CSI reporting method and apparatus, device, and storage medium

Abstract

A channel state information (CSI) reporting method and apparatus, a device, and a storage medium, relating to the technical field of communications. The method comprises: a terminal device receives a measurement reference signal sent by a network device (410); and the terminal device sends to the network device visual antenna port information and first CSI that are determined on the basis of the measurement reference signal, or sends to the network device second CSI determined on the basis of the measurement reference signal, wherein the second CSI is CSI corresponding to the visual antenna port information and configured by the network device (420). The method can avoid power waste caused by network devices transmitting signals to terminal devices via non-visual antenna ports, thereby improving the utilization rate of antennas and the overall spectrum efficiency of cells.

Description

CSI reporting method, device, apparatus and storage medium TECHNICAL FIELD

[0001] Embodiments of the present application relate to the field of communication technology, in particular to a CSI (Channel State Information) reporting method, device, apparatus and storage medium. BACKGROUND

[0002] In the case of far-field communication, the terminal device and the network device are approximately plane wave transmission, and the antenna ports on the network device are all visible to the terminal device. The terminal device feeds back the CSI of the antenna ports to the network device, thereby informing the network device of the scheduling information of the terminal device such as the number of transmission layers, the precoding matrix, the sending beam and the modulation and coding mode.

[0003] However, in the case of near-field communication, due to antenna shielding and other reasons, part of the antenna ports on the network device are not visible to the terminal device. Therefore, the CSI feedback technology for the case of near-field communication needs further research.

[0004] SUMMARY

[0005] Embodiments of the present application provide a CSI reporting method, device, apparatus and storage medium. The technical solutions provided by the embodiments of the present application are as follows:

[0006] According to an aspect of the embodiments of the present application, a CSI reporting method is provided, which is executed by a terminal device, and the method comprises:

[0007] receiving a measurement reference signal sent by a network device;

[0008] sending visible antenna port information and first CSI determined based on the measurement reference signal to the network device, or sending second CSI corresponding to the visible antenna port information configured by the network device to the network device, the second CSI being the CSI corresponding to the visible antenna port information configured by the network device;

[0009] The visible antenna port information is used to indicate the visible antenna ports and / or non-visible antenna ports in the antenna ports of the network device.

[0010] According to an aspect of the embodiments of the present application, a CSI reporting method is provided, which is executed by a network device, and the method comprises:

[0011] sending a measurement reference signal to a terminal device;

[0012] receive visible antenna port information and first CSI determined by the terminal device based on the measurement reference signal, or receive second CSI determined by the terminal device based on the measurement reference signal, the second CSI being CSI corresponding to visible antenna port information configured by the network device;

[0013] The visible antenna port information is used to indicate visible antenna ports and / or non-visible antenna ports in antenna ports of the network device.

[0014] According to an aspect of an embodiment of the present application, a CSI reporting device is provided, and the device comprises:

[0015] The receiving module is configured to receive a measurement reference signal sent by a network device.

[0016] The sending module is configured to send, to the network device, visible antenna port information and first CSI determined based on the measurement reference signal, or send, to the network device, second CSI determined based on the measurement reference signal, the second CSI being CSI corresponding to visible antenna port information configured by the network device.

[0017] The visible antenna port information is used to indicate visible antenna ports and / or non-visible antenna ports in antenna ports of the network device.

[0018] According to an aspect of an embodiment of the present application, a CSI reporting device is provided, and the device comprises:

[0019] The sending module is configured to send, to a terminal device, a measurement reference signal.

[0020] The receiving module is configured to receive visible antenna port information and first CSI determined by the terminal device based on the measurement reference signal, or receive second CSI determined by the terminal device based on the measurement reference signal, the second CSI being CSI corresponding to visible antenna port information configured by the network device.

[0021] The visible antenna port information is used to indicate visible antenna ports and / or non-visible antenna ports in antenna ports of the network device.

[0022] According to an aspect of an embodiment of the present application, a terminal device is provided, and the terminal device comprises a processor and a memory, the memory stores a computer program, and the processor executes the computer program to implement the CSI reporting method of the terminal device side described above.

[0023] According to an aspect of an embodiment of the present application, a network device is provided, which comprises a processor and a memory, the memory storing a computer program, and the processor executing the computer program to implement the CSI reporting method on the network device side.

[0024] According to an aspect of an embodiment of the present application, a computer readable storage medium is provided, which stores a computer program, and the computer program is configured to be executed by a processor to implement the CSI reporting method on the terminal device side or the CSI reporting method on the network device side.

[0025] According to an aspect of an embodiment of the present application, a chip is provided, which comprises a programmable logic circuit and / or program instructions, and when the chip is running, the programmable logic circuit and / or program instructions are configured to implement the CSI reporting method on the terminal device side or the CSI reporting method on the network device side.

[0026] According to an aspect of an embodiment of the present application, a computer program product is provided, which comprises computer instructions stored in a computer readable storage medium, and a processor reads and executes the computer instructions from the computer readable storage medium to implement the CSI reporting method on the terminal device side or the CSI reporting method on the network device side.

[0027] The technical scheme provided by the embodiments of the present application can have the following beneficial effects:

[0028] The terminal device receives the measurement reference signal sent by the network device, and sends the visible antenna port information and the first CSI determined based on the measurement reference signal to the network device, or sends the second CSI determined based on the measurement reference signal to the network device. That is, by reporting the CSI corresponding to the visible antenna port information to the network device, the network device can obtain the CSI of the antenna port visible to the terminal device, thereby avoiding the network device from creating power on the non-visible antenna port to the terminal device, and improving the utilization rate of the antenna and the overall spectrum efficiency of the cell. BRIEF DESCRIPTION OF DRAWINGS

[0029] FIG. 1 is a schematic diagram of a network architecture provided by an embodiment of the present application;

[0030] FIG. 2 is a schematic diagram of a CSI reporting method with different periodicity provided by the related art;

[0031] FIG. 3 is a schematic diagram of the visibility region (VR) of different users provided by the related art;

[0032] FIG. 4 is a flowchart of a CSI reporting method provided by an embodiment of the present application;

[0033] Fig. 5 is a block diagram of a CSI reporting device according to an embodiment of the present application;

[0034] Fig. 6 is a block diagram of a CSI reporting device according to another embodiment of the present application;

[0035] Fig. 7 is a structural schematic diagram of a communication device according to an embodiment of the present application. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical scheme and advantages of the present application clearer, the embodiments of the present application will be further described in detail below with reference to the drawings.

[0037] The network architecture and service scenarios described in the embodiments of the present application are for more clearly illustrating the technical scheme of the embodiments of the present application, and do not constitute a limitation on the technical scheme provided by the embodiments of the present application. It can be known by those skilled in the art that, with the evolution of network architecture and the appearance of new service scenarios, the technical scheme provided by the embodiments of the present application is also applicable to similar technical problems.

[0038] The technical solutions of the embodiments of the present application can be applied to various communication systems, for example: Global System of 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, evolved system of NR system, LTE-based access to unlicensed spectrum (LTE-U) system, NR-based access to unlicensed spectrum (NR-U) system, non-terrestrial communication network system, Universal Mobile Telecommunication System (UMTS), Wireless Local Area Networks (WLAN), Wireless Fidelity (WiFi), 5th-Generation (5G) system, B5G (Beyond 5G) system, 6th-Generation (6G) system or other communication systems, etc.

[0039] Generally, the traditional communication system supports a limited number of connections, which is easy to implement. However, with the development of communication technology, the mobile communication system will not only support the traditional communication, but also support, for example, Device to Device (D2D) communication, Machine to Machine (M2M) communication, Machine Type Communication (MTC), Vehicle to Vehicle (V2V) communication, or Vehicle to everything (V2X) communication, etc. The embodiments of the present application can also be applied to these communication systems.

[0040] The communication system in the embodiments of the present application can be applied to a carrier aggregation (CA) scenario, can also be applied to a dual connectivity (DC) scenario, and can also be applied to a standalone (SA) network deployment scenario.

[0041] The communication system in the embodiments of the present application can be applied to an unlicensed spectrum, which can also be regarded as a shared spectrum, or can also be applied to a licensed spectrum, which can also be regarded as a non-shared spectrum.

[0042] The embodiments of the present application can be applied to a non-terrestrial network (NTN) system, and can also be applied to a terrestrial network (TN) system. The NTN generally adopts a satellite communication mode to provide communication services to ground users. The NTN system currently includes an NR-NTN and an IoT-NTN system, and other NTN systems can be included in the future.

[0043] Please refer to FIG. 1, which shows a schematic diagram of a network architecture 100 provided by an embodiment of the present application. The network architecture 100 can include a terminal device 10, an access network device 20, and a core network element 30.

[0044] The terminal device 10 can refer to a UE (User Equipment), an access terminal, a subscriber unit, a subscriber station, a mobile station, a mobile, a remote station, a remote terminal, a mobile device, a wireless communication device, a user agent, or a user equipment. In some embodiments, the terminal device 10 can also be a cellular phone, a cordless phone, a SIP (Session Initiation Protocol) phone, a WLL (Wireless Local Loop) station, a PDA (Personal Digital Assistant), a handheld device with wireless communication function, a computing device, or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, a terminal device in a 5GS (5th Generation System), or a terminal device in a future evolved PLMN (Public Land Mobile Network), etc., and the embodiments of the present application are not limited thereto. For the convenience of description, the above-mentioned devices are collectively referred to as terminal devices. The number of terminal devices 10 is usually multiple, and one or more terminal devices 10 can be distributed in a cell managed by each access network device 20. The terminal device can also be simply referred to as a terminal or a UE, and those skilled in the art can understand its meaning.

