CSI report transmission method, reception method, apparatus, device, and medium

Abstract

The embodiments of the present application provide a method, an apparatus, a device, and a medium for transmitting a CSI report, which belong to the field of mobile communication. The method includes a step of transmitting a CSI report, where the CSI report includes CSI corresponding to at least one transmission of at least two transmissions of at least one CSI-RS in one period. The method transmits at least one CSI-RS at least twice in one period, and selects and reports a measurement result of the at least one CSI-RS in one period by a UE, so that the UE can report measurement results of the CSI-RS at different time domain positions in one CSI report and can save signaling overhead in the CSI reporting process.

Description

[Technical Field]

[0001] The present application relates to the field of mobile communications, and in particular to a method, apparatus, device and medium for transmitting and receiving CSI reports. [Background technology]

[0002] Channel State Information (CSI) is obtained by User Equipment (UE) by measuring the Channel State Information Reference Signal (CSI-RS) transmitted from the base station. CSI is used to characterize the channel quality of the downlink channel.

[0003] In a scenario where the UE moves at high speed, a long CSI feedback period will result in poor real-time performance of the CSI due to the high UE speed, leading to large delays and poor CSI accuracy, while a short CSI feedback period will result in large signaling overhead. Summary of the Invention [Problem to be solved by the invention]

[0004] The embodiments of the present application provide a method, an apparatus, a device, and a medium for transmitting and receiving a CSI report, which can ensure the accuracy of CSI feedback in a scenario where a UE moves at high speed and reduce the CSI signaling overhead in the configuration process and reporting process. [Means for solving the problem]

[0005] According to one aspect of the embodiment of the present application, there is provided a method for transmitting a CSI report, comprising: A method for transmitting a CSI report is provided, comprising: transmitting a CSI report, the CSI report including CSI corresponding to at least one transmission of at least two transmissions of at least one CSI-RS in one period.

[0006] According to one aspect of an embodiment of the present application, there is provided a method for receiving a CSI report, the method comprising: A method for receiving a CSI report is provided, comprising: receiving a CSI report, the CSI report including CSI corresponding to at least one transmission of at least two transmissions of at least one CSI-RS in one period.

[0007] According to another aspect of the embodiment of the present application, there is provided a CSI report transmission device, comprising: An apparatus for transmitting a CSI report is provided, the apparatus including: a transmission module for transmitting a CSI report, the CSI report including CSI corresponding to at least one transmission of at least two transmissions of at least one CSI-RS in one period.

[0008] According to another aspect of the embodiment of the present application, there is provided a CSI report transmission device, comprising: An apparatus for transmitting a CSI report is provided, the apparatus including: a receiving module for receiving a CSI report, the CSI report including CSI corresponding to at least one transmission of at least two transmissions of at least one CSI-RS in one period.

[0009] According to another aspect of an embodiment of the present application, there is provided a communication device, comprising: There is provided a communications device including a processor and a memory, wherein a computer program is stored in the memory, and the computer program is loaded and executed by the processor to realize the above-described method for transmitting and / or receiving a CSI report.

[0010] According to another aspect of an embodiment of the present application, there is provided a chip, comprising: A chip is provided that includes programmable logic circuits and / or program instructions, which, when activated, implements the above-described method for transmitting and / or receiving a CSI report.

[0011] According to another aspect of an embodiment of the present application, there is provided a computer-readable storage medium having a computer program stored thereon, the computer program being executed by a processor to realize the above-described method for transmitting and / or receiving a CSI report. [Effects of the Invention]

[0012] The technical solutions according to the embodiments of the present application can achieve the following beneficial effects: By transmitting at least one CSI-RS at least twice in one period and having the UE select and report measurement results of at least one CSI-RS in one period, the UE can report measurement results of CSI-RS at different time-domain positions in one CSI report and can save signaling overhead in the CSI reporting process.

[0013] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. [Brief explanation of the drawings]

[0014] In order to more clearly describe the technical solutions in the embodiments of the present application, the drawings that need to be used in the description of the embodiments are briefly described below, but it should be apparent that the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without any creative efforts.

[0015] [Figure 1] 1 is a schematic diagram of the architecture of a mobile communication system according to an exemplary embodiment; [Figure 2] 1 is a flowchart of a method for transmitting a CSI report according to an exemplary embodiment. [Figure 3] FIG. 1 is a time-frequency resource diagram illustrating repeated transmission of CSI-RS in one period according to an example embodiment. [Figure 4] 1 is a flowchart of a method for transmitting a CSI report according to an exemplary embodiment. [Figure 5] FIG. 10 is a time-frequency resource diagram illustrating repeated transmission of CSI-RS in one period according to another exemplary embodiment. [Figure 6] FIG. 10 is a time-frequency resource diagram illustrating repeated transmission of CSI-RS in one period according to another exemplary embodiment. [Figure 7] 1 is a flowchart of a method for receiving a CSI report according to an exemplary embodiment. [Figure 8] 1 is a flowchart of a method for receiving a CSI report according to an exemplary embodiment. [Figure 9] FIG. 1 is a block diagram of a CSI report transmission device according to an exemplary embodiment. [Figure 10] FIG. 1 is a block diagram of a receiving device for a CSI report according to an exemplary embodiment. [Figure 11] FIG. 1 is a schematic diagram illustrating a communication device according to an exemplary embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0016] Illustrative examples are described in detail herein, examples of which are illustrated in the accompanying drawings. When the following description refers to the drawings, like numerals in different drawings refer to the same or similar elements unless otherwise indicated. The embodiments described in the following illustrative examples do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application as set forth in the appended claims.

[0017] First, we briefly describe some concepts involved in the embodiments of this application. The broadband refers to the entire bandwidth, or the entire bandwidth corresponding to the cell, or the entire bandwidth available to the terminal, or the entire bandwidth used by the terminal, or the entire bandwidth configured for the terminal, for example, the bandwidth corresponding to an activated BWP (bandwidth part). Narrowband refers to dividing the entire bandwidth into multiple subbands. For example, if the bandwidth is 24 to 72 physical resource blocks (PRBs), the subband size is 4 or 8 PRBs. If the bandwidth is 73 to 144 PRBs, the subband size is 8 or 16 PRBs. If the bandwidth is 145 to 275 PRBs, the subband size is 16 or 32 PRBs. Furthermore, the subbands can be divided into multiple frequency domain units or frequency domain basis vectors.

