the PDSCHs scheduled by the DCI;

[0210] Determine whether the time domain interval between the PDSCH and the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI is greater than or equal to n OFDM symbols or n milliseconds, where n is the number of OFDM symbols or the millisecond threshold;

[0211] Determine whether the carrier of the PDSCH is the same as the carrier of the previous PDSCH with the smallest time domain interval from the PDSCH among the PDSCHs scheduled by the DCI;

[0212] Obtain the transmission beam of the PDSCH.

[0213] In a possible implementation manner of the embodiments of the present application, the transmission beam acquisition unit 1830 is configured to determine the transmission beam used by the PDSCH according to the time domain interval, where obtaining the transmission beam of the PDSCH includes:

[0214] If the transmission beam of the DCI is the same as the transmission beam used by the previous PDSCH with the smallest time domain interval from the PDSCH among the PDSCHs scheduled by the DCI, and the time domain interval between the PDSCH and the previous PDSCH with the smallest time domain interval from the PDSCH among the PDSCHs scheduled by the DCI is less than n OFDM symbols or n milliseconds, and the carrier of the PDSCH is the same as the carrier of the previous PDSCH with the smallest time domain interval from the PDSCH among the PDSCHs scheduled by the DCI, then use the transmission beam of the first PDSCH among the PDSCHs scheduled by the DCI as the transmission beam of the PDSCH, where n is a positive integer;

[0215] Otherwise, use the transmission beam indicated by the DCI as the transmission beam of the PDSCH.

[0216] In a possible implementation manner of the embodiments of the present application, the downlink control information receiving unit 1810 is further configured to receive downlink control information DCI, where the DCI is used to schedule multiple PDSCHs, and after receiving the downlink control information DCI, it further includes:

[0217] Determine whether there is a PDCCH that overlaps with the PDSCH in the time domain;

[0218] If there is a PDCCH that overlaps with the PDSCH in the time domain, use the transmission beam of the PDCCH as the transmission beam of the PDSCH.

[0219] In a possible implementation manner of an embodiment of the present application, the transmission beam obtaining unit 1830 is configured to determine the transmission beam used for the PDSCH according to the time domain interval, where determining the transmission beam used for the PDSCH according to the time domain interval includes:

[0220] Determine whether multiple transmission configuration indicators (TCIs) are indicated in the DCI, where the multiple TCIs correspond to one or more PDSCHs in the PDSCH scheduled by the DCI;

[0221] If multiple TCIs are indicated in the DCI, the time domain interval is greater than or equal to the TimeDurationForQCL, and the PDSCH is the first PDSCH in the time domain scheduled by the DCI, then use the transmission beam of the TCI corresponding to the PDSCH in the DCI as the transmission beam of the PDSCH;

[0222] If multiple TCIs are indicated in the DCI, the time domain interval is greater than or equal to the TimeDurationForQCL, and the PDSCH is not the first PDSCH in the time domain scheduled by the DCI, then determine the transmission beam used for the PDSCH according to the difference information between the PDSCH and the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI.

[0223] In a possible implementation manner of an embodiment of the present application, the transmission beam obtaining unit 1830 is configured to determine the transmission beam used for the PDSCH according to the time domain interval, where determining the transmission beam used for the PDSCH according to the difference information between the PDSCH and the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI includes:

[0224] Determine whether the transmission beam of the DCI is the same as the transmission beam used for the previous PDSCH with the smallest time domain interval from the PDSCH among the PDSCHs scheduled by the DCI;

[0225] Determine whether the time domain interval between the PDSCH and the previous PDSCH with the smallest time domain interval from the PDSCH among the PDSCHs scheduled by the DCI is greater than or equal to n OFDM symbols or n milliseconds, where n is the number of OFDM symbols or the millisecond threshold;

[0226] Determine whether the carrier of the PDSCH is the same as the carrier of the previous PDSCH with the smallest time domain interval from the PDSCH among the PDSCHs scheduled by the DCI;

[0227] Obtain the transmission beam of the PDSCH.

[0228] In a possible implementation manner of an embodiment of the present application, a transmission beam obtaining unit 1830 is configured to determine a transmission beam used for the PDSCH according to the time domain interval, where obtaining the transmission beam of the PDSCH includes:

[0229] If the transmission beam of the DCI is the same as the transmission beam used for the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI, and the time domain interval between the PDSCH and the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI is less than n OFDM symbols or n milliseconds, and the carrier of the PDSCH is the same as the carrier of the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI, then use the transmission beam of the first PDSCH in the PDSCHs scheduled by the DCI as the transmission beam of the PDSCH;

[0230] Otherwise, use the transmission beam of the TCI corresponding to the PDSCH in the DCI as the transmission beam of the PDSCH.

