Spatial domain sending filter matching method and apparatus, and device and storage medium

Abstract

A spatial domain sending filter matching method and apparatus, and a device and a storage medium, which relate to communication technology. The method comprises: a terminal device receiving a plurality of reference signals sent by means of an intelligent reflecting surface, wherein the plurality of reference signals are sent by using respective corresponding downlink spatial domain sending filters (510); and the terminal device sending first information, wherein the first information is used for indicating a first reference signal among the plurality of reference signals (520). The method can realize spatial domain sending filter matching in a communication scenario including an intelligent reflecting surface, thereby improving the network performance and the communication quality.

Description

Spatial domain transmit filter matching method, device, equipment and storage medium Technical Field

[0001] The embodiments of the present application relate to the field of communication technology, and in particular to a spatial domain transmit filter matching method, apparatus, device, and storage medium. Background Art

[0002] After the terminal device enters the connected state, the reference signal can be used to match the terminal spatial domain transmit filter used for data transmission with the network device spatial domain transmit filter.

[0003] Smart reflective surfaces can intelligently reconfigure the wireless propagation environment, thereby improving the performance of wireless communication networks. However, current wireless communication networks do not support spatial domain transmit filter matching between terminal devices and smart reflective surfaces when using smart reflective surfaces.

[0004] Summary of the Invention

[0005] The present invention provides a method, apparatus, device, and storage medium for matching spatial domain transmit filters. The technical solution is as follows:

[0006] According to one aspect of an embodiment of the present application, a spatial domain transmit filter matching method is provided, the method being performed by a terminal device, the method comprising:

[0007] receiving a plurality of reference signals sent by the smart reflecting surface, wherein the plurality of reference signals are sent using respective corresponding downlink spatial domain transmit filters;

[0008] First information is sent, where the first information is used to indicate a first reference signal among the multiple reference signals.

[0009] According to one aspect of an embodiment of the present application, a spatial domain transmit filter matching method is provided, the method being performed by a smart reflective surface, the method comprising:

[0010] Sending multiple reference signals to a terminal device, where the multiple reference signals are sent using respective corresponding downlink spatial domain transmit filters;

[0011] A first downlink spatial domain transmit filter adapted to the terminal device is determined according to a first reference signal fed back by the terminal device, where the first downlink spatial domain transmit filter is a downlink spatial domain transmit filter corresponding to the first reference signal.

[0012] According to one aspect of an embodiment of the present application, a spatial domain transmit filter matching method is provided, the method being performed by a network device, the method comprising:

[0013] Third indication information is sent, where the third indication information is used to instruct the smart reflecting surface to send multiple reference signals, where the multiple reference signals are sent using respectively corresponding downlink spatial domain transmit filters.

[0014] According to one aspect of an embodiment of the present application, a spatial domain transmit filter matching device is provided, the device being disposed in a terminal device, the device comprising:

[0015] a transceiver module, configured to receive multiple reference signals sent by the smart reflector, wherein the multiple reference signals are sent using respective corresponding downlink spatial domain transmit filters;

[0016] The transceiver module is further configured to send first information, where the first information is used to indicate a first reference signal among the multiple reference signals.

[0017] According to one aspect of an embodiment of the present application, a spatial domain transmit filter matching device is provided, wherein the device is disposed in a smart reflective surface and includes:

[0018] A transceiver module, configured to send multiple reference signals to a terminal device, wherein the multiple reference signals are sent using respective corresponding downlink spatial domain transmit filters;

[0019] The transceiver module is further used to determine a first downlink spatial domain transmit filter adapted to the terminal device based on the first reference signal fed back by the terminal device, where the first downlink spatial domain transmit filter is a downlink spatial domain transmit filter corresponding to the first reference signal.

[0020] According to one aspect of an embodiment of the present application, a spatial domain transmit filter matching device is provided, the device being arranged in a network device, the device comprising:

[0021] The transceiver module is configured to send third indication information, where the third indication information is used to instruct the smart reflecting surface to send multiple reference signals, where the multiple reference signals are sent using their respective corresponding downlink spatial domain transmit filters.

[0022] According to one aspect of an embodiment of the present application, a communication device is provided, comprising a processor and a memory, wherein the memory stores a computer program, and the processor executes the computer program to implement the above-described spatial domain transmit filter matching method. In some embodiments, the communication device is a terminal device, a smart reflective surface, or a network device.

[0023] According to one aspect of an embodiment of the present application, a computer-readable storage medium is provided, in which a computer program is stored. The computer program is used to be executed by a processor to implement the above-mentioned spatial domain transmit filter matching method.

[0024] According to one aspect of an embodiment of the present application, a chip is provided, which includes a programmable logic circuit and / or program instructions. When the chip is running, it is used to implement the above-mentioned spatial domain transmit filter matching method.

[0025] According to one aspect of an embodiment of the present application, a computer program product is provided, which includes a computer program stored in a computer-readable storage medium, and a processor reads and executes the computer program from the computer-readable storage medium to implement the above-mentioned spatial domain transmit filter matching method.

[0026] The technical solutions provided by the embodiments of the present application may have the following beneficial effects:

[0027] After a terminal device receives multiple reference signals transmitted by the smart reflecting surface using a spatial domain transmit filter, it reports the first reference signal from the multiple reference signals. Because the multiple reference signals are transmitted by the smart reflecting surface using their corresponding downlink spatial domain transmit filters, there is a correspondence between the downlink spatial domain transmit filters of the smart reflecting surface and the reference signals. By reporting the first reference signal, the smart reflecting surface can determine the appropriate downlink spatial domain transmit filter for the terminal device, enabling spatial domain transmit filter matching in communication scenarios involving the smart reflecting surface, thereby improving network performance and communication quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] FIG1 is a schematic diagram of a network architecture provided by an embodiment of the present application;

[0029] FIG2 is a schematic diagram of a smart reflective surface forwarding message provided by an embodiment of the present application;

[0030] FIG3 is a schematic diagram of selecting an optimal downlink spatial domain transmit filter according to an embodiment of the present application;

[0031] FIG4 is a schematic diagram of matching an uplink spatial domain transmit filter with a downlink spatial domain transmit filter according to an embodiment of the present application;

[0032] FIG5 is a flowchart of a spatial domain transmit filter matching method on a terminal device side provided by one embodiment of the present application;

[0033] FIG6 is a flow chart of a method for matching a spatial domain transmit filter on a smart reflective surface side provided by one embodiment of the present application;

[0034] FIG7 is a flowchart of a spatial domain transmit filter matching method on a network device side provided by one embodiment of the present application;

[0035] FIG8 is a schematic diagram of a network device sending a message to a smart reflective surface according to an embodiment of the present application;

[0036] FIG9 is a block diagram of a spatial domain transmit filter matching device provided by one embodiment of the present application;

[0037] FIG10 is a block diagram of a spatial domain transmit filter matching device provided by another embodiment of the present application;

[0038] FIG11 is a block diagram of a spatial domain transmit filter matching device provided by another embodiment of the present application;

[0039] FIG12 is a schematic structural diagram of a communication device provided in one embodiment of the present application. DETAILED DESCRIPTION

[0040] In order to make the objectives, technical solutions and advantages of this application clearer, the implementation methods of this application will be further described in detail below with reference to the accompanying drawings.

[0041] The network architecture and business scenarios described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided by the embodiments of the present application. A person skilled in the art will appreciate that, with the evolution of the network architecture and the emergence of new business scenarios, the technical solutions provided by the embodiments of the present application are equally applicable to similar technical problems.

[0042] Please refer to FIG1 , which shows a schematic diagram of a network architecture 100 provided by an embodiment of the present application. The network architecture 100 may include: a terminal device 10 , an access network device 20 , and a core network element 30 .

[0043] The terminal device 10 may refer to a UE (User Equipment), an access terminal, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a wireless communication device, a user agent, or a user apparatus. In some embodiments, the terminal device 10 may 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 capabilities, a computing device or other processing device connected to a wireless modem, a vehicle-mounted 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 ease of description, the above-mentioned devices are collectively referred to as terminal devices. The number of terminal devices 10 is generally multiple, and one or more terminal devices 10 may be distributed in a cell managed by each access network device 20. The terminal device may also be referred to as a terminal or UE for short, and those skilled in the art will understand its meaning.