[0018] 1 is a schematic diagram of the architecture of a mobile communication system according to an embodiment of the present application. As shown in FIG. 1, the mobile communication system may include a network device 102, which may be a device that communicates with a terminal 101 (also referred to as a communication terminal, terminal). The network device 102 may provide communication coverage in a specific geographic area and may communicate with the terminal within the coverage area.

[0019] 1 schematically illustrates one network device 102 and two terminals 101. In some embodiments of the present application, the mobile communication system may include multiple network devices 102, and the coverage of each network device 102 may include other numbers of terminals 101. The embodiments of the present application are not limited thereto.

[0020] In an embodiment of the present application, the terminal 101 may be a station (ST) of a WLAN, a mobile phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA) device, a handheld device with wireless communication capabilities, a computing device, or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, a terminal 101 in a next-generation mobile communication system, for example, an NR network, or a terminal 101 in a Public Land Mobile Network (PLMN) network that will evolve in the future.

[0021] In the embodiment of the present application, the terminal 101 may be a device that provides a user with a voice connection and / or a data connection and may be used to connect people, objects, and machines, such as a handheld device with a wireless connection function, an in-vehicle device, etc. The terminal 101 in the embodiment of the present application may be a mobile phone, a tablet computer (Pad), a notebook computer, a handheld computer, a mobile internet device (MID), a wearable device, a virtual reality (VR) device, an augmented reality (AR) device, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical surgery, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, etc. Optionally, the UE may function as a base station. For example, the terminal 101 may function as a scheduling entity that provides sidelink signals between terminals 101 in V2X or D2D, etc. For example, a mobile phone and a car communicate with each other using sidelink signals, and communication between a mobile phone and a smart home device does not need to relay communication signals via a base station.

[0022] In embodiments of the present application, the terminal 101 may be deployed indoors or outdoors, on land, including portable, wearable or vehicle-mounted, on water (such as a ship), or in the air (such as an airplane, balloon, or satellite).

[0023] The terminal 101 according to the embodiments of the present application may also be referred to as a terminal, user equipment (UE), access terminal, vehicle-mounted terminal, industrial control terminal, UE unit, UE station, mobile station, mobile platform, remote station, remote terminal, mobile device, UE terminal, wireless communication device, UE agent, or UE device, etc. The terminal 101 may be fixed or mobile.

[0024] By way of example and not limitation, in the embodiments of the present application, the terminal 101 may be a wearable device. Wearable devices, also known as wearable smart devices, are a collective term for glasses, gloves, watches, clothing, shoes, and other wearable devices that utilize wearable technology to intelligently design and develop everyday clothing. Wearable devices are portable devices that are worn directly on the body or integrated into a user's clothing or accessories. Wearable devices are not simply hardware devices; they achieve powerful functions through software support, data interaction, and cloud interaction. In a broad sense, wearable smart devices include full-featured, large devices such as smart watches and smart glasses that can achieve full or partial functionality independently of a smartphone, and devices that focus only on specific application functions and require collaboration with other devices such as smartphones, such as various types of smart bracelets and smart jewelry used for biometric monitoring.

[0025] The network device 102 in the embodiment of the present application may be a device for communicating with the terminal 101. The network device 102 is also referred to as an access network device or a radio access network device. The network device 102 may be a base station. The network device 102 in the embodiment of the present application may refer to a radio access network (RAN) node (or device) that allows the terminal 101 to access a wireless network. The base station may broadly cover or be substituted with various names, such as NodeB, evolved NodeB (eNB), next generation NodeB (gNB), relay station, access point, transmitting and receiving point (TRP), transmitting point (TP), main station MeNB, secondary station SeNB, multi-standard wireless (MSR) node, home base station, network controller, access node, radio node, access point (AP), transmission node, transceiver node, base band unit (BBU), radio frequency remote unit (RRU), active antenna unit (AAU), remote radio head (RRH), central unit (CU), distributed unit (DU), positioning node, etc. The base station may be a macro base station, a micro base station, a relay node, a donor node, or the like, or a combination thereof. A base station may refer to a communication module, modem, or chip installed within the aforementioned device or equipment.The base station may be a mobile switching center, a device that performs the function of a base station in device-to-device (D2D), vehicle-to-everything (V2X), or machine-to-machine (M2M) communications, network side equipment in a 6G network, a device that performs the function of a base station in future mobile communications, etc. The base station may support networks of the same or different access technologies. The embodiments of the present application do not limit the specific technology and specific device form used by the network device 102.

[0026] A base station may be fixed or mobile. For example, a helicopter or drone may be configured to function as a mobile base station, with one or more cells being movable depending on the location of the mobile base station. In another example, a helicopter or drone may be configured to function as a device that communicates with another base station.

[0027] In some configurations, the network device 102 in the embodiments of the present application may refer to a CU or a DU. Alternatively, the network device 102 may include a CU and a DU. The gNB may include an AAU.

[0028] The network device 102 and the terminal 101 may be deployed indoors or outdoors, on land, including portable or vehicle-mounted, on water, or in the air on aircraft, balloons, and satellites. In the embodiment of the present application, the scenario in which the network device 102 and the terminal 101 are located is not limited.

[0029] By way of example and not limitation, in embodiments of the present application, the network device 102 may have a mobile characteristic, e.g., the network device 102 may be a mobile device. In some embodiments of the present application, the network device 102 may be a satellite or a balloon station. For example, the satellite may be a Low Earth Orbit (LEO) satellite, a Medium Earth Orbit (MEO) satellite, a Geostationary Earth Orbit (GEO) satellite, a High Elliptical Orbit (HEO) satellite, etc. In some embodiments of the present application, the network device 102 may be a base station located on land, water, etc.

