WO2024031547A1

WO2024031547A1 - Non-periodic reference signal receiving and sending methods and apparatus

Info

Publication number: WO2024031547A1
Application number: PCT/CN2022/111822
Authority: WO
Inventors: 赵帝; 张健; 张磊
Original assignee: 富士通株式会社; 赵帝; 张健; 张磊
Priority date: 2022-08-11
Filing date: 2022-08-11
Publication date: 2024-02-15

Abstract

Embodiments of the present application provide non-periodic reference signal receiving and sending methods and an apparatus. The non-periodic reference signal receiving method comprises: a terminal device receiving first DCI, the first DCI comprising a TCI field, the TCI field indicating at least two TCI states, and the at least two TCI states comprising a first TCI state and a second TCI state; the terminal device receiving second DCI, the second DCI comprising a reference signal request field, and the reference signal request field being used to trigger a non-periodic reference signal; and the terminal device receiving the non-periodic reference signal, a QCL reference used to receive the non-periodic reference signal being related to the at least two TCI states. According to an embodiment of the present application, reliability of downlink receiving of a non-periodic reference signal and uplink sending of the non-periodic reference signal by the terminal device is ensured.

Description

Method and device for receiving and transmitting aperiodic reference signals

Technical field

The embodiments of this application relate to the field of communication technology.

Background technique

In the standardization process of version 17 (release-17, Rel-17), the 3GPP standardization organization carried out standardization related work on the unified transmission configuration indication (TCI). Among them, unified TCI in Rel-17 is mainly designed for sTRP (single transmission and reception point) scenarios.

With the advancement of standardization work, multiple TRP (mTRP, multiple transmission and reception point) has become an important scenario for 5G NR systems. Through mTRP-based transmission, the purpose of improving throughput and/or improving reliability can be achieved.

In previous standardization work, in Rel-16, the transmission of the mTRP-based Physical Downlink Shared Channel (PDSCH) was standardized; in Rel-17, the mTRP-based physical downlink control channel (PDSCH) was standardized Physical Downlink Control Channel, PDCCH), Physical Uplink Shared Channel (Physical Uplink Shared Channel, PUSCH), and Physical Uplink Control Channel (Physical Uplink Control Channel, PUCCH) transmission are standardized. Among them, mTRP transmission includes mTRP transmission based on single DCI (single Downlink Control Information, sDCI) and mTRP transmission based on multiple DCI (multiple DCI, mDCI). For mTRP transmission based on sDCI, one DCI schedules the uplink and downlink transmission of two TRPs, which is more suitable for situations where the backhaul between TRPs is ideal. For mTRP transmission based on mDCI, two TRPs use two DCIs to schedule the uplink and downlink transmission of their respective TRPs respectively, which is more suitable for situations where the backhaul between TRPs is not ideal.

It should be noted that the above introduction to the technical background is only to facilitate a clear and complete description of the technical solutions of the present application and to facilitate the understanding of those skilled in the art. It cannot be explained simply because these solutions are described in the background technology section of the present application. Based on the description, it is believed that the above technical solutions are well known to those skilled in the art.

Contents of the invention

The inventor found that for Rel-18 mTRP, in the current 3GPP standard, it is not determined how to map the DCI indicated downlink TCI state (indicated TCI state) to aperiodic CSI-RS transmission. In addition, it is not determined how to map the DCI indicated downlink TCI state to aperiodic CSI-RS transmission. The uplink TCI state (indicated TCI state) is mapped to aperiodic SRS transmission, which will cause the transmission of aperiodic CSI-RS and aperiodic SRS to be ambiguous which TCI state is used as the QCL reference, reducing the reliability of communication.

To address at least one of the above problems, embodiments of the present application provide a method and device for receiving and transmitting aperiodic reference signals to improve the reliability of terminal equipment in receiving aperiodic reference signals in downlink and transmitting aperiodic reference signals in uplink.

According to one aspect of the embodiment of the present application, a device for receiving aperiodic reference signals is provided, configured in a terminal equipment, and the device includes:

A first receiving unit that receives a first DCI, the first DCI includes a TCI field, the TCI field indicates at least two TCI states, the at least two TCI states include a first TCI state and a second TCI state;

a second receiving unit that receives a second DCI, where the second DCI includes a reference signal request field, and the reference signal request field is used to trigger the aperiodic reference signal;

The third receiving unit receives the aperiodic reference signal, and the QCL reference used to receive the aperiodic reference signal is related to the at least two TCI states.

According to another aspect of the embodiment of the present application, a device for sending aperiodic reference signals is provided, configured in network equipment, and the device includes:

A first sending unit that sends a first DCI, the first DCI including a TCI field indicating at least two TCI states; the at least two TCI states include a first TCI state and a second TCI state;

a second sending unit that sends a second DCI, where the second DCI includes a reference signal request field, and the reference signal request field is used to trigger the aperiodic reference signal;

A third sending unit is configured to send the aperiodic reference signal, and the QCL reference used to send the aperiodic reference signal is related to the at least two TCI states.

According to another aspect of the embodiment of the present application, a device for sending aperiodic reference signals is provided, configured in a terminal equipment, and the device includes:

A sending unit is configured to send the aperiodic reference signal, and the QCL reference used to send the aperiodic reference signal is related to the at least two TCI states.

According to another aspect of the embodiment of the present application, a device for receiving aperiodic reference signals is provided, configured in network equipment, and the device includes:

A receiving unit that receives the aperiodic reference signal, and a QCL reference used to receive the aperiodic reference signal is related to the at least two TCI states.

One of the beneficial effects of the embodiments of the present application is that according to the embodiments of the present application, on the one hand, it is possible to avoid ambiguity in how the terminal equipment selects a quasi-co-located reference for receiving aperiodic reference signals; How to select a quasi-co-located reference for periodic reference signals creates ambiguity, thereby ensuring the reliability of terminal equipment receiving aperiodic reference signals in the downlink and transmitting aperiodic reference signals in the uplink by explicitly selecting the TCI state.

With reference to the following description and drawings, specific embodiments of the present application are disclosed in detail, and the manner in which the principles of the present application may be adopted is indicated. It should be understood that embodiments of the present application are not thereby limited in scope. Embodiments of the present application include numerous alterations, modifications and equivalents within the spirit and scope of the appended claims.

Features described and/or illustrated with respect to one embodiment may be used in the same or similar manner in one or more other embodiments, in combination with features in other embodiments, or in place of features in other embodiments .

It should be emphasized that the term "comprising" when used herein refers to the presence of features, integers, steps or components but does not exclude the presence or addition of one or more other features, integers, steps or components.

Description of drawings

Elements and features described in one figure or one implementation of embodiments of the present application may be combined with elements and features illustrated in one or more other figures or implementations. Furthermore, in the drawings, like reference numerals represent corresponding parts throughout the several figures and may be used to indicate corresponding parts used in more than one embodiment.

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

Figure 2 is a schematic diagram of Indicated TCI state configuration that requires clear mapping for aperiodic CSI-RS;

Figure 3 is a schematic diagram of Indicated TCI state configuration that requires clear mapping for aperiodic SRS;

Figure 4 is a schematic diagram of a method for receiving aperiodic reference signals according to an embodiment of the present application;

Figure 5 is a schematic diagram of a method for transmitting aperiodic reference signals according to an embodiment of the present application;

Figure 6 is a schematic diagram of a method for transmitting aperiodic reference signals according to an embodiment of the present application;

Figure 7 is a schematic diagram of a method for receiving aperiodic reference signals according to an embodiment of the present application;

Figure 8 is a schematic diagram of a receiving device for aperiodic reference signals according to an embodiment of the present application;

Figure 9 is a schematic diagram of a device for transmitting aperiodic reference signals according to an embodiment of the present application;

Figure 10 is a schematic diagram of a device for transmitting aperiodic reference signals according to an embodiment of the present application;

Figure 11 is a schematic diagram of a receiving device for aperiodic reference signals according to an embodiment of the present application;

Figure 12 is a schematic structural diagram of a terminal device according to an embodiment of the present application;

Figure 13 is a schematic diagram of the structure of a network device according to an embodiment of the present application.

Detailed ways

The foregoing and other features of the present application will become apparent from the following description, taken in conjunction with the accompanying drawings. In the description and drawings, specific embodiments of the present application are specifically disclosed, indicating some of the embodiments in which the principles of the present application may be employed. It is to be understood that the present application is not limited to the described embodiments, but rather, the present application is This application includes all modifications, variations, and equivalents falling within the scope of the appended claims.

In the embodiments of this application, the terms "first", "second", etc. are used to distinguish different elements from the title, but do not indicate the spatial arrangement or temporal order of these elements, and these elements should not be used by these terms. restricted. The term "and/or" includes any and all combinations of one or more of the associated listed terms. The terms "comprises," "includes," "having" and the like refer to the presence of stated features, elements, elements or components but do not exclude the presence or addition of one or more other features, elements, elements or components.

In the embodiments of this application, the singular forms "a", "the", etc. include plural forms and should be broadly understood as "a" or "a type" and not limited to the meaning of "one"; in addition, the term "the" "" shall be understood to include both the singular and the plural unless the context clearly indicates otherwise. Furthermore, the term "based on" shall be understood to mean "based at least in part on," and the term "based on" shall be understood to mean "based at least in part on," unless the context clearly indicates otherwise.

In the embodiments of this application, the term "communication network" or "wireless communication network" may refer to a network that complies with any of the following communication standards, such as Long Term Evolution (LTE, Long Term Evolution), Long Term Evolution Enhanced (LTE-A, LTE- Advanced), Wideband Code Division Multiple Access (WCDMA, Wideband Code Division Multiple Access), High-speed Packet Access (HSPA, High-Speed Packet Access), 5G (5Generation) New Wireless (NR, New Radio), etc.

Moreover, the communication between devices in the communication system can be carried out according to the communication protocol at any stage. For example, it can include but is not limited to the following communication protocols: 1G, 2G, 2.5G, 2.75G, 3G, 4G, 4.5G and 5G new wireless, etc. etc., and/or other communication protocols currently known or to be developed in the future.

In the embodiment of this application, the term "network device" refers to a device in a communication system that connects a terminal device to a communication network and provides services to the terminal device. Network equipment may include but is not limited to the following equipment: base station (BS, Base Station), access point (AP, Access Point), transmission and reception point (TRP, Transmission Reception Point), broadcast transmitter, mobile management entity (MME, Mobile Management Entity), gateway, server, wireless network controller (RNC, Radio Network Controller), base station controller (BSC, Base Station Controller), etc.

Among them, the base station may include but is not limited to: Node B (NodeB or NB), evolved Node B (eNodeB or eNB) and 5G base station (gNB), etc. In addition, it may also include remote radio head (RRH, Remote Radio Head) , Remote Radio Unit (RRU, Remote Radio Unit), relay or low-power node (such as femeto, pico, etc.). And the term "base station" may include some or all of their functions, each of which may provide communications coverage to a specific geographic area. The term "cell" may refer to a base station and/or its coverage area, depending on the context in which the term is used.

In the embodiment of this application, the term "user equipment" (UE, User Equipment) or "terminal equipment" (TE, Terminal Equipment or Terminal Device) refers to a device that accesses a communication network through a network device and receives network services. Terminal equipment can be fixed or mobile, and can also be called mobile station (MS, Mobile Station), terminal, subscriber station (SS, Subscriber Station), access terminal (AT, Access Terminal), station, etc.

Among them, the terminal equipment may include but is not limited to the following equipment: cellular phone (Cellular Phone), personal digital assistant (PDA, Personal Digital Assistant), wireless modem, wireless communication equipment, handheld device, machine-type communication equipment, laptop computer, Cordless phones, smartphones, smart watches, digital cameras, and more.

For another example, in scenarios such as the Internet of Things (IoT), the terminal device can also be a machine or device for monitoring or measuring. For example, it can include but is not limited to: Machine Type Communication (MTC) terminals, Vehicle communication terminals, device-to-device (D2D, Device to Device) terminals, machine-to-machine (M2M, Machine to Machine) terminals, etc.

In addition, the term "network side" or "network device side" refers to one side of the network, which may be a certain base station or may include one or more network devices as above. The term "user side" or "terminal side" or "terminal device side" refers to the side of the user or terminal, which may be a certain UE or may include one or more terminal devices as above. Unless otherwise specified in this article, "device" can refer to network equipment or terminal equipment.

The following describes the scenarios of the embodiments of the present application through examples, but the present application is not limited thereto.

