Signal forwarding method and device, RIS node and network equipment

Abstract

The invention provides a signal forwarding method and device, an RIS node and network equipment, and the method comprises the steps that a reconfigurable intelligent surface RIS node forwards a non-target signal on a first time-frequency resource unit based on first forwarding configuration, and the first forwarding configuration is the forwarding configuration for the non-target signal; the first forwarding configuration is related to the resource configuration of the first time-frequency resource unit and / or the state of the RIS node.

Description

Technical Field

[0001] The present application relates to the field of communications, and more specifically, to a signal forwarding method and device, a RIS node, and a network device. Background Art

[0002] Reconfigurable Intelligent Surface (RIS) nodes are used to forward signals between base stations and terminal devices. When the RIS node is required to forward the target signal, the base station can provide the RIS node with forwarding beam parameter configuration, so that the RIS node can send the target signal to the target direction based on the forwarding beam parameter configuration. When the RIS node is not required to forward the target signal, the RIS node uses diffuse reflection or random beams for passive forwarding, resulting in uncontrollable interference to the system and a high level of interference. Summary of the invention

[0003] The present application provides a signal forwarding method and apparatus, a RIS node and a network device, which are conducive to making the interference to the system controllable and reducing the interference level.

[0004] In a first aspect, a method for signal forwarding is provided, comprising: a reconfigurable intelligent surface RIS node forwards a non-target signal based on a first forwarding configuration on a first time-frequency resource unit, wherein the first forwarding configuration is a forwarding configuration for the non-target signal, and the first forwarding configuration is related to the resource configuration of the first time-frequency resource unit and / or the state of the RIS node.

[0005] In a second aspect, a method for signal forwarding is provided, comprising: a network device sends first configuration information to a reconfigurable intelligent surface RIS node, the first configuration information comprising one or more forwarding configurations for non-target signal forwarding, the one or more forwarding configurations being applicable to at least one resource configuration, and / or the one or more forwarding configurations being applicable to a specific state of the RIS node.

[0006] In a third aspect, a signal forwarding device is provided, including:

[0007] A communication unit, used to forward a non-target signal based on a first forwarding configuration on a first time-frequency resource unit, wherein the first forwarding configuration is a forwarding configuration for non-target signals, and the first forwarding configuration is related to the resource configuration of the first time-frequency resource unit and / or the state of the device.

[0008] In a fourth aspect, a signal forwarding device is provided, including:

[0009] A communication unit is used to send first configuration information to a reconfigurable intelligent surface (RIS) node, wherein the first configuration information includes one or more forwarding configurations for forwarding non-target signals, wherein the one or more forwarding configurations are applicable to at least one resource configuration, and / or the one or more forwarding configurations are applicable to a specific state of the RIS node.

[0010] In a fifth aspect, a reconfigurable intelligent surface RIS node is provided, comprising a processor and a memory; wherein the memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to execute the method in the above-mentioned first aspect or its various implementation methods.

[0011] In a sixth aspect, a network device is provided, comprising a processor and a memory; wherein the memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to execute the method in the above-mentioned second aspect or its various implementation methods.

[0012] In a seventh aspect, a chip is provided for implementing the method in any one of the first to second aspects or their respective implementations. Specifically, the chip includes: a processor for calling and running a computer program from a memory, so that a device equipped with the chip executes the method in any one of the first to second aspects or their respective implementations.

[0013] In an eighth aspect, a computer-readable storage medium is provided for storing a computer program, wherein the computer program enables a computer to execute the method of any one of the first to second aspects or any of their implementations.

[0014] In a ninth aspect, a communication system is provided, the communication system comprising the RIS node as described in the fifth aspect and the network device as described in the sixth aspect. Optionally, the communication system further comprises a terminal device.

[0015] In a tenth aspect, a computer program is provided, which, when executed on a computer, enables the computer to execute the method in any one of the first to second aspects or in each of their implementations.

[0016] Based on the above technical solution, on the first time-frequency resource unit, the RIS node can forward non-target signals based on the first forwarding configuration, the first forwarding configuration is a forwarding configuration for non-target signals, and the first forwarding configuration is related to the resource configuration of the first time-frequency resource unit and / or the state of the RIS node. That is to say, in the embodiment of the present application, the forwarding configuration for non-target signals can be designed based on the resource configuration of the time-frequency resource unit and / or the state of the RIS node, so as to achieve controllable interference to the system and reduce the interference level. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative labor.

[0018] Figure 1 It is a schematic diagram of a communication system provided in an embodiment of the present application.

[0019] Figure 2 It is a logical structure diagram of a RIS node provided in an embodiment of the present application.

[0020] Figure 3 It is a schematic flowchart of the signal forwarding method provided in an embodiment of the present application.

[0021] Figure 4 It is a schematic diagram of a periodic forwarding configuration provided in an embodiment of the present application.

[0022] Figure 5 It is a schematic diagram of a correspondence between time-frequency resource units of different resource types and forwarding configurations provided in an embodiment of the present application.

[0023] Figure 6 It is a schematic diagram of another correspondence between time-frequency resource units of different resource types and forwarding configurations provided in an embodiment of the present application.

[0024] Figure 7 It is a schematic flowchart of another signal forwarding method provided in an embodiment of the present application.

[0025] Figure 8 It is a schematic block diagram of a signal forwarding device provided in an embodiment of the present application.

[0026] Fig. 9 It is a schematic block diagram of another signal forwarding device provided in an embodiment of the present application.

[0027] Fig.10 It is a schematic block diagram of a communication device provided in an embodiment of the present application.

[0028] Fig.11 It is a schematic block diagram of a chip provided in an embodiment of the present application.

[0029] Fig.12 It is a schematic block diagram of a communication system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0030] The following will describe the technical solutions in the embodiments of the present application in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. For the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0031] The terms used in the embodiments of the present application are only used to explain the specific embodiments of the present application, rather than to limit the present application. The terms "first", "second", "third" and "fourth" in the specification and claims of the present application and the drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, the process, method, system, product or equipment comprising a series of steps or units need not be limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or equipment. In addition, "and / or" is used in the specification and claims to represent at least one of the connected objects, such as A and / or B and / or C, indicating that A alone, B alone, C alone, and A and B all exist, B and C all exist, A and C all exist, and 7 situations in which A, B and C all exist.

[0032] It should be understood that the "indication" mentioned in the embodiments of the present application can be a direct indication, an indirect indication, or an indication of an association relationship. For example, A indicates B, which can mean that A directly indicates B, such as B can be obtained through A, such as A includes B; it can also mean that A indirectly indicates B, such as A indicates C, B can be obtained through C; it can also mean that there is an association relationship between A and B.

[0033] In the description of the embodiments of the present application, the term "corresponding" may indicate a direct or indirect correspondence between two items, or an association relationship between the two items, or a relationship between indication and being indicated, configuration and being configured, and the like.

[0034] In the embodiments of the present application, "pre-definition" can be implemented by pre-storing corresponding codes, tables or other methods that can be used to indicate relevant information in a device (for example, including a terminal device, a RIS node and a network device), and the present application does not limit the specific implementation method. For example, pre-definition can refer to what is defined in the protocol.

[0035] In the embodiments of the present application, the "protocol" may refer to a standard protocol in the communication field, for example, it may include an LTE protocol, a NR protocol, a Wi-Fi protocol, and related protocols used in future communication systems, and the present application does not limit this.

[0036] The technical solutions of the embodiments of the present application can be applied to various communication systems, such as: Long Term Evolution (LTE) system, Advanced long term evolution (LTE-A) system, New Radio (NR) system, NR system evolution system, LTE on unlicensed spectrum (LTE-U) system, NR on unlicensed spectrum (NR-based access to unlicensed spectrum, NR-U) system, Non-Terrestrial Networks (NTN) system, Universal Mobile Telecommunication System (UMTS), Wireless Local Area Networks (WLAN), Internet of Things (IoT), Wireless Fidelity (WiFi), Fifth Generation Communication (5G) system, Sixth Generation Communication (6G) system or other evolved communication systems.

[0037] For example, the communication system 100 used in the embodiment of the present application can be as follows: Figure 1 As shown, the communication system 100 may include a terminal device 110 , a reconfigurable intelligent surface (RIS) node 120 and a network device 130 .

[0038] In some embodiments, the terminal device 110 can be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer), a notebook computer, a personal digital assistant (PDA), a handheld computer, a netbook, an ultra-mobile personal computer (Ultra-mobile Personal Computer, UMPC), a mobile Internet device (Mobile Internet Device, MID), an augmented reality (Augmented Reality, AR), a virtual reality (Virtual Reality, VR) device, a robot, a wearable device (Wearable Device), an aircraft (flight vehicle), a vehicle user equipment (VUE), a shipborne equipment, a pedestrian terminal (Pedestrian User Equipment, PUE), a smart home (home appliances with wireless communication functions, such as refrigerators, televisions, washing machines or furniture, etc.), a game console, a personal computer (Personal Computer, PC), a teller machine or a self-service machine and other terminal side devices. Wearable devices include: smart watches, smart bracelets, smart headphones, smart glasses, smart jewelry (smart bracelets, smart bracelets, smart rings, smart necklaces, smart anklets, smart anklets, etc.), smart wristbands, smart clothing, etc. Among them, vehicle-mounted equipment can also be called vehicle-mounted terminals, vehicle-mounted controllers, vehicle-mounted modules, vehicle-mounted components, vehicle-mounted chips or vehicle-mounted units, etc.

[0039] In some embodiments, the network device 130 may include an access network device, or a radio access network (RAN) device, a radio access network node, a radio access network function, or a radio access network unit. The access network device may include a base station, a wireless local area network (WLAN) access point (AS), or a wireless fidelity (WiFi) node, etc. Among them, the base station can be called Node B (NodeB, NB), evolved Node B (Evolved Node B, eNB), the next generation Node B (the next generation Node B, gNB), new radio Node B (New Radio Node B, NR Node B), access point, relay station (Relay Base Station, RBS), serving base station (Serving Base Station, SBS), base transceiver station (Base Transceiver Station, BTS), radio base station, radio transceiver, basic service set (Basic Service Set, BSS), extended service set (Extended Service Set, ESS), home Node B (home evolved Node B, HNB), home evolved Node B (home evolved Node B), transmission reception point (Transmission Reception Point, TRP) or other appropriate terms in the field. As long as the same technical effect is achieved, the base station is not limited to specific technical vocabulary.

[0040] In some embodiments, the network device 130 may also include a core network (CN) device, or a core network node, a core network function or a core network unit, etc. For example, the core network functions may include but are not limited to at least one of the following: Mobility Management Entity (MME), Access and Mobility Management Function (AMF), Session Management Function (SMF), User Plane Function (UPF), Policy Control Function (PCF), Policy and Charging Rules Function (PCRF), Edge Application Server Discovery Function (EASDF), Unified Data Management (UDM), Unified Data Repository (UDR), Home Subscriber Server (HSS), Centralized Network Configuration (CNC), Network Repository Function (NRF), Network Exposure Function (NEF), Local NEF (L-NEF), Binding Support Function (Binding Support Function (BSF), application function (Application Function, AF), operation management and maintenance (OAM), etc.

[0041] In some embodiments, the RIS node 120 can be modeled as a RIS-terminal (Mobile Termination, MT) functional unit and a forwarding unit (RIS forwarding unit, RIS-FWD), Figure 2An example of the logical structure of a RIS node is shown. The RIS-MT functional unit is used for the RIS node to establish a wireless connection with an access network device (such as a serving base station), and the RIS node sends a measurement report of the RIS node to the serving base station and a forwarding control signaling of the serving base station to the RIS node; the RIS-FWD unit is used to forward and transmit signals between the serving base station and the UE, and the signals include, but are not limited to, synchronization signal blocks (Synchronization Signal and PBCH block, SSB), system messages, uplink and downlink dedicated signaling, uplink and downlink control channels, and uplink and downlink data signals.