[0044] Access network equipment 20 is a device deployed in an access network to provide wireless communication capabilities for terminal devices 10. Access network equipment 20 may include various forms of macro base stations, micro base stations, relay stations, access points, and the like. In systems employing different wireless access technologies, the names of devices that provide access network equipment functions may vary. For example, in 5G NR systems, they are referred to as gNodeBs or gNBs. As communication technologies evolve, the term "access network equipment" may change. For ease of description, in the embodiments of this application, the aforementioned devices that provide wireless communication capabilities for terminal devices 10 are collectively referred to as access network equipment. In some embodiments, access network equipment 20 enables communication between terminal devices 10 and core network elements 30. For example, in an LTE (Long Term Evolution) system, access network equipment 20 may be an Evolved Universal Terrestrial Radio Access Network (EUTRAN) or one or more eNodeBs within the EUTRAN. In a 5G NR system, access network equipment 20 may be a Radio Access Network (RAN) or one or more gNBs within the RAN. In the embodiment of the present application, unless otherwise specified, the "network device" refers to the access network device 20, such as a base station.

[0045] The core network element 30 is a network element deployed in the core network. The functions of the core network element 30 are mainly to provide user connection, user management, and service bearer, and to provide an interface to the external network as a bearer network. For example, the core network elements in the 5G NR system may include network elements such as the AMF (Access and Mobility Management Function) entity, the UPF (User Plane Function) entity, and the SMF (Session Management Function) entity.

[0046] In some embodiments, the access network device 20 and the core network element 30 communicate with each other via an 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 via an air interface technology, such as the Uu interface.

[0047] The "5G NR system" in the embodiments of the present application may also be referred to as a 5G system or an NR system, but those skilled in the art will understand its meaning. The technical solutions described in the embodiments of the present application may be applicable to LTE systems, 5G NR systems, and subsequent evolution systems of 5G NR systems (e.g., B5G (Beyond 5G) systems, 6G systems (6th Generation System, sixth generation mobile communication systems)), and other communication systems such as NB-IoT (Narrow Band Internet of Things) systems, which are not limited in this application.

[0048] In an embodiment of the present application, the network device can provide services for a cell, and the terminal device communicates with the network device through the transmission resources (for example, frequency domain resources, or spectrum resources) on the carrier used by the cell. The cell can be a cell corresponding to the network device (for example, a base station). The cell can belong to a macro base station or a base station corresponding to a small cell. The small cells here may include: metro cell, micro cell, pico cell, femto cell, etc. These small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission services.

[0049] Before introducing the technical solutions of this application, we first introduce and explain some of the relevant technical knowledge involved in this application. The following related technologies can be combined with the technical solutions of the embodiments of this application as optional solutions, and they all fall within the scope of protection of the embodiments of this application. The embodiments of this application include at least part of the following contents.

[0050] 1. Intelligent reflective surface

[0051] IRS (Intelligent Reflecting Surface) is a revolutionary new technology that can significantly improve the performance of wireless communication networks by integrating a large number of low-cost passive reflective elements on a plane, intelligently reconfiguring the wireless propagation environment. Specifically, the different elements of the IRS can independently reflect the incident signal by controlling their amplitude and / or phase, thereby collaboratively achieving sophisticated three-dimensional (3D) passive beamforming for directional signal enhancement or nulling. In one case, the IRS reflects the incident signal, meaning that the IRS transparently forwards the incident signal without processing the incident signal. In another case, the IRS reflects the incident signal, meaning that the IRS processes the incident signal and forwards it. The IRS's processing of the incident signal can include reading, parsing, and writing the incident signal. In addition, the IRS can adjust the direction of the reflected signal by controlling the amplitude and / or phase of different elements to achieve the purpose of reflecting the signal in different directions, which is not limited to mirror reflection. The IRS can also forward the incident signal in the form of a beam. Even if the incident signal is not sent to the IRS in the form of a beam, the IRS can still forward the incident signal in the form of a beam.

[0052] In stark contrast to existing transmitter / receiver wireless link adaptation techniques, IRS actively modifies the wireless channel between them through highly controllable and intelligent signal reflection. This provides new degrees of freedom to further improve the performance of wireless links and paves the way for the realization of intelligent programmable wireless environments. By properly adjusting the 3D passive beamforming, the signal reflected by the IRS can be constructively added with the signal from other paths to enhance the desired signal power at the receiver, or destructively cancel unwanted signals such as co-channel interference. Because the IRS eliminates the use of the transmit RF (Radio Frequency) chain and operates only over a short distance, it can be densely deployed with scalable cost and low energy consumption without the need for complex interference management between passive IRSs.

[0053] As shown in Figure 2, when there is no IRS, the beam h transmitted by the transmitter is d Directly received by the receiving end; in the presence of IRS, the beam h emitted by the transmitting end A,n Reflected by IRS as h B,n , the receiver receives h reflected by IRS B,nIn some scenarios, such as building scenarios, where the transmitter is located on the rooftop and the receiver is located on a lower floor of the building, without an IRS, signals sent directly from the transmitter to the receiver are easily affected by obstacles such as walls, resulting in poor signal quality at the receiver. However, if an IRS is installed on the wall of an adjacent building and forwards the signal transmitted by the transmitter, the number of obstacles in the signal propagation path can be effectively reduced, resulting in higher signal quality at the receiver. The IRS replaces the transmit RF chain. Since IRSs only operate over short distances, dense deployment can be used to improve the transmitter's signal coverage. If the distance between the transmitter and receiver is long, multiple IRSs can forward the beam transmitted by the transmitter, eliminating the need for the transmitter to perform complex interference management on the IRSs. However, in long distances, the transmitter needs to manage the beam transmitted by the transmit RF chain, such as determining the transmit power of the beam, to ensure the signal quality of the beam received by the receiver.

[0054] 2. Beam matching

[0055] Beam matching is the process of selecting a pair of optimal beams for communication between different communication devices.

[0056] The following is an exemplary description of beam matching between a network device and a terminal device:

[0057] First, as shown in Figure 3, the network device 15 sends CSI-RS (Channel State Information-Reference Signal) in different directions at different time domain positions (symbol 1, symbol 2, symbol 3, symbol 4). Among them, the symbol can be an OFDM (Orthogonal Frequency Division Multiplexing) symbol. After receiving the corresponding CSI-RS measurement configuration, the terminal device 13 can perform measurements on the CSI-RS in different directions, and report the beam corresponding to the CSI-RS with the best received signal quality to the network device 15, so that the network device 15 can know what the CSI-RS with the best signal and the corresponding beamforming space transmission parameters are for the terminal device 13.

[0058] To further perform uplink beam matching, after completing the downlink beam matching process, as shown in Figure 4, network device 15 can reconfigure a set of CSI-RSs for terminal device 13 that are oriented in the same direction as the reported CSI-RS. Furthermore, when performing measurements, terminal device 13 can change its own receiving beam to select an appropriate uplink beam.

[0059] The network architecture and business scenarios described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided by the embodiments of the present application. A person skilled in the art will appreciate that, with the evolution of the network architecture and the emergence of new business scenarios, the technical solutions provided by the embodiments of the present application are equally applicable to similar technical problems.

[0060] Please refer to Figure 5, which shows a flow chart of a spatial domain transmit filter matching method provided by an embodiment of the present application. The execution subject of each step of the method is a terminal device. The method may include at least one step of steps 510-520.

[0061] In step 510, the terminal device receives multiple reference signals sent by the smart reflecting surface. The multiple reference signals are sent using their respective corresponding downlink spatial domain transmission filters.

[0062] It should be noted that in this application, the "spatial domain transmission filter" mentioned is also called a "beam", and the two express the same meaning. In some embodiments, it can also be called a "spatial domain transmission filter", "spatial domain transmission filter", "spatial domain transmission filter" or other names, and those skilled in the art can understand its meaning. In addition, unless otherwise specified, the above-mentioned "spatial domain transmission filter" refers to a "transmission beam", and can also be called a "transmitting end spatial domain filter", "spatial domain transmission filter for transmission", "spatial domain transmission filter used for transmission" or other names, and this application does not limit this. Correspondingly, the "spatial domain receive filter" is also called a "receiving beam", and can also be called a "spatial domain receive filter", "receiving end spatial domain filter", "spatial domain transmission filter for reception", "spatial domain transmission filter used for reception" or other names, and this application does not limit this.