[0045] The access network device 20 is a device deployed in an access network to provide wireless communication functions for the terminal device 10. The access network device 20 can include various forms of macro base stations, micro base stations, relay stations, access points, and the like. In systems using different wireless access technologies, the names of devices with access network device functions can be different, for example, in a 5G NR system, it is called gNodeB or gNB. As communication technology evolves, the name of the "access network device" may change. For ease of description, in the embodiments of the present application, the above-mentioned devices that provide wireless communication functions for the terminal device 10 are collectively referred to as access network devices. In some embodiments, through the access network device 20, a communication relationship can be established between the terminal device 10 and the core network element 30. Illustratively, in the LTE (Long Term Evolution) system, the access network device 20 can be an EUTRAN (Evolved Universal Terrestrial Radio Access Network) or one or more eNodeBs in the EUTRAN; in the 5G NR system, the access network device 20 can be a RAN (Radio Access Network) or one or more gNBs in the RAN. In the embodiments of the present application, the "network device" refers to the access network device 20, such as a base station, unless otherwise specified.

[0046] The core network element 30 is a network element deployed in the core network, and the main functions of the core network element 30 are to provide user connection, manage users, and complete bearer for services, and provide an interface to external networks as a bearer network. For example, the core network element in the 5G NR system can include AMF (Access and Mobility Management Function) entities, UPF (User Plane Function) entities, and SMF (Session Management Function) entities.

[0047] In some embodiments, the access network device 20 and the core network element 30 communicate with each other through some air interface technology, such as the NG interface in the 5G NR system. The access network device 20 and the terminal device 10 communicate with each other through some air interface technology, such as the Uu interface.

[0048] The "5G NR system" in the embodiments of the present application can also be referred to as a 5G system or an NR system, but those skilled in the art can understand its meaning. The technical solutions described in the embodiments of the present application can be applicable to the LTE system, and can also be applicable to the 5G NR system, and can also be applicable to the subsequent evolution system (for example, the B5G system, the 6G system (6th Generation System, the sixth generation mobile communication system)) of the 5G NR system, and can also be applicable to other communication systems such as the NB-IoT (Narrow Band Internet of Things, narrowband Internet of Things) system, and the present application does not limit this.

[0049] In the embodiments of the present application, the network device can provide services for a cell, and a terminal device communicates with the network device through a transmission resource (for example, a frequency domain resource, or a spectrum resource) on a carrier used by the cell. The cell can be a cell corresponding to the network device (for example, a base station), and the cell can belong to a macro base station or a base station corresponding to a small cell (Small cell). The small cell can include a metro cell, a micro cell, a pico cell, a femto cell, and the like. These small cells have the characteristics of small coverage and low transmit power, and are suitable for providing high-rate data transmission services.

[0050] Before introducing the technical solutions of the present application, the related technologies involved in the present application are introduced and explained. The following related technologies can be combined with the technical solutions of the embodiments of the present application in any way, and all belong to the protection scope of the embodiments of the present application. The embodiments of the present application include at least part of the following contents.

[0051] 1. Introduction of CSI feedback

[0052] In order for the network device to perform reasonable scheduling, the terminal device needs to feed back downlink CSI to enable the base station to determine the scheduling information of the terminal device such as the number of transmission layers, the precoding matrix, the transmission beam, and the modulation and coding mode. Specifically, the CSI reporting of the terminal device is based on the CSI reporting configuration indicated by the network device and the CSI-RS (Channel State Information-Reference Signal) signal sent by the network device. The uplink resource used by the terminal device to report the CSI and the CSI-RS signal used for CSI measurement are both indicated by the CSI reporting configuration. Each CSI reporting configuration corresponds to one CSI reporting, and each CSI reporting can contain different information such as CRI (CSI-RS Resource Indicator), RI (Rank Indicator), PMI (Precoding Matrix Indicator), and CQI (Channel Quality Indicator). These information are obtained based on the CSI-RS signal configured and sent by the network device. Specifically, what content / information is contained in the CSI is determined by the reporting quantity information (reportQuantity) in the CSI reporting configuration. The reporting quantity information can indicate at least one of the following reporting quantities.

[0053] Among them,

[0054] The CRI is used to determine the CSI-RS resource currently used for channel measurement and the IMR (Interference Measurement Resource) currently used for interference measurement from a plurality of CSI-RS resources;

[0055] The RI is used to report the recommended number of transmission layers;

[0056] The PMI is used to determine the recommended precoding matrix from a predefined codebook;

[0057] The CQI is used to report the current channel quality.

[0058] The RSRP (Reference Signal Receiving Power) is used to report the RSRP of the SSB (Synchronous Signal Block) or CSI-RS corresponding to the index fed back, thereby used for the network side to determine the beam used for downlink transmission.

[0059] LI is used to report the index of the transmission layer associated with the phase tracking reference signal.

[0060] Wherein, the RI / PMI / CQI can be determined based on the SINR (Signal to Interference plus Noise Ratio) estimated by the terminal device. The channel part in the SINR is determined based on the non-zero power CSI-RS configured by the network for channel measurement, and the interference part is determined based on the CSI-IM or non-zero power CSI-RS configured by the network for interference measurement. Wherein, the CSI-RS resource for channel measurement can contain multiple antenna ports, which is used to measure the complete channel of the downlink to calculate the CSI. On the other hand, the codebook used to determine the PMI can have two codebooks: normal codebook and port selection codebook. Wherein, the normal codebook requires the terminal device to select part of the beams from multiple beams and feedback through the codebook parameters; the port selection codebook requires the terminal device to select part of the antenna ports from multiple antenna ports, and feedback through the codebook parameters, each antenna port corresponds to a beam.

[0061] There are three periodic reporting modes for CSI reporting of terminal devices: periodic CSI, quasi-persistent CSI and aperiodic CSI. As shown in FIG. 2, the periodic CSI is transmitted on a PUCCH (Physical Uplink Control Channel), and the CSI reporting configuration thereof is configured by RRC (Radio Resource Control). After the terminal device receives the corresponding RRC configuration, the terminal device periodically reports the CSI. The quasi-persistent CSI can be transmitted on a PUCCH or a PUSCH (Physical Uplink Shared Channel). The CSI corresponding to the CSI reporting configuration transmitted on the PUCCH is pre-configured by RRC signaling and activated or deactivated by MAC (Medium Access Control) layer signaling. The CSI corresponding to the CSI reporting configuration transmitted on the PUSCH is dynamically indicated (activated or deactivated) by DCI (Downlink control information) signaling. After the terminal device receives the activation or indication signaling configured by the network, the terminal device periodically transmits the CSI on the PUCCH or the PUSCH until the deactivation signaling is received. The aperiodic CSI reporting corresponds to the CSI reporting configuration pre-configured by RRC signaling. Part of the configuration can be activated by MAC layer signaling, and the CSI reporting configuration for CSI reporting is indicated by the CSI triggering signaling in the DCI. After the terminal device receives the CSI triggering signaling, the terminal device reports the corresponding CSI on the scheduled PUSCH according to the indicated CSI reporting configuration.

[0062] 2. Visible region in near field communication

[0063] In a super large-scale MIMO (Multiple Input Multiple Output) system, the array size is large, and when a user approaches the array, the channel between the user and the network device becomes a near-field channel. At this time, the channel energy is only concentrated on part of the antennas, and the array on which the channel energy is concentrated is called a visible region. Specifically, due to the shielding of a scatterer or an obstacle, or the angle of part of the antennas is large (resulting in low energy of the antenna array in this direction), the received power of part of the antennas is low and becomes invisible. For example, considering an actual scenario in which a scatterer or an obstacle exists, the scatterer is usually divided into multiple clusters, and the corresponding visible region of each cluster is different, ultimately resulting in different antenna ports visible to different users, as shown in FIG. 3.

[0064] The CSI feedback mechanism in the related art is based on the assumption of far-field communication, i.e., the UE and the network device are approximately in plane wave transmission. With the increase of the number and size of antennas, the UE and the network device gradually become a near-field channel, and then some antennas are blocked by scatterers / obstacles, or some antennas are obviously weaker than other antennas due to the angle and distance. These antennas can be considered invisible to the UE. Since the invisible antenna ports of different UEs are different, and these ports may be distributed relatively dispersedly and irregularly, the network device cannot know which antenna ports are invisible to the UE, or cannot make the terminal device only report the CSI of the visible ports, and the transmission on these antenna ports will cause power waste.

[0065] Please refer to FIG. 4, which shows a flowchart of a CSI reporting method provided by an embodiment of the present application. The method can be applied to the network architecture shown in FIG. 1. The method can include the following step 410.

[0066] Step 410, the network device sends a measurement reference signal to the terminal device.

[0067] Correspondingly, the terminal device receives the measurement reference signal sent by the network device.

[0068] In some embodiments, the measurement reference signal is a reference signal for determining channel state information. Illustratively, the measurement reference signal is a CSI-RS. Illustratively, the measurement reference signal is used for measuring the CSI of the downlink channel.

[0069] In some embodiments, the terminal device obtains the channel information of the downlink based on the measurement reference signal. Illustratively, the channel information of the downlink includes a channel matrix for indicating the downlink channel. Illustratively, the downlink channel includes at least one of a PDSCH (Physical Downlink Shared Channel) and a PDCCH (Physical Downlink Control Channel).