[0231] In a possible implementation manner of an embodiment of the present application, a transmission beam obtaining unit 1830 is configured to determine a transmission beam used for the PDSCH according to the time domain interval, where determining the transmission beam used for the PDSCH according to the time domain interval includes:

[0232] Determine whether there is a TCI field in the DCI;

[0233] If there is no TCI field in the DCI, and the time domain interval is greater than or equal to the TimeDurationForQCL, and the PDSCH is the first PDSCH in the time domain scheduled by the DCI, then use the beam of the TCI with the smallest activated ID available for the PDSCH in the activated subset bandwidth BWP of the scheduling cell as the transmission beam of the PDSCH;

[0234] If there is no TCI field in the DCI, and the time domain interval is greater than or equal to the TimeDurationForQCL, and the PDSCH is not the first PDSCH in the time domain scheduled by the DCI, then determine the transmission beam used for the PDSCH according to the difference information between the PDSCH and the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI.

[0235] In a possible implementation manner of the embodiment of the present application, the transmission beam obtaining unit 1830 is configured to determine the transmission beam used for the PDSCH according to the time domain interval, where determining the transmission beam used for the PDSCH according to the difference information between the PDSCH and the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI includes:

[0236] Determine whether the transmission beam of the DCI is the same as the transmission beam used for the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI;

[0237] Determine whether the time domain interval between the PDSCH and the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI is greater than or equal to n OFDM symbols or n milliseconds, where n is the number of OFDM symbols or the millisecond threshold;

[0238] Determine whether the carrier of the PDSCH is the same as the carrier of the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI;

[0239] Obtain the transmission beam of the PDSCH.

[0240] In a possible implementation manner of the embodiment of the present application, the transmission beam obtaining unit 1830 is configured to determine the transmission beam used for the PDSCH according to the time domain interval, where obtaining the transmission beam of the PDSCH includes:

[0241] If the transmission beam of the DCI is the same as the transmission beam used for the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI, and the time domain interval between the PDSCH and the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI is less than n OFDM symbols or n milliseconds, and the carrier of the PDSCH is the same as the carrier of the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI, then use the transmission beam of the first PDSCH in the PDSCHs scheduled by the DCI as the transmission beam of the PDSCH;

[0242] Otherwise, use the beam of the TCI with the smallest activated ID available for the PDSCH in the activated subset bandwidth BWP of the scheduling cell as the transmission beam of the PDSCH.

[0243] It should be noted that in each embodiment of the present application, each functional unit can be integrated into one processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

[0244] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a processor-readable storage medium. Based on such an understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network-side device, etc.) or a processor to execute all or part of the steps of the methods in the various embodiments of the present application. The aforementioned storage medium includes: USB flash drives, mobile hard disks, read-only memories (ROM), random access memories (RAM), magnetic disks, or optical disks, etc., which can store program codes.

[0245] To implement the above embodiments, the present application also proposes a processor-readable storage medium.

[0246] Among them, the processor-readable storage medium stores a computer program, and this computer program is used to cause the processor to execute the present application Figure 1 method for determining the transmission beam of the physical downlink shared channel PDSCH described in the embodiments.

[0247] Among them, the processor-readable storage medium can be any available medium or data storage device that the processor can access, including but not limited to magnetic memories (such as floppy disks, hard disks, magnetic tapes, magneto-optical disks (MO), etc.), optical memories (such as CDs, DVDs, BDs, HVDs, etc.), and semiconductor memories (such as ROM, EPROM, EEPROM, non-volatile memories (NANDFLASH), solid-state drives (SSD)).

[0248] Those skilled in the art should understand that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application can adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk memories and optical memories, etc.) that contain computer-usable program codes.

[0249] This application is described with reference to the flowcharts and / or block diagrams of methods, apparatuses (systems), and computer program products according to embodiments of the present application. It should be understood that each flow and / or block in the flowchart and / or block diagram, as well as the combination of flows and / or blocks in the flowchart and / or block diagram, can be implemented by computer-executable instructions. These computer-executable instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, such that the instructions executed by the processor of the computer or other programmable data processing devices generate a means for implementing the functions specified in one or more of the flows Figure 1 one or more flows and / or blocks Figure 1 or one or more of the blocks.

