CN114793153A

CN114793153A - Aperiodic reference signal transmission method and related device

Info

Publication number: CN114793153A
Application number: CN202110106667.XA
Authority: CN
Inventors: 周欢
Original assignee: Beijing Ziguang Zhanrui Communication Technology Co Ltd
Current assignee: Beijing Ziguang Zhanrui Communication Technology Co Ltd
Priority date: 2021-01-26
Filing date: 2021-01-26
Publication date: 2022-07-26

Abstract

The embodiment of the application discloses a method and a related device for transmitting an aperiodic reference signal. In the method, when one or more HARQ-NACK is contained in an uplink control channel, network equipment or terminal equipment sends an aperiodic reference signal, and the spatial beam direction of the aperiodic reference signal is determined by the spatial beam direction of a downlink channel. The method and the device are beneficial for the network equipment to obtain more accurate channel state information, thereby improving the accuracy of scheduling.

Description

Aperiodic reference signal transmission method and related device

Technical Field

The present application relates to the field of communications technologies, and in particular, to a method and a related apparatus for aperiodic reference signal transmission.

Background

In wireless communication, after acquiring a Physical Downlink Control Channel (PDCCH) from a network device, a terminal device may decode data information in a Physical Downlink Shared Channel (PDSCH) scheduled by Downlink Control Information (DCI) carried by the PDCCH. Feeding back a hybrid automatic repeat request, HARQ-Negative Acknowledgement (NACK), to the network device when the terminal device erroneously decodes to inform the network device of the decoding error; the network device or the terminal device may transmit the aperiodic reference signal. How to determine the spatial beam direction of the aperiodic reference signal sent by the network device or the terminal device becomes an urgent problem to be solved.

Disclosure of Invention

The embodiment of the application provides an aperiodic reference signal transmission method and a related device, which can determine the airspace beam direction of an aperiodic reference signal sent by network equipment or terminal equipment, and are beneficial to improving the speed and accuracy of obtaining channel state information by the network equipment, thereby improving the scheduling accuracy.

In a first aspect, an embodiment of the present application provides a method for aperiodic reference signal transmission, where the method includes: the network equipment receives an uplink control channel from the terminal equipment;

the network equipment sends an aperiodic reference signal when the uplink control channel contains one or more hybrid automatic repeat request (HARQ) -Negative Acknowledgement (NACK);

the spatial beam direction of the aperiodic reference signal is determined based on the spatial beam direction of the downlink channel.

In an optional embodiment, the one or more HARQ-NACKs are sent by the terminal device in case of decoding errors of one or more physical downlink shared channels, PDSCHs, sent by the network device.

In an optional embodiment, the time domain resource of the downlink channel overlaps with the time domain resource of the aperiodic reference signal.

In an optional embodiment, the downlink channel is a PDSCH corresponding to the HARQ-NACK.

In an optional embodiment, the downlink channel is a PDSCH scheduled by the last downlink control information DCI; the last DCI is a DCI occupying a time domain resource most backward among a plurality of DCIs associated with the plurality of HARQ-NACKs.

In an optional implementation manner, the last DCI is a DCI that occupies a rearmost time domain resource in the DCI scheduling the PDSCHs corresponding to the multiple HARQ-NACKs, respectively.

In an optional embodiment, for each cell having HARQ-NACK feedback, the last DCI is a DCI occupying a rearmost time domain resource in a DCI corresponding to one or more HARQ-NACKs belonging to the cell in the plurality of HARQ-NACKs.

In an optional embodiment, the downlink channel is a PDSCH with a smallest PDSCH configuration index; the PDSCH with the smallest PDSCH configuration index is the PDSCH with the smallest PDSCH configuration index in the PDSCHs associated with the HARQ-NACKs.

In an optional embodiment, the PDSCH with the smallest PDSCH configuration index is the PDSCH with the smallest PDSCH configuration index among the PDSCHs corresponding to the plurality of HARQ-NACKs, respectively.

In an optional embodiment, for each cell where HARQ-NACK feedback exists, the PDSCH with the smallest PDSCH configuration index is one or more HARQ-NACKs belonging to the cell in the plurality of HARQ-NACKs, and the PDSCH with the smallest PDSCH configuration index in the corresponding PDSCH.

In a second aspect, an embodiment of the present application provides an aperiodic reference signal transmission method, where the method includes: the terminal equipment sends an uplink control channel to the network equipment;

the terminal equipment receives an aperiodic reference signal from the network equipment when the uplink control channel contains one or more hybrid automatic repeat request (HARQ) -Negative Acknowledgement (NACK);

In an optional implementation manner, the time domain resource of the downlink channel overlaps with the time domain resource of the aperiodic reference signal.

In an optional implementation manner, the downlink channel is a PDSCH corresponding to the HARQ-NACK.

In an optional embodiment, for each cell where HARQ-NACK feedback exists, the last DCI is a DCI occupying a latest time domain resource among DCIs corresponding to one or more HARQ-NACKs belonging to the cell among the plurality of HARQ-NACKs.

In an optional embodiment, the downlink channel is a PDSCH with a smallest PDSCH configuration index; the PDSCH with the smallest PDSCH configuration index is the PDSCH with the smallest PDSCH configuration index in the plurality of PDSCHs associated with the plurality of HARQ-NACKs.

In a third aspect, an embodiment of the present application provides an aperiodic reference signal transmission method, including: the terminal equipment sends an uplink control channel to the network equipment;

the terminal equipment sends an aperiodic reference signal when the uplink control channel contains one or more hybrid automatic repeat request (HARQ) -Negative Acknowledgement (NACK);

In an optional implementation manner, the one or more HARQ-NACKs are sent by the terminal device when decoding errors occur on one or more Physical Downlink Shared Channel (PDSCH) sent by the network device.

In an optional implementation manner, the last DCI is a DCI which occupies a most rear time domain resource among DCIs scheduling PDSCHs corresponding to the multiple HARQ-NACKs, respectively.

In an optional embodiment, the PDSCH with the smallest PDSCH configuration index is the PDSCH with the smallest PDSCH configuration index among PDSCHs corresponding to the multiple HARQ-NACKs, respectively.

In a fourth aspect, an embodiment of the present application provides a method for aperiodic reference signal transmission, where the method includes: the network equipment receives an uplink control channel from the terminal equipment;

the network equipment receives an aperiodic reference signal from the terminal equipment when the uplink control channel contains one or more hybrid automatic repeat request (HARQ) -Negative Acknowledgement (NACK);

In a fifth aspect, an embodiment of the present application provides an aperiodic reference signal transmission apparatus, where the aperiodic reference signal transmission apparatus includes:

a receiving unit, configured to receive an uplink control channel from a terminal device;

a sending unit, configured to send an aperiodic reference signal when the uplink control channel includes one or more hybrid automatic repeat request HARQ-negative acknowledgements NACK;

In addition, in this aspect, reference may be made to the related contents of the first aspect for other alternative embodiments of the aperiodic reference signal transmission device, and details are not described here.