[0063] In some embodiments, the smart reflective surface sends multiple reference signals to the terminal device, and the terminal device receives the multiple reference signals sent by the smart reflective surface.

[0064] In some embodiments, the reference signal refers to a CSI-RS, and different CSI-RSs are sent using downlink spatial domain transmission filters.

[0065] In some embodiments, a terminal device receives first indication information, the first indication information being used to instruct the smart reflecting surface to transmit multiple reference signals. In some embodiments, the terminal device receives first indication information, the first indication information being used to instruct the smart reflecting surface to transmit multiple reference signals in a non-repeating manner. The non-repeating manner means that multiple reference signals are not transmitted repeatedly in a certain direction. The smart reflecting surface utilizes a downlink spatial domain transmit filter to transmit the multiple reference signals separately. For example, the smart reflecting surface utilizes a downlink spatial domain transmit filter to transmit the multiple reference signals separately at different time domain locations.

[0066] In some embodiments, the network device sends first indication information to the terminal device.

[0067] In some embodiments, the first indication information may include multiple time-frequency domain positions corresponding to multiple reference signals. Therefore, the terminal device can measure the multiple reference signals according to the first indication information.

[0068] In some embodiments, the reference signal is NZP CSI-RS (Non-Zero Power Channel State Information-Reference Signal), and accordingly, the first indication information may be NZP CSI-RS-ResourceSet (Non-Zero Power Channel State Information-Reference Signal-ResourceSet).

[0069] Step 520: The terminal device sends first information, where the first information is used to indicate a first reference signal among multiple reference signals.

[0070] In some embodiments, the first reference signal is a reference signal with the best received signal quality measured by the terminal device among multiple reference signals.

[0071] This application does not limit the method for the terminal device to measure the downlink signal, and the indicators used by the terminal device to measure the signal quality of the downlink spatial domain transmit filter. For example, the terminal device can use SNR (Signal to Noise Ratio), SINR (Signal to Interference plus Noise Ratio), RSRQ (Reference Signal Receiving Quality), signal energy, RSRP (Reference Signal Receiving Power), RSSI (Received Signal Strength Indicator), etc. as indicators to measure the signal quality of the downlink spatial domain transmit filter.

[0072] In some embodiments, the multiple reference signals have different identification information. The identification information is used to distinguish the multiple reference signals. Exemplarily, different CSI-RSs have different CSI-RS IDs.

[0073] In some embodiments, the first information includes identification information of the first reference signal. Exemplarily, if the first reference signal is a CSI-RS, the first information includes ID information of the CSI-RS.

[0074] In some embodiments, the terminal device sends the first information to the network device, or the terminal device sends the first information to the smart reflective surface.

[0075] In some embodiments, the terminal device sends the first information to the network device, and the network device then sends the first information to the smart reflective surface.

[0076] In some embodiments, a terminal device receives second indication information, the second indication information being used to instruct the smart reflecting surface to transmit a first reference signal spatial domain transmit filter. In some embodiments, the terminal device receives second indication information, the second indication information being used to instruct the smart reflecting surface to transmit the first reference signal in a repeated manner. The repeated manner means that a reference signal is transmitted repeatedly. The smart reflecting surface uses the first downlink spatial domain transmit filter to repeatedly transmit the first reference signal. For example, the smart reflecting surface uses the first downlink spatial domain transmit filter to repeatedly transmit the first reference signal at different time domain locations.

[0077] In some embodiments, the network device sends second indication information to the terminal device.

[0078] In some embodiments, the second indication information may include the time-frequency domain position corresponding to the first reference signal. Therefore, the terminal device may match the downlink spatial domain transmit filter corresponding to the first reference signal according to the second indication information.

[0079] In some embodiments, a terminal device receives a first reference signal transmitted by a smart reflecting surface using a first downlink spatial domain transmit filter, and determines a first uplink spatial domain transmit filter that matches the first downlink spatial domain transmit filter. The first downlink spatial domain transmit filter is a downlink spatial domain transmit filter corresponding to the first reference signal.

[0080] In some embodiments, the terminal device may select the first uplink spatial domain transmit filter by transforming the spatial domain receive filter applied by the terminal device.

[0081] In some embodiments, if the terminal device uses a certain spatial domain receive filter to receive the first reference signal and the received signal quality is the best, the spatial domain receive filter is selected as the first uplink spatial domain transmit filter.

[0082] In some embodiments, the correspondence between the downlink spatial domain transmit filter and the reference signal is determined by the network device and indicated to the smart reflecting surface.

[0083] In some embodiments, the correspondence between the downlink spatial domain transmit filter and the reference signal is determined by a smart reflecting surface.

[0084] In some embodiments, the number of downlink spatial domain transmit filters and / or the number of multiple reference signals is configured by a network device, or configured by a smart reflective surface, or is pre-configured.

[0085] The technical solution provided by the embodiments of the present application reports the first reference signal among the multiple reference signals after the terminal device receives multiple reference signals transmitted by the smart reflecting surface using different spatial domain transmit filters. Because the multiple reference signals are transmitted by the smart reflecting surface using different downlink spatial domain transmit filters, there is a correspondence between the downlink spatial domain transmit filter of the smart reflecting surface and the reference signals. By reporting the first reference signal, the smart reflecting surface can be informed of the downlink spatial domain transmit filter that is suitable for the terminal device, achieving spatial domain transmit filter matching in communication scenarios involving the smart reflecting surface, thereby improving network performance and communication quality.

[0086] Please refer to Figure 6, which shows a flow chart of a spatial domain transmit filter matching method provided by one embodiment of the present application. The execution subject of each step of the method is a smart reflective surface. The method may include at least one step of steps 610-620.

[0087] Step 610: The intelligent reflection plane sends multiple reference signals to the terminal device. The multiple reference signals are sent using their respective corresponding downlink spatial domain transmission filters.

[0088] In some embodiments, the smart reflecting surface uses different downlink spatial domain transmit filters to send multiple reference signals to the terminal device.

[0089] In some embodiments, the smart reflecting surface uses different downlink spatial domain transmit filters to send different CSI-RSs to the terminal device.

[0090] In some embodiments, the smart reflecting surface sends CSI-RS with different IDs and directions to the terminal device at different time domain positions.

[0091] In some embodiments, a network device sends a reference signal to a smart reflecting surface, which then processes the received reference signal to generate multiple reference signals. For example, the network device sends a CSI-RS to the smart reflecting surface, which then reflects the signal in different directions to generate multiple different CSI-RS signals.

[0092] In some embodiments, the smart reflecting surface receives third indication information, where the third indication information is used to instruct the smart reflecting surface to use respectively corresponding downlink spatial domain transmit filters to transmit multiple reference signals.

[0093] In some embodiments, the third indication information is used to instruct the smart reflecting surface to send multiple reference signals in the form of non-repeating spatial domain transmit filters.

[0094] The third indication information may be the same as or different from the first indication information in the above embodiment, and this application does not limit this.

[0095] In some embodiments, the network device sends third indication information to the smart reflecting surface.

[0096] In some embodiments, the smart reflecting surface uses different downlink spatial domain transmit filters to send multiple reference signals to the terminal device according to the third indication information.

[0097] In some embodiments, the third indication information may include time-frequency domain positions corresponding to multiple reference signals.

[0098] In some embodiments, the smart reflecting surface uses different downlink spatial domain transmit filters at different time domain positions to send multiple reference signals to the terminal device according to the third indication information.

[0099] In some embodiments, after the smart reflecting surface is able to determine the correspondence between the downlink spatial domain transmit filter and the reference signal, it does not need to receive the third indication information and independently uses the corresponding downlink spatial domain transmit filter to send multiple reference signals to the terminal device.

[0100] In some embodiments, the correspondence between the downlink spatial domain transmit filter and the reference signal is determined by a network device. Before the smart reflecting surface transmits multiple reference signals to the terminal device using the downlink spatial domain transmit filter, it is necessary to receive second information sent by the network device, where the second information indicates the correspondence between the downlink spatial domain transmit filter and the reference signal.