[0030] In an embodiment of the present application, the network device 102 can provide a service to a cell, and the terminal 101 can communicate with the network device 102 via transmission resources (e.g., frequency domain resources or spectrum resources) used by the cell. The cell may be a cell corresponding to the network device 102 (e.g., a base station). The cell may be a macro base station or a base station corresponding to a small cell. The small cell here may include a metro cell, a micro cell, a pico cell, a femto cell, etc. These small cells are characterized by narrow coverage and low transmission power, and are suitable for providing high-speed data transmission services.

[0031] 2 shows a flowchart of a method for configuring a CSI report according to an exemplary embodiment of the present application. In this embodiment, the method is applied to a terminal. The method includes step 202. In step 202, a CSI report is transmitted, where the CSI report includes CSI corresponding to at least one transmission of the at least two transmissions of the at least one CSI-RS in one period.

[0032] At least one CSI-RS is transmitted at least twice in one period, and the terminal measures the CSI-RS corresponding to at least one transmission of the at least two transmissions in one period and generates a corresponding CSI report.

[0033] At least one CSI-RS includes a non-zero power (NZP) CSI-RS and / or a zero power (ZP) CSI-RS. The NZP CSI-RS needs to be actually generated and mapped to a resource element (RE). The ZP CSI-RS does not need to be generated and mapped to an RE.

[0034] "At least two transmissions" can be understood as any one of at least two transmissions, at least two CSI resources, and CSI-RS transmitted at different time-domain positions. The CSI-RS transmitted at least twice may be the same CSI-RS, i.e., the CSI-RS transmitted at least twice has the same index. The CSI-RS transmitted at least twice may be different CSI-RS and have different indexes.

[0035] As shown schematically in Fig. 3, the ordinate represents the frequency domain and the abscissa represents the time domain. In the same CSI-RS period, CSI-RS is repeatedly transmitted four times. Fig. 3 shows the CSI-RS transmitted for the first, second, third, and fourth times in CSI-RS period n, as well as the CSI-RS transmitted for the first and second times in CSI-RS period n+1 (the remaining two times are not shown).

[0036] In a CSI-RS period n, the terminal may measure all or part of the CSI-RS, generate CSI corresponding to all or part of the CSI-RS, and transmit a CSI report to the base station. For example, the CSI report may include all of the CSI corresponding to the CSI-RS transmitted four times in the CSI-RS period n. Also, for example, the CSI report may include CSI corresponding to the first CSI-RS transmitted in the CSI-RS period n and the fourth CSI-RS transmitted in the CSI-RS period n.

[0037] In summary, the method provided by this embodiment transmits at least one CSI-RS at least twice in one period, and has the UE select and report measurement results of at least one CSI-RS in one period. This allows the UE to report measurement results of CSI-RS at different time-domain positions in one CSI report, and saves signaling overhead in the CSI reporting process.

[0038] 4 shows a flowchart of a method for transmitting a CSI report according to another exemplary embodiment of the present application. In this embodiment, the method is applied to a terminal as an example. The method includes the following steps: In step 302, CSI-RS configuration information is received to indicate at least one CSI-RS resource.

[0039] The CSI-RS configuration information includes at least one of a measurement configuration of the CSI-RS and a reporting configuration of the CSI corresponding to the CSI-RS.

[0040] In some embodiments, the CSI-RS configuration information includes at least one of the following information: A repetition status corresponding to at least one CSI-RS, the status including on or off. Repeat transmission refers to a mechanism for retransmitting the same CSI-RS at different time domain positions within the same period. Repeat transmission is also called a repeat count. If the state is on, the repeat transmission mechanism is started. If the state is off, the repeat transmission mechanism is stopped. In this embodiment, the case where the state is on will be described as an example.

[0041] The number of times L that at least one CSI-RS is transmitted in one period, where L is an integer greater than 0 or 1. When the state of repeated transmission is off, the number L of transmissions of at least one CSI-RS in one period may be 1. When the state of repeated transmission is on, the number L of transmissions of at least one CSI-RS in one period may be an integer greater than 1, such as 2 or 4.

[0042] · The time interval T between two transmissions of at least one CSI-RS in one period. The time interval T is an integer number of slots and / or an integer number of symbols.

[0043] · Silence pattern of at least one CSI-RS in one period. The silence pattern indicates at which time positions within which CSI-RS periods the CSI-RS is not transmitted.

[0044] In some embodiments, the CSI-RS configuration information includes at least one of the following information: At least one CSI-RS period. The periods of different CSI-RSs may be the same or different, but in this embodiment, a case where the periods of different CSI-RSs are the same will be described as an example.

[0045] · At least one CSI-RS slot offset. In one period, each CSI-RS has its own slot offset. Optionally, the slot offset of each CSI-RS is different. If the repeated transmission state of a certain CSI-RS is on, the slot offset may be represented by the slot offset of the CSI-RS transmitted for the first time.

[0046] Symbol positions occupied by at least one CSI-RS. Frequency domain resource location of at least one CSI-RS. · The number of ports of at least one CSI-RS. · Density of at least one CSI-RS. Quasi Co-Location (QCL) information of at least one CSI-RS, e.g., QCL Type D information. Here, QCL Type D information is used to indicate the spatial reception parameters, known as beams, corresponding to the CSI-RS. The CSI-RS transmitted repeatedly at different time-domain positions within the same period can be transmitted based on the same beam or different beams.

[0047] In step 304, measurement is performed based on at least one CSI-RS resource to obtain CSI.

[0048] The terminal performs measurements on at least one CSI-RS resource based on the at least one CSI-RS resource configured by the CSI-RS configuration information to obtain CSI. Optionally, each CSI-RS period in the CSI-RS configuration information includes at least two CSI-RS resources, and a CSI-RS is transmitted on each CSI-RS resource of the at least two CSI-RS resources.