[0070] Step 420, the terminal device sends the visible antenna port information and the first CSI determined based on the measurement reference signal to the network device, or sends the second CSI determined based on the measurement reference signal to the network device, the second CSI being the CSI corresponding to the visible antenna port information configured by the network device.

[0071] Correspondingly, the network device receives the visible antenna port information and the first CSI determined by the terminal device based on the measurement reference signal, or receives the second CSI determined by the terminal device based on the measurement reference signal, the second CSI being the CSI corresponding to the visible antenna port information configured by the network device.

[0072] The visual antenna port information is used to indicate a visual antenna port and / or a non-visual antenna port in the antenna ports of the network device.

[0073] In some embodiments, the visual antenna port information is used to indicate a visual antenna port in the antenna ports of the network device. In some embodiments, the visual antenna port information is used to indicate a non-visual antenna port in the antenna ports of the network device. In some embodiments, the visual antenna port information is used to indicate a visual antenna port and a non-visual antenna port in the antenna ports of the network device.

[0074] In some embodiments, the antenna ports of the network device respectively correspond to port identities. In some embodiments, when the visual antenna port information is used to indicate a visual antenna port in the antenna ports of the network device, the port identities respectively corresponding to the visual antenna ports are taken as the visual antenna port information. In some embodiments, when the visual antenna port information is used to indicate a non-visual antenna port in the antenna ports of the network device, the port identities respectively corresponding to the non-visual antenna ports are taken as the visual antenna port information. In some embodiments, the port identity is used to indicate an antenna port. In some embodiments, the port identity and the antenna port are in one-to-one correspondence. In some embodiments, the port identity is a port number. Exemplarily, different antenna ports correspond to different numbers. Exemplarily, the corresponding antenna port can be determined by the number.

[0075] In some embodiments, the visual antenna port information is obtained by respectively encoding the visual antenna ports and the non-visual antenna ports in the antenna ports of the network device. Exemplarily, the visual antenna ports are encoded as 1 and the non-visual antenna ports are encoded as 0, and the obtained encoding sequence is considered as the visual antenna port information.

[0076] In some embodiments, the antenna ports of the network device are the antenna ports on the network device. Exemplarily, the antenna ports of the network device are the antenna ports for measuring the reference signal. Exemplarily, the antenna ports on the network device include other antenna ports in addition to the antenna ports for measuring the reference signal. In some embodiments, the antenna ports for measuring the reference signal correspond to the visual antenna ports in the antenna ports of the network device. In some embodiments, the non-visual antenna ports in the antenna ports of the network device are not the antenna ports for measuring the reference signal. In some embodiments, the union of the antenna ports for measuring the reference signal and the non-visual antenna ports in the antenna ports of the network device is all the antenna ports on the network device.

[0077] In some embodiments, the antenna ports of the network device are the antenna ports for measuring the reference signal. For example, the number of the antenna ports for measuring the reference signal is N, and the number of the antenna ports of the network device is also N, where N is a positive integer. In this case, the visible antenna port information indicates the visible antenna ports and / or the non-visible antenna ports among the antenna ports of the network device, i.e., indicates the visible antenna ports and / or the non-visible antenna ports among the antenna ports for measuring the reference signal.

[0078] In some embodiments, when the visible antenna port information indicates the visible antenna ports among the antenna ports of the network device, the other antenna ports not indicated among the antenna ports of the network device are the non-visible antenna ports. In some embodiments, when the visible antenna port information indicates the non-visible antenna ports among the antenna ports of the network device, the other antenna ports not indicated among the antenna ports of the network device are the visible antenna ports.

[0079] In some embodiments, the first CSI is the CSI corresponding to the visible antenna port information determined by the terminal device. In some embodiments, the first CSI is the CSI corresponding to the visible antenna ports indicated by the terminal device based on the visible antenna port information.

[0080] In some embodiments, the terminal device determines the visible antenna port information and the first CSI based on the reference signal. In some embodiments, the terminal device sends the visible antenna port information and the first CSI to the network device.

[0081] In some embodiments, after receiving the reference signal, the terminal device measures each port of the reference signal respectively to determine the visible antenna port information. For example, the terminal device measures each port of the reference signal respectively to determine the visible antenna ports. For example, the terminal device measures each port of the reference signal respectively to determine the non-visible antenna ports. For example, the terminal device measures each port of the reference signal respectively to determine the visible antenna ports and the non-visible antenna ports.

[0082] In some embodiments, the terminal device determines the visible antenna port information according to the measured RSRP of each port of the measurement reference signal. For example, the terminal device determines a port of each port of the measurement reference signal as a non-visible antenna port if the measured RSRP of the port is lower than a first threshold value. For example, the terminal device determines a port of each port of the measurement reference signal as a visible antenna port if the measured RSRP of the port is higher than a second threshold value. In some embodiments, the first threshold value is less than or equal to the second threshold value. In some embodiments, the first threshold value and the second threshold value are determined by the terminal device itself or indicated to the terminal device by the network device. In some embodiments, the network device transmits indication information for indicating the first threshold value and the second threshold value at the same time when transmitting the measurement reference signal to the terminal device.

[0083] In some embodiments, the antenna port of the measurement reference signal corresponds to a visible antenna port in the antenna ports of the network device. For example, the terminal device determines the antenna port of the measurement reference signal as a visible antenna port in the antenna ports of the network device according to the received antenna port of the measurement reference signal.

[0084] In some embodiments, the network device receives the visible antenna port information determined by the terminal device based on the measurement reference signal and the first CSI.

[0085] In some embodiments, the network device can perform data transmission of the terminal device according to the first CSI on the visible antenna port determined based on the visible antenna port information. The network device can not transmit data of the terminal device on the non-visible antenna port, thereby saving the transmission power. Meanwhile, the network device can transmit data of other terminal devices on the antenna port, thereby achieving higher utilization of the antenna port.

[0086] In some embodiments, the second CSI is the CSI corresponding to the visible antenna port information configured by the network device. In some embodiments, the terminal device receives the visible antenna port information transmitted by the network device, determines the second CSI based on the visible antenna port information, and transmits the second CSI to the network device.

[0087] In some embodiments, the network device transmits the visible antenna port information to the terminal device.

[0088] In some embodiments, the network device determines the visible antenna port and / or the non-visible antenna port in the antenna ports based on the channel reciprocity between the uplink and the downlink by detecting the uplink signal, thereby determining the visible antenna port information. In some embodiments, the uplink signal is a sounding reference signal (SRS).

[0089] In some embodiments, the network device can determine whether an antenna port is a visible antenna port according to the signal strength received on the antenna port. In some embodiments, the network device determines an antenna port as a visible antenna port if the signal strength received on the antenna port is greater than a third threshold value. In some other embodiments, the network device determines an antenna port as a non-visible antenna port if the signal strength received on the antenna port is less than a fourth threshold value. In some embodiments, the third threshold value is greater than or equal to the fourth threshold value. Exemplarily, the third threshold value and the fourth threshold value are preset by the network device.

[0090] In some embodiments, the terminal device receives visible antenna port information. The visible antenna port information can indicate visible antenna ports of the network device, or can indicate non-visible antenna ports of the network device, or can indicate both visible antenna ports and non-visible antenna ports of the network device.

[0091] In some embodiments, the antenna ports of the network device are the antenna ports for measuring the reference signal. In some embodiments, the number of the antenna ports for measuring the reference signal is N, and the number of the antenna ports of the network device is also N.

[0092] In some embodiments, the number of the antenna ports of the network device is indicated to the terminal device by the network device (i.e. the number of the complete antenna ports in the downlink), and the antenna ports for measuring the reference signal correspond to the visible antenna ports of the antenna ports of the network device. In some embodiments, the number of the antenna ports of the network device is N, and the number of the visible antenna ports, i.e. the number of the antenna ports for measuring the reference signal, is M, where M is less than or equal to N.

[0093] In some embodiments, the visible antenna port information can be indicated by high layer signaling or by DCI signaling. In some embodiments, the visible antenna port information can be placed in the CSI reporting configuration as part of the CSI parameters, and is sent by the network device to the terminal device for CSI measurement and reporting.

[0094] In some embodiments, the network device sends CSI configuration information (i.e. CSI reporting configuration) to the terminal device. In some embodiments, the CSI configuration information includes configuration information of the reference signal for measurement. In some embodiments, the CSI configuration information can also include visible antenna port information.

[0095] In some embodiments, the network device sends the reference signal for measurement to the terminal device. The configuration information of the reference signal for measurement can be sent together with the visible antenna port information in the CSI configuration information, and they can both be used for reporting of the same CSI.

[0096] In some embodiments, the terminal device determines the second CSI based on the measurement of the reference signal. In some embodiments, the terminal device sends the second CSI to the network device. In some embodiments, the terminal device determines the CSI corresponding to the visible antenna port information, i.e., the second CSI, based on the measurement of the reference signal.

[0097] In some embodiments, the second CSI is the CSI corresponding to the visible antenna port of the network device.

[0098] In some embodiments, the network device receives the second CSI and schedules the downlink transmission based on the second CSI.

[0099] In some embodiments, the network device can transmit data of the terminal device according to the second CSI on the visible antenna port. On the other non-visible antenna ports, the network device can not transmit data of the terminal device, thereby saving the transmission power. Meanwhile, the network device can transmit data of other terminal devices on these ports, thereby achieving higher utilization of the antenna ports.