In a sixth aspect, an embodiment of the present application provides an aperiodic reference signal transmission apparatus, including:

a sending unit, configured to send an uplink control channel to a network device;

a receiving unit, configured to receive an aperiodic reference signal from the network device when one or more hybrid automatic repeat request HARQ-negative acknowledgements, NACKs, are included in the uplink control channel;

In addition, in this aspect, other alternative embodiments of the aperiodic reference signal transmission device can be found in the relevant content of the above second aspect, and will not be described in detail here.

In a seventh aspect, an embodiment of the present application provides an aperiodic reference signal transmission apparatus, where the aperiodic reference signal transmission apparatus includes:

the sending unit is further configured to send an aperiodic reference signal when the uplink control channel includes one or more hybrid automatic repeat request HARQ-negative acknowledgements NACK;

In addition, in this aspect, other alternative embodiments of the aperiodic reference signal transmission device can be referred to the relevant content of the third aspect, and are not described in detail here.

In an eighth aspect, an embodiment of the present application provides an aperiodic reference signal transmission apparatus, including:

the receiving unit is further configured to receive an aperiodic reference signal from the terminal device when one or more hybrid automatic repeat request HARQ-negative acknowledgements, NACKs, are included in the uplink control channel;

In addition, in this aspect, reference may be made to the relevant contents of the fourth aspect in other alternative embodiments of the aperiodic reference signal transmission device, and details are not described here.

In a ninth aspect, an embodiment of the present application provides a network device, which includes a processor and a memory, where the processor and the memory are connected to each other, where the memory is used to store a computer program, and the computer program includes program instructions, and the processor is configured to call the program instructions, to execute the method of the first aspect, or to execute the method of the fourth aspect.

In a tenth aspect, an embodiment of the present application provides a terminal device, where the terminal device includes a processor and a memory, and the processor and the memory are connected to each other, where the memory is used to store a computer program, and the computer program includes program instructions, and the processor is configured to call the program instructions, execute the method according to the second aspect, or execute the method according to the third aspect.

In an eleventh aspect, embodiments of the present application provide a chip, where the chip includes a processor and a data interface, and the processor reads instructions stored on a memory through the data interface to perform the method according to the first aspect, or perform the method according to the second aspect, or perform the method according to the third aspect, or perform the method according to the fourth aspect.

In a twelfth aspect, an embodiment of the present application provides a chip module, where the chip module includes the chip as described in the eleventh aspect.

In a thirteenth aspect, embodiments of the present application provide a computer-readable storage medium storing a computer program, the computer program comprising program instructions that, when executed by a processor, cause the processor to perform the method according to the first aspect, or perform the method according to the second aspect, or perform the method according to the third aspect, or perform the method according to the fourth aspect.

In the embodiment of the present application, when an uplink control channel includes one or more HARQ-NACKs, a network device or a terminal device transmits an aperiodic reference signal, where a spatial beam direction of the aperiodic reference signal may be determined based on a spatial beam direction of the downlink channel. Therefore, the method not only can send the aperiodic reference signal when the uplink control channel comprises HARQ-NACK, but also can quickly determine the spatial beam direction of the aperiodic reference signal based on the spatial beam direction of the downlink channel. Therefore, the method is beneficial to improving the speed and the accuracy of the network equipment for obtaining the channel state information, and further improving the accuracy of scheduling.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

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

fig. 2 is a schematic flowchart of an aperiodic reference signal transmission method according to an embodiment of the present application;

fig. 3 is a schematic flowchart of another aperiodic reference signal transmission method provided in an embodiment of the present application;

fig. 4 is a schematic structural diagram of an aperiodic reference signal transmission device according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of another aperiodic reference signal transmission device provided in an embodiment of the present application;

fig. 6 is a schematic structural diagram of another aperiodic reference signal transmission apparatus provided in the embodiment of the present application;

fig. 7 is a schematic structural diagram of a network device according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of a terminal device according to an embodiment of the present application;

fig. 9 is a schematic structural diagram of a chip according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.

A beam transmission method, in which a signal is transmitted using a specific beam in a certain direction, rather than transmitting a signal in all directions, is introduced for signal transmission in a New Radio (NR). Procedures such as beam management, beam indication, beam recovery and the like are also configured in the NR to support beam transmission; the protocol specifies that the beam Indication indicates the characteristics of signal transmission through Transmission Configuration Indication (TCI), wherein the characteristics of signal transmission include Doppler shift (Doppler shift), Doppler spread (Doppler spread), average delay (average delay), delay spread (delay spread), Spatial Rx parameter (beam), and the like. The terminal device may configure a plurality of TCI states (states) to indicate transmission characteristics of a Physical Downlink Shared Channel (PDSCH) scheduled by a Physical Downlink Control Channel (PDCCH), that is, a spatial beam direction of the PDSCH may be determined based on the TCI state associated with the PDSCH. Wherein the number of configured TCI states is determined based on the configuration capability of the terminal device.

Wherein, one TCI state includes a quasi co-location (QCL) relationship of a PDSCH Demodulation Reference Signal (DMRS) and one or two Reference signals. The Reference Signal may be a Channel State Information (CSI) Reference Signal (RS) or a Sounding Reference Signal (SRS). PDSCH DMRS and the QCL type of the reference signal are configured by higher layer signaling and activated by Media Access Control (MAC) signaling. The QCL types include QCL-type A (TypeA), QCL-type B (TypeB), QCL-type C (TypeC), or QCL-type D (TypeD), among others. The transmission characteristics included in each QCL type are specifically as follows:

'QCL-TypeA': { Doppler shift, Doppler spread, average delay, delay spread };

'QCL-TypeB': { Doppler shift, Doppler spread };

'QCL-TypeC': { Doppler shift, Doppler spread delay };

'QCL-type': { Spatial Rx parameter.

Hybrid Automatic Repeat reQuest (HARQ) -Negative Acknowledgement (NACK) is fed back to the network device when the terminal device decodes the PDSCH erroneously from the network device, and the HARQ-NACK can be used to inform the network device of the decoding error.

