Information reporting method and apparatus, device, medium, and product

Abstract

The present application relates to the field of communications, and discloses an information reporting method and apparatus, a device, a medium, and a product. The method comprises: reporting first information to a network device, the first information being used for indicating the number of antenna port groups using independent beams and / or independent intra-group phases among downlink antenna ports configured by the network device; and on the basis of the first information, reporting to the network device channel state information (CSI) corresponding to the antenna port groups; alternatively, reporting first information to the network device, the first information being used for indicating whether a plurality of antenna port groups configured by the network device correspond to the same beam and / or the same intra-group phase; and on the basis of the first information, reporting to the network device CSI corresponding to the plurality of antenna port groups. The method provided in the present application helps improve the accuracy of feedback, and owing to the improvement in the accuracy of feedback, high signaling overhead caused by incorrect feedback can be further reduced.

Description

Information reporting methods, devices, equipment, media and products Technical Field

[0001] This application relates to the field of communications, and in particular to an information reporting method, apparatus, device, medium, and product. Background Technology

[0002] As the number of antennas increases, the proportion of near-field channels in communication scenarios rises. Due to the non-stationary nature of near-field channels, codebooks and CSI (Channel State Information) feedback methods based on far-field channel design are not suitable for near-field channels. For example, for far-field channels, different antenna ports on the same antenna panel typically use the same beam and / or polarization phase; however, for near-field channels, antenna ports that are far apart on the same antenna panel correspond to different reflectors. If the same beam and / or polarization phase are still used, it will lead to a decrease in transmission performance.

[0003] Since network devices often struggle to determine whether the current channel is a near-field or far-field channel—meaning related technologies struggle to ascertain whether different antenna ports on the same antenna panel can use the same beam and / or polarization phase—designing an information reporting method that enables network devices to determine the beam and / or polarization phase used by different antenna ports is a problem that needs to be solved.

[0004] Summary of the Invention

[0005] This application provides an information reporting method, apparatus, device, medium, and product, the technical solution of which is as follows:

[0006] According to one aspect of this application, an information reporting method is provided, the method being executed by a terminal device, the method comprising:

[0007] The system reports first information to the network device, the first information indicating the number of antenna port groups in the downlink antenna ports configured by the network device that use independent beams and / or independent intra-group phases; based on the first information, the system reports CSI information corresponding to the antenna port groups to the network device; or, the system reports first information to the network device, the first information indicating whether the multiple antenna port groups configured by the network device correspond to the same beam and / or the same intra-group phase; based on the first information, the system reports CSI information corresponding to the multiple antenna port groups to the network device.

[0008] According to one aspect of this application, an information reporting method is provided, the method being executed by a terminal device, the method comprising:

[0009] The system receives first information reported by a terminal device, the first information indicating the number of antenna port groups in the downlink antenna ports configured by the network device that use independent beams and / or independent intra-group phases; based on the first information, the system receives CSI information corresponding to the antenna port groups reported by the terminal device; or, the system receives first information reported by the terminal device, the first information indicating whether the multiple antenna port groups configured by the network device correspond to the same beam and / or the same intra-group phase; based on the first information, the system receives CSI information corresponding to the multiple antenna port groups reported by the terminal device.

[0010] According to one aspect of this application, an information reporting device is provided, the device comprising:

[0011] The reporting module is configured to report first information to the network device, the first information indicating the number of antenna port groups in the downlink antenna ports configured by the network device that use independent beams and / or independent intra-group phases; the reporting module is further configured to report Channel State Information (CSI) corresponding to the antenna port groups to the network device based on the first information; or, the reporting module is further configured to report first information to the network device, the first information indicating whether the multiple antenna port groups configured by the network device correspond to the same beam and / or the same intra-group phase; the reporting module is further configured to report CSI information corresponding to the multiple antenna port groups to the network device based on the first information.

[0012] According to one aspect of this application, an information reporting device is provided, the device comprising:

[0013] The receiving module is configured to receive first information reported by the terminal device, the first information indicating the number of antenna port groups in the downlink antenna ports configured by the network device that use independent beams and / or independent intra-group phases; the receiving module is further configured to receive CSI information corresponding to the antenna port groups reported by the terminal device based on the first information; or, the receiving module is further configured to receive the first information reported by the terminal device, the first information indicating whether the multiple antenna port groups configured by the network device correspond to the same beam and / or the same intra-group phase; the receiving module is further configured to receive CSI information corresponding to the multiple antenna port groups reported by the terminal device based on the first information.

[0014] According to one aspect of this application, a terminal device is provided, the terminal device comprising:

[0015] A processor; a transceiver connected to the processor; a memory for storing executable instructions of the processor; wherein the processor is configured to load and execute the executable instructions to implement an information reporting method.

[0016] According to one aspect of this application, a network device is provided, the network device comprising:

[0017] A processor; a transceiver connected to the processor; a memory for storing executable instructions of the processor; wherein the processor is configured to load and execute the executable instructions to implement an information reporting method.

[0018] According to one aspect of this application, a computer-readable storage medium is provided, wherein at least one program is stored in the computer-readable storage medium, the at least one program being loaded and executed by a processor to implement an information reporting method.

[0019] According to one aspect of this application, a chip is provided, the chip including programmable logic circuitry and / or program instructions, which, when the chip is running on a terminal device or network device, is used to implement the above-described information reporting method.

[0020] According to one aspect of this application, a computer program product is provided, the computer program product including computer instructions stored in a computer-readable storage medium, a processor retrieving the computer instructions from the computer-readable storage medium, and the processor executing the computer instructions to implement an information reporting method.

[0021] The technical solutions provided in this application have at least the following beneficial effects:

[0022] The methods provided in this application illustrate two information reporting approaches. Approach one involves the terminal device determining the number of antenna port groups using independent beams and / or independent intra-group phases. This means the terminal device recommends the antenna port group allocation. Since the terminal device is the measurer of the downlink channel, it has a clearer understanding of downlink channel information. By having the terminal device determine and use the first information to recommend the number of antenna port groups using independent beams and / or independent intra-group phases, the allocation of antenna port groups determined by the network device based on the first information better matches the downlink channel state, improving feedback accuracy. Approach two involves the network device pre-configuring multiple antenna port groups. The terminal device is responsible for determining whether these antenna port groups use the same beam and / or the same intra-group phase. This also allows the terminal device to determine whether to use the same beam and / or the same intra-group phase based on the downlink channel state, further improving feedback accuracy. Furthermore, the improved feedback accuracy reduces the high signaling overhead caused by erroneous feedback (e.g., in scenarios where only the same beam is needed, erroneous feedback uses independent beams, leading to increased CSI information). Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 shows a schematic diagram of a beam group pattern in the related technology;

[0025] Figure 2 shows a schematic diagram of a mobile communication system provided in an exemplary embodiment of this application;

[0026] Figure 3 shows a flowchart of an information reporting method provided in an exemplary embodiment of this application;

[0027] Figure 4 shows a flowchart of an information reporting method provided in an exemplary embodiment of this application;

[0028] Figure 5 shows an overall flowchart of an information reporting method provided in an exemplary embodiment of this application;

[0029] Figure 6 shows a schematic diagram of an information reporting method provided in an exemplary embodiment of this application;

[0030] Figure 7 shows an overall flowchart of an information reporting method provided in an exemplary embodiment of this application;

[0031] Figure 8 shows a structural block diagram of an information reporting device provided in an exemplary embodiment of this application;

[0032] Figure 9 shows a structural block diagram of an information reporting device provided in an exemplary embodiment of this application;

[0033] Figure 10 shows a schematic diagram of the structure of a terminal device provided in an exemplary embodiment of this application;

[0034] Figure 11 shows a schematic diagram of the structure of a network device provided in an exemplary embodiment of this application. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be further described in detail below with reference to the accompanying drawings. Exemplary embodiments will be described in detail here, examples of which are illustrated in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0036] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The singular forms “a,” “the,” and “the” used in this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items. It should be understood that although the terms first, second, third, etc., may be used in this application to describe various information, such information should not be limited to these terms. These terms are used only to distinguish information of the same type from one another. For example, first information may also be referred to as second information without departing from the scope of this application, and similarly, second information may also be referred to as first information. Depending on the context, the word “if,” as used herein, can be interpreted as “when,” “in response to a determination,” or “when…”.

[0037] The technical solutions described in some embodiments of this application can be applied to various communication systems, such as: Global System for Mobile Communication (GSM) system, Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, Advanced Long Term Evolution (LTE-A) system, New Radio (NR) system, evolution of NR system, LTE-based access to unlicensed spectrum (LTE-U) system, NR-based access to unlicensed spectrum (NR-U) system, Non-Terrestrial Networks (NTN) system, Universal Mobile Telecommunication System (UMTS), Wireless Local Area Networks (WLAN), and Wireless Fidelity (WF). It can be used for Fidelity (WiFi), 5th-Generation (5G) systems, cellular IoT systems, cellular passive IoT systems, and can also be used for subsequent evolution systems of 5G NR systems, as well as 6G and subsequent evolution systems.

[0038] It should be understood that in some embodiments of this application, "5G" may also be referred to as "5G NR" or "NR". It should be understood that in the description of the embodiments of this application, the term "correspondence" may indicate a direct or indirect correspondence between two things, or an association between them, or a relationship of instruction and being instructed, configuration and being configured, etc. In the embodiments of this application, "predefined" can be implemented by pre-storing corresponding codes, tables, or other methods that can be used to indicate relevant information in the device (e.g., including terminal devices and network devices). This application does not limit the specific implementation method. For example, predefined may refer to what is defined in a protocol. In the embodiments of this application, "protocol" may refer to standard protocols in the field of communication, such as the LTE protocol, the NR protocol, and related protocols applied to future communication systems. This application does not limit this.

[0039] CSI (Channel State Information) feedback:

[0040] This describes a method for channel negotiation between terminal devices and network devices. To enable reasonable scheduling by the network devices, the terminal devices need to report downlink channel state information (CSI) so that the base station can determine scheduling information for the terminal devices, such as the transmission layer number, precoding matrix, transmission beam, and modulation / coding scheme. Specifically, the terminal devices' CSI reporting is based on the CSI reporting configuration indicated by the network devices and the CSI-RS (Channel State Information-Reference Signals) sent by the network devices. The uplink resources used by the terminal devices for CSI reporting and the CSI-RS signals used for CSI measurement are both indicated by the CSI reporting configuration. Each CSI reporting configuration corresponds to one CSI report, and each CSI report can contain different information such as CRI (CSI-RS Resource Indicator), RI (Rank Indicator), PMI (Precoding Matrix Indicator), and CQI (Channel Quality Indicator). This information is obtained based on the CSI-RS signals configured and sent by the network devices. Specifically, the content / information included in CSI is determined by the report quantity information in the CSI reporting configuration.

[0041] The reported quantity information is used to indicate the combination of various channel state information reported by the CSI; the structure of the reported quantity information is shown below.

[0042] reportQuantity CHOICE{none NULL,cri-RI-PMI-CQI NULL,cri-RI-i1 NULL,cri-RI-i1-CQI SEQUENCE{pdsch-BundleSizeForCSI ENUMERATED{n2,n4}OPTIONAL–Need S},cri-RI-CQI NULL,cri-RSRP NULL,ssb-Index-RSRP NULL,cri-RI-LI-PMI-CQI NULL}.

[0043] The aforementioned cri-RI-PMI-CQI can be understood as reporting quantities including CRI, RI, PMI, and CQI. cri-RI-i1 can be understood as reporting quantities including CRI and RI, where il is a wideband indicator, representing the first level codebook W1 in a two-level codebook. cri-RI-i1-CQI adds CQI based on semi-open loop CSI feedback to cri-RI-i1. CQI is calculated based on i1 and assumes that the PDSCH transmission uses multiple randomly selected precodings. cri-RI-i1-CQI may also be followed by a sequence packet. pdsch-BundleSizeForCSI is an optional enumeration type (ENUMERATED), which can be n2 or n4, representing the size of the PDSCH (Physical Downlink Shared Channel) resource block. cri-RI-CQI can be understood as reporting quantities including CRI, RI, and CQI. CRI-RSRP can be understood as reporting quantities including CRI and RSRP (Reference Signal Received Power), used for CSI-RS-based beam management. SSB-Index-RSRP can be understood as reporting quantities including SSB (Synchronization Signal Block) index and RSRP, used for SSB-based beam management. CRI-RI-LI-PMI-CQI can be understood as reporting quantities including CRI, LI (Layer Indicator), RI, PMI, and CQI.

[0044] Specifically, CRI is used to determine the current CSI-RS resource for channel measurement and the current Interference Measurement Resource (IMR) for interference measurement from multiple CSI-RS resources. RI is used to report the recommended number of transport layers. PMI is used to determine the recommended precoding matrix from a predefined codebook. CQI is used to report the current channel quality. RSRP is used to report the RSRP of the SSB or CSI-RS corresponding to the fed-back index, thereby enabling the network side to determine the beam used for downlink transmission. LI is used to report the index of the transport layer associated with PTRS (Phase-tracking Reference Signals).

[0045] The RI / PMI / CQI can be determined based on the SINR (Signal-plus-Interference-to-Noise Ratio) estimated by the terminal. The channel component of SINR is determined based on a non-zero power CSI-RS configured by the network for channel measurement, while the interference component is determined based on a network-configured CSI-IM (Channel State Information-Interference Measurement) or a non-zero power CSI-RS for interference measurement. The CSI-RS resources used for channel measurement can include multiple antenna ports to measure the complete downlink channel and calculate the CSI. On the other hand, there are two types of codebooks used to determine the PMI: a normal codebook and a port-selected codebook. A normal codebook requires the terminal device to select a subset of beams from multiple beams and provide feedback through codebook parameters; a port-selected codebook requires the terminal device to select a subset of antenna ports from multiple antenna ports and provide feedback through codebook parameters, with each antenna port corresponding to one beam.

[0046] When a CSI report carries a large number of bits, it can be divided into two parts to prioritize the transmission of important CSI information. The information contained in CSI Part 1 and Part 2 for different codebook types is shown in Table 1. Part 1 has a fixed number of bits and carries a small amount of important information such as RI and CQI. Part 2 has a number of bits determined by Part 1 and carries more information such as PMI. When the code rate of the PUSCH (Physical Uplink Shared Channel) / PUCCH (Physical Uplink Control Channel) carrying the CSI exceeds a certain value, the terminal needs to discard some information in Part 2 of CSI to ensure the transmission performance of PUSCH / PUCCH; that is, the code rate cannot exceed the reference value configured by the network device. Specifically, information in Part 1 of CSI is not discarded; in Part 2 of CSI, lower-priority CSI reports are discarded first according to their reporting priority. The priority of CSI reporting is determined based on the periodicity of the CSI (periodic, semi-persistent, or aperiodic), the content of the CSI report (whether RSRP is reported), the carrier corresponding to the CSI report (i.e., carrier index), and the ID configured for CSI reporting. If a CSI has a low priority and information in CSI part 2 needs to be discarded, then the CSIs corresponding to odd-numbered subbands are discarded first, followed by the CSIs corresponding to even-numbered subbands, and finally the wideband CSIs, until the code rate meets the requirements.

[0047] Table 1. Information on CSI Part 1 and CSI Part 2

[0048] Downlink Type I codebook:

[0049] With the continuous evolution of antenna packaging technology, multiple antenna elements can be nested with chips to form an antenna panel or antenna array block. This makes it possible to configure multiple low-correlation antenna panels or antenna array blocks in a transmitter. By using beamforming technology with multiple antennas to concentrate the transmitted signal energy in a certain direction for transmission, coverage can be effectively improved, thereby enhancing communication performance. Multiple antenna panels or antenna array blocks can independently form transmission beams, allowing a single transmitter to simultaneously transmit data streams on multiple antenna panels or antenna array blocks using different beams or phases, thereby improving transmission capacity or reliability.

[0050] NR supports two types of codebooks: Type I and Type II. Release 16 further introduces an enhanced Type II codebook (eType II). The Type I codebook design largely follows the LTE codebook design, supporting normal spatial resolution and CSI accuracy. The Type I codebook uses a two-level codebook design from the LTE system, i.e., W = W1W2, where W1 is used to report beams (groups), and W2 is used to report at least one of the following: the beam selected from the beam group, the weighting coefficients between beams, and the phase between polarization directions. L = 1 and L = 4 (determining whether W2 is used to select the beam) determine whether a layer uses a single beam or a linear weighted average of multiple beams. Besides reusing the LTE codebook in the 2-port codebook, at least for scenarios with a single antenna panel or antenna array block at the transmitting end, other codewords in the NR Type I codebook can be represented by the following formula: W = W1W2, where... B = [b0, b1, ..., b L-1 This corresponds to L oversampled DFT (Discrete Fourier Transform) beams (which can be horizontal and vertical two-dimensional beams). Based on similar expressions, NR's Type I codebook also introduces several enhancements:

[0051] • When Rank=1 or 2, the network-side configuration is supported for L=1 and L=4. When L=1, W2 only feeds back the inter-polarization phase. When L=4, W2 is used to select a beam from the beam group corresponding to W1 and feed back the inter-polarization phase. The beam group definition adopts only one of the three beam group patterns defined by LTE, as shown in Figure 1. Figure 1 shows the pattern of beam group (B) supported by L=4; part (1) in Figure 1 shows the pattern corresponding to the horizontal port, and part (2) in Figure 1 shows the pattern corresponding to the two-dimensional port.

[0052] • When Rank=3 or 4, only L=1 is supported. The codebook design of LTE is reused when there are fewer than 16 ports, while the codebooks of 16 and 32 ports add phase feedback between orthogonal beams on the basis of the LTE codebook.

[0053] • When Rank is greater than 4, only L=1 is supported and a fixed orthogonal beam is used.

[0054] • A Type I codebook for multiple antenna panels is introduced, which adds phase reporting between antenna panels (which can be broadband or sub-band) to the single antenna panel codebook. Each antenna panel still uses the single antenna panel codebook, and different antenna panels are based on the same beam information feedback. However, whether different antenna panels use the same polarization phase feedback is determined by the network device configuration (mode = 1 / 2).

[0055] • A codebook subset restriction (CSR) for Type I codebooks has been introduced, which allows for codebook subset restrictions to be applied to each DFT beam and each Rank. The PMI corresponding to the restricted beam cannot be reported by the terminal.

[0056] Figure 2 shows a schematic diagram of a mobile communication system provided in an exemplary embodiment of this application. The mobile communication system includes a network device 110 and a terminal device 120, and may or may not include a terminal device 130; this application does not limit this.

[0057] The network device 110 in this application provides wireless communication functionality. This network device 110 includes, but is not limited to: an evolved Node B (eNB), a Radio Network Controller (RNC), a Node B (NB), a Base Station Controller (BSC), a Base Transceiver Station (BTS), a Home Evolved Node B (or Home Node B, HNB), a Base Band Unit (BBU), an Access Point (AP) in a Wireless Fidelity (Wi-Fi) system, a wireless relay node, a wireless backhaul node, a Transmission Point (TP), or a Transmission and Reception Point (TRP), etc. It can also be used for next-generation Node B (Next Generation Node) systems in 5G mobile communication systems. B, gNB) or transmission point (TRP or TP), or, in a 5G system, one or a group of antenna panels (including multiple antenna panels) of a base station, or, network nodes constituting a gNB or transmission point, such as baseband unit (BBU) or distributed unit (DU), or base stations in Beyond Fifth Generation (B5G) or 6th Generation (6G) mobile communication systems, or core network (CN), fronthaul, backhaul, radio access network (RAN), network slicing, etc., or serving cell, primary cell (PCell), primary secondary cell (PSCell), special cell (SpCell), secondary cell (SCell), neighboring cell, etc. of terminal equipment.

[0058] The terminal equipment 120 in this application is also referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication equipment, user agent, or user device. This terminal includes, but is not limited to: handheld devices, wearable devices, in-vehicle devices, and IoT devices, such as: mobile phones, tablets, e-readers, laptops, desktop computers, televisions, game consoles, mobile internet devices (MID), augmented reality (AR) terminals, virtual reality (VR) terminals, mixed reality (MR) terminals, extended reality (XR) terminals, baffle reality (BR) terminals, cinematic reality (CR) terminals, deceive reality (DR) terminals, wearable devices, controllers, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical care, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, and wireless terminals in remote surgery. Wireless terminals, cellular phones, cordless phones, Session Initiation Protocol (SIP) phones, Wireless Local Loop (WLL) stations, Personal Digital Assistants (PDAs), Set-Top Boxes (STBs), and Customer Premise Equipment (CPEs) are all examples of devices used in medical surgery.

[0059] In some embodiments, network device 110 and terminal device 120 communicate with each other through some air interface technology, such as the Uu interface.

[0060] For example, there are two communication scenarios between network device 110 and terminal device 120: uplink communication scenario and downlink communication scenario. Uplink communication, or uplink transmission, refers to sending signals or data to network device 110; downlink communication, or downlink transmission, refers to sending signals or data to terminal device 120.

[0061] In some embodiments, terminal device 120 and terminal device 130 communicate with each other through some air interface technology, such as the PC5 interface.

[0062] For example, there are two communication scenarios between terminal device 120 and terminal device 130: a first side-by-side communication scenario and a second side-by-side communication scenario. The first side-by-side communication refers to terminal device 120 sending signals to terminal device 130; the second side-by-side communication refers to terminal device 130 sending signals to terminal device 120.

[0063] In some embodiments, terminal device 120 and terminal device 130 are both within network coverage and located in the same cell, or terminal device 120 and terminal device 130 are both within network coverage but located in different cells, or terminal device 120 is within network coverage but terminal device 130 is outside network coverage.

[0064] In some embodiments of this application, "NR" may also be referred to as a 5G NR system or a 5G system. The 5G mobile communication system may include non-standalone (NSA) and / or standalone (SA) networking.

[0065] The technical solutions provided in the embodiments of this application can also be applied to Machine-Type Communication (MTC), Long Term Evolution-Machine (LTE-M) technology, Device-to-Device (D2D) networks, Machine-to-Machine (M2M) networks, Internet of Things (IoT) networks, or other networks. Among them, IoT networks may include, for example, vehicle-to-everything (V2X) networks. The communication methods in V2X systems are collectively referred to as Vehicle to X (V2X), where X can represent anything. For example, V2X may include: Vehicle to Vehicle (V2V) communication, Vehicle to Infrastructure (V2I) communication, Vehicle to Pedestrian (V2P) communication, or Vehicle to Network (V2N) communication, etc.

[0066] The mobile communication system provided in this application embodiment can be applied to at least one of the following communication scenarios: uplink communication scenario, downlink communication scenario, and sidelink communication scenario.

[0067] The codebooks and CSI feedback in related technologies are based on the assumption of far-field channels. For example, all antenna ports on the same antenna panel or antenna array block have the same beam direction relative to the terminal device, and all antenna ports can share the same polarization phase. However, with the increase in the number and size of antennas, the transmission channel may be a near-field channel or a far-field channel depending on the number of antennas, array size, and distance between the terminal device and the base station. For near-field channels, there is a non-stationary characteristic, and different antenna panels or antenna ports that are far apart on the same antenna panel need to use different beams and / or polarization phases to ensure that the CSI matches the actual channel. Since the network device cannot know whether the current channel is a near-field channel or a far-field channel, it cannot determine whether different antenna ports should use the same beam and / or polarization phase, or which antenna ports can use the same beam and / or polarization phase. In related technologies, the terminal device only determines how many beam and phase information to feed back based on the number of antenna ports and the random configuration of the network, which leads to inaccurate CSI feedback or unnecessary CSI overhead.