[0049] The CSI-RS transmitted on the at least two CSI-RS resources may be the same CSI-RS, or the CSI-RS transmitted on the at least two CSI-RS resources may be different CSI-RS.

[0050] The at least one CSI-RS includes an NZP CSI-RS and / or a ZP CSI-RS. The NZP CSI-RS needs to be actually generated and mapped to the RE. The ZP CSI-RS does not need to be actually generated and mapped to the RE.

[0051] Illustratively, there is at least one CSI-RS that is repeatedly transmitted in one period, that is, the number of times that the at least one CSI-RS is transmitted in the one period is greater than one.

[0052] In the example shown in Figure 5, in CSI-RS period n, the number of transmissions L of the CSI-RS with index "#1" is 4, the slot offset of the first CSI-RS #1 is 0, and the time interval between two adjacent transmissions of the same CSI-RS is t1. The four transmissions of the same CSI-RS in one period may correspond to the same beam or different beams.

[0053] For example, all four transmissions are transmitted on beam 1. Also, for example, the four transmissions are transmitted on beam 1, beam 2, beam 3, and beam 4, respectively. Also, for example, the first and third transmissions are transmitted on beam 1, and the second and fourth transmissions are transmitted on beam 2.

[0054] In the example shown in Figure 6, in CSI-RS period n, the number of transmissions L of CSI-RSs with indexes "#1" and "#2" is 2, the slot offset of the first CSI-RS#1 is 0, the slot offset of the second CSI-RS#1 is greater than 0, and the time interval between two adjacent transmissions of the same CSI-RS is t2.

[0055] Similarly, the four transmissions of two CSI-RS in one period may correspond to the same beam or to different beams.

[0056] For example, all four transmissions are sent on beam 1. Also, for example, four transmissions are sent on beam 1, beam 2, beam 3, and beam 4, respectively. Also, for example, the first and third transmissions are sent on beam 1, and the second and fourth transmissions are sent on beam 2.

[0057] In step 306, a CSI report is transmitted, where the CSI report includes CSI corresponding to at least one transmission of the at least two transmissions of the at least one CSI-RS in one period.

[0058] "At least two transmissions" can be understood as any one of at least two transmissions, at least two CSI resources, and CSI-RS transmitted at different time-domain positions. The CSI-RS transmitted at least twice may be the same CSI-RS, i.e., the CSI-RS transmitted at least twice has the same index. The CSI-RS transmitted at least twice may be different CSI-RS and have different indexes.

[0059] The terminal measures all or part of the CSI-RS in one period, generates CSI corresponding to all or part of the CSI-RS in one period, and transmits a CSI report to the base station. For example, the CSI report includes all of the CSI corresponding to the CSI-RS transmitted four times in a CSI-RS period n. Also, for example, the CSI report includes CSI corresponding to the CSI-RS transmitted third and fourth times in a CSI-RS period n. The reporting period of the CSI report is equal to or greater than the period of the CSI-RS.

[0060] In some embodiments, the CSI report includes CSI corresponding to at least two transmissions of at least one CSI-RS in one period.

[0061] For example, in Figure 5, the CSI report includes all of the CSI corresponding to CSI-RS#1 transmitted four times in CSI-RS period n, or the CSI report includes CSI corresponding to CSI-RS#1 transmitted for the second and fourth times in CSI-RS period n.

[0062] 6, for example, the CSI report includes CSI corresponding to CSI-RS#1 transmitted twice in CSI-RS period n and CSI corresponding to CSI-RS#2 transmitted twice. Alternatively, the CSI report includes CSI corresponding to CSI-RS#1 transmitted for the second time in CSI-RS period n and CSI corresponding to CSI-RS#2 transmitted for the second time.

[0063] In some embodiments, the CSI-RS report comprises: Indicate an index of the at least one CSI-RS and a sequence number corresponding to at least one transmission of the L transmissions of the index of the at least one CSI-RS in one period.

[0064] In some embodiments, the CSI-RS report includes at least one of the amplitude and phase of at least one CSI-RS.

[0065] In some embodiments, the amplitudes include amplitudes corresponding to at least one transmission of the L transmissions of the at least one CSI-RS in one period. Illustratively, the amplitudes include at least one of a wideband amplitude and a narrowband amplitude.

[0066] In some embodiments, the phases include phases that respectively correspond to at least one transmission of the L transmissions of the at least one CSI-RS in one period. Illustratively, the phases include at least one of a wideband phase and a narrowband phase.

[0067] For example, in Figure 5, the CSI report includes all of the CSI corresponding to CSI-RS#1 transmitted four times in CSI-RS period n. Table 1 shows the contents of the CSI report. Table 1 JPEG0007764622000001.jpg45170

[0068] For example, in Figure 5, the CSI report includes CSI corresponding to CSI-RS#1 transmitted for the second and fourth times in CSI-RS period n. Table 2 shows the contents of the CSI report. Table 2 JPEG0007764622000002.jpg27170

[0069] For example, in Figure 6, the CSI report includes all of the CSI corresponding to the CSI-RS transmitted four times in a CSI-RS period n. Table 3 shows the contents of the CSI report. Table 3 JPEG0007764622000003.jpg45170

[0070] For example, in Figure 6, the CSI report includes CSI corresponding to CSI-RS#1 transmitted for the second time in CSI-RS period n and CSI-RS#2 transmitted for the second time. Table 4 shows the contents of the CSI report. Table 4 JPEG0007764622000004.jpg27170

[0071] As can be seen from the above table, a terminal can measure CSI-RS on multiple CSI-RS resources in one period. For example, by measuring the same CSI-RS transmitted by one beam at four different time-domain positions and reporting corresponding CSI reports, a base station can obtain CSI at multiple different time-domain positions from one CSI report. This allows the base station to obtain accurate CSI in relatively real time, even in a scenario where the UE is moving at high speed. In summary, the method provided by this embodiment transmits at least one CSI-RS at least twice in one period and has the UE select and report measurement results of at least one CSI-RS in one period. This allows the UE to report measurement results of CSI-RS at different time-domain positions in one CSI report, while saving signaling overhead in the CSI reporting process.

