Sounding reference signal sending method and apparatus, and sounding reference signal receiving method and apparatus

Abstract

Embodiments of the present application provide a sounding reference signal (SRS) sending method and apparatus, and an SRS receiving method and apparatus. The method comprises: a terminal device receives configuration information of an SRS, wherein the terminal device performs first uplink transmission and first downlink transmission with a first transmission reception point, and / or performs second uplink transmission with a second transmission reception point; and the terminal device sends the second uplink transmission at least on the basis of a power control state for the SRS.

Description

Method and device for transmitting and receiving sounding reference signal Technical Field

[0001] The embodiments of the present application relate to the field of communication technologies. Background Art

[0002] In NR, multi-transmission reception point (multi-TRP) operation is supported, including uplink and downlink transmission. The terminal device can maintain communication links with multiple TRPs. For uplink transmission, power control is generally applied. The terminal device can estimate the path loss between the terminal device and the network equipment (such as TRP or gNB) based on the downlink path loss reference signal. The terminal device can calculate (or determine) the power of the uplink transmission based on the estimated path loss and some parameters.

[0003] It should be noted that the above introduction to the technical background is merely intended to provide a clear and complete description of the technical solutions of this application and facilitate understanding by those skilled in the art. Simply because these solutions are described in the background technology section of this application, it should not be assumed that the above technical solutions are well known to those skilled in the art.

[0004] Summary of the Invention

[0005] However, the inventors found that Release-19 will introduce asymmetric DL single TRP / UL multi-TRP operation, but there is currently no specific solution for how to control the power of the sounding reference signal (SRS), and SRS power control needs to be enhanced.

[0006] To address at least one of the above problems, embodiments of the present application provide a method and apparatus for sending and receiving a sounding reference signal.

[0007] According to one aspect of an embodiment of the present application, a method for sending a sounding reference signal is provided, including:

[0008] A terminal device receives configuration information of a sounding reference signal (SRS); wherein the terminal device performs a first uplink transmission and a first downlink transmission with a first transmission reception point, and / or performs a second uplink transmission with a second transmission reception point;

[0009] The terminal device sends the second uplink transmission based on at least a power control state for SRS.

[0010] According to another aspect of an embodiment of the present application, a device for transmitting a sounding reference signal is provided, including:

[0011] A receiving unit that receives configuration information of a sounding reference signal (SRS); wherein the terminal device performs a first uplink transmission and a first downlink transmission with a first transmission reception point, and / or performs a second uplink transmission with a second transmission reception point;

[0012] A sending unit is configured to send the second uplink transmission at least according to a power control state for the SRS.

[0013] According to another aspect of an embodiment of the present application, a method for receiving a sounding reference signal is provided, including:

[0014] The network device sends configuration information of a sounding reference signal (SRS) to a terminal device; wherein the terminal device performs a first uplink transmission and a first downlink transmission with a first transmission reception point, and / or performs a second uplink transmission with a second transmission reception point;

[0015] The network device receives the second uplink transmission sent by the terminal device at least according to the power control state for SRS.

[0016] According to another aspect of an embodiment of the present application, a device for receiving a sounding reference signal is provided, including:

[0017] a sending unit configured to send configuration information of a sounding reference signal (SRS) to a terminal device; wherein the terminal device performs a first uplink transmission and a first downlink transmission with a first transmission reception point, and / or performs a second uplink transmission with a second transmission reception point;

[0018] A receiving unit is configured to receive the second uplink transmission sent by the terminal device at least according to the power control state for SRS.

[0019] According to another aspect of an embodiment of the present application, a communication system is provided, including:

[0020] A network device that sends configuration information of a sounding reference signal (SRS) to a terminal device; wherein the terminal device performs a first uplink transmission and a first downlink transmission with a first transmission reception point, and / or performs a second uplink transmission with a second transmission reception point;

[0021] A terminal device is configured to send the second uplink transmission at least according to a power control state for the SRS.

[0022] One of the beneficial effects of the embodiments of the present application is that the terminal device sends a second uplink transmission according to the power control state used for SRS, so that appropriate SRS power control can be performed even in an uplink and downlink asymmetric TRP operation scenario, which can improve the accuracy and reliability of SRS transmission.

[0023] With reference to the following description and accompanying drawings, specific embodiments of the present application are disclosed in detail, indicating the manner in which the principles of the present application can be employed. It should be understood that the embodiments of the present application are not limited in scope. Within the spirit and scope of the appended claims, the embodiments of the present application include many variations, modifications and equivalents.

[0024] 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, combined with features in other embodiments, or substituted for features in other embodiments.

[0025] It should be emphasized that the term "include / 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The elements and features described in one figure or one embodiment of the present application can be combined with the elements and features shown in one or more other figures or embodiments. In addition, in the accompanying drawings, similar reference numerals represent corresponding parts in several figures and can be used to indicate corresponding parts used in more than one embodiment.

[0027] FIG1 is a schematic diagram of a communication system according to an embodiment of the present application;

[0028] FIG2 is a schematic diagram of a multi-TRP scenario according to an embodiment of the present application;

[0029] FIG3 is a schematic diagram of a method for sending a sounding reference signal according to an embodiment of the present application;

[0030] FIG4 is a schematic diagram of a scenario of uplink and downlink asymmetric TRP operation according to an embodiment of the present application;

[0031] FIG5 is a schematic diagram of a method for receiving a sounding reference signal according to an embodiment of the present application;

[0032] FIG6 is a schematic diagram of a device for sending a sounding reference signal according to an embodiment of the present application;

[0033] FIG7 is a schematic diagram of a device for receiving a sounding reference signal according to an embodiment of the present application;

[0034] FIG8 is a schematic diagram of a terminal device according to an embodiment of the present application;

[0035] FIG9 is a schematic diagram of a network device according to an embodiment of the present application. DETAILED DESCRIPTION

[0036] The above and other features of the present application will become apparent through the following description with reference to the accompanying drawings. In the description and the accompanying drawings, specific embodiments of the present application are disclosed in detail, which illustrate some embodiments in which the principles of the present application can be adopted. It should be understood that the present application is not limited to the described embodiments. On the contrary, the present application includes all modifications, variations and equivalents that fall within the scope of the appended claims.