[0068] Figure 3 shows a flowchart of an information reporting method provided in an exemplary embodiment of this application. The method is executed by a terminal device, which may be the terminal device shown in Figure 2. The method includes:

[0069] Step 210-1: Report first information to the network device. The first information indicates the number of antenna port groups in the downlink antenna ports configured on the network device that use independent beams and / or independent intra-group phases. Intra-group phase refers to the phase between different polarization directions within an antenna port group.

[0070] In some embodiments, the first information is used to indicate the number of antenna port groups employing independent beams; or, the first information is used to indicate the number of antenna port groups employing independent intra-group phase; or, the first information is used to indicate the number of antenna port groups employing both independent beams and independent intra-group phase, wherein the number of antenna port groups employing independent beams and the number of antenna port groups employing independent intra-group phase are the same or different. The number of antenna port groups employing independent beams and the number of antenna port groups employing independent intra-group phase can be indicated together or separately. That is, when the first information indicates the number of antenna port groups employing both independent beams and independent intra-group phase, the first information may include one quantity (the number of antenna port groups employing independent beams is the same as the number of antenna port groups employing independent intra-group phase, i.e., different antenna port groups employ independent beams and independent intra-group phase) or it may include two quantities (the number of antenna port groups employing independent beams is different from the number of antenna port groups employing independent intra-group phase). Alternatively, the first information can be used to indicate a first number of antenna port groups employing independent beams; or, the first information can be used to indicate a second number of antenna port groups employing independent intra-group phase; or, the first information can be used to indicate a third number of antenna port groups employing both independent beams and independent intra-group phase; or, the first information can be used to indicate both a first number of antenna port groups employing independent beams and a second number of antenna port groups employing independent intra-group phase. In some embodiments, the terminal device indicates the number of antenna port groups recommended by the terminal device by reporting the first information to the network device. Different antenna port groups employ independent beams and / or independent intra-group phases, while antenna port groups within a single group employ the same beam and the same intra-group phase. For example, if the first information indicates that the number of antenna port groups using independent beams is 8, it means that the terminal recommends 8 antenna port groups, which use independent beams; if the first information indicates that the number of antenna port groups using independent intra-group phase is 4, it means that the terminal device recommends 4 antenna port groups, which use independent intra-group phase; if the first information indicates that the number of antenna port groups using both independent beams and independent intra-group phase is 8, it means that the terminal device recommends 8 antenna port groups, which use both independent beams and independent intra-group phase; if the first information indicates that the number of antenna port groups using independent beams is 8 and the number of antenna port groups using independent intra-group phase is 4, it means that 8 antenna port groups use independent beams, where every two antenna port groups use the same intra-group phase (i.e., there are 4 antenna port groups relative to the intra-group phase). Optionally, the terminal device receives and measures the downlink reference signal sent by the network device; and determines the first information based on the measured downlink channel information.

[0071] Step 220-1: Based on the first information, report the CSI information corresponding to the antenna port group to the network device.

[0072] The antenna port group refers to an antenna port group that employs an independent beam and / or an independent intra-group phase. CSI information is used to indicate the beam and / or intra-group phase used by each antenna port group in the antenna port group recommended by the terminal device; or, CSI information is used to indicate the beam and / or intra-group phase used by each antenna port group in the antenna port group determined according to the first information; or, CSI information is used to indicate the beam and intra-group phase used by each antenna port group in the antenna port group indicated in step 220-1 above.

[0073] Alternatively, step 210-2: Report first information to the network device. The first information indicates whether the multiple antenna port groups configured on the network device correspond to the same beam and / or the same intra-group phase. The intra-group phase refers to the phase between different polarization directions within the antenna port group.

[0074] In some embodiments, the network device is configured with multiple downlink antenna port groups, or in other words, the number of downlink antenna port groups can be configured by the network device for the terminal device. That is, the terminal device does not need to recommend the grouping method of the antenna port groups to the network device, but only needs to determine whether the same beam and / or the same intra-group phase should be used based on the multiple antenna port groups configured by the network device. Optionally, the terminal device receives and measures the downlink reference signal transmitted by the network device; and determines the first information based on the measured downlink channel information.

[0075] In some embodiments, the first information is used to indicate whether the multiple antenna port groups configured by the network device correspond to the same beam; or, the first information is used to indicate whether the multiple antenna port groups configured by the network device correspond to the same intra-group phase; or, the first information is used to indicate whether the multiple antenna port groups configured by the network device correspond to the same beam and the same intra-group phase.

[0076] Step 220-2: Based on the first information, report the CSI information corresponding to multiple antenna port groups to the network device.

[0077] The CSI information is used to indicate that multiple antenna port groups use the same beam and / or the same intra-group phase, or, the CSI information is used to indicate that multiple antenna port groups use independent beams and / or independent intra-group phases, or, the multiple antenna port groups can be divided into a first part antenna port group and a second part antenna port group, the CSI information is used to indicate that the first part antenna port group uses the same first beam and / or the same first intra-group phase, and the second part antenna port group uses the same second beam and / or the same second intra-group phase, wherein the first beam and the second beam are independent beams, and the first intra-group phase and the second intra-group phase are independent intra-group phases.

[0078] In summary, the methods provided in this application illustrate two information reporting approaches. Approach one involves the terminal device determining the number of antenna port groups using independent beams and / or independent intra-group phases. This means the terminal device recommends the division of antenna port groups. Since the terminal device is the measurer of the downlink channel, it has a clearer understanding of downlink channel information. By having the terminal device determine and use the first information to recommend the number of antenna port groups using independent beams and / or independent intra-group phases, the antenna port group division determined by the network device based on the first information better matches the downlink channel state, improving feedback accuracy. Approach two involves the network device pre-configuring multiple antenna port groups. The terminal device is responsible for determining whether these antenna port groups use the same beam and / or the same intra-group phase. This also allows the terminal device to determine whether to use the same beam and / or the same intra-group phase based on the downlink channel state, further improving feedback accuracy. Furthermore, the improved feedback accuracy further reduces the high signaling overhead caused by erroneous feedback (e.g., in scenarios where only the same beam is needed, erroneous feedback uses independent beams, leading to increased CSI information).

[0079] Figure 4 shows a flowchart of an information reporting method provided in an exemplary embodiment of this application. The method is executed by a network device, which may be the network device shown in Figure 2. The method includes:

[0080] Step 310-1: Receive the first information reported by the terminal device. The first information indicates the number of antenna port groups in the downlink antenna ports configured by the network device that use independent beams and / or independent intra-group phases. Intra-group phase refers to the phase between different polarization directions within an antenna port group.

[0081] In some embodiments, the first information is used to indicate the number of antenna port groups employing independent beams; or, the first information is used to indicate the number of antenna port groups employing independent intra-group phase; or, the first information is used to indicate the number of antenna port groups employing both independent beams and independent intra-group phase, wherein the number of antenna port groups employing independent beams and the number of antenna port groups employing independent intra-group phase are the same or different. The number of antenna port groups employing independent beams and the number of antenna port groups employing independent intra-group phase can be indicated together or separately. That is, when the first information indicates the number of antenna port groups employing both independent beams and independent intra-group phase, the first information may include one quantity (the number of antenna port groups employing independent beams is the same as the number of antenna port groups employing independent intra-group phase, i.e., different antenna port groups employ independent beams and independent intra-group phase) or it may include two quantities (the number of antenna port groups employing independent beams is different from the number of antenna port groups employing independent intra-group phase). Alternatively, the first information can be used to indicate the first number of antenna port groups using independent beams; or, the first information can be used to indicate the second number of antenna port groups using independent in-group phases; or, the first information can be used to indicate the first number of antenna port groups using independent beams and the second number of antenna port groups using independent in-group phases; or, the first information can be used to indicate the third number of antenna port groups using independent beams and independent in-group phases.

[0082] In some embodiments, the terminal device indicates the number of antenna port groups recommended by the terminal device by reporting first information to the network device. Different antenna port groups use independent beams and / or independent intra-group phases, while antenna port groups use the same beams and the same intra-group phases. For example, if the first information indicates that the number of antenna port groups using independent beams is 8, it means that the terminal recommends 8 antenna port groups, which use independent beams; if the first information indicates that the number of antenna port groups using independent intra-group phase is 4, it means that the terminal device recommends 4 antenna port groups, which use independent intra-group phase; if the first information indicates that the number of antenna port groups using both independent beams and independent intra-group phase is 8, it means that the terminal device recommends 8 antenna port groups, which use both independent beams and independent intra-group phase; if the first information indicates that the number of antenna port groups using independent beams is 8 and the number of antenna port groups using independent intra-group phase is 4, it means that 8 antenna port groups use independent beams, where every two antenna port groups use the same intra-group phase (i.e., there are 4 antenna port groups relative to the intra-group phase). Optionally, the terminal device receives and measures the downlink reference signal sent by the network device; and determines the first information based on the measured downlink channel information.

[0083] In some embodiments, the network device determines the antenna port group based on first information sent by the terminal device.

[0084] Step 320-1: Based on the first information, receive the CSI information corresponding to the antenna port group reported by the terminal device.

[0085] The antenna port group refers to an antenna port group that employs an independent beam and / or an independent intra-group phase. CSI information is used to indicate the beam and / or independent intra-group phase employed by each antenna port group in the antenna port group recommended by the terminal device; or, CSI information is used to indicate the beam and / or intra-group phase employed by each antenna port group in the antenna port group determined according to the first information; or, CSI information is used to indicate the beam and intra-group phase employed by each antenna port group in the antenna port group indicated in step 220-1 above.

[0086] Alternatively, step 310-2: Receive first information reported by the terminal device. The first information indicates whether the multiple antenna port groups configured by the network device correspond to the same beam and / or the same intra-group phase. The intra-group phase refers to the phase between different polarization directions within the antenna port group.

[0087] In some embodiments, the network device is configured with multiple downlink antenna port groups, or in other words, the number of downlink antenna port groups can be configured by the network device for the terminal device. That is, the terminal device does not need to recommend the grouping method of the antenna port groups to the network device, but only needs to determine whether the same beam and / or the same intra-group phase should be used based on the multiple antenna port groups configured by the network device. Optionally, the terminal device receives and measures the downlink reference signal transmitted by the network device; and determines the first information based on the measured downlink channel information.

[0088] In some embodiments, the first information is used to indicate whether the multiple antenna port groups configured by the network device correspond to the same beam; or, the first information is used to indicate whether the multiple antenna port groups configured by the network device correspond to the same intra-group phase; or, the first information is used to indicate whether the multiple antenna port groups configured by the network device correspond to the same beam and the same intra-group phase.

[0089] Step 320-2: Based on the first information, receive the CSI information corresponding to multiple antenna port groups reported by the terminal device.

[0090] The CSI information is used to indicate that multiple antenna port groups use the same beam and / or the same intra-group phase, or, the CSI information is used to indicate that multiple antenna port groups use independent beams and / or independent intra-group phases, or, the multiple antenna port groups can be divided into a first part antenna port group and a second part antenna port group, the CSI information is used to indicate that the first part antenna port group uses the same first beam and / or the same first intra-group phase, and the second part antenna port group uses the same second beam and / or the same second intra-group phase, wherein the first beam and the second beam are independent beams, and the first intra-group phase and the second intra-group phase are independent intra-group phases.

[0091] In summary, the methods provided in this application illustrate two information reporting approaches. Approach one involves the terminal device determining the number of antenna port groups using independent beams and / or independent intra-group phases. This means the terminal device recommends the division of antenna port groups. Since the terminal device is the measurer of the downlink channel, it has a clearer understanding of downlink channel information. By having the terminal device determine and use the first information to recommend the number of antenna port groups using independent beams and / or independent intra-group phases, the antenna port group division determined by the network device based on the first information better matches the downlink channel state, improving feedback accuracy. Approach two involves the network device pre-configuring multiple antenna port groups. The terminal device is responsible for determining whether these antenna port groups use the same beam and / or the same intra-group phase. This also allows the terminal device to determine whether to use the same beam and / or the same intra-group phase based on the downlink channel state, further improving feedback accuracy. Furthermore, the improved feedback accuracy further reduces the high signaling overhead caused by erroneous feedback (e.g., in scenarios where only the same beam is needed, erroneous feedback uses independent beams, leading to increased CSI information).

[0092] The following section introduces CSI information.

[0093] In some embodiments, CSI information includes beam information and / or phase information. The beam information indicates the beam used by the antenna port group; the phase information indicates the intra-group phase used by the antenna port group, i.e., the phase information indicates the phase between different polarizations within the antenna port group.

[0094] The beam information can indicate one or a group of beams. For example, a group of beams may include a vertical beam and a horizontal beam, or a group of beams may include multiple beams linearly combined using coefficients. Furthermore, beams can be represented by DFT vectors, in which case the beam information serves as the indication information for the DFT vectors, used to indicate one or more DFT vectors from the set of DFT vectors configured in the network device. Optionally, the multiple DFT vectors may correspond to horizontal and vertical DFT vectors, respectively.

[0095] Phase information is used to indicate the intra-group phase adopted by the antenna port group, that is, the phase information is used to indicate the phase between antenna ports with different polarization directions within the antenna port group. Specifically, the intra-group phase can be the relative phase of the second polarization direction with respect to the first polarization direction, that is, the weighted value on the antenna port corresponding to the second polarization direction (assuming the weighted value on the antenna port corresponding to the first polarization direction is 1). Here, the antenna port corresponding to the first polarization direction is the first half of the antenna ports in an antenna port group, and the antenna port corresponding to the second polarization direction is the second half of the antenna ports in an antenna port group; therefore, the intra-group phase is the weighted value on the second half of the antenna ports in an antenna port group. Alternatively, the antenna port corresponding to the first polarization direction can be the second half of the antenna ports in an antenna port group, and the antenna port corresponding to the second polarization direction can be the first half of the antenna ports in an antenna port group; this embodiment of the application does not limit this. That is, the antenna port corresponding to the first polarization direction and the antenna port corresponding to the second polarization direction belong to different antenna ports within the same antenna port group. For example, the intra-group phase can be indicated from the BSPK element {1, -1} (using 1 bit to indicate the intra-group phase), or from the QPSK element {1, -1, j, -j} (using 2 bits to indicate the intra-group phase), or a larger set of elements such as 8PSK elements (using 3 bits to indicate the intra-group phase) or 16QAM elements (using 4 bits to indicate the intra-group phase) can be considered to achieve higher phase accuracy.

[0096] In some embodiments, when the first information indicates the number of antenna port groups using independent beams, the CSI information includes beam information; when the first information indicates the number of antenna port groups using independent in-group phase, the CSI information includes phase information; when the first information indicates the number of antenna port groups using both independent beams and independent in-group phase, the CSI information includes both beam information and phase information. In other embodiments, regardless of which scenario the first information indicates, the CSI information includes both beam information and phase information.

[0097] In some embodiments, when the first information indicates whether the multiple antenna port groups configured by the network device correspond to the same beam, the CSI information includes beam information; when the first information indicates whether the multiple antenna port groups configured by the network device correspond to the same intra-group phase, the CSI information includes phase information; when the first information indicates whether the multiple antenna port groups configured by the network device correspond to both the same beam and the same intra-group phase, the CSI information includes both beam information and phase information. In other embodiments, regardless of which scenario the first information indicates, the CSI information includes both beam information and phase information.

[0098] In some embodiments, the CSI information further includes fifth phase information, which indicates the relative phase information between antenna port groups determined according to the first information or between multiple antenna port groups configured in the network device. That is, the fifth phase information indicates the relative phase information between antenna port groups determined according to the first information, or the fifth phase information indicates the relative phase information between multiple antenna port groups configured in the network device. The relative phase information indicates the phase of each antenna port group relative to a reference antenna port group. The reference antenna port group is one of multiple antenna port groups configured in the network device, or the reference antenna port group is one of the antenna port groups determined according to the first information. For example, the reference antenna port group is the first antenna port group among multiple antenna port groups configured in the network device; or, the reference antenna port group is the first antenna port group among the antenna port groups determined according to the first information.

[0099] The fifth phase information is used to indicate an M×1 dimensional vector, where M is the number of antenna port groups, and one element in the vector corresponds to one antenna port group. Each element in this vector can be indicated by QPSK elements, similar to the method used to indicate vectors within a group. Assuming the weight of the first antenna port group is fixed at 1, the fifth phase information only needs to include M-1 elements. These M-1 elements correspond to the relative phase of each antenna port group from the second to the Mth antenna port groups with respect to the first antenna port group.

[0100] In summary, the method provided in this application illustrates the specific content of CSI information. The CSI information first includes beam information and / or phase information, used to indicate the beam and / or intra-group phase of the antenna port group. The CSI information is reported to the network device to support the network device in performing data precoding operations based on the CSI information, thereby enabling data transmission. Furthermore, the CSI information also includes fifth phase information, which indicates the relative phase information between multiple antenna port groups, facilitating the network device in determining the final precoding method.

[0101] In other words, the first information has two indication forms: one is to indicate the number of antenna port groups using independent beams and / or independent intra-group phases, and the other is to indicate whether the antenna port groups configured in the network device correspond to the same beam and / or the same intra-group phase. The two indication forms of the first information will be further introduced below.

[0102] Indication Form 1: Indicates the number of antenna port groups that use independent beams and / or independent phases within the group.

[0103] In the scenario corresponding to indication form one, the network device only indicates the number of downlink antenna ports and / or the agreed set of optional antenna port groups to the terminal. The terminal device needs to determine or select the number of antenna port groups based on the measured downlink channel information. However, the final number of beams and / or phases within a group is determined by the network device itself based on the number of antenna port groups determined or selected by the terminal device.

[0104] In some embodiments, the number of antenna port groups employing independent beams and / or independent intra-group phases is determined from a first set of quantities. The first set of quantities is pre-configured by the network device; or, the first set of quantities is determined based on the number of downlink antenna ports configured by the network device.

[0105] Optionally, the first quantity set is pre-configured by the network device, such as the first quantity set being indicated to the terminal device by the network device through higher-layer signaling (such as CSI reporting configuration); or, the first quantity set is determined by the terminal device based on the number of downlink antenna ports configured by the network device, such as the terminal device and the network device pre-agreeing on the first quantity set corresponding to different numbers of downlink antenna ports, and the terminal device obtaining the first quantity set by querying the number of downlink antenna ports after determining the number of downlink antenna ports.

[0106] Wherein, the quantity in the first quantity set is a power of 2; or, the quantity in the first quantity set is 1 and several even numbers; or, the quantity in the first quantity set is 1 and at least one even number. For example, the first quantity set is {1, 2, 4}; or, the first quantity set is {1, N / 4, N / 8, N / 16}, where N is the number of downlink antenna ports configured in the network device.

[0107] For example, the correspondence between the first set of quantities agreed upon by the terminal device and the network device and the number of different downlink antenna ports (i.e., the total number) is shown in Table 2 below.

[0108] Table 2. Correspondence between the first set of quantities and the number of different downlink antenna ports

[0109] In some embodiments, the terminal device determines the content of the reported CSI information, such as the content of beam information and / or the content of phase information, based on the first information.

[0110] In some embodiments, the first information indicates that the number of antenna port groups using independent beams is M; step 220-1 above includes: reporting first beam information to the network device, the first beam information including M beam information, and there is a one-to-one correspondence between the M beam information and the M antenna port groups using independent beams. That is, when the first information indicates that the M antenna port groups use independent beams, the terminal device needs to report M beam information. At this time, these M antenna port groups can agree to use the same intra-group phase.

[0111] In some embodiments, the first information indicates that the number of antenna port groups using independent intra-group phase is M; step 220-1 above includes: reporting first phase information to the network device, the first phase information including M phase information, and there is a one-to-one correspondence between the M phase information and the M antenna port groups using independent intra-group phase. That is, when the first information indicates that the M antenna port groups use independent intra-group phase, the terminal device needs to report M phase information. At this time, these M antenna port groups can agree to use the same beam.

[0112] Optionally, if the first information only indicates an antenna port group using an independent beam or an independent intra-group phase, the unindicated intra-group phase or beam can be agreed to use the same intra-group phase or beam.

[0113] In some embodiments, the first information indicates that the number of antenna port groups using independent beams and independent intra-group phases is M; step 220-1 above includes: reporting first beam information and first phase information to the network device. The first beam information includes M beam information, and there is a one-to-one correspondence between the M beam information and the M antenna port groups using independent beams. The first phase information includes M phase information, and there is a one-to-one correspondence between the M phase information and the M antenna port groups using independent intra-group phases. That is, when the first information indicates that the M antenna port groups use independent beams and independent intra-group phases, the terminal device needs to report M beam information and M phase information.

[0114] In some embodiments, the first information indicates that the number of antenna port groups using independent beams is M, and the number of antenna port groups using independent intra-group phase is O. Step 220-1 includes: reporting first beam information and first phase information to the network device. The first beam information includes M beam information entries, each corresponding one-to-one with one of the M antenna port groups using independent beams. The first phase information includes O phase information entries, each corresponding one-to-one with one of the O antenna port groups using independent intra-group phase. That is, when the first information indicates that M antenna port groups use independent beams and O antenna port groups use independent intra-group phase, the terminal device needs to report M beam information entries and O phase information entries.

[0115] In some embodiments, the first information indicates that the number of antenna port groups using independent beams is M; the above step 320-1 includes: receiving the first beam information reported by the terminal device, the first beam information including M beam information, and there is a one-to-one correspondence between the M beam information and the M antenna port groups using independent beams.

[0116] In some embodiments, the first information indicates that the number of antenna port groups using independent intra-group phase is M; the above step 320-1 includes: receiving the first phase information reported by the terminal device, the first phase information including M phase information, and there is a one-to-one correspondence between the M phase information and the M antenna port groups using independent intra-group phase.

[0117] In some embodiments, the first information indicates that the number of antenna port groups using independent beams and independent in-group phases is M; the above step 320-1 includes: receiving the first beam information and the first phase information reported by the terminal device, wherein the first beam information includes M beam information, and there is a one-to-one correspondence between the M beam information and the M antenna port groups using independent beams, and the first phase information includes M phase information, and there is a one-to-one correspondence between the M phase information and the M antenna port groups using independent in-group phases.

[0118] In some embodiments, the first information indicates that the number of antenna port groups using independent beams is M, and the number of antenna port groups using independent in-group phase is O; the above step 320-1 includes: receiving the first beam information and the first phase information reported by the terminal device, wherein the first beam information includes M beam information, and there is a one-to-one correspondence between the M beam information and the M antenna port groups using independent beams, and the first phase information includes O phase information, and there is a one-to-one correspondence between the O phase information and the O antenna port groups using independent in-group phase.

[0119] In summary, the method provided in this application, by having the terminal device determine the number of antenna port groups using independent beams and / or independent intra-group phases, essentially recommends the division of antenna port groups. Since the terminal device is the measurer of the downlink channel, it has a clearer understanding of downlink channel information. Having the terminal device determine and recommend the number of antenna port groups using independent beams and / or independent intra-group phases based on the first information ensures that the antenna port group division determined by the network device based on the first information better matches the downlink channel state, thus improving the accuracy of feedback. Furthermore, since this number is determined based on a first set of quantities, and the number that the terminal device can indicate is limited, the complexity of implementation for both the terminal device and the network device is reduced.