[0072] On the other hand, since the base station can configure the same CSI-RS configuration information to transmit at least one CSI-RS at least twice in one period, signaling overhead in the CSI configuration process can also be saved.

[0073] 7 shows a flowchart of a method for configuring a CSI report according to an exemplary embodiment of the present application. In this embodiment, the method is applied to an access network device (e.g., a base station). The method includes step 402.

[0074] In step 402, a CSI report is received, the CSI report including CSI corresponding to at least one transmission of at least two transmissions of at least one CSI-RS in one period.

[0075] The access network device receives a CSI report transmitted from a terminal, and at least one CSI-RS is transmitted at least twice in one period. The terminal measures the CSI-RS corresponding to at least one transmission of the at least two transmissions in one period and generates a corresponding CSI report.

[0076] The at least one CSI-RS includes an NZP CSI-RS and / or a ZP CSI-RS. The NZP CSI-RS needs to be actually generated and mapped to the RE. The ZP CSI-RS does not need to be actually generated and mapped to the RE.

[0077] "At least two transmissions" can be understood as at least one of at least two transmissions, at least two CSI resources, and CSI-RS transmitted at different time-domain positions. The CSI-RS transmitted at least twice may be the same CSI-RS, i.e., the CSI-RS transmitted at least twice has the same index. The CSI-RS transmitted at least twice may be different CSI-RS and have different indexes.

[0078] In summary, the method provided by this embodiment transmits at least one CSI-RS at least twice in one period, and has the UE select and report measurement results of at least one CSI-RS in one period. This allows the UE to report measurement results of CSI-RS at different time-domain positions in one CSI report, and saves signaling overhead in the CSI reporting process.

[0079] 8 shows a flowchart of a method for receiving a CSI report according to another exemplary embodiment of the present application. In this embodiment, the method is applied to an access network device (e.g., a base station) as an example. The method includes the following steps: In step 602, send CSI-RS configuration information to indicate at least one CSI-RS resource.

[0080] The CSI-RS configuration information includes at least one of a measurement configuration of the CSI-RS and a reporting configuration of the CSI corresponding to the CSI-RS.

[0081] In some embodiments, the CSI-RS configuration information includes at least one of the following information: A repetition status corresponding to at least one CSI-RS, the status including on or off. Repeat transmission refers to a mechanism for retransmitting the same CSI-RS at different time domain positions within the same period. Repeat transmission is also called a repeat count. If the state is on, the repeat transmission mechanism is started. If the state is off, the repeat transmission mechanism is stopped. In this embodiment, the case where the state is on will be described as an example.

[0082] The number of times L that at least one CSI-RS is transmitted in one period, where L is an integer greater than 0 or 1. When the state of repeated transmission is off, the number L of transmissions of at least one CSI-RS in one period may be 1. When the state of repeated transmission is on, the number L of transmissions of at least one CSI-RS in one period may be an integer greater than 1, such as 2 or 4.

[0083] · The time interval T between two transmissions of at least one CSI-RS in one period. The time interval T is an integer number of slots and / or an integer number of symbols.

[0084] · Silence pattern of at least one CSI-RS in one period. The silence pattern is used to indicate that no CSI-RS is transmitted at a certain time position within a certain CSI-RS period.

[0085] In some embodiments, the CSI-RS configuration information further includes at least one of the following information: At least one CSI-RS period. The periods of different CSI-RSs may be the same or different, but in this embodiment, a case where the periods of different CSI-RSs are the same will be described as an example.

[0086] · At least one CSI-RS slot offset. In one period, each CSI-RS has its own slot offset. Optionally, the slot offset of each CSI-RS is different. If the repeated transmission state of a certain CSI-RS is on, the slot offset may be represented by the slot offset of the CSI-RS transmitted for the first time.

[0087] Symbol positions occupied by at least one CSI-RS. Frequency domain resource location of at least one CSI-RS. · The number of ports of at least one CSI-RS. · Density of at least one CSI-RS. QCL information of at least one CSI-RS, e.g., QCL Type D information. Here, QCL Type D information is used to indicate spatial reception parameters, known as beams, corresponding to the CSI-RS. CSI-RS transmitted repeatedly at different time-domain positions within the same period may be transmitted based on the same beam or different beams.

[0088] In step 604, transmit the CSI-RS based on the at least one CSI-RS resource.

[0089] The access network device transmits the CSI-RS on at least one CSI-RS resource based on the at least one CSI-RS resource configured by the CSI-RS configuration information. Optionally, each CSI-RS period in the CSI-RS configuration information includes at least two CSI-RS resources, and a CSI-RS is transmitted on each CSI-RS resource of the at least two CSI-RS resources.

[0090] The CSI-RS transmitted on the at least two CSI-RS resources may be the same CSI-RS, or the CSI-RS transmitted on the at least two CSI-RS resources may be different CSI-RS.

[0091] The at least one CSI-RS includes an NZP CSI-RS and / or a ZP CSI-RS. The NZP CSI-RS needs to be actually generated and mapped to the RE. The ZP CSI-RS does not need to be actually generated and mapped to the RE.

[0092] Illustratively, there is at least one CSI-RS that is repeatedly transmitted in one period, that is, the number of times that the at least one CSI-RS is transmitted in the one period is greater than one.

[0093] In the example shown in Figure 5, in CSI-RS period n, the number of transmissions L of the CSI-RS with index "#1" is 4, the slot offset of the first CSI-RS #1 is 0, and the time interval between two adjacent transmissions of the same CSI-RS is t1. The four transmissions of the same CSI-RS in one period may correspond to the same beam or different beams.

[0094] For example, all four transmissions are transmitted on beam 1. Also, for example, four transmissions are transmitted on beam 1, beam 2, beam 3, and beam 4, respectively. Also, for example, the first and third transmissions are transmitted on beam 1, and the second and fourth transmissions are transmitted on beam 2.