Figure 1 is a schematic diagram of a communication system according to an embodiment of the present application, schematically illustrating the case of terminal equipment and network equipment as examples. As shown in Figure 1, the communication system 100 may include a first TRP 101, a second TRP 102 and a terminal. Device 103. Among them, the first TRP 101 and the second TRP 102 can be network devices. For simplicity, Figure 1 only takes two TRPs (network devices) and one terminal device as an example for illustration, but the embodiment of the present application is not limited thereto.

In the embodiment of this application, existing services or services that can be implemented in the future can be transmitted between the first TRP 101, the second TRP 102 and the terminal device 103. For example, these services may include but are not limited to: enhanced mobile broadband (eMBB, enhanced Mobile Broadband), massive machine type communication (mMTC, massive Machine Type Communication) and high-reliability and low-latency communication (URLLC, Ultra-Reliable and Low -Latency Communication), etc.

In Rel-17, for unified TCI, in the sTRP scenario, the network device uses RRC signaling to configure M (M ≥ 1) TCI states (TCI states) for the terminal device, and uses the MAC CE (Media Access Control Control Unit) ) activates N (1 ≤ N ≤ M) TCI states among M TCI states, and uses DCI (downlink control information) to indicate L (1 ≤ L ≤ N) TCI states among N TCI states. For example, the TCI field of DCI format 1_1 or DCI format 1_2 indicates one or more TCI states. DCI format 1_1 or DCI format 1_2 can schedule downlink data, which is called DCI format 1_1/1_2 with DL assignment, or it can not schedule downlink data, which is called DCI format 1_1/1_2 without DL assignment.

Among them, a TCI state (TCI for short) can include or correspond to one or two source reference signals (source RS, source Reference Signal). The source reference signal can provide quasi co-location (QCL, Quasi Co-Location) information for downlink reception, which is called the downlink source reference signal. The source reference signal can provide a reference for the uplink transmission spatial filter (UL TX spatial filter, uplink transmission spatial filter) and is called the uplink source reference signal.

Additionally, the source reference signal can provide beam information for the destination channel/signal. For example, the beam used by the terminal device to receive the destination channel/signal is the same as the beam used to receive the downlink source reference signal. For another example, the beam used by the terminal equipment to transmit the destination channel/signal is the same as the beam used to transmit the uplink source reference signal. For another example, the beam used by the terminal equipment to transmit the destination channel/signal and the beam used to receive the downlink source reference signal have reciprocity, that is, the beams are the same but in opposite directions. Therefore, the indication or update of the TCI status actually includes the indication or update of the beam used by the terminal device.

In addition, the TCI state includes joint TCI state (joint DL/UL TCI state), downlink TCI state (DL only TCI state) and uplink TCI state (UL only TCI state). The source reference signal included in the downlink TCI state is the downlink source reference signal, the source reference signal included in the uplink TCI state is the uplink source reference signal, and the source reference signal included in the joint TCI state is both the downlink source reference signal and the uplink source reference signal.

The joint TCI state affects both the downlink beam (receive beam) and the uplink beam (transmit beam). In other words, the downlink beam and the uplink beam use the same beam, but the beam directions are opposite, that is, there is reciprocity between the uplink and downlink beams. The downlink TCI status only affects the downlink beam. The uplink TCI status only affects the uplink beam. The uplink beam is also called the uplink transmit spatial filter.

The TCI field may indicate the joint TCI state (joint DL/UL TCI state), or the TCI field may indicate the independent TCI state (separate DL/UL TCI state), that is, indicating the downlink TCI state and/or the uplink TCI state, indicating the joint TCI state or Indicating independent TCI status can be configured through RRC signaling. For Rel-17 unified TCI, a TCI field indicates a combined TCI status (equivalent to indicating both the downlink TCI status and the uplink TCI status), or indicates a downlink TCI status, or indicates an uplink TCI status, or indicates One downstream TCI state and one upstream TCI state.

Figure 1 gives a schematic illustration of mTRP-based PDSCH reception. The terminal equipment 103 receives two PDSCHs from the first TRP 101 and the second TRP 102, which may be in the form of space division, time division or frequency division. The terminal equipment 103 receives two PDSCHs according to the QCL information provided by TCI state 1 and TCI state 2 respectively.

In Rel-17, unified TCI was introduced. The downlink or combined TCI state can provide QCL information for at least UE-specific PDSCH reception and UE-specific PDCCH reception; the uplink or combined TCI state can at least provide UE-specific PUSCH transmission or UE-specific The PUCCH is sent to provide QCL information.

In addition, the TCI status configured by Rel-17 for downlink reception and the TCI status configured for uplink transmission can be activated in the MAC CE. Up to 8 groups of TCI status can be activated, each group has 1 or 2 TCI status. For each group with 1 TCI status, one of the downlink TCI status, uplink TCI status, or combined TCI status will be specified; for each group with 2 TCI status, one is the downlink TCI status, and the other is Uplink TCI status.

The inventors note that in Rel-17, unified TCI only applies to sTRP scenarios. Considering the importance of mTRP, it is necessary to design a corresponding unified TCI mechanism for mTRP scenarios. 3GPP will standardize the unified TCI of mTRP in Rel-18. At present, mTRP's unified TCI has been identified as one of the project contents of Rel-18, and the standardization work of Rel-18 has just begun.

CSI-RS (Channel State Information Reference Signal) is a type of downlink reference signal. Its uses include: used as a tracking reference signal (TRS, Tracking RS), used for beam management (BM, Beam Management), and used for channel status Information (CSI, Channel State Information) is obtained and used for mobility management (Mobility), etc. According to different time domain behaviors, CSI-RS can be divided into periodic CSI-RS (periodic CSI-RS), semi-persistent CSI-RS (semi-persistent CSI-RS), aperiodic CSI-RS (aperiodic CSI-RS). RS). Among them, aperiodic CSI-RS requires the CSI request (CSI request) field of DCI format 0_1 or DCI format 0_2 to be triggered and then start transmission.

SRS (Sounding Reference Signal) is a type of uplink reference signal. According to different time domain behaviors, SRS can be divided into periodic SRS (periodic CSI-RS), semi-persistent SRS (semi-persistent SRS), and aperiodic SRS ( aperiodic SRS). Among them, aperiodic SRS requires the SRS request (SRS request) field of DCI format 1_1 or DCI format 1_2 or DCI format 0_1 or DCI format 0_2 to be triggered and then start transmission.

Under the unified TCI framework of Rel-17, for the downlink situation, aperiodic CSI-RS used to obtain channel state information and aperiodic CSI-RS used for BM (beam management) (collectively referred to as aperiodic CSI-RS) can Share the TCI state used to schedule downlink reception. The downlink reception here may be the downlink data channel PDSCH or the downlink control channel PDCCH, but is not limited thereto. That is to say, the joint TCI state or downlink TCI state in a set of TCI states indicated by the TCI field of DCI format 0_1 or DCI format 0_2 can be used for PDSCH, PDCCH, and aperiodic CSI-RS.

Similarly, under the unified TCI framework of Rel-17, for uplink situations, aperiodic SRS signals can share the TCI state used to schedule uplink transmission. The uplink transmission here may be the uplink data channel PUSCH or the uplink control channel PUCCH, but is not limited thereto. That is to say, the joint TCI state or the uplink TCI state in a group of TCI indicated by the TCI field of DCI format 1_1 or DCI format 1_2 or DCI format 0_1 or DCI format 0_2 can be used by PUSCH, can be used by PUCCH, can be used by PUSCH. Non-periodic SRS is used.

The inventor found that functionally, the unified TCI of mTRP needs to be able to indicate the TCI status of two TRPs as well as the TCI status of one TRP. In the case of mTRP, a set of TCI states activated on the MAC-CE can provide QCL information for downlink reception and/or uplink transmission for multiple TRPs (2 TRPs in Rel-18).

However, if DCI format 1_1 or DCI format 1_2 has indicated 2 downstream TCI states, or has indicated 2 joint TCI states, or has indicated 1 joint TCI state and 1 downstream TCI state, then for DCI format 0_1 Or an aperiodic CSI-RS triggered by the CSI request field of DCI format 0_2. There is currently no mechanism to determine which joint TCI state or downlink TCI state should be used as the QCL reference for the currently triggered aperiodic CSI-RS. That is, there is no determination of how to use The downlink indicated TCI state indicated by DCI is mapped to aperiodic CSI-RS.

Figure 2 is a schematic diagram of Indicated TCI state configuration that requires a clear mapping method for aperiodic CSI-RS.

As shown in Figure 2, under mTRP transmission, if the TCI state indicated by the TCI field in DCI format 0_1 or DCI format 0_2 belongs to the following situations, it is necessary to clarify how the Indicated TCI state is mapped to aperiodic CSI-RS:

2 joint TCI states (that is, joint TCI 1 and joint TCI 2, column 1 in Figure 2), which TCI state should be used as the QCL reference for the currently triggered aperiodic CSI-RS;

2 downlink TCI states (i.e. DL TCI 1 and DL TCI 2, column 2 in Figure 2), which TCI state should be used as the QCL reference for the currently triggered aperiodic CSI-RS;

1 joint TCI state and 1 downlink TCI state (i.e. joint TCI 3+DL TCI 3, column 3 in Figure 2; DL TCI 4+joint TCI 4, column 4 in Figure 2), the currently triggered non- Which TCI state should be used as QCL reference for periodic CSI-RS.

On the other hand, if DCI format 1_1 or DCI format 2_2 has indicated 2 upstream TCI states, or has indicated 2 joint TCI states, or has indicated 1 joint TCI state and 1 upstream TCI state, then for DCI An aperiodic SRS triggered by the SRS request field of format 1_1 or DCI format 1_2 or DCI format 0_1 or DCI format 0_2. Currently, there is no mechanism to determine which joint TCI state or uplink TCI state should be used as the QCL reference for the currently triggered aperiodic SRS. , that is, it is not determined how to map the upstream indicated TCI state indicated by DCI to aperiodic SRS.

Figure 3 is a schematic diagram of Indicated TCI state configuration that requires clear mapping for aperiodic SRS.

As shown in Figure 3, under mTRP transmission, if the TCI state indicated by the TCI field in DCI format 1_1 or DCI format 1_0 or DCI format 0_1 or DCI format 0_2 belongs to the following situations, it is necessary to clarify how the Indicated TCI state is mapped to non- Cycle SRS:

2 joint TCI states (that is, joint TCI 1 and joint TCI 2, column 1 in Figure 3), which TCI state should be used as the QCL reference for the currently triggered aperiodic SRS;

2 uplink TCI states (i.e. UL TCI 1 and UL TCI 2, column 2 in Figure 3), which TCI state should be used as the QCL reference for the currently triggered aperiodic SRS;

1 joint TCI state and 1 uplink TCI state (i.e. joint TCI 3+UL TCI 3, column 3 in Figure 3; UL TCI 4+joint TCI 4, column 4 in Figure 3), the currently triggered non- Which TCI state should be used as QCL reference for periodic SRS.

To address at least one of the above problems, embodiments of the present application provide a method and device for receiving and transmitting aperiodic reference signals. The embodiments of the present application will be described below in conjunction with the drawings and specific implementation modes.

In the following description, "TCI status for uplink transmission (UL TX)" and "TCI status for uplink transmission spatial filter (UL TX spatial filter)" are equivalent and can be replaced with each other; "Reference signal request field "Used to trigger the aperiodic reference signal", at this time, the aperiodic reference signal is not actually transmitted.

Embodiments of the first aspect

The embodiment of the present application provides a method for receiving aperiodic reference signals, which is applied on the terminal equipment side.

Figure 4 is a schematic diagram of a method for receiving aperiodic reference signals according to an embodiment of the present application. As shown in Figure 4, the method includes:

401. The terminal device receives the first DCI. The first DCI includes a TCI field. The TCI field indicates at least two TCI states. The at least two TCI states include a first TCI state and a second TCI state;

402. The terminal device receives the second DCI, the second DCI includes a reference signal request field, and the reference signal request field is used to trigger aperiodic reference signals;

403. The terminal device receives the aperiodic reference signal, and the QCL reference used to receive the aperiodic reference signal is related to the at least two TCI states.

It is worth noting that the above Figure 4 only schematically illustrates the embodiment of the present application, taking a terminal device as an example, but the present application is not limited thereto. For example, the execution order between various operations can be appropriately adjusted, and some other operations can be added or some operations reduced. In addition, the objects of the above operations can also be adjusted. Those skilled in the art can make appropriate modifications based on the above content, and are not limited to the description in Figure 4 above.