[0120] It should be noted that, in the scenario corresponding to indication form one, the terminal device divides the configured downlink antenna ports into antenna port groups based on the first information. In some embodiments, the terminal device determines the antenna ports included in each antenna port group based on the number of antenna port groups indicated by the first information and the downlink antenna ports configured by the network device. For example, the network device configures a CSI-RS resource, which includes N downlink antenna ports. Based on measurements on the CSI-RS resource, the terminal device provides feedback on the recommended number of antenna port groups to be divided among the N antenna ports, wherein different antenna port groups use independent beams and / or independent intra-group phases. Correspondingly, the network device can also determine the division of antenna port groups using the same method based on the first information reported by the terminal device, thereby ensuring the consistency of antenna port group division on both the transmitting and receiving sides.

[0121] Furthermore, after the terminal device determines the division of antenna port groups, it can obtain the beam information and / or phase information corresponding to each antenna port group based on the channel information measured on each antenna port group. Correspondingly, the network device can determine the beam and / or intra-group phase on each antenna port group based on the beam information and / or phase information reported by the terminal device, thereby performing precoding of the data on each antenna port group. By agreeing to perform antenna port group division based on the first information, it can be guaranteed that the final precoding implemented on the antenna port group matches the channel on that antenna port group.

[0122] Antenna port groups can be partitioned using either of the following two methods: Method 1: Sequential and continuous partitioning; Method 2: Sequential but non-contiguous partitioning. The following sections will describe these two partitioning methods.

[0123] First, let's introduce some relevant parameters. The network device is configured with N downlink antenna ports (hereinafter referred to as antenna ports). The number of antenna port groups determined based on the first information is M, and the number of antenna ports in each antenna port group is K. These three parameters satisfy the formula N = M × K. Therefore, knowing any two of the above three parameters is sufficient to divide the antenna port groups. Furthermore, N, M, and K are all positive integers.

[0124] • Dividing method 1: Sequential and continuous division.

[0125] Method 1 involves dividing the N antenna ports, arranged in ascending (or descending) order of port number, into M antenna port groups. Each antenna port group includes K antenna ports arranged in ascending (or descending) order. For example, the i-th antenna port group should include the (i-1)*K+1 to i*K-th antenna ports from the N antenna ports. In other words, the i-th antenna port group includes the antenna ports ranked from the first to the second position among the N antenna ports. The first position is the value of i minus 1 multiplied by K plus one, and the second position is the value of i multiplied by K.

[0126] If expressed as a formula, it can be represented as follows: The port number p of the j-th antenna port in the i-th antenna port group of M antenna port groups is: p = p0 + (i-1)*K + j-1, where p0 is the port number of the first antenna port in the N downlink antenna ports, such as 0 or 3000. Here, i and j are both positive integers, p is 0 or a positive integer, and p0 is 0 or a positive integer. Alternatively, the port number p of the antenna port in the i-th antenna port group can be expressed as: p = p0 + (i-1)*K + j-1, where j is the sequence number / number of the antenna port in the i-th antenna port group. If expressed as a sequence, it can be represented as: The port number of the antenna port in the i-th antenna port group of M antenna port groups is {p0 + (i-1)*K, p0 + (i-1)*K+1, ..., p0 + i*K-1}, where p0 is the port number of the first antenna port in the N downlink antenna ports.

[0127] The above formula or sequence can also be expressed as follows: The port number of the j-th antenna port in the i-th antenna port group of M antenna port groups is the sum of the reference port number and the j-th offset value. The j-th offset value is the offset of the j-th antenna port number relative to the reference port number. The j-th offset value is the j-th term in the first arithmetic sequence. The initial term of the first arithmetic sequence is the first product value minus 1. The first product value is i minus 1 multiplied by K. The common difference of the first arithmetic sequence is 1. This reference port number is the port number of the first antenna port in the N downlink antenna ports. The first arithmetic sequence can be represented as a j=a0 + j × d = (i-1) × K-1 + j × 1, where a0 represents the initial term of the first arithmetic sequence, which is (i-1) × K-1; d represents the common difference, which is 1; a j This represents the value of the j-th term in the first arithmetic sequence, which can be understood as the j-th offset value.

[0128] It should be noted that the above formula can also be expressed in a similar equivalent way, such as the formula listed above based on the sum of the reference port number and the j-th offset value, which can also be written as: p = p0 + a j a j =a0+j×d=(i-1)×K-1+j×1. This application does not limit the scope of the embodiments, but other calculation methods that yield the same result as the method shown in this application are also within the protection scope of this application.

[0129] In summary, the method provided in this application illustrates an antenna port partitioning scheme. The partitioned antenna port group includes sequential and consecutive antenna ports. The network device and the terminal device pre-agree on the antenna port partitioning scheme, meaning that the partitioning of antenna ports by the terminal device and the network device is consistent. At this time, the terminal device reports CSI information to the network device based on the channel measurement results on the antenna port group. The network device then determines the precoding on the antenna port group based on the CSI information reported by the terminal device, thereby ensuring that the final precoding implemented on the antenna port group matches the channel on that antenna port group.

[0130] • Dividing method two: Sequential but not continuous division.

[0131] The second partitioning method involves arranging the N antenna ports in ascending (or descending) order of port number, then dividing them into a first N / 2 group and a last N / 2 group (which can be referred to as the first and second group of antenna ports). Each group of antenna ports includes K / 2 antenna ports from the first group and K / 2 antenna ports from the second group, arranged in ascending (or descending) order. For example, the i-th antenna port group includes the (i-1)*K / 2+1 to i*K / 2 antenna ports and the (i-1)*K / 2+N / 2+1 to i*K / 2+N / 2 antenna ports from the N antenna ports. In other words, the i-th antenna port group includes the third to fourth and fifth to sixth antenna ports out of the N downlink antenna ports. The third position is the value of i minus 1 multiplied by the first ratio plus 1, where the first ratio is the ratio of K to 2. The fourth position is the value of m multiplied by the first ratio. The fifth position is the value of m minus 1 multiplied by the first ratio plus the second ratio and 1, where the second ratio is the ratio of N to 2. The sixth position is the value of m multiplied by the first ratio plus the second ratio.

[0132] If expressed as a formula, it can be written as follows: When 1 ≤ j ≤ K / 2, the port number p of the j-th antenna port in the i-th antenna port group is: p = p0 + (i-1)*K / 2 + j-1; when K / 2 < j ≤ K, the port number p of the j-th antenna port in the i-th antenna port group is: p = p0 + (i-1)*K / 2 + N / 2 + jK / 2 - 1. Here, i and j are positive integers, p is 0 or a positive integer, and p0 is 0 or a positive integer. It can also be expressed as a piecewise function as shown below. Since j is a positive integer, K / 2 < j ≤ K and K / 2 + 1 ≤ j ≤ K are equivalent.

[0133] If represented by a sequence, it can be expressed as: the port number of the antenna port in the i-th antenna port group is {p0+(i-1)*K / 2, p0+(i-1)*K / 2+1, ..., p0+i*K / 2-1, p0+(i-1)*K / 2+N / 2, p0+(i-1)*K / 2+N / 2+1, ..., p0+i*K / 2+N / 2-1}.

[0134] The above formula or sequence can also be expressed as follows: The port number of the j-th antenna port in the i-th antenna port group of M antenna port groups is the sum of the reference port number and the j-th offset value. When j is less than or equal to K divided by 2, the j-th offset value is the j-th term in the second arithmetic sequence. The initial term of the second arithmetic sequence is the second product minus 1. The second product is the value of i minus 1 multiplied by the first ratio, where the first ratio is the ratio of K to 2. The common difference of the second arithmetic sequence is 1. When j is greater than K divided by 2, the j-th offset value is the s-th term in the third arithmetic sequence, where s is the difference between j and the first ratio. The initial term of the third arithmetic sequence is the second product plus the second ratio minus 1. The second ratio is the ratio of N to 2. The common difference of the third arithmetic sequence is 1. This reference port number is the port number of the first antenna port in the N downlink antenna ports. The second arithmetic sequence can be represented as b j =b0 + j × d = (i-1) × K / 2 - 1 + j × 1, where b0 represents the initial term of the second arithmetic sequence, which is (i-1) × K / 2 - 1; d represents the common difference, which is 1; b j This represents the value of the j-th term in the second arithmetic sequence, which can be understood as the j-th offset value. The third arithmetic sequence can be represented as... In the formula, c0 represents the first term of the third arithmetic sequence, which is... d represents the tolerance, which is 1; c s The value of the s-th term in the third arithmetic sequence can be understood as the j-th offset value, where s is a positive integer starting from 1, and s is equivalent to the term index of the third arithmetic sequence; the relationship between j and s is: s = jK / 2. The third arithmetic sequence can also be represented based on j, that is,

[0135] In summary, the method provided in this application illustrates another way of partitioning antenna ports. The resulting antenna port group includes sequential but not contiguous antenna ports. The network device and the terminal device pre-agree on the antenna port partitioning method, meaning that the partitioning of antenna ports by the terminal device and the network device is consistent. In this case, the terminal device reports CSI information to the network device based on the channel measurement results on the antenna port group. The network device then determines the precoding on the antenna port group based on the CSI information reported by the terminal device, thereby ensuring that the final precoding implemented on the antenna port group matches the channel on that antenna port group.

[0136] It should be noted that whether the antenna ports are divided in a continuous or discontinuous manner depends on the mapping method from the network device's antenna array to the antenna ports. For example, whether to map antenna ports in one polarization direction first, and then antenna ports in another polarization direction, or to map antenna ports in one antenna panel first, and then antenna ports in another antenna panel. This mapping method is generally agreed upon in advance between the network device and the terminal device.

[0137] Indication Form Two: Indicates whether the antenna port groups correspond to the same beam and / or the same intra-group phase.

[0138] In some embodiments, the first information includes at least one of the following: a first bit information, used to indicate whether multiple antenna port groups correspond to the same beam and / or the same intra-group phase; a second bit information and a third bit information, the second bit information being used to indicate whether multiple antenna port groups correspond to the same beam and the third bit information being used to indicate whether multiple antenna port groups correspond to the same intra-group phase; a first bit map, the first bit map being used to indicate antenna port groups among multiple antenna port groups that correspond to the same beam and / or the same intra-group phase; a second bit map and a third bit map, the second bit map being used to indicate antenna port groups among multiple antenna port groups that correspond to the same beam and the third bit map being used to indicate antenna port groups among multiple antenna port groups that correspond to the same intra-group phase. It can be understood that the first information includes at least one of the following: 1 bit information, used to indicate whether multiple antenna port groups correspond to the same beam and / or the same intra-group phase; 2 bits information, wherein 1 bit is used to indicate whether multiple antenna port groups correspond to the same beam and the other bit is used to indicate whether multiple antenna port groups correspond to the same intra-group phase; 1 bit bitmap sequence, used to indicate antenna port groups in the multiple antenna port groups that correspond to the same beam and / or the same intra-group phase; 2 bitmap sequence, wherein 1 sequence is used to indicate antenna port groups in the multiple antenna port groups that correspond to the same beam and the other sequence is used to indicate antenna port groups in the multiple antenna port groups that correspond to the same intra-group phase. Alternatively, the first information may include at least one of the following: a first bit information, used to indicate whether different antenna port groups correspond to the same beam and / or the same intra-group phase; a second bit information and a third bit information, the second bit information used to indicate whether different antenna port groups correspond to the same beam and the third bit information used to indicate whether different antenna port groups correspond to the same intra-group phase; a first bit map, used to indicate antenna port groups among multiple antenna port groups that correspond to the same beam and / or the same intra-group phase; a second bit map and a third bit map, the second bit map used to indicate antenna port groups among multiple antenna port groups that correspond to the same beam and the third bit map used to indicate antenna port groups among multiple antenna port groups that correspond to the same intra-group phase.

[0139] 1. Indicated in the form of bit information.

[0140] In some embodiments, when the first information includes a first bit of information (i.e., 1 bit of information), the first information is used to indicate whether multiple antenna port groups correspond to the same beam; or, the first information is used to indicate whether multiple antenna port groups correspond to the same intra-group phase; or, the first information is used to indicate whether multiple antenna port groups correspond to the same beam and the same intra-group phase; alternatively, the first information is used to indicate whether different antenna port groups correspond to the same beam; or, the first information is used to indicate whether different antenna port groups correspond to the same intra-group phase; or, the first information is used to indicate whether different antenna port groups correspond to the same beam and the same intra-group phase.

[0141] In some embodiments, the first information includes a second bit of information and a third bit of information (i.e., 2 bits of information). The second bit of information is used to indicate whether multiple antenna port groups correspond to the same beam, the third bit of information is used to indicate whether multiple antenna port groups correspond to the same intra-group phase, and the first information is used to indicate whether multiple antenna port groups correspond to the same beam and the same intra-group phase. Alternatively, the second bit of information is used to indicate whether different antenna port groups correspond to the same beam, the third bit of information is used to indicate whether different antenna port groups correspond to the same intra-group phase, and the first information is used to indicate whether different antenna port groups correspond to the same beam and the same intra-group phase.

[0142] The 1.1-bit information indicates that multiple antenna port groups use independent beams.

[0143] In some embodiments, the multiple antenna port groups include q antenna port groups, meaning the network device is configured with q antenna port groups. When the first information indicates that the multiple antenna port groups correspond to independent beams, or when the first information indicates that different antenna port groups correspond to independent beams, step 220-2 above includes: reporting second beam information to the network device. The second beam information includes q beam information, and there is a one-to-one correspondence between the q beam information and the q antenna port groups using independent beams. That is, when the first information indicates that the q antenna port groups correspond to independent beams, the terminal device reports q beam information to the network device. In this case, it can also be said that the second beam information includes the beam information corresponding to each of the q antenna port groups. Here, an independent beam (or independent beam) means that the beam can be independently determined. In this case, the beams corresponding to different antenna port groups need to be indicated independently, that is, different antenna port groups correspond to their own beam information. It can also be understood that there is a one-to-one correspondence between the antenna port groups and the beam information, but the beams indicated by different beam information can be the same or different.

[0144] For example, the first bit information is used to indicate whether multiple antenna port groups correspond to the same beam (and the same intra-group phase). When the first bit information is 1, it indicates that the first bit information indicates that multiple antenna port groups correspond to the same beam (and the same intra-group phase); when the first bit information is 0, it indicates that the first bit information indicates that multiple antenna port groups correspond to independent beams (and the same intra-group phase). Therefore, the scenario where the first bit information indicates that multiple antenna port groups correspond to independent beams is when the first bit information is 0. The second bit information is used to indicate whether multiple antenna port groups correspond to the same beam. When the second bit information is 1, it indicates that the second bit information indicates that multiple antenna port groups correspond to the same beam; when the second bit information is 0, it indicates that the second bit information indicates that multiple antenna port groups correspond to independent beams. Therefore, the scenario where the first bit information indicates that multiple antenna port groups correspond to independent beams is when the second bit information is 0.

[0145] As an example, and not a limitation, multiple antenna port groups include 8 antenna port groups, i.e., q = 8. Taking the above explanation of the meaning of the values ​​of the first and second bits as an example, if the first information includes the first bit (i.e., using 1 bit), and the first bit is 0, it indicates that the 8 antenna port groups correspond to independent beams. In this case, the terminal device needs to report the second beam information, which includes the information of 8 beams, to the network device. If the first information includes the second and third bits (i.e., using 2 bits), and the second bit is 0, it indicates that the 8 antenna port groups correspond to independent beams. In this case, the terminal device needs to report the second beam information, which includes the information of 8 beams, to the network device.

[0146] It should be noted that the meanings of the above bit information being set to "0" and "1" can be opposite. For example, when the first bit information is 1, it means that the first bit information indicates that multiple antenna port groups correspond to independent beams (and independent intra-group phases). When the first bit information is 0, it means that the first bit information indicates that multiple antenna port groups correspond to the same beam (and the same intra-group phase), and so on. This will not be elaborated further here.

[0147] Optionally, beam information can be indicated by a beam index and a beam offset. That is, the second beam information includes a reference beam index and a beam offset. The reference beam index is the beam index corresponding to a reference antenna port group among the q antenna port groups. The beam offset indicates the offset of the beam index of the first antenna port group among the q antenna port groups relative to the reference beam index. The first antenna port group is the antenna port group among the q antenna port groups excluding the reference antenna port group. For example, the reference antenna port group is the antenna port group with the lowest beam index among the q antenna port groups; or, the reference antenna port group is the first antenna port group among the q antenna port groups configured in the network device.

[0148] As an example, and not a limitation, the second beam information includes one reference beam index and q-1 beam offsets. That is, the q-1 beam offsets correspond one-to-one with q-1 first antenna port groups. The beam offset of each first antenna port group is used to determine its beam index in conjunction with the reference beam index. Alternatively, the second beam information includes one reference beam index and one beam offset. That is, the beam indices of all q-1 first antenna port groups can be determined based on the reference beam index and the beam offset. For example, if the beam indices of the antenna port groups satisfy an arithmetic sequence, the beam offset is the common difference of this arithmetic sequence, and the reference beam index is the initial term (or initial value) of this arithmetic sequence.

[0149] In some embodiments, the second beam information is reported using differential reporting. For example, 6 bits of signaling are used to indicate the reference beam index, and 2 bits of signaling are used to indicate the beam offset. This method reduces the overhead of beam information reporting compared to using q six-bit signaling signals to indicate the beam index of each antenna port group. Differential reporting is an overhead-reducing information reporting method. Differential reporting reduces overhead by reporting an initial reference and one or more differential values ​​(or difference values, offset values), wherein the overhead of the differential values ​​is less than the overhead of the initial reference (e.g., using different sizes of bit signaling).

[0150] In some embodiments, the second beam information further includes reference antenna port group indication information, which is used to indicate a reference antenna port group. Optionally, the reference antenna port group indication information is an identifier / index of the reference antenna port group. By setting a separate indication information to indicate the reference antenna port group, it is easier to obtain the beam indices of other antenna port groups based on the beam index of that reference antenna port group, thereby realizing a method for representing beam information based on reference beam indices and beam offsets.

[0151] In some embodiments, the plurality of antenna port groups includes q antenna port groups. When the first information indicates that the plurality of antenna port groups correspond to independent beams, step 320-2 above includes: receiving second beam information reported by the terminal device, the second beam information including q beam information, and a one-to-one correspondence between the q beam information and the q antenna port groups using independent beams.

[0152] The 1.2-bit information indicates that multiple antenna port groups use the same beam.

[0153] In some embodiments, the multiple antenna port groups include q antenna port groups, meaning the network device is configured with q antenna port groups. When the first information indicates that multiple antenna port groups correspond to the same beam, or when the first information indicates that different antenna port groups correspond to the same beam, step 220-2 includes: reporting third beam information to the network device. This third beam information is used to indicate that the q antenna port groups correspond to the same beam. That is, when the first information indicates that the q antenna port groups correspond to the same beam, the terminal device reports one beam information to the network device. Here, "same beam" means that different antenna port groups only need a common beam and do not require separate indication; that is, different antenna port groups correspond to the same beam information.

[0154] For example, the first bit information is used to indicate whether multiple antenna port groups correspond to the same beam (and the same intra-group phase). When the first bit information is 1, it indicates that the first bit information indicates that multiple antenna port groups correspond to the same beam (and the same intra-group phase); when the first bit information is 0, it indicates that the first bit information indicates that multiple antenna port groups correspond to independent beams (and independent intra-group phases). Therefore, the scenario where the first information indicates that multiple antenna port groups correspond to the same beam is when the first bit information is 1. The second bit information is used to indicate whether multiple antenna port groups correspond to the same beam. When the second bit information is 1, it indicates that the second bit information indicates that multiple antenna port groups correspond to the same beam; when the second bit information is 0, it indicates that the second bit information indicates that multiple antenna port groups correspond to independent beams. Therefore, the scenario where the first information indicates that multiple antenna port groups correspond to the same beam is when the second bit information is 1.

[0155] As an example, and not a limitation, multiple antenna port groups include 8 antenna port groups, i.e., q = 8. Taking the above explanation of the meaning of the values ​​of the first and second bits as an example, if the first information includes the first bit (i.e., using 1 bit information) and the first bit is 1, it indicates that the 8 antenna port groups correspond to the same beam, and the terminal device needs to report 1 beam information (i.e., the third beam information) to the network device. If the first information includes both the second and third bits (i.e., using 2 bits information), and the second bit is 1, it indicates that the 8 antenna port groups correspond to the same beam, and the terminal device needs to report 1 beam information (i.e., the third beam information) to the network device.

[0156] In some embodiments, the plurality of antenna port groups includes q antenna port groups. When the first information indicates that the plurality of antenna port groups correspond to the same beam, step 320-2 above includes: receiving third beam information reported by the terminal device, the third beam information indicating that the q antenna port groups correspond to the same beam.

[0157] The 1.3-bit information indicates that multiple antenna port groups use independent intra-group phases.

[0158] In some embodiments, the multiple antenna port groups include q antenna port groups, meaning the network device is configured with q antenna port groups. When the first information indicates that the multiple antenna port groups correspond to independent intra-group phases, or when the first information indicates that different antenna port groups correspond to independent intra-group phases, step 220-2 above includes: reporting second phase information to the network device. The second phase information includes q phase information, and there is a one-to-one correspondence between the q phase information and the q antenna port groups using independent intra-group phases. That is, when the first information indicates that the q antenna port groups correspond to independent intra-group phases, the terminal device reports q phase information to the network device. In this case, it can also be said that the second phase information includes the phase information corresponding to each of the q antenna port groups. Here, independent intra-group phase (or independent intra-group phase) means that the intra-group phase can be determined independently. In this case, the intra-group phases corresponding to different antenna port groups need to be indicated independently, meaning different antenna port groups correspond to their own phase information. This can also be understood as a one-to-one correspondence between antenna port groups and beam information, but the intra-group phases indicated by different phase information can be the same or different.

[0159] For example, the first bit information is used to indicate whether multiple antenna port groups correspond to the same intra-group phase (and the same beam). When the first bit information is 1, it indicates that the first bit information indicates that multiple antenna port groups correspond to the same intra-group phase (and the same beam); when the first bit information is 0, it indicates that the first bit information indicates that multiple antenna port groups correspond to independent intra-group phases (and independent beams). Therefore, the scenario where the first bit information indicates that multiple antenna port groups correspond to independent intra-group phases is when the first bit information is 0. The third bit information is used to indicate whether multiple antenna port groups correspond to the same intra-group phase. When the third bit information is 1, it indicates that the third bit information indicates that multiple antenna port groups correspond to the same intra-group phase; when the third bit information is 0, it indicates that the third bit information indicates that multiple antenna port groups correspond to independent intra-group phases. Therefore, the scenario where the first bit information indicates that multiple antenna port groups correspond to independent intra-group phases is when the third bit information is 0.

[0160] As an example, and not a limitation, multiple antenna port groups include 8 antenna port groups, i.e., q = 8. Taking the above explanation of the meaning of the first and third bit information values ​​as an example, if the first information includes the first bit information (i.e., using 1 bit information) and the first bit information is 0, it indicates that the 8 antenna port groups correspond to independent intra-group phases. In this case, the terminal device needs to report second phase information including 8 phase information to the network device. If the first information includes both the second and third bits information (i.e., using 2 bits information), and the third bit information is 0, it indicates that the 8 antenna port groups correspond to independent intra-group phases. In this case, the terminal device needs to report second phase information including 8 phase information to the network device.

[0161] In some embodiments, the q phase information indicated in the second phase information is the phase information described in the CSI information above. The meaning and indication method of the phase information will not be repeated here.