The application provides a transmission method of an aperiodic reference signal, which aims at downlink transmission; the method can determine the airspace wave beam direction of the non-periodic reference signal, is beneficial to improving the speed and the accuracy of the network equipment for obtaining the downlink channel state information, and further improves the accuracy of scheduling.

The application also provides a transmission method of the non-periodic reference signal, which aims at the uplink transmission; the method can determine the airspace wave beam direction of the non-periodic reference signal, is beneficial to improving the speed and the accuracy of the network equipment for obtaining the uplink channel state information, and further improves the accuracy of scheduling.

The aperiodic reference signal transmission method provided by the embodiment of the application can be applied to the communication system shown in fig. 1. Fig. 1 is a schematic structural diagram of a communication system according to an embodiment of the present disclosure. The communication system may include, but is not limited to, one or more network devices, one or more terminal devices, such as a network device 101 and a terminal device 102 shown in fig. 1, wherein the terminal device may establish a wireless link with the network device for communication. The number and configuration of the devices shown in fig. 1 are for example and do not constitute a limitation on the embodiments of the present application.

In this embodiment, a terminal device may also be referred to as a User Equipment (UE). The terminal device may be a mobile phone (mobile phone), a tablet computer (Pad), a computer with wireless transceiving function, a Virtual Reality (VR) terminal, an Augmented Reality (AR) terminal, a wireless terminal in industrial control (industrial control), a wireless terminal in unmanned driving (self driving), a wireless terminal in remote medical treatment (remote medical), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation safety (transportation safety), a wireless terminal in smart city (smart city), and the like.

In this embodiment, the network device may be a device with a wireless transceiving function or a chip disposed on the device, and the network device includes but is not limited to: an evolved Node B (eNB), a Radio Network Controller (RNC), a Node B (NB), a network equipment controller (BSC), a network equipment transceiver station (BTS), a home network equipment (e.g., home evolved Node B or home Node B, HNB), a baseband unit (BBU), a wireless relay Node, a wireless backhaul Node, a transmission point (TRP or transmission point, TP), etc., and may also be equipment used in systems such as 4G, 5G, 6G, etc., which are not limited herein.

Referring to fig. 2, fig. 2 is a flowchart illustrating an aperiodic reference signal transmission method according to an embodiment of the present application, where the aperiodic reference signal transmission method can be applied to the communication system shown in fig. 1 and is explained from the perspective of interaction between a network device and a terminal device. The aperiodic reference signal transmission method comprises the following steps:

s201, a terminal device sends an uplink control channel to a network device;

the Uplink Control Channel may be a Physical Uplink Control Channel (PUCCH).

S202, the network equipment receives an uplink control channel from the terminal equipment;

s203, when the uplink control channel comprises one or more hybrid automatic repeat request HARQ-Negative Acknowledgement (NACK), the network equipment sends an aperiodic reference signal to the terminal equipment;

in an alternative embodiment, the one or more HARQ-NACKs are sent by the terminal device in response to one or more PDSCH decoding errors sent by the network device, but not in response to padding; the HARQ-NACK in the embodiments of the present application may also be referred to as a valid HARQ-NACK. The PDSCH is scheduled by Downlink Control Information (DCI) carried on the PDCCH, and the DCI includes multiple parameter domains; the network device may transmit the DCI to the terminal device through the PDCCH. Optionally, the HARQ-NACK may be associated with an aperiodic reference signal to inform the network device to send the aperiodic reference signal to the terminal device.

In an alternative embodiment, the Aperiodic Reference Signal may be an Aperiodic (Aperiodic) Channel State Information (CSI) Reference Signal (RS), referred to as a-CSI-RS. Correspondingly, HARQ-NACK association with one aperiodic reference signal may be: HARQ-NACK is associated with one A-CSI-RS. The associated a-CSI-RS may also be an a-CSI-RS corresponding to an associated a-CSI report (report).

In an alternative embodiment, the spatial beam direction of the aperiodic reference signal is determined based on the spatial beam direction of the downlink channel. Optionally, if there is a channel in which the time domain resource overlaps with the time domain resource of the aperiodic reference signal, the channel may be used as the downlink channel. That is, the spatial beam direction of the aperiodic reference signal is determined based on the spatial beam direction of the channel, and the network device transmits the aperiodic reference signal in the determined spatial beam direction.

In an optional embodiment, when the uplink control channel includes one HARQ-NACK, the downlink channel is a PDSCH corresponding to the HARQ-NACK, that is, the spatial beam direction of the aperiodic reference signal is determined based on the spatial beam direction of the PDSCH corresponding to the HARQ-NACK. In addition, the network device may send the aperiodic reference signal to the terminal device by: the network device sends the aperiodic reference signal to the terminal device by using the same carrier as the PDSCH corresponding to the HARQ-NACK, that is, the network device sends the aperiodic reference signal to the terminal device on the cell that feeds back the HARQ-NACK. The spatial beam direction of the PDSCH described herein may be determined based on the PDSCH related TCL state.

In an optional implementation manner, when the uplink control channel includes multiple HARQ-NACKs, the downlink channel is a PDSCH scheduled by the last DCI, and the spatial beam direction of the aperiodic reference signal is determined based on the spatial beam direction of the PDSCH scheduled by the last DCI. The last DCI is a DCI occupying a time domain resource rearmost among the plurality of DCIs associated with the plurality of HARQ-NACKs, that is, the last DCI is a DCI occupying a time domain resource rearmost among the plurality of DCIs, and the plurality of DCIs are DCIs associated with the plurality of HARQ-NACKs included in the uplink control channel. In this application, the DCI associated with the HARQ-NACKs refers to a DCI that schedules PDSCHs corresponding to the HARQ-NACKs included in an uplink control channel, or a DCI that schedules PDSCHs corresponding to some HARQ-NACKs in the HARQ-NACKs.

In an optional embodiment, the last DCI is a DCI that occupies a rearmost time domain resource in the DCI scheduling PDSCHs corresponding to the multiple HARQ-NACKs, respectively. That is to say, the last DCI is a DCI occupying a time domain resource at the rearmost position among the plurality of DCIs, and the plurality of DCIs are DCIs used to schedule PDSCHs corresponding to the plurality of HARQ-NACKs included in the uplink control channel, respectively.

For example, the DCI for scheduling the PDSCH corresponding to each of the plurality of HARQ-NACKs includes: DCI1 scheduling PDSCH1 corresponding to HARQ-NACK1, DCI2 scheduling PDSCH2 corresponding to HARQ-NACK2, and DCI3 scheduling PDSCH3 corresponding to HARQ-NACK 3; among DCI1, DCI2, and DCI3, DCI2 occupies the rearmost time domain resource; then the last DCI is DCI 2.