[0042] The RIS-MT functional unit may use an independent antenna or share the antenna on the RIS-FWD unit. There may be a RIS-FWD control unit (e.g., a panel controller) between the RIS-MT functional unit and the RIS-FWD unit. The RIS-MT functional unit sends the received RIS-FWD control command to the RIS-FWD control unit, and the RIS-FWD control unit controls the RIS-FWD unit. The access network device may control the forwarding parameters of the RIS-FWD unit, including the incident beam parameters and the forwarding beam parameters, by sending a signaling (e.g., sending through a control link) for controlling the RIS-FWD unit to the RIS-MT functional unit. The RIS-FWD unit of the RIS node 120 may be a passive radio signal incident / forwarding panel, for example, the incident / forwarding panel includes an incident / forwarding array composed of several forwarding units, and the access network device may achieve the purpose of controlling the forwarding beam of the RIS-FWD unit by configuring the phase / amplitude matrix of the incident / forwarding array. Among them, the link between the access network equipment and the RIS-MT functional unit is called the control link, the link from the RIS-FWD unit to the access network equipment is called the backhaul (BH) link, and the link from the RIS-FWD unit to the terminal equipment is called the access link.

[0043] In some embodiments, the RIS node 120 may be a reflective RIS node, or a refractive RIS node. The reflective RIS node is used to transmit an incident target signal to a target direction, while the refractive RIS node is used to refract an incident signal to a target direction.

[0044] In the related art, when the RIS node is required to forward the target signal, the network device can provide the RIS node with a forwarding beam parameter configuration, so that the RIS node can send the target signal to the target direction based on the forwarding beam parameter configuration. When the RIS node is not required to forward the target signal, the RIS node will perform passive forwarding. Specifically, the RIS node will use diffuse reflection or random refraction to forward non-target signals, which will produce unpredictable random interference beams, that is, the interference to the system is uncontrollable. If this random interference beam covers the base station or UE in the receiving state, it will significantly reduce the SINR of the target signal received by the base station or UE. Therefore, how to forward non-target signals to reduce the interference caused by the RIS node forwarding signals is an urgent problem to be solved.

[0045] To facilitate understanding of the technical solutions of the embodiments of the present application, the technical solutions of the present application are described in detail below through specific embodiments. The above related technologies can be combined arbitrarily with the technical solutions of the embodiments of the present application as optional solutions, and they all belong to the protection scope of the embodiments of the present application. The embodiments of the present application include at least part of the following contents.

[0046] Figure 3 is a schematic flow chart of a signal forwarding method 30 according to an embodiment of the present application, such as Figure 3 As shown, the method 30 may include at least part of the following:

[0047] S301, a reconfigurable smart surface RIS node forwards a non-target signal on a first time-frequency resource unit based on a first forwarding configuration, wherein the first forwarding configuration is a forwarding configuration for the non-target signal, and the first forwarding configuration is related to the resource configuration of the first time-frequency resource unit and / or the state of the RIS node.

[0048] It should be understood that in the embodiments of the present application, non-target signals may refer to signals other than target signals, and the target signals may refer to signals that need to be forwarded by the RIS node. For example, the target signals may include but are not limited to SSB, system messages, uplink and downlink dedicated signaling, uplink and downlink control channels, and uplink and downlink data signals.

[0049] In some embodiments, non-target signals include, but are not limited to, one or more of the following signals:

[0050] The incident signal when the RIS node is not configured by the network device to forward the target signal;

[0051] The RIS node determines the incident signal when the target signal is not forwarded according to the preconfigured conditions;

[0052] The incident signal after the MT functional unit (or RIS-MT functional unit) of the RIS node enters the Radio Resource Control (RRC) inactive state;

[0053] The incident signal when the MT functional unit of the RIS node enters the RRC inactive state and does not need to forward the target signal;

[0054] The incident signal after the MT functional unit of the RIS node enters the RRC idle (IDLE) state;

[0055] After the MT functional unit of the RIS node enters the RRC idle state, there is no need to forward the incident signal when the target signal is forwarded.

[0056] In some embodiments, the preconfigured conditions may include, but are not limited to, an abnormality in the backhaul link between the RIS node and the network device, such as a radio link failure (RLF) or a beam failure (BeamFailure), or the link quality of the backhaul link is less than a preset threshold, the RIS node and the network device are out of sync, etc.

[0057] Optionally, the link quality of the backhaul link may include, but is not limited to, at least one of the following:

[0058] Reference Signal Receiving Power (RSRP), Reference Signal Receiving Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Received Signal Strength Indication (RSSI).

[0059] Optionally, the preset threshold may include at least one of an RSRP threshold, an RSRQ threshold, an SINR, and an RSSI threshold.

[0060] Optionally, the preset threshold may be predefined or configured by the network device.

[0061] It should be understood that the present application does not limit the time domain length and frequency domain length occupied by the first time-frequency resource unit.

[0062] For example, in the time domain, the first time-frequency resource unit may occupy one or more time units, which may be time units defined in the communication system, such as symbols, time slots, subframes, frames, etc. That is, the first time-frequency resource unit may occupy one or more symbols, or one or more time slots, or one or more subframes, etc.

[0063] For example, in the frequency domain, the first time-frequency resource unit may occupy one or more frequency domain units, which may be frequency domain units defined in a communication system, such as a physical resource block (PRB), a subcarrier, a carrier, a bandwidth part (Band Width Part, BWP), etc. That is, the first time-frequency resource unit may occupy one or more PRBs, or one or more subcarriers, or one or more carriers, etc.

[0064] In some embodiments, the first time-frequency resource unit is a time-frequency resource unit that the RIS node does not need to forward the target signal. The scenario in which the RIS node does not need to forward the target signal may include, but is not limited to, one or more of the following scenarios: the network device is not configured with the RIS node to forward the target signal, the RIS node determines on its own that it does not need to forward the target signal, such as determining it according to a preconfigured condition, or other scenarios in which the target signal does not need to be forwarded, such as the MT function unit of the RIS node entering the RRC inactive state or the RRC idle state.

[0065] In some embodiments, the first forwarding configuration is a forwarding configuration for non-target signals, which can be understood as the first forwarding configuration being a dedicated configuration for forwarding non-target signals. For example, when the RIS node does not need to forward the target signal, the RIS node can forward the non-target signal based on the forwarding configuration for the non-target signal.

[0066] In some embodiments, the first forwarding configuration is related to the resource configuration of the first time-frequency resource unit and includes:

[0067] The resource type to which the first forwarding configuration is applicable includes the resource type of the first time-frequency resource unit; and / or,

[0068] The time-frequency resource units to which the first forwarding configuration is applicable include the first time-frequency resource units.

[0069] In some embodiments, the resource type of the first time-frequency resource unit is one of the following:

[0070] Uplink time-frequency resource unit, downlink time-frequency resource unit, flexible time-frequency resource unit.

[0071] It should be understood that the flexible time-frequency resource unit means that the time-frequency resource unit can be used as an uplink time-frequency resource unit, or can also be used as a downlink time-frequency resource unit. That is, the uplink and downlink states of the flexible time-frequency resource unit are uncertain.

[0072] For time-frequency resource units of different resource types, the potential interference objects are different. For example, for uplink time-frequency resource units, the potential interference object is the receiver of the network device, that is, the non-target signal forwarded on the uplink time-frequency resource unit may interfere with the receiver of the network device; for downlink time-frequency resource units, the potential interference object is the terminal device under the interference signal coverage of the RIS node, that is, the non-target signal forwarded on the downlink time-frequency resource unit may interfere with the receiver of the terminal device; for flexible time-frequency resource units, the potential interference objects may include network devices and terminal devices, that is, the non-target signal forwarded on the flexible time-frequency resource unit may interfere with the receivers of both the network device and the terminal device.

[0073] Therefore, in the embodiment of the present application, designing a corresponding forwarding configuration based on the resource type of the time-frequency resource unit is conducive to achieving effective interference control.

[0074] For example, the forwarding configuration applicable to the uplink time-frequency resource unit is designed to control the forwarding beam generated by the RIS node during passive forwarding to avoid the network device that is receiving the communication signal.

[0075] For another example, the forwarding configuration applicable to the downlink time-frequency resource unit is designed to control the forwarding beam generated by the RIS node during passive forwarding to avoid the terminal device that is receiving the communication signal.

[0076] For another example, the forwarding configuration applicable to the downlink time-frequency resource unit is designed to control the forwarding beam generated by the RIS node during passive forwarding to avoid potential interference to the network device receiver and the terminal device receiver.

[0077] That is to say, when the first time-frequency resource unit is an uplink time-frequency resource unit, and the first forwarding configuration is designed so that the RIS node performs passive forwarding based on the first forwarding configuration, the generated forwarding beam needs to avoid the network device that is receiving the communication signal; when the first time-frequency resource unit is a downlink time-frequency resource unit, and the first forwarding configuration is designed so that the RIS node performs passive forwarding based on the first forwarding configuration, the generated forwarding beam needs to avoid the terminal device that is receiving the communication signal; when the first time-frequency resource unit is a flexible time-frequency resource unit, and the first forwarding configuration is designed so that the RIS node performs passive forwarding based on the first forwarding configuration, the generated forwarding beam needs to avoid the terminal device and network device that may be receiving the communication signal.

[0078] Therefore, in an embodiment of the present application, when forwarding a non-target signal on the first time-frequency resource unit, the RIS node adopts a forwarding configuration suitable for the resource type of the first time-frequency resource unit, which is beneficial to reducing interference to a receiver that is receiving a communication signal on the first time-frequency resource unit.

[0079] In other embodiments, a forwarding configuration applicable to a section of time-frequency resource units may be designed. Since the time-frequency resource units are usually scheduled by network devices, the network devices may be aware of the interference objects on this section of time-frequency resource units. Based on this, the network devices may configure a forwarding configuration applicable to this section of time-domain resource units. Furthermore, on a section of time-frequency resource units, RIS nodes may forward non-target signals based on the forwarding configuration, which is beneficial to reducing interference caused by the RIS nodes forwarding non-target signals.

[0080] In some embodiments, the first forwarding configuration related to the state of the RIS node may refer to:

[0081] The first forwarding configuration is a forwarding configuration suitable for the current state of the RIS node.

[0082] That is to say, in the embodiment of the present application, the RIS node can select a corresponding forwarding configuration according to its own state to forward non-target signals, which is helpful to reduce the interference caused by the RIS node forwarding signals.

[0083] In some scenarios, the forwarding behavior of RIS nodes may increase the interference level of the system.

[0084] For example, when the RIS node forwards the target signal based on the forwarding configuration indicated by the network device, an abnormality occurs in the backhaul link between the network device and the RIS node. In this case, since the power of the target signal is relatively low and the interference signal is relatively strong in the incident signal of the RIS node, if the forwarding configuration is still used to forward the target signal, the interference to the communication system will be enhanced, and the signal to interference plus noise ratio (SINR) of the target signal will not be significantly improved.

[0085] For another example, when the MT functional unit of the RIS node is released to the RRC idle state or the RRC inactive state, the network device no longer needs the RIS node to forward, but the forwarding unit of the RIS will still passively forward the incident signal, usually using diffuse forwarding for passive forwarding. This forwarding behavior also increases the interference level of the system.