[0162] In some embodiments, the plurality of antenna port groups includes q antenna port groups. When the first information indicates that the plurality of antenna port groups correspond to independent intra-group phases, step 320-2 above includes: receiving second phase information reported by the terminal device, the second phase information including q phase information, and a one-to-one correspondence between the q phase information and the q antenna port groups using independent intra-group phases.

[0163] The 1.4-bit information indicates that multiple antenna port groups use the same intra-group phase.

[0164] In some embodiments, the multiple antenna port groups include q antenna port groups, meaning the network device is configured with q antenna port groups. When the first information indicates that multiple antenna port groups correspond to the same intra-group phase, or when the first information indicates that different antenna port groups correspond to the same intra-group phase, step 220-2 includes: reporting third phase information to the network device, the third phase information indicating that the q antenna port groups correspond to the same intra-group phase. That is, when the first information indicates that the q antenna port groups correspond to the same intra-group phase, the terminal device reports one phase information to the network device. Here, "same intra-group phase" means that different antenna port groups only need a common intra-group phase and do not need to be individually indicated; that is, different antenna port groups correspond to the same phase information.

[0165] For example, the first bit information is used to indicate whether multiple antenna port groups correspond to the same intra-group phase (and the same beam). When the first bit information is 1, it indicates that the first bit information indicates that multiple antenna port groups correspond to the same intra-group phase (and the same beam); when the first bit information is 0, it indicates that the first bit information indicates that multiple antenna port groups correspond to independent intra-group phases (and independent beams). Therefore, the scenario where the first bit information indicates that multiple antenna port groups correspond to the same intra-group phase is when the first bit information is 1. The third bit information is used to indicate whether multiple antenna port groups correspond to the same intra-group phase. When the third bit information is 1, it indicates that the third bit information indicates that multiple antenna port groups correspond to the same intra-group phase; when the third bit information is 0, it indicates that the third bit information indicates that multiple antenna port groups correspond to independent intra-group phases. Therefore, the scenario where the first bit information indicates that multiple antenna port groups correspond to the same intra-group phase is when the third bit information is 1.

[0166] As an example, and not a limitation, multiple antenna port groups include 8 antenna port groups, i.e., q = 8. Taking the above explanation of the meaning of the values ​​of the first and third bits as an example, if the first information includes the first bit (i.e., using 1 bit information) and the first bit information is 1, it indicates that the 8 antenna port groups correspond to the same intra-group phase, and the terminal device needs to report 1 phase information (i.e., the third phase information) to the network device. If the first information includes the second and third bits (i.e., using 2 bits information), and the third bit information is 1, it indicates that the 8 antenna port groups correspond to the same intra-group phase, and the terminal device needs to report 1 phase information (i.e., the third phase information) to the network device.

[0167] It should be noted that if a 2-bit information scheme is adopted (i.e., the case of using the second and third bits of information), but only one bit of information is used as in 1.1 to 1.4 above, the unused bit information can be set to null or default, etc., and this application embodiment does not limit this.

[0168] In some embodiments, the plurality of antenna port groups includes q antenna port groups. When the first information indicates that the plurality of antenna port groups correspond to the same intra-group phase, step 320-2 above includes: receiving third phase information reported by the terminal device, the third phase information being used to indicate the same intra-group phase corresponding to the q antenna port groups.

[0169] The 1.5-bit information indicates that multiple antenna port groups use independent beams and independent intra-group phases.

[0170] In some embodiments, the multiple antenna port groups include q antenna port groups, meaning the network device is configured with q antenna port groups. When the first information indicates that the multiple antenna port groups correspond to independent beams and independent intra-group phases, or when the first information indicates that different antenna port groups correspond to independent beams and independent intra-group phases, step 220-2 above includes: reporting second beam information and second phase information to the network device. The second beam information includes q beam information, and there is a one-to-one correspondence between the q beam information and the q antenna port groups using independent beams; the second phase information includes q phase information, and there is a one-to-one correspondence between the q phase information and the q antenna port groups using independent intra-group phases. That is, when the first information indicates that the q antenna port groups correspond to independent beams and independent intra-group phases, the terminal device reports q beam information and q phase information to the network device. Independent beams (or independent phases) and independent intra-group phases (or independent intra-group phases) mean that the beams can be determined independently and the intra-group phases can also be determined independently. In this case, the beams corresponding to different antenna port groups need to be indicated independently, and the intra-group phases corresponding to different antenna port groups also need to be indicated independently. That is, different antenna port groups correspond to their own beam information and intra-group phases. It can also be understood that there is a one-to-one correspondence between antenna port groups and beam information, and a one-to-one correspondence between antenna port groups and phase information. However, the beams indicated by different beam information can be the same or different, and the intra-group phases indicated by different phase information can be the same or different.

[0171] For example, the first bit information is used to indicate whether multiple antenna port groups correspond to the same beam and the same intra-group phase. When the first bit information is 1, it indicates that the multiple antenna port groups correspond to the same beam and the same intra-group phase; when the first bit information is 0, it indicates that the multiple antenna port groups correspond to independent beams and independent intra-group phases. Therefore, the scenario where the first bit information indicates that multiple antenna port groups correspond to independent beams and independent intra-group phases is when the first bit information is 0. The second bit information is used to indicate whether multiple antenna port groups correspond to the same beam. When the second bit information is 1, it indicates that the multiple antenna port groups correspond to the same beam; when the second bit information is 0, it indicates that the multiple antenna port groups correspond to independent beams. The third bit information is used to indicate whether multiple antenna port groups correspond to the same intra-group phase. When the third bit information is 1, it indicates that the multiple antenna port groups correspond to the same intra-group phase; when the third bit information is 0, it indicates that the multiple antenna port groups correspond to independent intra-group phases. The first information indicates that the scenarios corresponding to the independent beams and independent phases within the multiple antenna port groups are that the second bit information is 0 and the third bit information is 0.

[0172] As an example, and not a limitation, multiple antenna port groups include 8 antenna port groups, i.e., q = 8. Taking the above explanation of the meaning of the values ​​of the first, second, and third bits as an example, if the first information includes the first bit (i.e., using 1 bit), and the first bit is 0, it indicates that the 8 antenna port groups correspond to independent beams and independent intra-group phases. In this case, the terminal device needs to report second beam information including 8 beams and second phase information including 8 phases to the network device. If the first information includes the second and third bits (i.e., using 2 bits), and both the second and third bits are 0, it indicates that the 8 antenna port groups correspond to independent beams and independent intra-group phases. In this case, the terminal device needs to report second beam information including 8 beams and second phase information including 8 phases to the network device.

[0173] The specific reporting method for the second beam information is described in the above "1.1-bit information indicates that multiple antenna port groups use different beams", and will not be repeated here.

[0174] In some embodiments, the plurality of antenna port groups includes q antenna port groups. When the first information indicates that the plurality of antenna port groups correspond to independent beams and independent intra-group phases, step 320-2 above includes: receiving second beam information and second phase information reported by the terminal device, wherein the second beam information includes q beam information, and there is a one-to-one correspondence between the q beam information and the q antenna port groups using independent beams; the second phase information includes q phase information, and there is a one-to-one correspondence between the q phase information and the q antenna port groups using independent intra-group phases.

[0175] The 1.6-bit information indicates that multiple antenna port groups use the same beam and the same intra-group phase.

[0176] In some embodiments, the multiple antenna port groups include q antenna port groups, meaning the network device is configured with q antenna port groups. When the first information indicates that multiple antenna port groups correspond to the same beam and the same intra-group phase, or when the first information indicates that different antenna port groups correspond to the same beam and the same intra-group phase, step 220-2 includes: reporting third beam information and third phase information to the network device. The third beam information is used to indicate a common beam corresponding to the q antenna port groups, and the third phase information is used to indicate a common intra-group phase corresponding to the q antenna port groups. That is, when the first information indicates that the q antenna port groups correspond to independent beams and independent intra-group phases, the terminal device reports one beam information and one phase information to the network device. Here, "same beam and same intra-group phase" means that different antenna port groups only need a common beam and intra-group phase, and do not need to be individually indicated; that is, different antenna port groups correspond to the same beam information and phase information.

[0177] For example, the first bit information is used to indicate whether multiple antenna port groups correspond to the same beam and the same intra-group phase. When the first bit information is 1, it indicates that the multiple antenna port groups correspond to the same beam and the same intra-group phase; when the first bit information is 0, it indicates that the multiple antenna port groups correspond to independent beams and independent intra-group phases. Therefore, the scenario where the first bit information indicates that multiple antenna port groups correspond to the same beam and the same intra-group phase is when the first bit information is 1. The second bit information is used to indicate whether multiple antenna port groups correspond to the same beam. When the second bit information is 1, it indicates that the multiple antenna port groups correspond to the same beam; when the second bit information is 0, it indicates that the multiple antenna port groups correspond to independent beams. The third bit information is used to indicate whether multiple antenna port groups correspond to the same intra-group phase. When the third bit information is 1, it indicates that the multiple antenna port groups correspond to the same intra-group phase; when the third bit information is 0, it indicates that the multiple antenna port groups correspond to independent intra-group phases. The first information indicates that the scenario corresponding to the same beam and the same intra-group phase for multiple antenna port groups is that the second bit information is 1 and the third bit information is 1.

[0178] As an example, and not a limitation, multiple antenna port groups include 8 antenna port groups, i.e., q = 8. Taking the above explanation of the meaning of the values ​​of the first, second, and third bits as an example, if the first information includes the first bit (i.e., using 1 bit), and the first bit is 1, it indicates that the 8 antenna port groups correspond to the same beam and the same intra-group phase. In this case, the terminal device needs to report 1 beam information (i.e., the third beam information) and 1 phase information (i.e., the third phase information) to the network device. If the first information includes the second and third bits (i.e., using 2 bits), and both the second and third bits are 1, it indicates that the 8 antenna port groups correspond to the same beam and the same intra-group phase. In this case, the terminal device needs to report 1 beam information (i.e., the third beam information) and 1 phase information (i.e., the third phase information) to the network device.

[0179] In some embodiments, the plurality of antenna port groups includes q antenna port groups. When the first information indicates that the plurality of antenna port groups correspond to the same beam and the same intra-group phase, step 320-2 above includes: reporting third beam information and third phase information to the network device, wherein the third beam information is used to indicate a common beam corresponding to the q antenna port groups, and the third phase information is used to indicate a common intra-group phase corresponding to the q antenna port groups.

[0180] In summary, the method provided in this application uses bit information to indicate whether the corresponding antenna ports use the same beam and / or the same intra-group phase. Only 1 or 2 bits are needed for this indication, resulting in low signaling overhead. Furthermore, the network device pre-configures multiple antenna port groups, and the terminal device is responsible for determining whether these antenna port groups use the same beam and / or the same intra-group phase. This allows the terminal device to determine whether to use the same beam and / or the same intra-group phase based on the downlink channel state, improving feedback accuracy. Moreover, the improved feedback accuracy further reduces the high signaling overhead caused by erroneous feedback (e.g., in scenarios where only the same beam is needed, an independent beam is used due to erroneous feedback, leading to increased CSI information).

[0181] 2. Indicated in the form of a bitmap.

[0182] In some embodiments, when the first information includes a first bitmap (i.e., a 1-bit bitmap sequence), the first information is used to indicate antenna port groups corresponding to the same beam among multiple antenna port groups; or, the first information is used to indicate antenna port groups corresponding to the same intra-group phase among multiple antenna port groups; or, the first information is used to indicate antenna port groups corresponding to both the same beam and the same intra-group phase among multiple antenna port groups. Alternatively, the first information can be used to indicate antenna port groups corresponding to independent beams among multiple antenna port groups; or, the first information can be used to indicate antenna port groups corresponding to independent intra-group phases among multiple antenna port groups; or, the first information can be used to indicate antenna port groups corresponding to both independent beams and independent intra-group phases among multiple antenna port groups. Alternatively, the first information can be used to indicate the first antenna port group set and the second antenna port group set, where the antenna port groups in the first antenna port group set correspond to the same beam, the antenna port groups in the second antenna port group set correspond to the same beam, and the first antenna port group set and the second antenna port group set correspond to independent beams; or, the first information can be used to indicate the first antenna port group set and the second antenna port group set, where the antenna port groups in the first antenna port group set correspond to the same intra-group phase, the antenna port groups in the second antenna port group set correspond to the same intra-group phase, and the first antenna port group set and the second antenna port group set correspond to independent intra-group phases; or, the first information can be used to indicate the first antenna port group set and the second antenna port group set, where the antenna port groups in the first antenna port group set correspond to the same beam and the same intra-group phase, the antenna port groups in the second antenna port group set correspond to the same beam and the same intra-group phase, and the first antenna port group set and the second antenna port group set correspond to independent beams and independent intra-group phases.

[0183] In some embodiments, when the first information includes a second bitmap and a third bitmap (i.e., a 2-bit bitmap sequence), the second bitmap is used to indicate antenna port groups corresponding to the same beam among multiple antenna port groups, the third bitmap is used to indicate antenna port groups corresponding to the same intra-group phase among multiple antenna port groups, and the first information is used to indicate antenna port groups corresponding to the same beam and the same intra-group phase among multiple antenna port groups. Alternatively, the first information is used to indicate the third, fourth, fifth, and sixth antenna port group sets; the second bit map is used to indicate the third and fourth antenna port group sets, where the antenna port groups in the third antenna port group set correspond to the same beam, the antenna port group sets in the fourth antenna port group set correspond to the same beam, and the third and fourth antenna port group sets correspond to independent beams; the third bit map is used to indicate the fifth and sixth antenna port group sets, where the antenna port groups in the fifth antenna port group set correspond to the same intra-group phase, the antenna port groups in the sixth antenna port group set correspond to the same intra-group phase, and the fifth and sixth antenna port group sets correspond to independent intra-group phases.

[0184] In some embodiments, each bit in the bitmap corresponds to an antenna port group. That is, in the case of multiple antenna port groups including q antenna port groups, the first bitmap, the second bitmap, and the third bitmap all have q bits. It should be noted that the correspondence between each bit and the antenna port group is pre-agreed upon by the terminal device and the network device.

[0185] The 2.1 bitmap indicates antenna port groups that use the same beam across multiple antenna port groups.

[0186] In some embodiments, the first information is used to indicate that the antenna port groups in the first antenna port group set correspond to the same beam, and the antenna port groups in the second antenna port group set correspond to the same beam, and the first antenna port group set and the second antenna port group set correspond to independent beams; step 220-2 includes: reporting fourth beam information to the network device, the fourth beam information being used to indicate the beam information corresponding to the first antenna port group set and the beam information corresponding to the second antenna port group set. That is, the terminal device reports two beam information to the network device, one beam information being the beam information corresponding to the antenna port groups in the first antenna port group set, and the other beam information being the beam information corresponding to the antenna port groups in the second antenna port group set.

[0187] For example, the first bitmap is used to indicate antenna port groups using the same beam among multiple antenna port groups. When the bit corresponding to an antenna port group is 1, it indicates that the antenna port group belongs to the first antenna port group set; when the bit corresponding to an antenna port group is 0, it indicates that the antenna port group belongs to the second antenna port group set. The antenna port groups in the first antenna port group set correspond to the same beam, and the antenna port groups in the second antenna port group set correspond to the same beam. The first antenna port group set and the second antenna port group set correspond to independent beams. The second bitmap is used to indicate antenna port groups using the same beam among multiple antenna port groups. When the bit corresponding to an antenna port group is 1, it indicates that the antenna port group belongs to the first antenna port group set; when the bit corresponding to an antenna port group is 0, it indicates that the antenna port group belongs to the second antenna port group set. It should be noted that the meanings of the bit values ​​set to "0" and "1" in the above bit diagram can be opposite. For example, if the bit corresponding to the antenna port group is 1, it means that the antenna port group belongs to the second antenna port group set; if the bit corresponding to the antenna port group is 0, it means that the antenna port group belongs to the first antenna port group set.

[0188] As an example, and not a limitation, multiple antenna port groups include 8 antenna port groups, i.e., q = 8. Taking the above explanation of the meaning of the bit values ​​in the first bitmap and the second bitmap as an example, if the first information includes the first bitmap (i.e., using a 1-bit bitmap sequence) and the first bitmap is 1111 0000, it means that the first 4 antenna port groups (i.e., the 1st to the 4th antenna port groups) belong to the first antenna port group set, and these 4 antenna port groups use the same beam. The last 4 antenna port groups (i.e., the 5th to the 8th antenna port groups) belong to the second antenna port group set, and these 4 antenna port groups use the same beam. The beams of the antenna port groups in the first antenna port group set and the antenna port groups in the second antenna port group set are independently indicated. Therefore, the terminal device needs to report 2 beam information (i.e., the fourth beam information) to the network device. If the first information includes a second bitmap and a third bitmap (i.e., using 2 bits of information), and the second bitmap is 1111 0000, it indicates that the first 4 antenna port groups (i.e., the 1st to 4th antenna port groups) belong to the first antenna port group set, and these 4 antenna port groups use the same beam. The last 4 antenna port groups (i.e., the 5th to 8th antenna port groups) belong to the second antenna port group set, and these 4 antenna port groups use the same beam. The beams of the antenna port groups in the first antenna port group set and the antenna port groups in the second antenna port group set are independently indicated. Therefore, the terminal device needs to report 2 beam information (i.e., the fourth beam information) to the network device.

[0189] Furthermore, the above embodiment uses one bit in the bitmap corresponding to each antenna port group as an example. However, in actual use, multiple antenna port groups can be divided into one antenna port group set, two antenna port group sets, three antenna port group sets, four antenna port group sets, or even more antenna port group sets, depending on the specific scenario. Implementing more antenna port group sets only requires changing the original single-bit scheme to a multi-bit scheme, such as using two bits to indicate the antenna port group set to which an antenna port group belongs. For example, if multiple antenna port groups include q antenna port groups, then the first bitmap includes 2*q bits, with each pair of bits representing an antenna port group. If the two bits corresponding to an antenna port group are "00", it means that the antenna port group belongs to antenna port group set 1; if the two bits corresponding to an antenna port group are "01", it means that the antenna port group belongs to antenna port group set 2; if the two bits corresponding to an antenna port group are "10", it means that the antenna port group belongs to antenna port group set 3; and if the two bits corresponding to an antenna port group are "11", it means that the antenna port group belongs to antenna port group set 4. Other antenna port group sets are similar and will not be elaborated further here. For antenna port group sets of 3 or more (not powers of 2), it is only necessary to agree that no single bit value is used, such as using only "00", "01", and "10". For example, multiple antenna port groups, including 8 antenna port groups, can use a 16-bit bitmap. If the bitmap is 00 01 00 10 11 00 11 10, it means that the 1st, 3rd, and 6th antenna port groups belong to antenna port group set 1, the 2nd antenna port group belongs to antenna port group set 2, the 4th and 8th antenna port groups belong to antenna port group set 3, and the 5th and 7th antenna port groups belong to antenna port group set 4.

[0190] In some embodiments, the first information is used to indicate that the antenna port groups in the first antenna port group set correspond to the same beam, the antenna port groups in the second antenna port group set correspond to the same beam, and the first antenna port group set and the second antenna port group set correspond to independent beams; step 320-2 includes: receiving fourth beam information reported by the terminal device, the fourth beam information being used to indicate the beam information corresponding to the first antenna port group set and the beam information corresponding to the second antenna port group set.

[0191] The 2.2-bit bitmap indicates antenna port groups that use the same intra-group phase among multiple antenna port groups.

[0192] In some embodiments, the first information is used to indicate that the antenna port groups in the first antenna port group set correspond to the same intra-group phase, and the antenna port groups in the second antenna port group set correspond to the same intra-group phase, and the first antenna port group set and the second antenna port group set correspond to independent intra-group phases; step 220-2 includes: reporting fourth phase information to the network device, the fourth phase information being used to indicate the phase information corresponding to the first antenna port group set and the phase information corresponding to the second antenna port group set. That is, the terminal device reports two phase information to the network device, one phase information being the phase information corresponding to the antenna port group in the first antenna port group set, and the other phase information being the phase information corresponding to the antenna port group in the second antenna port group set.

[0193] For example, the first bitmap is used to indicate antenna port groups among multiple antenna port groups that use the same intra-group phase. When the bit corresponding to an antenna port group is 1, it indicates that the antenna port group belongs to the first antenna port group set; when the bit corresponding to an antenna port group is 0, it indicates that the antenna port group belongs to the second antenna port group set. The antenna port groups in the first antenna port group set have the same intra-group phase, and the antenna port groups in the second antenna port group set have the same intra-group phase. The first antenna port group set and the second antenna port group set have independent intra-group phases. The third bitmap is used to indicate antenna port groups among multiple antenna port groups that use the same intra-group phase. When the bit corresponding to an antenna port group is 1, it indicates that the antenna port group belongs to the first antenna port group set; when the bit corresponding to an antenna port group is 0, it indicates that the antenna port group belongs to the second antenna port group set.

[0194] As an example, and not a limitation, multiple antenna port groups include 8 antenna port groups, i.e., q = 8. Taking the above explanation of the meaning of the bit values ​​in the first bitmap and the second bitmap as an example, if the first information includes the first bitmap (i.e., using a 1-bit bitmap sequence) and the first bitmap is 1010 1010, it means that the odd-numbered antenna port groups (i.e., the 1st, 3rd, 5th, and 7th antenna port groups) belong to the first antenna port group set, and these 4 antenna port groups use the same intra-group phase. The even-numbered antenna port groups (i.e., the 2nd, 4th, 6th, and 8th antenna port groups) belong to the second antenna port group set, and these 4 antenna port groups use the same intra-group phase. The intra-group phases of the antenna port groups in the first antenna port group set and the antenna port groups in the second antenna port group set are independently indicated. Therefore, the terminal device needs to report 2 phase information (i.e., the fourth phase information) to the network device. If the first information includes a second bitmap and a third bitmap (i.e., using 2 bits of information), and the second bitmap is 1010 1010, it indicates that the odd-numbered antenna port groups (i.e., the 1st, 3rd, 5th, and 7th antenna port groups) belong to the first antenna port group set, and these 4 antenna port groups use the same intra-group phase. The even-numbered antenna port groups (i.e., the 2nd, 4th, 6th, and 8th antenna port groups) belong to the second antenna port group set, and these 4 antenna port groups use the same intra-group phase. The intra-group phases of the antenna port groups in the first antenna port group set and the antenna port groups in the second antenna port group set are independently indicated. Therefore, the terminal device needs to report 2 phase information (i.e., the fourth phase information) to the network device. In some embodiments, the first information is used to indicate that the antenna port groups in the first antenna port group set correspond to the same intra-group phase, the antenna port groups in the second antenna port group set correspond to the same intra-group phase, and the first antenna port group set and the second antenna port group set correspond to independent intra-group phases; step 320-2 includes: receiving fourth phase information reported by the terminal device, the fourth phase information being used to indicate the phase information corresponding to the first antenna port group set and the phase information corresponding to the second antenna port group set.

[0195] The 2.3-bit bitmap indicates antenna port groups that use the same beam and the same intra-group phase in multiple antenna port groups.