[0101] In some embodiments, after receiving the second information sent by the network device, the smart reflecting surface uses different downlink spatial domain transmit filters to send multiple reference signals to the terminal device.

[0102] In some embodiments, the correspondence between the downlink spatial domain transmit filter and the reference signal is determined by a smart reflecting surface.

[0103] In some embodiments, after configuring the correspondence between the downlink spatial domain transmit filters and the reference signals, the smart reflective surface uses the corresponding downlink spatial domain transmit filters to send multiple reference signals to the terminal device.

[0104] In some embodiments, the number of downlink spatial domain transmit filters and / or the number of reference signals are configured by a network device, or configured by a smart reflective surface, or are pre-configured.

[0105] In some embodiments, the smart reflecting surface receives first information sent by a terminal device, where the first information is used to indicate a first reference signal.

[0106] In some embodiments, the multiple reference signals have different identification information, and the first information includes identification information of the first reference signal.

[0107] In some embodiments, the different identification information of the multiple reference signals is configured by a smart reflective surface.

[0108] In step 620 , the smart reflecting surface determines a first downlink spatial domain transmit filter adapted to the terminal device based on the first reference signal fed back by the terminal device. The first downlink spatial domain transmit filter is a downlink spatial domain transmit filter corresponding to the first reference signal.

[0109] In some embodiments, the first reference signal is a reference signal with the best received signal quality measured by the terminal device among multiple reference signals.

[0110] In some embodiments, the smart reflecting surface uses a first downlink spatial domain transmit filter to send a first reference signal to a terminal device, so that the terminal device determines a first uplink spatial domain transmit filter that matches the first downlink spatial domain transmit filter.

[0111] In some embodiments, the first reference signal is a CSI-RS, and the smart reflection surface uses a first downlink spatial domain transmission filter to send a set of repeated CSI-RSs to the terminal device in different time domains.

[0112] In some embodiments, the smart reflecting surface receives fourth indication information, where the fourth indication information is used to instruct the smart reflecting surface to use the first downlink spatial domain transmit filter to transmit the first reference signal.

[0113] In some embodiments, the fourth indication information is used to instruct the smart reflecting surface to send the first reference signal in the form of a repeated spatial domain transmit filter.

[0114] The fourth indication information may be the same as or different from the second indication information in the above embodiment, and this application does not limit this.

[0115] In some embodiments, the network device sends fourth indication information to the smart reflecting surface.

[0116] In some embodiments, the smart reflecting surface uses the first downlink spatial domain transmit filter to send the first reference signal to the terminal device according to the fourth indication information.

[0117] In some embodiments, the fourth indication information may include a time-frequency domain position corresponding to the first reference signal.

[0118] In some embodiments, the smart reflecting surface uses the first downlink spatial domain transmit filter to send the first reference signal to the terminal device at different time domain positions according to the fourth indication information.

[0119] In some embodiments, after being able to determine the first reference signal, the smart reflecting surface does not need to receive the fourth indication information and independently uses the first downlink spatial domain transmit filter to send the first reference signal to the terminal device.

[0120] In some embodiments, after receiving the first information, the smart reflecting surface uses a first downlink spatial domain transmit filter to send a first reference signal to the terminal device.

[0121] The above method uses a smart reflecting surface to transmit multiple reference signals to a terminal device using different downlink spatial-domain transmit filters. Based on the terminal device's feedback, the method determines a first downlink spatial-domain transmit filter that is suitable for the terminal device. This method enables spatial-domain transmit filter matching in communication scenarios involving smart reflecting surfaces, thereby improving network performance and communication quality.

[0122] Please refer to FIG7 , which shows a flow chart of a spatial domain transmit filter matching method provided by an embodiment of the present application. The execution subject of each step of the method is a network device. The method may include step 710.

[0123] In step 710, the network device sends third instruction information, where the third instruction information is used to instruct the smart reflecting surface to send multiple reference signals. The multiple reference signals are sent using their respective corresponding downlink spatial domain transmit filters.

[0124] In some embodiments, the network device sends third indication information to the smart reflecting surface.

[0125] In some embodiments, the network device sends first indication information to the terminal device, the first indication information being used to indicate that the smart reflecting surface is to transmit multiple reference signals. In some embodiments, the network device sends first indication information to the terminal device, the first indication information being used to indicate that the smart reflecting surface is to transmit multiple reference signals in the form of non-repeating spatial domain transmit filters.

[0126] In some embodiments, the network device receives first information sent by the terminal device, where the first information is used to indicate a first reference signal among a plurality of reference signals.

[0127] In some embodiments, after receiving the first information sent by the terminal device, the network device sends the first information to the smart reflective surface.

[0128] In some embodiments, the network device sends fourth indication information to the smart reflecting surface, where the fourth indication information is used to instruct the smart reflecting surface to use a first downlink spatial domain transmit filter to transmit the first reference signal, where the first downlink spatial domain transmit filter is a downlink spatial domain transmit filter corresponding to the first reference signal.

[0129] In some embodiments, the network device sends second indication information to the terminal device, the second indication information being used to instruct the smart reflecting surface to transmit the first reference signal spatial domain transmit filter. In some embodiments, the network device sends second indication information to the terminal device, the second indication information being used to instruct the smart reflecting surface to transmit the first reference signal in the form of a repeated spatial domain transmit filter.

[0130] In some embodiments, the first reference signal is a reference signal with the best received signal quality measured by the terminal device among multiple reference signals.

[0131] In some embodiments, the correspondence between the downlink spatial domain transmit filter and the reference signal is determined by a network device, and the network device sends second information to the smart reflecting surface, where the second information is used to indicate the correspondence between the downlink spatial domain transmit filter and the reference signal.

[0132] In some embodiments, the number of downlink spatial domain transmit filters and / or the number of multiple reference signals is configured by a network device, or configured by a smart reflective surface, or is pre-configured.

[0133] In some embodiments, the different identification information of the multiple reference signals is configured by a network device.

[0134] In some embodiments, the network device configures identification information according to the number of downlink spatial domain transmit filters and / or the number of reference signals, and notifies the smart reflecting surface of the identification information corresponding to each reference signal.

[0135] In one example, the network device informs the smart reflecting surface of the CSI-RS ID information bound to each downlink spatial domain transmit filter based on the number of CSI-RSs of the smart reflecting surface.

[0136] In some embodiments, the network device is an access network device or a core network element.

[0137] The above method, instructing the smart reflector surface by the network device to use different downlink spatial domain transmit filters to transmit multiple reference signals, can achieve spatial domain transmit filter matching in communication scenarios involving smart reflectors, thereby improving network performance and communication quality.

[0138] Below, an exemplary solution of the spatial domain transmit filter matching method provided in an embodiment of the present application is introduced. This solution only includes one or several parallel solutions involved in this application. For more parallel solutions, please refer to the remaining embodiments of this document. This solution includes at least one of the following steps:

[0139] 1. The smart reflective surface configures the number of downlink spatial domain transmit filters and / or the number of reference signals, and indicates the number to the network device.

[0140] 2. The network device determines the correspondence between the downlink spatial domain transmit filters and the reference signals according to the number of downlink spatial domain transmit filters and / or the number of reference signals indicated by the smart reflecting surface, and sends second information to the smart reflecting surface.

[0141] 3. The network device sends the third indication information to the intelligent reflective surface and sends the first indication information to the terminal device.

[0142] 4. The intelligent reflecting surface uses different downlink spatial domain transmit filters to send multiple reference signals to the terminal device according to the third indication information.

[0143] 5. The terminal device measures multiple reference signals according to the first indication information to obtain a reference signal with the best received signal quality among the multiple reference signals, that is, the first reference signal.

[0144] 6. The terminal device sends the first information to the smart reflective surface or the network device, or after the terminal device sends the first information to the network device, the network device sends the first information to the smart reflective surface.

[0145] 7. The network device sends fourth instruction information to the intelligent reflective surface and sends second instruction information to the terminal device.

[0146] 8. The smart reflecting surface sends the first reference signal using the first downlink spatial domain transmit filter according to the fourth indication information.