[0086] Therefore, in the embodiment of the present application, the forwarding configuration may be designed according to the state of the RIS node, which is helpful to reduce the interference caused by the forwarding behavior of the RIS node in different states.

[0087] In some embodiments, a forwarding configuration applicable to one or more of the following states may be designed:

[0088] RIS nodes do not need to forward target signals;

[0089] The RIS node is in an abnormal state;

[0090] The MT functional unit of the RIS node is in the RRC idle state or the RRC inactive state;

[0091] The serving cell of the MT functional unit of the RIS node is not configured with a forwarding configuration for non-target signals.

[0092] In some embodiments, the RIS node does not need to forward the target signal, for example, including but not limited to the RIS node is not configured by the network device to forward the target signal, and / or the RIS node determines not to forward the target signal based on pre-configured conditions. In this case, the forwarding unit of the RIS node is in a closed state.

[0093] Optionally, the RIS node being in an abnormal state can be understood as a state in which the RIS node needs to forward the target signal, but the forwarding of the target signal by the RIS node based on the forwarding configuration for the target signal will increase the strength of the interference signal. For example, when the RIS node needs to forward the target signal, but the backhaul link between the RIS node and the network device is abnormal, the strength of the target signal is weak. If the target signal continues to be forwarded based on the forwarding configuration for the target signal, not only will the SINR of the target signal not be improved, but the interference to the communication system will be increased. For another example, when the RIS node needs to forward the target signal, but the RIS node reselects to a new cell, the forwarding configuration for the target signal indicated by the original serving cell may not be applicable to the reselected new cell. Therefore, continuing to forward the target signal based on the forwarding configuration for the target signal indicated by the original serving cell may increase the interference to the communication system.

[0094] In some embodiments, the RIS node needs to forward the target signal, including but not limited to at least one of the following:

[0095] The MT functional unit of the RIS node is in an RRC connected state. For example, when the MT functional unit of the RIS node is in an RRC connected state, the RIS node is configured to forward a target signal;

[0096] The MT functional unit of the RIS node is in an RRC inactive state or an RRC idle state, and the RIS node is configured to forward a target signal.

[0097] In some embodiments, the RIS node is in an abnormal state, including but not limited to at least one of the following:

[0098] The MT functional unit of the RIS node is in an RRC connected state, and a radio link failure (Radio Link Failure, RLF) occurs in the backhaul link between the network device and the RIS node;

[0099] The MT functional unit of the RIS node is in an RRC connected state, and a beam failure occurs in the backhaul link between the network device and the RIS node;

[0100] The MT functional unit of the RIS node is in an RRC connected state, and the media access control (MAC) of the RIS node receives one or more out of sync indications (OOS) sent by the physical layer of the RIS node, that is, the RIS node and the network device are out of sync;

[0101] The MT functional unit of the RIS node is in an RRC inactive state or an RRC idle state, the RIS node is configured to forward a target signal, and the link quality of the backhaul link between the network device and the RIS node is lower than or equal to a preset threshold;

[0102] The MT functional unit of the RIS node is in an RRC inactive state or an RRC idle state, the RIS node is configured to forward a target signal, and the MT functional unit of the RIS node reselects a cell different from an original serving cell of the MT functional unit of the RIS.

[0103] In some embodiments, the MT functional unit of the RIS node is in an RRC connected state, and an RLF or beam failure occurs in the backhaul link between the network device and the RIS node, or the RIS node and the network device lose synchronization. It can be understood that the RIS node performing signal forwarding at this time cannot improve the SINR of the target signal, but will increase the interference to the communication system. Therefore, in this case, the RIS node can forward non-target signals based on the forwarding configuration for non-target signals, which is beneficial to reduce the interference caused by the RIS node performing signal forwarding.

[0104] In some embodiments, the MT functional unit of the RIS node is in an RRC inactive state or an RRC idle state, the RIS node is configured to forward the target signal, and the link quality of the backhaul link between the network device and the RIS node is lower than or equal to a preset threshold. It can be understood that the RIS node performing signal forwarding at this time cannot improve the SINR of the target signal, but will increase the interference to the communication system. Therefore, in this case, the RIS node can be used for the forwarding configuration of non-target signals to forward non-target signals, which is beneficial to reduce the interference caused by the RIS node performing signal forwarding.

[0105] In some embodiments, the first forwarding configuration includes one or more of the following:

[0106] A forwarding parameter indication, used to indicate a forwarding parameter used by the RIS node to forward a signal;

[0107] A time-frequency resource unit indication, used to indicate the time-frequency resource unit to which the forwarding parameter is applicable;

[0108] A link direction indication, used to indicate the link direction to which the forwarding parameter is applicable;

[0109] A resource type indication, used to indicate the resource type of the time-frequency resource unit to which the forwarding parameter is applicable;

[0110] An applicable status indication, used to indicate the status of the RIS node to which the forwarding parameter is applicable;

[0111] A priority indication, used to indicate the priority of the first forwarding configuration.

[0112] In some embodiments, the time-frequency resource unit indication may indicate one time-frequency resource unit, or may also indicate a group of time-frequency resource units, which is not limited in the present application.

[0113] In some embodiments, the link direction indication may be used to indicate an uplink direction and / or a downlink direction.

[0114] In some embodiments, the resource type indication may be used to indicate one or more of an uplink time-frequency resource unit, a downlink time-frequency resource unit, and a flexible time-frequency resource unit.

[0115] In some embodiments, the forwarding parameter indication includes a precoding matrix indication and / or a beam indication, wherein the precoding matrix indication is used to indicate the precoding matrix used by the RIS node for signal forwarding, and the beam indication is used to indicate the beam used by the RIS node for signal forwarding.

[0116] In some embodiments of the present application, the S301 includes:

[0117] When the RIS node learns the first forwarding configuration and does not receive other forwarding configurations applicable to the first time-frequency resource unit before the first time-frequency resource unit, the non-target signal is forwarded based on the first forwarding configuration.

[0118] For example, the network device pre-configures a first forwarding configuration for the RIS node, and the first forwarding configuration is applicable to the first time-frequency resource unit. If, before the first time-frequency resource unit, the network device provides another forwarding configuration applicable to the first time-frequency resource unit, the RIS node forwards non-target signals based on the other forwarding configuration. Alternatively, if, before the first time-frequency resource unit, the network device does not provide another forwarding configuration applicable to the first time-frequency resource unit, the RIS node forwards non-target signals based on the first forwarding configuration.

[0119] In some embodiments, the applicable state indication is used to indicate that the forwarding parameter is used in one or more of the following states:

[0120] The RIS node does not need to forward the target signal;

[0121] The RIS node is in an abnormal state;

[0122] The MT functional unit of the RIS node is in an RRC idle state or an RRC inactive state;

[0123] The service cell of the MT functional unit of the RIS node is not configured with a forwarding configuration for non-target signals.

[0124] That is, the forwarding parameter may be a forwarding parameter applicable to the above one or more states.

[0125] In some embodiments, the priority indication is used to indicate the priority of the first forwarding configuration, and the RIS node may select a forwarding configuration to be preferentially used on the first time-frequency resource unit according to the priority of the forwarding configuration. For example, when there are multiple forwarding configurations that are all applicable to the first time-frequency resource unit, the RIS node may select a forwarding configuration with a high priority to forward non-target signals.

[0126] In some embodiments of the present application, the S301 includes:

[0127] When the RIS node learns the first forwarding configuration and does not receive a forwarding configuration with a priority higher than the first priority before the first time-frequency resource unit, the non-target signal is forwarded based on the first forwarding configuration, and the first priority is the priority of the first forwarding configuration.

[0128] For example, the network device pre-configures a first forwarding configuration for the RIS node, and the first forwarding configuration is applicable to the first time-frequency resource unit. If before the first time-frequency resource unit, the network device provides a second forwarding configuration, and the second forwarding configuration is also applicable to the first time-frequency resource unit, if the priority of the second forwarding configuration is higher than the priority of the first forwarding configuration, then on the first time-frequency resource unit, the RIS node forwards non-target signals based on the second forwarding configuration; or, if the priority of the second forwarding configuration is lower than the priority of the first forwarding configuration, then on the first time-frequency resource unit, the RIS node forwards non-target signals based on the first forwarding configuration.

[0129] In some embodiments, the first forwarding configuration is a periodic or semi-static forwarding configuration, or a dynamic forwarding configuration. Optionally, the periodic or semi-static forwarding configuration can be considered a low-priority forwarding configuration, and the dynamic forwarding configuration can be considered a high-priority forwarding configuration.

[0130] In some embodiments, when the first forwarding configuration is a periodic or semi-static forwarding configuration, the first forwarding configuration further includes one or more of the following parameters:

[0131] period, a starting position offset within a period, and an indication of a time-frequency resource unit within a period.

[0132] The period may refer to the period of the time-frequency resource unit to which the first forwarding configuration is applicable.

[0133] The starting position offset within a period may refer to the starting position offset within a period of the time-frequency resource unit to which the first forwarding configuration is applicable.

[0134] The time-frequency resource unit indication within a period is used to indicate the time-frequency resource unit applicable to the first forwarding configuration within a period.

[0135] That is to say, in the time domain, the time-frequency resource units applicable to the first forwarding configuration are distributed according to a specific pattern.

[0136] Figure 4 A diagram of a time-frequency resource unit applicable to a first forwarding device is shown. For example, the period of the time-frequency resource unit applicable to the first forwarding configuration may be 5 time slots, and the first forwarding configuration is applicable to the first 3 time slots within a period.

[0137] In some embodiments, the method 30 further includes:

[0138] The RIS node selects a first forwarding configuration from a set of candidate forwarding configurations according to a resource type of the first time-frequency resource unit, where the candidate forwarding configurations include forwarding configurations applicable to time-frequency resource units of at least one resource type.

[0139] For example, the first forwarding configuration may be a forwarding configuration of a resource type applicable to the first time-frequency resource unit among the candidate forwarding configurations.

[0140] In some specific implementations, when the first time-frequency resource unit is an uplink time-frequency resource unit, the RIS node determines a forwarding configuration applicable to the uplink time-frequency resource unit in the candidate forwarding configuration set as the first forwarding configuration; or

[0141] When the first time-frequency resource unit is a downlink time-frequency resource unit, the RIS node determines a forwarding configuration in the candidate forwarding configuration set that is applicable to the downlink time-frequency resource unit as the first forwarding configuration; or

[0142] When the first time-frequency resource unit is a flexible time-frequency resource unit and the network device configures the first time-frequency resource unit to be in an uplink state, the RIS node determines the forwarding configuration applicable to the uplink time-frequency resource unit in the candidate forwarding configuration set as the first forwarding configuration; or

[0143] When the first time-frequency resource unit is a flexible time-frequency resource unit and the network device configures the first time-frequency resource unit to be in a downlink state, the RIS node determines a forwarding configuration in the candidate forwarding configuration set that is applicable to the downlink time-frequency resource unit as the first forwarding configuration; or

[0144] When the first time-frequency resource unit is a flexible time-frequency resource unit and the network device has not configured the uplink and downlink status of the first time-frequency resource unit, the RIS node determines the forwarding configuration applicable to the flexible time-frequency resource unit in the candidate forwarding configuration set as the first forwarding configuration.

[0145] In some embodiments, the candidate forwarding configuration set is configured by the network device, or is predefined. For example, the network device may configure the candidate forwarding configuration set to the RIS node through a system message, RRC signaling, or other downlink signaling.