[0196] In some embodiments, the first information is used to indicate that antenna port groups in the first antenna port group set correspond to the same beam and the same intra-group phase, antenna port groups in the second antenna port group set correspond to the same beam and the same intra-group phase, and the first antenna port group set and the second antenna port group set correspond to independent beams and independent intra-group phases; or, the first information is used to indicate that antenna port groups in the third antenna port group set correspond to the same beam, antenna port groups in the fourth antenna port group set correspond to the same beam, the third antenna port group set and the fourth antenna port group set correspond to independent beams, antenna port groups in the fifth antenna port group set correspond to the same intra-group phase, antenna port groups in the sixth antenna port group set correspond to the same intra-group phase, and the fifth antenna port group set and the sixth antenna port group set correspond to independent intra-group phases. Step 220-2 includes: reporting fourth beam information and fourth phase information to the network device; the fourth beam information is used to indicate the beam information corresponding to the first antenna port group set and the beam information corresponding to the second antenna port group set, and the fourth phase information is used to indicate the phase information corresponding to the first antenna port group set and the phase information corresponding to the second antenna port group set; or, the fourth beam information is used to indicate the beam information corresponding to the third antenna port group set and the beam information corresponding to the fourth antenna port group set, and the fourth phase information is used to indicate the phase information corresponding to the fifth antenna port group set and the phase information corresponding to the sixth antenna port group set.

[0197] For example, the first bit map is used to indicate antenna port groups among multiple antenna port groups that use the same beam and the same intra-group phase. When the bit corresponding to the antenna port group is 1, it indicates that the antenna port group belongs to the first antenna port group set; when the bit corresponding to the antenna port group is 0, it indicates that the antenna port group belongs to the second antenna port group set. The antenna port groups in the first antenna port group set correspond to the same beam and the same intra-group phase, the antenna port groups in the second antenna port group set correspond to the same beam and the same intra-group phase, and the first antenna port group set and the second antenna port group set correspond to independent beams and independent intra-group phases.

[0198] As an example, and not a limitation, multiple antenna port groups include 8 antenna port groups, i.e., q = 8. Taking the above explanation of the meaning of the bit values ​​in the first bitmap as an example, if the first information includes the first bitmap (i.e., using a 1-bit bitmap sequence), and the first bitmap is 1010 1010, it means that the odd-numbered antenna port groups (i.e., the 1st, 3rd, 5th, and 7th antenna port groups) belong to the first antenna port group set. These 4 antenna port groups use the same beam and the same intra-group phase. The even-numbered antenna port groups (i.e., the 2nd, 4th, 6th, and 8th antenna port groups) belong to the second antenna port group set. These 4 antenna port groups use the same beam and the same intra-group phase. The beam and intra-group phase of the antenna port groups in the first antenna port group set and the antenna port groups in the second antenna port group set are independently indicated. Therefore, the terminal device needs to report 2 beam information (i.e., the fourth beam information) and 2 phase information (i.e., the fourth phase information) to the network device.

[0199] For example, the second bitmap is used to indicate antenna port groups using the same beam among multiple antenna port groups. When the bit corresponding to an antenna port group is 1, it indicates that the antenna port group belongs to the third antenna port group set; when the bit corresponding to an antenna port group is 0, it indicates that the antenna port group belongs to the fourth antenna port group set. The antenna port groups in the third antenna port group set correspond to the same beam, the antenna port groups in the fourth antenna port group set correspond to the same beam, and the third and fourth antenna port group sets correspond to independent beams. The third bitmap is used to indicate antenna port groups using the same intra-group phase among multiple antenna port groups. When the bit corresponding to an antenna port group is 1, it indicates that the antenna port group belongs to the fifth antenna port group set; when the bit corresponding to an antenna port group is 0, it indicates that the antenna port group belongs to the sixth antenna port group set. The antenna port groups in the fifth antenna port group set correspond to the same intra-group phase, the antenna port groups in the sixth antenna port group set correspond to the same intra-group phase, and the fifth and sixth antenna port group sets correspond to independent intra-group phases.

[0200] As an example, and not a limitation, multiple antenna port groups include 8 antenna port groups, i.e., q = 8. Taking the above explanation of the meaning of the bit values ​​in the second and third bit diagrams as an example, if the first information includes the second and third bit diagrams (i.e., using 2 bits of information), and the second bit diagram is 1111 0000 and the third bit diagram is 1010 1010, then the second bit diagram indicates that the first 4 antenna port groups (i.e., the 1st to 4th antenna port groups) belong to the first antenna port group set, and these 4 antenna port groups use the same beam. The last 4 antenna port groups (i.e., the 5th to 8th antenna port groups) belong to the second antenna port group set, and these 4 antenna port groups use the same beam. Since the beams of the antenna port groups in the first antenna port group set and the antenna port groups in the second antenna port group set are independently indicated, the terminal device needs to report 2 beam information (i.e., the fourth beam information) to the network device. The third bitmap indicates that the odd-numbered antenna port groups (i.e., antenna port groups 1, 3, 5, and 7) belong to the first antenna port group set, and these four antenna port groups use the same intra-group phase. The even-numbered antenna port groups (i.e., antenna port groups 2, 4, 6, and 8) belong to the second antenna port group set, and these four antenna port groups also use the same intra-group phase. Since the intra-group phases of the antenna port groups in the first and second antenna port group sets are independently indicated, the terminal device needs to report two phase information (i.e., the fourth phase information) to the network device. In summary, the terminal device needs to report two beam information (i.e., the fourth beam information) and two phase information (i.e., the fourth phase information) to the network device.

[0201] In some embodiments, the first information is used to indicate that antenna port groups in the first antenna port group set correspond to the same beam and the same intra-group phase, antenna port groups in the second antenna port group set correspond to the same beam and the same intra-group phase, and the first antenna port group set and the second antenna port group set correspond to independent beams and independent intra-group phases; or, the first information is used to indicate that antenna port groups in the third antenna port group set correspond to the same beam, antenna port groups in the fourth antenna port group set correspond to the same beam, the third antenna port group set and the fourth antenna port group set correspond to independent beams, antenna port groups in the fifth antenna port group set correspond to the same intra-group phase, antenna port groups in the sixth antenna port group set correspond to the same intra-group phase, and the fifth antenna port group set and the sixth antenna port group set correspond to independent intra-group phases. Step 320-2 includes: receiving fourth beam information and fourth phase information reported by the terminal device; the fourth beam information is used to indicate the beam information corresponding to the first antenna port group set and the beam information corresponding to the second antenna port group set, and the fourth phase information is used to indicate the phase information corresponding to the first antenna port group set and the phase information corresponding to the second antenna port group set; or, the fourth beam information is used to indicate the beam information corresponding to the third antenna port group set and the beam information corresponding to the fourth antenna port group set, and the fourth phase information is used to indicate the phase information corresponding to the fifth antenna port group set and the phase information corresponding to the sixth antenna port group set.

[0202] In summary, the method provided in this application uses a bitmap to indicate antenna port groups with the same beam and / or the same intra-group phase among multiple antenna port groups. Although the signaling overhead is relatively large, it can more clearly indicate the beam and / or intra-group phase settings of antenna port groups. Multiple antenna port groups are pre-configured by the network device, and the terminal device is responsible for determining whether these antenna port groups use the same beam and / or the same intra-group phase. This also allows the terminal device to determine whether to use the same beam and / or the same intra-group phase based on the downlink channel state, thus improving the accuracy of feedback. Furthermore, the improved feedback accuracy can further reduce the high signaling overhead caused by erroneous feedback (e.g., in scenarios where only the same beam is needed, an independent beam is used due to erroneous feedback, leading to an increase in CSI information).

[0203] It should be noted that, in indication form two, although multiple antenna port groups are pre-configured by the network device, the network device can also use the above-described "division method one" and "division method two" to divide the antenna port groups when configuring them. This application embodiment does not limit this.

[0204] It should be noted that the antenna port groups using independent beams refer to antenna port groups whose beam information needs to be indicated independently (or separately); antenna port groups using independent intra-group phases refer to antenna port groups whose phase information needs to be indicated independently (or separately). That is, corresponding to independent beams and / or independent intra-group phases can also be referred to as corresponding to different beam information and / or different phase information, and corresponding to the same beam and / or the same intra-group phase can also be referred to as corresponding to the same beam information and / or the same phase information. Therefore, antenna port groups using independent beams and / or independent intra-group phases can also be said to be antenna port groups corresponding to different beam information and / or different phase information; whether multiple antenna port groups use the same beam and / or the same intra-group phase can also be said to be whether multiple antenna port groups use the same beam information and / or the same phase information. Different antenna port groups using the same beam and / or the same intra-group phase means that different antenna port groups use the same beam information and / or the same phase information. Different antenna port groups using independent beams and / or independent intra-group phases mean that different antenna port groups use different beam information and / or different phase information. It can also be said that multiple antenna port groups use different beam information and / or different phase information. Furthermore, the aforementioned antenna port group using independent beams is equivalent to an antenna port group using independent beams; an antenna port group using independent intra-group phases is equivalent to an antenna port group using independent intra-group phases; an antenna port group using independent beams and intra-group phases is equivalent to an antenna port group using independent beams and independent intra-group phases, and is also equivalent to an antenna port group using independent beams and intra-group phases; using independent beams is equivalent to using independent beams; using independent intra-group phases is equivalent to using independent intra-group phases; using independent beams and intra-group phases is equivalent to using independent beams and independent intra-group phases, and is also equivalent to using independent beams and intra-group phases. This application does not limit the scope of the embodiments.

[0205] In some embodiments, in addition to reporting the first information, the terminal device also determines the available antenna port groups and unavailable antenna port groups in the antenna port group based on the measured downlink channel information.

[0206] In an optional embodiment based on Figure 3, the method further includes: the terminal device reporting second information to the network device, the second information being reported in the same CSI section as the first information; wherein the second information is used to indicate available and / or unavailable antenna port groups among the antenna port groups determined according to the first information or multiple antenna port groups configured by the network device; or, the second information is used to indicate a first type antenna port group and / or a second type antenna port group among the antenna port groups determined according to the first information or multiple antenna port groups configured by the network device, the first type antenna port group being an antenna port group that supports transmission, and the second type antenna port group being an antenna port group that does not support transmission; or, the second information is used to indicate antenna port groups that support transmission and / or antenna port groups that do not support transmission among the antenna port groups determined according to the first information or multiple antenna port groups configured by the network device.

[0207] That is, based on the downlink measurement information obtained from the measurement, the terminal device divides the antenna port group determined according to the first information or the downlink antenna ports configured by the network device or the multiple antenna port groups configured by the network device into second information. The second information is used to indicate the available and unavailable antenna port groups among the multiple antenna port groups configured by the network device, or, the second information is used to indicate the available and unavailable antenna ports among the downlink antenna ports configured by the network device (i.e., the aforementioned N downlink antenna ports), or, the second information is used to indicate the available and unavailable antenna port groups among the antenna port groups determined according to the first information.

[0208] For example, the second information is reported using a bitmap. If multiple antenna port groups include q antenna port groups, the second information uses a bitmap of q bits, where each bit represents an antenna port group. When the bit corresponding to an antenna port group is 1, it indicates that the antenna port group is available; when the bit corresponding to an antenna port group is 0, it indicates that the antenna port group is unavailable. The meanings of the bit values ​​"0" and "1" can also be opposite; for example, when the bit corresponding to an antenna port group is 1, it indicates that the antenna port group is unavailable; when the bit corresponding to an antenna port group is 0, it indicates that the antenna port group is available.

[0209] In some embodiments, the first information and the second information are reported independently in the CSI section; or, the first information and the second information are jointly encoded and reported in the CSI section.

[0210] Independent reporting refers to reporting the first and second information as two parts of the CSI (Content Component Information) section. The CSI section includes information elements corresponding to the first and second information, and each information element can be reported using independent channels and coding methods. Joint coding reporting refers to combining the first and second information, performing joint coding, and then reporting it in the CSI section. Independent reporting is simple but has high overhead, suitable for scenarios with fewer information elements; joint coding reporting is efficient but complex, suitable for scenarios with more information elements or high real-time requirements. The design for reporting the first and second information supports reporting the first and second information under different scenarios to achieve information feedback.

[0211] In some embodiments, the terminal device only reports CSI information for available antenna port groups; alternatively, the terminal device does not report CSI information for unavailable antenna port groups. Optionally, the terminal device only reports beam information for available antenna port groups; or, the terminal device only reports phase information for available antenna port groups; or, the terminal device only reports both beam and phase information for available antenna port groups; or, the terminal device does not report beam information for unavailable antenna port groups; or, the terminal device does not report phase information for unavailable antenna port groups; or, the terminal device does not report both beam and phase information for unavailable antenna port groups. Reporting only CSI information for available antenna port groups can save signaling overhead.

[0212] In some embodiments, in scenarios where the terminal device reports second information, the reference antenna port group mentioned in "Indication Form Two" above is an available antenna port group; or in other words, the reference antenna port group needs to be indicated as an available antenna port group. That is, ensuring the reference antenna port group is an available antenna port group is necessary to guarantee the determination of the beam indices of other antenna port groups based on the reference beam index and beam offset of the reference antenna port group. For example, the reference antenna port group may be the first antenna port group among the available antenna port groups.

[0213] In an optional embodiment based on Figure 4, the method further includes: the network device receiving second information reported by the terminal device, the second information being reported in the same CSI section as the first information; wherein the second information is used to indicate the available antenna port group and the unavailable antenna port group among the antenna port groups determined according to the first information or among the multiple antenna port groups configured by the network device.

[0214] In some embodiments, at least one of the length and content of the CSI information is determined based on the first information; wherein the CSI information includes at least one of the following: first beam information, second beam information, third beam information, fourth beam information, first phase information, second phase information, third phase information, fourth phase information, and fifth phase information. Alternatively, at least one of the length and content of the CSI information is determined based on the first and second information. The length may also be referred to as information size, number of bits, etc.

[0215] In some embodiments, at least one of the first and second information is reported in the first CSI section; the CSI information is reported in the second CSI section; wherein the CSI information includes at least one of the first beam information, second beam information, third beam information, fourth beam information, first phase information, second phase information, third phase information, fourth phase information, and fifth phase information. That is, the first and second information are reported in the non-discardable CSI section, ensuring that the network device can receive the more important first and second information, thereby determining the content and length of the CSI information based on the content of the first and second information, and this method requires minimal modification to the protocol.

[0216] In summary, the method provided in this application embodiment also allows the terminal device to report second information indicating available and unavailable antenna port groups to the network device. This enables the network device to determine which antenna port groups are available and which are unavailable, ensuring that encoding and transmission are not performed on unavailable antenna port groups, thus avoiding wasted resources and improving the resource utilization of the network device. Furthermore, after indicating the second information, the terminal device only reports CSI information for available antenna port groups, which also saves on the terminal device's overhead. In addition, determining the length and content of the CSI information based on the first information, such as the number indicated by the first information rather than the number of antenna port groups, can save on the overall overhead of the terminal device.

[0217] Since the first information has two indication forms, the following section will introduce the complete interaction process between the terminal device and the network device under different indication forms.

[0218] Figure 5 shows an overall flowchart of an information reporting method provided in an exemplary embodiment of this application.

[0219] Step 1: The terminal device reports first information to the network device, which indicates the number of antenna port groups using independent beams and / or independent intra-group phases.

[0220] Specifically, the terminal device determines the first information by measuring the downlink reference signal sent by the network device. The downlink reference signal can be a CSI-RS signal used to measure CSI, and the number of ports in the downlink reference signal corresponds to the number of downlink antenna ports configured in the network device. For example, the terminal device can, based on different assumptions about the number of antenna port groups, obtain parameters such as CSI / channel quality / channel capacity corresponding to different assumptions based on downlink channel information, and then select the optimal number of antenna port groups, reporting it to the network device as the first information. In this way, the terminal device can report different numbers of antenna port groups depending on whether the current channel is a near-field or far-field channel. The network device can then use independent beams and / or independent intra-group phases on different antenna port groups based on the number indicated by the first information, thereby achieving better downlink transmission performance. For example, when the current channel is a far-field channel, the terminal device can report one antenna port group; when the current channel is a near-field channel, the terminal device can report multiple antenna port groups, with the number of reported antenna port groups increasing as the channel approaches the near field. The CSI feedback in related technologies is based on far-field channel design, meaning that CSI feedback reports only one beam information and / or phase information for each antenna panel. For scenarios where the current channel is a near-field channel, CSI feedback can be implemented based on the CSI feedback in related technologies (i.e., far-field channel CSI feedback), as shown in Figure 6. When reporting antenna grouping (first information) through the terminal device, it can be understood as decomposing the antenna array corresponding to the near-field channel into multiple antenna port groups corresponding to the far-field channel. Each antenna port group adopts the CSI feedback method corresponding to the far-field channel (i.e., the CSI feedback of an antenna port group corresponding to the far-field channel includes one beam information and / or phase information, and each antenna port group corresponds to an independent beam and / or an independent intra-group phase), thereby reusing the existing CSI feedback mechanism as much as possible to support CSI reporting for the near-field channel. In the example shown in Figure 6, the CSI feedback for the near-field channel includes CSI feedback for four far-field channels. Each far-field channel CSI feedback reports one beam and / or phase information. That is, the CSI feedback for the near-field channel shown in Figure 6 includes four beam and / or phase information. In other words, in one implementation, a CSI feedback method based on far-field channel design in related technologies can be used to implement CSI feedback for an antenna port group. The number of CSI feedbacks based on the far-field channel design (which can also be understood as the number of antenna port groups corresponding to the far-field channel) is determined according to the number of independent beams and / or intra-group phases required for the near-field channel. Here, an antenna port group corresponding to the far-field channel refers to an antenna port group that corresponds to the same beam and / or intra-group phase. An antenna array corresponding to the near-field channel refers to an antenna array that needs to correspond to multiple independent beams and / or intra-group phases.

[0221] In some embodiments, the first information is used to indicate the number M of antenna port groups included in the downlink antenna ports configured in the network device, wherein different antenna port groups use independent beams and / or independent intra-group phases, and antenna port groups use the same beam and / or the same intra-group phase. In one embodiment, since the number N of downlink antenna ports configured in the network device is known and equal to the number M of antenna port groups multiplied by the number K of antenna ports included in each antenna port group, the first information indicating the number M of antenna port groups and indicating the number K of antenna ports included in each antenna port group are equivalent. Even if the first information indicates K, the terminal device can easily obtain M based on N and K. Therefore, the first information can be understood as indicating the number of antenna ports included in each antenna port group.

[0222] In some embodiments, the beam can also be represented using a spatial basis (SD basis) or a DFT vector. Intra-group phase can be represented as the relative phase (co-phasing) between different polarization directions within an antenna port group. For a dual-polarization antenna array, the intra-group phase is the relative phase of the second polarization direction with respect to the first polarization direction.

[0223] In some embodiments, the first information indicates the number of antenna port groups employing independent beams and / or independent intra-group phases from a first quantity set, wherein the first quantity set is pre-configured to the terminal device by the network device, or the first quantity set is determined based on the number of downlink antenna ports configured by the network device.

[0224] The first set of quantities can be indicated to the terminal device by the network device through higher-layer signaling (e.g., CSI reporting configuration). The first set of quantities can contain values ​​such as {1, 2, 4, 8}, or it can contain values ​​such as {1, N / 4, N / 8, N / 16}, where N is the number of downlink antenna ports configured by the network device.

[0225] Alternatively, the first set of quantities can be determined by the terminal device based on the number of downlink antenna ports configured in the network device, without requiring specific signaling instructions. However, the first set of quantities corresponding to different numbers of downlink antenna ports needs to be agreed upon in advance by the terminal device and the network device.

[0226] Alternatively, the first set of quantities can be {1, 2, ..., N / K}, where all numbers in the first set are even numbers except 1, or are powers of 2, and K is defined as 16, 32, or 64, where N is the number of downlink antenna ports configured on the network device. For example, for N = 512 ports and K = 32, the first set of quantities would be {1, 2, 4, 8, 16}.

[0227] In addition, the method of first information indication should be understood.

[0228] In one implementation, the first information may only indicate the number of antenna port groups using independent beams. That is, if the first information indicates M antenna port groups using independent beams, the terminal device needs to report M beam information. Since the number of antenna port groups using independent intra-group phases is not indicated, these M antenna port groups can be agreed to use the same intra-group phase.

[0229] In another implementation, the first information may only indicate the number of antenna port groups using independent intra-group phases. That is, if the first information indicates M antenna port groups using independent intra-group phases, the terminal device needs to report the M intra-group phases. Since the number of antenna port groups using independent beams is not indicated, these M antenna port groups can be agreed to use the same beam.

[0230] In another implementation, the first information may indicate the number of antenna port groups employing independent beams and independent intra-group phases. That is, if the first information indicates M antenna port groups employing independent beams and independent intra-group phases, the terminal device needs to report M beam information and M intra-group phases.

[0231] In another implementation, the first information may indicate the number of antenna port groups using independent beams and the number of antenna port groups using independent intra-group phases. That is, the number of antenna port groups using independent beams and the number of antenna port groups using independent intra-group phases are indicated separately in the first information. For example, if the number of antenna port groups using independent beams is M and the number of antenna port groups using independent intra-group phases is O, then the terminal device needs to report M beam information and O intra-group phases.

[0232] In a specific scenario, if the number of antenna port groups using independent beams indicated by the first information is 1, it means that all antenna ports use the same beam, and the terminal device only needs to report one beam information. If the number of antenna port groups using independent intra-group phases indicated by the first information is 1, it means that all antenna ports use the same intra-group phase, and the terminal device only needs to report one intra-group phase information. However, when determining the division of antenna ports based on the first information, network devices will not necessarily divide them into only one antenna port group, but will divide them according to the specific transmission scenario.

[0233] In some embodiments, the downlink CSI feedback may consist of two parts: CSI Part 1 and CSI Part 2. The bit size of CSI Part 2 is determined based on the content reported in CSI Part 1. In this case, the first information is reported in CSI Part 1, using a known bit size.

[0234] In some embodiments, the terminal device can determine the first information based on the measured downlink channel information. The number of antenna port groups employing independent beams and / or independent intra-group phases can be determined based on whether the channel is a near-field or far-field channel. When the channel is near the far field, all downlink antenna ports can employ the same beam and / or the same intra-group phase; when the channel is near the near field, the downlink antenna ports can be divided into multiple groups, with different antenna port groups employing independent beams and / or independent intra-group phases. Generally, the more pronounced the near field, the more antenna port groups are needed, and the more feedback information is generated.

[0235] In some embodiments, the network device receives first information reported by the terminal device, the first information indicating the number of antenna port groups employing independent beams and / or independent intra-group phases. The first information is reported in CSI section 1, using a bit size known to the network device. Based on this information, the network device can determine the number of antenna port groups employing independent beams and / or independent intra-group phases.

[0236] Step 2: The terminal device reports the CSI information corresponding to the antenna port group based on the first information.

[0237] CSI information includes beam information and / or phase information.

[0238] Specifically, the terminal device can determine the content of the beam information and phase information that needs to be reported based on the quantity indicated by the first information.

[0239] For example, if the number of antenna port groups using independent beams indicated by the first information is M, then the terminal device reports the first beam information, which contains M beam information, each corresponding to one of the M antenna port groups using independent beams. As a special case, if the number of antenna port groups using independent beams indicated by the first information is 1, that is, all antenna ports (groups) use the same beam, then the terminal device only needs to report one beam information.

[0240] For example, if the number of antenna port groups using independent intra-group phase indicated by the first information is M, then the terminal device reports the first phase information, which contains M phase information, each corresponding to one of the M antenna port groups using independent intra-group phase. As a special case, if the number of antenna port groups using independent intra-group phase indicated by the first information is 1, that is, all antenna ports (groups) use the same intra-group phase, then the terminal device only needs to report one phase information.

[0241] For example, if the first information indicates the number of antenna port groups using independent beams and the number of antenna port groups using independent in-group phases, the terminal device needs to report the first beam information and the first phase information simultaneously.