According to the embodiments of the present application, it is possible to avoid ambiguity in how the terminal equipment selects a quasi-co-located reference for receiving aperiodic reference signals, thereby ensuring the reliability of the terminal equipment's downlink reception of aperiodic reference signals by explicitly selecting the TCI state.

In this embodiment of the present application, the first DCI may be DCI format 1_1 or DCI format 1_2, and the first DCI may include a TCI field used to indicate the TCI status. The second DCI may be DCI format 0_1 or DCI format 0_2. The second DCI may include a field used to trigger the aperiodic reference signal, which is called a reference signal request field. The application is not limited to this. The first DCI and the second DCI may also be in other formats, when the first DCI indicates at least two TCI states, and the second DCI contains a reference signal request field for triggering aperiodic reference signals. , the terminal equipment receives the aperiodic reference signal with a QCL reference related to the above-mentioned at least two TCI states.

In this embodiment of the present application, the aperiodic reference signal may be aperiodic CSI-RS. For the transmission of aperiodic CSI-RS, the above reference signal request field is called "CSI request field". The application is not limited to this, and the aperiodic reference signal may also be other downlink reference signals. In the following description, the aperiodic reference signal is aperiodic CSI-RS as an example.

In this embodiment of the present application, for the unified TCI of mTRP, the TCI field of the first DCI may indicate at least one of the following situations:

1) A joint TCI state;

2) Two joint TCI states (corresponding to the first TCI state and the second TCI state respectively);

3) Two downlink TCI states (corresponding to the first TCI state and the second TCI state respectively) and two uplink TCI states;

4) One downlink TCI state and one uplink TCI state;

5) Two downlink TCI states (corresponding to the first TCI state and the second TCI state respectively) and one uplink TCI state;

6) Two uplink TCI states (corresponding to the first TCI state and the second TCI state respectively) and one downlink TCI state;

7) Two downlink TCI states (corresponding to the first TCI state and the second TCI state respectively);

8) Two uplink TCI states (corresponding to the first TCI state and the second TCI state respectively);

9) A downlink TCI status;

10) An uplink TCI status;

11) A joint TCI state and a downlink TCI state (corresponding to the first TCI state and the second TCI state respectively);

12) A downlink TCI state and a combined TCI state (corresponding to the first TCI state and the second TCI state respectively);

13) A joint TCI state and an uplink TCI state (corresponding to the first TCI state and the second TCI state respectively);

14) An uplink TCI state and a combined TCI state (corresponding to the first TCI state and the second TCI state respectively).

In some embodiments, the at least two TCI states include one of the above situations 2), 3), 5), 7), 11), and 12). That is, if the indication of the TCI field of the first DCI is one of the above situations 2), 3), 5), 7), 11), and 12), and the second DCI contains a non-periodic reference signal for triggering Reference signal request field, the terminal device uses the QCL reference related to the above-mentioned at least two TCI states to receive the aperiodic reference signal. The application is not limited to this, and the at least two TCI states mentioned above may also include other situations or other combinations of the above situations.

In the above embodiment, the first downlink is sent by the first TRP. It can also be said that the first downlink corresponds to the first TRP, such as the first TRP 101 in the example shown in Figure 1, and the second downlink is sent by the second TRP. TRP is issued, it can also be said that the second downlink corresponds to the second TRP, such as the second TRP 102 in the example shown in Figure 1. The application is not limited to this. The first downlink and the second downlink may also have other expressions, as long as they are respectively associated with the first TRP and the second TRP.

In some embodiments, the QCL reference used to receive the aperiodic reference signal is predefined as the aforementioned first TCI state or as the aforementioned second TCI state. That is, the terminal device uses a predefined TCI state (first TCI state or second TCI state) as a QCL reference to receive the aperiodic reference signal.

For example, if the indication of the TCI field of the first DCI is one of the above situations 2), 3), 5), 7), 11), and 12), and the second DCI contains " CSI request field", the terminal device always selects the first TCI state as the QCL reference of the aperiodic CSI-RS to receive the aperiodic CSI-RS. That is, for the above situation 2), the terminal equipment always selects the first joint TCI state; for the above situation 3), the terminal equipment always selects the first downlink TCI state; for the above situation 5), the terminal equipment always selects the first joint TCI state. 1 downlink TCI state; for the above situation 7), the terminal equipment always selects the first downlink TCI state; for the above situation 11), the terminal equipment always selects the joint TCI state; for the above situation 12), the terminal equipment always selects the joint TCI state Downlink TCI status.

Or, if the indication of the TCI field of the first DCI is one of the above situations 2), 3), 5), 7), 11), and 12), and the second DCI contains " CSI request field", the terminal device always selects the second TCI state as the QCL reference of the aperiodic CSI-RS to receive the aperiodic CSI-RS. That is, for the above situation 2), the terminal equipment always selects the second joint TCI state; for the above situation 3), the terminal equipment always selects the second downlink TCI state; for the above situation 5), the terminal equipment always selects the second downlink TCI state. 2 downlink TCI states; for the above situation 7), the terminal equipment always selects the second downlink TCI state; for the above situation 11), the terminal equipment always selects the downlink TCI state; for the above situation 12), the terminal equipment always selects Joint TCI status.

In other embodiments, the QCL reference used to receive the aperiodic reference signal is a TCI state different from the TCI state used to receive the aperiodic reference signal last time. That is, the terminal device uses the same TCI state as the one used to receive the aperiodic reference signal last time. Different TCI states are used as QCL references to receive aperiodic reference signals. For example, if the TCI state used to receive the aperiodic reference signal last time is the first TCI state, the terminal device uses the second TCI state as the QCL reference to receive the aperiodic reference signal; if the TCI state used to receive the aperiodic reference signal last time is When the TCI state is the second TCI state, the terminal device uses the first TCI state as the QCL reference to receive the aperiodic reference signal.

Still using the above example, if the indication of the TCI field of the first DCI is one of the above situations 2), 3), 5), 7), 11), and 12), and the second DCI contains triggered aperiodic CSI -RS "CSI request field", then the terminal device alternately selects the first TCI state and the second TCI state as the QCL reference of the aperiodic CSI-RS to receive the aperiodic CSI-RS.

In the above embodiment, the terminal device may also receive first indication information, which instructs the terminal device to use the default TCI state as the QCL reference to receive the aperiodic reference signal when the aperiodic reference signal is triggered for the first time. signal; the above-mentioned default TCI state is the aforementioned first TCI state or the aforementioned second TCI state.

This application does not limit the implementation method of the first indication information. For example, the first indication information can be a reset command, called "reset TCI for CSI reset command". When the terminal device receives the reset command, , when aperiodic CSI-RS is triggered for the first time, the first TCI state is selected as the QCL reference by default to receive aperiodic CSI-RS, and the current selection situation is recorded on the terminal device side; in the second aperiodic CSI-RS When the RS is triggered, the second TCI state is selected as the QCL reference to receive the aperiodic CSI-RS; when the third aperiodic CSI-RS is triggered, the first TCI state is selected as the QCL reference to receive the aperiodic CSI-RS; When aperiodic CSI-RS is triggered four times, the second TCI state is selected as the QCL reference to receive aperiodic CSI-RS. For other aperiodic CSI-RS triggers, the selection is alternately selected.

In the above embodiment, the above reset command may be sent multiple times, and each time the terminal device receives the reset command, it uses the default TCI state as the QCL reference when the aperiodic CSI-RS is triggered for the first time. Receive aperiodic CSI-RS, and before receiving the next restart command, always alternately select the first TCI state and the second TCI state as the QCL reference to receive aperiodic CSI-RS.

In some embodiments, the second DCI further includes a first indication field, which is used to indicate the TCI state required to receive the aperiodic reference signal. The terminal equipment uses the TCI status indicated by the first indication field as a QCL reference to receive the aperiodic reference signal.

In the above embodiment, the TCI state indicated by the first indication field is the aforementioned first TCI state or the second TCI state. However, the present application is not limited thereto. The TCI status indicated by the first indication field may also be other TCI status among the aforementioned at least two TCIs.

In the above embodiment, the first indication field may be a newly added field in the second DCI, which may be called "mapping TCI to CSI", for example.

In some embodiments, the field length of the first indication field may be 1 bit, and is used to indicate which TCI state the terminal device selects as the QCL reference of the aperiodic reference signal.

For example, when the value of the first indication field is 0, the terminal device uses the first TCI state as the QCL reference to receive the aperiodic reference signal; when the value of the first indication field is 1, the terminal device uses the second TCI state as the QCL reference. Receive aperiodic reference signals.

For another example, when the value of the first indication field is 0, the terminal device uses the second TCI state as the QCL reference to receive the aperiodic reference signal; when the value of the first indication field is 1, the terminal device uses the first TCI state as the QCL reference. Reference receives aperiodic reference signals.

Taking the first indication field as "mapping TCI to CSI" as an example, the following table shows the value and corresponding meaning of the "mapping TCI to CSI" field.

取值value	含义meaning
00	选择第一下行对应的用于下行接收的TCI状态Select the TCI status corresponding to the first downlink for downlink reception.
11	选择第二下行对应的用于下行接收的TCI状态Select the TCI status corresponding to the second downlink for downlink reception.

That is, when the value of the "mapping TCI to CSI" field is 0, the terminal device is instructed to select the TCI state corresponding to the first downlink (corresponding to the first TRP) for downlink reception, that is, the first TCI state; when When the value of the "mapping TCI to CSI" field is 1, the terminal device is instructed to select the TCI state corresponding to the second downlink (corresponding to the second TRP) for downlink reception, that is, the second TCI state.

The above are just examples, and this application does not limit this, and the corresponding meanings of the above values can also be interchanged. For example, when the value of the "mapping TCI to CSI" field is 0, the terminal device is instructed to select the TCI state for downlink reception corresponding to the second downlink (corresponding to the second TRP), that is, the second TCI state; when the " When the value of the "mapping TCI to CSI" field is 1, the terminal device is instructed to select the TCI state corresponding to the first downlink (corresponding to the first TRP) for downlink reception, that is, the first TCI state.

In the above embodiment, taking the addition of the "mapping TCI to CSI" field in the second DCI in the case of mTRP as an example, the application is not limited to this. In the case of non-mTRP, such as the case of sTRP, it can also be added in the second DCI. A new "mapping TCI to CSI" field is added to the second DCI. The value of this field is fixed to a certain fixed value, such as 0. Therefore, the terminal device always selects the user corresponding to a certain downlink (corresponding to a certain TRP). The TCI state received in the downlink is used as a QCL reference to receive aperiodic reference signals.

The above embodiments only illustrate the embodiments of the present application, but the present application is not limited thereto, and appropriate modifications can be made based on the above embodiments. For example, each of the above embodiments can be used alone, or one or more of the above embodiments can be combined.

As can be seen from the above embodiments, when the first DCI indicates at least two TCI states, and the second DCI contains a reference signal request field for triggering aperiodic reference signals, the terminal equipment uses the information related to the at least two TCI states. The QCL reference receives the aperiodic reference signal, which can avoid the ambiguity of the terminal equipment in how to select the quasi-co-located reference to receive the aperiodic reference signal, thereby ensuring the reliability of the terminal equipment's downlink reception of the aperiodic reference signal by explicitly selecting the TCI state.

Embodiments of the second aspect

The embodiment of the present application provides a method for transmitting aperiodic reference signals, which is applied to the network device side and is a process on the network device side corresponding to the method of the embodiment of the first aspect, wherein the content is the same as that of the embodiment of the first aspect. No longer.

Figure 5 is a schematic diagram of a method for transmitting aperiodic reference signals according to an embodiment of the present application. As shown in Figure 5, the method includes:

501. The network device sends the first DCI. The first DCI includes a TCI field. The TCI field indicates at least two TCI states. The at least two TCI states include a first TCI state and a second TCI state;

502. The network device sends a second DCI, the second DCI includes a reference signal request field, and the reference signal request field is used to trigger aperiodic reference signals;

503. The network device sends the aperiodic reference signal, and the QCL reference used to send the aperiodic reference signal is related to the at least two TCI states.

It is worth noting that the above Figure 5 only schematically illustrates the embodiment of the present application, but the present application is not limited thereto. For example, the execution order between various operations can be appropriately adjusted, and some other operations can also be added or some of them reduced. Those skilled in the art can make appropriate modifications based on the above content, and are not limited to the above description in FIG. 5 .

According to the embodiments of the present application, it is possible to avoid ambiguity in how network equipment selects a quasi-co-located reference for transmitting aperiodic reference signals, thereby ensuring the reliability of terminal equipment in downlink reception of aperiodic reference signals by explicitly selecting the TCI state.