[0146] Therefore, in the embodiment of the present application, a forwarding configuration applicable to time-frequency resource units of different resource types can be designed. The forwarding configuration applicable to time-frequency resource units of different resource types is used to control interference to different potential interference objects, and compared with the diffuse reflection configuration adopted in time-frequency resource units of all resource types, the optimal interference control can be achieved.

[0147] In some embodiments, the network device may be an access network device, such as a base station connected to a RIS node, or it may be a core network device. The core network device may include but is not limited to at least one of the following: OAM, MME, AMF, SMF, UPF, PCF, PCRF, EASDF, UDM, UDR, HSS, CNC, NRF, NEF, L-NEF, BSF, AF, or it may be other core network functions introduced as the standard evolves, which is not limited in this application.

[0148] In some embodiments, in the candidate forwarding configuration set, time-frequency resource units of different resource types correspond to different forwarding configurations. For example, the candidate forwarding configuration set includes multiple forwarding configuration sets, each of which is applicable to time-frequency resource units of one resource type. Optionally, a time-frequency resource unit of one resource type may correspond to one forwarding configuration, or may correspond to multiple forwarding configurations, which is not limited in this application. Optionally, the number of forwarding configurations corresponding to time-frequency resource units of different resource types may be the same, or may be different.

[0149] For example, in Figure 5 In the example of , the candidate forwarding configuration set may include forwarding configuration 1, forwarding configuration 2 and forwarding configuration 3, wherein forwarding configuration 1 is applicable to uplink time-frequency resource units (e.g., uplink time slots or uplink symbols), forwarding configuration 2 is applicable to downlink time-frequency resource units (e.g., downlink time slots or downlink symbols), and forwarding configuration 3 is applicable to flexible time-frequency resource units (e.g., flexible time slots or flexible symbols). Optionally, forwarding configuration 1, forwarding configuration 2 and forwarding configuration 3 may be periodic or semi-static forwarding configurations, such as Figure 5 As shown, the period of forwarding configuration 1, forwarding configuration 2 and forwarding configuration 3 can be 5 time slots. In each period, forwarding configuration 1, forwarding configuration 2 and forwarding configuration 3 are applicable to time-frequency resource units of different resource types in the period.

[0150] Optionally, the forwarding configuration 1 can be considered as a default forwarding configuration applicable to the uplink time-frequency resource unit. When the RIS node does not know other forwarding configurations applicable to the uplink time-frequency resource unit, the forwarding configuration 1 is used by default on the uplink time-frequency resource unit to forward non-target signals. For example, when the first time-frequency resource unit is an uplink time-frequency resource unit, the RIS node knows the forwarding configuration 1, and has not obtained other forwarding configurations applicable to the uplink time-frequency resource unit before the first time-frequency resource unit or has not obtained other forwarding configurations with higher priority applicable to the uplink time-frequency resource unit, the RIS node uses the forwarding configuration 1 on the first time-frequency resource unit to forward non-target signals, which is conducive to reducing or avoiding interference with the receiver of the network device.

[0151] Optionally, the forwarding configuration 2 can be considered as a default forwarding configuration applicable to the downlink time-frequency resource unit. When the RIS node does not know other forwarding configurations applicable to the downlink time-frequency resource unit, the forwarding configuration 2 is used by default on the downlink time-frequency resource unit to forward non-target signals. For example, when the first time-frequency resource unit is a downlink time-frequency resource unit, the RIS node learns forwarding configuration 2, and does not obtain other forwarding configurations applicable to the downlink time-frequency resource unit before the first time-frequency resource unit or does not obtain other forwarding configurations with higher priority applicable to the downlink time-frequency resource unit, the RIS node uses forwarding configuration 2 on the first time-frequency resource unit to forward non-target signals, which is conducive to reducing or avoiding interference with the receiver of the terminal device.

[0152] Optionally, the forwarding configuration 3 can be considered as a default forwarding configuration applicable to the flexible time-frequency resource unit. When the RIS node does not know other forwarding configurations applicable to the flexible time-frequency resource unit, the forwarding configuration 3 is used by default on the flexible time-frequency resource unit to forward non-target signals. For example, when the first time-frequency resource unit is a flexible time-frequency resource unit, the RIS node learns forwarding configuration 3, and has not obtained other forwarding configurations applicable to the flexible time-frequency resource unit before the first time-frequency resource unit or has not obtained other forwarding configurations with higher priority applicable to the flexible time-frequency resource unit, the RIS node uses forwarding configuration 3 on the first time-frequency resource unit to forward non-target signals, which is conducive to reducing or avoiding interference with terminal device receivers and network device receivers.

[0153] It should be understood that in the embodiment of the present application, the default forwarding configuration may be predefined, or may be configured by the network device. The default forwarding configuration may be the latest or highest priority forwarding configuration saved on the RIS node. For example, forwarding configuration 1 may be predefined or configured by the network device. The forwarding configuration 1 may be the latest or highest priority forwarding configuration applicable to the uplink time-frequency resource unit saved on the RIS node. When the network device is not configured with a new forwarding configuration or a higher priority forwarding configuration applicable to the uplink time-frequency resource unit, the RIS node continues to use the forwarding configuration 1 by default to forward non-target signals on the uplink time-frequency resource unit.

[0154] In some embodiments, the priority of the predefined forwarding configuration is lower than the priority of the forwarding configuration indicated by the network device, that is, the RIS node preferentially uses the forwarding configuration indicated by the network device to forward non-target signals.

[0155] In some embodiments, in the candidate forwarding configuration set, time-frequency resource units of at least one resource type correspond to the same forwarding configuration, or a forwarding configuration can be applicable to time-frequency resource units of at least one resource type. For example, the forwarding configuration includes forwarding parameters for time-frequency resource units of each resource type in the time-frequency resource units of at least one resource type.

[0156] In some embodiments, in the candidate forwarding configuration set, time-frequency resource units of multiple resource types correspond to the same forwarding configuration, and the time-frequency resource units of multiple resource types correspond to the same forwarding configuration, which may include:

[0157] The uplink time-frequency resource unit and the flexible time-frequency resource unit correspond to the same forwarding configuration; and / or

[0158] The downlink time-frequency resource unit and the flexible time-frequency resource unit correspond to the same forwarding configuration; and / or

[0159] The uplink time-frequency resource unit and the downlink time-frequency resource unit correspond to the same forwarding configuration.

[0160] For example, the uplink time-frequency resource unit and the flexible time-frequency resource unit correspond to the same forwarding configuration, which may refer to:

[0161] The forwarding configuration includes forwarding parameters (such as precoding matrix or beam parameters) applicable to uplink time-frequency resource units and forwarding parameters (such as precoding matrix or beam parameters) applicable to flexible time-frequency resource units.

[0162] For example, the downlink time-frequency resource unit and the flexible time-frequency resource unit correspond to the same forwarding configuration, which may refer to:

[0163] The forwarding configuration includes forwarding parameters (such as precoding matrix or beam parameters) applicable to downlink time-frequency resource units and forwarding parameters (such as precoding matrix or beam parameters) applicable to flexible time-frequency resource units.

[0164] For example, the uplink time-frequency resource unit and the downlink time-frequency resource unit correspond to the same forwarding configuration, which may refer to:

[0165] The forwarding configuration includes forwarding parameters (such as precoding matrix or beam parameters) applicable to uplink time-frequency resource units and forwarding parameters (such as precoding matrix or beam parameters) applicable to downlink time-frequency resource units.

[0166] Combination Figure 6For example, the default forwarding configuration for non-target signal forwarding includes forwarding parameter 1, forwarding parameter 2 and forwarding parameter 3, wherein forwarding parameter 1 is applicable to uplink time-frequency resource units, forwarding parameter 2 is applicable to downlink time-frequency resource units, and forwarding parameter 3 is applicable to flexible time-frequency resource units. Optionally, the default forwarding configuration is a periodic or semi-static forwarding configuration, such as Figure 6 As shown, the period of the default forwarding configuration may be 5 time slots, and in each period, forwarding parameter 1, forwarding parameter 2, and forwarding parameter 3 in the default forwarding configuration are applicable to time-frequency resource units of different resource types in the period. The forwarding parameters may include precoding matrices and / or beam parameters.

[0167] It should be noted that Figures 4 to 6 Taking the time slot as an example, the time length of the time-frequency resource unit applicable to the forwarding configuration can also be other time lengths, such as symbols, subframes, etc., and the present application is not limited to this.

[0168] In some embodiments, the RIS node includes multiple forwarding ports, and the candidate forwarding configuration set includes forwarding configurations applicable to multiple forwarding ports. In other words, the forwarding configuration can also be per forwarding port granularity. In this case, the first forwarding configuration is a forwarding configuration applicable to the first forwarding port, and the first forwarding port is the forwarding port used by the RIS node to forward non-target signals. Since different forwarding ports of the RIS node correspond to different characteristics, designing corresponding forwarding configurations for different forwarding ports is conducive to reducing interference caused by the RIS node forwarding non-target signals based on different forwarding ports.

[0169] In some specific implementations, the candidate forwarding configuration set includes forwarding configurations applicable to time-frequency resource units of multiple resource types and / or multiple forwarding ports.

[0170] For example, the candidate forwarding configuration set may include a first forwarding configuration group, the first forwarding configuration group includes one or more forwarding configurations, and the forwarding configurations in the first forwarding configuration group are applicable to uplink time-frequency resource units. Further, the forwarding configurations in the first forwarding configuration group may also be forwarding port granularity, for example, the first forwarding configuration group may include forwarding configurations applicable to different forwarding ports of the RIS node. The same is true for downlink time-frequency resource units and flexible time-frequency resource units, which will not be described here for the sake of brevity.

[0171] In some embodiments, the candidate forwarding configuration set may include a forwarding configuration applicable to a specific state of the RIS node, or a forwarding configuration applicable to a specific condition. For example, the network device may configure a forwarding configuration for a specific state or a specific condition for the RIS node, and when the RIS node enters a specific state or meets a specific condition, the forwarding configuration may be used to forward non-target signals.

[0172] Optionally, the specific state or specific condition may include but is not limited to at least one of the following:

[0173] RIS nodes do not need to forward target signals;

[0174] The RIS node is in an abnormal state;

[0175] The MT functional unit of the RIS node is released to the RRC idle state or the RRC inactive state;

[0176] The serving cell of the MT functional unit of the RIS node is not configured with a forwarding configuration for non-target signals.

[0177] It should be understood that in the embodiment of the present application, different states or different conditions of the above-mentioned RIS node may correspond to the same forwarding configuration, or may correspond to different forwarding configurations, and the present application does not limit this.

[0178] Optionally, the candidate forwarding configuration set may include a forwarding configuration applicable to a first state, and the first state includes a forwarding configuration in which a serving cell of the MT functional unit of the RIS node is not configured for a non-target signal.

[0179] For example, when the MT functional unit of the RIS node reselects to a new cell, and the cell is not configured with a forwarding configuration for non-target signals, the RIS node may forward the non-target signals using a forwarding configuration applicable to the first state.

[0180] In some embodiments, the candidate forwarding configuration set may include a forwarding configuration suitable for a second state, where the second state is that the RIS node does not need to forward the target signal.

[0181] Optionally, when the RIS node is in an abnormal state (recorded as the third state), it can also be considered that the RIS node does not need to forward the target signal. In this state, the RIS node can use the forwarding configuration applicable to the second state to forward non-target signals, or the candidate forwarding configuration set can also include a forwarding configuration applicable to the third state, that is, a dedicated forwarding configuration can be designed for the third state. Then, when the RIS node is in an abnormal state, the forwarding configuration applicable to the third state or the forwarding configuration applicable to the second state can be used to forward non-target signals.