[0242] In some embodiments, the network device determines the antenna port groups based on first information. The network device divides N downlink antenna ports into M antenna port groups as shown below.

[0243] Specifically, the network device determines the antenna ports included in each antenna port group based on the number of antenna port groups indicated by the first information and the downlink antenna ports configured in the network device.

[0244] In one implementation, the i-th antenna port group among the M antenna port groups contains antenna ports {(i-1)*K, (i-1)*K+1, ..., i*K-1} from the downlink antenna ports configured by the network device, where K is the number of antenna ports contained in each antenna port group, and K = N / M, where N is the number of downlink antenna ports configured by the network device. For example, assuming N = 128, M = 2, K = 64, then the first antenna port group among the M antenna port groups contains antenna ports {0, 1, ..., 63}, and the second antenna port group contains antenna ports {64, 65, ..., 127}.

[0245] In another implementation, the i-th antenna port group among the M antenna port groups contains antenna ports {(i-1)*K / 2, (i-1)*K / 2+1, ..., i*K / 2-1, (i-1)*K / 2+N / 2, (i-1)*K / 2+N / 2+1, ..., i*K / 2+N / 2-1} from the downlink antenna ports configured by the network device, where K is the number of antenna ports contained in each antenna port group, and K = N / M, where N is the number of downlink antenna ports configured by the network device. For example, assuming N = 128, M = 2, K = 64, then the first antenna port group among the M antenna port groups contains antenna ports {0, 1, ..., 31, 64, 65, ..., 95}, and the second antenna port group contains antenna ports {32, 33, ..., 63, 96, 97, ..., 127}.

[0246] In some embodiments, the CSI information includes fifth phase information, or in other words, the terminal device reports fifth phase information to the network device. The fifth phase information indicates the relative phase information between multiple antenna port groups. That is, the first phase information is used to indicate the phase between different polarizations within an antenna port group, while the fifth phase information is used to indicate the phase information between antenna port groups. Specifically, the fifth phase information indicates an Mx1 dimensional vector, where M is the number of antenna port groups, and each element corresponds to one antenna port group. For example, these elements can be multiplied by the weights of the corresponding antenna port groups to obtain the downlink feedback codeword (precoding matrix). Typically, these elements can be QPSK elements, so each element can be indicated by 2 bits of signaling. Since the weight of the first antenna port group is fixed at 1, the terminal device needs to report M-1 elements. It can be seen that the size (number of elements) of the fifth phase information is also obtained based on the number M of antenna port groups indicated by the first information.

[0247] The downlink CSI feedback can consist of two parts: CSI Part 1 and CSI Part 2. The number of bits in CSI Part 2 is determined based on the content reported in CSI Part 1. At this point, the first beam information, first phase information, and fifth phase information can be indicated in CSI Part 2, and its reported content and information size (number of bits) are determined based on the first information in CSI Part 1.

[0248] In some embodiments, beam information is used to indicate one or a group of beams (e.g., a group of beams may include a combination of a vertical dimension beam and a horizontal dimension beam), wherein the beam can be characterized by a DFT vector. In this case, the beam information is the indication information of the DFT vector, used to indicate one or more DFT vectors (e.g., corresponding to the horizontal dimension and the vertical dimension, respectively) from the set of DFT vectors configured in the network device.

[0249] In some embodiments, phase information can be used to indicate the phase within a group, i.e., the relative phase (co-phasing) between different polarization directions within an antenna port group. Specifically, it can be the relative phase of the second polarization direction with respect to the first polarization direction, i.e., the weighted value on the antenna port corresponding to the second polarization direction (the weighted value on the antenna port corresponding to the first polarization direction is 1). Here, the antenna port corresponding to the first polarization direction is the first half of the antenna ports in an antenna port group, and the antenna port corresponding to the second polarization direction is the second half of the antenna ports in an antenna port group. Therefore, the phase within a group is the weighted value on the second half of the antenna ports in an antenna port group. For example, the phase within a group can be indicated by BSPK elements {1, -1} (1 bit), or by QPSK elements {1, -1, j, -j} (2 bits), or a larger set of elements such as 8PSK elements (3 bits), 16QAM elements (4 bits), etc., can be considered to achieve higher phase accuracy.

[0250] In some embodiments, the network device receives CSI information corresponding to the antenna port group based on first information. Specifically, the network device determines the content and magnitude of the first beam information and / or first phase information in CSI section 2 based on the first information in CSI section 1, thereby obtaining the beam information and phase information corresponding to each antenna port group.

[0251] Step 3: The network device performs precoding of the data on the corresponding antenna port group based on the CSI information.

[0252] Specifically, the network device determines the antenna ports included in each antenna port group based on the number of antenna port groups indicated by the first information. Further, based on the beam information and / or phase information corresponding to each antenna port group contained in the CSI information, it determines the precoding weights (i.e., the weights corresponding to the beam and / or the phase within the group) used on the antenna ports within each antenna port group, thereby precoding the data on these antenna port groups.

[0253] In summary, the method provided in this application allows the terminal device to determine the number of antenna port groups using independent beams and / or independent intra-group phases based on the measured downlink channel information, thereby adopting the corresponding feedback method based on whether the channel is a near-field channel or a far-field channel, improving the accuracy of CSI feedback and avoiding unnecessary CSI feedback overhead.

[0254] Figure 7 shows a flowchart of an information reporting method provided by an exemplary embodiment of this application.

[0255] Step 1: The terminal device reports first information to the network device. The first information indicates whether the multiple antenna port groups configured by the network device correspond to the same beam and / or the same intra-group phase.

[0256] Specifically, the terminal device determines the first information by measuring the downlink reference signal sent by the network device. The downlink reference signal can be a CSI-RS signal used to measure CSI, and the number of ports in the downlink reference signal corresponds to the number of downlink antenna ports configured on the network device. For example, the terminal device can, based on the assumptions that multiple antenna port groups correspond to the same beam and / or the same intra-group phase and different beams and / or different intra-group phases, obtain parameters such as CSI / channel quality / channel capacity corresponding to different assumptions according to downlink channel information, and then select the optimal assumption, reporting it to the network device via the first information. In this way, the terminal device can report whether different antenna port groups use the same beam or phase depending on whether the current channel is a near-field or far-field channel. The network device can then use the same or different beams and / or intra-group phases on different antenna port groups based on the information indicated by the first information, thereby achieving better downlink transmission performance. When the current channel is a near-field channel, by reporting the first information by the terminal device, it can be determined whether multiple antenna port groups (configured by the network device) correspond to the near-field channel. Furthermore, the multiple antenna port groups (configured by the network device) corresponding to the near-field channel can be decomposed into multiple antenna port group sets corresponding to the far-field channel. Each antenna port group set adopts the CSI feedback method corresponding to the far-field channel, thereby reusing existing CSI feedback mechanisms as much as possible to support CSI reporting for the near-field channel. That is, each antenna port group set in the multiple antenna port group sets corresponding to the far-field channel includes at least one antenna port group configured by the network device. Each antenna port group set uses an independent beam and / or intra-group phase, and one antenna port group set corresponds to the CSI feedback of one far-field channel (i.e., one antenna port group set corresponds to the same beam and / or intra-group phase).

[0257] The first information can indicate whether different antenna port groups correspond to the same beam, or whether different antenna port groups correspond to the same intra-group phase, or whether different antenna port groups correspond to the same beam and the same intra-group phase.

[0258] In some embodiments, the multiple antenna port groups configured in the network device may be antenna port groups corresponding to a downlink reference signal configured in the network device for downlink CSI measurement. For example, the downlink reference signal may contain N antenna ports, which are divided into M antenna port groups.

[0259] In some embodiments, the number M of multiple antenna port groups can be configured by the network device to the terminal device. An antenna port group comprises several antenna ports located in the same geographical location, and these antenna ports can correspond to two polarization directions respectively. Assuming the network device is configured with N downlink antenna ports and includes M antenna port groups, then each antenna port group contains K = N / M antenna ports. For example, antenna ports 0, 1, ..., K-1 constitute the first antenna port group, antenna ports K, K+2, ..., 2K-1 constitute the second antenna port group, and so on. In this embodiment, the antenna port group may include an antenna panel.

[0260] In some embodiments, the first information may include one of the following:

[0261] • 1 bit of information used to indicate whether different antenna port groups correspond to the same beam and the same intra-group phase. For example, 1 indicates that different antenna port groups correspond to independent beams and independent intra-group phases; 0 indicates that different antenna port groups correspond to the same beam and the same intra-group phase.

[0262] • 1 bit of information used to indicate whether different antenna port groups correspond to the same beam. For example, 1 indicates that different antenna port groups correspond to independent beams; 0 indicates that different antenna port groups correspond to the same beam.

[0263] • 1 bit of information used to indicate whether different antenna port groups correspond to the same intra-group phase. For example, 1 indicates that different antenna port groups correspond to independent intra-group phases; 0 indicates that different antenna port groups correspond to the same intra-group phase.

[0264] • 2 bits of information, where 1 bit is used to indicate whether different antenna port groups correspond to the same beam, and the other bit is used to indicate whether different antenna port groups correspond to the same intra-group phase.

[0265] A bitmap sequence indicates which antenna port groups correspond to the same beam and the same intra-group phase. Each bit in the sequence corresponds to one antenna port group. For example, antenna port groups with an indication value of 0 correspond to the same beam and the same intra-group phase, and antenna port groups with an indication value of 1 correspond to the same beam and the same intra-group phase, but antenna port groups with an indication value of 0 and antenna port groups with an indication value of 1 correspond to independent beams and independent intra-group phases.

[0266] • A bitmap sequence is used to indicate which antenna port groups correspond to the same beam; each bit in the sequence corresponds to one antenna port group. For example, antenna port groups with an indication value of 0 correspond to the same beam, antenna port groups with an indication value of 1 correspond to the same beam, but antenna port groups with an indication value of 0 and antenna port groups with an indication value of 1 correspond to independent beams.

[0267] • A bitmap sequence indicating which antenna port groups correspond to the same intra-group phase. Each bit in the sequence corresponds to one antenna port group. For example, antenna port groups with an indication value of 0 correspond to the same intra-group phase, and antenna port groups with an indication value of 1 correspond to the same intra-group phase, but antenna port groups with an indication value of 0 and antenna port groups with an indication value of 1 correspond to independent intra-group phases.

[0268] • Two bitmap sequences, one of which indicates which antenna port groups correspond to the same beam, and the other bit indicates which antenna port groups correspond to the same intra-group phase.

[0269] In some embodiments, the downlink CSI feedback may include two parts: CSI Part 1 and CSI Part 2, where the number of bits in CSI Part 2 is determined based on the content reported in CSI Part 1. In this case, the first information is reported in CSI Part 1, using a known number of bits.

[0270] In some embodiments, the network device receives first information reported by the terminal device. This first information indicates whether multiple antenna port groups configured by the network device correspond to the same beam and / or the same intra-group phase. The first information is reported in CSI section 1 and uses a bit size known to the network device. Based on this information, the network device can determine whether multiple antenna port groups correspond to the same beam and / or the same intra-group phase.

[0271] Step 2: The terminal device reports the CSI information corresponding to the antenna port group based on the first information.

[0272] The CSI information includes beam information and / or phase information. For example, if the first information indicates that different antenna port groups correspond to independent beams, the terminal device reports second beam information, which includes beam information corresponding to each of the multiple antenna port groups.

[0273] In one implementation, the second beam information includes a first beam index and a first beam offset. The first beam index indicates the beam index corresponding to a reference antenna port group among multiple antenna port groups. The first beam offset indicates the beam index offset of other antenna port groups outside the reference antenna port group relative to the reference antenna port group. Each antenna port group outside the reference antenna port group reports its corresponding first beam offset. The first beam index can be indicated using more bits than the first beam offset; for example, the first beam index uses 6 bits of signaling, and the first beam offset uses 2 bits of signaling. Compared to independent beam reporting for each antenna port group (i.e., each antenna port group indicates its first beam index), this method can effectively reduce the overhead of beam information reporting by utilizing differential reporting.

[0274] In one embodiment, the second beam information further includes: reference antenna port group indication information, used to indicate the reference antenna port group. Specifically, the terminal device can report the index of the reference antenna port group to the network device through the indication information, so that the network can know which antenna port group the first beam index corresponds to. The reference antenna port group can be the antenna port group with the lowest beam index, thereby ensuring that the first beam offset of other antenna port groups is a non-negative integer. In another embodiment, the reference antenna port group can also be a fixed antenna port group, such as the first antenna port group among multiple antenna port groups configured by the network device.

[0275] In another implementation, the second beam information may include M beam information, where M is the number of antenna port groups, that is, the beam information corresponding to the M antenna port groups is reported independently.

[0276] In some embodiments, if the first information indicates that different antenna port groups correspond to the same beam, the terminal device reports third beam information, which is used to indicate the same beam. That is, the third beam information contains only the indication information of one beam, which applies to all antenna port groups configured in the network device.

[0277] In some embodiments, if the first information indicates via a bitmap that the first antenna port group set corresponds to the same beam, the second antenna port group set corresponds to the same beam, and these two sets correspond to independent beams, then the terminal device reports fourth beam information. The fourth beam information indicates the beam information corresponding to the first antenna port group set and the second antenna port group set, respectively. For example, if the network device is configured with four antenna port groups and the bitmap is 0011, it means that the first two antenna port groups correspond to the same beam, the last two antenna port groups correspond to the same beam, and they correspond to independent beams. In this case, the terminal device needs to report two beam information entries, corresponding to the first two antenna port groups and the last two antenna port groups, respectively.

[0278] In some embodiments, if the first information indicates that different antenna port groups correspond to independent intra-group phases, the terminal device reports second phase information, which is used to indicate the intra-group phase corresponding to each of the multiple antenna port groups. In another embodiment, the second phase information may include M phase information, where M is the number of antenna port groups, that is, the intra-group phases corresponding to the M antenna port groups are reported independently.

[0279] In some embodiments, if the first information indicates that different antenna port groups correspond to the same intra-group phase, the terminal device reports third phase information, which is used to indicate the same intra-group phase. That is, the third phase information contains only an indication of an intra-group phase, which applies to all antenna port groups configured in the network device.

[0280] In some embodiments, if the first information indicates, via a bitmap, that the first antenna port group set corresponds to the same intra-group phase, and the second antenna port group set corresponds to the same intra-group phase, and these two sets correspond to independent intra-group phases, then the terminal device reports fourth phase information. The fourth phase information indicates the intra-group phases corresponding to the first and second antenna port group sets, respectively. For example, if the network device is configured with 8 antenna port groups, and the bitmap is 00001111, it means that the first four antenna port groups correspond to the same intra-group phase, and the last four antenna port groups correspond to the same intra-group phase, and they correspond to independent intra-group phases. In this case, the terminal device needs to report two phase information entries, corresponding to the intra-group phases of the first four antenna port groups and the last four antenna port groups, respectively.

[0281] Step 3: The terminal device reports second information, which indicates the available and / or unavailable antenna port groups among multiple antenna port groups. The second information and the first information are reported in the same CSI section.

[0282] In one implementation, the second information indicates available antenna port groups among a plurality of antenna port groups. For example, the second information can indicate the index of an available antenna port group from the antenna port groups configured by the network device. In one implementation, the second information indicates unavailable antenna port groups among a plurality of antenna port groups. For example, the second information can indicate the index of an unavailable antenna port group from the antenna port groups configured by the network device. Here, an unavailable antenna port group refers to a group where the terminal device can only receive a very weak signal at the corresponding antenna port due to antenna obstruction, making transmission on these antenna ports unavailable. In one implementation, the second information indicates both available and unavailable antenna port groups among a plurality of antenna port groups. Specifically, the second information can indicate available and unavailable antenna port groups from the antenna port groups configured by the network device using a bitmap, where 1 indicates available and 0 indicates unavailable. For example, a bitmap of 10111101 indicates that the second and seventh antenna port groups are unavailable, and the other antenna port groups are available.

[0283] In some embodiments, the first information and the second information are reported independently in the CSI section, or the first information and the second information are jointly encoded in the CSI section and then reported.

[0284] In some embodiments, when the second information indicates that a portion of the antenna port group is unavailable, the terminal device is not required to report the beam information and phase information corresponding to the unavailable antenna port group.

[0285] In some embodiments, if the second beam information further includes reference antenna port group indication information for indicating a reference antenna port group, then the reference antenna port group needs to be an available antenna port group. That is, the terminal device cannot indicate an unavailable antenna port group as the reference antenna port group. If the reference antenna port group is a fixed antenna port group, then it can be the first antenna port group among the available antenna port groups.

[0286] In some embodiments, the second information is reported together with the first information in CSI section 1.

[0287] In some embodiments, the CSI information further includes fifth phase information, or the terminal device reports the fifth phase information to the network device. The fifth phase information indicates the relative phase information between multiple antenna port groups. That is, while the preceding phase information indicates the phase between different polarizations within an antenna port group, the fifth phase information indicates the phase information between antenna port groups. For example, the fifth phase information can indicate an Mx1 dimensional vector, where M is the number of antenna port groups, and each element corresponds to one antenna port group. For instance, these elements can be multiplied by the weights of the corresponding antenna port groups to obtain the downlink feedback codeword (precoding matrix). Typically, these elements can be QPSK elements, so each element can be indicated by 2 bits of signaling.

[0288] In some embodiments, if the terminal device simultaneously reports the second information (indicating the available antenna port groups and / or unavailable antenna port groups among multiple antenna port groups), the fifth phase information only needs to indicate the phase information on the available antenna port groups, and does not need to indicate the phase information on the unavailable antenna port groups. That is, M is the number of available antenna port groups at this time.

[0289] In some embodiments, the second beam information, third beam information, fourth beam information, second phase information, third phase information, fourth phase information, and fifth phase information are reported in CSI section 2. That is, the reported content and size (number of bits) of this information are determined based on the first information (or the first and second information) in CSI section 1.

[0290] In some embodiments, the network device uses CSI information corresponding to the antenna port group reported by the first information receiving terminal device. Specifically, based on the first information in CSI section 1, the network device determines the content and size of at least one of the second beam information, third beam information, fourth beam information, second phase information, third phase information, fourth phase information, and fifth phase information in CSI section 2, thereby obtaining the beam information and phase information corresponding to each antenna port group.

[0291] Step 4: The network device performs precoding of the data on the corresponding antenna port group based on the CSI information.

[0292] In summary, the method provided in this application allows the terminal device to determine whether multiple antenna port groups, such as multiple panels, configured by the network device use independent beams and / or independent intra-group phases based on the measured downlink channel information. This enables the terminal device to adopt the corresponding feedback method based on whether the channel is a near-field channel or a far-field channel, thereby improving the accuracy of CSI feedback and avoiding unnecessary CSI feedback overhead.

[0293] Figure 8 shows a structural block diagram of an information reporting device provided in an exemplary embodiment of this application. This device can be implemented as a terminal device, or as part of a terminal device, through software, hardware, or a combination of both. The device includes:

[0294] The reporting module 410 is used to report first information to the network device. The first information indicates the number of antenna port groups in the downlink antenna ports configured by the network device that use independent beams and / or independent intra-group phases. See step 210-1 for details, which will not be repeated here.

[0295] The reporting module 410 is also used to report the CSI information corresponding to the antenna port group to the network device based on the first information. See step 220-1 for details, which will not be repeated here.

[0296] Alternatively, the reporting module 410 may also report first information to the network device, which indicates whether the multiple antenna port groups configured by the network device correspond to the same beam and / or the same intra-group phase. See step 210-2 for details, which will not be repeated here.

[0297] The reporting module 410 is also used to report CSI information corresponding to multiple antenna port groups to the network device based on the first information. See step 220-2 for details, which will not be repeated here.

[0298] In summary, the apparatus provided in this application illustrates two information reporting methods. Method one involves the terminal device determining the number of antenna port groups using independent beams and / or independent intra-group phases. This means the terminal device recommends the division of antenna port groups. Since the terminal device is the measurer of the downlink channel, it has a clearer understanding of downlink channel information. By having the terminal device determine and use the first information to recommend the number of antenna port groups using independent beams and / or independent intra-group phases, the antenna port group division determined by the network device based on the first information is more consistent with the downlink channel state, improving the accuracy of feedback. Method two involves the network device pre-configuring multiple antenna port groups. The terminal device is responsible for determining whether these antenna port groups use the same beam and / or the same intra-group phase. This also allows the terminal device to determine whether to use the same beam and / or the same intra-group phase based on the downlink channel state, further improving feedback accuracy. Furthermore, the improved feedback accuracy can further reduce the high signaling overhead caused by erroneous feedback (e.g., in scenarios where only the same beam is needed, erroneous feedback uses independent beams, leading to an increase in CSI information).

[0299] Figure 9 shows a structural block diagram of an information reporting device provided in an exemplary embodiment of this application. This device can be implemented as a network device, or as part of a network device, through software, hardware, or a combination of both. The device includes:

[0300] The receiving module 510 is used to receive first information reported by the terminal device. The first information indicates the number of antenna port groups in the downlink antenna ports configured by the network device that use independent beams and / or independent intra-group phases. See step 310-1 for details, which will not be repeated here.

[0301] The receiving module 510 is also used to receive CSI information corresponding to the antenna port group reported by the terminal device based on the first information. See step 320-1 for details, which will not be repeated here.

[0302] Alternatively, the receiving module 510 is further configured to receive first information reported by the terminal device, the first information being used to indicate whether the multiple antenna port groups configured by the network device correspond to the same beam and / or the same intra-group phase. See step 310-2 for details, which will not be repeated here.

[0303] The receiving module 510 is also used to receive CSI information corresponding to multiple antenna port groups reported by the terminal device based on the first information. See step 320-2 for details, which will not be repeated here.

[0304] In summary, the apparatus provided in this application illustrates two information reporting methods. Method one involves the terminal device determining the number of antenna port groups using independent beams and / or independent intra-group phases. This means the terminal device recommends the division of antenna port groups. Since the terminal device is the measurer of the downlink channel, it has a clearer understanding of downlink channel information. By having the terminal device determine and use the first information to recommend the number of antenna port groups using independent beams and / or independent intra-group phases, the antenna port group division determined by the network device based on the first information is more consistent with the downlink channel state, improving the accuracy of feedback. Method two involves the network device pre-configuring multiple antenna port groups. The terminal device is responsible for determining whether these antenna port groups use the same beam and / or the same intra-group phase. This also allows the terminal device to determine whether to use the same beam and / or the same intra-group phase based on the downlink channel state, further improving feedback accuracy. Furthermore, the improved feedback accuracy can further reduce the high signaling overhead caused by erroneous feedback (e.g., in scenarios where only the same beam is needed, erroneous feedback uses independent beams, leading to an increase in CSI information).

[0305] The following section introduces CSI information.

[0306] In some embodiments, CSI information includes beam information and / or phase information.

[0307] In some embodiments, the CSI information further includes fifth phase information, which indicates the relative phase information between antenna port groups or multiple antenna port groups configured in the network device, as determined by the first information. For details, please refer to the above description of CSI information; it will not be repeated here.

[0308] In summary, the method provided in this application illustrates the specific content of CSI information. The CSI information first includes beam information and / or phase information, used to indicate the beam and / or intra-group phase of the antenna port group. The CSI information is reported to the network device to support the network device in performing data precoding operations based on the CSI information, thereby enabling data transmission. Furthermore, the CSI information also includes fifth phase information, which indicates the relative phase information between multiple antenna port groups, facilitating the network device in determining the final precoding method.