[0037] In the embodiments of the present application, the terms "first", "second", etc. are used to distinguish different elements from the name, but do not indicate the spatial arrangement or temporal order of these elements, and these elements should not be limited by these terms. The term "and / or" includes any one and all combinations of one or more of the associated listed terms. The terms "comprising", "including", "having", etc. refer to the presence of the stated features, elements, components or components, but do not exclude the presence or addition of one or more other features, elements, components or components.

[0038] In the embodiments of this application, the singular forms "a," "the," etc. include plural forms and should be broadly understood to mean "a" or "a type" rather than being limited to "one." Furthermore, the term "said" should be understood to include both singular and plural forms, unless the context clearly indicates otherwise. Furthermore, the term "according to" should be understood to mean "at least in part based on...", and the term "based on" should be understood to mean "at least in part based on...", unless the context clearly indicates otherwise.

[0039] In the embodiments of the present 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), enhanced Long Term Evolution (LTE-A, LTE-Advanced), Wideband Code Division Multiple Access (WCDMA), High-Speed ​​Packet Access (HSPA), etc.

[0040] Furthermore, communication between devices in the communication system may be carried out according to communication protocols of any stage, for example, including but not limited to the following communication protocols: 1G (generation), 2G, 2.5G, 2.75G, 3G, 4G, 4.5G and 5G, New Radio (NR), etc., and / or other communication protocols currently known or to be developed in the future.

[0041] In the embodiments of the present application, the term "network device" refers to, for example, a device in a communication system that connects a terminal device to the communication network and provides services to the terminal device. Network devices may include, but are not limited to, the following devices: base station (BS), access point (AP), transmission reception point (TRP), broadcast transmitter, mobile management entity (MME), gateway, server, radio network controller (RNC), base station controller (BSC), etc.

[0042] Among them, base stations may include but are not limited to: Node B (NodeB or NB), evolved Node B (eNodeB or eNB) and 5G base station (gNB), etc., and may also include remote radio heads (RRH, Remote Radio Head), remote radio units (RRU, Remote Radio Unit), relays or low-power nodes (such as femeto, pico, etc.), IAB (Integrated Access and Backhaul) nodes or IAB-DU or IAB-donor. The term "base station" may include some or all of their functions, and each base station can provide communication coverage for a specific geographical area. The term "cell" can refer to a base station and / or its coverage area, depending on the context in which the term is used. The terms "cell" and "base station" can be used interchangeably without causing confusion.

[0043] In the embodiments of the present application, the term "user equipment" (UE) or "terminal equipment" (TE) refers to, for example, a device that accesses a communication network through a network device and receives network services. A terminal device can be fixed or mobile and may also be referred to as a mobile station (MS), a terminal, a subscriber station (SS), an access terminal (AT), an IAB-MT, a station, and so on.

[0044] Among them, terminal devices may include but are not limited to the following devices: cellular phones, personal digital assistants (PDAs), wireless modems, wireless communication devices, handheld devices, machine-type communication devices, laptop computers, cordless phones, smart phones, smart watches, digital cameras, etc.

[0045] 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 measurement, including but not limited to: machine type communication (MTC) terminal, vehicle-mounted communication terminal, device-to-device (D2D) terminal, machine-to-machine (M2M) terminal, and so on.

[0046] In addition, the term "network side" or "network device side" refers to one side of the network, which can be a base station or one or more network devices as described above. The term "user side" or "terminal side" or "terminal device side" refers to the user or terminal side, which can be a UE or one or more terminal devices as described above. Unless otherwise specified herein, "device" can refer to either network equipment or terminal equipment.

[0047] The following describes the scenarios of the embodiments of the present application through examples, but the present application is not limited thereto.

[0048] FIG1 is a schematic diagram of a communication system according to an embodiment of the present application, schematically illustrating a situation using a terminal device and a network device as an example. As shown in FIG1 , a communication system 100 may include a network device 101 and a terminal device 102. For simplicity, FIG1 illustrates only one terminal device and one network device as an example, but the embodiments of the present application are not limited thereto. For example, multiple terminal devices may be provided.

[0049] In the embodiment of the present application, existing services or future services can be transmitted between the network device 101 and the terminal device 102. For example, these services may include, but are not limited to, enhanced mobile broadband (eMBB), massive machine type communication (mMTC), and ultra-reliable and low-latency communication (URLLC), etc.

[0050] Figure 2 is a schematic diagram of a multi-TRP scenario in an embodiment of the present application. A TRP can be part of a network device (e.g., a gNB) that receives signals from a terminal device, or part of a network device (gNB) that sends signals to a terminal device. Furthermore, a TRP can also represent a set of downlink control information (DCI) or a set of reference signals, etc.

[0051] As shown in Figure 2, in the scenario of multi-TRP operation, the terminal device can have panel 1 (pannel-1) and panel 2 (pannel-2); a serving cell can schedule the terminal device from 2 TRPs to provide better physical downlink shared channel (PDSCH) coverage, reliability and / or data rate.

[0052] For multi-TRP operation, there are two different operating modes: single DCI and multi-DCI. In both modes, control of uplink and downlink operations is handled by the physical layer and the media access control (MAC). In single-DCI mode, the terminal device is scheduled by both TRPs using the same DCI; in multi-DCI mode, the terminal device is scheduled by a separate DCI for each TRP.