[0182] Optionally, when the MT functional unit of the RIS node is released to the RRC idle state or the RRC inactive state, it can also be considered that the RIS node does not need to forward the target signal. In this state, the RIS node can use the forwarding configuration applicable to the second state to forward non-target signals.

[0183] It should be noted that the above forwarding configuration applicable to a specific state or specific condition of a RIS node may also be at the granularity of resource type and / or forwarding port.

[0184] For example, the candidate forwarding configuration set includes a forwarding configuration applicable to the second state, which may include a forwarding configuration applicable to the second state for time-frequency resource units of different resource types, or a forwarding configuration applicable to the second state for time-frequency resource units of forwarding ports.

[0185] For another example, the candidate forwarding configuration set includes a forwarding configuration applicable to the third state, and the forwarding configuration applicable to the third state may include a forwarding configuration for time-frequency resource units of different resource types applicable to the third state, or a forwarding configuration for time-frequency resource units of a forwarding port applicable to the second state.

[0186] For another example, the candidate forwarding configuration set includes a forwarding configuration applicable to the first state, and the forwarding configuration applicable to the first state may include a forwarding configuration applicable to time-frequency resource units of different resource types applicable to the first state, or a forwarding configuration applicable to the first state for time-frequency resource units of forwarding ports.

[0187] In some embodiments of the present application, the S301 includes:

[0188] In one or more of the following states, the RIS node forwards the non-target signal on the first time-frequency resource unit based on the first forwarding configuration:

[0189] RIS nodes do not need to forward target signals;

[0190] The RIS node is in an abnormal state;

[0191] The MT functional unit of the RIS node is released to the RRC idle state or the RRC inactive state;

[0192] The MT functional unit of the RIS node reselects to a first cell, and the first cell is different from an original serving cell of the MT functional unit of the RIS.

[0193] In some embodiments, the RIS node does not need to forward the target signal, for example, including but not limited to the RIS node is not configured by the network device to forward the target signal, and / or the RIS node determines not to forward the target signal based on pre-configured conditions. In this case, the forwarding unit of the RIS node is in a closed state.

[0194] The following describes the method for forwarding non-target signals in the above four scenarios in conjunction with specific embodiments.

[0195] Embodiment 1:

[0196] In this embodiment 1, S301 includes:

[0197] When there is no need to forward the target signal, the RIS node forwards the non-target signal on the first time-frequency resource unit based on the first forwarding configuration.

[0198] Optionally, the first forwarding configuration may be determined based on the resource type of the first time-frequency resource unit. For example, the first forwarding configuration is a forwarding configuration applicable to the resource type of the first time-frequency resource unit. The RIS node selects a suitable forwarding configuration according to the resource type of the first time-frequency resource unit, and further uses the forwarding configuration on the first time-frequency resource unit to forward non-target signals, which is conducive to reducing interference to potential receivers.

[0199] Optionally, the time-frequency resource unit to which the first forwarding configuration applies includes the first time-frequency resource unit.

[0200] Optionally, the first forwarding configuration is a periodic or semi-static forwarding configuration.

[0201] Example 2

[0202] In this embodiment 2, S301 includes:

[0203] When the RIS node is in an abnormal state, the RIS node forwards the non-target signal on the first time-frequency resource unit based on the first forwarding configuration.

[0204] In a specific implementation, when the RIS node is in an abnormal state, the RIS node can stop using the forwarding configuration indicated by the network device (the forwarding configuration for the target signal) to forward the target signal, and use the forwarding configuration for the non-target signal to forward the non-target signal, which can reduce the interference caused by invalid forwarding.

[0205] Optionally, the first forwarding configuration may be determined based on the resource type of the first time-frequency resource unit. For example, the first forwarding configuration is a forwarding configuration applicable to the resource type of the first time-frequency resource unit. The RIS node selects a suitable forwarding configuration according to the resource type of the first time-frequency resource unit, and further uses the forwarding configuration on the first time-frequency resource unit to forward non-target signals, which is conducive to reducing interference to potential receivers.

[0206] Optionally, the time-frequency resource unit to which the first forwarding configuration applies includes the first time-frequency resource unit.

[0207] Optionally, the first forwarding configuration is a forwarding configuration used when the RIS node is in an abnormal state, that is, the first forwarding configuration is a dedicated forwarding configuration for the abnormal state.

[0208] Optionally, the first forwarding configuration is a periodic or semi-static forwarding configuration.

[0209] Example 3

[0210] In this embodiment 3, S301 may include:

[0211] When the MT functional unit of the RIS node is released to the RRC idle state or the RRC inactive state, the RIS node forwards the non-target signal on the first time-frequency resource unit based on the first forwarding configuration.

[0212] In a specific implementation, when the RIS node is not needed to forward the target signal, the MT functional unit of the RIS node can be released to the RRC idle state or the RRC inactive state to reduce the power consumption of the RIS node. In this case, the RIS node uses a first forwarding configuration to forward non-target signals, and the first forwarding configuration is used for passive forwarding when there is no target forwarding signal. Forwarding non-target signals based on the first forwarding configuration can reduce interference to other terminal devices or network devices in the receiving state in the communication system. Optionally, the network device can configure the forwarding configuration used by the forwarding unit of the RIS node when it is in the RRC idle state or the RRC inactive state through system information.

[0213] In some embodiments, when the MT functional unit of the RIS node is in an RRC connected state, the RIS node obtains a first forwarding configuration. Before the MT functional unit of the RIS node is released to an RRC idle state or an RRC inactive state, if the network device has not released the first forwarding configuration, then after the MT functional unit of the RIS node is released to an RRC idle state or an RRC inactive state, the RIS node may forward non-target signals based on the first forwarding configuration.

[0214] Optionally, the first forwarding configuration may be determined based on the resource type of the first time-frequency resource unit. For example, the first forwarding configuration is a forwarding configuration applicable to the resource type of the first time-frequency resource unit. The RIS node selects a suitable forwarding configuration according to the resource type of the first time-frequency resource unit, and further uses the forwarding configuration on the first time-frequency resource unit to forward non-target signals, which is conducive to reducing interference to potential receivers.

[0215] Optionally, the time-frequency resource unit to which the first forwarding configuration applies includes the first time-frequency resource unit.

[0216] Optionally, the first forwarding configuration is a periodic or semi-static forwarding configuration.

[0217] Example 4

[0218] In this embodiment 4, S301 may include:

[0219] When the MT functional unit of the RIS node reselects to a new cell, the RIS node forwards the non-target signal based on the first forwarding configuration on the first time-frequency resource unit.

[0220] Optionally, in this embodiment 4, the first forwarding configuration may be the forwarding configuration of the original serving cell configuration of the MT functional unit of the RIS node. That is, when the MT functional unit of the RIS node reselects to a new cell, the forwarding configuration for non-target signal forwarding configured in the original serving cell may continue to be used to forward non-target signals.

[0221] Optionally, in this embodiment 4, the first forwarding configuration is a forwarding configuration used in a first state, and the first state includes that the service cell of the MT functional unit of the RIS node is not configured with a forwarding configuration for non-target signals.

[0222] For example, when the MT functional unit of the RIS node reselects to the first cell, the first cell does not provide a forwarding configuration for forwarding non-target signals. In this case, the RIS node can forward the non-target signal based on the forwarding configuration applicable to use in the first state. The forwarding configuration used in the first state is pre-configured by a network device, or predefined, for example, provided in advance by a network device, and the network device may be a network device corresponding to a cell where the RIS node has resided.

[0223] In summary, in the embodiment of the present application, on the first time-frequency resource unit, the RIS node can forward non-target signals based on the first forwarding configuration, and the first forwarding configuration is a forwarding configuration for non-target signals, and the first forwarding configuration is related to the resource configuration of the first time-frequency resource unit and / or the state of the RIS node. That is to say, in the embodiment of the present application, the forwarding configuration for non-target signals can be designed based on the resource configuration of the time-frequency resource unit and / or the state of the RIS node. Further, when the RIS node forwards the non-target signal, it can select a suitable forwarding configuration according to the resource configuration of the time-frequency resource and / or the state of the RIS node, which is conducive to reducing the interference caused by the RIS node forwarding the signal.

[0224] In some implementations, the RIS node may select an appropriate forwarding configuration according to the resource type of the time-frequency resource unit, which is helpful to reduce interference to potential receivers on the time-frequency resource unit.

[0225] In other implementations, the RIS node can select an appropriate forwarding configuration based on its own state. For example, when it is in an abnormal state or the RIS-MT functional unit is released to the RRC idle state or the RRC inactive state, the RIS node can stop forwarding the target signal and instead use the forwarding configuration for non-target signals to forward the non-target signal, thereby reducing the interference caused by invalid forwarding.

[0226] Combination of the above Figures 3 to 6 , describes in detail the RIS node side embodiment of the present application, and the following is combined with Figure 7 , the network device side embodiment of the present application is described in detail. It should be understood that the network device side embodiment and the RIS node side embodiment correspond to each other, and similar descriptions can refer to the RIS node side embodiment.

[0227] Figure 7 is a schematic flow chart of a signal forwarding method 70 according to an embodiment of the present application, such as Figure 7 As shown, the method 70 may include at least part of the following contents:

[0228] S701, a network device sends first configuration information to a reconfigurable intelligent surface RIS node, where the first configuration information includes one or more forwarding configurations for forwarding non-target signals, the one or more forwarding configurations are applicable to at least one resource configuration, and / or the one or more forwarding configurations are applicable to a specific state of the RIS node.

[0229] In some embodiments, resource configuration may include resource types, such as uplink time-frequency resource units, downlink time-frequency resource units, and flexible time-frequency resource units.

[0230] In some embodiments, the one or more forwarding configurations are applicable to at least one resource configuration, including:

[0231] The one or more forwarding configurations are applicable to at least one resource type, wherein the at least one resource type includes one or more of the following: an uplink time-frequency resource unit, a downlink time-frequency resource unit, and a flexible time-frequency resource unit.

[0232] That is, the network device can configure the RIS node with forwarding configurations applicable to time-frequency resource units of different resource types. The one or more forwarding configurations can be considered as default forwarding configurations applicable to time-frequency resource units of different resource types.

[0233] In some embodiments, the specific state of the RIS node includes at least one of the following:

[0234] RIS nodes do not need to forward target signals;

[0235] The RIS node is in an abnormal state;

[0236] The MT functional unit of the RIS node is released to the RRC idle state or the RRC inactive state;

[0237] The serving cell of the MT functional unit of the RIS node is not configured with a forwarding configuration for non-target signals.

[0238] The meanings of the above-mentioned states refer to the relevant description in method 30, and for the sake of brevity, they are not repeated here.

[0239] For example, the network device may provide one or more forwarding configurations that are applicable when the RIS node is in an abnormal state.

[0240] For another example, the network device may be suitable for when the MT functional unit of the RIS node is released to the RRC idle state or the RRC inactive state through one or more forwarding configurations.

[0241] For another example, the network device may be configured with one or more forwarding configurations, which is suitable for when the RIS node does not need to forward the target signal.

[0242] In some embodiments, the forwarding configuration includes one or more of the following:

[0243] A forwarding parameter indication, used to indicate a forwarding parameter used by the RIS node to forward a signal;

[0244] A time-frequency resource unit indication, used to indicate the time-frequency resource unit to which the forwarding parameter is applicable;

[0245] A link direction indication, used to indicate the link direction to which the forwarding parameter is applicable;

[0246] A resource type indication, used to indicate the resource type of the time-frequency resource unit to which the forwarding parameter is applicable;

[0247] An applicable status indication, used to indicate the status of the RIS node to which the forwarding parameter is applicable;

[0248] A priority indication, used to indicate the priority of the forwarding configuration;

[0249] In some embodiments, the forwarding parameter indication includes a precoding matrix indication and / or a beam indication, wherein the precoding matrix indication is used to indicate the precoding matrix used by the RIS node for signal forwarding, and the beam indication is used to indicate the beam used by the RIS node for signal forwarding.