In some embodiments, the above-mentioned at least two TCI states include one of the following:

Two joint TCI states respectively correspond to the first TCI state and the second TCI state;

Two downlink TCI states and two uplink TCI states, the two downlink TCI states respectively correspond to the first TCI state and the second TCI state;

Two downlink TCI states and one uplink TCI state, the two downlink TCI states respectively correspond to the first TCI state and the second TCI state;

Two downlink TCI states respectively correspond to the first TCI state and the second TCI state;

A joint TCI state and a downlink TCI state respectively correspond to the first TCI state and the second TCI state;

A downlink TCI state and a joint TCI state respectively correspond to the first TCI state and the second TCI state.

In some embodiments, the QCL reference used for transmitting the aperiodic reference signal is predefined as the aforementioned first TCI state or as the aforementioned second TCI state. That is, the network device always uses the first TCI state as the QCL reference or always uses the second TCI state as the QCL reference to transmit the aperiodic reference signal.

In some embodiments, the QCL reference used to transmit the aperiodic reference signal is a different TCI state than the TCI state used for the last time the aperiodic reference signal was transmitted. That is, the network device alternately uses different TCI states as QCL references to send aperiodic reference signals. For example, if the TCI state used to send the aperiodic reference signal last time was the first TCI state, the network device uses the second TCI state as the QCL reference to send the aperiodic reference signal; if the TCI state used to send the aperiodic reference signal last time was When the TCI state is the second TCI state, the network device uses the first TCI state as the QCL reference to send the aperiodic reference signal.

In the above embodiment, the network device may also send first indication information, through which the terminal device is instructed to use the default TCI state as the QCL reference to receive the aperiodic reference when the aperiodic reference signal is triggered for the first time. signal; the default TCI state may be the aforementioned first TCI state or the aforementioned second TCI state.

In the above embodiment, the aperiodic reference signal is triggered for the first time after receiving the first indication information. For example, the first indication information may be a reset command, which may be called "reset TCI for CSI". "Command, after each time the terminal device receives the reset command, when the aperiodic reference signal is triggered for the first time, the default TCI state is used as the QCL reference to receive the aperiodic reference signal. After that, it is used alternately and is different from the last time. The TCI status serves as the QCL reference to receive the aperiodic reference signal until the next reset command is received.

In some embodiments, the second DCI further includes a first indication field that indicates a TCI state required to receive the aperiodic reference signal. Therefore, the terminal device can use the TCI status indicated by the first indication field as a QCL reference to receive the aperiodic reference signal.

In the above embodiment, the TCI state indicated by the first indication field may be the aforementioned first TCI state, the aforementioned second TCI state, or other TCI states among the aforementioned at least two TCI states. This application provides There is no restriction on this.

In the above embodiment, the field width of the first indication field may be 1 bit.

In some implementations, when the value of the first indication field is 0, the network device uses the first TCI state as the QCL reference to send the aperiodic reference signal; when the value of the first indication field is 1, the network device uses the second TCI Status sends aperiodic reference signal as QCL reference.

In other embodiments, when the value of the first indication field is 0, the network device uses the second TCI state as the QCL reference to send the aperiodic reference signal; when the value of the first indication field is 1, the network device uses the first TCI status sends aperiodic reference signal as QCL reference.

In the embodiment of this application, the first DCI may be DCI format 1_1 or DCI format 1_2; the second DCI may be DCI format 0_1 or DCI format 0_2; the reference signal request field may be CSI request; the aperiodic reference signal may be aperiodic CSI-RS. This application is not limited to this. The first DCI and the second DCI can also be in other formats, the aperiodic reference signal can be other downlink reference signals, and the corresponding reference signal request field can also have other names.

As can be seen from the above embodiments, when the first DCI indicates at least two TCI states, and the second DCI contains a reference signal request field for triggering aperiodic reference signals, the network device uses the first TCI state or the second TCI Sending the aperiodic reference signal in the state as a QCL reference can avoid ambiguity in network equipment about how to select a quasi-co-located reference for sending aperiodic reference signals, thereby ensuring the reliability of terminal equipment's downlink reception of aperiodic reference signals by explicitly selecting the TCI state.

Embodiments of the third aspect

The embodiment of the present application provides a method for sending aperiodic reference signals, which is applied on the terminal equipment side.

Figure 6 is a schematic diagram of a method for transmitting aperiodic reference signals according to an embodiment of the present application. As shown in Figure 6, the method includes:

601. The terminal device receives the first DCI. The first DCI includes a TCI field. The TCI field indicates at least two TCI states. The at least two TCI states include a first TCI state and a second TCI state;

602. The terminal device receives the second DCI, the second DCI includes a reference signal request field, and the reference signal request field is used to trigger aperiodic reference signals;

603. The terminal device sends the aperiodic reference signal, and the QCL reference used to send the aperiodic reference signal is related to the at least two TCI states.

It is worth noting that the above Figure 6 only schematically illustrates the embodiment of the present application, taking a terminal device as an example, but the present application is not limited thereto. For example, the execution order between various operations can be appropriately adjusted, and some other operations can be added or some operations reduced. In addition, the objects of the above operations can also be adjusted. Those skilled in the art can make appropriate modifications based on the above content, and are not limited to the above description in FIG. 6 .

According to the embodiments of the present application, it is possible to avoid ambiguity in how the terminal equipment selects a quasi-co-located reference for transmitting aperiodic reference signals, thereby ensuring the reliability of the terminal equipment for uplink transmission of aperiodic reference signals by explicitly selecting the TCI state.

In this embodiment of the present application, the first DCI may be DCI format 1_1 or DCI format 1_2, and the first DCI may include a TCI field used to indicate the TCI status. The second DCI may be DCI format 1_1 or DCI format 1_2 or DCI format 0_1 or DCI format 0_2. The second DCI may include a field for triggering the aperiodic reference signal, which is called a reference signal request field. The application is not limited to this. The first DCI and the second DCI may also be in other formats, when the first DCI indicates at least two TCI states, and the second DCI contains a reference signal request field for triggering aperiodic reference signals. , the terminal equipment sends the aperiodic reference signal with a QCL reference related to the above-mentioned at least two TCI states.

In this embodiment of the present application, the aperiodic reference signal may be aperiodic SRS. For the transmission of aperiodic SRS, the above reference signal request field is called "SRS request field". The application is not limited to this, and the aperiodic reference signal may also be other uplink reference signals. In the following description, the aperiodic reference signal is an aperiodic SRS as an example.

1) A joint TCI state;

3) Two downlink TCI states and two uplink TCI states (corresponding to the first TCI state and the second TCI state respectively);

4) One downlink TCI state and one uplink TCI state;

9) A downlink TCI status;

10) An uplink TCI status;

In some embodiments, the at least two TCI states include one of the above situations 2), 3), 6), 8), 13), and 14). That is, if the indication of the TCI field of the first DCI is one of the above situations 2), 3), 6), 8), 13), and 14), and the second DCI contains a non-periodic reference signal for triggering Reference signal request field, the terminal device uses the QCL reference related to the above-mentioned at least two TCI states to send the aperiodic reference signal. The application is not limited to this, and the at least two TCI states mentioned above may also include other situations or other combinations of the above situations.

In the above embodiment, the first uplink is received by the first TRP, that is, the first uplink may correspond to the first TRP, such as the first TRP 101 in the example shown in Figure 1, and the second uplink is received by the second TRP. , that is, the second uplink may correspond to the second TRP, such as the second TRP 102 in the example shown in Figure 1 . The application is not limited to this. The first uplink and the second uplink can also be expressed in other ways, as long as they correspond to the first TRP and the second TRP respectively.

In some embodiments, the QCL reference used for transmitting the aperiodic reference signal is predefined as the aforementioned first TCI state or as the aforementioned second TCI state. That is, the terminal device uses the predefined TCI state (the first TCI state or the second TCI state) as the QCL reference to send the aperiodic reference signal.

For example, if the indication of the TCI field of the first DCI is one of the above situations 2), 3), 6), 8), 13), and 14), and the second DCI contains an "SRS request" that triggers aperiodic SRS field", the terminal device always selects the first TCI state as the QCL reference of the aperiodic SRS to send the aperiodic SRS. That is, for the above situation 2), the terminal device always selects the first joint TCI state; for the above situation 3), the terminal device always selects the first uplink TCI state; for the above situation 6), the terminal device always selects the first joint TCI state. 1 uplink TCI state; for the above situation 8), the terminal equipment always selects the first uplink TCI state; for the above situation 13), the terminal equipment always selects the joint TCI state; for the above situation 14), the terminal equipment always selects Uplink TCI status.

Or, if the indication of the TCI field of the first DCI is one of the above situations 2), 3), 6), 8), 13), 14), and the second DCI contains an "SRS request" that triggers aperiodic SRS field", the terminal device always selects the second TCI state as the QCL reference of the aperiodic SRS to send the aperiodic SRS. That is, for the above situation 2), the terminal device always selects the second joint TCI state; for the above situation 3), the terminal device always selects the second uplink TCI state; for the above situation 6), the terminal device always selects the second joint TCI state. 2 uplink TCI states; for the above situation 8), the terminal device always selects the second uplink TCI state; for the above situation 13), the terminal device always selects the uplink TCI state; for the above situation 14), the terminal device always selects Joint TCI status.

In other embodiments, the QCL reference used to transmit the aperiodic reference signal is a TCI state different from the TCI state used to transmit the aperiodic reference signal last time. That is, the terminal device uses the same TCI state as the one used to transmit the aperiodic reference signal last time. Different TCI states are used as QCL references to transmit aperiodic reference signals. For example, if the TCI state used to send the aperiodic reference signal last time is the first TCI state, the terminal device uses the second TCI state as the QCL reference to send the aperiodic reference signal; if the TCI state used to send the aperiodic reference signal last time is When the TCI state is the second TCI state, the terminal device uses the first TCI state as the QCL reference to send the aperiodic reference signal.

Still using the above example, if the indication of the TCI field of the first DCI is one of the above situations 2), 3), 6), 8), 13), and 14), and the second DCI contains triggering aperiodic SRS "SRS request field", the terminal device alternately selects the first TCI state and the second TCI state as the QCL reference of the aperiodic SRS to send the aperiodic SRS.

In the above embodiment, the terminal device may also receive second indication information, which instructs the terminal device to use the default TCI state as the QCL reference to send the aperiodic reference signal when the aperiodic reference signal is triggered for the first time. signal; the above-mentioned default TCI state is the aforementioned first TCI state or the aforementioned second TCI state.

This application does not limit the implementation method of the second indication information. For example, the second indication information can be a reset command, called "reset TCI for SRS reset command". When the terminal device receives the reset command , when aperiodic SRS is triggered for the first time, the first TCI state is selected as the QCL reference to send aperiodic SRS by default, and the current selection situation is recorded on the terminal device side; when aperiodic SRS is triggered for the second time, the first TCI state is selected as the QCL reference. The second TCI state is used as the QCL reference to send aperiodic SRS; when the third aperiodic SRS is triggered, the first TCI state is selected as the QCL reference to send the aperiodic SRS; when the fourth aperiodic SRS is triggered, the second TCI is selected The status is used as a QCL reference to send aperiodic SRS, and for other times of aperiodic SRS triggering, the selection is alternated.

In the above embodiment, the above reset command may be sent multiple times. Each time the terminal device receives the reset command, it uses the default TCI state as the QCL reference to send the non-periodic SRS when the aperiodic SRS is triggered for the first time. Periodic SRS, and before receiving the next restart command, always alternately select the first TCI state and the second TCI state as the QCL reference to send aperiodic SRS.

In other embodiments, the second DCI further includes a second indication field, which is used to indicate the TCI state required to receive the aperiodic reference signal. The terminal equipment uses the TCI status indicated by the second indication field as a QCL reference to send aperiodic reference signals.

In the above embodiment, the TCI state indicated by the second indication field is the aforementioned first TCI state or the second TCI state. However, the present application is not limited thereto. The TCI status indicated by the second indication field may also be other TCI status among the aforementioned at least two TCIs.

In the above embodiment, the second indication field may be a newly added field in the second DCI, which may be called "mapping TCI to SRS", for example.

In some embodiments, the field length of the second indication field may be 1 bit, and is used to indicate which TCI state the terminal device selects as the QCL reference of the aperiodic reference signal.

For example, when the value of the second indication field is 0, the terminal device uses the first TCI state as the QCL reference to send the aperiodic reference signal; when the value of the second indication field is 1, the terminal device uses the second TCI state as the QCL reference. Send aperiodic reference signals.