[0053] In the embodiments of the present application, the signaling may be, for example, radio resource control (RRC) signaling; for example, an RRC message, including, for example, an MIB, system information, or a dedicated RRC message; or an RRC information element (RRC IE). The signaling may also be, for example, MAC (Medium Access Control) signaling; or a MAC control element (MAC CE). However, the present application is not limited thereto.

[0054] In the following description, to avoid confusion, the terms "PUCCH" and "physical uplink control channel" or "uplink control information" are interchangeable, and the terms "PUSCH" and "physical uplink data channel" or "uplink data" are interchangeable. Furthermore, transmitting or receiving a PUCCH can be understood as transmitting or receiving downlink control information carried by the PUCCH; transmitting or receiving a PUSCH can be understood as transmitting or receiving downlink data carried by the PUSCH. The terms "PRACH" and "physical random access channel" or "random access information" are interchangeable. Furthermore, transmitting or receiving a PRACH can be understood as transmitting or receiving random access information carried by the PRACH.

[0055] In an embodiment of the present application, the index or identifier of the transmission reception point may include: the index of the control resource pool (control resource pool) corresponding to the transmission reception point, the index or identifier of the transmission reception point, and the index of the reference signal set (RS set) corresponding to the transmission reception point. Therefore, the term "transmission reception point" can also be expressed as "reference signal set" or "control resource pool", etc.

[0056] Embodiments of the first aspect

[0057] An embodiment of the present application provides a method for sending a sounding reference signal, which is described from the perspective of a terminal device.

[0058] FIG3 is a schematic diagram of a method for sending a sounding reference signal according to an embodiment of the present application. As shown in FIG3 , the method includes:

[0059] 301. A terminal device receives configuration information of a sounding reference signal (SRS); wherein the terminal device performs a first uplink transmission and a first downlink transmission with a first transmission reception point, and / or performs a second uplink transmission with a second transmission reception point;

[0060] 302. The terminal device sends the second uplink transmission at least according to the power control state for SRS.

[0061] It is worth noting that FIG3 above is merely a schematic illustration of an embodiment of the present application, and the present application is not limited thereto. For example, the execution order of the various operations may be appropriately adjusted, and other operations may be added or some operations may be reduced. Those skilled in the art may make appropriate modifications based on the above description, and are not limited to the description of FIG3 above.

[0062] FIG4 is a schematic diagram of a scenario of asymmetric uplink and downlink TRP operation according to an embodiment of the present application. Asymmetric uplink and downlink TRP operation may also be referred to as asymmetric DL sTRP / UL mTRP operation. For example, as shown in FIG4 , downlink transmission is based on a single TRP, i.e., the UE only receives downlink transmissions from one TRP, while uplink transmission is based on multiple TRPs, i.e., uplink transmissions can be directed to multiple TRPs, such as two TRPs.

[0063] As shown in Figure 4, some UL-only sites (e.g., a second transmission and reception point, hereinafter also referred to as a UL-only TRP or UL-only site) may be deployed in a macro site (e.g., a first transmission and reception point, hereinafter also referred to as a DL / UL TRP or DL / UL site). A macro site is a site with DL / UL, that is, downlink transmissions originate from the macro site, while uplink transmissions can be directed toward the macro site and the UL-only site.

[0064] Since the downlink transmission only comes from sites with DL / UL, for the uplink power control of the UL-only site, the path loss cannot be estimated by the downlink signal, so there is a mismatch between the uplink transmission and the path loss reference signal. In an embodiment of the present application, the terminal device sends a second uplink transmission (SRS transmission) at least according to the power control state used for SRS, thereby improving the accuracy and reliability of SRS transmission. In addition to the power control state of SRS, the factors related to the power control of SRS transmission also include other parameters. For details, please refer to the power calculation formula and other related technologies, which will not be repeated here.

[0065] In some embodiments, the power control state for the SRS is different from a closed-loop power control state for a physical uplink shared channel (PUSCH).

[0066] For example, for asymmetric DL sTRP / UL mTRP operation, an SRS closed-loop power control state independent of PUSCH can be introduced.

[0067] In some embodiments, for at least one of the following SRS usage parameters: codebook, non-codebook, antenna switching, and beam management, the SRS resource set is configured as one of the following:

[0068] The same first closed-loop power control state as PUSCH;

[0069] The same second closed-loop power control state as PUSCH;

[0070] a first closed-loop power control state different from that of the PUSCH;

[0071] A second closed-loop power control state different from that of PUSCH.

[0072] In some embodiments, the SRS usage parameter is codebook and / or non-codebook, and the SRS resource set is configured as one of the following:

[0073] The same first closed-loop power control state as PUSCH;

[0074] The second closed-loop power control state is the same as that of PUSCH.

[0075] In some embodiments, the SRS usage parameter is antenna switching, and the SRS resource set is configured as one of the following:

[0076] a first closed-loop power control state different from that of the PUSCH;

[0077] A second closed-loop power control state different from that of PUSCH.

[0078] In some embodiments, the SRS usage parameter is antenna switching, and the SRS resource set may be configured to have a power control state that is independent of the PUSCH and associated with a DL / UL capable site.

[0079] In some embodiments, the SRS usage parameter is beam management, and the SRS resource set is configured as one of the following:

[0080] a first closed-loop power control state different from that of the PUSCH;

[0081] A second closed-loop power control state different from that of PUSCH.

[0082] In some embodiments, for uplink and downlink asymmetric transmission reception point (asymmetric DL single TRP / UL multi-TRP) operation, an SRS resource set is configured with a power control state; for the same SRS usage parameters (usage), the number of SRS resource sets for uplink and downlink asymmetric transmission reception point (asymmetric DL single TRP / UL multi-TRP) operation is greater than the number of SRS resource sets for single transmission reception point (single TRP) operation.