[0147] 9. The terminal device uses different spatial domain receive filters to receive the first reference signal according to the second indication information, and ultimately determines a first uplink spatial domain transmit filter that matches the first downlink spatial domain transmit filter.

[0148] Next, a supplementary explanation is given on the determination of the correspondence between the downlink spatial domain transmit filter and the reference signal in the embodiment of the present application. The following embodiment can be combined with the remaining embodiments of this document to form a complete solution.

[0149] 1. The above correspondence is determined by network equipment

[0150] 1. The above correspondence is determined by the access network equipment

[0151] In some embodiments, the number of downlink spatial domain transmit filters of the smart reflecting surface is configured by a network device, configured by the smart reflecting surface, or preconfigured. The preconfiguration may be preconfigured by the smart reflecting surface based on its own implementation, preconfigured by the network device, or predefined by a protocol, and this application does not limit this.

[0152] In one example, the number of downlink spatial domain transmit filters and / or the number of reference signals are configured by the access network device, that is, in addition to configuring the above-mentioned corresponding relationships, the access network device also configures the number of downlink spatial domain transmit filters and / or reference signals.

[0153] In one example, the number of downlink spatial domain transmit filters and / or the number of reference signals is configured by a core network element. In this case, before the access network device configures the above correspondence, the core network element indicates the number of downlink spatial domain transmit filters and / or the number of reference signals to the access network device.

[0154] In one example, the number of downlink spatial domain transmit filters and / or the number of reference signals is configured by the smart reflection plane. In this case, before the access network device configures the above-mentioned correspondence, the smart reflection plane indicates the number of downlink spatial domain transmit filters and / or the number of reference signals to the access network device. For example, the smart reflection plane indicates the number of CSI-RSs to be used for unicast to the access network device.

[0155] In the case where the above correspondence is determined by the access network device, the access network device sends the second information after completing the configuration of the above correspondence, and correspondingly, the smart reflecting surface and / or the terminal device receives the second information.

[0156] In some embodiments, the access network device sends the second information to the smart reflecting surface and the terminal device separately. For example, the access network device sends the second information directly to the smart reflecting surface. For another example, the access network device sends the second information directly to the terminal device. For another example, the access network device sends the second information to the terminal device via forwarding via the smart reflecting surface.

[0157] In some embodiments, the access network device sends the second information to the terminal device via the smart reflecting surface, and the smart reflecting surface obtains the correspondence between the smart reflecting surface downlink spatial domain transmit filter and the reference signal according to the second information.

[0158] In some embodiments, the access network device sends the second information to the terminal device by broadcasting.

[0159] 2. The above correspondence is determined by the core network element

[0160] Taking the 5G communication system as an example, the core network element can be AMF or other core network elements. Of course, in other communication systems, the core network element can have different names.

[0161] In one example, the number of downlink spatial domain transmit filters and / or the number of multiple reference signals are configured by the core network element, that is, in addition to configuring the above-mentioned corresponding relationships, the core network element also configures the number of downlink spatial domain transmit filters and / or reference signals.

[0162] In one example, the number of downlink spatial domain transmit filters and / or the number of reference signals is configured by the access network device. In this case, before the core network element configures the above correspondence, the access network device indicates the number of downlink spatial domain transmit filters and / or the number of reference signals to the core network element.

[0163] In one example, the number of downlink spatial domain transmit filters and / or the number of reference signals is configured by the smart reflecting surface. In this case, before the core network element configures the above-mentioned correspondence, the smart reflecting surface directly indicates the number of downlink spatial domain transmit filters and / or the number of reference signals to the core network element. Alternatively, the smart reflecting surface first sends the number of downlink spatial domain transmit filters and / or the number of reference signals to the access network device, and the access network device then indicates the above number to the core network element.

[0164] In some embodiments, the core network element directly sends the second information to at least one of the access network device, the intelligent reflecting surface, and the terminal device.

[0165] In some embodiments, the core network element forwards the second information to the terminal device via the intelligent reflection surface.

[0166] In some embodiments, the core network element sends the second information to the access network device. After receiving the second information from the core network element, the access network device sends the second information to the smart reflective surface and / or the terminal device.

[0167] In some embodiments, the network device indicates to the smart reflecting surface the number of downlink spatial domain transmit filters and / or reference signals. The information indicating the number of downlink spatial domain transmit filters and / or reference signals may be included in the second information sent by the network device to the smart reflecting surface, or may be sent separately to the smart reflecting surface. "Sent separately" means that the information is not included in the second information.

[0168] In some embodiments, the network device does not indicate the number of downlink spatial domain transmit filters to the smart reflecting surface, and the smart reflecting surface determines the number of downlink spatial domain transmit filters according to the corresponding relationship indicated in the second information.

[0169] 2. The above correspondence is determined by the intelligent reflective surface

[0170] In one example, the number of downlink spatial domain transmit filters and / or the number of reference signals are determined by the smart reflective surface. That is, in addition to configuring the above correspondence, the smart reflective surface also configures the number of downlink spatial domain transmit filters and / or reference signals.

[0171] In one example, the number of downlink spatial domain transmit filters and / or the number of reference signals is determined by the access network device. In this case, before the smart reflecting surface is configured with the above-mentioned corresponding relationship, the access network device indicates the number of downlink spatial domain transmit filters and / or the number of reference signals to the smart reflecting surface.

[0172] In one example, the number of downlink spatial domain transmit filters and / or the number of reference signals is determined by a core network element. In this case, before configuring the above-mentioned correspondence on the smart reflecting surface, the core network element indicates the number of downlink spatial domain transmit filters and / or the number of reference signals to the smart reflecting surface. Alternatively, the core network element first indicates the number to the access network device, which then indicates the number to the smart reflecting surface.

[0173] In the case where the above correspondence is determined by the smart reflecting surface, optionally, the smart reflecting surface sends the second information after completing the configuration of the above correspondence, and correspondingly, the access network device and / or the terminal device receives the second information.

[0174] In some embodiments, the smart reflecting surface directly sends the second information to the access network device and / or the terminal device.

[0175] In some embodiments, the intelligent reflection surface sends the second information to the access network device, and the access network device then sends the second information to the terminal device.

[0176] In the embodiment of the present application, the smart reflecting surface is configured to transmit multiple reference signals to the terminal device using the corresponding downlink spatial domain transmit filters according to the above correspondence, thereby performing spatial domain transmit filter matching between the smart reflecting surface and the terminal device. The specific spatial domain transmit filter matching method can be found in the above embodiment and will not be repeated here.

[0177] In addition, it should be noted that the different identification information of multiple reference signals can be configured together with the number of downlink spatial domain transmit filters and / or the number of reference signals, or can be configured together with the above-mentioned correspondence, or can be configured separately after the number of downlink spatial domain transmit filters and / or the number of reference signals are determined. This application does not limit this.

[0178] Below, taking the reference signal CSI-RS as an example, an exemplary solution of the spatial domain transmit filter matching method provided in an embodiment of the present application is introduced. Similarly, this solution only includes one or several parallel solutions involved in this application. The specific steps of this solution are as follows:

[0179] First, the smart reflective surface indicates its CSI-RS number to the network device. The network device then notifies the smart reflective surface of the second information and the CSI-RS IDs corresponding to the different CSI-RSs based on the received CSI-RS number. Alternatively, the network device directly notifies the smart reflective surface of the second information and the CSI-RS IDs corresponding to the different CSI-RSs based on the preconfigured CSI-RS number.

[0180] Next, the smart reflector uses different downlink spatial domain transmit filters to send CSI-RS with different IDs and directions to the terminal device at different time domain positions.

[0181] Optionally, the intelligent reflecting surface uses different downlink spatial domain sending filters to send CSI-RS with different IDs and directions to the terminal device at different time domain positions according to the third indication information sent by the network device.

[0182] Then, the terminal device measures CSI-RSs of different IDs according to the first indication information (eg, NZP CSI-RS-ResourceSet) sent by the network device, and obtains the CSI-RS with the best received signal quality as the first reference signal.

[0183] Afterwards, the terminal device sends first information (such as the CSI-RS ID corresponding to the first reference signal) to the network device or the smart reflective surface to report the CSI-RS with the best received signal quality.