[0095] In the example shown in Figure 6, in a CSI-RS period n, the number of transmissions L of CSI-RSs with indexes "#1" and "#2" is 2, the slot offset of the first CSI-RS#1 is 0, the slot offset of the second CSI-RS#1 is greater than 0, and the time interval between two adjacent transmissions of the same CSI-RS is t2.

[0096] Similarly, the four transmissions of two CSI-RS in one period may correspond to the same beam or to different beams.

[0097] For example, all four transmissions are transmitted on beam 1. Also, for example, four transmissions are transmitted on beam 1, beam 2, beam 3, and beam 4, respectively. Also, for example, the first and third transmissions are transmitted on beam 1, and the second and fourth transmissions are transmitted on beam 2.

[0098] In step 606, a CSI report including CSI corresponding to at least one transmission of the at least two transmissions of the at least one CSI-RS in one period is received.

[0099] "At least two transmissions" can be understood as any one of at least two transmissions, at least two CSI resources, and CSI-RS transmitted at different time-domain positions. The CSI-RS transmitted at least twice may be the same CSI-RS, i.e., the CSI-RS transmitted at least twice has the same index. The CSI-RS transmitted at least twice may be different CSI-RS and have different indexes.

[0100] The terminal measures all or part of the CSI-RS in one period, generates CSI corresponding to all or part of the CSI-RS in one period, and transmits a CSI report to the base station. For example, the CSI report includes all of the CSI corresponding to the CSI-RS transmitted four times in a CSI-RS period n. Also, for example, the CSI report includes CSI corresponding to the CSI-RS transmitted third and fourth times in a CSI-RS period n. The reporting period of the CSI report is equal to or greater than the period of the CSI-RS.

[0101] In some embodiments, the CSI report includes CSI corresponding to at least two transmissions of at least one CSI-RS in one period.

[0102] For example, in Figure 5, the CSI report includes all of the CSI corresponding to CSI-RS#1 transmitted four times in CSI-RS period n, or the CSI report includes CSI corresponding to CSI-RS#1 transmitted for the second and fourth times in CSI-RS period n.

[0103] 6, for example, the CSI report includes CSI corresponding to CSI-RS#1 transmitted twice in CSI-RS period n and CSI corresponding to CSI-RS#2 transmitted twice. Alternatively, the CSI report includes CSI corresponding to CSI-RS#1 transmitted for the second time in CSI-RS period n and CSI corresponding to CSI-RS#2 transmitted for the second time.

[0104] In some embodiments, a CSI-RS report includes: It refers to the index of at least one CSI-RS and a sequence number corresponding to at least one transmission among the L transmissions of the index of at least one CSI-RS in one period.

[0105] In some embodiments, the CSI-RS report includes at least one of the amplitude and phase of at least one CSI-RS.

[0106] In some embodiments, the amplitudes include amplitudes corresponding to at least one transmission of the L transmissions of the at least one CSI-RS in one period. Illustratively, the amplitudes include at least one of a wideband amplitude and a narrowband amplitude.

[0107] In some embodiments, the phases include phases that respectively correspond to at least one transmission of the L transmissions of the at least one CSI-RS in one period. Illustratively, the phases include at least one of a wideband phase and a narrowband phase.

[0108] For example, a terminal can measure CSI-RS in multiple CSI-RS resources in one period. For example, by measuring the same CSI-RS transmitted by one beam at four different time-domain positions and reporting corresponding CSI reports, a base station can obtain CSI at multiple different time-domain positions from one CSI report, and can obtain relatively real-time and accurate CSI even in a scenario where a UE is moving at high speed.

[0109] In summary, the method provided by this embodiment transmits at least one CSI-RS at least twice in one period, and has the UE select and report measurement results of at least one CSI-RS in one period. This allows the UE to report measurement results of CSI-RS at different time-domain positions in one CSI report, and saves signaling overhead in the CSI reporting process.

[0110] On the other hand, the base station can configure at least one CSI-RS to be transmitted at least twice in one period using the same CSI-RS configuration information, thereby saving signaling overhead in the CSI configuration process.

[0111] 9 is a block diagram of a CSI report transmitting device according to an exemplary embodiment of the present application. The method includes a transmitting module 920 for transmitting a CSI report including CSI corresponding to at least one transmission of the at least two transmissions of the at least one CSI-RS in one period.

[0112] In one possible design of this embodiment, the device comprises: The device further includes a receiving module 940 for receiving CSI-RS configuration information for indicating at least one CSI-RS resource. The CSI report includes CSI obtained by measuring based on the at least one CSI-RS resource.

[0113] In one possible design of this embodiment, the CSI-RS configuration information includes: a state of repeated transmission corresponding to the at least one CSI-RS, including on or off; the number of times L (where L is an integer greater than 1) that the at least one CSI-RS is transmitted in the one period; a time interval T between two transmissions of the at least one CSI-RS in the one period; and a silence pattern of the at least one CSI-RS in the one period.

[0114] In one possible design of this embodiment, the CSI-RS configuration information includes: a periodicity of the at least one CSI-RS; a slot offset of the at least one CSI-RS; a symbol position occupied by the at least one CSI-RS; a frequency domain resource location of the at least one CSI-RS; the number of ports of the at least one CSI-RS; the density of the at least one CSI-RS; and Further included is at least one of the QCL information, for example QCL Type D information, of said at least one CSI-RS, known as beam information.

[0115] In one possible design of this embodiment, the CSI-RS report includes: Indicating an index of the at least one CSI-RS and a sequence number corresponding to at least one transmission among the L transmissions of the index of the at least one CSI-RS in the one period.

[0116] In one possible design of this embodiment, the CSI-RS report includes: Indicating at least one of an amplitude and a phase of the at least one CSI-RS.

[0117] In one possible design of this embodiment, the amplitudes include at least one of a broadband amplitude and a narrowband amplitude.

[0118] In one possible design of this embodiment, the amplitudes include amplitudes corresponding respectively to at least one transmission of the L transmissions of the at least one CSI-RS in the one period.

[0119] In one possible design of this embodiment, the phases include at least one of a wideband phase and a narrowband phase.