[0083] For example, for asymmetric DL sTRP / UL mTRP operation, one SRS resource set is configured with one power control state. For the same usage, the number of SRS resource sets can be expanded, for example, it can be twice the number of SRS resource sets used for a single TRP operation with the same usage. Alternatively, the number of SRS resource sets is the same as the number of SRS resource sets used for a single TRP operation with the same usage.

[0084] For another example, the power control state of the SRS resource set may be overridden by MAC CE or DCI.

[0085] In some embodiments, for asymmetric DL single TRP / UL multi-TRP operation, one SRS resource set is configured with two power control states, and the applied power control state is indicated via MAC CE and / or DCI.

[0086] For example, the two power control states are different from the power control state of the PUSCH. For another example, one of the two power control states is the same as the power control state of the PUSCH, while the other power control state is different from the power control state of the PUSCH. For another example, the two power control states are the same as the power control state of the PUSCH.

[0087] For another example, the MAC CE or DCI may further indicate which power control state to apply.

[0088] In some embodiments, for asymmetric DL single TRP / UL multi-TRP operation, two SRS resource sets with SRS usage parameters of codebook and / or non-codebook are configured, and the applied TRP is indicated by a field in the DCI.

[0089] For example, for asymmetric DL sTRP / UL mTRP operation, two SRS resource sets (usage is codebook / nonCodebook) can be configured for codebook / nonCodebook based PUSCH transmission. The SRS resource set indication field can be used to indicate which TRP is applied.

[0090] In one example, the codepoint of the SRS resource set indication field may be used as follows: a site with DL / UL or a site with UL-only for uplink reception.

[0091] - Code point "00": the SRI field and the precoding information and number of layers fields are associated with the first SRS resource set;

[0092] - Code point "01": the SRI field, precoding information, and layer number field are associated with the second SRS resource set;

[0093] - Code point "10": reserved;

[0094] - Code point "11": reserved.

[0095] In another example, the codepoint of the SRS resource set indication field can be used as follows: a site with DL / UL (DL / UL site) or a UL-only site (UL-only site) is used for uplink reception, or both sites are used for uplink reception (PUSCH is sent in a repeated manner).

[0096] - Code point "00": the SRI field, precoding information, and layer number field are associated with the first SRS resource set;

[0097] - Code point "01": the SRI field, precoding information, and layer number field are associated with the second SRS resource set;

[0098] - Code point "10": the SRI field, precoding information, and layer number field are associated with the first SRS resource set, and the second SRI field, second precoding information, and layer number field are associated with the second SRS resource set;

[0099] - Code point "11": reserved or the same as code point "10".

[0100] In another example, the codepoint of the SRS resource set indication field can be used as follows: a site with DL / UL (DL / UL site) or a UL-only site (UL-only site) is used for uplink reception, or both sites are used for uplink reception (PUSCH is sent in a non-repeated manner).

[0101] - Code point "00": the SRI field, precoding information, and layer number field are associated with the first SRS resource set;

[0102] - Code point "01": the SRI field, precoding information, and layer number field are associated with the second SRS resource set;

[0103] - Code point "10": the SRI field, precoding information, and layer number field are associated with the first SRS resource set, and the second SRI field, second precoding information, and layer number field are associated with the second SRS resource set;

[0104] - Code point "11": reserved or the same as code point "10".

[0105] In some embodiments, for uplink and downlink asymmetric transmission reception point (asymmetric DL single TRP / UL multi-TRP) operation, two SRS resource sets with SRS usage parameters (usage) as non-codebook are configured, then the CSI-RS associated with the SRS resource set is not configured, or, the SRS resource set associated with the first transmission reception point is configured with the associated CSI-RS.

[0106] For example, for asymmetric DL sTRP / UL mTRP operation, for non-codebook-based PUSCH transmission, when two SRS resource sets are configured (usage is nonCodebook), no associated CSI-RS is configured. Alternatively, only one SRS resource set associated with a site with DL / UL (e.g., the first SRS resource set) can be configured with an associated CSI-RS.

[0107] For another example, for asymmetric DL sTRP / UL mTRP operation, for non-codebook-based PUSCH transmission, only one SRS resource set is configured, and the SRS resource set is configured with an associated CSI-RS. For example, it can be applied to FR1.

[0108] For another example, for asymmetric DL sTRP / UL mTRP operation, for non-codebook based PUSCH transmission, only one SRS resource set is configured, and the SRS resource set is not configured with associated CSI-RS.

[0109] In some embodiments, for uplink and downlink asymmetric transmission reception point (asymmetric DL single TRP / UL multi-TRP) operation, an SRS resource set with an SRS usage parameter of antenna switching is used for the first transmission reception point.

[0110] For example, for asymmetric DL sTRP / UL mTRP operation, for antenna switching, the SRS resource set (usage is antennaSwitching) is only used for sites with DL / UL (DL / UL site). Alternatively, the SRS resource set (usage is antennaSwitching) can be used for sites with DL / UL (DL / UL site) and UL-only sites (UL-only site).

[0111] The above schematically illustrates SRS, and the following will further illustrate DCI enhancement.

[0112] In some embodiments, DCI format 2_3 is used to trigger SRS transmission, and the power control state of the SRS transmission is configured to be different from the power control state of the PUSCH.

[0113] For example, DCI format 2_3 can be applied to trigger SRS transmission configured with a power control state different from that of PUSCH (first power control state or second power control state). In addition, the restriction that DCI format 2_3 is applied to PUSCH-less cells can be removed.

[0114] In some embodiments, DCI format 2_3 is used to trigger SRS transmission, and the power control state of the SRS transmission is configured to be the same as the power control state of the PUSCH.

[0115] For example, for DCI format 2_3, it can be applied to trigger SRS transmission configured with the same power control state as PUSCH (first power control state or second power control state).