[0184] Next, the smart reflecting surface uses the first downlink spatial domain transmit filter to send repeated reported CSI-RSs to the terminal device at different time domain positions.

[0185] Optionally, the intelligent reflecting surface uses the first downlink spatial domain sending filter to send repeated reported CSI-RS to the terminal device at different time domain positions according to the third indication information sent by the network device.

[0186] Finally, the terminal device performs spatial domain receiving filter scanning on its own according to the second indication information sent by the network device, selects the first uplink spatial domain transmitting filter that matches the first downlink spatial domain transmitting filter, and completes the matching of the uplink spatial domain transmitting filter and the downlink spatial domain transmitting filter.

[0187] To summarize, as shown in FIG8 , before the smart reflecting surface sends CSI-RS (CSI-RS1, CSI-RS2, CSI-RS3) with different IDs and directions to the terminal device (not shown in FIG8 ) at different time domain positions, the network device (such as a base station) sends information 81 to the smart reflecting surface that may include one or more of the following information: the initial CSI-RS that needs to be processed or reflected by the smart reflecting surface, the second information, information indicating the number of the above-mentioned downlink spatial domain transmit filters and / or the number of reference signals, CSI-RS ID information, and the third indication information.

[0188] It should be noted that in the above method embodiments, the steps performed by the terminal device can be independently implemented as a spatial domain transmit filter matching method on the terminal device side; the steps performed by the smart reflective surface can be independently implemented as a spatial domain transmit filter matching method on the smart reflective surface side; and the steps performed by the network device can be independently implemented as a spatial domain transmit filter matching method on the network device side. For details not disclosed in any of these embodiments, please refer to the other embodiments.

[0189] The following are device embodiments of the present application, which can be used to implement 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.

[0190] Please refer to Figure 9, which shows a block diagram of a spatial domain transmit filter matching device provided by one embodiment of the present application. This device has the function of implementing the above-mentioned spatial domain transmit filter matching method. This function can be implemented by hardware or by hardware executing corresponding software. This device can be the terminal device described above, or it can be provided in a terminal device. As shown in Figure 9, the device 900 may include: a transceiver module 910.

[0191] The transceiver module 910 is configured to receive multiple reference signals sent by the smart reflecting surface, where the multiple reference signals are sent using their respective corresponding downlink spatial domain transmit filters.

[0192] The transceiver module 910 is further configured to send first information, where the first information is used to indicate a first reference signal among the multiple reference signals.

[0193] In some embodiments, the first reference signal is a reference signal with the best received signal quality measured by the terminal device among the multiple reference signals.

[0194] In some embodiments, the received signal quality includes at least one of the following: SNR, SINR, RSRQ, signal energy, RSRP, and RSSI.

[0195] In some embodiments, the multiple reference signals have different identification information, and the first information includes identification information of the first reference signal.

[0196] In some embodiments, the transceiver module 910 is configured to send the first information to a network device; or to send the first information to the smart reflective surface.

[0197] In some embodiments, the transceiver module 910 is further configured to receive first indication information, where the first indication information is configured to indicate that the smart reflecting surface will send the multiple reference signals in a non-repeated manner.

[0198] In some embodiments, the transceiver module 910 is further used to receive the first reference signal sent by the smart reflecting surface using a first downlink spatial domain transmit filter, where the first downlink spatial domain transmit filter is a downlink spatial domain transmit filter corresponding to the first reference signal; and is further used to determine a first uplink spatial domain transmit filter that matches the first downlink spatial domain transmit filter.

[0199] In some embodiments, the transceiver module 910 is further configured to receive second indication information, where the second indication information is configured to instruct the smart reflecting surface to send the first reference signal spatial domain transmit filter in a repeated manner.

[0200] In some embodiments, the correspondence between the downlink spatial domain transmit filter and the reference signal is determined by a network device and indicated to the smart reflecting surface.

[0201] In some embodiments, the correspondence between the downlink spatial domain transmit filter and the reference signal is determined by the smart reflecting surface.

[0202] In some embodiments, the number of the downlink spatial domain transmit filters and / or the number of the reference signals is configured by a network device, or is configured by the smart reflective surface, or is pre-configured.

[0203] Please refer to Figure 10, which shows a block diagram of a spatial domain transmit filter matching device provided by another embodiment of the present application. This device has the function of implementing the above-mentioned spatial domain transmit filter matching method. This function can be implemented through hardware or by hardware executing corresponding software. This device can be the smart reflective surface described above, or it can be installed in a smart reflective surface. As shown in Figure 10, the device 1000 may include: a transceiver module 1010.

[0204] The transceiver module 1010 is configured to send multiple reference signals to a terminal device, where the multiple reference signals are sent using their respective corresponding downlink spatial domain transmit filters.

[0205] The transceiver module 1010 is further used to determine a first downlink spatial domain transmit filter adapted to the terminal device based on the first reference signal fed back by the terminal device, where the first downlink spatial domain transmit filter is the downlink spatial domain transmit filter corresponding to the first reference signal.

[0206] In some embodiments, the transceiver module 1010 is further configured to receive third indication information, where the third indication information is configured to instruct the smart reflecting surface to use the corresponding downlink spatial domain transmit filters to transmit the multiple reference signals.

[0207] In some embodiments, the transceiver module 1010 is further used to use the first downlink spatial domain transmit filter to send the first reference signal to the terminal device, so that the terminal device determines the first uplink spatial domain transmit filter that matches the first downlink spatial domain transmit filter.

[0208] In some embodiments, the transceiver module 1010 is further configured to receive fourth indication information, where the fourth indication information is configured to instruct the smart reflecting surface to use the first downlink spatial domain transmit filter to transmit the first reference signal.

[0209] In some embodiments, the transceiver module 1010 is further configured to receive first information, where the first information is configured to indicate the first reference signal.

[0210] In some embodiments, the multiple reference signals have different identification information, and the first information includes identification information of the first reference signal.

[0211] In some embodiments, the correspondence between the downlink spatial domain transmit filter and the reference signal is determined by a network device; the transceiver module 1010 is also used to receive second information sent by the network device, and the second information is used to indicate the correspondence between the downlink spatial domain transmit filter and the reference signal.

[0212] In some embodiments, the correspondence between the downlink spatial domain transmit filter and the reference signal is determined by the smart reflecting surface.

[0213] In some embodiments, the number of the downlink spatial domain transmit filters and / or the number of the reference signals is configured by a network device, or is configured by the smart reflective surface, or is pre-configured.

[0214] In some embodiments, the first reference signal is a reference signal with the best received signal quality measured by the terminal device among the multiple reference signals.

[0215] In some embodiments, the received signal quality includes at least one of the following: SNR, SINR, RSRQ, signal energy, RSRP, and RSSI.

[0216] Please refer to Figure 11, which shows a block diagram of a spatial domain transmit filter matching device provided by another embodiment of the present application. This device has the function of implementing the above-mentioned spatial domain transmit filter matching method. The function can be implemented by hardware or by hardware executing corresponding software. The device can be the network device described above, or it can be installed in a network device. As shown in Figure 11, the device 1110 can include: a transceiver module 1110.

[0217] The transceiver module 1110 is configured to send third indication information, where the third indication information is used to instruct the smart reflecting surface to send multiple reference signals, where the multiple reference signals are sent using their respective corresponding downlink spatial domain transmit filters.

[0218] In some embodiments, the transceiver module 1110 is further configured to send first indication information, where the first indication information is configured to instruct the smart reflecting surface to send the multiple reference signals in a non-repeated manner.

[0219] In some embodiments, the transceiver module 1110 is further used to receive first information, where the first information is used to indicate a first reference signal among the multiple reference signals; and is further used to send fourth indication information, where the fourth indication information is used to instruct the smart reflecting surface to use a first downlink spatial domain transmit filter to send the first reference signal, where the first downlink spatial domain transmit filter is a downlink spatial domain transmit filter corresponding to the first reference signal.

[0220] In some embodiments, the transceiver module 1110 is further configured to send second indication information, where the second indication information is configured to instruct the smart reflective surface to send the first reference signal in a repeated manner. Spatial Domain Transmit Filter.