[0250] These processor-executable instructions can also be stored in a processor-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, such that the instructions stored in the processor-readable memory generate a manufactured article including an instruction means that implements the functions specified in one or more of the flows Figure 1 one or more flows and / or blocks Figure 1 or one or more of the blocks.

[0251] These processor-executable instructions can also be loaded onto a computer or other programmable data processing device, such that a series of operation steps are executed on the computer or other programmable device to generate a computer-implemented process, and thus the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one or more of the flows Figure 1 one or more flows and / or blocks Figure 1 or one or more of the blocks.

[0252] It should be understood that various forms of the flow shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this application can be executed in parallel, sequentially, or in a different order, as long as the desired results of the technical solutions disclosed in this application can be achieved. No limitations are imposed herein.

[0253] Obviously, the above specific embodiments do not constitute a limitation on the protection scope of this application. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application shall be included within the protection scope of this application.

Claims

1. A method for determining a transmission beam of a Physical Downlink Shared Channel (PDSCH), characterized in that, The method includes: Receiving downlink control information DCI, where the DCI is used to schedule multiple PDSCHs; Determining a time domain interval between the PDSCH and the DCI among the multiple PDSCHs; Determining a transmission beam used for the PDSCH according to the time domain interval; After receiving the downlink control information DCI, it further includes: If there is a PDCCH overlapping with the PDSCH in the time domain, using the transmission beam of the PDCCH as the transmission beam of the PDSCH; The determining the transmission beam used for the PDSCH according to the time domain interval includes: If the time domain interval is less than the quasi-co-location duration TimeDurationForQCL, and the PDSCH is the first PDSCH in the time domain scheduled by the DCI, using the transmission beam of the control resource set CORESET that is closest to the PDSCH and has the smallest ID as the transmission beam used for the PDSCH.

2. The method according to claim 1, wherein The time domain interval is the number of orthogonal frequency division multiplexing OFDM symbols by which the DCI and the PDSCH are separated in the time domain.

3. The method according to claim 1, characterized in that, The determining the transmission beam used for the PDSCH according to the time domain interval further includes: If the time domain interval is less than the TimeDurationForQCL, and the PDSCH is not the first PDSCH in the time domain scheduled by the DCI, using the transmission beam of the first PDSCH in the time domain scheduled by the DCI as the transmission beam used for the PDSCH; If the time domain interval is less than the TimeDurationForQCL, and the PDSCH is the first PDSCH in the time domain scheduled by the DCI, and there is a transition interval symbol before the PDSCH data, and the sum of the time domain interval and the transition interval symbol is greater than or equal to the TimeDurationForQCL, using the transmission beam of the DCI as the transmission beam used for the PDSCH.

4. The method according to claim 1, characterized in that, The determining the transmission beam used for the PDSCH according to the time domain interval further includes: If the time domain interval is greater than or equal to the TimeDurationForQCL, and the PDSCH is the first PDSCH in the time domain scheduled by the DCI, using the transmission beam of the DCI as the transmission beam used for the PDSCH; If the time domain interval is greater than or equal to the TimeDurationForQCL, and the PDSCH is not the first PDSCH in the time domain scheduled by the DCI, determining the transmission beam used for the PDSCH according to the difference information between the PDSCH and the previous PDSCH with the smallest time domain interval among the PDSCHs scheduled by the DCI.

5. The method according to claim 4, wherein The determining the transmission beam used for the PDSCH according to the difference information between the PDSCH and the previous PDSCH with the smallest time domain interval among the PDSCHs scheduled by the DCI includes: Determine whether the transmission beam of the DCI is the same as the transmission beam used by the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs; Determine whether the time domain interval between the PDSCH and the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs is greater than or equal to n OFDM symbols or n milliseconds, where n is the number of OFDM symbols or the millisecond threshold; Determine whether the carrier of the PDSCH is the same as the carrier of the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs; Obtain the transmission beam of the PDSCH.

6. The method according to claim 5, characterized in that, The obtaining the transmission beam of the PDSCH includes: If the transmission beam of the DCI is the same as the transmission beam used by the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs, and the time domain interval between the PDSCH and the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs is less than n OFDM symbols or n milliseconds, and the carrier of the PDSCH is the same as the carrier of the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs, then use the transmission beam of the first PDSCH in the PDSCHs scheduled by the DCI as the transmission beam of the PDSCH, where n is a positive integer; Otherwise, use the transmission beam indicated by the DCI as the transmission beam of the PDSCH.