[0116] In one example, DCI format 2_3 is used to trigger SRS transmission with usage of antenna switching, or DCI format 2_3 is used to trigger one or more or all of the following SRS usages: codebook, non-codebook, antenna switching, and beam management.

[0117] In another example, the closed-loop power control state may be indicated by DCI format 2_3. For example, a new field may be introduced into each block of DCI format 2_3 to indicate the power control state.

[0118] In yet another example, a second TPC command may be added to each block of DCI format 2_3. The mapping between the TPC command and the SRS power control state may be explicitly indicated or may be implicitly defined.

[0119] In another example, a new RNTI may be introduced for DCI format 2_3.

[0120] In some embodiments, a first DCI format is used for power control of SRS transmission, the first DCI format indicating at least one of the following: an SRS request, a transmit power control (TPC) command, and an SRS power control state.

[0121] For example, a new DCI format may be introduced for SRS power control. The new DCI format may indicate one or more or all of the following information: SRS request, TPC command (possibly with one TPC command field or two TPC command fields), and SRS power control status.

[0122] In some embodiments, the first DCI format is used for one or a group of terminal devices; wherein a first RNTI is used for the first DCI format.

[0123] For example, a new DCI format may be applied to a single UE or a group of UEs. For another example, a new RNTI may be introduced for the new DCI format.

[0124] In some embodiments, DCI format 0_1 ​​or DCI format 0_2 or DCI format 1_1 or DCI format 1_2 is used to trigger SRS transmission; wherein, the transmission power control (TPC) command carried by the DCI is used to trigger SRS, and the added field or reused field in the DCI is used to indicate the SRS power control state.

[0125] For example, for DCI formats 0_1 / 0_2 / 1_1 / 1_2 that can trigger SRS transmission, the TPC command carried by the DCI can be used to trigger SRS. The SRS power control state can be indicated by a newly added field, or by reusing an existing field, or by reusing some unused fields.

[0126] The above embodiments are merely exemplary of the present invention, but the present invention is not limited thereto. Appropriate modifications may be made based on the above embodiments. For example, the above embodiments may be used alone, or one or more of the above embodiments may be combined.

[0127] It can be seen from the above embodiments that the terminal device sends the second uplink transmission according to the power control state used for SRS, so even in the uplink and downlink asymmetric TRP operation scenario, appropriate SRS power control can be performed, which can improve the accuracy and reliability of SRS transmission.

[0128] Embodiments of the second aspect

[0129] The embodiment of the present application provides a method for receiving a sounding reference signal, which is described from the perspective of a network device. The embodiment of the second aspect can be combined with the embodiment of the first aspect, and the same contents as the embodiment of the first aspect will not be repeated.

[0130] FIG5 is a schematic diagram of a method for receiving a sounding reference signal according to an embodiment of the present application. As shown in FIG5 , the method includes:

[0131] 501. A network device sends configuration information of a sounding reference signal (SRS) to a terminal device; wherein the terminal device performs a first uplink transmission and a first downlink transmission with a first transmission reception point, and / or performs a second uplink transmission with a second transmission reception point;

[0132] 502. The network device receives a second uplink transmission, wherein the terminal device sends the second uplink transmission at least according to a power control state for SRS.

[0133] It is worth noting that FIG5 above is merely a schematic illustration of an embodiment of the present application, and the present application is not limited thereto. For example, the execution order of the various operations may be appropriately adjusted, and other operations may be added or some operations may be reduced. Those skilled in the art may make appropriate modifications based on the above description, and are not limited to the description of FIG5 above.

[0134] The above embodiments are merely exemplary of the present invention, but the present invention is not limited thereto. Appropriate modifications may be made based on the above embodiments. For example, the above embodiments may be used alone, or one or more of the above embodiments may be combined.

[0135] Through the embodiments of the present application, the terminal device sends a second uplink transmission according to the power control state used for SRS, so that appropriate SRS power control can be performed even in an uplink and downlink asymmetric TRP operation scenario, which can improve the accuracy and reliability of SRS transmission.

[0136] Embodiments of the third aspect

[0137] The embodiment of the present application provides a device for transmitting a sounding reference signal. The device may be, for example, a terminal device, or one or more components or assemblies configured in the terminal device. The contents that are the same as those in the embodiment of the first aspect are not repeated here.

[0138] FIG6 is a schematic diagram of a device for transmitting a sounding reference signal according to an embodiment of the present application. As shown in FIG6 , the device for transmitting a sounding reference signal 600 includes:

[0139] A receiving unit 601 receives configuration information of a sounding reference signal (SRS); wherein the terminal device performs a first uplink transmission and a first downlink transmission with a first transmission reception point, and / or performs a second uplink transmission with a second transmission reception point;

[0140] The sending unit 602 is configured to send the second uplink transmission at least according to the power control state for the SRS.

[0141] In some embodiments, the power control state for the SRS is different from a closed-loop power control state for a physical uplink shared channel (PUSCH).

[0142] In some embodiments, for at least one of the following SRS usage parameters: codebook, non-codebook, antenna switching, and beam management, the SRS resource set is configured as one of the following:

[0143] The same first closed-loop power control state as PUSCH;

[0144] The same second closed-loop power control state as PUSCH;

[0145] a first closed-loop power control state different from that of the PUSCH;

[0146] A second closed-loop power control state different from that of PUSCH.

[0147] In some embodiments, the SRS usage parameter is codebook and / or non-codebook, and the SRS resource set is configured as one of the following:

[0148] The same first closed-loop power control state as PUSCH;

[0149] The second closed-loop power control state is the same as that of PUSCH.