[0221] In some embodiments, the first reference signal is a reference signal with the best received signal quality measured by the terminal device among the multiple reference signals.

[0222] In some embodiments, the received signal quality includes at least one of the following: SNR, SINR, RSRQ, signal energy, RSRP, and RSSI.

[0223] In some embodiments, the correspondence between the downlink spatial domain transmit filter and the reference signal is determined by the network device; the transceiver module 1110 is also used to send second information, and the second information is used to indicate the correspondence between the downlink spatial domain transmit filter and the reference signal.

[0224] In some embodiments, the number of the downlink spatial domain transmit filters and / or the number of the reference signals is configured by a network device, or is configured by the smart reflective surface, or is pre-configured.

[0225] In some embodiments, the network device is an access network device or a core network element.

[0226] It should be noted that, when the device provided in the above embodiment realizes its function, it only uses the division of the above-mentioned functional modules as an example. In actual application, the above-mentioned functions can be assigned to different functional modules according to actual needs, that is, the content structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0227] Regarding the device in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here. For details not described in detail in the embodiment of the device, reference can be made to the above method embodiment.

[0228] Please refer to Figure 12, which shows a schematic diagram of the structure of a communication device provided by one embodiment of the present application. The communication device can be the aforementioned terminal device, the aforementioned smart reflective surface, or the aforementioned network device. The communication device 1200 may include: a processor 1201, a transceiver 1202, and a memory 1203. The transceiver 1202 is used to implement the functions of the aforementioned transceiver module, and the processor 1201 may be used to implement other processing functions or control transmission and / or reception.

[0229] The processor 1201 includes one or more processing cores. The processor 1201 executes various functional applications and information processing by running software programs and modules.

[0230] The transceiver 1202 may include a receiver and a transmitter. For example, the receiver and the transmitter may be implemented as the same wireless communication component, which may include a wireless communication chip and a radio frequency antenna.

[0231] The memory 1203 may be connected to the processor 1201 and the transceiver 1202 .

[0232] The memory 1203 may be used to store a computer program executed by the processor, and the processor 1201 is used to execute the computer program to implement each step in the above method embodiment.

[0233] In an exemplary embodiment, when the communication device is a terminal device, the transceiver 1202 is used to receive multiple reference signals sent by the smart reflecting surface, and the multiple reference signals are sent using their respective corresponding downlink spatial domain transmit filters; and send first information, where the first information is used to indicate the first reference signal among the multiple reference signals.

[0234] In an exemplary embodiment, when the communication device is an intelligent reflecting surface, the transceiver 1202 is used to send multiple reference signals to the terminal device, and the multiple reference signals are sent using their respective corresponding downlink spatial domain transmit filters; based on the first reference signal fed back by the terminal device, a first downlink spatial domain transmit filter adapted to the terminal device is determined, and the first downlink spatial domain transmit filter is the downlink spatial domain transmit filter corresponding to the first reference signal.

[0235] In an exemplary embodiment, when the communication device is a network device, the transceiver 1202 is used to send third indication information, where the third indication information is used to instruct the smart reflecting surface to send multiple reference signals, and the multiple reference signals are sent using their respective corresponding downlink spatial domain transmit filters.

[0236] For details not described in detail in this embodiment, please refer to the above embodiments and will not be described in detail here.

[0237] In addition, the memory can be implemented by any type of volatile or non-volatile storage device or a combination thereof, including but not limited to: magnetic or optical disks, electrically erasable programmable read-only memory, erasable programmable read-only memory, static random access memory, read-only memory, magnetic memory, flash memory, and programmable read-only memory.

[0238] The embodiment of the present application also provides a computer-readable storage medium, in which a computer program is stored, and the computer program is used to be executed by a processor to implement the spatial domain transmission filter matching method on the above-mentioned terminal device side, or to implement the spatial domain transmission filter matching method on the above-mentioned smart reflective surface side, or to implement the spatial domain transmission filter matching method on the above-mentioned network device side. In some embodiments, the computer-readable storage medium may include: ROM (Read-Only Memory), RAM (Random-Access Memory), SSD (Solid State Drives) or optical disks, etc. Among them, random access memory may include ReRAM (Resistance Random Access Memory) and DRAM (Dynamic Random Access Memory).

[0239] An embodiment of the present application also provides a chip, which includes a programmable logic circuit and / or program instructions. When the chip is running, it is used to implement the spatial domain transmission filter matching method on the above-mentioned terminal device side, or to implement the spatial domain transmission filter matching method on the above-mentioned intelligent reflection surface side, or to implement the spatial domain transmission filter matching method on the above-mentioned network device side.

[0240] An embodiment of the present application also provides a computer program product, which includes a computer program, which is stored in a computer-readable storage medium. The processor reads and executes the computer program from the computer-readable storage medium to implement the spatial domain transmission filter matching method on the above-mentioned terminal device side, or implements the spatial domain transmission filter matching method on the above-mentioned smart reflection surface side, or implements the spatial domain transmission filter matching method on the above-mentioned network device side.

[0241] It should be understood that the "indication" mentioned in the embodiments of this application can be a direct indication, an indirect indication, or an indication of an association. For example, "A indicates B" can mean that A directly indicates B, for example, B can be obtained through A; it can also mean that A indirectly indicates B, for example, A indicates C, and B can be obtained through C; it can also mean that there is an association between A and B.

[0242] In the description of the embodiments of the present application, the term "corresponding" may indicate a direct or indirect correspondence between the two, or an association relationship between the two, or a relationship between indication and being indicated, configuration and being configured, etc.

[0243] In some embodiments of the present application, "predefined" may be implemented by pre-storing corresponding codes, tables, or other methods that can be used to indicate relevant information in a device (e.g., including a terminal device and a network device), and the present application does not limit the specific implementation method. For example, predefined may refer to information defined in a protocol.

[0244] In some embodiments of the present application, the "protocol" may refer to a standard protocol in the field of communications, for example, it may include an LTE protocol, a NR protocol, and related protocols used in future communication systems, and this application does not limit this.

[0245] In this document, "plurality" refers to two or more. "And / or" describes a relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can mean: A exists alone, A and B exist simultaneously, or B exists alone. The character " / " generally indicates an "or" relationship between the associated objects.

[0246] The term “greater than or equal to” mentioned herein may mean greater than or equal to, or greater than, and the term “less than or equal to” may mean less than or equal to, or less than.

[0247] In addition, the step numbers described in this document only illustrate a possible execution order between the steps. In some other embodiments, the above steps may not be executed in the order of the numbers, such as two steps with different numbers are executed at the same time, or two steps with different numbers are executed in the opposite order of the diagram. The embodiments of the present application are not limited to this.

[0248] Those skilled in the art will appreciate that in one or more of the above examples, the functions described in the embodiments of the present application can be implemented using hardware, software, firmware, or any combination thereof. When implemented using software, these functions can be stored in a computer-readable medium or transmitted as one or more instructions or codes on a computer-readable medium. Computer-readable media include computer storage media and communication media, wherein communication media include any media that facilitates the transmission of computer programs from one place to another. The storage medium can be any available medium that can be accessed by a general-purpose or special-purpose computer.

[0249] The above description is merely an exemplary embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A spatial domain transmit filter matching method, characterized in that: The method is performed by a terminal device, and the method includes: Receiving multiple reference signals sent by the smart reflective surface, wherein the multiple reference signals are sent using respective corresponding downlink spatial domain transmit filters; First information is sent, where the first information is used to indicate a first reference signal among the multiple reference signals.

2. The method according to claim 1, characterized in that The first reference signal is a reference signal with the best received signal quality measured by the terminal device among the multiple reference signals.

3. The method according to claim 2, characterized in that The received signal quality includes at least one of the following: signal-to-noise ratio SNR, signal-to-interference-plus-noise ratio SINR, reference signal received quality RSRQ, signal energy, reference signal received power RSRP, and received signal strength indication RSSI.

4. The method according to any one of claims 1 to 3, characterized in that: The multiple reference signals have different identification information, and the first information includes the identification information of the first reference signal.

5. The method according to any one of claims 1 to 4, characterized in that: The sending of the first information includes: Sending the first information to a network device; or, The first information is sent to the smart reflective surface.