7. The method according to claim 1, characterized in that, The determining the transmission beam used by the PDSCH according to the time domain interval further includes: Determine whether multiple Transmission Configuration Indications (TCIs) are indicated in the DCI, where the multiple TCIs correspond to one or more PDSCHs in the PDSCHs scheduled by the DCI; If multiple TCIs are indicated in the DCI, and the time domain interval is greater than or equal to the TimeDurationForQCL, and the PDSCH is the first PDSCH in the time domain scheduled by the DCI, then use the transmission beam of the TCI corresponding to the PDSCH in the DCI as the transmission beam of the PDSCH; If multiple TCIs are indicated in the DCI, and the time domain interval is greater than or equal to the TimeDurationForQCL, and the PDSCH is not the first PDSCH in the time domain scheduled by the DCI, then determine the transmission beam used by the PDSCH according to the difference information between the PDSCH and the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs.

8. The method according to claim 7, further characterized in that, The determining the transmission beam used by the PDSCH according to the difference information between the PDSCH and the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs includes: Determine whether the transmission beam of the DCI is the same as the transmission beam used by the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs; Determine whether the time domain interval between the PDSCH and the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs is greater than or equal to n OFDM symbols or n milliseconds, where n is the number of OFDM symbols or the millisecond threshold; Determine whether the carrier of the PDSCH is the same as the carrier of the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs; Obtain the transmission beam of the PDSCH.

9. The method according to claim 8, further characterized in that, The obtaining of the transmission beam of the PDSCH includes: If the transmission beam of the DCI is the same as the transmission beam used by the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs, and the time domain interval between the PDSCH and the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs is less than n OFDM symbols or n milliseconds, and the carrier of the PDSCH is the same as the carrier of the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs, then use the transmission beam of the first PDSCH in the PDSCH scheduled by the DCI as the transmission beam of the PDSCH; Otherwise, use the transmission beam of the TCI corresponding to the PDSCH in the DCI as the transmission beam of the PDSCH.

10. The method according to claim 1, wherein The determining of the transmission beam used by the PDSCH according to the time domain interval further includes: Determine whether there is a TCI field in the DCI; If there is no TCI field in the DCI, and the time domain interval is greater than or equal to the TimeDurationForQCL, and the PDSCH is the first PDSCH in the time domain scheduled by the DCI, then use the beam of the TCI with the smallest activated ID available for the PDSCH in the activated subset bandwidth BWP of the scheduling cell as the transmission beam of the PDSCH; If there is no TCI field in the DCI, and the time domain interval is greater than or equal to the TimeDurationForQCL, and the PDSCH is not the first PDSCH in the time domain scheduled by the DCI, then determine the transmission beam used by the PDSCH according to the difference information between the PDSCH and the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs.

11. The method according to claim 10, further characterized in that, The determining of the transmission beam used by the PDSCH according to the difference information between the PDSCH and the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs includes: Determine whether the transmission beam of the DCI is the same as the transmission beam used by the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs; Determine whether the time domain interval between the PDSCH and the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI is greater than or equal to n OFDM symbols or n milliseconds, where n is the number of OFDM symbols or the millisecond threshold; Determine whether the carrier of the PDSCH is the same as the carrier of the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI; Obtain the transmission beam of the PDSCH.

12. The method according to claim 11, further characterized in that, The obtaining the transmission beam of the PDSCH includes: If the transmission beam of the DCI is the same as the transmission beam used by the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI, and the time domain interval between the PDSCH and the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI is less than n OFDM symbols or n milliseconds, and the carrier of the PDSCH is the same as the carrier of the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI, then use the transmission beam of the first PDSCH among the PDSCHs scheduled by the DCI as the transmission beam of the PDSCH; Otherwise, use the beam of the TCI with the smallest activated ID available for the PDSCH in the activated subset bandwidth BWP of the scheduling cell as the transmission beam of the PDSCH.