[0150] In some embodiments, the SRS usage parameter is antenna switching, and the SRS resource set is configured as one of the following:

[0151] a first closed-loop power control state different from that of the PUSCH;

[0152] A second closed-loop power control state different from that of PUSCH.

[0153] In some embodiments, the SRS usage parameter is beam management, and the SRS resource set is configured as one of the following:

[0154] a first closed-loop power control state different from that of the PUSCH;

[0155] A second closed-loop power control state different from that of PUSCH.

[0156] In some embodiments, for asymmetric DL single TRP / UL multi-TRP operation, one SRS resource set is configured with one power control state.

[0157] In some embodiments, for the same SRS usage parameters, the number of SRS resource sets operated by asymmetric DL single TRP / UL multi-TRP is greater than the number of SRS resource sets operated by a single TRP.

[0158] In some embodiments, for asymmetric DL single TRP / UL multi-TRP operation, one SRS resource set is configured with two power control states, and the applied power control state is indicated via MAC CE and / or DCI.

[0159] In some embodiments, the two power control states are different from the power control state of PUSCH, or one of the two power control states is the same as the power control state of PUSCH and the other power control state is different from the power control state of PUSCH, or the two power control states are the same as the power control state of PUSCH.

[0160] In some embodiments, for asymmetric DL single TRP / UL multi-TRP operation, two SRS resource sets with SRS usage parameters of codebook and / or non-codebook are configured, and the applied TRP is indicated by a field in the DCI.

[0161] In some embodiments, for uplink and downlink asymmetric transmission reception point (asymmetric DL single TRP / UL multi-TRP) operation, two SRS resource sets with SRS usage parameters (usage) as non-codebook are configured, then the CSI-RS associated with the SRS resource set is not configured, or, the SRS resource set associated with the first transmission reception point is configured with the associated CSI-RS.

[0162] In some embodiments, for uplink and downlink asymmetric transmission reception point (asymmetric DL single TRP / UL multi-TRP) operation, an SRS resource set with an SRS usage parameter of antenna switching is used for the first transmission reception point.

[0163] In some embodiments, DCI format 2_3 is used to trigger SRS transmission, and the power control state of the SRS transmission is configured to be different from the power control state of the PUSCH.

[0164] In some embodiments, DCI format 2_3 is used to trigger SRS transmission, and the power control state of the SRS transmission is configured to be the same as the power control state of the PUSCH.

[0165] In some embodiments, a first DCI format is used for power control of SRS transmission, the first DCI format indicating at least one of the following: an SRS request, a transmit power control (TPC) command, and an SRS power control state.

[0166] In some embodiments, the first DCI format is used for one or a group of terminal devices; wherein a first RNTI is used for the first DCI format.

[0167] In some embodiments, DCI format 0_1 ​​or DCI format 0_2 or DCI format 1_1 or DCI format 1_2 is used to trigger SRS transmission.

[0168] In some embodiments, a transmission power control (TPC) command carried by a DCI is used to trigger the SRS, and an added field or a reused field in the DCI is used to indicate the SRS power control state.

[0169] It is worth noting that the above description only describes the components or modules related to the present application, but the present application is not limited thereto. The apparatus 600 for transmitting a sounding reference signal may further include other components or modules. For details of these components or modules, reference may be made to related technologies.

[0170] In addition, for the sake of simplicity, FIG6 only illustrates the connection relationship or signal direction between various components or modules. However, it should be clear to those skilled in the art that various related technologies such as bus connection can be used. The above-mentioned components or modules can be implemented by hardware facilities such as processors, memories, transmitters, and receivers; the implementation of this application is not limited to this.

[0171] Through the embodiments of the present application, the terminal device sends a second uplink transmission according to the power control state used for SRS, so that appropriate SRS power control can be performed even in an uplink and downlink asymmetric TRP operation scenario, which can improve the accuracy and reliability of SRS transmission.

[0172] Embodiments of the fourth aspect

[0173] The present embodiment provides a device for receiving a sounding reference signal. The device may be, for example, a network device, or one or more components or assemblies configured in the network device. The contents identical to those in the first to third aspects of the embodiment are not repeated here.

[0174] FIG7 is a schematic diagram of a device for receiving a sounding reference signal according to an embodiment of the present application. As shown in FIG7 , the device for receiving a sounding reference signal 700 includes:

[0175] A sending unit 701, which sends configuration information of a sounding reference signal (SRS) to a terminal device; wherein the terminal device performs a first uplink transmission and a first downlink transmission with a first transmission reception point, and / or performs a second uplink transmission with a second transmission reception point;

[0176] A receiving unit 702 is configured to receive the second uplink transmission sent by the terminal device at least according to the power control state for the SRS.

[0177] It is worth noting that the above only describes the components or modules related to the present application, but the present application is not limited thereto. The apparatus 700 for receiving a sounding reference signal may further include other components or modules. For details of these components or modules, reference may be made to related technologies.

[0178] In addition, for the sake of simplicity, FIG7 only illustrates the connection relationship or signal direction between various components or modules. However, it should be clear to those skilled in the art that various related technologies such as bus connection can be used. The above-mentioned components or modules can be implemented by hardware facilities such as processors, memories, transmitters, and receivers; the implementation of this application is not limited to this.

[0179] Through the embodiments of the present application, the terminal device sends a second uplink transmission according to the power control state used for SRS, so that appropriate SRS power control can be performed even in an uplink and downlink asymmetric TRP operation scenario, which can improve the accuracy and reliability of SRS transmission.

[0180] Embodiments of the fifth aspect

[0181] An embodiment of the present application also provides a communication system, and reference may be made to FIG1 . The contents that are the same as those in the first to fourth aspects of the embodiments will not be repeated.