In an optional embodiment, for each cell where HARQ-NACK feedback exists, the last DCI is a DCI occupying the rearmost time domain resource among DCIs corresponding to one or more HARQ-NACKs belonging to the cell among the plurality of HARQ-NACKs. If the number of the HARQ-NACK belonging to the cell in the plurality of HARQ-NACK is one, the last DCI is the DCI corresponding to the HARQ-NACK belonging to the cell; and if the number of the HARQ-NACK belonging to the cell in the plurality of HARQ-NACK is more than one, the last DCI occupies the DCI with the most rear time domain resources in the DCI corresponding to the HARQ-NACK belonging to the cell. In the present application, the DCI corresponding to the HARQ-NACK refers to DCI for scheduling the PDSCH corresponding to the HARQ-NACK.

For example, taking cell 1 with HARQ-NACK feedback as an example, the plurality of HARQ-NACKs includes: HARQ-NACK1, HARQ-NACK2, HARQ-NACK3, the HARQ-NACK belonging to cell 1 comprising: HARQ-NACK1, HARQ-NACK 3; in DCI1 corresponding to HARQ-NACK1 and DCI3 corresponding to HARQ-NACK3, DCI3 occupies the most rear time domain resource; then, for cell 1, the last DCI is DCI 3.

In an optional embodiment, when the uplink control channel includes multiple HARQ-NACKs, the downlink channel is a PDSCH with a minimum PDSCH configuration index, that is, the spatial beam direction of the aperiodic reference signal is determined based on the spatial beam direction of the PDSCH with the minimum PDSCH configuration index. The PDSCH with the smallest PDSCH configuration index is the PDSCH with the smallest PDSCH configuration index among the PDSCHs associated with the HARQ-NACKs, that is, the PDSCH with the smallest PDSCH configuration index is the PDSCH with the smallest PDSCH configuration index among the PDSCHs associated with the HARQ-NACKs included in the uplink control channel. In this application, the multiple PDSCHs associated with the multiple HARQ-NACKs refer to PDSCHs corresponding to the multiple HARQ-NACKs included in the uplink control channel, or refer to PDSCHs corresponding to some HARQ-NACKs in the multiple HARQ-NACKs.

In an optional embodiment, the PDSCH with the smallest PDSCH configuration index is the PDSCH with the smallest PDSCH configuration index among PDSCHs corresponding to multiple HARQ-NACKs, respectively. Optionally, the PDSCH may be a Semi-Persistent Scheduling (SPS) PDSCH, referred to as SPS PDSCH. Accordingly, the one or more HARQ-NACKs may be transmitted by the terminal device when the one or more SPS PDSCH decoding errors are transmitted by the terminal device with respect to the network device.

For example, the PDSCHs corresponding to the plurality of HARQ-NACKs include: PDSCH1 corresponding to HARQ-NACK1, PDSCH2 corresponding to HARQ-NACK2, and PDSCH3 corresponding to HARQ-NACK 3; the PDSCH configuration index of PDSCH1 is 1, the PDSCH configuration index of PDSCH2 is 0, and the PDSCH configuration index of PDSCH3 is 2; then, the PDSCH with the smallest PDSCH configuration index is PDSCH 2.

In an optional embodiment, for each cell where HARQ-NACK feedback exists, the PDSCH with the smallest PDSCH configuration index is one or more HARQ-NACKs belonging to the cell among a plurality of HARQ-NACKs, and the PDSCH with the smallest PDSCH configuration index among the corresponding PDSCHs. If the number of the HARQ-NACK which belongs to the cell in the plurality of HARQ-NACK is one, the PDSCH with the minimum PDSCH configuration index is the PDSCH corresponding to the HARQ-NACK which belongs to the cell; and if the number of the HARQ-NACKs belonging to the cell in the plurality of HARQ-NACKs is more than one, the PDSCH with the smallest PDSCH configuration index is the PDSCH with the smallest PDSCH configuration index in the PDSCHs corresponding to the HARQ-NACK belonging to the cell.

For example, taking cell 1 with HARQ-NACK feedback as an example, the plurality of HARQ-NACKs includes: HARQ-NACK1, HARQ-NACK2, HARQ-NACK3, the HARQ-NACK belonging to cell 1 comprising: HARQ-NACK2, HARQ-NACK 3; in the PDSCH2 corresponding to HARQ-NACK2 and the PDSCH3 corresponding to HARQ-NACK3, the PDSCH configuration index of PDSCH2 is 1, and the PDSCH configuration index of PDSCH3 is 0; then, for cell 1, the PDSCH with the smallest PDSCH configuration index is PDSCH 3.

In an alternative embodiment, the number of cells in which HARQ-NACK feedback exists may be one or more. If the number of the cells with the HARQ-NACK feedback is one, the network equipment sends an aperiodic reference signal to the terminal equipment, wherein the spatial beam direction of the aperiodic reference signal is determined based on the spatial beam direction of the PDSCH scheduled by the last DCI in the cell, or the spatial beam direction of the aperiodic reference signal is determined based on the spatial beam direction of the PDSCH with the minimum PDSCH configuration index in the cell. If the number of the cells with the HARQ-NACK feedback is multiple, the network equipment sends multiple aperiodic reference signals to the terminal equipment, wherein the spatial beam directions of the multiple aperiodic reference signals are respectively determined based on the spatial beam direction of the PDSCH scheduled by the last DCI in each cell with the HARQ-NACK feedback, or the spatial beam directions of the multiple aperiodic reference signals are respectively determined based on the spatial beam direction of the PDSCH with the minimum PDSCH configuration index in each cell with the HARQ-NACK feedback.

For example, in a scenario where the number of cells in which HARQ-NACK feedback exists is multiple, the spatial beam directions of multiple aperiodic reference signals are determined based on the PDSCH scheduled by the last DCI in each cell in which HARQ-NACK feedback exists, respectively. The cells where HARQ-NACK feedback exists include: cell 1, cell 2; wherein, for cell 1, the last DCI is DCI 1; for cell 2, the last DCI is DCI 2; then, the two aperiodic reference signals sent by the network device to the terminal device include: aperiodic reference signal 1 and aperiodic reference signal 2, where the spatial beam direction of aperiodic reference signal 1 is determined based on the spatial beam direction of PDSCH1 scheduled by DCI1, and the spatial beam direction of aperiodic reference signal 2 is determined based on the spatial beam direction of PDSCH2 scheduled by DCI 2.