13. An apparatus for determining a transmission beam of a Physical Downlink Shared Channel (PDSCH), characterized in that, Including a memory, a transceiver, and a processor: The memory is used to store computer programs; the transceiver is used to transmit and receive data under the control of the processor; the processor is used to read the computer programs in the memory and perform the following operations: Receive downlink control information DCI, where the DCI is used to schedule multiple PDSCHs; Determine the time domain interval between the PDSCH and the DCI among the multiple PDSCHs; Determine the transmission beam used by the PDSCH according to the time domain interval; After receiving the downlink control information DCI, it further includes: If there is a PDCCH overlapping with the PDSCH in the time domain, use the transmission beam of the PDCCH as the transmission beam of the PDSCH; The determining the transmission beam used by the PDSCH according to the time domain interval includes: If the time domain interval is less than the quasi - co - located duration TimeDurationForQCL, and the PDSCH is the first PDSCH in the time domain scheduled by the DCI, then use the transmission beam of the control resource set CORESET that is closest to the PDSCH and has the smallest ID as the transmission beam used by the PDSCH.

14. The device according to claim 13, characterized in that, The time domain interval is the number of orthogonal frequency division multiplexing (OFDM) symbols by which the DCI and the PDSCH are separated in the time domain.

15. The device according to claim 13, characterized in that, The determining the transmission beam used by the PDSCH according to the time domain interval further includes: If the time domain interval is less than the quasi - co - location duration TimeDurationForQCL, and the PDSCH is not the first PDSCH in the time domain scheduled by the DCI, then use the transmission beam of the first PDSCH in the time domain scheduled by the DCI as the transmission beam used by the PDSCH; If the time domain interval is less than the TimeDurationForQCL, and the PDSCH is the first PDSCH in the time domain scheduled by the DCI, and there is a conversion interval symbol before the PDSCH data, and the sum of the time domain interval and the conversion interval symbol is greater than or equal to the TimeDurationForQCL, then use the transmission beam of the DCI as the transmission beam of the PDSCH.

16. The device according to claim 13, characterized in that The determining the transmission beam used by the PDSCH according to the time domain interval further includes: If the time domain interval is greater than or equal to the TimeDurationForQCL, and the PDSCH is the first PDSCH in the time domain scheduled by the DCI, then use the transmission beam of the DCI as the transmission beam of the PDSCH; If the time domain interval is greater than or equal to the TimeDurationForQCL, and the PDSCH is not the first PDSCH in the time domain scheduled by the DCI, then determine the transmission beam used by the PDSCH according to the difference information between the PDSCH and the previous PDSCH with the smallest time domain interval from the PDSCH among the PDSCHs scheduled by the DCI.

17. The device according to claim 16, characterized in that, The determining the transmission beam used by the PDSCH according to the difference information between the PDSCH and the previous PDSCH with the smallest time domain interval from the PDSCH among the PDSCHs scheduled by the DCI includes: Determine whether the transmission beam of the DCI is the same as the transmission beam used by the previous PDSCH with the smallest time domain interval from the PDSCH among the PDSCHs scheduled by the DCI; Determine whether the time domain interval between the PDSCH and the previous PDSCH with the smallest time domain interval from the PDSCH among the PDSCHs scheduled by the DCI is greater than or equal to n OFDM symbols or n milliseconds, where n is the number of OFDM symbols or the millisecond threshold; Determine whether the carrier of the PDSCH is the same as the carrier of the previous PDSCH with the smallest time domain interval from the PDSCH among the PDSCHs scheduled by the DCI; Obtain the transmission beam of the PDSCH.

18. The device according to claim 17, wherein The obtaining the transmission beam of the PDSCH includes: If the transmission beam of the DCI is the same as the transmission beam used for the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs, and the time domain interval between the PDSCH and the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs is less than n OFDM symbols or n milliseconds, and the carrier of the PDSCH is the same as the carrier of the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs, then use the transmission beam of the first PDSCH among the PDSCHs scheduled by the DCI as the transmission beam of the PDSCH, where n is a positive integer; Otherwise, use the transmission beam indicated by the DCI as the transmission beam of the PDSCH.

19. The device according to claim 13, characterized in that, The determining the transmission beam used for the PDSCH according to the time domain interval further includes: Determine whether multiple transmission configuration indicators (TCIs) are indicated in the DCI, where the multiple TCIs correspond to one or more PDSCHs among the PDSCHs scheduled by the DCI; If multiple TCIs are indicated in the DCI, and the time domain interval is greater than or equal to the TimeDurationForQCL, and the PDSCH is the first PDSCH in the time domain scheduled by the DCI, then use the transmission beam of the TCI corresponding to the PDSCH in the DCI as the transmission beam of the PDSCH; If multiple TCIs are indicated in the DCI, and the time domain interval is greater than or equal to the TimeDurationForQCL, and the PDSCH is not the first PDSCH in the time domain scheduled by the DCI, then determine the transmission beam used for the PDSCH according to the difference information between the PDSCH and the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs.