[0120] In one possible design of this embodiment, the phases include phases corresponding respectively to at least one transmission of the L transmissions of the at least one CSI-RS in the one period.

[0121] 10 is a block diagram of a receiving device for a CSI report provided by an exemplary embodiment of the present application. The system includes a receiving module 1020 for receiving a CSI report including CSI corresponding to at least one transmission of the at least two transmissions of the at least one CSI-RS in one period.

[0122] In one possible design of this embodiment, the device comprises: The device further includes a transmitting module 1040 for transmitting CSI-RS configuration information for indicating at least one CSI-RS resource. The CSI report includes CSI obtained by measuring based on the at least one CSI-RS resource.

[0123] In one possible design of this embodiment, the CSI-RS configuration information includes: a state of repeated transmission corresponding to the at least one CSI-RS, including on or off; the number of times L (where L is an integer greater than 1) that the at least one CSI-RS is transmitted in the one period; a time interval T between two transmissions of the at least one CSI-RS in the one period; and a silence pattern of the at least one CSI-RS in the one period.

[0124] In one possible design of this embodiment, the CSI-RS configuration information includes: a periodicity of the at least one CSI-RS; a slot offset of the at least one CSI-RS; a symbol position occupied by the at least one CSI-RS; a frequency domain resource location of the at least one CSI-RS; the number of ports of the at least one CSI-RS; the density of the at least one CSI-RS; and and further including at least one of QCL information, e.g., QCL Type D information, of the at least one CSI-RS, known as beam information.

[0125] In one possible design of this embodiment, the CSI-RS report includes: Indicating an index of the at least one CSI-RS and a sequence number corresponding to at least one transmission among the L transmissions of the index of the at least one CSI-RS in the one period.

[0126] In one possible design of this embodiment, the CSI-RS report includes: Indicating at least one of an amplitude and a phase of the at least one CSI-RS.

[0127] In one possible design of this embodiment, the amplitudes include at least one of a broadband amplitude and a narrowband amplitude.

[0128] In one possible design of this embodiment, the amplitudes include amplitudes corresponding respectively to at least one transmission of the L transmissions of the at least one CSI-RS in the one period.

[0129] In one possible design of this embodiment, the phases include at least one of a wideband phase and a narrowband phase.

[0130] In one possible design of this embodiment, the phases include phases corresponding respectively to at least one transmission of the L transmissions of the at least one CSI-RS in the one period.

[0131] 11 shows a schematic block diagram of a communication device (UE or network device) according to an exemplary embodiment of the present application. The communication device includes a processor 1101, a receiver 1102, a transmitter 1103, a memory 1104, and a bus 1105.

[0132] The processor 1101 includes one or more processing cores, and the processor 1101 executes software programs and modules to perform various functional applications and information processing.

[0133] The receiver 1102 and the transmitter 1103 can be implemented as one communication component, which can be one communication chip. The memory 1104 is connected to the processor 1101 via a bus 1105 . The memory 1104 is capable of storing at least one instruction, and the processor 1101 executes the at least one instruction to implement each step in the above method embodiments.

[0134] Additionally, the memory 1104 may be implemented by any type of volatile or non-volatile storage device or combination thereof, including, but not limited to, a magnetic or optical disk, an electrically erasable programmable read only memory (EEPROM), an erasable programmable read only memory (EPROM), a static random-access memory (SRAM), a read only memory (ROM), a magnetic memory, a flash memory, or a programmable read only memory (PROM).

[0135] In an exemplary embodiment, a non-transitory computer-readable storage medium containing instructions, such as a memory containing instructions, is further provided, and the instructions are executed by a processor of the communication device to complete the coverage enhancement level determination method. For example, the non-transitory computer-readable storage medium may be a ROM, a Random-Access Memory (RAM), a Compact Disc Read Only Memory (CD-ROM), a magnetic tape, a floppy, an optical data storage device, etc.

[0136] A non-transitory computer-readable storage medium, wherein instructions in the non-transitory computer storage medium, when executed by a processor of a communications device, enable the communications device to perform the above-described method for transmitting or receiving a CSI report.

[0137] In an exemplary embodiment of the present application, there is further provided a network device, the network device including: a processor; and a transceiver connected to the processor, the processor being configured to load and execute executable instructions to realize the method for transmitting or receiving a CSI report according to each of the method embodiments described above.

[0138] In an exemplary embodiment of the present application, a chip is further provided, the chip including a programmable logic circuit and / or program instructions, which, when operated, realizes the method for transmitting or receiving a CSI report according to each of the method embodiments described above.

[0139] In an exemplary embodiment of the present application, a computer-readable storage medium is further provided, wherein at least one instruction, at least one program, code set, or instruction set is stored in the computer-readable storage medium, and the at least one instruction, the at least one program, the code set, or the instruction set is loaded and executed by a processor to realize the method for transmitting or receiving a CSI report according to each of the embodiments of the above methods.

[0140] Furthermore, it should be understood that "plurality" as used in this disclosure refers to two or more. "And / or" represents a relationship between related objects, for example, A and / or B represents three possible relationships: A exists alone, A and B exist together, or B exists alone. The character " / " typically represents an "or" relationship between related objects.

[0141] Other embodiments of the present disclosure will be readily apparent to those skilled in the art from consideration of this specification and practice of the present disclosure. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include well-known common knowledge or customary technical means in the art that are not disclosed in the present disclosure. The specification and examples are considered to be exemplary only, with the true scope and spirit of the present disclosure being determined by the following claims.

[0142] It should be understood that the present disclosure is not limited to the exact configuration previously described above and illustrated in the drawings, and that various modifications and changes can be made without departing from the scope of the present disclosure, which is limited only by the appended claims.