[0309] In other words, the first information has two indication forms: one is to indicate the number of antenna port groups using independent beams and / or independent intra-group phases, and the other is to indicate whether the antenna port groups configured in the network device correspond to the same beam and / or the same intra-group phase. The two indication forms of the first information will be further introduced below.

[0310] Indication Form 1: Indicates the number of antenna port groups that use independent beams and / or independent phases within the group.

[0311] In some embodiments, the number of antenna port groups employing independent beams and / or independent intra-group phases is determined from a first set of quantities. The first set of quantities is pre-configured by the network device; or, the first set of quantities is determined based on the number of downlink antenna ports configured by the network device.

[0312] In some embodiments, the first information indicates that the number of antenna port groups using independent beams is M. The reporting module 410 is further configured to report the first beam information to the network device. The first beam information includes M beam information, and there is a one-to-one correspondence between the M beam information and the M antenna port groups using independent beams. That is, when the first information indicates that the M antenna port groups use independent beams, the terminal device needs to report M beam information. At this time, these M antenna port groups can agree to use the same intra-group phase.

[0313] In some embodiments, the first information indicates that the number of antenna port groups using independent intra-group phase is M; the reporting module 410 is further configured to report first phase information to the network device, the first phase information including M phase information, and there is a one-to-one correspondence between the M phase information and the M antenna port groups using independent intra-group phase. That is, when the first information indicates that the M antenna port groups use independent intra-group phase, the terminal device needs to report M phase information. At this time, these M antenna port groups can agree to use the same beam.

[0314] In some embodiments, the first information indicates that the number of antenna port groups using independent beams and independent intra-group phases is M. The reporting module 410 is further configured to report the first beam information and the first phase information to the network device. The first beam information includes M beam information, and there is a one-to-one correspondence between the M beam information and the M antenna port groups using independent beams. The first phase information includes M phase information, and there is a one-to-one correspondence between the M phase information and the M antenna port groups using independent intra-group phases. That is, when the first information indicates that the M antenna port groups use independent beams and independent intra-group phases, the terminal device needs to report M beam information and M phase information.

[0315] In some embodiments, the first information indicates that the number of antenna port groups using independent beams is M, and the number of antenna port groups using independent intra-group phase is O. The reporting module 410 is further configured to report the first beam information and the first phase information to the network device. The first beam information includes M beam information, and there is a one-to-one correspondence between the M beam information and the M antenna port groups using independent beams. The first phase information includes O phase information, and there is a one-to-one correspondence between the O phase information and the O antenna port groups using independent intra-group phase. That is, when the first information indicates that the M antenna port groups use independent beams and the O antenna port groups use independent intra-group phase, the terminal device needs to report M beam information and O phase information.

[0316] In some embodiments, the first information indicates that the number of antenna port groups using independent beams is M; the receiving module 510 is further configured to receive the first beam information reported by the terminal device, the first beam information including M beam information, and there is a one-to-one correspondence between the M beam information and the M antenna port groups using independent beams.

[0317] In some embodiments, the first information indicates that the number of antenna port groups using independent intra-group phase is M; the receiving module 510 is further configured to receive the first phase information reported by the terminal device, the first phase information including M phase information, and there is a one-to-one correspondence between the M phase information and the M antenna port groups using independent intra-group phase.

[0318] In some embodiments, the first information indicates that the number of antenna port groups using independent beams and independent in-group phases is M; the receiving module 510 is further configured to receive the first beam information and the first phase information reported by the terminal device, wherein the first beam information includes M beam information, and there is a one-to-one correspondence between the M beam information and the M antenna port groups using independent beams, and the first phase information includes M phase information, and there is a one-to-one correspondence between the M phase information and the M antenna port groups using independent in-group phases.

[0319] In some embodiments, the first information indicates that the number of antenna port groups using independent beams is M, and the number of antenna port groups using independent in-group phase is O; the receiving module 510 is further configured to receive the first beam information and the first phase information reported by the terminal device, the first beam information including M beam information, the M beam information having a one-to-one correspondence with the M antenna port groups using independent beams, and the first phase information including O phase information, the O phase information having a one-to-one correspondence with the O antenna port groups using independent in-group phase.

[0320] In summary, the apparatus provided in this application determines the number of antenna port groups using independent beams and / or independent intra-group phases through a terminal device. That is, the terminal device recommends the division of antenna port groups. Since the terminal device is the measurer of the downlink channel, it has a clearer understanding of the relevant information of the downlink channel. The terminal device determines and recommends the number of antenna port groups using independent beams and / or independent intra-group phases based on the first information, which makes the division of antenna port groups determined by the network device based on the first information more consistent with the channel state of the downlink channel, thus improving the accuracy of feedback.

[0321] It should be noted that in the scenario corresponding to indication form one, the network device only configures downlink antenna ports for the terminal device. That is, the division of antenna port groups is not determined before the terminal device determines and uploads the first information. The network device will divide the configured downlink antenna ports into antenna port groups based on the received first information and CSI information, or the terminal device will divide the configured downlink antenna ports into antenna port groups based on the first information. In an optional embodiment based on FIG8, the device further includes a determining module. The determining module is used to determine the antenna ports included in each antenna port group based on the number of antenna port groups indicated by the first information and the downlink antenna ports configured by the network device. In some embodiments, the terminal device determines the antenna ports included in each antenna port group based on the number of antenna port groups indicated by the first information and the downlink antenna ports configured by the network device.

[0322] The antenna port group can be divided using either of the following two methods.

[0323] In this context, the port number p of the j-th antenna port in the i-th antenna port group of the M antenna port groups is: p = p0 + (i-1)*K + j-1, where p0 is the port number of the first antenna port in the N downlink antenna ports. Alternatively, the port numbers of the antenna ports in the i-th antenna port group of the M antenna port groups are {p0 + (i-1)*K, p0 + (i-1)*K+1, ..., p0 + i*K-1}, where p0 is the port number of the first antenna port in the N downlink antenna ports. For details, please refer to the first partitioning method described above; further explanation is omitted here.

[0324] Wherein, when 1≤j≤K / 2, the port number p of the j-th antenna port in the i-th antenna port group is: p=p0+(i-1)*K / 2+j-1; when K / 2<j≤K, the port number p of the j-th antenna port in the i-th antenna port group is: p=p0+(i-1)*K / 2+N / 2+jK / 2-1. Or, the port numbers of the antenna ports in the i-th antenna port group are {p0+(i-1)*K / 2, p0+(i-1)*K / 2+1, …, p0+i*K / 2-1, p0+(i-1)*K / 2+N / 2, p0+(i-1)*K / 2+N / 2+1, …, p0+i*K / 2+N / 2-1}. For details, please refer to the second partitioning method above, which will not be repeated here.

[0325] Indication Form Two: Indicates whether the antenna port groups correspond to the same beam and / or the same intra-group phase.

[0326] In some embodiments, the first information includes at least one of the following: a first bit information, used to indicate whether multiple antenna port groups correspond to the same beam and / or the same intra-group phase; a second bit information and a third bit information, the second bit information being used to indicate whether multiple antenna port groups correspond to the same beam and the third bit information being used to indicate whether multiple antenna port groups correspond to the same intra-group phase; a first bit map, the first bit map being used to indicate antenna port groups among multiple antenna port groups that correspond to the same beam and / or the same intra-group phase; a second bit map and a third bit map, the second bit map being used to indicate antenna port groups among multiple antenna port groups that correspond to the same beam and the third bit map being used to indicate antenna port groups among multiple antenna port groups that correspond to the same intra-group phase.

[0327] 1. Indicated in the form of bit information.

[0328] The 1.1-bit information indicates that multiple antenna port groups use independent beams.

[0329] In some embodiments, the plurality of antenna port groups includes q antenna port groups, that is, the network device is configured with q antenna port groups. When the first information indicates that the plurality of antenna port groups correspond to independent beams, or when the first information indicates that different antenna port groups correspond to independent beams, the reporting module 410 is further configured to report second beam information to the network device. The second beam information includes q beam information, and there is a one-to-one correspondence between the q beam information and the q antenna port groups using independent beams.

[0330] Optionally, beam information can be indicated by beam index and beam offset. That is, the second beam information includes a reference beam index and a beam offset, where the reference beam index is the beam index corresponding to the reference antenna port group in the q antenna port groups, and the beam offset is used to indicate the offset of the beam index of the first antenna port group in the q antenna port groups relative to the reference beam index. The first antenna port group is the antenna port group other than the reference antenna port group in the q antenna port groups.

[0331] In some embodiments, the second beam information further includes reference antenna port group indication information, which is used to indicate a reference antenna port group. Optionally, the reference antenna port group indication information is an identifier of the reference antenna port group.

[0332] In some embodiments, the plurality of antenna port groups includes q antenna port groups. When the first information indicates that the plurality of antenna port groups correspond to independent beams, the receiving module 510 is further configured to receive second beam information reported by the terminal device, the second beam information including q beam information, and the q beam information having a one-to-one correspondence with the q antenna port groups using independent beams.

[0333] For details, please refer to the above "1.1-bit information indicates that multiple antenna port groups use different beams", which will not be repeated here.

[0334] The 1.2-bit information indicates that multiple antenna port groups use the same beam.

[0335] In some embodiments, the plurality of antenna port groups includes q antenna port groups. When the first information indicates that the plurality of antenna port groups correspond to the same beam, or when the first information indicates that different antenna port groups correspond to the same beam, the reporting module 410 is further configured to report third beam information to the network device, the third beam information being used to indicate that the q antenna port groups correspond to the same beam.

[0336] In some embodiments, the plurality of antenna port groups includes q antenna port groups. When the first information indicates that the plurality of antenna port groups correspond to the same beam, the receiving module 510 is further configured to receive third beam information reported by the terminal device, the third beam information indicating that the q antenna port groups correspond to the same beam. For details, please refer to the above-described "1.2-bit information indicating that the plurality of antenna port groups use the same beam," which will not be repeated here.

[0337] The 1.3-bit information indicates that multiple antenna port groups use independent intra-group phases.

[0338] In some embodiments, the plurality of antenna port groups includes q antenna port groups. When the first information indicates that the plurality of antenna port groups correspond to independent intra-group phases, or when the first information indicates that different antenna port groups correspond to independent intra-group phases, the reporting module 410 is further configured to report second phase information to the network device. The second phase information includes q phase information, and there is a one-to-one correspondence between the q phase information and the q antenna port groups that adopt independent intra-group phases.

[0339] In some embodiments, the plurality of antenna port groups includes q antenna port groups. When the first information indicates that the plurality of antenna port groups correspond to independent intra-group phases, the receiving module 510 is further configured to receive second phase information reported by the terminal device. The second phase information includes q phase information, and there is a one-to-one correspondence between the q phase information and the q antenna port groups using independent intra-group phases. For details, please refer to the above-described "1.3-bit information indicating that the plurality of antenna port groups use different intra-group phases," which will not be repeated here.

[0340] The 1.4-bit information indicates that multiple antenna port groups use the same intra-group phase.

[0341] In some embodiments, the plurality of antenna port groups includes q antenna port groups, that is, the network device is configured with q antenna port groups. When the first information indicates that the plurality of antenna port groups correspond to the same intra-group phase, or when the first information indicates that different antenna port groups correspond to the same intra-group phase, the reporting module 410 is further configured to report third phase information to the network device, the third phase information being used to indicate the same intra-group phase corresponding to the q antenna port groups.

[0342] In some embodiments, the plurality of antenna port groups includes q antenna port groups. When the first information indicates that the plurality of antenna port groups correspond to the same intra-group phase, the receiving module 510 is further configured to receive third phase information reported by the terminal device, the third phase information being used to indicate that the q antenna port groups correspond to the same intra-group phase. For details, please refer to the above-described "1.4-bit information indicating that the plurality of antenna port groups use the same intra-group phase," which will not be repeated here.

[0343] The 1.5-bit information indicates that multiple antenna port groups use independent beams and independent intra-group phases.

[0344] In some embodiments, the plurality of antenna port groups includes q antenna port groups. When the first information indicates that the plurality of antenna port groups correspond to independent beams and independent intra-group phases, the reporting module 410 is further configured to report second beam information and second phase information to the network device. The second beam information includes q beam information, and there is a one-to-one correspondence between the q beam information and the q antenna port groups using independent beams; the second phase information includes q phase information, and there is a one-to-one correspondence between the q phase information and the q antenna port groups using independent intra-group phases.

[0345] In some embodiments, the plurality of antenna port groups includes q antenna port groups. When the first information indicates that the plurality of antenna port groups correspond to independent beams and independent intra-group phases, the receiving module 510 is further configured to receive second beam information and second phase information reported by the terminal device. The second beam information includes q beam information, and there is a one-to-one correspondence between the q beam information and the q antenna port groups using independent beams; the second phase information includes q phase information, and there is a one-to-one correspondence between the q phase information and the q antenna port groups using independent intra-group phases. For details, please refer to the above-described "1.5-bit information indicating that the plurality of antenna port groups use different beams and intra-group phases," which will not be repeated here.

[0346] The 1.6-bit information indicates that multiple antenna port groups use the same beam and the same intra-group phase.

[0347] In some embodiments, the plurality of antenna port groups includes q antenna port groups. When the first information indicates that the plurality of antenna port groups correspond to the same beam and the same intra-group phase, the reporting module 410 is further configured to report third beam information and third phase information to the network device. The third beam information is used to indicate a common beam corresponding to the q antenna port groups, and the third phase information is used to indicate a common intra-group phase corresponding to the q antenna port groups.

[0348] In some embodiments, the plurality of antenna port groups includes q antenna port groups. When the first information indicates that the plurality of antenna port groups correspond to the same beam and the same intra-group phase, the receiving module 510 is further configured to report third beam information and third phase information to the network device. The third beam information is used to indicate that the q antenna port groups correspond to a common beam, and the third phase information is used to indicate that the q antenna port groups correspond to a common intra-group phase. For details, please refer to the above-described "1.6-bit information indicating that the plurality of antenna port groups use the same beam and the same intra-group phase," which will not be repeated here.

[0349] 2. Indicated in the form of a bitmap.

[0350] The 2.1 bitmap indicates antenna port groups that use the same beam across multiple antenna port groups.

[0351] In some embodiments, the first information is used to indicate that the antenna port groups in the first antenna port group set correspond to the same beam, the antenna port groups in the second antenna port group set correspond to the same beam, and the first antenna port group set and the second antenna port group set correspond to independent beams; the reporting module 410 is also used to report fourth beam information to the network device, the fourth beam information being used to indicate the beam information corresponding to the first antenna port group set and the beam information corresponding to the second antenna port group set.

[0352] In some embodiments, the first information is used to indicate that the antenna port groups in the first antenna port group set correspond to the same beam, the antenna port groups in the second antenna port group set correspond to the same beam, and the first antenna port group set and the second antenna port group set correspond to independent beams; the receiving module 510 is further used to receive fourth beam information reported by the terminal device, the fourth beam information being used to indicate the beam information corresponding to the first antenna port group set and the beam information corresponding to the second antenna port group set. For details, please refer to the above "2.1 Bitmap indicating antenna port groups using the same beam among multiple antenna port groups", which will not be repeated here.

[0353] The 2.2-bit bitmap indicates antenna port groups that use the same intra-group phase among multiple antenna port groups.

[0354] In some embodiments, the first information is used to indicate that the antenna port groups in the first antenna port group set correspond to the same intra-group phase, the antenna port groups in the second antenna port group set correspond to the same intra-group phase, and the first antenna port group set and the second antenna port group set correspond to independent intra-group phases; the reporting module 410 is also used to report fourth phase information to the network device, the fourth phase information being used to indicate the phase information corresponding to the first antenna port group set and the phase information corresponding to the second antenna port group set.

[0355] In some embodiments, the first information is used to indicate that antenna port groups in the first antenna port group set correspond to the same intra-group phase, antenna port groups in the second antenna port group set correspond to the same intra-group phase, and the first antenna port group set and the second antenna port group set correspond to independent intra-group phases; the receiving module 510 is further used to receive fourth phase information reported by the terminal device, the fourth phase information being used to indicate the phase information corresponding to the first antenna port group set and the phase information corresponding to the second antenna port group set. For details, please refer to the above "2.2-bit bitmap indicating antenna port groups using the same intra-group phase among multiple antenna port groups", which will not be repeated here.

[0356] The 2.3-bit bitmap indicates antenna port groups that use the same beam and the same intra-group phase in multiple antenna port groups.

[0357] In some embodiments, the first information is used to indicate that antenna port groups in the first antenna port group set correspond to the same beam and the same intra-group phase, antenna port groups in the second antenna port group set correspond to the same beam and the same intra-group phase, and the first antenna port group set and the second antenna port group set correspond to independent beams and independent intra-group phases; or, the first information is used to indicate that antenna port groups in the third antenna port group set correspond to the same beam, antenna port groups in the fourth antenna port group set correspond to the same beam, the third antenna port group set and the fourth antenna port group set correspond to independent beams, antenna port groups in the fifth antenna port group set correspond to the same intra-group phase, antenna port groups in the sixth antenna port group set correspond to the same intra-group phase, and the fifth antenna port group set and the sixth antenna port group set correspond to independent intra-group phases. The reporting module 410 is also used to report fourth beam information and fourth phase information to the network device; the fourth beam information is used to indicate the beam information corresponding to the first antenna port group set and the beam information corresponding to the second antenna port group set, and the fourth phase information is used to indicate the phase information corresponding to the first antenna port group set and the phase information corresponding to the second antenna port group set; or, the fourth beam information is used to indicate the beam information corresponding to the third antenna port group set and the beam information corresponding to the fourth antenna port group set, and the fourth phase information is used to indicate the phase information corresponding to the fifth antenna port group set and the phase information corresponding to the sixth antenna port group set.

[0358] In some embodiments, the first information is used to indicate that antenna port groups in the first antenna port group set correspond to the same beam and the same intra-group phase, antenna port groups in the second antenna port group set correspond to the same beam and the same intra-group phase, and the first antenna port group set and the second antenna port group set correspond to independent beams and independent intra-group phases; or, the first information is used to indicate that antenna port groups in the third antenna port group set correspond to the same beam, antenna port groups in the fourth antenna port group set correspond to the same beam, the third antenna port group set and the fourth antenna port group set correspond to independent beams, antenna port groups in the fifth antenna port group set correspond to the same intra-group phase, antenna port groups in the sixth antenna port group set correspond to the same intra-group phase, and the fifth antenna port group set and the sixth antenna port group set correspond to independent intra-group phases. The receiving module 510 is further configured to receive fourth beam information and fourth phase information reported by the terminal device; the fourth beam information is used to indicate the beam information corresponding to the first antenna port group set and the beam information corresponding to the second antenna port group set, and the fourth phase information is used to indicate the phase information corresponding to the first antenna port group set and the phase information corresponding to the second antenna port group set; or, the fourth beam information is used to indicate the beam information corresponding to the third antenna port group set and the beam information corresponding to the fourth antenna port group set, and the fourth phase information is used to indicate the phase information corresponding to the fifth antenna port group set and the phase information corresponding to the sixth antenna port group set.

[0359] For details, please refer to the above "2.3-bit bitmap indicating antenna port groups that use the same beam and the same intra-group phase in multiple antenna port groups", which will not be repeated here.

[0360] In summary, the method provided in this application involves a network device pre-configuring multiple antenna port groups. The terminal device is responsible for determining whether these antenna port groups use the same beam and / or the same intra-group phase. This allows the terminal device to determine whether to use the same beam and / or the same intra-group phase based on the channel state of the downlink channel, thus improving the accuracy of feedback. Furthermore, the improved feedback accuracy further reduces the high signaling overhead caused by erroneous feedback (e.g., in scenarios where only the same beam is needed, an independent beam is used due to erroneous feedback, leading to an increase in CSI information).

[0361] It should be noted that, in indication form two, although multiple antenna port groups are pre-configured by the network device, the network device can also use the above-described "division method one" and "division method two" to divide the antenna port groups when configuring them. This application embodiment does not limit this.

[0362] In some embodiments, in addition to reporting the first information, the terminal device also determines the available antenna port groups and unavailable antenna port groups in the antenna port group based on the measured downlink channel information.

[0363] In an optional embodiment based on FIG8, the reporting module 410 is further configured to report second information to the network device, the second information being reported in the same CSI section as the first information; wherein the second information is used to indicate the available antenna port group and / or unavailable antenna port group among the multiple antenna port groups configured by the network device, as determined according to the first information.

[0364] In some embodiments, the first information and the second information are reported independently in the CSI section; or, the first information and the second information are jointly encoded and reported in the CSI section.

[0365] In some embodiments, the terminal device only reports CSI information for available antenna port groups.

[0366] In some embodiments, in a scenario where the terminal device reports second information, the reference antenna port group mentioned in the above "indication form two" is an available antenna port group; or, in other words, the reference antenna port group is indicated as an available antenna port group.

[0367] In an optional embodiment based on FIG9, the receiving module 510 is further configured to receive second information reported by the terminal device, the second information being reported in the same CSI section as the first information; wherein the second information is used to indicate the available antenna port group and / or unavailable antenna port group among the multiple antenna port groups configured by the network device determined according to the first information.

[0368] In some embodiments, at least one of the length and content of the CSI information is determined based on the first information; wherein the CSI information includes at least one of the following: first beam information, second beam information, third beam information, fourth beam information, first phase information, second phase information, third phase information, fourth phase information, and fifth phase information. Alternatively, at least one of the length and content of the CSI information is determined based on the first and second information. The length may also be referred to as information size, number of bits, etc.

[0369] In some embodiments, at least one of the first information and the second information is reported in the first CSI section; the CSI information is reported in the second CSI section; wherein the CSI information includes at least one of the first beam information, the second beam information, the third beam information, the fourth beam information, the first phase information, the second phase information, the third phase information, the fourth phase information, and the fifth phase information.

[0370] It should be noted that the device provided in the above embodiments is only an example of the division of the above functional modules. In actual applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0371] Regarding the apparatus in this embodiment, the specific manner in which each module performs its operations has been described in detail in the embodiments related to the method, and will not be elaborated upon here.

[0372] Figure 10 shows a schematic diagram of the structure of a terminal device provided in an exemplary embodiment of this application. The terminal device 600 can be used to execute the method steps performed by the terminal device in the above embodiments. The terminal device 600 may include: a processor 601, a transceiver 602, and a memory 603. The processor 601 can be used to control sending and / or receiving. The transceiver 602 can be used to implement sending and / or receiving functions.

[0373] The processor 601 includes one or more processing cores. The processor 601 executes various functional applications and information processing by running software programs and modules.

[0374] The transceiver 602 may include a receiver and a transmitter. For example, the receiver and transmitter may be implemented as the same wireless communication component, which may include a wireless communication chip and a radio frequency antenna.

[0375] The memory 603 can be connected to the processor 601 and the transceiver 602.

[0376] The memory 603 can be used to store a computer program executed by the processor, and the processor 601 is used to execute the computer program to implement the various steps in the above method embodiments.

[0377] Furthermore, memory 603 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, including but not limited to: magnetic disks or optical disks, electrically erasable programmable read-only memory, erasable programmable read-only memory, static on-demand memory, read-only memory, magnetic memory, flash memory, and programmable read-only memory.

[0378] For details not described in this embodiment, please refer to the embodiments above, which will not be repeated here.

[0379] Figure 11 shows a schematic diagram of the structure of a network device provided in an exemplary embodiment of this application. The network device 700 can be used to execute the method steps performed by the network device in the above embodiments. The network device 700 may include: a processor 701, a transceiver 702, and a memory 703. The processor 701 can be used to control transmission and / or reception. The transceiver 702 can be used to implement transmission and / or reception functions.