For another example, when the value of the second indication field is 0, the terminal device uses the second TCI state as the QCL reference to send the aperiodic reference signal; when the value of the second indication field is 1, the terminal device uses the first TCI state as the QCL Reference transmits aperiodic reference signals.

Taking the second indication field as "mapping TCI to SRS" as an example, the following table shows the value and corresponding meaning of the "mapping TCI to SRS" field.

取值value	含义meaning
00	选择第一上行对应的用于上行发送的TCI状态Select the TCI status corresponding to the first uplink for uplink transmission.
11	选择第二上行对应的用于上行发送的TCI状态Select the TCI status corresponding to the second uplink for uplink transmission.

That is, when the value of the "mapping TCI to SRS" field is 0, the terminal device is instructed to select the TCI state corresponding to the first uplink (corresponding to the first TRP) for uplink transmission, that is, the first TCI state; when the When the value of the "mapping TCI to SRS" field is 1, the terminal device is instructed to select the TCI state corresponding to the second uplink (corresponding to the second TRP) for uplink transmission, that is, the second TCI state.

The above are just examples, and this application does not limit this, and the corresponding meanings of the above values can also be interchanged. For example, when the value of the "mapping TCI to SRS" field is 0, the terminal device is instructed to select the TCI state corresponding to the second uplink (corresponding to the second TRP) for uplink transmission, that is, the second TCI state; when the " When the value of the "mapping TCI to SRS" field is 1, the terminal device is instructed to select the TCI state corresponding to the first uplink (corresponding to the first TRP) for uplink transmission, that is, the first TCI state.

In the above embodiment, taking the addition of the "mapping TCI to SRS" field in the second DCI in the case of mTRP as an example, the application is not limited to this. In the case of non-mTRP, such as the case of sTRP, it can also be added in the second DCI. The "mapping TCI to SRS" field is added to the second DCI. The value of this field is fixed to a certain fixed value, such as 0. Therefore, the terminal device always selects the user corresponding to a certain uplink (corresponding to a certain TRP). The TCI status sent in the uplink is used as a QCL reference to send aperiodic reference signals.

In some embodiments, the reference signal request field of the second DCI also indicates a Sounding Reference Signal (SRS) resource set, and the terminal device uses the TCI state associated with the SRS resource set as a QCL reference to send aperiodic reference signals.

In the above embodiment, the terminal device can determine the TCI state associated with the SRS resource set indicated by the second DCI according to the association between the SRS resource set and the TCI state.

This application does not limit the implementation method of this association relationship. For example, the association relationship may be predefined, or preconfigured (semi-static), or configured by the network device (dynamic). Moreover, the association relationship can be stored on the UE side and/or the network side, or the association relationship can be written in a standard document, etc.

In some implementations, each SRS resource set available for mTRP transmission is fixedly associated with one of the TCI states in advance, that is, associated with one of the first TCI state and the second TCI state. For example, the SRS resource set that can be used for mTRP transmission may be configured as p, p∈2, 3, 4 (the SRS request field is 2 bits wide, so up to 1 can be selected from 4 SRS resource sets), respectively represented as SRS -ResourceSet 1～SRS-ResourceSet p. The following table is an example of the relationship between SRS-ResourceSet and TCI status. Each column on the right represents a set of relationships.

The above table only lists some of the correlations between SRS-ResourceSet and TCI status. The remaining correlations that are not listed are also applicable to this application.

In the above embodiment, in the case of aperiodic SRS triggering, the terminal device can select the corresponding SRS resource set according to the value of the SRS request field, and select the first TCI state or select the second TCI according to the predetermined association relationship. Status as QCL reference to send aperiodic SRS.

As can be seen from the above embodiments, when the first DCI indicates at least two TCI states, and the second DCI contains a reference signal request field for triggering aperiodic reference signals, the terminal equipment uses the information related to the at least two TCI states. Using the QCL reference to send the aperiodic reference signal can avoid ambiguity in how the terminal equipment selects a quasi-co-located reference for sending the aperiodic reference signal, thereby ensuring the reliability of the terminal equipment's uplink transmission of the aperiodic reference signal by explicitly selecting the TCI state.

Embodiments of the fourth aspect

The embodiment of the present application provides a method for receiving aperiodic reference signals, which is applied to the network device side and is a processing on the network device side corresponding to the method of the embodiment of the third aspect, wherein the content is the same as that of the embodiment of the third aspect. No longer.

Figure 7 is a schematic diagram of a method for receiving aperiodic reference signals according to an embodiment of the present application. As shown in Figure 7, the method includes:

701. The network device sends the first DCI, where the first DCI includes a TCI field, and the TCI field indicates at least two TCI states; the at least two TCI states include a first TCI state and a second TCI state;

702. The network device sends a second DCI, where the second DCI includes a reference signal request field, and the reference signal request field is used to trigger aperiodic reference signals;

703. The network device receives the aperiodic reference signal, and the QCL reference used to receive the aperiodic reference signal is related to the at least two TCI states.

It is worth noting that the above Figure 7 only schematically illustrates the embodiment of the present application, but the present application is not limited thereto. For example, the execution order between various operations can be appropriately adjusted, and some other operations can also be added or some of them reduced. Those skilled in the art can make appropriate modifications based on the above content, and are not limited to the above description in FIG. 7 .

According to the embodiments of the present application, it is possible to avoid ambiguity in how network equipment selects a quasi-co-located reference for receiving aperiodic reference signals, thereby ensuring the reliability of terminal equipment for uplink transmission of aperiodic reference signals by explicitly selecting the TCI state.

Two uplink TCI states and two downlink TCI states, the two uplink TCI states respectively correspond to the first TCI state and the second TCI state;

Two uplink TCI states and one downlink TCI state, the two uplink TCI states respectively correspond to the first TCI state and the second TCI state;

Two uplink TCI states respectively correspond to the first TCI state and the second TCI state;

A joint TCI state and an uplink TCI state respectively correspond to the first TCI state and the second TCI state;

An uplink TCI state and a combined TCI state respectively correspond to the first TCI state and the second TCI state.

In some embodiments, the QCL reference for receiving the aperiodic reference signal is predefined as the aforementioned first TCI state or as the aforementioned second TCI state. That is, the network device always uses the first TCI state as the QCL reference or always uses the second TCI state as the QCL reference to receive the aperiodic reference signal.

In some embodiments, the QCL reference used to receive the aperiodic reference signal is a different TCI state than the TCI state used when the aperiodic reference signal was last received. That is, the network device alternately uses different TCI states as QCL references to receive aperiodic reference signals. For example, if the TCI state used to receive the aperiodic reference signal last time was the first TCI state, the network device uses the second TCI state as the QCL reference to receive the aperiodic reference signal; if the TCI state used to receive the aperiodic reference signal last time was When the TCI state is the second TCI state, the network device uses the first TCI state as the QCL reference to receive the aperiodic reference signal.

In the above embodiment, the network device may also send second indication information, through which the terminal device is instructed to use the default TCI state as the QCL reference to send the aperiodic reference when the aperiodic reference signal is triggered for the first time. signal; the default TCI state may be the aforementioned first TCI state or the aforementioned second TCI state.

In the above embodiment, the aperiodic reference signal is triggered for the first time when the second indication information is received. For example, the second indication information may be a reset command, which may be called "reset TCI for SRS". "Command, after each time the terminal device receives the reset command, when the aperiodic reference signal is triggered for the first time, the default TCI state is used as the QCL reference to send the aperiodic reference signal. After that, it is used alternately and is different from the last time. The TCI status is used as a QCL reference to send aperiodic reference signals until the next reset command is received.

In some embodiments, the second DCI further includes a second indication field that indicates a TCI state required for transmitting the aperiodic reference signal. Therefore, the terminal device can use the TCI status indicated by the second indication field as a QCL reference to send aperiodic reference signals.

In the above embodiment, the TCI state indicated by the second indication field may be the aforementioned first TCI state, the aforementioned second TCI state, or other TCI states among the aforementioned at least two TCI states. This application provides There is no restriction on this.

In the above embodiment, the field width of the second indication field may be 1 bit.

In some implementations, when the value of the second indication field is 0, the network device uses the first TCI state as the QCL reference to receive the aperiodic reference signal; when the value of the second indication field is 1, the network device uses the second TCI Status receives aperiodic reference signal as QCL reference.

In other embodiments, when the value of the second indication field is 0, the network device uses the second TCI state as the QCL reference to receive the aperiodic reference signal; when the value of the second indication field is 1, the network device uses the first TCI state receives aperiodic reference signal as QCL reference.

In some embodiments, the reference signal request indication field of the second DCI also indicates a sounding reference signal (SRS) resource set; the network device uses the TCI state associated with the SRS resource set as a QCL reference to receive the aperiodic reference signal.

In the above embodiment, the network device determines the TCI state associated with the SRS resource set indicated by the second DCI according to the association relationship between the SRS resource set and the TCI state. This application does not limit the implementation method of this association relationship.

In the embodiment of this application, the first DCI can be DCI format 1_1 or DCI format 1_2; the second DCI can be DCI format 1_1 or DCI format 1_2 or DCI format 0_1 or DCI format 0_2; the reference signal request field can be SRS request; The aperiodic reference signal may be aperiodic SRS. The application is not limited to this. The first DCI and the second DCI can also be in other formats, the aperiodic reference signal can be other uplink reference signals, and the corresponding reference signal request field can also have other names.

As can be seen from the above embodiments, when the first DCI indicates at least two TCI states, and the second DCI contains a reference signal request field for triggering aperiodic reference signals, the network device uses the first TCI state or the second TCI Using the state as a QCL reference to receive the aperiodic reference signal can avoid ambiguity in how the network equipment selects a quasi-co-located reference for receiving the aperiodic reference signal, thereby ensuring the reliability of the terminal device's uplink transmission of the aperiodic reference signal by explicitly selecting the TCI state.

Embodiments of the fifth aspect

An embodiment of the present application provides a device for receiving aperiodic reference signals. The device may be, for example, a terminal device, or may be some or some components or components configured in the terminal device, and the same content as the embodiments of the first to second aspects will not be described again.

FIG. 8 is a schematic diagram of an aperiodic reference signal receiving device according to an embodiment of the present application. As shown in Figure 8, the aperiodic reference signal receiving device 800 in this embodiment of the present application includes:

The first receiving unit 801 receives the first DCI, the first DCI includes a TCI field, the TCI field indicates at least two TCI states, the at least two TCI states include a first TCI state and a second TCI state;

The second receiving unit 802 receives the second DCI, the second DCI includes a reference signal request field, the reference signal request field is used to trigger the aperiodic reference signal; and

The third receiving unit 803 receives the aperiodic reference signal, and the QCL reference used to receive the aperiodic reference signal is related to the at least two TCI states.

In some embodiments, the at least two TCI states include one of the following:

In some embodiments, the QCL reference for receiving the aperiodic reference signal is predefined as the first TCI state or as the second TCI state.

In some embodiments, the QCL reference used to receive the aperiodic reference signal is a TCI state different from the TCI state used to receive the aperiodic reference signal last time,

in,

When the TCI state used to receive the aperiodic reference signal last time was the first TCI state, the third receiving unit 803 uses the second TCI state as the QCL reference to receive the aperiodic reference signal;

When the TCI state used for receiving the aperiodic reference signal last time is the second TCI state, the third receiving unit 803 uses the first TCI state as the QCL reference to receive the aperiodic reference signal.

In some embodiments, as shown in Figure 8, the receiving device 800 further includes:

The fourth receiving unit 804 receives the first indication information, which instructs the terminal device to use the default TCI state as the QCL reference to receive the aperiodic reference signal when the aperiodic reference signal is triggered for the first time. Aperiodic reference signal; the default TCI state is the first TCI state or the second TCI state.

In some embodiments, the second DCI also includes a first indication field that indicates the TCI state required to receive the aperiodic reference signal; the third receiving unit 803 uses the first indication field. The TCI status indicated by the indication field is used as a QCL reference to receive the aperiodic reference signal.

In the above embodiments, in some implementations, the field width of the first indication field is 1 bit; when the value of the first indication field is 0, the third receiving unit 803 uses the first TCI state Receive an aperiodic reference signal as a QCL reference; when the value of the first indication field is 1, the third receiving unit 803 uses the second TCI state as a QCL reference to receive an aperiodic reference signal; or, when the value of the first indication field is 1, When the value of the first indication field is 0, the third receiving unit 803 uses the second TCI state as the QCL reference to receive the aperiodic reference signal; when the value of the first indication field is 1, the third receiving unit 803 uses The first TCI state receives an aperiodic reference signal as a QCL reference.