It can be seen that, in the aperiodic reference signal transmission method, when an uplink control channel includes one HARQ-NACK, the network device sends an aperiodic reference signal, and a spatial beam direction of the aperiodic reference signal is determined based on a spatial beam direction of a PDSCH corresponding to the HARQ-NACK. When the uplink control channel comprises a plurality of HARQ-NACKs, the network equipment sends an aperiodic reference signal, and the spatial beam direction of the aperiodic reference signal is determined based on the spatial beam direction of PDSCH corresponding to part of the HARQ-NACKs in the plurality of HARQ-NACKs. The embodiment solves the problem that whether the spatial beam directions of the aperiodic reference signals sent to the terminal equipment by the network equipment triggered by one HARQ-NACK and a plurality of HARQ-NACKs are the same or not.

S204, the terminal equipment receives the non-periodic reference signal from the network equipment;

optionally, after the terminal device receives the aperiodic reference signal from the network device, the terminal device may further perform: the terminal equipment determines the state information of a downlink channel according to the aperiodic reference signal; and the terminal equipment sends the downlink channel state information to the network equipment.

It can be seen that, in the aperiodic reference signal transmission method, the network device receives an uplink control channel from the terminal device, and when the uplink control channel includes one or more HARQ-NACKs, the network device transmits an aperiodic reference signal, where a spatial beam direction of the aperiodic reference signal can be determined based on a spatial beam direction of a downlink channel. Therefore, the method not only can send the aperiodic reference signal when the uplink control channel comprises HARQ-NACK, but also can rapidly determine the spatial beam direction of the aperiodic reference signal based on the spatial beam direction of the downlink channel. Therefore, the method is beneficial to improving the speed and the accuracy of the network equipment for obtaining the downlink channel state information, and further improving the scheduling accuracy.

Referring to fig. 3, fig. 3 is a schematic flowchart of another aperiodic reference signal transmission method according to an embodiment of the present application. The aperiodic reference signal transmission method can be applied to the communication system shown in fig. 1, and is illustrated by the interaction between the network device and the terminal device. The aperiodic reference signal transmission method comprises the following steps:

s301, the terminal equipment sends an uplink control channel to the network equipment;

wherein the uplink control channel may be a PUCCH.

S302, the network equipment receives an uplink control channel from the terminal equipment;

s303, when the uplink control channel comprises one or more hybrid automatic repeat request HARQ-Negative Acknowledgement (NACK), the terminal equipment sends an aperiodic reference signal;

in an alternative embodiment, the one or more HARQ-NACKs are transmitted by the terminal device in response to one or more PDSCH decoding errors transmitted by the network device. Optionally, the HARQ-NACK may be associated with an aperiodic reference signal to inform the network device to receive the aperiodic reference signal from the terminal device.

In an alternative embodiment, the Aperiodic Reference Signal may be an Aperiodic channel Sounding Reference Signal (SRS), referred to as an a-SRS. Correspondingly, the HARQ-NACK associated with one aperiodic reference signal may be: the HARQ-NACK is associated with one A-SRS.

In an alternative embodiment, the spatial beam direction of the aperiodic reference signal is determined based on the spatial beam direction of the downlink channel. The spatial beam direction of the downlink channel may be determined by the TCI state of the downlink channel.

In an optional embodiment, when the uplink control channel includes one HARQ-NACK, the downlink channel is a PDSCH corresponding to the HARQ-NACK, that is, the spatial beam direction of the aperiodic reference signal is determined based on the spatial beam direction of the PDSCH corresponding to the HARQ-NACK. The sending, by the terminal device, the aperiodic reference signal to the network device may be: the terminal device sends the aperiodic reference signal to the network device by using the same carrier as the PDSCH corresponding to the HARQ-NACK, that is, the terminal device sends the aperiodic reference signal to the network device on the cell that feeds back the HARQ-NACK. The spatial beam direction of the PDSCH according to the present application may be determined based on the PDSCH-related TCL state.

In an optional embodiment, the last DCI is a DCI that occupies a rearmost time domain resource in the DCI scheduling PDSCHs corresponding to the multiple HARQ-NACKs, respectively. That is, the last DCI is a DCI occupying a time domain resource most behind a plurality of DCIs, and the plurality of DCIs are DCIs used to schedule PDSCHs corresponding to a plurality of HARQ-NACKs included in an uplink control channel, respectively.

In an optional embodiment, for each cell where HARQ-NACK feedback exists, the last DCI is a DCI occupying the rearmost time domain resource among DCIs corresponding to one or more HARQ-NACKs belonging to the cell among the plurality of HARQ-NACKs. If the number of the HARQ-NACK belonging to the cell in the plurality of HARQ-NACKs is one, the last DCI is the DCI corresponding to the HARQ-NACK belonging to the cell; and if the number of the HARQ-NACK belonging to the cell in the plurality of HARQ-NACKs is more, the last DCI is the DCI occupying the rearmost time domain resource in the DCI corresponding to the HARQ-NACK belonging to the cell. In the present application, the DCI corresponding to the HARQ-NACK refers to DCI for scheduling the PDSCH corresponding to the HARQ-NACK.

In an optional embodiment, when the uplink control channel includes multiple HARQ-NACKs, the downlink channel is a PDSCH with a smallest PDSCH allocation index, that is, the spatial beam direction of the aperiodic reference signal is determined based on the spatial beam direction of the PDSCH with the smallest PDSCH allocation index. The PDSCH with the smallest PDSCH configuration index is the PDSCH with the smallest PDSCH configuration index among the PDSCHs associated with the HARQ-NACKs, that is, the PDSCH with the smallest PDSCH configuration index is the PDSCH with the smallest PDSCH configuration index among the PDSCHs associated with the HARQ-NACKs included in the uplink control channel. In this application, the multiple PDSCHs associated with the multiple HARQ-NACKs refer to PDSCHs corresponding to the multiple HARQ-NACKs included in the uplink control channel, or refer to PDSCHs corresponding to some HARQ-NACKs in the multiple HARQ-NACKs.

In an optional embodiment, the PDSCH with the smallest PDSCH configuration index is the PDSCH with the smallest PDSCH configuration index among PDSCHs corresponding to multiple HARQ-NACKs, respectively. Optionally, the PDSCH may be an SPS PDSCH. Accordingly, the one or more HARQ-NACKs may be transmitted by the terminal device in response to one or more SPS PDSCH decoding errors transmitted by the network device.