[0100] In some embodiments, the terminal device can determine whether to report the visible antenna port information and the first CSI or to report the second CSI according to the CSI reporting configuration.

[0101] In some embodiments, the terminal device determines whether to report the visible antenna port information and the first CSI according to the CSI reporting configuration. In some embodiments, whether to report the visible antenna port information and the first CSI is determined according to whether the reporting amount in the CSI reporting configuration contains the visible antenna port information. In some embodiments, if the reporting amount in the CSI reporting configuration contains the visible antenna port information, the visible antenna port information and the first CSI need to be reported.

[0102] In some embodiments, the terminal device determines whether to report the second CSI according to the visible antenna port information indicated by the network device according to the CSI reporting configuration. In some embodiments, whether to report the second CSI according to the visible antenna port information indicated by the network device is determined according to whether the CSI reporting configuration contains the visible antenna port information. In some embodiments, if the reporting amount in the CSI reporting configuration does not contain the visible antenna port information, the second CSI needs to be reported.

[0103] The terminal device can report visible antenna port information and corresponding first CSI, or report second CSI corresponding to the visible port configured by the network device, so that the network device does not transmit signals of the terminal on these ports, or transmits signals of other terminal devices on these ports, thereby reducing the overhead of CSI on the one hand, and avoiding power waste caused by the network device on the non-visible antenna port to the terminal device on the other hand.

[0104] The terminal device can report second CSI corresponding to the visible port configured by the network device, which can reduce the overhead of CSI and the complexity of measuring CSI of the terminal device (only the visible antenna port needs to be measured) on the one hand, and can avoid power waste caused by the network device on the non-visible antenna port to the terminal, thereby improving the utilization of the antenna and the spectral efficiency of the whole cell.

[0105] In some embodiments, the visible antenna port information includes at least one bit, and each bit is used to indicate that an antenna port of the network device or an antenna port in a group of antenna ports is a visible antenna port or a non-visible antenna port. Here, the antenna port of the network device can be an antenna port for measuring a reference signal.

[0106] In some embodiments, if the value of the bit is a first value, the antenna port of the network device indicated by the bit is a visible antenna port. In some embodiments, if the value of the bit is the first value, the antenna port in the group of antenna ports of the network device indicated by the bit is a visible antenna port.

[0107] In some embodiments, if the value of the bit is a second value, the antenna port of the network device indicated by the bit is a non-visible antenna port. In some embodiments, if the value of the bit is the second value, the antenna port in the group of antenna ports of the network device indicated by the bit is a non-visible antenna port.

[0108] In some embodiments, the first value and the second value are different values. For example, the first value is 1, and the second value is 0.

[0109] In some embodiments, if each bit is used to indicate an antenna port of the network device, the total length of the at least one bit included in the visible antenna port information is equal to the number of antenna ports of the network device.

[0110] In some embodiments, if each bit is used to indicate a group of antenna ports of the network device, the total length of the at least one bit included in the visible antenna port information is equal to the number of groups of antenna ports of the network device. In some embodiments, the division of the groups of antenna ports in the network device, such as the total number of groups of antenna ports and the number of antenna ports in each group of antenna ports, is determined in advance by the terminal device or the network device. When determined by the network device, the network device indicates the relevant information of the groups of antenna ports (the total number of groups of antenna ports and the number of antenna ports in each group of antenna ports) to the terminal device. In some embodiments, the number of antenna ports in each group of antenna ports can be the same or different.

[0111] In some embodiments, the number of antenna ports in each group of antenna ports is consistent. In some embodiments, the kth group of antenna ports contains antenna ports (k-1)*m~k*m-1, where m is the number of antenna ports contained in each group of antenna ports. For example, assuming that the number of antenna ports of the network device is 32 and each group of antenna ports contains 4 antenna ports, there are a total of 8 groups of antenna ports. Then the visible antenna port information can be 11001110, indicating that the 1st, 2nd, 5th, 6th, and 7th groups of antenna ports (i.e., antenna ports 0-7 and antenna ports 16-28) are visible antenna ports, and the 3rd, 4th, and 8th groups of antenna ports (i.e., antenna ports 8-15 and antenna ports 28-31) are non-visible antenna ports.

[0112] In some embodiments, the visible antenna port information includes indication information of one or more groups of antenna ports, each group of antenna ports containing one or a plurality of consecutive visible antenna ports, or each group of antenna ports containing one or a plurality of consecutive non-visible antenna ports.

[0113] In some embodiments, the visible antenna port information includes indication information of one or more groups of antenna ports, each group of antenna ports containing a plurality of consecutive visible antenna ports, or each group of antenna ports containing a plurality of consecutive non-visible antenna ports.

[0114] In some embodiments, the visible antenna port information includes indication information of one or more groups of antenna ports, wherein some groups of antenna ports contain one visible antenna port and some groups of antenna ports contain a plurality of visible antenna ports, and the number of visible antenna ports contained in different groups of antenna ports can be different.

[0115] In some embodiments, the visible antenna port information includes indication information of one or more groups of antenna ports, wherein some groups of antenna ports contain one non-visible antenna port and some groups of antenna ports contain a plurality of non-visible antenna ports, and the number of non-visible antenna ports contained in different groups of antenna ports can be different.

[0116] In some embodiments, the indication information of the antenna port group is used to indicate at least one of the following information: a starting antenna port of the antenna port group, a number of antenna ports contained in the antenna port group.

[0117] In some embodiments, the indication information of the antenna port group is used to indicate a starting antenna port of the antenna port group. In some embodiments, the number of antenna ports of the network device is N, then the information of the starting antenna port of each antenna port group can be respectively indicated by log2(N) bits to indicate the port index. Conversely, the port index is indicated by M bits, which can indicate 2M MThe quantity of antenna ports, i.e., the information of the starting antenna port of each antenna port group, can be indexed, and N and M are positive integers. In this case, the quantity of ports within each antenna port group is configured to the terminal device by the network device through high-layer signaling. In some embodiments, in order to reduce signaling overhead, the starting positions of multiple antenna port groups can be jointly indicated. When the quantity of antenna port groups is K, the information of the starting antenna port of the K antenna port groups can be indicated by log2(C(N, K)) bits, where C(N, K) represents all possibilities of selecting K antenna ports from N antenna ports. In some embodiments, the indication information of the antenna port groups is reported by the terminal device to the network device. For example, the terminal device reports the starting antenna port of the antenna port group to the network device through visible antenna port information. In this case, the quantity K of antenna port groups and the quantity of ports within each antenna port group are configured to the terminal device by the network device through high-layer signaling. In other embodiments, the indication information of the antenna port groups is configured to the terminal device by the network device. For example, the network device sends a CSI reporting configuration to the terminal device, and the CSI reporting configuration carries visible antenna port information, which includes the indication information of one or more antenna port groups. In some embodiments, the terminal device determines the starting antenna port from the antenna port group of the network device according to the port index of the starting antenna port in the indication information of the antenna port groups. In some embodiments, the indication information of the antenna port groups is used to indicate the starting antenna port of the antenna port group and the quantity of antenna ports included in the antenna port group. In some embodiments, the starting antenna port of each antenna port group can be indicated by log2(N) bits respectively, and the quantity of antenna ports of each antenna port group can be indicated by log2(L) bits respectively, where N is the quantity of antenna ports of the network device, and L is the maximum quantity of antenna ports included in the antenna port group. In some embodiments, the quantities of antenna ports of different antenna port groups are the same, and the quantity of antenna ports of all antenna port groups can be indicated by log2(L) bits. In some embodiments, the indication information of the antenna port groups is reported by the terminal device to the network device. In some embodiments, the network device can preconfigure several groups of combinations of {starting antenna port index, quantity of ports in the group}, and the terminal device selects a suitable combination from the groups and reports the combination to the network device through visible antenna port information. In other embodiments, the indication information of the antenna port groups is configured to the terminal device by the network device. For example, the network device sends a CSI reporting configuration to the terminal device, and the CSI reporting configuration carries visible antenna port information, which includes the indication information of one or more antenna port groups.In some embodiments, the terminal device determines, from the antenna port group of the network device, a plurality of antenna ports corresponding to the number of antenna ports contained in the antenna port group starting from the starting antenna port, according to the starting antenna port index and the number of antenna ports contained in the antenna port group in the indication information of the antenna port group.

[0118] In some embodiments, the indication information of the antenna port group is used to indicate the terminal antenna port of the antenna port group. In some embodiments, the number of antenna ports of the network device is N, and the information of the terminal antenna port of each antenna port group can be indicated by log2(N) bits of port index respectively. In some embodiments, in order to reduce the signaling overhead, the terminal positions of a plurality of antenna port groups can be jointly indicated. When the number of antenna port groups is K, the information of the terminal antenna port of K antenna port groups can be indicated by log2(C(N, K)) bits, where C(N, K) represents all possibilities of selecting K antenna ports from N antenna ports. In some embodiments, the indication information of the antenna port group is reported by the terminal device to the network device. For example, the terminal device reports the terminal antenna port of the antenna port group to the network device through the visual antenna port information. In this case, the number K of antenna port groups and the number of ports in each antenna port group are configured by the network device to the terminal device through high layer signaling. In other embodiments, the indication information of the antenna port group is configured by the network device to the terminal device. For example, the network device sends a CSI reporting configuration to the terminal device, and the CSI reporting configuration carries visual antenna port information including the indication information of one or more antenna port groups. In some embodiments, the terminal device determines the terminal antenna port from the antenna port group of the network device according to the terminal antenna port index in the indication information of the antenna port group.