In this embodiment of the present application, the first DCI is DCI format 1_1 or DCI format 1_2; the second DCI is DCI format 0_1 or DCI format 0_2; the reference signal request field is CSI request; the aperiodic reference The signal is aperiodic CSI-RS.

An embodiment of the present application also provides a device for sending aperiodic reference signals. The device may be, for example, a network device, or may be some or some components or components configured on the network device. The same content as the embodiments of the first to second aspects will not be described again.

FIG. 9 is a schematic diagram of a device for transmitting aperiodic reference signals according to an embodiment of the present application. As shown in Figure 9, the aperiodic reference signal sending device 900 in this embodiment of the present application includes:

The first sending unit 901 sends a first DCI, the first DCI includes a TCI field, the TCI field indicates at least two TCI states, the at least two TCI states include a first TCI state and a second TCI state;

The second sending unit 902 sends a second DCI, the second DCI includes a reference signal request field, and the reference signal request field is used to trigger aperiodic reference signals;

The third sending unit 903 is configured to send the aperiodic reference signal, and the QCL reference used to send the aperiodic reference signal is related to the at least two TCI states.

In some embodiments, the at least two TCI states include one of the following:

A downlink TCI state and a combined TCI state respectively correspond to the first TCI state and the second TCI state.

In some embodiments, the QCL reference used for transmitting the aperiodic reference signal is predefined as the first TCI state or as the second TCI state.

In some embodiments, the QCL reference used to transmit the aperiodic reference signal is a TCI state different from the TCI state used to transmit the aperiodic reference signal last time,

in,

When the TCI state used to send the aperiodic reference signal last time was the first TCI state, the third sending unit 903 uses the second TCI state as the QCL reference to send the aperiodic reference signal;

When the TCI state used for transmitting the aperiodic reference signal last time was the second TCI state, the third sending unit 903 uses the first TCI state as the QCL reference to transmit the aperiodic reference signal.

In some embodiments, as shown in Figure 9, the sending device 900 further includes:

The fourth sending unit 904 sends first indication information, which instructs the terminal device to use the default TCI state as the QCL reference to receive the aperiodic reference signal when the aperiodic reference signal is triggered for the first time. Aperiodic reference signal; the default TCI state is the first TCI state or the second TCI state.

In some embodiments, the second DCI further includes a first indication field, the first indication field indicates the TCI state required to receive the aperiodic reference signal, so that the terminal device uses the first The TCI status indicated by the indication field is used as a QCL reference to receive the aperiodic reference signal.

In the above embodiments, in some implementations, the field width of the first indication field is 1 bit; when the value of the first indication field is 0, the third sending unit 903 uses the first TCI state Send the aperiodic reference signal as a QCL reference; when the value of the first indication field is 1, the third sending unit 903 uses the second TCI state as a QCL reference to send the aperiodic reference signal; or, when When the value of the first indication field is 0, the third sending unit 903 uses the second TCI state as a QCL reference to send the aperiodic reference signal; when the value of the first indication field is 1, the third sending unit 903 The sending unit 903 uses the first TCI state as a QCL reference to send the aperiodic reference signal.

An embodiment of the present application also provides a device for sending aperiodic reference signals. The device may be, for example, a terminal device, or may be some or some parts or components configured in the terminal device. The same content as the embodiments of the third to fourth aspects will not be described again.

FIG. 10 is a schematic diagram of a device for transmitting aperiodic reference signals according to an embodiment of the present application. As shown in Figure 10, the aperiodic reference signal sending device 1000 in the embodiment of the present application includes:

The first receiving unit 1001 receives the first DCI, the first DCI includes a TCI field, the TCI field indicates at least two TCI states, the at least two TCI states include a first TCI state and a second TCI state;

The second receiving unit 1002 receives the second DCI, the second DCI includes a reference signal request field, and the reference signal request field is used to trigger aperiodic reference signals;

The sending unit 1003 is configured to send the aperiodic reference signal, and the QCL reference used to send the aperiodic reference signal is related to the at least two TCI states.

In some embodiments, the at least two TCI states include one of the following:

An uplink TCI state and a joint TCI state respectively correspond to the first TCI state and the second TCI state.

in,

When the TCI state used to send the aperiodic reference signal last time was the first TCI state, the sending unit 1003 uses the second TCI state as the QCL reference to send the aperiodic reference signal;

When the TCI state used for transmitting the aperiodic reference signal last time was the second TCI state, the transmitting unit 1003 uses the first TCI state as the QCL reference to transmit the aperiodic reference signal.

In some embodiments, as shown in Figure 10, the sending device 1000 further includes:

The third receiving unit 1004 receives second indication information, which instructs the terminal device to use the default TCI state as the QCL reference to send the aperiodic reference signal when the aperiodic reference signal is triggered for the first time. Aperiodic reference signal; the default TCI state is the first TCI state or the second TCI state.

In some embodiments, the second DCI also includes a second indication field, the second indication field indicates the TCI state required to send the aperiodic reference signal; the sending unit 1003 uses the second indication field The indicated TCI status is transmitted as a QCL reference by the aperiodic reference signal.

In the above embodiments, in some implementations, the field width of the second indication field is 1 bit; when the value of the second indication field is 0, the sending unit 1003 uses the first TCI state as the QCL The aperiodic reference signal is sent with reference; when the value of the second indication field is 1, the sending unit 1003 uses the second TCI state as the QCL reference to send the aperiodic reference signal; or, when the value of the second indication field is When it is 0, the sending unit 1003 uses the second TCI state as the QCL reference to send the aperiodic reference signal; when the value of the second indication field is 1, the sending unit 1003 uses the first TCI state as the QCL reference to send Aperiodic reference signal.

In some embodiments, the reference signal request indication field of the second DCI also indicates a sounding reference signal (SRS) resource set; the sending unit 1003 uses the TCI status associated with the SRS resource set as a QCL reference to send the Described non-periodic reference signal.

In the above embodiment, the sending unit 1003 may determine the TCI state associated with the SRS resource set indicated by the second DCI according to the association relationship between the SRS resource set and the TCI state.

In this embodiment of the present application, the first DCI is DCI format 1_1 or DCI format 1_2; the second DCI is DCI format 1_1 or DCI format 1_2 or DCI format 0_1 or DCI format 0_2; the reference signal request field is SRS request; the aperiodic reference signal is aperiodic SRS.

An embodiment of the present application also provides a device for receiving aperiodic reference signals. The device may be, for example, a network device, or may be one or some components or components configured on the network device. The same content as the embodiments of the third to fourth aspects will not be described again.

FIG. 11 is a schematic diagram of an aperiodic reference signal receiving device according to an embodiment of the present application. As shown in Figure 11, the aperiodic reference signal receiving device 1100 in the embodiment of the present application includes:

The first sending unit 1101 sends the first DCI, the first DCI includes a TCI field, the TCI field indicates at least two TCI states; the at least two TCI states include a first TCI state and a second TCI state;

The second sending unit 1102 sends a second DCI, the second DCI includes a reference signal request field, and the reference signal request field is used to trigger aperiodic reference signals;

The receiving unit 1103 receives the aperiodic reference signal, and the QCL reference used to receive the aperiodic reference signal is related to the at least two TCI states.

In some embodiments, the at least two TCI states include one of the following:

In some embodiments, the QCL used to receive the aperiodic reference signal is a TCI state different from the TCI state used to receive the aperiodic reference signal last time,

in,

When the TCI state used to receive the aperiodic reference signal last time was the first TCI state, the receiving unit 1103 uses the second TCI state as the QCL reference to receive the aperiodic reference signal;

When the TCI state used to receive the aperiodic reference signal last time is the second TCI state, the receiving unit 1103 uses the first TCI state as a QCL reference to receive the aperiodic reference signal.

In some embodiments, as shown in Figure 11, the receiving device 1100 further includes:

The third sending unit 1104 sends second indication information. The second indication information instructs the terminal device to use the default TCI state as the QCL reference to send the aperiodic reference signal when the aperiodic reference signal is triggered for the first time. Aperiodic reference signal; the default TCI state is the first TCI state or the second TCI state.

In some embodiments, the second DCI further includes a second indication field, the second indication field indicates the TCI state required to send the aperiodic reference signal, so that the terminal device uses the second The TCI status indicated by the indication field is used as a QCL reference to send the aperiodic reference signal.

In the above embodiments, in some implementations, the field width of the second indication field is 1 bit; when the value of the second indication field is 0, the receiving unit 1103 uses the first TCI state as the QCL The aperiodic reference signal is received with reference; when the value of the second indication field is 1, the receiving unit 1103 uses the second TCI state as a QCL reference to receive the aperiodic reference signal; or, when the second indication field is When the value of the indication field is 0, the receiving unit 1103 uses the second TCI state as the QCL reference to receive the aperiodic reference signal; when the value of the second indication field is 1, the receiving unit 1103 uses the first The TCI state receives the aperiodic reference signal as a QCL reference.

In some embodiments, the reference signal request indication field of the second DCI also indicates a sounding reference signal (SRS) resource set; the receiving unit 1103 uses the TCI status associated with the SRS resource set as a QCL reference to receive all Described non-periodic reference signal.

In the above embodiment, the receiving unit 1103 may determine the TCI state associated with the SRS resource set indicated by the second DCI according to the association relationship between the SRS resource set and the TCI state.

It is worth noting that the above only describes each component or module related to the present application, but the present application is not limited thereto. The devices 800 to 1100 may also include other components or modules. For the specific contents of these components or modules, please refer to related technologies.

In addition, for the sake of simplicity, Figures 8 to 11 only illustrate the connection relationships or signal directions between various components or modules, but it should be clear to those skilled in the art that various related technologies such as bus connections can be used. . Each of the above components or modules can be implemented by hardware facilities such as a processor, a memory, a transmitter, a receiver, etc.; the implementation of this application is not limited to this.

It can be seen from the above embodiments that, on the one hand, it is possible to avoid ambiguity in how the terminal equipment selects a quasi-co-located reference for receiving aperiodic reference signals; on the other hand, it is possible to avoid ambiguity about how the terminal equipment selects a quasi-co-located reference for transmitting aperiodic reference signals. , thereby ensuring the reliability of the terminal equipment's downlink reception of aperiodic reference signals and uplink transmission of aperiodic reference signals by explicitly selecting the TCI state.

Embodiment of the sixth aspect

An embodiment of the present application also provides a communication system, which includes a network device and a terminal device. Reference may be made to FIG. 1 , and the same content as the embodiments of the first to fifth aspects will not be described again.

In some embodiments, the network device is configured to:

Send a first DCI, the first DCI includes a TCI field, the TCI field indicates at least two TCI states, the at least two TCI states include a first TCI state and a second TCI state;

Send a second DCI, the second DCI includes a reference signal request field, the reference signal request field is used to trigger the aperiodic reference signal;

Send the aperiodic reference signal, and the QCL reference used to send the aperiodic reference signal is related to the at least two TCI states;

In the above embodiment, the terminal device is configured as:

receiving the first DCI;

receiving the second DCI;

The aperiodic reference signal is received, and a QCL reference used to receive the aperiodic reference signal is related to the at least two TCI states.

In the above embodiments, the content regarding the network device and the terminal device has been described in detail in the embodiments of the first and second aspects, and the content thereof is incorporated here and will not be described again here.

In other embodiments, the network device is configured to:

Send a first DCI, the first DCI includes a TCI field, the TCI field indicates at least two TCI states; the at least two TCI states include a first TCI state and a second TCI state;

receiving the aperiodic reference signal, a QCL reference used to receive the aperiodic reference signal being related to the at least two TCI states;

In the above embodiment, the terminal device is configured as:

receiving the first DCI;

receiving said receiving second DCI;

The aperiodic reference signal is transmitted, and the QCL reference used to transmit the aperiodic reference signal is related to the at least two TCI states.

In the above embodiments, the content about the network device and the terminal device has been described in detail in the embodiments of the third and fourth aspects, and the content is incorporated here and will not be described again here.

The embodiment of the present application also provides a terminal device, but the present application is not limited to this and may also be other devices.

Figure 12 is a schematic diagram of a terminal device according to an embodiment of the present application. As shown in Figure 12, the terminal device 1200 may include a processor 1210 and a memory 1220; the memory 1220 stores data and programs and is coupled to the processor 1210. It is worth noting that this figure is exemplary; other types of structures may also be used to supplement or replace this structure to implement telecommunications functions or other functions.