In an optional embodiment, for each cell where HARQ-NACK feedback exists, the PDSCH with the smallest PDSCH configuration index is one or more HARQ-NACKs belonging to the cell among a plurality of HARQ-NACKs, and the PDSCH with the smallest PDSCH configuration index among the associated PDSCHs. If the number of the HARQ-NACK which belongs to the cell in the plurality of HARQ-NACK is one, the PDSCH with the minimum PDSCH configuration index is the PDSCH corresponding to the HARQ-NACK which belongs to the cell; and if the number of the HARQ-NACKs belonging to the cell in the plurality of HARQ-NACKs is more than one, the PDSCH with the smallest PDSCH configuration index is the PDSCH with the smallest PDSCH configuration index in the PDSCH corresponding to the HARQ-NACK belonging to the cell.

In an alternative embodiment, the number of cells in which HARQ-NACK feedback is present may be one or more. If the number of the cells with the HARQ-NACK feedback is one, the terminal device sends an aperiodic reference signal to the network device, where a spatial beam direction of the aperiodic reference signal is determined based on a spatial beam direction of a PDSCH scheduled by a last DCI in the cell, or the spatial beam direction of the aperiodic reference signal is determined based on a spatial beam direction of a PDSCH with a smallest PDSCH configuration index in the cell. If the number of the cells with the HARQ-NACK feedback is multiple, the terminal device sends multiple aperiodic reference signals to the network device, where spatial beam directions of the multiple aperiodic reference signals are determined based on a spatial beam direction of a PDSCH scheduled by a last DCI in each cell with the HARQ-NACK feedback, or the spatial beam directions of the multiple aperiodic reference signals are determined based on a spatial beam direction of a PDSCH with a smallest PDSCH configuration index in each cell with the HARQ-NACK feedback.

It can be seen that, in the aperiodic reference signal transmission method, when an uplink control channel includes one HARQ-NACK, the terminal device sends an aperiodic reference signal, and a spatial beam direction of the aperiodic reference signal is determined based on a spatial beam direction of a PDSCH corresponding to the HARQ-NACK. When the uplink control channel comprises a plurality of HARQ-NACKs, the terminal equipment sends an aperiodic reference signal, and the spatial beam direction of the aperiodic reference signal is determined based on the spatial beam direction of a PDSCH corresponding to a part of HARQ-NACKs in the plurality of HARQ-NACKs. The embodiment solves the problem that whether the spatial beam directions of the non-periodic reference signals sent to the network equipment by the terminal equipment triggered by one HARQ-NACK and a plurality of HARQ-NACKs are the same or not.

S304, the network equipment receives the non-periodic reference signal from the terminal equipment;

optionally, after the network device receives the aperiodic reference signal from the terminal device, the network device may further perform: and the network equipment determines the uplink channel state information according to the aperiodic reference signal.

Therefore, in the aperiodic reference signal transmission method, the terminal device sends an uplink control channel to the network device; when the uplink control channel comprises one or more HARQ-NACK (hybrid automatic repeat request-negative acknowledgement), the terminal equipment sends a non-periodic reference signal; the spatial beam direction of the aperiodic reference signal can be determined based on the spatial beam direction of the downlink channel. Therefore, the method not only can send the aperiodic reference signal when the uplink control channel comprises HARQ-NACK, but also can rapidly determine the spatial beam direction of the aperiodic reference signal based on the spatial beam direction of the downlink channel. Therefore, the method is beneficial to improving the speed and the accuracy of the network equipment for obtaining the uplink channel state information, and further improving the scheduling accuracy.

In addition, the terminal device may also transmit a periodic reference signal, e.g., a periodic SRS, to the network device. The spatial beam direction of the periodic reference signal may be determined based on spatial correlation information (spatial correlation Info) configured or indicated for the terminal device by a higher layer. Specifically, if the spatial relationship Info of the periodic reference Signal contains a Synchronization Signal Block (SSB) index, the spatial beam direction of the periodic reference Signal is determined based on the spatial transmission filter of the terminal device receiving the SSB; if the spatial relationship Info of the periodic reference signal contains the CSI-RS index, the spatial beam direction of the periodic reference signal is determined based on a spatial transmission filter of the terminal equipment for receiving the CSI-RS; if the spatial relationship Info of the periodic reference signal contains the SRS index, the spatial beam direction of the periodic reference signal is determined based on the spatial transmission filter of the terminal device receiving the SRS.

Referring to fig. 4, fig. 4 is a schematic structural diagram of an aperiodic reference signal transmission device according to an embodiment of the present application. The aperiodic reference signal transmission apparatus 400 includes: a receiving unit 401 and a transmitting unit 402.

A receiving unit 401, configured to receive an uplink control channel from a terminal device.

A sending unit 402, configured to send an aperiodic reference signal when the uplink control channel includes one or more hybrid automatic repeat request HARQ-negative acknowledgements NACK; the spatial beam direction of the aperiodic reference signal is determined based on the spatial beam direction of the downlink channel.

The relevant content of this embodiment can be referred to the relevant content of the above method embodiment. And will not be described in detail herein.

In another embodiment, in the aperiodic reference signal transmission apparatus 400 shown in fig. 4, the sending unit 402 is configured to send an uplink control channel to a network device.

A receiving unit 401, configured to receive an aperiodic reference signal from the network device when one or more hybrid automatic repeat request HARQ-negative acknowledgements, NACKs, are included in the uplink control channel; the spatial beam direction of the aperiodic reference signal is determined based on the spatial beam direction of the downlink channel.

The relevant contents of this embodiment can be referred to the relevant contents of the above method embodiments. And will not be described in detail herein.

Referring to fig. 5, fig. 5 is a schematic structural diagram of another aperiodic reference signal transmission device provided in the embodiment of the present application. The aperiodic reference signal transmission device 500 includes: a transmitting unit 501.

A sending unit 501, configured to send an uplink control channel to a network device; the base station is also used for sending an aperiodic reference signal when the uplink control channel contains one or more hybrid automatic repeat request HARQ-Negative Acknowledgement (NACK); the spatial beam direction of the aperiodic reference signal is determined based on the spatial beam direction of the downlink channel.

In an optional embodiment, the downlink channel is a PDSCH scheduled by the last downlink control information DCI; the last DCI is a DCI occupying a most late time domain resource among the plurality of DCIs associated with the plurality of HARQ-NACKs.

Referring to fig. 6, fig. 6 is a schematic structural diagram of another aperiodic reference signal transmission apparatus provided in the embodiment of the present application. The aperiodic reference signal transmission device 600 includes: a receiving unit 601.

A receiving unit 601, configured to receive an uplink control channel from a terminal device; further configured to receive an aperiodic reference signal from the terminal device when one or more hybrid automatic repeat request, HARQ, negative acknowledgements, NACKs, are included in the uplink control channel; the spatial beam direction of the aperiodic reference signal is determined based on the spatial beam direction of the downlink channel.