[0119] In some embodiments, the indication information of the antenna port group is used to indicate the terminal antenna port of the antenna port group and the number of antenna ports contained in the antenna port group. In some embodiments, the terminal antenna port of each antenna port group can be respectively indicated by log2(N) bits, and the number of antenna ports of each antenna port group can be respectively indicated by log2(L) bits, where N is the number of antenna ports of the network device, and L is the maximum number of antenna ports contained in the antenna port group. In some embodiments, the number of antenna ports of different antenna port groups is the same, and the number of antenna ports of all antenna port groups can be indicated by log2(L) bits. In some embodiments, the indication information of the antenna port group is reported by the terminal device to the network device. For example, the terminal device reports the terminal antenna port of the antenna port group and the number of antenna ports contained in the antenna port group to the network device through the visual antenna port information. In some embodiments, the network device can be pre-configured with several groups of combinations of {terminal antenna port index, number of ports in the group}, and the terminal device selects a suitable combination from the combinations and reports it to the network device through the visual antenna port information. In other embodiments, the indication information of the antenna port group is configured by the network device to the terminal device. For example, the network device sends a CSI reporting configuration to the terminal device, and the CSI reporting configuration carries visual antenna port information, which includes the indication information of one or more antenna port groups. In some embodiments, the terminal device determines, from the antenna port group of the network device, a plurality of antenna ports corresponding to the number of antenna ports contained in the antenna port group, with the terminal antenna port as the terminal, according to the port index of the terminal antenna port and the number of antenna ports contained in the antenna port group in the received indication information of the antenna port group.

[0120] In some embodiments, the indication information of the antenna port group is used to indicate a starting antenna port and a terminal antenna port of the antenna port group. In some embodiments, the number of antenna ports of the network device is N, the starting antenna port of each antenna port group can be indicated by log2(N) bits of port index respectively, and the terminal antenna port of each antenna port group can also be indicated by log2(N) bits of port index respectively. Exemplarily, (log2(N)+log2(N)) bits are used to indicate the starting antenna port and the terminal antenna port of the antenna port group. Exemplarily, the first log2(N) bits of (log2(N)+log2(N)) bits are used to indicate the starting antenna port of the antenna port group, and the second log2(N) bits of (log2(N)+log2(N)) bits are used to indicate the terminal antenna port of the antenna port group. Exemplarily, the first log2(N) bits of (log2(N)+log2(N)) bits are used to indicate the terminal antenna port of the antenna port group, and the second log2(N) bits of (log2(N)+log2(N)) bits are used to indicate the starting antenna port of the antenna port group. In some embodiments, the indication information of the antenna port group is reported by the terminal device to the network device. Exemplarily, the terminal device reports the starting antenna port and the terminal antenna port of the antenna port group to the network device through the visual antenna port information. In some embodiments, the network device can be pre-configured with a plurality of combinations of {starting antenna port index, terminal antenna port index}, and the terminal device selects a suitable combination therefrom and reports it to the network device through the visual antenna port information. In other embodiments, the indication information of the antenna port group is configured by the network device to the terminal device. Exemplarily, the network device sends a CSI reporting configuration to the terminal device, and the CSI reporting configuration carries visual antenna port information including indication information of one or more antenna port groups. In some embodiments, the terminal device determines a plurality of antenna ports corresponding to the starting antenna port and the terminal antenna port from the antenna port group of the network device upon receiving the port index of the starting antenna port and the port index of the terminal antenna port in the indication information of the antenna port group.

[0121] In some embodiments, the number of antenna port groups and / or the number of antenna ports included in each antenna port group is configured to the terminal device by the network device. In some embodiments, the number of antenna port groups is configured to the terminal device by the network device. In some embodiments, the number of antenna ports included in each antenna port group is configured to the terminal device by the network device. In some embodiments, the number of antenna port groups and the number of antenna ports included in each antenna port group is configured to the terminal device by the network device. In some embodiments, the number of antenna port groups K and the maximum number of antenna ports L included in one antenna port group can be pre-agreed between the network device and the terminal device, or configured to the terminal device by the network device through higher layer signaling.

[0122] In some embodiments, the total number of visible antenna ports indicated by the visible antenna port information is a value in a first agreed set; and / or, the total number of non-visible antenna ports indicated by the visible antenna port information is a value in a second agreed set.

[0123] In some embodiments, the total number of visible antenna ports indicated by the visible antenna port information is a value in a first agreed set, and the total number of non-visible antenna ports indicated by the visible antenna port information is a value in a second agreed set. In some embodiments, the total number of visible antenna ports indicated by the visible antenna port information is a value in a first agreed set. In some embodiments, the total number of non-visible antenna ports indicated by the visible antenna port information is a value in a second agreed set. In some embodiments, the first agreed set and the second agreed set are the same or different agreed sets. In some embodiments, the first agreed set or the second agreed set is determined by the terminal device or the network device. In some embodiments, if the first agreed set or the second agreed set is determined by the network device, the network device indicates the first agreed set and the second agreed set to the terminal device. In some embodiments, the first agreed set and the second agreed set are the same agreed set. Exemplarily, the values in the agreed set include the number of CSI-RS ports supported in the protocol or a multiple of 4.

[0124] In some embodiments, the total number of visible antenna ports indicated by the visible antenna port information is a value in an agreed set, or the total number of non-visible antenna ports indicated by the visible antenna port information is a value in an agreed set. In some embodiments, in order to reuse the codebook design in the related art, the total number of visible antenna ports can be the number of CSI-RS ports supported in the protocol or a multiple of 4. In some embodiments, the agreed set can be {1, 2, 4, 8, 12, 16, 20, 24, 32, 48, 64, 128}.

[0125] In some embodiments, the first CSI or the second CSI includes a PMI of N antenna ports, wherein a part of the PMI corresponding to the non-visible antenna ports is set to zero, or the PMI is obtained based on first channel information, wherein a part of the first channel information corresponding to the non-visible antenna ports is set to zero, and N is a total number of antenna ports of the network device.

[0126] In some embodiments, the first CSI or the second CSI includes a PMI of N antenna ports, wherein a part of the PMI corresponding to the non-visible antenna ports is set to zero. In some embodiments, the PMI corresponds to one antenna port for each row, and the rows corresponding to the non-visible antenna ports can be set to zero. Other information in the first CSI or the second CSI, such as RI and CQI, can be calculated based on the PMI.

[0127] In some embodiments, the first CSI or the second CSI includes a PMI of N antenna ports, wherein the PMI is obtained based on first channel information, wherein a part of the first channel information corresponding to the non-visible antenna ports is set to zero. In some embodiments, the first channel information is a channel matrix, wherein a channel (column) of the channel matrix corresponding to the non-visible antenna ports is set to zero, and the PMI is calculated based on the first channel information after being set to zero. Other information in the first CSI or the second CSI, such as RI and CQI, can be calculated based on the PMI.

[0128] In some embodiments, the first CSI or the second CSI includes only CSI corresponding to visible antenna ports.

[0129] In some embodiments, the first CSI or the second CSI includes a PMI of M antenna ports, and M is a number of visible antenna ports; wherein the PMI of the M antenna ports is determined based on at least one of the following information: a codebook of the M antenna ports agreed upon, visible antenna port information, and an AI model used for compressing the PMI.

[0130] In some embodiments, since the PMI corresponds to M antenna ports, the PMI can be obtained by using a codebook of M antenna ports in related technologies, or a new codebook for near field communication can be introduced.

[0131] In some embodiments, the PMI can also be obtained based on visible antenna port information, i.e., determined according to the positions of the visible antenna ports in the antenna ports of the network device. In some embodiments, the PMI feedback information is related to the positions of the visible antenna ports. In some embodiments, the PMI information is calculated based on a plurality of groups of continuous visible antenna ports.

[0132] In some embodiments, the PMI is obtained based on AI model inference, and the visual antenna port information can be used as the input of the model, so that the model outputs the PMI corresponding to the compressed CSI of the visual antenna port.

[0133] In some embodiments, the visual antenna ports in the antenna ports of the network device include one or more antenna port groups, each antenna port group includes a plurality of continuous visual antenna ports, and different antenna port groups are discontinuous. The PMI in the first CSI or the second CSI includes at least one of the following information: beam information corresponding to each antenna port group respectively, frequency domain basis information corresponding to each antenna port group respectively, weighting coefficient information corresponding to each antenna port group respectively, weighting coefficient information between the plurality of antenna port groups, frequency domain basis information common to the plurality of antenna port groups, joint weighting coefficient information of the plurality of antenna port groups, and PMI information corresponding to each antenna port group respectively.

[0134] In some embodiments, the visual antenna ports in the antenna ports of the network device include one or more antenna port groups, each antenna port group includes a plurality of continuous visual antenna ports, and different antenna port groups are discontinuous. In some embodiments, assuming that the number of antenna ports of the network device is N = 32, the visual antenna ports can be {9-15, 20-31}, and the other ports are non-visual antenna ports, wherein the ports {9-15} are one antenna port group, and the ports {20-31} are another antenna port group, which are not continuous antenna port groups (separated by non-visual antenna ports).

[0135] In some embodiments, the PMI in the first CSI or the second CSI includes one or more of the following information.

[0136] 1. Beam information corresponding to each antenna port group respectively. The beam information, also referred to as spatial domain basis (SD basis) indication information, is used to indicate a plurality of beams (SD basis). In some embodiments, the PMI includes a plurality of beam information, each corresponding to a visual antenna port group.