For example, the processor 1210 may be configured to execute a program to implement the method described in the embodiments of the first aspect or the third aspect.

As shown in Figure 12, the terminal device 1200 may also include: a communication module 1230, an input unit 1240, a display 1250, and a power supply 1260. The functions of the above components are similar to those in the prior art and will not be described again here. It is worth noting that the terminal device 1200 does not necessarily include all components shown in Figure 122, and the above components are not required; in addition, the terminal device 1200 may also include components not shown in Figure 12, please refer to the current There is technology.

The embodiment of the present application also provides a network device, which may be a base station, for example, but the present application is not limited thereto and may also be other network devices.

Figure 13 is a schematic diagram of the structure of a network device according to an embodiment of the present application. As shown in FIG. 13 , the network device 1300 may include a processor 1310 (eg, a central processing unit CPU) and a memory 1320 ; the memory 1320 is coupled to the processor 1310 . The memory 1320 can store various data; in addition, it also stores an information processing program 1330, and the program 1330 is executed under the control of the processor 1310.

For example, the processor 1310 may be configured to execute a program to implement the method described in the embodiments of the second aspect or the fourth aspect.

In addition, as shown in Figure 13, the network device 1300 may also include: a transceiver 1340, an antenna 1350, etc.; the functions of the above components are similar to those of the existing technology and will not be described again here. It is worth noting that the network device 1300 does not necessarily include all components shown in Figure 13; in addition, the network device 1300 may also include components not shown in Figure 13, and reference may be made to the existing technology.

An embodiment of the present application also provides a computer program, wherein when the program is executed in a terminal device, the program causes the terminal device to execute the method described in the embodiment of the first aspect or the third aspect.

An embodiment of the present application also provides a storage medium storing a computer program, wherein the computer program causes the terminal device to execute the method described in the embodiment of the first aspect or the third aspect.

An embodiment of the present application also provides a computer program, wherein when the program is executed in a network device, the program causes the network device to execute the method described in the embodiment of the second aspect or the fourth aspect.

An embodiment of the present application also provides a storage medium storing a computer program, wherein the computer program causes a network device to perform the method described in the embodiment of the second aspect or the fourth aspect.

The above devices and methods of this application can be implemented by hardware, or can be implemented by hardware combined with software. The present application relates to a computer-readable program that, when executed by a logic component, enables the logic component to implement the apparatus or component described above, or enables the logic component to implement the various methods described above or steps. This application also involves storage media used to store the above programs, such as hard disks, magnetic disks, optical disks, DVDs, flash memories, etc.

The methods/devices described in connection with the embodiments of the present application may be directly embodied as hardware, a software module executed by a processor, or a combination of both. For example, one or more of the functional block diagrams and/or one or more combinations of the functional block diagrams shown in the figure may correspond to each software module of the computer program flow, or may correspond to each hardware module. These software modules can respectively correspond to the various steps shown in the figure. These hardware modules can be implemented by solidifying these software modules using a field programmable gate array (FPGA), for example.

The software module may be located in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the art. A storage medium may be coupled to the processor such that the processor can read information from the storage medium and write information to the storage medium; or the storage medium may be an integral part of the processor. The processor and storage media may be located in an ASIC. The software module can be stored in the memory of the mobile terminal or in a memory card that can be inserted into the mobile terminal. For example, if the device (such as a mobile terminal) uses a larger-capacity MEGA-SIM card or a large-capacity flash memory device, the software module can be stored in the MEGA-SIM card or the large-capacity flash memory device.

One or more of the functional blocks and/or one or more combinations of the functional blocks described in the accompanying drawings may be implemented as a general-purpose processor or a digital signal processor (DSP) for performing the functions described in this application. ), application specific integrated circuit (ASIC), field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, or any appropriate combination thereof. One or more of the functional blocks and/or one or more combinations of the functional blocks described in the accompanying drawings can also be implemented as a combination of computing devices, for example, a combination of a DSP and a microprocessor, or multiple microprocessors. processor, one or more microprocessors combined with DSP communications, or any other such configuration.

The present application has been described above in conjunction with specific embodiments, but it should be clear to those skilled in the art that these descriptions are exemplary and do not limit the scope of protection of the present application. Those skilled in the art can make various variations and modifications to this application based on the spirit and principles of this application, and these variations and modifications are also within the scope of this application.

Regarding implementations including the above embodiments, the following additional notes are also disclosed:

1. A method for receiving aperiodic reference signals, wherein the method includes:

The terminal device receives the first DCI, the first DCI includes a TCI field, the TCI field indicates at least two TCI states, the at least two TCI states include a first TCI state and a second TCI state;

The terminal device receives a second DCI, the second DCI includes a reference signal request field, and the reference signal request field is used to trigger an aperiodic reference signal;

The terminal equipment receives the aperiodic reference signal, and a QCL reference used to receive the aperiodic reference signal is related to the at least two TCI states.

2. The method according to appendix 1, wherein the at least two TCI states include one of the following:

3. The method described in Appendix 1 or 2, wherein,

The QCL reference used for receiving the aperiodic reference signal is predefined as the first TCI state or the second TCI state.

4. The method described in Appendix 1 or 2, wherein,

The QCL reference used to receive the aperiodic reference signal is a TCI state different from the TCI state used to receive the aperiodic reference signal last time,

in,

When the TCI state used to receive the aperiodic reference signal last time was the first TCI state, the terminal device uses the second TCI state as a QCL reference to receive the aperiodic reference signal;

When the TCI state used to receive the aperiodic reference signal last time is the second TCI state, the terminal device uses the first TCI state as a QCL reference to receive the aperiodic reference signal.

5. The method according to appendix 4, wherein the method further includes:

The terminal device receives first indication information, and the first indication information instructs the terminal device to use the default TCI state as a QCL reference to receive the aperiodic reference when the aperiodic reference signal is triggered for the first time. signal; the default TCI state is the first TCI state or the second TCI state.

6. The method according to appendix 1 or 2, wherein,

The second DCI also includes a first indication field, the first indication field indicates the TCI state required to receive the aperiodic reference signal;

The terminal device uses the TCI status indicated by the first indication field as a QCL reference to receive the aperiodic reference signal.

7. The method according to appendix 6, wherein,

The field width of the first indication field is 1 bit;

When the value of the first indication field is 0, the terminal device uses the first TCI state as a QCL reference to receive the aperiodic reference signal; when the value of the first indication field is 1, the terminal device Receive an aperiodic reference signal using the second TCI state as a QCL reference; or

When the value of the first indication field is 0, the terminal device uses the second TCI state as a QCL reference to receive the aperiodic reference signal; when the value of the first indication field is 1, the terminal device An aperiodic reference signal is received using the first TCI state as a QCL reference.

8. The method according to any one of Appendix 1-7, wherein,

The first DCI is DCI format 1_1 or DCI format 1_2;

The second DCI is DCI format 0_1 or DCI format 0_2;

The reference signal request field is CSI request;

The aperiodic reference signal is aperiodic CSI-RS.

9. A method for transmitting aperiodic reference signals, wherein the method includes:

The network device sends a first DCI, the first DCI includes a TCI field, the TCI field indicates at least two TCI states, the at least two TCI states include a first TCI state and a second TCI state;

The network device sends a second DCI, the second DCI includes a reference signal request field, and the reference signal request field is used to trigger aperiodic reference signals;

The network device sends the aperiodic reference signal, and the QCL reference used to send the aperiodic reference signal is related to the at least two TCI states.

10. The method of appendix 9, wherein the at least two TCI states include one of the following:

11. The method according to appendix 9 or 10, wherein,

The QCL reference used for transmitting the aperiodic reference signal is predefined as the first TCI state or the second TCI state.

12. The method according to appendix 9 or 10, wherein,

The QCL reference used to send the aperiodic reference signal is a TCI state different from the TCI state used to send the aperiodic reference signal last time,

in,

When the TCI state used to send the aperiodic reference signal last time was the first TCI state, the network device uses the second TCI state as the QCL reference to send the aperiodic reference signal;

When the TCI state used to send the aperiodic reference signal last time was the second TCI state, the network device uses the first TCI state as a QCL reference to send the aperiodic reference signal.

13. The method according to appendix 12, wherein the method further includes:

The network device sends first indication information, and the first indication information instructs the terminal device to use the default TCI state as a QCL reference to receive the aperiodic reference signal when the aperiodic reference signal is triggered for the first time. signal; the default TCI state is the first TCI state or the second TCI state.

14. The method according to appendix 9 or 10, wherein,

The second DCI also includes a first indication field that indicates the TCI state required to receive the aperiodic reference signal, so that the terminal device uses the TCI state indicated by the first indication field. The aperiodic reference signal is received as a QCL reference.

15. The method according to appendix 14, wherein,

The field width of the first indication field is 1 bit;

When the value of the first indication field is 0, the network device uses the first TCI state as a QCL reference to send the aperiodic reference signal; when the value of the first indication field is 1, the network device The network device sends the aperiodic reference signal using the second TCI state as a QCL reference; or

When the value of the first indication field is 0, the network device uses the second TCI state as a QCL reference to send the aperiodic reference signal; when the value of the first indication field is 1, the network device The network device sends the aperiodic reference signal using the first TCI state as a QCL reference.

16. The method according to any one of Appendix 9-15, wherein,

The first DCI is DCI format 1_1 or DCI format 1_2;

The second DCI is DCI format 0_1 or DCI format 0_2;

The reference signal request field is CSI request;

The aperiodic reference signal is aperiodic CSI-RS.

1’. A method of transmitting aperiodic reference signals, wherein the method includes:

The terminal equipment sends the aperiodic reference signal, and the QCL reference used to send the aperiodic reference signal is related to the at least two TCI states.

2’. The method according to appendix 1’, wherein the at least two TCI states include one of the following:

3’. According to the method described in appendix 1’ or 2’, wherein,

4’. According to the method described in appendix 1’ or 2’, wherein,

in,

When the TCI state used to send the aperiodic reference signal last time was the first TCI state, the terminal device uses the second TCI state as the QCL reference to send the aperiodic reference signal;

When the TCI state used for transmitting the aperiodic reference signal last time is the second TCI state, the terminal device uses the first TCI state as a QCL reference to transmit the aperiodic reference signal.

5’. The method according to appendix 4’, wherein the method further includes:

The terminal device receives second indication information, and the second indication information instructs the terminal device to use the default TCI state as a QCL reference to send the aperiodic reference when the aperiodic reference signal is triggered for the first time. signal; the default TCI state is the first TCI state or the second TCI state.

6’. According to the method described in appendix 1’ or 2’, wherein,

The second DCI also includes a second indication field, the second indication field indicates the TCI state required to send the aperiodic reference signal;

The terminal device uses the TCI status indicated by the second indication field as a QCL reference to send the aperiodic reference signal.

7’. According to the method described in Appendix 6’, wherein,

The field width of the second indication field is 1 bit;

When the value of the second indication field is 0, the terminal device uses the first TCI state as a QCL reference to send an aperiodic reference signal; when the value of the second indication field is 1, the terminal device Send an aperiodic reference signal using the second TCI state as a QCL reference; or

When the value of the second indication field is 0, the terminal device uses the second TCI state as a QCL reference to send an aperiodic reference signal; when the value of the second indication field is 1, the terminal device The aperiodic reference signal is transmitted using the first TCI state as a QCL reference.

8’. According to the method described in appendix 1’ or 2’, wherein,

The reference signal request indication field of the second DCI also indicates a sounding reference signal (SRS) resource set;

The terminal device uses the TCI state associated with the SRS resource set as a QCL reference to send the aperiodic reference signal.

9’. According to the method described in Appendix 8’, wherein,

The terminal device determines the TCI state associated with the SRS resource set indicated by the second DCI according to the association relationship between the SRS resource set and the TCI state.

10’. The method according to any one of appendices 1’-9’, wherein,

The first DCI is DCI format 1_1 or DCI format 1_2;

The second DCI is DCI format 1_1 or DCI format 1_2 or DCI format 0_1 or DCI format 0_2;

The reference signal request field is SRS request;

The aperiodic reference signal is aperiodic SRS.

11’. A method for receiving aperiodic reference signals, wherein the method includes:

The network device sends a first DCI, the first DCI includes a TCI field, the TCI field indicates at least two TCI states; the at least two TCI states include a first TCI state and a second TCI state;

The network device receives the aperiodic reference signal, and a QCL reference used to receive the aperiodic reference signal is related to the at least two TCI states.