Referring to fig. 7, fig. 7 is a schematic structural diagram of a network device according to an embodiment of the present disclosure. The network device 700 includes: the processor 701, the memory 702, the processor 701 and the memory 702 are connected by one or more communication buses.

The Processor 701 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, discrete hardware component, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

The processor 701 is configured to support the network device to perform the corresponding functions of the network device in the method described in fig. 2. The memory 702 may include read-only memory and random access memory, and provides computer programs and data to the processor 701. A portion of memory 702 may also include non-volatile random access memory. When the processor 701 calls the computer program, it is configured to:

receiving an uplink control channel from terminal equipment; when the uplink control channel comprises one or more hybrid automatic repeat request HARQ-Negative Acknowledgement (NACK), sending an aperiodic reference signal; the spatial beam direction of the aperiodic reference signal is determined based on the spatial beam direction of the downlink channel.

In another embodiment, the processor 701 is configured to support the network device to perform the corresponding functions of the network device in the method described in fig. 3. The memory 702 may include read-only memory and random access memory, and provides computer programs and data to the processor 701. A portion of the memory 702 may also include non-volatile random access memory. When the processor 701 calls the computer program, it is configured to:

receiving an uplink control channel from terminal equipment; receiving an aperiodic reference signal from the terminal device when one or more hybrid automatic repeat request, HARQ, negative acknowledgements, NACKs, are included in the uplink control channel; the spatial beam direction of the aperiodic reference signal is determined based on the spatial beam direction of the downlink channel.

Please refer to fig. 8, fig. 8 is a schematic structural diagram of a terminal device according to an embodiment of the present application. The terminal device 800 includes: the processor 801, the memory 802, the processor 801 and the memory 802 are connected by one or more communication buses.

The Processor 801 may be a Central Processing Unit (CPU), and may be other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, discrete hardware component, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

The processor 801 is configured to support the terminal device to perform the corresponding functions of the terminal device in the method described in fig. 2. The memory 802, which may include both read-only memory and random-access memory, provides computer programs and data to the processor 801. A portion of the memory 802 may also include non-volatile random access memory. Wherein, the processor 801 is used for executing, when calling the computer program:

sending an uplink control channel to the network device; receiving an aperiodic reference signal from the network device when one or more hybrid automatic repeat request, HARQ, negative acknowledgements, NACKs, are included in the uplink control channel; the spatial beam direction of the aperiodic reference signal is determined based on the spatial beam direction of the downlink channel.

In another embodiment, the processor 801 is configured to support the terminal device to perform the corresponding functions of the terminal device in the method described in fig. 3. The memory 802, which may include both read-only memory and random-access memory, provides computer programs and data to the processor 801. A portion of the memory 802 may also include non-volatile random access memory. Wherein, the processor 801 is used for executing, when calling the computer program:

transmitting an uplink control channel to the network device; when the uplink control channel comprises one or more hybrid automatic repeat request HARQ-Negative Acknowledgement (NACK), sending an aperiodic reference signal; the spatial beam direction of the aperiodic reference signal is determined based on the spatial beam direction of the downlink channel.

Referring to fig. 9, fig. 9 is a schematic structural diagram of a chip according to an embodiment of the present disclosure. The chip 900 includes: a processor 901 and a data interface 902, and may also include a memory 903. The number of the processors 901 may be one or more, and the number of the data interfaces 902 may be more.

In one embodiment, for a case that the chip 900 is used to implement the function of the network device in the method illustrated in fig. 2 in this embodiment of the present application:

the data interface 902 is configured to receive an uplink control channel from a terminal device; the base station is also used for sending an aperiodic reference signal when the uplink control channel contains one or more hybrid automatic repeat request HARQ-Negative Acknowledgement (NACK); the spatial beam direction of the aperiodic reference signal is determined based on the spatial beam direction of the downlink channel.

In one embodiment, for a case that the chip 900 is used to implement the function of the terminal device in the method illustrated in fig. 2 in the embodiment of the present application:

the data interface 902 is configured to send an uplink control channel to a network device; receiving an aperiodic reference signal from the network device when one or more hybrid automatic repeat request, HARQ, negative acknowledgements, NACKs, are included in the uplink control channel; the spatial beam direction of the aperiodic reference signal is determined based on the spatial beam direction of the downlink channel.

In one embodiment, for a case that the chip 900 is used to implement the function of the terminal device in the method illustrated in fig. 3 in the embodiment of the present application:

the data interface 902 is configured to send an uplink control channel to a network device; when the uplink control channel comprises one or more hybrid automatic repeat request HARQ-Negative Acknowledgement (NACK), sending an aperiodic reference signal; the spatial beam direction of the aperiodic reference signal is determined based on the spatial beam direction of the downlink channel.

In one embodiment, for a case that the chip 900 is used to implement the function of the network device in the method illustrated in fig. 3 in this embodiment of the present application:

the data interface 902 is configured to receive an uplink control channel from a terminal device; receiving an aperiodic reference signal from the terminal device when one or more hybrid automatic repeat request, HARQ, negative acknowledgements, NACKs, are included in the uplink control channel; the spatial beam direction of the aperiodic reference signal is determined based on the spatial beam direction of the downlink channel.

Other implementations of the chip can be found in the related contents of the above method embodiments. And will not be described in detail herein.

The embodiments of the present application and the embodiments of the method described above are based on the same concept, and the technical effects brought by the embodiments are also the same, and for the specific principle, reference is made to the description of the embodiments of the method described above, which is not repeated herein.

The embodiment of the present application further provides a chip module, the chip module includes the above chip, and is configured to execute: receiving an uplink control channel from terminal equipment; the base station is further configured to send an aperiodic reference signal when the uplink control channel contains one or more hybrid automatic repeat request, HARQ, negative acknowledgements, NACKs; the spatial beam direction of the aperiodic reference signal is determined based on the spatial beam direction of the downlink channel.

In another embodiment, the chip module is configured to perform: sending an uplink control channel to the network device; receiving an aperiodic reference signal from the network device when one or more hybrid automatic repeat request, HARQ, negative acknowledgement, NACK, are included in the uplink control channel; the spatial beam direction of the aperiodic reference signal is determined based on the spatial beam direction of the downlink channel.

In another embodiment, the chip module is configured to perform: sending an uplink control channel to the network device; when the uplink control channel comprises one or more hybrid automatic repeat request HARQ-Negative Acknowledgement (NACK), sending an aperiodic reference signal; the spatial beam direction of the aperiodic reference signal is determined based on the spatial beam direction of the downlink channel.