[0182] In some embodiments, the communication system 100 may include at least:

[0183] A network device that sends configuration information of a sounding reference signal (SRS) to a terminal device; wherein the terminal device performs a first uplink transmission and a first downlink transmission with a first transmission reception point, and / or performs a second uplink transmission with a second transmission reception point;

[0184] A terminal device is configured to send the second uplink transmission at least according to a power control state for the SRS.

[0185] The embodiment of the present application also provides a terminal device, but the present application is not limited thereto and may also be other devices.

[0186] Figure 8 is a schematic diagram of a terminal device according to an embodiment of the present application. As shown in Figure 8 , terminal device 800 may include a processor 810 and a memory 820. Memory 820 stores data and programs and is coupled to processor 810. It should be noted that this diagram is exemplary; other types of structures may be used to supplement or replace this structure to implement telecommunication or other functions.

[0187] For example, the processor 810 may be configured to execute a program to implement the method for transmitting a sounding reference signal as described in the embodiment of the first aspect. For example, the processor 810 may be configured to perform the following control: receiving configuration information of a sounding reference signal (SRS); wherein the terminal device performs a first uplink transmission and a first downlink transmission with a first transmission reception point, and / or performs a second uplink transmission with a second transmission reception point; and transmitting the second uplink transmission based on at least a power control state for the SRS.

[0188] As shown in Figure 8 , the terminal device 800 may further include: a communication module 830, an input unit 840, a display 850, and a power supply 860. The functions of these components are similar to those in the prior art and are not described in detail here. It is worth noting that the terminal device 800 does not necessarily include all of the components shown in Figure 8 , and these components are not essential. Furthermore, the terminal device 800 may also include components not shown in Figure 8 , for which reference may be made to the prior art.

[0189] An embodiment of the present application further provides a network device, which may be, for example, a base station, but the present application is not limited thereto and may also be other network devices.

[0190] Figure 9 is a schematic diagram illustrating the structure of a network device according to an embodiment of the present application. As shown in Figure 9 , network device 900 may include a processor 910 (e.g., a central processing unit (CPU)) and a memory 920 ; the memory 920 is coupled to the processor 910 . The memory 920 may store various data and may also store an information processing program 930 , which is executed under the control of the processor 910 .

[0191] For example, the processor 910 may be configured to execute a program to implement the method for receiving a sounding reference signal as described in the embodiment of the second aspect. For example, the processor 910 may be configured to perform the following control: sending configuration information of a sounding reference signal (SRS) to a terminal device; wherein the terminal device performs a first uplink transmission and a first downlink transmission with a first transmission reception point, and / or performs a second uplink transmission with a second transmission reception point; and receiving the second uplink transmission sent by the terminal device at least according to a power control state for the SRS.

[0192] In addition, as shown in Figure 9, network device 900 may further include: a transceiver 940 and an antenna 950; wherein, the functions of these components are similar to those in the prior art and are not further described here. It is worth noting that network device 900 does not necessarily include all the components shown in Figure 9; in addition, network device 900 may also include components not shown in Figure 9, and reference may be made to the prior art for details.

[0193] An embodiment of the present application further provides a computer program, wherein when the program is executed in a terminal device, the program causes the terminal device to execute the method for sending a sounding reference signal as described in the embodiment of the first aspect.

[0194] An embodiment of the present application further provides a storage medium storing a computer program, wherein the computer program enables a terminal device to execute the method for sending a sounding reference signal as described in the embodiment of the first aspect.

[0195] An embodiment of the present application further provides a computer program, wherein when the program is executed in a network device, the program causes the network device to execute the method for receiving a sounding reference signal as described in the embodiment of the second aspect.

[0196] An embodiment of the present application further provides a storage medium storing a computer program, wherein the computer program enables a network device to execute the method for receiving a sounding reference signal as described in the embodiment of the second aspect.

[0197] The above devices and methods of the present application can be implemented by hardware or by a combination of hardware and software. The present application relates to such a computer-readable program that, when executed by a logic component, enables the logic component to implement the devices or components described above, or enables the logic component to implement the various methods or steps described above. The present application also relates to a storage medium for storing the above program, such as a hard disk, a magnetic disk, an optical disk, a DVD, a flash memory, etc.

[0198] The method / device described in conjunction with the embodiments of the present application can be directly embodied as hardware, a software module executed by a processor, or a combination of the two. For example, one or more of the functional block diagrams shown in the figure and / or one or more combinations of functional block diagrams can correspond to various software modules of the computer program flow or to various hardware modules. 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, for example, using a field programmable gate array (FPGA).

[0199] The software module may be located in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. A storage medium may be coupled to a processor so 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 the storage medium may be located in an ASIC. The software module may 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 large-capacity MEGA-SIM card or a large-capacity flash memory device, the software module may be stored in the MEGA-SIM card or the large-capacity flash memory device.

[0200] One or more of the functional blocks and / or one or more combinations of functional blocks described in the accompanying drawings may be implemented as a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, or any appropriate combination thereof for performing the functions described in this application. One or more of the functional blocks and / or one or more combinations of functional blocks described in the accompanying drawings may also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in communication with a DSP, or any other such configuration.

[0201] The present application has been described above in conjunction with specific embodiments. However, those skilled in the art should understand that these descriptions are merely illustrative and are not intended to limit the scope of protection of the present application. Those skilled in the art may make various modifications and variations to the present application based on the spirit and principles of the present application, and such modifications and variations are also within the scope of the present application.

[0202] Regarding the implementation methods including the above embodiments, the following additional notes are also disclosed:

[0203] 1. A method for transmitting a sounding reference signal, comprising:

[0204] A terminal device receives configuration information of a sounding reference signal (SRS); wherein the terminal device performs a first uplink transmission and a first downlink transmission with a first transmission reception point, and / or performs a second uplink transmission with a second transmission reception point;

[0205] The terminal device sends the second uplink transmission based on at least a power control state for SRS.