[0380] The processor 701 includes one or more processing cores. The processor 701 executes various functional applications and information processing by running software programs and modules.

[0381] Transceiver 702 may include a receiver and a transmitter. For example, transceiver 702 may include a wired communication component, which may include a wired communication chip and a wired interface (such as a fiber optic interface). Optionally, transceiver 702 may also include a wireless communication component, which may include a wireless communication chip and a radio frequency antenna.

[0382] The memory 703 can be connected to the processor 701 and the transceiver 702.

[0383] The memory 703 can be used to store a computer program executed by the processor, and the processor 701 is used to execute the computer program to implement the various steps performed by the network device in the above method embodiment.

[0384] Furthermore, the memory 703 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, including but not limited to: magnetic disks or optical disks, electrically erasable programmable read-only memory, erasable programmable read-only memory, static on-demand memory, read-only memory, magnetic memory, flash memory, and programmable read-only memory.

[0385] For details not described in this embodiment, please refer to the embodiments above, which will not be repeated here.

[0386] This application also provides a computer-readable storage medium storing a computer program for execution by a processor to implement the aforementioned random access channel transmission method. In some embodiments, the computer-readable storage medium may include ROM (Read-Only Memory), RAM (Random-Access Memory), SSD (Solid State Drives), or optical disc, etc. The random access memory may include ReRAM (Resistance Random Access Memory) and DRAM (Dynamic Random Access Memory).

[0387] This application also provides a chip, which includes programmable logic circuits and / or program instructions. When the chip is running, it is used to implement the above-described information reporting method. This application also provides a computer program product, which includes a computer program stored in a computer-readable storage medium. A processor reads and executes the computer program from the computer-readable storage medium to implement the above-described information reporting method. This application also provides a computer program stored in a computer-readable storage medium. A processor obtains the computer program from the computer-readable storage medium and executes the computer program to implement the above-described information reporting method.

[0388] It should be understood that the term "instruction" mentioned in the embodiments of this application can be a direct instruction, an indirect instruction, or an indication of an association. For example, A instructing B can mean that A directly instructs B, for example, B can be obtained through A; it can also mean that A indirectly instructs B, for example, A instructs C, B can be obtained through C; or it can mean that there is an association between A and B. In the description of the embodiments of this application, the term "corresponding" can mean that there is a direct or indirect correspondence between two things, or that there is an association between two things, or it can mean an instruction and being instructed, a configuration and being configured, etc. The term "multiple" mentioned herein refers to two or more. "And / or" describes the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following associated objects are in an "or" relationship. The term "greater than or equal to" mentioned herein can mean greater than or equal to, or greater than; and "less than or equal to" can mean less than or equal to, or less than. Furthermore, the step numbers described herein are merely illustrative of one possible execution order among the steps. In some other embodiments, the steps may not be executed in the numerical order, such as two steps with different numbers being executed simultaneously, or two steps with different numbers being executed in the reverse order of the illustration. This application does not limit this. Those skilled in the art should recognize that the functions described in the above one or more examples can be implemented using hardware, software, firmware, or any combination thereof. When implemented using software, these functions can be stored in a computer-readable medium or transmitted as one or more instructions or code on a computer-readable medium. Computer-readable media include computer storage media and communication media, wherein communication media include any medium that facilitates the transmission of computer programs from one place to another. Storage media can be any available medium accessible to general-purpose or special-purpose computers.

[0389] The above are merely exemplary embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application shall be included within the protection scope of this application.

Claims

1. An information reporting method, characterized in that, The method is executed by a terminal device, and the method includes: The system reports first information to the network device, the first information indicating the number of antenna port groups in the downlink antenna ports configured by the network device that use independent beams and / or independent intra-group phases; based on the first information, the system reports Channel State Information (CSI) corresponding to the antenna port groups to the network device; or, the system reports first information to the network device, the first information indicating whether the multiple antenna port groups configured by the network device correspond to the same beam and / or the same intra-group phase; based on the first information, the system reports CSI information corresponding to the multiple antenna port groups to the network device.

2. The method according to claim 1, characterized in that, The CSI information includes beam information and / or phase information.

3. The method according to claim 1 or 2, characterized in that, The number of antenna port groups employing independent beams and / or independent intra-group phases is determined from a first set of quantities; wherein the first set of quantities is pre-configured by the network device, or determined based on the number of downlink antenna ports configured by the network device.

4. The method according to any one of claims 1 to 3, characterized in that, The first information indicates that the number of antenna port groups using independent beams is M; the step of reporting the CSI information corresponding to the antenna port groups to the network device based on the first information includes: reporting first beam information to the network device, wherein the first beam information includes M beam information, and the M beam information has a one-to-one correspondence with the M antenna port groups using independent beams.

5. The method according to any one of claims 1 to 4, characterized in that, The first information indicates that the number of antenna port groups using independent intra-group phase is M; the step of reporting the CSI information corresponding to the antenna port group to the network device based on the first information includes: reporting first phase information to the network device, wherein the first phase information includes M phase information, and the M phase information has a one-to-one correspondence with the M antenna port groups using independent intra-group phase.

6. The method according to any one of claims 1 to 5, characterized in that, The method further includes: determining the antenna ports included in each antenna port group based on the number of antenna port groups indicated by the first information and the downlink antenna ports configured in the network device.

7. The method according to claim 6, characterized in that, The network device is configured with N downlink antenna ports. The number of antenna port groups determined according to the first information is M. Then the number of antenna ports in each antenna port group is K, where K = N / M. The port number p of the j-th antenna port in the i-th antenna port group of the M antenna port groups is: p = p0 + (i-1)*K + j-1, where p0 is the port number of the first antenna port in the N downlink antenna ports; or, when 1 ≤ j ≤ K / 2, the port number p of the j-th antenna port in the i-th antenna port group is: p = p0 + (i-1)*K / 2 + j-1; when K / 2 < j ≤ K, the port number p of the j-th antenna port in the i-th antenna port group is: p = p0 + (i-1)*K / 2 + N / 2 + jK / 2-1; or, the port number p of the j-th antenna port in the M antenna port groups is: p = p0 + (i-1)*K / 2 + N / 2 + jK / 2-1; The port numbers of the antenna ports in the group are {p0+(i-1)*K, p0+(i-1)*K+1, ..., p0+i*K-1}, where p0 is the port number of the first antenna port among the N downlink antenna ports; or, the port numbers of the antenna ports in the i-th antenna port group are {p0+(i-1)*K / 2, p0+(i-1)*K / 2+1, ..., p0+i*K / 2-1, p0+(i-1)*K / 2+N / 2, p0+(i-1)*K / 2+N / 2+1, ..., p0+i*K / 2+N / 2-1}; where i, j, N, M, and K are all positive integers, and p and p0 are 0 or positive integers.

8. The method according to claim 1 or 2, characterized in that, The first information is used to indicate whether the multiple antenna port groups configured by the network device correspond to the same beam and / or the same intra-group phase. The first information includes at least one of the following: a first bit information, which is used to indicate whether the multiple antenna port groups correspond to the same beam and / or the same intra-group phase; a second bit information and a third bit information, where the second bit information is used to indicate whether the multiple antenna port groups correspond to the same beam and the third bit information is used to indicate whether the multiple antenna port groups correspond to the same intra-group phase. A first bitmap is used to indicate antenna port groups that correspond to the same beam and / or the same intra-group phase among the plurality of antenna port groups; The second bitmap and the third bitmap, wherein the second bitmap is used to indicate antenna port groups corresponding to the same beam in the plurality of antenna port groups, and the third bitmap is used to indicate antenna port groups corresponding to the same intra-group phase in the plurality of antenna port groups.

9. The method according to claim 1, 2, or 8, characterized in that, The plurality of antenna port groups includes q antenna port groups, and the first information indicates that the q antenna port groups correspond to independent beams; The step of reporting CSI information corresponding to the plurality of antenna port groups to the network device based on the first information includes: reporting second beam information to the network device, wherein the second beam information includes q beam information, and the q beam information has a one-to-one correspondence with the q antenna port groups using independent beams.

10. The method according to claim 9, characterized in that, The second beam information includes a reference beam index and a beam offset. The reference beam index is the beam index corresponding to the reference antenna port group among the q antenna port groups. The beam offset is used to indicate the offset of the beam index of the first antenna port group among the q antenna port groups relative to the reference beam index. The first antenna port group is the antenna port group other than the reference antenna port group among the q antenna port groups.

11. The method according to claim 10, characterized in that, The second beam information also includes reference antenna port group indication information, which is used to indicate the reference antenna port group.

12. The method according to claim 1, 2, or 8, characterized in that, The plurality of antenna port groups includes q antenna port groups, and the first information indicates that the q antenna port groups correspond to the same beam; the step of reporting the CSI information corresponding to the plurality of antenna port groups to the network device based on the first information includes: reporting third beam information to the network device, the third beam information being used to indicate that the q antenna port groups correspond to the same beam.

13. The method according to claim 1, 2, or 8, characterized in that, The first information is used to indicate that the antenna port groups in the first antenna port group set correspond to the same beam, the antenna port groups in the second antenna port group set correspond to the same beam, and the first antenna port group set and the second antenna port group set correspond to independent beams; The step of reporting CSI information corresponding to the plurality of antenna port groups to the network device based on the first information includes: reporting fourth beam information to the network device, wherein the fourth beam information is used to indicate the beam information corresponding to the first antenna port group set and the beam information corresponding to the second antenna port group set.

14. The method according to claim 1, 2, or 8, characterized in that, The plurality of antenna port groups includes q antenna port groups, and the first information indicates that the q antenna port groups correspond to independent intra-group phases; The step of reporting CSI information corresponding to the plurality of antenna port groups to the network device based on the first information includes: reporting second phase information to the network device, wherein the second phase information includes q phase information, and the q phase information has a one-to-one correspondence with the q antenna port groups that adopt independent intra-group phase.

15. The method according to claim 1, 2, or 8, characterized in that, The plurality of antenna port groups includes q antenna port groups, and the first information indicates that the q antenna port groups correspond to the same intra-group phase; The step of reporting CSI information corresponding to the plurality of antenna port groups to the network device based on the first information includes: reporting third phase information to the network device, wherein the third phase information is used to indicate a common intra-group phase corresponding to the q antenna port groups.

16. The method according to claim 1, 2, or 8, characterized in that, The first information is used to indicate that the antenna port groups in the first antenna port group set correspond to the same intra-group phase, the antenna port groups in the second antenna port group set correspond to the same intra-group phase, and the first antenna port group set and the second antenna port group set correspond to independent intra-group phases; The step of reporting the CSI information corresponding to the antenna port group to the network device based on the first information includes: reporting fourth phase information to the network device, wherein the fourth phase information is used to indicate the intra-group phase corresponding to the first antenna port group set and the intra-group phase corresponding to the second antenna port group set.

17. The method according to any one of claims 1 to 16, characterized in that, The CSI information also includes fifth phase information, which is used to indicate the relative phase information between antenna port groups in the antenna port group determined according to the first information or among the multiple antenna port groups configured by the network device.

18. The method according to any one of claims 1 to 17, characterized in that, The method further includes: reporting second information to the network device, wherein the second information and the first information are reported in the same CSI section; wherein the second information is used to indicate available antenna port groups and / or unavailable antenna port groups among the antenna port groups determined according to the first information or among the multiple antenna port groups configured by the network device.

19. The method according to claim 18, characterized in that, The first information and the second information are reported independently in the CSI section; or, the first information and the second information are jointly encoded in the CSI section and then reported.

20. The method according to claim 18 or 19, characterized in that, The terminal device only reports the CSI information of the available antenna port groups.

21. The method according to claim 10, 11, 18, 19, or 20, characterized in that, The reference antenna port group is indicated as an available antenna port group.

22. The method according to any one of claims 1 to 21, characterized in that, The length and content of the CSI information are determined based on the first information; wherein the CSI information includes at least one of the following: first beam information, second beam information, third beam information, fourth beam information, first phase information, second phase information, third phase information, fourth phase information, and fifth phase information.

23. The method according to any one of claims 1 to 22, characterized in that, At least one of the first information and the second information is reported in the first CSI section; the CSI information is reported in the second CSI section; wherein the CSI information includes at least one of the first beam information, the second beam information, the third beam information, the fourth beam information, the first phase information, the second phase information, the third phase information, the fourth phase information, and the fifth phase information.

24. An information reporting method, characterized in that, The method is executed by a terminal device, and the method includes: The system receives first information reported by a terminal device, the first information indicating the number of antenna port groups in the downlink antenna ports configured by the network device that use independent beams and / or independent intra-group phases; based on the first information, it receives Channel State Information (CSI) information corresponding to the antenna port groups reported by the terminal device; or, it receives first information reported by the terminal device, the first information indicating whether the multiple antenna port groups configured by the network device correspond to the same beam and / or the same intra-group phase; based on the first information, it receives CSI information corresponding to the multiple antenna port groups reported by the terminal device.

25. The method according to claim 24, characterized in that, The CSI information includes beam information and / or phase information.

26. The method according to claim 24 or 25, characterized in that, The number of antenna port groups employing independent beams and / or independent intra-group phases is determined from a first set of quantities; wherein the first set of quantities is pre-configured by the network device, or determined based on the number of downlink antenna ports configured by the network device.

27. The method according to any one of claims 24 to 26, characterized in that, The first information indicates that the number of antenna port groups using independent beams is M; the step of receiving CSI information corresponding to the antenna port groups reported by the terminal device based on the first information includes: receiving first beam information reported by the terminal device, wherein the first beam information includes M beam information, and the M beam information has a one-to-one correspondence with the M antenna port groups using independent beams.

28. The method according to any one of claims 24 to 27, characterized in that, The first information indicates that the number of antenna port groups using independent intra-group phase is M; the step of receiving CSI information corresponding to the antenna port group reported by the terminal device based on the first information includes: receiving first phase information reported by the terminal device, wherein the first phase information includes M phase information, and the M phase information has a one-to-one correspondence with the M antenna port groups using independent intra-group phase.

29. The method according to any one of claims 24 to 28, characterized in that, Based on the number of antenna port groups indicated by the first information and the downlink antenna ports configured in the network device, determine the antenna ports included in each antenna port group.

30. The method according to claim 29, characterized in that, The network device is configured with N downlink antenna ports. The number of antenna port groups determined according to the first information is M. Then the number of antenna ports in each antenna port group is K, where K = N / M. The port number p of the j-th antenna port in the i-th antenna port group of the M antenna port groups is: p = p0 + (i-1)*K + j-1, where p0 is the port number of the first antenna port in the N downlink antenna ports; or, when 1 ≤ j ≤ K / 2, the port number p of the j-th antenna port in the i-th antenna port group is: p = p0 + (i-1)*K / 2 + j-1; when K / 2 < j ≤ K, the port number p of the j-th antenna port in the i-th antenna port group is: p = p0 + (i-1)*K / 2 + N / 2 + jK / 2-1; or, the port number p of the j-th antenna port in the M antenna port groups is: p = p0 + (i-1)*K / 2 + N / 2 + jK / 2-1; The port numbers of the antenna ports in the group are {p0+(i-1)*K, p0+(i-1)*K+1, ..., p0+i*K-1}, where p0 is the port number of the first antenna port among the N downlink antenna ports; or, the port numbers of the antenna ports in the i-th antenna port group are {p0+(i-1)*K / 2, p0+(i-1)*K / 2+1, ..., p0+i*K / 2-1, p0+(i-1)*K / 2+N / 2, p0+(i-1)*K / 2+N / 2+1, ..., p0+i*K / 2+N / 2-1}; where i, j, N, M, and K are all positive integers, and p and p0 are 0 or positive integers.

31. The method according to claim 24 or 25, characterized in that, The first information is used to indicate whether the multiple antenna port groups configured by the network device correspond to the same beam and / or the same intra-group phase. The first information includes at least one of the following: a first bit information, which is used to indicate whether the multiple antenna port groups correspond to the same beam and / or the same intra-group phase; a second bit information and a third bit information, where the second bit information is used to indicate whether the multiple antenna port groups correspond to the same beam and the third bit information is used to indicate whether the multiple antenna port groups correspond to the same intra-group phase. A first bitmap is used to indicate antenna port groups that correspond to the same beam and / or the same intra-group phase among the plurality of antenna port groups; The second bitmap and the third bitmap, wherein the second bitmap is used to indicate antenna port groups corresponding to the same beam in the plurality of antenna port groups, and the third bitmap is used to indicate antenna port groups corresponding to the same intra-group phase in the plurality of antenna port groups.

32. The method according to claim 24, 25, or 31, characterized in that, The plurality of antenna port groups includes q antenna port groups, and the first information indicates that the q antenna port groups correspond to independent beams; The step of receiving CSI information corresponding to the plurality of antenna port groups reported by the terminal device based on the first information includes: receiving second beam information reported by the terminal device, wherein the second beam information includes q beam information, and the q beam information has a one-to-one correspondence with the q antenna port groups using independent beams.

33. The method according to claim 32, characterized in that, The second beam information includes a reference beam index and a beam offset. The reference beam index is the beam index corresponding to the reference antenna port group among the q antenna port groups. The beam offset is used to indicate the offset of the beam index of the first antenna port group among the q antenna port groups relative to the reference beam index. The first antenna port group is the antenna port group other than the reference antenna port group among the q antenna port groups.

34. The method according to claim 33, characterized in that, The second beam information also includes reference antenna port group indication information, which is used to indicate the reference antenna port group.

35. The method according to claim 24, 25, or 31, characterized in that, The plurality of antenna port groups includes q antenna port groups, and the first information indicates that the q antenna port groups correspond to the same beam; the step of receiving CSI information corresponding to the plurality of antenna port groups reported by the terminal device based on the first information includes: receiving third beam information reported by the terminal device, the third beam information being used to indicate that the q antenna port groups correspond to the same beam.

36. The method according to claim 24, 25, or 31, characterized in that, The first information is used to indicate that the antenna port groups in the first antenna port group set correspond to the same beam, the antenna port groups in the second antenna port group set correspond to the same beam, and the first antenna port group set and the second antenna port group set correspond to independent beams; The step of receiving CSI information corresponding to the plurality of antenna port groups reported by the terminal device based on the first information includes: receiving fourth beam information reported by the terminal device, wherein the fourth beam information is used to indicate the beam information corresponding to the first antenna port group set and the beam information corresponding to the second antenna port group set.

37. The method according to claim 24, 25, or 31, characterized in that, The plurality of antenna port groups includes q antenna port groups, and the first information indicates that the q antenna port groups correspond to independent intra-group phases; The step of receiving CSI information corresponding to the plurality of antenna port groups reported by the terminal device based on the first information includes: receiving second phase information reported by the terminal device, wherein the second phase information includes q phase information, and the q phase information has a one-to-one correspondence with the q antenna port groups that adopt independent intra-group phase.

38. The method according to claim 24, 25, or 31, characterized in that, The plurality of antenna port groups includes q antenna port groups, and the first information indicates that the q antenna port groups correspond to the same intra-group phase; The step of receiving CSI information corresponding to the plurality of antenna port groups reported by the terminal device based on the first information includes: receiving third phase information reported by the terminal device, wherein the third phase information is used to indicate a common intra-group phase corresponding to the q antenna port groups.

39. The method according to claim 24, 25, or 31, characterized in that, The first information is used to indicate that the antenna port groups in the first antenna port group set correspond to the same intra-group phase, the antenna port groups in the second antenna port group set correspond to the same intra-group phase, and the first antenna port group set and the second antenna port group set correspond to independent intra-group phases; The step of receiving CSI information corresponding to the plurality of antenna port groups reported by the terminal device based on the first information includes: receiving fourth phase information reported by the terminal device, wherein the fourth phase information is used to indicate the intra-group phase corresponding to the first antenna port group set and the intra-group phase corresponding to the second antenna port group set.

40. The method according to any one of claims 24 to 39, characterized in that, The CSI information also includes fifth phase information, which is used to indicate the relative phase information between antenna port groups in the antenna port group determined according to the first information or among the multiple antenna port groups configured by the network device.

41. The method according to any one of claims 24 to 40, characterized in that, The method further includes: receiving second information reported by the terminal device, wherein the second information and the first information are reported in the same CSI section; wherein the second information is used to indicate the available antenna port groups and unavailable antenna port groups among the multiple antenna port groups configured by the network device determined according to the first information.

42. The method according to claim 41, characterized in that, The first information and the second information are reported independently in the CSI section; or, the first information and the second information are jointly encoded in the CSI section and then reported.

43. The method according to claim 41 or 42, characterized in that, The terminal device only reports the beam information and phase information of the available antenna port groups.

44. The method according to claim 33, 34, 41, 42, or 43, characterized in that, The reference antenna port group is indicated as an available antenna port group.

45. The method according to any one of claims 24 to 44, characterized in that, The length and content of the CSI information are determined based on the first information; wherein the CSI information includes at least one of the following: first beam information, second beam information, third beam information, fourth beam information, first phase information, second phase information, third phase information, fourth phase information, and fifth phase information.

46. ​​The method according to any one of claims 24 to 45, characterized in that, At least one of the first information and the second information is reported in the first CSI section; the CSI information is reported in the second CSI section; wherein the CSI information includes at least one of the first beam information, the second beam information, the third beam information, the fourth beam information, the first phase information, the second phase information, the third phase information, the fourth phase information, and the fifth phase information.

47. An information reporting device, characterized in that, The device includes: a reporting module, configured to report first information to a network device, the first information indicating the number of antenna port groups in the downlink antenna ports configured by the network device that use independent beams and / or independent intra-group phases; the reporting module is further configured to report channel state information (CSI) corresponding to the antenna port groups to the network device based on the first information; or, the reporting module is further configured to report the first information to the network device, the first information indicating whether the multiple antenna port groups configured by the network device correspond to the same beam and / or the same intra-group phase; the reporting module is further configured to report the CSI information corresponding to the multiple antenna port groups to the network device based on the first information.

48. An information reporting device, characterized in that, The apparatus includes: a receiving module, configured to receive first information reported by a terminal device, the first information indicating the number of antenna port groups in the downlink antenna ports configured by the network device that employ independent beams and / or independent intra-group phases; the receiving module is further configured to receive CSI information corresponding to the antenna port groups reported by the terminal device based on the first information; or, the receiving module is further configured to receive the first information reported by the terminal device, the first information indicating whether the multiple antenna port groups configured by the network device correspond to the same beam and / or the same intra-group phase; the receiving module is further configured to receive CSI information corresponding to the multiple antenna port groups reported by the terminal device based on the first information.

49. A terminal device, characterized in that, The terminal device includes: A processor; a transceiver connected to the processor; a memory for storing executable instructions of the processor; wherein the processor is configured to load and execute the executable instructions to implement the information reporting method as described in any one of claims 1 to 23.

50. A network device, characterized in that, The network device includes: A processor; a transceiver connected to the processor; a memory for storing executable instructions of the processor; wherein the processor is configured to load and execute the executable instructions to implement the information reporting method as described in any one of claims 24 to 46.

51. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores at least one program, which is loaded and executed by a processor to implement the information reporting method as described in any one of claims 1 to 46.

52. A chip, characterized in that, The chip includes programmable logic circuits and / or program instructions, and when the chip is running on a terminal device or network device, it is used to implement the information reporting method according to any one of claims 1 to 46.

53. A computer program product, characterized in that, The computer program product includes computer instructions stored in a computer-readable storage medium, a processor retrieves the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions to implement the information reporting method as described in any one of claims 1 to 46.

Images