In another embodiment, the chip module is configured to perform: receiving an uplink control channel from terminal equipment; receiving an aperiodic reference signal from the terminal device when one or more hybrid automatic repeat request, HARQ, negative acknowledgement, NACK, are included in the uplink control channel; the spatial beam direction of the aperiodic reference signal is determined based on the spatial beam direction of the downlink channel.

Other implementations of the chip module can be found in the related contents of the above method embodiments. And will not be described in detail herein.

The embodiments of the present application and the embodiments of the method described above are based on the same concept, and the technical effects brought by the embodiments are also the same.

The embodiment of the application also provides a computer readable storage medium. The computer readable storage medium stores a computer program, which includes program instructions, and when the program instructions are executed by a processor, the non-periodic reference signal transmission method shown in fig. 2 or fig. 3 and the steps performed by the related embodiments may be performed.

The computer-readable storage medium may be an internal storage unit of the terminal device according to any of the foregoing embodiments, for example, a hard disk or a memory of the device. The computer-readable storage medium may also be an external storage device of the terminal device, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like provided on the device. Further, the computer-readable storage medium may also include both an internal storage unit and an external storage device of the terminal device. The computer-readable storage medium is used for storing the computer program and other programs and data required by the terminal device. The computer readable storage medium may also be used to temporarily store data that has been output or is to be output.

It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above may be implemented by a computer program, which may be stored in a computer readable storage medium and executed by a computer to implement the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.

While the foregoing is directed to embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.

Claims

1. An aperiodic reference signal transmission method, comprising:

the network equipment receives an uplink control channel from the terminal equipment;

the network equipment sends an aperiodic reference signal when the uplink control channel comprises one or more hybrid automatic repeat request HARQ-Negative Acknowledgement (NACK);

2. An aperiodic reference signal transmission method, comprising:

the terminal equipment sends an uplink control channel to the network equipment;

3. The method of claim 1 or 2, wherein the one or more HARQ-NACKs are sent by the terminal device in case of errors in decoding of one or more Physical Downlink Shared Channels (PDSCHs) sent by the network device.

4. The method of claim 3,

and the time domain resource of the downlink channel is overlapped with the time domain resource of the aperiodic reference signal.

5. The method of claim 3,

the downlink channel is a PDSCH corresponding to the HARQ-NACK.

6. The method of claim 3,

the downlink channel is a PDSCH scheduled by the last downlink control information DCI;

the last DCI is a DCI occupying a most late time domain resource among the plurality of DCIs associated with the plurality of HARQ-NACKs.

7. The method of claim 6, wherein the last DCI is a DCI that occupies a rearmost time domain resource among DCIs for scheduling PDSCHs corresponding to the plurality of HARQ-NACKs, respectively.

8. The method of claim 6,

and aiming at each cell with HARQ-NACK feedback, the last DCI is the DCI occupying the latest time domain resource in the DCI corresponding to one or more HARQ-NACKs belonging to the cell in the plurality of HARQ-NACKs.

9. The method of claim 3,

the downlink channel is a PDSCH with the minimum PDSCH configuration index;

the PDSCH with the smallest PDSCH configuration index is the PDSCH with the smallest PDSCH configuration index in the PDSCHs associated with the HARQ-NACKs.

10. The method of claim 9,

and the PDSCH with the minimum PDSCH configuration index is the PDSCH with the minimum PDSCH configuration index in the PDSCHs respectively corresponding to the HARQ-NACKs.

11. The method of claim 9,

for each cell with HARQ-NACK feedback, the PDSCH with the smallest PDSCH configuration index is one or more HARQ-NACKs belonging to the cell in the plurality of HARQ-NACKs, and the PDSCH with the smallest PDSCH configuration index in the corresponding PDSCH.

12. An aperiodic reference signal transmission method, comprising:

13. An aperiodic reference signal transmission method, comprising:

14. The method of claim 12 or 13, wherein the one or more HARQ-NACKs are sent by the terminal device in response to an error in decoding one or more physical downlink shared channel, PDSCH, sent by the network device.

15. The method of claim 14,

the downlink channel is a PDSCH corresponding to the HARQ-NACK.

16. The method of claim 14,

the last DCI is a DCI occupying a time domain resource most backward among a plurality of DCIs associated with the plurality of HARQ-NACKs.

17. The method of claim 16, wherein the last DCI is a DCI that occupies a rearmost time domain resource in the DCI scheduling the PDSCH corresponding to each of the plurality of HARQ-NACKs.

18. The method of claim 16,

19. The method of claim 14,

the downlink channel is a PDSCH with the minimum PDSCH configuration index;

the PDSCH with the smallest PDSCH configuration index is the PDSCH with the smallest PDSCH configuration index in the plurality of PDSCHs associated with the plurality of HARQ-NACKs.

20. The method of claim 19,

21. The method of claim 19,

for each cell with HARQ-NACK feedback, the PDSCH with the smallest PDSCH configuration index is one or more HARQ-NACKs belonging to the cell in the plurality of HARQ-NACKs, and the PDSCH with the smallest configuration index in the corresponding PDSCH.

22. An aperiodic reference signal transmission apparatus, comprising:

23. An aperiodic reference signal transmission apparatus, comprising:

24. An aperiodic reference signal transmission apparatus, comprising:

25. An aperiodic reference signal transmission apparatus, comprising:

26. A network device, characterized in that the network device comprises a processor and a memory, the processor and the memory being interconnected, wherein the memory is configured to store a computer program comprising program instructions, the processor being configured to invoke the program instructions, to perform the method of any one of claims 1, or 3 to 11, or to perform the method of any one of claims 13 to 21.

27. A terminal device, characterized in that the terminal device comprises a processor and a memory, the processor and the memory being interconnected, wherein the memory is configured to store a computer program comprising program instructions, the processor being configured to invoke the program instructions, to perform the method according to any one of claims 2 to 11, or to perform the method according to any one of claims 12, or 14 to 21.

28. A chip comprising a processor and a data interface, the processor reading instructions stored on a memory through the data interface to perform the method of any of claims 1, or 3 to 11, or to perform the method of any of claims 2 to 11, or to perform the method of any of claims 12, or 14 to 21, or to perform the method of any of claims 13 to 21.

29. A chip module, characterized in that it comprises a chip according to claim 28.

30. A computer-readable storage medium, characterized in that it stores a computer program comprising program instructions which, when executed by a processor, cause the processor to perform the method of any one of claims 1, or 3 to 11, or to perform the method of any one of claims 2 to 11, or to perform the method of any one of claims 12, or 14 to 21, or to perform the method of any one of claims 13 to 21.