[0137] 2. Frequency domain basis (FD basis) information corresponding to each antenna port group respectively. In some embodiments, the information is used to indicate a plurality of DFT vectors as frequency domain bases. That is, the PMI includes a plurality of frequency domain basis information, each corresponding to a visual antenna port group.

[0138] 3. Weighting coefficient information corresponding to each antenna port group. In some embodiments, the weighting coefficient can be the weighting coefficient between two polarization directions. In some embodiments, the weighting coefficient can also be the weighting coefficient corresponding to each frequency domain basis. In some embodiments, the weighting coefficient can also be the weighting coefficient corresponding to the combination of each frequency domain basis and spatial domain basis. In some embodiments, the PMI contains multiple weighting coefficient information, each of which corresponds to a visible antenna port group.

[0139] 4. Weighting coefficient information between multiple antenna port groups. In some embodiments, the information can indicate the weighting coefficient of other antenna port groups relative to the reference antenna port group.

[0140] 5. Frequency domain basis information common to the antenna port groups. In some embodiments, multiple antenna port groups can use common frequency domain basis, and this information is used for all antenna port groups.

[0141] 6. Joint weighting coefficient information of the antenna port groups. The joint weighting coefficient information can be used for all antenna port groups. In some embodiments, each weighting coefficient corresponds to a group of frequency domain basis and spatial domain basis.

[0142] 7. PMI information corresponding to each antenna port group. If the number of antennas corresponding to each antenna port group is small, the PMI information corresponding to each antenna port group can be used to indicate a code word from a predefined codebook, i.e. the PMI information is the index of the code word. For example, if the antenna port in the antenna port group has only 2 ports, the PMI information indicates the code word in the 2-antenna port codebook; if the antenna port in the antenna port group has only 4 ports, the PMI information indicates the code word in the 4-antenna port codebook. These codebooks can be agreed upon by the terminal and the network device in advance.

[0143] In some embodiments, other information in the first CSI or the second CSI, such as RI and CQI, can be calculated based on the PMI of the M antenna ports.

[0144] In some embodiments, the measurement and reporting of the CSI can be independent of the visible antenna port information. In some embodiments, the terminal device independently reports the CSI and the visible antenna port information to the network device.

[0145] In some embodiments, the first CSI contains first part information and second part information, the visible antenna port information is contained in the first part information, and at least part of the CSI corresponding to the visible antenna port information is contained in the second part information. The length of the second part information is determined according to the indication content of the first part information.

[0146] In some embodiments, after the terminal device determines the visible antenna port information and the first CSI based on the measurement reference signal, the terminal device reports the visible antenna port information and the first CSI to the network device, wherein the first CSI includes a CSI part 1 (i.e., a first part of information) and a CSI part 2 (i.e., a second part of information), the visible antenna port information is included in the CSI part 1, at least part of the CSI corresponding to the visible antenna port information is included in the CSI part 2, and the length of the CSI part 2 is determined according to the indication content of the CSI part 1.

[0147] In some embodiments, since the number or position of the visible antenna port can be used to determine the RI, PMI, CQI, etc. in the CSI, the visible antenna port information needs to be placed in the CSI part 1, and the CSI of variable length corresponding to the information can be placed in the CSI part 2. In some embodiments, when the visible antenna port information indicates different content, the length of the corresponding CSI can also be different.

[0148] In some embodiments, the first part of information includes the visible antenna port information, the RI, and at least part of the CQI, and the second part of information includes the PMI corresponding to the visible antenna port information.

[0149] In some embodiments, the CSI part 1 includes the visible antenna port information, the RI, and at least part of the CQI, and the CSI part 2 includes the PMI corresponding to the visible antenna port information.

[0150] The technical scheme provided by the embodiments of the present application is that the terminal device receives the measurement reference signal sent by the network device, sends the visible antenna port information and the first CSI determined based on the measurement reference signal to the network device, or sends the second CSI determined based on the measurement reference signal to the network device. That is, by reporting the CSI corresponding to the visible antenna port information to the network device by the terminal device, the network device can know the CSI of the antenna port visible to the terminal device, thereby facilitating avoiding the network device to make power waste on the non-visible antenna port to the terminal device, so as to improve the utilization rate of the antenna and the overall spectrum efficiency of the cell.

[0151] The above embodiments only introduce and describe the technical scheme provided by the present application from the perspective of the interaction between the terminal device and the network device. The steps performed by the terminal device described above can be implemented alone to become a CSI reporting method on the terminal device side. The steps performed by the network device described above can be implemented alone to become a CSI reporting method on the network device side.

[0152] The following is a device embodiment of the present application, which can be used to execute the method embodiments of the present application. For details not disclosed in the device embodiments of the present application, please refer to the method embodiments of the present application.

[0153] Please refer to Fig. 5, which shows a block diagram of a CSI reporting apparatus provided by an embodiment of the present application. The apparatus has the functions of implementing the above CSI reporting method, which can be implemented by hardware, or by executing corresponding software by hardware. The apparatus can be the terminal device introduced above, or can be arranged in the terminal device. As shown in Fig. 5, the apparatus 500 can include a receiving module 510 and a sending module 520.

[0154] The receiving module 510 is configured to receive a measurement reference signal sent by a network device.

[0155] The sending module 520 is configured to send, to the network device, visible antenna port information and first CSI determined based on the measurement reference signal, or send, to the network device, second CSI corresponding to the visible antenna port information configured by the network device, wherein the visible antenna port information is used to indicate visible antenna ports and / or non-visible antenna ports in antenna ports of the network device.

[0156] In some embodiments, the first CSI is CSI corresponding to the visible antenna port information determined by the terminal device.

[0157] In some embodiments, the antenna ports of the network device are antenna ports of the measurement reference signal, or the antenna ports of the measurement reference signal correspond to visible antenna ports in the antenna ports of the network device.

[0158] In some embodiments, the visible antenna port information includes at least one bit, and each bit is used to indicate whether an antenna port of the network device or an antenna port in a group of antenna ports is a visible antenna port or a non-visible antenna port.

[0159] In some embodiments, the visible antenna port information includes indication information of one or more groups of antenna ports, each group of antenna ports includes one or a plurality of continuous visible antenna ports, or each group of antenna ports includes one or a plurality of continuous non-visible antenna ports.

[0160] In some embodiments, the indication information of the group of antenna ports is used to indicate at least one of the following information: a starting antenna port of the group of antenna ports, a number of antenna ports included in the group of antenna ports.

[0161] In some embodiments, a number of the groups of antenna ports and / or a number of antenna ports included in each group of antenna ports are configured by the network device to the terminal device.

[0162] In some embodiments, the total number of the visual antenna ports indicated by the visual antenna port information is a value in a first agreed set; and / or, the total number of the non-visual antenna ports indicated by the visual antenna port information is a value in a second agreed set.

[0163] In some embodiments, the PMI of N antenna ports in the first CSI or the second CSI is zeroed in the part corresponding to the non-visual antenna ports, or the PMI is obtained based on first channel information, the part of the first channel information corresponding to the non-visual antenna ports is zeroed, and N is the total number of antenna ports of the network device.

[0164] In some embodiments, the first CSI or the second CSI only contains CSI corresponding to the visual antenna ports.

[0165] In some embodiments, the PMI of M antenna ports in the first CSI or the second CSI is determined based on at least one of the following information:

[0166] An agreed codebook of the M antenna ports;

[0167] The visual antenna port information;

[0168] An AI model for compressing the PMI.

[0169] In some embodiments, the visual antenna ports of the antenna ports of the network device include one or more antenna port groups, each of the antenna port groups includes a plurality of continuous visual antenna ports and different antenna port groups are discontinuous, and the PMI in the first CSI or the second CSI contains at least one of the following information:

[0170] Beam information corresponding to each of the antenna port groups respectively;

[0171] Frequency domain basis information corresponding to each of the antenna port groups respectively;

[0172] Weight coefficient information corresponding to each of the antenna port groups respectively;

[0173] Weight coefficient information between the plurality of antenna port groups;

[0174] Common frequency domain basis information of the plurality of antenna port groups;

[0175] Joint weight coefficient information of the plurality of antenna port groups;

[0176] PMI information corresponding to each of the antenna port groups respectively.

[0177] In some embodiments, the first CSI comprises a first part of information and a second part of information, the visual antenna port information is comprised in the first part of information, at least part of CSI corresponding to the visual antenna port information is comprised in the second part of information, and a length of the second part of information is determined according to an indication in the first part of information.

[0178] In some embodiments, the first part of information comprises the visual antenna port information, an RI, and at least part of a CQI, and the second part of information comprises a PMI corresponding to the visual antenna port information.

[0179] Please refer to FIG. 6, which shows a block diagram of a CSI reporting apparatus provided by another embodiment of the present application. The apparatus has the functions of implementing the above-mentioned CSI reporting method, which can be implemented by hardware or by hardware executing corresponding software. The apparatus can be the network device introduced above or can be arranged in the network device. As shown in FIG. 6, the apparatus 600 can comprise a sending module 610 and a receiving module 620.

[0180] The sending module 610 is configured to send a measurement reference signal to a terminal device.

[0181] The receiving module 620 is configured to receive visual antenna port information and a first CSI determined by the terminal device based on the measurement reference signal, or receive a second CSI determined by the terminal device based on the measurement reference signal, the second CSI being a CSI corresponding to visual antenna port information configured by the network device for the terminal device; wherein the visual antenna port information is used to indicate a visual antenna port and / or a non-visual antenna port in antenna ports of the network device.