[0250] In some embodiments, the applicable state indication is used to indicate that the forwarding parameter is used in one or more of the following states:

[0251] The RIS node does not need to forward the target signal;

[0252] The RIS node is in an abnormal state;

[0253] The terminal MT functional unit of the RIS node is in a radio resource control RRC idle state or an RRC inactive state;

[0254] The service cell of the MT functional unit of the RIS node is not configured with a forwarding configuration for non-target signals.

[0255] In some embodiments, the RIS node is in an abnormal state, including at least one of the following:

[0256] The MT functional unit of the RIS node is in an RRC connected state, and a radio link failure occurs in the backhaul link between the network device and the RIS node;

[0257] The MT functional unit of the RIS node is in an RRC connected state, and a beam failure occurs in the backhaul link between the network device and the RIS node;

[0258] The MT functional unit of the RIS node is in an RRC connected state, and the media access control MAC of the RIS node receives one or more out-of-sync indications OOS sent by the physical layer of the RIS node;

[0259] The MT functional unit of the RIS node is in an RRC inactive state or an RRC idle state, the RIS node is configured to forward a target signal, and the link quality of the backhaul link between the network device and the RIS node is lower than or equal to a preset threshold;

[0260] The MT functional unit of the RIS node is in an RRC inactive state or an RRC idle state, the RIS node is configured to forward a target signal, and the MT functional unit of the RIS node reselects a cell different from an original serving cell of the MT functional unit of the RIS.

[0261] It should be understood that the specific meaning of each parameter in the above forwarding configuration refers to the relevant description in method 30, and for the sake of brevity, it will not be repeated here.

[0262] In some embodiments, the first configuration information is used to configure a candidate forwarding configuration set, and the candidate forwarding configuration set includes forwarding configurations applicable to time-frequency resource units of at least one resource type.

[0263] In some embodiments, in the candidate forwarding configuration set, time-frequency resource units of different resource types correspond to different forwarding configurations; or

[0264] In the candidate forwarding configuration set, the time-frequency resource units of at least one resource type correspond to the same forwarding configuration, wherein the same forwarding configuration includes forwarding parameters of the time-frequency resource units of each resource type in the time-frequency resource units of the at least one resource type.

[0265] In some embodiments, the time-frequency resource unit of the at least one resource type includes time-frequency resource units of multiple resource types, and the time-frequency resource units of the multiple resource types correspond to the same forwarding configuration, including:

[0266] The uplink time-frequency resource unit and the flexible time-frequency resource unit correspond to the same forwarding configuration; and / or

[0267] The downlink time-frequency resource unit and the flexible time-frequency resource unit correspond to the same forwarding configuration; and / or

[0268] The uplink time-frequency resource unit and the downlink time-frequency resource unit correspond to the same forwarding configuration.

[0269] In some embodiments, the RIS node includes a plurality of forwarding ports, and the candidate forwarding configuration set includes forwarding configurations applicable to the plurality of forwarding ports.

[0270] In some embodiments, the forwarding configuration is a periodic or semi-static forwarding configuration.

[0271] In some embodiments, the periodic or semi-static forwarding configuration further includes one or more of the following parameters:

[0272] period, a starting position offset within a period, and an indication of a time-frequency resource unit within a period.

[0273] It should be understood that the specific implementation of the above-mentioned candidate forwarding configuration set refers to the relevant description in method 30, and for the sake of brevity, it will not be repeated here.

[0274] In some embodiments, the non-target signal includes one or more of the following signals:

[0275] An incident signal when the RIS node is not configured by the network device to forward the target signal;

[0276] The RIS node determines an incident signal when not forwarding a target signal according to a preconfigured condition;

[0277] An incident signal after the MT functional unit of the RIS node enters the RRC inactive state;

[0278] An incident signal when the MT functional unit of the RIS node enters the RRC inactive state and does not need to forward the target signal;

[0279] An incident signal after the MT functional unit of the RIS node enters the RRC idle state;

[0280] The MT functional unit of the RIS node enters the RRC idle state and does not need to forward the incident signal when the target signal is forwarded.

[0281] In summary, in the embodiment of the present application, the network device can design a forwarding configuration for non-target signals based on the resource configuration of the time-frequency resource unit and / or the state of the RIS node, and indicate the forwarding configuration to the RIS node. Further, when forwarding non-target signals, the RIS node can select a suitable forwarding configuration according to the resource configuration of the time-frequency resource and / or the state of the RIS node, which is conducive to reducing the interference caused by the RIS node forwarding the signal.

[0282] Combination of the above Figures 3 to 7 , describes in detail the method embodiment of the present application, and the following is combined with Figures 8 to 12 , the device embodiments of the present application are described in detail. It should be understood that the device embodiments and the method embodiments correspond to each other, and similar descriptions can refer to the method embodiments.

[0283] Figure 8 FIG. 8 is a schematic block diagram of a signal forwarding device 80 according to an embodiment of the present application. Figure 8 As shown, the device 80 includes:

[0284] The communication unit 801 is used to forward a non-target signal based on a first forwarding configuration on a first time-frequency resource unit, wherein the first forwarding configuration is a forwarding configuration for non-target signals, and the first forwarding configuration is related to the resource configuration of the first time-frequency resource unit and / or the state of the device 80.

[0285] In some embodiments, the first forwarding configuration is related to the resource configuration of the first time-frequency resource unit and includes:

[0286] The resource type to which the first forwarding configuration is applicable includes the resource type of the first time-frequency resource unit; and / or,

[0287] The time-frequency resource unit to which the first forwarding configuration is applicable includes the first time-frequency resource unit.

[0288] In some embodiments, the resource type of the first time-frequency resource unit is one of the following:

[0289] Uplink time-frequency resource unit, downlink time-frequency resource unit, flexible time-frequency resource unit.

[0290] In some embodiments, the first forwarding configuration includes one or more of the following:

[0291] A forwarding parameter indication, used to indicate a forwarding parameter used by the device 80 to forward a signal;

[0292] A time-frequency resource unit indication, used to indicate the time-frequency resource unit to which the forwarding parameter is applicable;

[0293] A link direction indication, used to indicate the link direction to which the forwarding parameter is applicable;

[0294] A resource type indication, used to indicate the resource type of the time-frequency resource unit to which the forwarding parameter is applicable;

[0295] An applicable status indication, used to indicate the status of the RIS node to which the forwarding parameter is applicable;

[0296] A priority indication, used to indicate the priority of the first forwarding configuration;

[0297] The forwarding parameter indication includes a precoding matrix indication and / or a beam indication, wherein the precoding matrix indication is used to indicate the precoding matrix used by the device 80 for signal forwarding, and the beam indication is used to indicate the beam used by the device 80 for signal forwarding.

[0298] In some embodiments, the applicable state indication is used to indicate that the forwarding parameter is used in one or more of the following states:

[0299] The device 80 does not need to forward the target signal;

[0300] The device 80 is in an abnormal state;

[0301] The terminal MT functional unit of the device 80 is in a radio resource control RRC idle state or an RRC inactive state;

[0302] The serving cell of the MT functional unit of the apparatus 80 is not configured with a forwarding configuration for non-target signals.

[0303] In some embodiments, the device 80 further comprises:

[0304] A processing unit is used to select the first forwarding configuration from a set of candidate forwarding configurations according to the resource type of the first time-frequency resource unit, wherein the candidate forwarding configurations include forwarding configurations applicable to time-frequency resource units of at least one resource type, and the set of candidate forwarding configurations is configured by a network device or is predefined.

[0305] In some embodiments, in the candidate forwarding configuration set, time-frequency resource units of different resource types correspond to different forwarding configurations; or

[0306] In the candidate forwarding configuration set, the time-frequency resource units of at least one resource type correspond to the same forwarding configuration, wherein the same forwarding configuration includes forwarding parameters of the time-frequency resource units of each resource type in the time-frequency resource units of the at least one resource type.

[0307] In some embodiments, the time-frequency resource unit of the at least one resource type includes time-frequency resource units of multiple resource types, and the time-frequency resource units of the multiple resource types correspond to the same forwarding configuration, including:

[0308] The uplink time-frequency resource unit and the flexible time-frequency resource unit correspond to the same forwarding configuration; and / or

[0309] The downlink time-frequency resource unit and the flexible time-frequency resource unit correspond to the same forwarding configuration; and / or

[0310] The uplink time-frequency resource unit and the downlink time-frequency resource unit correspond to the same forwarding configuration.

[0311] In some embodiments, the processing unit is specifically configured to:

[0312] In a case where the first time-frequency resource unit is an uplink time-frequency resource unit, determining a forwarding configuration in the candidate forwarding configuration set that is applicable to the uplink time-frequency resource unit as the first forwarding configuration; or

[0313] In a case where the first time-frequency resource unit is a downlink time-frequency resource unit, determining a forwarding configuration in the candidate forwarding configuration set that is applicable to the downlink time-frequency resource unit as the first forwarding configuration; or

[0314] When the first time-frequency resource unit is a flexible time-frequency resource unit and the network device configures the first time-frequency resource unit to be in an uplink state, determining that the forwarding configuration applicable to the uplink time-frequency resource unit in the candidate forwarding configuration set is the first forwarding configuration; or

[0315] When the first time-frequency resource unit is a flexible time-frequency resource unit and the network device configures the first time-frequency resource unit to be in a downlink state, determining the forwarding configuration applicable to the downlink time-frequency resource unit in the candidate forwarding configuration set as the first forwarding configuration; or

[0316] When the first time-frequency resource unit is a flexible time-frequency resource unit and the network device has not configured the uplink and downlink states of the first time-frequency resource unit, the forwarding configuration applicable to the flexible time-frequency resource unit in the candidate forwarding configuration set is determined as the first forwarding configuration.

[0317] In some embodiments, the device 80 includes multiple forwarding ports, and the candidate forwarding configuration set includes forwarding configurations applicable to the multiple forwarding ports. The first forwarding configuration is a forwarding configuration applicable to a first forwarding port, and the first forwarding port is the forwarding port used by the device 80 for non-target signal forwarding.

[0318] In some embodiments, the communication unit 801 is further configured to:

[0319] When the device 80 learns the first forwarding configuration and has not received other forwarding configurations applicable to the first time-frequency resource unit before the first time-frequency resource unit, the non-target signal is forwarded based on the first forwarding configuration.

[0320] In some embodiments, the first forwarding configuration is a periodic or semi-static forwarding configuration.

[0321] In some embodiments, the first forwarding configuration further includes one or more of the following parameters:

[0322] period, a starting position offset within a period, and an indication of a time-frequency resource unit within a period.

[0323] In some embodiments, the communication unit 801 is further configured to:

[0324] When the device 80 learns the first forwarding configuration and has not received a forwarding configuration with a priority higher than the first priority before the first time-frequency resource unit, the non-target signal is forwarded based on the first forwarding configuration, and the first priority is the priority of the first forwarding configuration.

[0325] In some embodiments, the communication unit 801 is further configured to:

[0326] When one or more of the following conditions are met, the non-target signal is forwarded on the first time-frequency resource unit based on the first forwarding configuration:

[0327] The device 80 does not need to forward the target signal;

[0328] The device 80 is in an abnormal state;

[0329] The MT functional unit of the device 80 is released to the RRC idle state or the RRC inactive state;

[0330] The MT functional unit of the device 80 reselects to a first cell, and the first cell is different from the original serving cell of the MT functional unit of the RIS.