[0206] 2. A method for receiving a sounding reference signal, comprising:

[0207] The network device sends configuration information of a sounding reference signal (SRS) to a terminal device; wherein the terminal device performs a first uplink transmission and a first downlink transmission with a first transmission reception point, and / or performs a second uplink transmission with a second transmission reception point;

[0208] The network device receives the second uplink transmission sent by the terminal device at least according to the power control state for SRS.

[0209] 3. A terminal device comprises a memory and a processor, wherein the memory stores a computer program, and the processor is configured to execute the computer program to implement the method for sending a sounding reference signal as described in Note 1.

[0210] 4. A network device comprising a memory and a processor, wherein the memory stores a computer program, and the processor is configured to execute the computer program to implement the method for receiving a sounding reference signal as described in Note 2.

[0211] 5. A computer program product, comprising at least a computer program, wherein when the computer program is executed by a processor, the terminal device executes the method for sending a sounding reference signal as described in Note 1.

[0212] 6. A computer program product, comprising at least a computer program, wherein when the computer program is executed by a processor, the network device executes the method for receiving a sounding reference signal as described in Note 2.

Claims

1. A device for transmitting a sounding reference signal, comprising: a receiving unit configured to receive configuration information of a sounding reference signal; The terminal device performs a first uplink transmission and a first downlink transmission with the first transmission reception point, and / or performs a second uplink transmission with the second transmission reception point; A sending unit is configured to send the second uplink transmission at least according to a power control state for a sounding reference signal.

2. The device according to claim 1, wherein The power control state for the sounding reference signal is different from the closed-loop power control state for the physical uplink shared channel.

3. The device according to claim 1, wherein For at least one of the following SRS usage parameters: codebook, non-codebook, antenna switching, and beam management, the sounding reference signal resource set is configured as one of the following: The same first closed-loop power control state as PUSCH; The same second closed-loop power control state as PUSCH; a first closed-loop power control state different from that of the PUSCH; A second closed-loop power control state different from that of PUSCH.

4. The device according to claim 1, wherein The SRS usage parameter is codebook and / or non-codebook, and the SRS resource set is configured as one of the following: The same first closed-loop power control state as PUSCH; The second closed-loop power control state is the same as that of PUSCH.

5. The device according to claim 1, wherein The SRS usage parameter is antenna switching, and the sounding reference signal resource set is configured as one of the following: a first closed-loop power control state different from that of the PUSCH; A second closed-loop power control state different from that of PUSCH.

6. The device according to claim 1, wherein The SRS usage parameters are beam management, and the sounding reference signal resource set is configured as one of the following: a first closed-loop power control state different from that of the PUSCH; A second closed-loop power control state different from that of PUSCH.

7. The device according to claim 1, wherein A sounding reference signal resource set is configured with a power control state; For the same sounding reference signal usage parameters, the number of sounding reference signal resource sets in the uplink and downlink asymmetric transmission reception point operation is greater than the number of sounding reference signal resource sets in the single transmission reception point operation.

8. The device according to claim 1, wherein One SRS resource set is configured with two power control states, and the applied power control state is indicated through MAC CE and / or DCI.

9. The device according to claim 8, wherein The two power control states are both different from the power control state of the PUSCH, or one of the two power control states is the same as the power control state of the PUSCH and the other power control state is different from the power control state of the PUSCH, or the two power control states are the same as the power control state of the PUSCH.

10. The device according to claim 1, wherein The SRS is configured with two SRS resource sets using parameters of codebook and / or non-codebook, and the applied transmission reception point is indicated through a field in the DCI.

11. The device according to claim 1, wherein If two sounding reference signal resource sets with non-codebook sounding reference signal usage parameters are configured, the CSI-RS associated with the sounding reference signal resource set is not configured, or the sounding reference signal resource set associated with the first transmission reception point is configured with the associated CSI-RS.

12. The device according to claim 1, wherein The sounding reference signal usage parameter is a sounding reference signal resource set with antenna switching used for the first transmission reception point.

13. The device according to claim 1, wherein DCI format 2_3 is used to trigger the transmission of a sounding reference signal, the power control state of which is configured to be different from the power control state of the PUSCH.

14. The device according to claim 1, wherein DCI format 2_3 is used to trigger the transmission of a sounding reference signal, and the power control state of the sounding reference signal transmission is configured to be the same as the power control state of the PUSCH.

15. The device according to claim 1, wherein The first DCI format is used for power control of sounding reference signal transmission, and the first DCI format indicates at least one of the following: a sounding reference signal request, a transmission power control command, and a sounding reference signal power control state.

16. The device according to claim 15, wherein The first DCI format is used for one or a group of terminal devices; wherein the first RNTI is used for the first DCI format.

17. The device according to claim 1, wherein DCI format 0_1 or DCI format 0_2 or DCI format 1_1 or DCI format 1_2 is used to trigger sounding reference signal transmission.

18. The device according to claim 17, wherein The transmission power control command carried by the DCI is used to trigger the sounding reference signal, and the added field or the reused field in the DCI is used to indicate the sounding reference signal power control state.

19. A device for receiving a sounding reference signal, comprising: a sending unit, configured to send configuration information of a sounding reference signal to a terminal device; The terminal device performs a first uplink transmission and a first downlink transmission with the first transmission reception point, and / or performs a second uplink transmission with the second transmission reception point. transmission; A receiving unit is configured to receive the second uplink transmission sent by the terminal device at least according to a power control state for a sounding reference signal.

20. A communication system comprising: A network device that sends configuration information of a sounding reference signal to a terminal device; The terminal device performs a first uplink transmission and a first downlink transmission with a first transmission reception point, and / or performs a second uplink transmission with a second transmission reception point; A terminal device is configured to send the second uplink transmission at least according to a power control state for a sounding reference signal.

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