[0182] In some embodiments, the first CSI is a CSI corresponding to the visual antenna port information determined by the terminal device.

[0183] In some embodiments, the antenna ports of the network device are antenna ports of the measurement reference signal, or the antenna ports of the measurement reference signal correspond to visual antenna ports in the antenna ports of the network device.

[0184] In some embodiments, the visual antenna port information comprises at least one bit, each of the bits being used to indicate whether an antenna port of the network device or an antenna port in a group of antenna ports is the visual antenna port or the non-visual antenna port.

[0185] In some embodiments, the visual antenna port information comprises indication information of one or more antenna port groups, each of the antenna port groups comprising one or more continuous visual antenna ports, or each of the antenna port groups comprising one or more continuous non-visual antenna ports.

[0186] In some embodiments, the indication information of the antenna port group is used to indicate at least one of the following information: a starting antenna port of the antenna port group, a number of antenna ports comprised in the antenna port group.

[0187] In some embodiments, the number of antenna port groups and / or the number of antenna ports comprised in each of the antenna port groups is configured by the network device to the terminal device.

[0188] In some embodiments, the total number of visual antenna ports indicated by the visual antenna port information is a value in a first agreed set; and / or, the total number of non-visual antenna ports indicated by the visual antenna port information is a value in a second agreed set.

[0189] In some embodiments, the PMI of N antenna ports comprised in the first CSI or the second CSI is zeroed in a part corresponding to the non-visual antenna ports, or the PMI is obtained based on first channel information which is zeroed in a part corresponding to the non-visual antenna ports, N being the total number of antenna ports of the network device.

[0190] In some embodiments, the first CSI or the second CSI only comprises CSI corresponding to the visual antenna ports.

[0191] In some embodiments, the PMI of M antenna ports comprised in the first CSI or the second CSI, M being the number of visual antenna ports, is determined based on at least one of the following information:

[0192] An agreed codebook of the M antenna ports;

[0193] The visual antenna port information;

[0194] An AI model used for compressing the PMI.

[0195] In some embodiments, the visual antenna ports of the antenna ports of the network device comprise one or more antenna port groups, each of the antenna port groups comprising continuous visual antenna ports and different antenna port groups being non-continuous, the PMI in the first CSI or the second CSI comprising at least one of the following information:

[0196] beam information corresponding to each of the antenna port groups respectively;

[0197] frequency domain basis information corresponding to each of the antenna port groups respectively;

[0198] weighting coefficient information corresponding to each of the antenna port groups respectively;

[0199] weighting coefficient information between the plurality of antenna port groups;

[0200] frequency domain basis information common to the plurality of antenna port groups;

[0201] weighting coefficient information common to the plurality of antenna port groups;

[0202] PMI information corresponding to each of the antenna port groups respectively.

[0203] In some embodiments, the first CSI contains first part information and second part information, the visible antenna port information is contained in the first part information, at least part of the CSI corresponding to the visible antenna port information is contained in the second part information, and the length of the second part information is determined according to the indicated content of the first part information.

[0204] In some embodiments, the first part information includes the visible antenna port information, RI, and at least part of CQI, and the second part information includes PMI corresponding to the visible antenna port information.

[0205] It should be noted that the apparatus provided by the above embodiments, when realizing its functions, is only exemplified by the above division of various functional modules, and in actual application, the above functions can be completed by different functional modules according to actual needs, that is, the content structure of the device is divided into different functional modules to complete all or part of the above described functions.

[0206] As to the apparatus in the above embodiments, the specific manners in which various modules perform operations have been described in detail in the embodiments of the method, and will not be described in detail here. For details not described in detail in the apparatus embodiments, reference can be made to the above method embodiments.

[0207] Please refer to FIG. 7, which shows a structural diagram of a communication device according to an embodiment of the present application. The communication device can be the terminal device or the network device described above. The communication device 700 can include a processor 701, a transceiver 702, and a memory 703. The processor 701 is configured to implement various processing functions of the communication device 700, such as generating information to be sent, processing information received, controlling transmission and / or reception, and so on. The transceiver 702 is configured to implement transmission and / or reception functions, such as the functions of the transmission module and / or the reception module described above.

[0208] The processor 701 includes one or more processing cores. The processor 701 performs various processing functions by running software programs and modules.

[0209] The transceiver 702 can include a receiver and a transmitter. For example, the receiver and the transmitter can be implemented as a same wireless communication component, which can include a wireless communication chip and a radio frequency antenna.

[0210] The memory 703 can be connected to the processor 701 and the transceiver 702.

[0211] The memory 703 can be configured to store computer programs for execution by the processor 701. The processor 701 is configured to execute the computer programs to implement various steps in the methods described above.

[0212] In some embodiments, the communication device 700 is a terminal device. The transceiver 702 is configured to receive a measurement reference signal sent by a network device, and send, to the network device, visible antenna port information and first CSI determined based on the measurement reference signal, or send, to the network device, second CSI determined based on the measurement reference signal, the second CSI being a CSI corresponding to visible antenna port information configured by the network device. The visible antenna port information is used to indicate visible antenna ports and / or non-visible antenna ports in antenna ports of the network device.

[0213] In some embodiments, the communication device 700 is a network device. The transceiver 702 is configured to send, to a terminal device, a measurement reference signal, and receive, from the terminal device, visible antenna port information and first CSI determined based on the measurement reference signal, or receive, from the terminal device, second CSI determined based on the measurement reference signal, the second CSI being a CSI corresponding to visible antenna port information configured by the network device. The visible antenna port information is used to indicate visible antenna ports and / or non-visible antenna ports in antenna ports of the network device.

[0214] For details not described in the present embodiment, refer to the above embodiments, which will not be repeated here.

[0215] In addition, the memory can be implemented by any type of volatile or nonvolatile storage devices 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 random access memory, read-only memory, magnetic storage, flash memory, programmable read-only memory.

[0216] The embodiments of the present application also provide a computer readable storage medium, wherein the storage medium stores a computer program, and the computer program is used by a processor to implement the CSI reporting method on the terminal device side or the CSI reporting method on the network device side. In some embodiments, the computer readable storage medium can include a ROM (Read-Only Memory), a RAM (Random-Access Memory), a SSD (Solid State Drives) or an optical disc, etc. The random access memory can include a ReRAM (Resistance Random Access Memory) and a DRAM (Dynamic Random Access Memory).

[0217] The embodiments of the present application also provide a chip, which includes a programmable logic circuit and / or program instructions, and when the chip is running, is used to implement the CSI reporting method on the terminal device side or the CSI reporting method on the network device side.

[0218] The embodiments of the present application also provide a computer program product, which includes computer instructions stored in a computer readable storage medium, and a processor reads and executes the computer instructions from the computer readable storage medium to implement the CSI reporting method on the terminal device side or the CSI reporting method on the network device side.

[0219] It should be understood that the "indication" mentioned in the embodiments of the present application can be direct indication, indirect indication, or can be an indication with an associated relationship. For example, A indicates B, which can mean that B can be obtained by A; or A indirectly indicates B, for example, A indicates C, and B can be obtained by C; or A and B have an associated relationship.

[0220] In the description of the embodiments of the present application, the term "corresponding" can mean that there is a direct or indirect corresponding relationship between the two, or can mean that there is an associated relationship between the two, or can mean an indication and being indicated, configuration and being configured, etc.

[0221] In some embodiments of the present application, "predefined" can be realized by pre-storing corresponding codes, tables or other means for indicating relevant information in devices (e.g., including terminal devices and network devices), and the present application does not limit the specific implementation manner thereof. For example, predefined can refer to that defined in a protocol.

[0222] In some embodiments of the present application, the "protocol" can refer to a standard protocol in the communication field, which can include BLE protocol, Wi-Fi protocol and relevant protocols applied in future communication systems, and the present application does not limit this.

[0223] "Multiple" mentioned herein refers to two or more than two. "And / or" describes the association relationship of associated objects, which means that there can be three relationships, for example, A and / or B can mean that there are three cases of A alone, A and B together, and B alone. The character " / " generally represents that the associated objects before and after it are in an "or" relationship.

[0224] "Greater than or equal to" mentioned herein can mean greater than or equal to, and "less than or equal to" can mean less than or equal to.

[0225] In addition, the step numbers described herein only exemplarily show a possible execution order between steps, and in some other embodiments, the above steps can also be executed in a sequence different from the number, such as simultaneously executing two steps with different numbers or executing two steps with different numbers in an order opposite to the illustration, and the embodiments of the present application do not limit this.

[0226] Those skilled in the art should realize that in one or more of the above examples, the functions described in the embodiments of the present application can be realized by hardware, software, firmware or any combination thereof. When realized by software, these functions can be stored in a computer readable medium or transmitted as one or more instructions or codes on a computer readable medium. The computer readable medium includes computer storage medium and communication medium, wherein the communication medium includes any medium facilitating the transmission of computer programs from one place to another. The storage medium can be any available medium accessible by a general or special purpose computer.

[0227] The above only describes exemplary embodiments of the present application and does not limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method for reporting channel state information (CSI), characterized in that, The method is performed by a terminal device, and the method comprises: receiving a measurement reference signal sent by a network device; sending, to the network device, visible antenna port information determined based on the measurement reference signal and first CSI, or sending, to the network device, second CSI determined based on the measurement reference signal, the second CSI being CSI corresponding to visible antenna port information configured by the network device for the terminal device; wherein the visible antenna port information is used to indicate visible antenna ports and / or non-visible antenna ports in antenna ports of the network device.