12’. The method according to appendix 11’, wherein the at least two TCI states include one of the following:

13’. The method described in appendix 11’ or 12’, wherein,

14’. The method described in appendix 11’ or 12’, wherein,

The QCL used to receive the aperiodic reference signal is a TCI state different from the TCI state used to receive the aperiodic reference signal last time,

in,

When the TCI state used to receive the aperiodic reference signal last time was the first TCI state, the network device uses the second TCI state as a QCL reference to receive the aperiodic reference signal;

When the TCI state used for receiving the aperiodic reference signal last time is the second TCI state, the network device uses the first TCI state as a QCL reference to receive the aperiodic reference signal.

15’. The method according to appendix 14’, wherein the method further includes:

The network device sends second indication information, and the second indication information instructs the terminal device to use the default TCI state as the QCL reference to send the aperiodic reference when the aperiodic reference signal is triggered for the first time. signal; the default TCI state is the first TCI state or the second TCI state.

16’. According to the method described in appendix 11’ or 12’, wherein,

The second DCI also includes a second indication field. The second indication field indicates the TCI state required to send the aperiodic reference signal, so that the terminal device uses the TCI state indicated by the second indication field. The aperiodic reference signal is sent as a QCL reference.

17’. According to the method described in Appendix 16’, wherein,

The field width of the second indication field is 1 bit;

When the value of the second indication field is 0, the network device uses the first TCI state as a QCL reference to receive the aperiodic reference signal; when the value of the second indication field is 1, the network device The network device receives the aperiodic reference signal using the second TCI state as a QCL reference; or

When the value of the second indication field is 0, the network device uses the second TCI state as a QCL reference to receive the aperiodic reference signal; when the value of the second indication field is 1, the network device The network device receives the aperiodic reference signal using the first TCI state as a QCL reference.

18’. According to the method described in Appendix 11’ or 12’, wherein,

The network device receives the aperiodic reference signal using the TCI state associated with the SRS resource set as a QCL reference.

19’. According to the method described in Appendix 18’, wherein,

The network device determines the TCI state associated with the SRS resource set indicated by the second DCI according to the association relationship between the SRS resource set and the TCI state.

20’. The method according to any one of Appendix 11’-19’, wherein,

The first DCI is DCI format 1_1 or DCI format 1_2;

The reference signal request field is SRS request;

The aperiodic reference signal is aperiodic SRS.

1a. A terminal device, including a memory and a processor, the memory stores a computer program, the processor is configured to execute the computer program to implement any one of appendices 1 to 8 and 1' to 10' the method described.

2a. A network device, including a memory and a processor, the memory stores a computer program, the processor is configured to execute the computer program to implement any one of appendices 9 to 16 and 11' to 20' the method described.

3a. A communication system, including network equipment and terminal equipment, wherein:

The network equipment is configured to:

The terminal device is configured as:

receiving the first DCI;

receiving the second DCI;

4a. A communication system, including network equipment and terminal equipment, wherein:

The network equipment is configured to:

The terminal device is configured as:

receiving the first DCI;

receiving said receiving second DCI;

The aperiodic reference signal is transmitted, and a QCL reference used for transmitting the aperiodic reference signal is related to the at least two TCI states.

Claims

A device for receiving aperiodic reference signals, wherein the device includes:

A first receiving unit that receives first downlink control information. The first downlink control information includes a transmission configuration indication field. The transmission configuration indication field indicates at least two transmission configuration indication states. The at least two transmission configurations indicate The indication status includes a first transmission configuration indication status and a second transmission configuration indication status;

a second receiving unit that receives second downlink control information, where the second downlink control information includes a reference signal request field, and the reference signal request field is used to trigger aperiodic reference signals;

A third receiving unit is configured to receive the aperiodic reference signal, and a quasi-co-located reference used to receive the aperiodic reference signal is related to the at least two transmission configuration indication states.
The apparatus of claim 1, wherein the at least two transmission configuration indication states include one of the following:

Two joint transmission configuration indication states respectively correspond to the first transmission configuration indication state and the second transmission configuration indication state;

Two downlink transmission configuration indication states and two uplink transmission configuration indication states, the two downlink transmission configuration indication states respectively correspond to the first transmission configuration indication state and the second transmission configuration indication state;

Two downlink transmission configuration indication states and one uplink transmission configuration indication state, the two downlink transmission configuration indication states respectively corresponding to the first transmission configuration indication state and the second transmission configuration indication state;

Two downlink transmission configuration indication states respectively correspond to the first transmission configuration indication state and the second transmission configuration indication state;

A joint transmission configuration indication state and a downlink transmission configuration indication state respectively correspond to the first transmission configuration indication state and the second transmission configuration indication state;

A downlink transmission configuration indication state and a joint transmission configuration indication state respectively correspond to the first transmission configuration indication state and the second transmission configuration indication state.
The device of claim 1, wherein:

The quasi-co-located reference for receiving the aperiodic reference signal is predefined as the first transmission configuration indication state or as the second transmission configuration indication state.
The device of claim 1, wherein:

The quasi-co-located reference used to receive the aperiodic reference signal is a transmission configuration indication state different from the transmission configuration indication state used to receive the aperiodic reference signal last time,

in,

When the transmission configuration indication state used for receiving the aperiodic reference signal last time is the first transmission configuration indication state, the third receiving unit uses the second transmission configuration indication state as a quasi-co-located reference to receive the non-periodic reference signal. periodic reference signal;

When the transmission configuration indication state used for receiving the aperiodic reference signal last time is the second transmission configuration indication state, the third receiving unit uses the first transmission configuration indication state as a quasi-co-located reference to receive the non-periodic reference signal. Periodic reference signal.
The device of claim 4, further comprising:

The fourth receiving unit receives the first indication information, which instructs the terminal device to use the default transmission configuration indication state as a quasi-co-located reference to receive the aperiodic reference signal when the aperiodic reference signal is triggered for the first time. The aperiodic reference signal; the default transmission configuration indication state is the first transmission configuration indication state or the second transmission configuration indication state.
The device of claim 1, wherein:

The second downlink control information further includes a first indication field, the first indication field indicates the transmission configuration indication status required to receive the aperiodic reference signal;

The third receiving unit uses the transmission configuration indication status indicated by the first indication field as a quasi-co-located reference to receive the aperiodic reference signal.
The device of claim 6, wherein:

The field width of the first indication field is 1 bit;

When the value of the first indication field is 0, the third receiving unit uses the first transmission configuration indication state as a quasi-co-located reference to receive the aperiodic reference signal; when the value of the first indication field is 1 When, the third receiving unit uses the second transmission configuration indication state as a quasi-co-located reference to receive the aperiodic reference signal; or

When the value of the first indication field is 0, the third receiving unit uses the second transmission configuration indication state as a quasi-co-located reference to receive the aperiodic reference signal; when the value of the first indication field is 1 When , the third receiving unit uses the first transmission configuration indication state as a quasi-co-located reference to receive the aperiodic reference signal.
The device of claim 1, wherein:

The first downlink control information is DCI format 1_1 or DCI format 1_2;

The second downlink control information is DCI format 0_1 or DCI format 0_2;

The reference signal request field is CSI request;

The aperiodic reference signal is an aperiodic channel state information reference signal.
A device for sending aperiodic reference signals, wherein the device includes:

A first receiving unit that receives first downlink control information. The first downlink control information includes a transmission configuration indication field. The transmission configuration indication field indicates at least two transmission configuration indication states. The at least two transmission configurations indicate The indication status includes a first transmission configuration indication status and a second transmission configuration indication status;

a second receiving unit that receives second downlink control information, where the second downlink control information includes a reference signal request field, and the reference signal request field is used to trigger aperiodic reference signals;

A sending unit, which sends the aperiodic reference signal, and a quasi-co-located reference used to send the aperiodic reference signal is related to the at least two transmission configuration indication states.
The apparatus of claim 9, wherein the at least two transmission configuration indication states include one of the following:

Two joint transmission configuration indication states respectively correspond to the first transmission configuration indication state and the second transmission configuration indication state;

Two uplink transmission configuration indication states and two downlink transmission configuration indication states, the two uplink transmission configuration indication states respectively correspond to the first transmission configuration indication state and the second transmission configuration indication state;

Two uplink transmission configuration indication states and one downlink transmission configuration indication state, the two uplink transmission configuration indication states respectively corresponding to the first transmission configuration indication state and the second transmission configuration indication state;

Two uplink transmission configuration indication states respectively correspond to the first transmission configuration indication state and the second transmission configuration indication state;

A joint transmission configuration indication status and an uplink transmission configuration indication status respectively correspond to the first transmission configuration indication status and the second transmission configuration indication status;

An uplink transmission configuration indication state and a joint transmission configuration indication state respectively correspond to the first transmission configuration indication state and the second transmission configuration indication state.
The device of claim 9, wherein:

The quasi-co-located reference for transmitting the aperiodic reference signal is predefined as the first transmission configuration indication state or as the second transmission configuration indication state.
The device of claim 9, wherein:

The quasi-co-located reference used for transmitting the aperiodic reference signal is a transmission configuration indication state different from the transmission configuration indication state used for transmitting the aperiodic reference signal last time,

in,

When the transmission configuration indication state used for sending the aperiodic reference signal last time is the first transmission configuration indication state, the terminal device uses the second transmission configuration indication state as a quasi-co-location reference to send the aperiodic reference signal;

When the transmission configuration indication state used to send the aperiodic reference signal last time is the second transmission configuration indication state, the terminal device uses the first transmission configuration indication state as a quasi-co-location reference to send the aperiodic reference signal.
The device of claim 12, wherein the device further comprises:

The third receiving unit receives second indication information, the second indication information instructs the terminal device to use the default transmission configuration indication state as a quasi-co-located reference when the aperiodic reference signal is triggered for the first time. The aperiodic reference signal is sent; the default transmission configuration indication state is the first transmission configuration indication state or the second transmission configuration indication state.
The device of claim 9, wherein:

The second downlink control information also includes a second indication field, the second indication field indicates the transmission configuration indication status required to send the aperiodic reference signal;

The sending unit uses the transmission configuration indication status indicated by the second indication field as a quasi-co-located reference to send the aperiodic reference signal.
The device of claim 14, wherein:

The field width of the second indication field is 1 bit;

When the value of the second indication field is 0, the sending unit uses the first transmission configuration indication state as a quasi-co-located reference to send an aperiodic reference signal; when the value of the second indication field is 1, The sending unit uses the second transmission configuration indication status as a quasi-co-located reference to send aperiodic reference signals; or

When the value of the second indication field is 0, the sending unit uses the second transmission configuration indication state as a quasi-co-located reference to send an aperiodic reference signal; when the value of the second indication field is 1, The sending unit uses the first transmission configuration indication state as a quasi-co-located reference to send aperiodic reference signals.
The device of claim 9, wherein:

The reference signal request indication field of the second downlink control information also indicates a sounding reference signal resource set;

The sending unit uses the transmission configuration indication status associated with the sounding reference signal resource set as a quasi-co-located reference to send the aperiodic reference signal.
The device of claim 16, wherein:

The sending unit determines the transmission configuration indication state associated with the sounding reference signal resource set indicated by the second downlink control information according to the association relationship between the sounding reference signal resource set and the transmission configuration indication state.
The device of claim 9, wherein:

The first downlink control information is DCI format 1_1 or DCI format 1_2;

The second downlink control information is DCI format 1_1 or DCI format 1_2 or DCI format 0_1 or DCI format 0_2;

The reference signal request field is SRS request;

The aperiodic reference signal is an aperiodic detection reference signal.
A device for receiving aperiodic reference signals, wherein the device includes:

A first sending unit that sends first downlink control information, where the first downlink control information includes a transmission configuration indication field, and the transmission configuration indication field indicates at least two transmission configuration indication states; the at least two transmission configurations The indication status includes a first transmission configuration indication status and a second transmission configuration indication status;

A second sending unit that sends second downlink control information, where the second downlink control information includes a reference signal request field, and the reference signal request field is used to trigger aperiodic reference signals;

A receiving unit that receives the aperiodic reference signal, and a quasi-colocated reference used to receive the aperiodic reference signal is related to the at least two transmission configuration indication states.
The device of claim 19, wherein:

The reference signal request indication field of the second downlink control information also indicates a sounding reference signal resource set;

The receiving unit uses the transmission configuration indication status associated with the sounding reference signal resource set as a quasi-co-located reference to receive the aperiodic reference signal,

Wherein, the receiving unit determines the transmission configuration indication state associated with the sounding reference signal resource set indicated by the second downlink control information according to the association relationship between the sounding reference signal resource set and the transmission configuration indication state.