[0331] In some embodiments, the device 80 is in an abnormal state, including at least one of the following:

[0332] The MT functional unit of the device 80 is in an RRC connected state, and a radio link failure occurs in the backhaul link between the network device and the device 80;

[0333] The MT functional unit of the device 80 is in an RRC connected state, and a beam failure occurs in the backhaul link between the network device and the device 80;

[0334] The MT functional unit of the device 80 is in an RRC connected state, and the media access control MAC of the device 80 receives one or more out-of-sync indications OOS sent by the physical layer of the device 80;

[0335] The MT functional unit of the device 80 is in an RRC inactive state or an RRC idle state, the device 80 is configured to forward a target signal, and the link quality of the backhaul link between the network device and the device 80 is lower than or equal to a preset threshold;

[0336] The MT functional unit of the device 80 is in an RRC inactive state or an RRC idle state, the device 80 is configured to forward a target signal, and the MT functional unit of the device 80 reselects to a cell different from the original serving cell of the MT functional unit of the RIS.

[0337] In some embodiments, when the device 80 is in an abnormal state, the first forwarding configuration is a forwarding configuration determined according to the first time-frequency resource unit, or the first forwarding configuration is a forwarding configuration used for the abnormal state.

[0338] In some embodiments, when the MT functional unit of the device 80 is released to the RRC idle state or the RRC inactive state, the first forwarding configuration is obtained when the MT functional unit of the device 80 is in the RRC connected state;

[0339] The communication unit 801 is also used for:

[0340] When the MT functional unit of the device 80 is released to the RRC idle state or the RRC inactive state, if the network device does not release the first forwarding configuration, the non-target signal is forwarded on the first time-frequency resource unit based on the first forwarding configuration.

[0341] In some embodiments, when the MT functional unit of the device 80 is reselected to the first cell, the first forwarding configuration is the forwarding configuration of the original service cell configuration of the MT functional unit of the device 80, or the first forwarding configuration is the forwarding configuration used in the first state, and the first state includes that the service cell of the MT functional unit of the device 80 is not configured for the forwarding configuration of non-target signals.

[0342] In some embodiments, the non-target signal includes one or more of the following signals:

[0343] The incident signal when the device 80 is not configured by the network device to forward the target signal;

[0344] The device 80 determines the incident signal when the target signal is not forwarded according to the preconfigured conditions;

[0345] An incident signal after the MT functional unit of the device 80 enters the RRC inactive state;

[0346] The incident signal when the MT functional unit of the device 80 enters the RRC inactive state and does not need to forward the target signal;

[0347] An incident signal after the MT functional unit of the device 80 enters the RRC idle state;

[0348] After the MT functional unit of the device 80 enters the RRC idle state, there is no need to forward the incident signal when the target signal is forwarded.

[0349] Optionally, in some embodiments, the communication unit may be a communication interface or a transceiver, or an input / output interface of a communication chip or a system on chip. The processing unit may be one or more processors.

[0350] It should be understood that the device 800 according to the embodiment of the present application may correspond to the RIS node in the method embodiment of the present application, and the above and other operations and / or functions of each unit in the device 800 are respectively to implement Figures 3 to 7 The corresponding process of the RIS node in the method embodiment shown in is not repeated here for the sake of brevity.

[0351] Fig. 9 FIG. 8 is a schematic block diagram of a signal forwarding device 90 according to an embodiment of the present application. Fig. 9 As shown, the device 90 comprises:

[0352] The communication unit 901 is used to send first configuration information to a reconfigurable intelligent surface RIS node, where the first configuration information includes one or more forwarding configurations for forwarding non-target signals, where the one or more forwarding configurations are applicable to at least one resource configuration, and / or the one or more forwarding configurations are applicable to a specific state of the RIS node.

[0353] In some embodiments, the one or more forwarding configurations are applicable to at least one resource configuration, including the one or more forwarding configurations being applicable to at least one resource type, wherein the at least one resource type includes one or more of the following:

[0354] Uplink time-frequency resource unit, downlink time-frequency resource unit, flexible time-frequency resource unit.

[0355] In some embodiments, the forwarding configuration includes one or more of the following:

[0356] A forwarding parameter indication, used to indicate a forwarding parameter used by the RIS node to forward a signal;

[0357] A time-frequency resource unit indication, used to indicate the time-frequency resource unit to which the forwarding parameter is applicable;

[0358] A link direction indication, used to indicate the link direction to which the forwarding parameter is applicable;

[0359] A resource type indication, used to indicate the resource type of the time-frequency resource unit to which the forwarding parameter is applicable;

[0360] An applicable status indication, used to indicate the status of the RIS node to which the forwarding parameter is applicable;

[0361] A priority indication, used to indicate the priority of the forwarding configuration;

[0362] The forwarding parameter indication includes a precoding matrix indication and / or a beam indication, wherein the precoding matrix indication is used to indicate the precoding matrix used by the RIS node for signal forwarding, and the beam indication is used to indicate the beam used by the RIS node for signal forwarding.

[0363] In some embodiments, the applicable state indication is used to indicate that the forwarding parameter is used in one or more of the following states:

[0364] The RIS node does not need to forward the target signal;

[0365] The RIS node is in an abnormal state;

[0366] The terminal MT functional unit of the RIS node is in a radio resource control RRC idle state or an RRC inactive state;

[0367] The service cell of the MT functional unit of the RIS node is not configured with a forwarding configuration for non-target signals.

[0368] In some embodiments, the RIS node is in an abnormal state, including at least one of the following:

[0369] The MT functional unit of the RIS node is in an RRC connected state, and a radio link failure occurs in the backhaul link between the network device and the RIS node;

[0370] The MT functional unit of the RIS node is in an RRC connected state, and a beam failure occurs in the backhaul link between the network device and the RIS node;

[0371] The MT functional unit of the RIS node is in an RRC connected state, and the media access control MAC of the RIS node receives one or more out-of-sync indications OOS sent by the physical layer of the RIS node;

[0372] The MT functional unit of the RIS node is in an RRC inactive state or an RRC idle state, the RIS node is configured to forward a target signal, and the link quality of the backhaul link between the network device and the RIS node is lower than or equal to a preset threshold;

[0373] The MT functional unit of the RIS node is in an RRC inactive state or an RRC idle state, the RIS node is configured to forward a target signal, and the MT functional unit of the RIS node reselects a cell different from an original serving cell of the MT functional unit of the RIS.

[0374] In some embodiments, the first configuration information is used to configure a candidate forwarding configuration set, and the candidate forwarding configuration set includes forwarding configurations applicable to time-frequency resource units of at least one resource type.

[0375] In some embodiments, in the candidate forwarding configuration set, time-frequency resource units of different resource types correspond to different forwarding configurations; or

[0376] In the candidate forwarding configuration set, the time-frequency resource units of at least one resource type correspond to the same forwarding configuration, wherein the same forwarding configuration includes forwarding parameters of the time-frequency resource units of each resource type in the time-frequency resource units of the at least one resource type.

[0377] In some embodiments, the time-frequency resource unit of the at least one resource type includes time-frequency resource units of multiple resource types, and the time-frequency resource units of the multiple resource types correspond to the same forwarding configuration, including:

[0378] The uplink time-frequency resource unit and the flexible time-frequency resource unit correspond to the same forwarding configuration; and / or

[0379] The downlink time-frequency resource unit and the flexible time-frequency resource unit correspond to the same forwarding configuration; and / or

[0380] The uplink time-frequency resource unit and the downlink time-frequency resource unit correspond to the same forwarding configuration.

[0381] In some embodiments, the RIS node includes a plurality of forwarding ports, and the candidate forwarding configuration set includes forwarding configurations applicable to the plurality of forwarding ports.

[0382] In some embodiments, the forwarding configuration is a periodic or semi-static forwarding configuration.

[0383] In some embodiments, the periodic or semi-static forwarding configuration further includes one or more of the following parameters:

[0384] period, a starting position offset within a period, and an indication of a time-frequency resource unit within a period.

[0385] In some embodiments, the non-target signal includes one or more of the following signals:

[0386] An incident signal when the RIS node is not configured by the network device to forward the target signal;

[0387] The RIS node determines an incident signal when not forwarding a target signal according to a preconfigured condition;

[0388] An incident signal after the MT functional unit of the RIS node enters the RRC inactive state;

[0389] An incident signal when the MT functional unit of the RIS node enters the RRC inactive state and does not need to forward the target signal;

[0390] An incident signal after the MT functional unit of the RIS node enters the RRC idle state;

[0391] The MT functional unit of the RIS node enters the RRC idle state and does not need to forward the incident signal when the target signal is forwarded.

[0392] Optionally, in some embodiments, the communication unit may be a communication interface or a transceiver, or an input / output interface of a communication chip or a system on chip.

[0393] It should be understood that the signal forwarding device 90 according to the embodiment of the present application may correspond to the network device in the method embodiment of the present application, and the above and other operations and / or functions of each unit in the device 90 are respectively to implement Figures 3 to 7For the sake of brevity, the corresponding processes of the network device in the method embodiment shown in FIG. 1 are not repeated here.

[0394] Fig.10 It is a schematic structural diagram of a communication device 1000 provided in an embodiment of the present application. Fig.10 The communication device 1000 shown includes a processor 1010, and the processor 1010 can call and run a computer program from a memory to implement the method in the embodiment of the present application.

[0395] In some embodiments, Fig.10 As shown, the communication device 1000 may further include a memory 1020. The processor 1010 may call and run a computer program from the memory 1020 to implement the method in the embodiment of the present application.

[0396] The memory 1020 may be a separate device independent of the processor 1010 , or may be integrated into the processor 1010 .

[0397] In some embodiments, Fig.10 As shown, the communication device 1000 may further include a transceiver 1030, and the processor 1010 may control the transceiver 1030 to communicate with other devices, specifically, may send information or data to other devices, or receive information or data sent by other devices.

[0398] The transceiver 1030 may include a transmitter and a receiver. The transceiver 1030 may further include an antenna, and the number of antennas may be one or more.

[0399] In some embodiments, the transceiver 1030 may implement the function of a communication unit in a RIS node, which will not be described in detail here for the sake of brevity.

[0400] In some embodiments, the processor 1010 may implement the functions of a processing unit in a RIS node, which will not be described in detail for the sake of brevity.

[0401] In some embodiments, the transceiver 1030 may implement the function of a communication unit in a network device, which will not be described in detail here for the sake of brevity.

[0402] In some embodiments, the communication device 1000 may specifically be a RIS node in the embodiments of the present application, and the communication device 1000 may implement the corresponding processes implemented by the RIS node in the various methods in the embodiments of the present application, which will not be described in detail for the sake of brevity.

[0403] In some embodiments, the communication device 1000 may specifically be a network device of an embodiment of the present application, and the communication device 1000 may implement the corresponding processes implemented by the network device in each method of the embodiment of the present application, which will not be described in detail here for the sake of brevity.

[0404] Fig.11 It is a schematic structural diagram of the chip of an embodiment of the present application. Fig.11 The chip 1100 shown includes a processor 1110, which can call and run a computer program from a memory to implement the method in the embodiment of the present application.

[0405] In some embodiments, Fig.11 As shown, the chip 1100 may further include a memory 1120. The processor 1310 may call and run a computer program from the memory 1120 to implement the method in the embodiment of the present application.

[0406] The memory 1120 may be a separate device independent of the processor 1110 , or may be integrated into the processor 1110 .