6. The method according to any one of claims 1 to 5, characterized in that: The method further comprises: First indication information is received, where the first indication information is used to indicate that the smart reflecting surface is to send the multiple reference signals in the form of a non-repetitive spatial domain transmit filter.

7. The method according to any one of claims 1 to 6, characterized in that: The method further comprises: receiving the first reference signal sent by the smart reflecting surface using a first downlink spatial domain sending filter, where the first downlink spatial domain sending filter is a downlink spatial domain sending filter corresponding to the first reference signal; A first uplink spatial domain transmit filter that matches the first downlink spatial domain transmit filter is determined.

8. The method according to any one of claims 1 to 7, characterized in that: The method further comprises: Second indication information is received, where the second indication information is used to indicate that the smart reflecting surface is to send the first reference signal spatial domain transmit filter in the form of a repeated spatial domain transmit filter.

9. The method according to any one of claims 1 to 8, characterized in that: The corresponding relationship between the downlink spatial domain transmission filter and the reference signal is determined by a network device and indicated to the smart reflection surface.

10. The method according to any one of claims 1 to 9, characterized in that: The corresponding relationship between the downlink spatial domain transmission filter and the reference signal is determined by the smart reflection surface.

11. The method according to any one of claims 1 to 10, characterized in that: The number of the downlink spatial domain transmission filters and / or the number of the reference signals are configured by a network device, or are configured by the smart reflection surface, or are pre-configured.

12. A spatial domain transmit filter matching method, characterized in that: The method is performed by a smart reflective surface, and the method comprises: Sending multiple reference signals to a terminal device, where the multiple reference signals are sent using respective corresponding downlink spatial domain transmit filters; A first downlink spatial domain transmit filter adapted to the terminal device is determined according to a first reference signal fed back by the terminal device, where the first downlink spatial domain transmit filter is a downlink spatial domain transmit filter corresponding to the first reference signal.

13. The method according to claim 12, characterized in that The method further comprises: Third indication information is received, where the third indication information is used to instruct the smart reflecting surface to send the multiple reference signals.

14. The method according to claim 12 or 13, characterized in that The method further comprises: The first reference signal is sent to the terminal device using the first downlink spatial domain transmit filter so that The terminal device determines a first uplink spatial domain transmit filter that matches the first downlink spatial domain transmit filter.

15. The method according to any one of claims 12 to 14, characterized in that The method further comprises: Fourth indication information is received, where the fourth indication information is used to instruct the smart reflecting surface to use the first downlink spatial domain transmitting filter to send the first reference signal.

16. The method according to any one of claims 12 to 15, characterized in that The method further comprises: First information is received, where the first information is used to indicate the first reference signal.

17. The method according to claim 16, characterized in that The multiple reference signals have different identification information, and the first information includes the identification information of the first reference signal.

18. The method according to any one of claims 12 to 17, characterized in that The correspondence between the downlink spatial domain transmission filter and the reference signal is determined by a network device; the method further includes: Second information sent by a network device is received, where the second information is used to indicate a corresponding relationship between the downlink spatial domain transmit filter and the reference signal.

19. The method according to any one of claims 12 to 18, characterized in that The corresponding relationship between the downlink spatial domain transmission filter and the reference signal is determined by the smart reflection surface.

20. The method according to any one of claims 12 to 19, characterized in that The number of the downlink spatial domain transmission filters and / or the number of the reference signals are configured by a network device, or are configured by the smart reflection surface, or are pre-configured.

21. The method according to any one of claims 12 to 20, characterized in that The first reference signal is a reference signal with the best received signal quality measured by the terminal device among the multiple reference signals.

22. The method according to claim 21, characterized in that The received signal quality includes at least one of the following: signal-to-noise ratio SNR, signal-to-interference-plus-noise ratio SINR, reference signal received quality RSRQ, signal energy, reference signal received power RSRP, and received signal strength indication RSSI.

23. A spatial domain transmit filter matching method, characterized in that: The method is performed by a network device, and the method includes: Send third indication information, where the third indication information is used to instruct the smart reflecting surface to send multiple reference signals, where the multiple reference signals are sent using respectively corresponding downlink spatial domain sending filters.

24. The method according to claim 23, characterized in that The method further comprises: Sending first indication information, where the first indication information is used to indicate that the smart reflecting surface will send the multiple reference signals in a non-repetitive form.

25. The method according to claim 23 or 24, characterized in that The method further comprises: receiving first information, where the first information is used to indicate a first reference signal among the multiple reference signals; Send fourth indication information, where the fourth indication information is used to instruct the smart reflecting surface to use a first downlink spatial domain transmit filter to send the first reference signal, where the first downlink spatial domain transmit filter is a downlink spatial domain transmit filter corresponding to the first reference signal.

26. The method according to claim 25, characterized in that The method further comprises: Sending second indication information, where the second indication information is used to instruct the smart reflecting surface to send the first reference signal spatial domain transmit filter in a repeated form.

27. The method according to claim 25 or 26, characterized in that The first reference signal is a reference signal with the best received signal quality measured by the terminal device among the multiple reference signals.

28. The method according to claim 27, characterized in that The received signal quality includes at least one of the following: signal-to-noise ratio SNR, signal-to-interference-plus-noise ratio SINR, reference signal received quality RSRQ, signal energy, reference signal received power RSRP, and received signal strength indication RSSI.

29. The method according to any one of claims 23 to 28, characterized in that The correspondence between the downlink spatial domain transmission filter and the reference signal is determined by the network device; the method further includes: Sending second information, wherein the second information is used to indicate the relationship between the downlink spatial domain transmission filter and the reference signal The corresponding relationship.

30. The method according to any one of claims 23 to 29, characterized in that The number of the downlink spatial domain transmission filters and / or the number of the reference signals are configured by a network device, or are configured by the smart reflection surface, or are pre-configured.

31. The method according to any one of claims 23 to 30, characterized in that The network device is an access network device or a core network element.

32. A spatial domain transmission filter matching device, characterized in that: The device is arranged in a terminal device, and comprises: A transceiver module, used to receive multiple reference signals sent by the smart reflective surface, wherein the multiple reference signals are sent using respective corresponding downlink spatial domain transmit filters; The transceiver module is further used to send first information, where the first information is used to indicate a first reference signal among the multiple reference signals.

33. A spatial domain transmission filter matching device, characterized in that: The device is arranged in the intelligent reflecting surface, and comprises: A transceiver module, used to send multiple reference signals to a terminal device, wherein the multiple reference signals are sent using respective corresponding downlink spatial domain transmit filters; The transceiver module is further used to determine a first downlink spatial domain transmit filter adapted to the terminal device based on a first reference signal fed back by the terminal device, wherein the first downlink spatial domain transmit filter is a downlink spatial domain transmit filter corresponding to the first reference signal.

34. A spatial domain transmission filter matching device, characterized in that: The device is arranged in a network device, and comprises: The transceiver module is used to send third indication information, where the third indication information is used to instruct the smart reflecting surface to send multiple reference signals, and the multiple reference signals are sent using their respective corresponding downlink spatial domain sending filters.

35. A communication device, characterized in that: The communication device includes a processor and a memory, wherein a computer program is stored in the memory, and the processor executes the computer program to implement the method according to any one of claims 1 to 11, or to implement the method according to any one of claims 12 to 22, or to implement the method according to any one of claims 23 to 31.

36. A computer-readable storage medium, characterized in that: The storage medium stores a computer program, which is used to be executed by a processor to implement the method according to any one of claims 1 to 11, or to implement the method according to any one of claims 12 to 22, or to implement the method according to any one of claims 23 to 31.

37. A chip, characterized in that: The chip includes a programmable logic circuit and / or program instructions, which, when running, is used to implement the method described in any one of claims 1 to 11, or to implement the method described in any one of claims 12 to 22, or to implement the method described in any one of claims 23 to 31.

38. A computer program product, characterized in that The computer program product includes computer instructions, which are stored in a computer-readable storage medium. The processor reads and executes the computer instructions from the computer-readable storage medium to implement the method as claimed in any one of claims 1 to 11, or implements the method as claimed in any one of claims 12 to 22, or implements the method as claimed in any one of claims 23 to 31.

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