2. The method of claim 1, wherein, The first CSI is CSI corresponding to the visible antenna port information determined by the terminal device.

3. The method according to claim 1 or 2, characterized in that, The antenna ports of the network device are antenna ports of the measurement reference signal, or the antenna ports of the measurement reference signal correspond to visible antenna ports in the antenna ports of the network device.

4. The method according to any one of claims 1 to 3, characterized in that, The visible antenna port information comprises at least one bit, and each bit is used to indicate whether an antenna port in one antenna port or one antenna port group of the network device is the visible antenna port or the non-visible antenna port.

5. The method according to any one of claims 1 to 3, characterized in that, The visible antenna port information comprises indication information of one or more antenna port groups, each antenna port group containing one or a plurality of continuous visible antenna ports, or each antenna port group containing one or a plurality of continuous non-visible antenna ports.

6. The method of claim 5, wherein, The indication information of the antenna port group is used to indicate at least one of the following information: a starting antenna port of the antenna port group, and a number of antenna ports contained in the antenna port group.

7. The method according to any one of claims 4 to 6, characterized in that, The number of the antenna port groups and / or the number of antenna ports contained in each antenna port group are configured by the network device to the terminal device.

8. The method of any one of claims 1 to 7, wherein: a total number of the visible antenna ports indicated by the visible antenna port information is a value in a first agreed set; and / or a total number of the non-visible antenna ports indicated by the visible antenna port information is a value in a second agreed set. A precoding matrix indicator (PMI) in the first CSI or the second CSI contains N antenna ports, wherein a part of the PMI corresponding to the non-visible antenna ports is zeroed, or the PMI is obtained based on first channel information, a part of the first channel information corresponding to the non-visible antenna ports is zeroed, and N is a total number of antenna ports of the network device.

9. The method according to any one of claims 1 to 8, characterized in that, The first CSI or the second CSI only contains CSI corresponding to the visible antenna ports.

10. The method according to any one of claims 1 to 8, characterized in that, The PMI in the first CSI or the second CSI contains M antenna ports, M being a number of the visible antenna ports; wherein the PMI of the M antenna ports is determined based on at least one of the following information:

11. The method of claim 10, wherein, an agreed codebook of the M antenna ports; the visible antenna port information; an artificial intelligence (AI) model used to compress the PMI. ​ 12. The method according to any one of claims 9 to 11, characterized in that, The visible antenna ports in the antenna ports of the network device include one or more antenna port groups, each of the antenna port groups includes a plurality of the visible antenna ports in succession and the antenna port groups are discontinuous, and the PMI in the first CSI or the second CSI includes at least one of the following information: beam information corresponding to each of the antenna port groups respectively; frequency domain basis information corresponding to each of the antenna port groups respectively; weighting coefficient information corresponding to each of the antenna port groups respectively; weighting coefficient information between the plurality of antenna port groups; frequency domain basis information common to the plurality of antenna port groups; weighting coefficient information jointly of the plurality of antenna port groups; PMI information corresponding to each of the antenna port groups respectively.

13. The method according to any one of claims 1 to 12, characterized in that, The first CSI includes first part information and second part information, the visible antenna port information is included in the first part information, and at least part of the CSI corresponding to the visible antenna port information is included in the second part information, and the length of the second part information is determined according to the indicated content of the first part information.

14. The method of claim 13, wherein, The first part information includes the visible antenna port information, rank indication (RI) and at least part of channel quality indication (CQI), and the second part information includes PMI corresponding to the visible antenna port information.

15. A channel state information (CSI) reporting method, comprising: The method is performed by a network device, and the method includes: sending a measurement reference signal to a terminal device; receiving visible antenna port information and first CSI determined by the terminal device based on the measurement reference signal, or receiving second CSI determined by the terminal device based on the measurement reference signal, the second CSI being CSI corresponding to the visible antenna port information configured by the network device. The visible antenna port information is used to indicate visible antenna ports and / or non-visible antenna ports in the antenna ports of the network device.

16. The method of claim 15, wherein, The first CSI is CSI corresponding to the visible antenna port information determined by the terminal device.

17. The method according to claim 15 or 16, characterized in that, The antenna ports of the measurement reference signal are the antenna ports of the network device, or the antenna ports of the measurement reference signal correspond to the visible antenna ports in the antenna ports of the network device.

18. The method according to any one of claims 15 to 17, characterized in that, The visible antenna port information includes at least one bit, and each of the bits is used to indicate whether an antenna port or an antenna port in an antenna port group of the network device is the visible antenna port or the non-visible antenna port.

19. The method according to any one of claims 15 to 17, characterized in that, The visible antenna port information includes indication information of one or more antenna port groups, each of the antenna port groups includes one or a plurality of the visible antenna ports in succession, or each of the antenna port groups includes one or a plurality of the non-visible antenna ports in succession.

20. The method of claim 19, wherein, The indication information of the antenna port group is used to indicate at least one of the following information: a starting antenna port of the antenna port group, and a number of antenna ports included in the antenna port group.

21. The method according to any one of claims 18 to 20, characterized in that, The number of the antenna port groups and / or the number of antenna ports included in each of the antenna port groups is configured by the network device to the terminal device.

22. The method of any of claims 15-21, wherein: the total number of the visual antenna ports indicated by the visual antenna port information is a value in a first agreed set; and / or, the total number of the non-visual antenna ports indicated by the visual antenna port information is a value in a second agreed set. The precoding matrix indicator (PMI) in the first CSI or the second CSI contains N antenna ports, wherein a part of the PMI corresponding to the non-visual antenna ports is zeroed, or the PMI is obtained based on first channel information, wherein a part of the first channel information corresponding to the non-visual antenna ports is zeroed, and N is the total number of antenna ports of the network device. The first CSI or the second CSI contains only CSI corresponding to the visual antenna ports. The PMI in the first CSI or the second CSI contains M antenna ports, and M is the number of the visual antenna ports; wherein the PMI of the M antenna ports is determined based on at least one of the following information:

23. The method according to any one of claims 15 to 22, characterized in that, An agreed codebook of the M antenna ports; 24. The method according to any one of claims 15 to 22, characterized in that, The visual antenna port information; 25. The method of claim 24, wherein, An artificial intelligence (AI) model for compressing the PMI. The visual antenna ports of the antenna ports of the network device contain one or more antenna port groups, each of the antenna port groups contains a plurality of continuous visual antenna ports and different antenna port groups are non-continuous, and the PMI in the first CSI or the second CSI contains at least one of the following information: Beam information corresponding to each of the antenna port groups, respectively; Frequency domain basis information corresponding to each of the antenna port groups, respectively; 26. The method according to any one of claims 23 to 25, characterized in that, Weighting coefficient information corresponding to each of the antenna port groups, respectively; Weighting coefficient information between the plurality of antenna port groups; Frequency domain basis information common to the plurality of antenna port groups; Joint weighting coefficient information of the plurality of antenna port groups; PMI information corresponding to each of the antenna port groups, respectively. The first CSI contains first part information and second part information, the visual antenna port information is contained in the first part information, and at least part of the CSI corresponding to the visual antenna port information is contained in the second part information, and the length of the second part information is determined according to the indicated content of the first part information. The first part information includes the visual antenna port information, a rank indication (RI), and at least part of a channel quality indication (CQI), and the second part information includes PMI corresponding to the visual antenna port information. The apparatus includes:

27. The method according to any one of claims 15 to 26, characterized in that, A receiving module configured to receive a measurement reference signal sent by a network device; 28. The method of claim 27, wherein, A sending module configured to send, to the network device, visual antenna port information and first CSI determined based on the measurement reference signal, or to send, to the network device, second CSI corresponding to the visual antenna port information configured by the network device; 29. A channel state information (CSI) reporting apparatus, comprising: The visual antenna port information is used to indicate visual antenna ports and / or non-visual antenna ports among antenna ports of the network device. ​ ​ ​ 30. A channel state information (CSI) reporting apparatus, comprising: The apparatus comprises: a sending module configured to send a measurement reference signal to a terminal device; a receiving module configured to receive visible antenna port information and first CSI determined by the terminal device based on the measurement reference signal, or receive second CSI determined by the terminal device based on the measurement reference signal, the second CSI being CSI corresponding to the visible antenna port information configured by the network device; wherein the visible antenna port information is used to indicate visible antenna ports and / or non-visible antenna ports in antenna ports of the network device.

31. A terminal device, comprising: The terminal device comprises a processor and a memory, the memory storing a computer program, and the processor executes the computer program to implement the method according to any one of claims 1 to 14.

32. A network device, comprising: The network device comprises a processor and a memory, the memory storing a computer program, and the processor executes the computer program to implement the method according to any one of claims 15 to 28.

33. A computer-readable storage medium, characterized in that, The storage medium stores a computer program, and the computer program is configured to be executed by a processor to implement the method according to any one of claims 1 to 14, or implement the method according to any one of claims 15 to 28.

34. A chip, characterized by The chip comprises programmable logic circuitry and / or program instructions, and when the chip is running, is configured to implement the method according to any one of claims 1 to 14, or implement the method according to any one of claims 15 to 28.

35. A computer program product, characterised in that, The computer program product comprises computer instructions stored in a computer readable storage medium, and a processor reads and executes the computer instructions from the computer readable storage medium to implement the method according to any one of claims 1 to 14, or implement the method according to any one of claims 15 to 28.

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