Claims

1. 1. A method for transmitting channel state information (CSI) reports, comprising: a step of transmitting a CSI report by a terminal, the CSI report including CSI corresponding to at least one transmission of at least two channel state information reference signal (CSI-RS) transmissions in one period, the at least two CSI-RS transmissions corresponding to at least one CSI-RS; The method further includes receiving, by the terminal, CSI-RS configuration information for indicating at least one CSI-RS resource; the CSI report includes CSI obtained by measuring based on the at least one CSI-RS resource; A method for transmitting a CSI report, comprising:

2. The CSI-RS configuration information includes: a repeat transmission state corresponding to the at least one CSI-RS, including on or off; the number of times L (where L is a positive integer) that the at least one CSI-RS is transmitted in the one period; a time interval T between two transmissions of the at least one CSI-RS in the one period; a silence pattern of the at least one CSI-RS in the one period; a period of the at least one CSI-RS; a slot offset of the at least one CSI-RS; a symbol position occupied by the at least one CSI-RS; a frequency domain resource location of the at least one CSI-RS; the number of ports of the at least one CSI-RS; the density of the at least one CSI-RS; and quasi-co-location (QCL) information of the at least one CSI-RS; The method of claim 1, wherein the CSI report is transmitted.

3. The CSI report: an index of the at least one CSI-RS and a sequence number corresponding to at least one transmission among L transmissions of the index of the at least one CSI-RS in the one period; and at least one of an amplitude or a phase of the at least one CSI-RS. The method of claim 1, wherein the CSI report is transmitted.

4. the amplitude comprises at least one of a broadband amplitude or a narrowband amplitude; the amplitudes include amplitudes corresponding to at least one transmission among L transmissions of the at least one CSI-RS in the one period; The method of claim 3, wherein the CSI report is transmitted.

5. the phase comprises at least one of a broadband phase or a narrowband phase; the phases include phases corresponding to at least one transmission among L transmissions of the at least one CSI-RS in the one period; The method of claim 3, wherein the CSI report is transmitted.

6. 1. A method for receiving channel state information (CSI) reports, comprising: receiving, by the network device, a CSI report, the CSI report including CSI corresponding to at least one transmission of at least two channel state information reference signal (CSI-RS) transmissions in one period, the at least two CSI-RS transmissions corresponding to the at least one CSI-RS; The network device transmits CSI-RS configuration information to indicate at least one CSI-RS resource; the CSI report includes CSI obtained by measuring based on the at least one CSI-RS resource; 10. A method for receiving a CSI report, comprising:

7. The CSI-RS configuration information includes: a repeat transmission state corresponding to the at least one CSI-RS, including on or off; the number of times L (where L is a positive integer) that the at least one CSI-RS is transmitted in the one period; a time interval T between two transmissions of the at least one CSI-RS in the one period; a silence pattern of the at least one CSI-RS in the one period; a period of the at least one CSI-RS; a slot offset of the at least one CSI-RS; a symbol position occupied by the at least one CSI-RS; a frequency domain resource location of the at least one CSI-RS; the number of ports of the at least one CSI-RS; the density of the at least one CSI-RS; and quasi-co-location (QCL) information of the at least one CSI-RS; The method of claim 6, wherein the method comprises:

8. The CSI report: an index of the at least one CSI-RS and a sequence number corresponding to at least one transmission among L transmissions of the index of the at least one CSI-RS in the one period; and at least one of an amplitude or a phase of the at least one CSI-RS. The method of claim 6, wherein the method comprises:

9. the amplitude comprises at least one of a broadband amplitude or a narrowband amplitude; the amplitudes include amplitudes corresponding to at least one transmission among L transmissions of the at least one CSI-RS in the one period; The method of claim 8, wherein the method comprises:

10. the phase comprises at least one of a broadband phase or a narrowband phase; the phases include phases corresponding to at least one transmission among L transmissions of the at least one CSI-RS in the one period; The method of claim 8, wherein the method comprises:

11. a terminal including a processor and a memory, the memory storing a computer program; the processor is configured to transmit a CSI report, the CSI report including CSI corresponding to at least one transmission of at least two channel state information reference signal (CSI-RS) transmissions in a period, the at least two CSI-RS transmissions corresponding to at least one CSI-RS; the processor is configured to receive CSI-RS configuration information for indicating at least one CSI-RS resource; the CSI report includes CSI obtained by measuring based on the at least one CSI-RS resource; A terminal characterized by:

12. The CSI-RS configuration information includes: a repeat transmission state corresponding to the at least one CSI-RS, including on or off; the number of times L (where L is a positive integer) that the at least one CSI-RS is transmitted in the one period; a time interval T between two transmissions of the at least one CSI-RS in the one period; a silence pattern of the at least one CSI-RS in the one period; a period of the at least one CSI-RS; a slot offset of the at least one CSI-RS; a symbol position occupied by the at least one CSI-RS; a frequency domain resource location of the at least one CSI-RS; the number of ports of the at least one CSI-RS; the density of the at least one CSI-RS; and quasi-co-location (QCL) information of the at least one CSI-RS; 12. The terminal according to claim 11 .

13. The CSI report: an index of the at least one CSI-RS and a sequence number corresponding to at least one transmission among L transmissions of the index of the at least one CSI-RS in the one period; and at least one of an amplitude or a phase of the at least one CSI-RS.

12. The terminal according to claim 11 .

14. the amplitude comprises at least one of a broadband amplitude or a narrowband amplitude, or the phase comprises at least one of a broadband phase or a narrowband phase; the amplitudes include amplitudes corresponding to at least one transmission among L transmissions of the at least one CSI-RS in the one period, or the phases include phases corresponding to at least one transmission among L transmissions of the at least one CSI-RS in the one period; 14. The terminal according to claim 13,

15. A network device comprising: a processor and a memory, the memory storing a computer program, the processor configured to execute the method for receiving CSI reports according to claim 6.

16. A computer-readable storage medium having a computer program stored thereon, the computer program being executed by a processor to implement the method for transmitting channel state information (CSI) reports according to any one of claims 1 to 5. A computer-readable storage medium comprising:

17. A computer-readable storage medium having a computer program stored thereon, the computer program being executed by a processor to implement the method for receiving CSI reports according to any one of claims 6 to 10. A computer-readable storage medium comprising:

Images