20. The device according to claim 19, further characterized in that, The determining the transmission beam used for the PDSCH according to the difference information between the PDSCH and the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs includes: Determine whether the transmission beam of the DCI is the same as the transmission beam used for the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs; Determine whether the time domain interval between the PDSCH and the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs is greater than or equal to n OFDM symbols or n milliseconds, where n is the number of OFDM symbols or the millisecond threshold; Determine whether the carrier of the PDSCH is the same as the carrier of the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs; Obtain the transmission beam of the PDSCH.

21. The device according to claim 20, further characterized in that, The obtaining the transmission beam of the PDSCH includes: If the transmission beam of the DCI is the same as the transmission beam used for the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI, and the time domain interval between the PDSCH and the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI is less than n OFDM symbols or n milliseconds, and the carrier of the PDSCH is the same as the carrier of the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI, then use the transmission beam of the first PDSCH among the PDSCHs scheduled by the DCI as the transmission beam of the PDSCH; Otherwise, use the transmission beam of the TCI corresponding to the PDSCH in the DCI as the transmission beam of the PDSCH.

22. The device according to claim 13, characterized in that, The determining the transmission beam used for the PDSCH according to the time domain interval further includes: Determine whether there is a TCI field in the DCI; If there is no TCI field in the DCI, and the time domain interval is greater than or equal to the TimeDurationForQCL, and the PDSCH is the first PDSCH in the time domain scheduled by the DCI, then use the beam of the TCI with the smallest activated ID available for the PDSCH in the activated subset bandwidth BWP of the scheduling cell as the transmission beam of the PDSCH; If there is no TCI field in the DCI, and the time domain interval is greater than or equal to the TimeDurationForQCL, and the PDSCH is not the first PDSCH in the time domain scheduled by the DCI, then determine the transmission beam used for the PDSCH according to the difference information between the PDSCH and the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI.

23. The device according to claim 22, further characterized in that, The determining the transmission beam used for the PDSCH according to the difference information between the PDSCH and the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI includes: Determine whether the transmission beam of the DCI is the same as the transmission beam used for the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI; Determine whether the time domain interval between the PDSCH and the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI is greater than or equal to n OFDM symbols or n milliseconds, where n is the number of OFDM symbols or the millisecond threshold; Determine whether the carrier of the PDSCH is the same as the carrier of the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI; Obtain the transmission beam of the PDSCH.

24. The device according to claim 23, further characterized in that, The obtaining the transmission beam of the PDSCH includes: If the transmission beam of the DCI is the same as the transmission beam used by the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI, and the time domain interval between the PDSCH and the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI is less than n OFDM symbols or n milliseconds, and the carrier of the PDSCH is the same as the carrier of the previous PDSCH with the smallest time domain interval from the PDSCH scheduled by the DCI among the PDSCHs scheduled by the DCI, then use the transmission beam of the first PDSCH among the PDSCHs scheduled by the DCI as the transmission beam of the PDSCH; Otherwise, use the beam of the TCI with the smallest activated ID available for the PDSCH in the activated subset bandwidth BWP of the scheduling cell as the transmission beam of the PDSCH.

25. A device for determining a physical downlink shared channel (PDSCH) transmission beam, characterized in that, Comprising: A downlink control information receiving unit, configured to receive downlink control information DCI, where the DCI is used to schedule multiple PDSCHs; A time domain interval obtaining unit, configured to determine the time domain interval between the PDSCH and the DCI among the multiple PDSCHs; A transmission beam obtaining unit, configured to determine the transmission beam used by the PDSCH according to the time domain interval; After receiving the downlink control information DCI, the apparatus is further configured to: If there is a PDCCH overlapping with the PDSCH in the time domain, use the transmission beam of the PDCCH as the transmission beam of the PDSCH; The transmission beam obtaining unit is specifically configured to: If the time domain interval is less than the quasi-co-location duration TimeDurationForQCL, and the PDSCH is the first PDSCH in the time domain scheduled by the DCI, then use the transmission beam of the control resource set CORESET that is closest to the PDSCH and has the smallest ID as the transmission beam used by the PDSCH.

26. A processor-readable storage medium, characterized in that, The processor-readable storage medium stores a processor-executable computer program for executing the method according to any one of claims 1 to 12.

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