[0407] In some embodiments, the chip 1100 may further include an input interface 1130. The processor 1110 may control the input interface 1130 to communicate with other devices or chips, and specifically, may obtain information or data sent by other devices or chips. Optionally, the processor 1110 may be located inside or outside the chip.

[0408] In some embodiments, the chip 1100 may further include an output interface 1140. The processor 1110 may control the output interface 1140 to communicate with other devices or chips, and specifically, may output information or data to other devices or chips. Optionally, the processor 1110 may be located inside or outside the chip.

[0409] In some embodiments, input interface 1130 and output interface 1140 may implement the functionality of a communication unit in a RIS node.

[0410] In some embodiments, processor 1110 may implement the functionality of a processing unit in a RIS node.

[0411] In some embodiments, the input interface 1130 and the output interface 1140 may implement the functions of a communication unit in a network device.

[0412] In some embodiments, the chip can be applied to the RIS node in the embodiments of the present application, and the chip can implement the corresponding processes implemented by the RIS node in each method of the embodiments of the present application, which will not be described here for the sake of brevity.

[0413] In some embodiments, the chip can be applied to the network device in the embodiments of the present application, and the chip can implement the corresponding processes implemented by the network device in each method of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0414] In some embodiments, the chip mentioned in the embodiments of the present application may also be a chip, for example, a system-level chip, a system chip, a chip system, or a system-on-chip chip.

[0415] Fig.12 1 is a schematic block diagram of a communication system 1200 provided in an embodiment of the present application. Fig.12 As shown, the communication system 1200 includes a RIS node 1210 and a network device 1220 .

[0416] The RIS node 1210 may be used to implement the corresponding functions implemented by the RIS node in the above method, and the network device 1220 may be used to implement the corresponding functions implemented by the network device in the above method, which will not be described in detail for the sake of brevity.

[0417] It should be understood that the processor of the embodiment of the present application may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method embodiment can be completed by the hardware integrated logic circuit or software instructions in the processor. The above processor can be a general processor, a digital signal processor (Digital Signal Processor, DSP), an application-specific integrated circuit (Application Specific Integrated Circuit, ASIC), a field programmable gate array (Field Programmable Gate Array, FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general processor can be a microprocessor or the processor can also be any conventional processor. The steps of the method disclosed in the embodiment of the present application can be directly embodied as a hardware decoding processor to perform, or the hardware and software modules in the decoding processor are combined and performed. The software module can be located in a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, and other mature storage media in the art. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

[0418] It is understood that the memory in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory. It should be noted that the memory described herein is intended to include but is not limited to these and any other suitable types of memory.

[0419] It should be understood that the above-mentioned memory is exemplary but not restrictive. For example, the memory in the embodiments of the present application may also be static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous link dynamic random access memory (synch link DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DR RAM), etc. That is to say, the memory in the embodiments of the present application is intended to include but not limited to these and any other suitable types of memory.

[0420] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0421] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0422] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0423] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0424] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0425] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. In view of such an understanding, the technical solution of the present application can be embodied in the form of a software product in essence or in other words, the part that contributes to the prior art or the part of the technical solution. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0426] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A signal forwarding method, characterized in that: include: The reconfigurable intelligent surface RIS node forwards a non-target signal based on a first forwarding configuration on a first time-frequency resource unit, wherein the first forwarding configuration is a forwarding configuration for non-target signals, and the first forwarding configuration is related to the resource configuration of the first time-frequency resource unit and / or the state of the RIS node.

2. The method according to claim 1, characterized in that: The first forwarding configuration is related to the resource configuration of the first time-frequency resource unit and includes: The resource type to which the first forwarding configuration is applicable includes the resource type of the first time-frequency resource unit; and / or, The time-frequency resource unit to which the first forwarding configuration is applicable includes the first time-frequency resource unit.

3. The method according to claim 2, characterized in that The resource type of the first time-frequency resource unit is one of the following: Uplink time-frequency resource unit, downlink time-frequency resource unit, flexible time-frequency resource unit.

4. The method according to any one of claims 1 to 3, characterized in that The first forwarding configuration includes one or more of the following: A forwarding parameter indication, used to indicate a forwarding parameter used by the RIS node to forward a signal; A time-frequency resource unit indication, used to indicate the time-frequency resource unit to which the forwarding parameter is applicable; A link direction indication, used to indicate the link direction to which the forwarding parameter is applicable; A resource type indication, used to indicate the resource type of the time-frequency resource unit to which the forwarding parameter is applicable; An applicable status indication, used to indicate the status of the RIS node to which the forwarding parameter is applicable; A priority indication, used to indicate the priority of the first forwarding configuration; The forwarding parameter indication includes a precoding matrix indication and / or a beam indication, wherein the precoding matrix indication is a precoding matrix used by the RIS node to forward non-target signals, and the beam indication is a beam used by the RIS node to forward non-target signals.

5. The method according to claim 4, characterized in that The applicable state indication is used to indicate that the forwarding parameter is used in one or more of the following states: The RIS node does not need to forward the target signal; The RIS node is in an abnormal state; The terminal MT functional unit of the RIS node is in a radio resource control RRC idle state or an RRC inactive state; The service cell of the MT functional unit of the RIS node is not configured with a forwarding configuration for non-target signals.

6. The method according to any one of claims 1 to 5, characterized in that The method further comprises: According to the resource type of the first time-frequency resource unit, the first forwarding configuration is selected from a set of candidate forwarding configurations, the candidate forwarding configurations including forwarding configurations applicable to time-frequency resource units of at least one resource type, and the set of candidate forwarding configurations is configured by a network device or is predefined.

7. The method according to claim 6, characterized in that In the candidate forwarding configuration set, time-frequency resource units of different resource types correspond to different forwarding configurations; or In the candidate forwarding configuration set, the time-frequency resource units of at least one resource type correspond to the same forwarding configuration, wherein the same forwarding configuration includes forwarding parameters of the time-frequency resource units of each resource type in the time-frequency resource units of the at least one resource type.

8. The method according to claim 7, characterized in that The time-frequency resource unit of the at least one resource type includes time-frequency resource units of multiple resource types, and the time-frequency resource units of the multiple resource types correspond to the same forwarding configuration, including: The uplink time-frequency resource unit and the flexible time-frequency resource unit correspond to the same forwarding configuration; and / or The downlink time-frequency resource unit and the flexible time-frequency resource unit correspond to the same forwarding configuration; and / or The uplink time-frequency resource unit and the downlink time-frequency resource unit correspond to the same forwarding configuration.

9. The method according to any one of claims 6 to 8, characterized in that: The selecting the first forwarding configuration from a set of candidate forwarding configurations according to the resource type of the first time-frequency resource unit includes: In a case where the first time-frequency resource unit is an uplink time-frequency resource unit, determining a forwarding configuration in the candidate forwarding configuration set that is applicable to the uplink time-frequency resource unit as the first forwarding configuration; or In a case where the first time-frequency resource unit is a downlink time-frequency resource unit, determining a forwarding configuration in the candidate forwarding configuration set that is applicable to the downlink time-frequency resource unit as the first forwarding configuration; or When the first time-frequency resource unit is a flexible time-frequency resource unit and the network device configures the first time-frequency resource unit to be in an uplink state, determining that the forwarding configuration applicable to the uplink time-frequency resource unit in the candidate forwarding configuration set is the first forwarding configuration; or When the first time-frequency resource unit is a flexible time-frequency resource unit and the network device configures the first time-frequency resource unit to be in a downlink state, determining the forwarding configuration applicable to the downlink time-frequency resource unit in the candidate forwarding configuration set as the first forwarding configuration; or When the first time-frequency resource unit is a flexible time-frequency resource unit and the network device has not configured the uplink and downlink states of the first time-frequency resource unit, the forwarding configuration applicable to the flexible time-frequency resource unit in the candidate forwarding configuration set is determined as the first forwarding configuration.

10. The method according to any one of claims 5 to 9, characterized in that: The RIS node includes multiple forwarding ports, the candidate forwarding configuration set includes forwarding configurations applicable to the multiple forwarding ports, the first forwarding configuration is a forwarding configuration applicable to a first forwarding port, and the first forwarding port is a forwarding port used by the RIS node to forward non-target signals.

11. The method according to any one of claims 1 to 10, characterized in that The reconfigurable intelligent surface RIS node forwards a non-target signal based on a first forwarding configuration on a first time-frequency resource unit, including: When the RIS node learns the first forwarding configuration and has not received other forwarding configurations applicable to the first time-frequency resource unit before the first time-frequency resource unit, the non-target signal is forwarded based on the first forwarding configuration.

12. The method according to any one of claims 1 to 11, characterized in that The first forwarding configuration is a periodic or semi-static forwarding configuration.

13. The method according to claim 12, characterized in that The first forwarding configuration also includes one or more of the following parameters: period, a starting position offset within a period, and an indication of a time-frequency resource unit within a period.

14. The method according to any one of claims 1 to 13, characterized in that: The reconfigurable intelligent surface RIS node forwards a non-target signal based on a first forwarding configuration on a first time-frequency resource unit, including: When the RIS node learns the first forwarding configuration and has not received a forwarding configuration with a priority higher than a first priority before the first time-frequency resource unit, the non-target signal is forwarded based on the first forwarding configuration, and the first priority is the priority of the first forwarding configuration.

15. The method according to any one of claims 1 to 14, characterized in that The reconfigurable intelligent surface RIS node forwards a non-target signal based on a first forwarding configuration on a first time-frequency resource unit, including: In one or more of the following states, the RIS node forwards the non-target signal on the first time-frequency resource unit based on the first forwarding configuration: The RIS node does not need to forward the target signal; The RIS node is in an abnormal state; The MT functional unit of the RIS node is released to the RRC idle state or the RRC inactive state; The MT functional unit of the RIS node reselects to a first cell, and the first cell is different from an original serving cell of the MT functional unit of the RIS.

16. The method according to claim 15, characterized in that The RIS node is in an abnormal state, including at least one of the following: The MT functional unit of the RIS node is in an RRC connected state, and a radio link failure occurs in the backhaul link between the network device and the RIS node; The MT functional unit of the RIS node is in an RRC connected state, and a beam failure occurs in the backhaul link between the network device and the RIS node; The MT functional unit of the RIS node is in an RRC connected state, and the media access control MAC of the RIS node receives one or more out-of-sync indications OOS sent by the physical layer of the RIS node; The MT functional unit of the RIS node is in an RRC inactive state or an RRC idle state, the RIS node is configured to forward a target signal, and the link quality of the backhaul link between the network device and the RIS node is lower than or equal to a preset threshold; The MT functional unit of the RIS node is in an RRC inactive state or an RRC idle state, the RIS node is configured to forward a target signal, and the MT functional unit of the RIS node reselects a cell different from an original serving cell of the MT functional unit of the RIS.

17. The method according to claim 15 or 16, characterized in that In a case where the RIS node is in an abnormal state, the first forwarding configuration is a forwarding configuration determined according to the first time-frequency resource unit, or the first forwarding configuration is a forwarding configuration used for the abnormal state.

18. The method according to claim 15, characterized in that In a case where the MT functional unit of the RIS node is released to an RRC idle state or an RRC inactive state, the first forwarding configuration is acquired when the MT functional unit of the RIS node is in an RRC connected state; The forwarding of the non-target signal based on the first forwarding configuration on the first time-frequency resource unit includes: When the MT functional unit of the RIS node is released to the RRC idle state or the RRC inactive state, if the network device does not release the first forwarding configuration, the RIS node forwards the non-target signal on the first time-frequency resource unit based on the first forwarding configuration.

19. The method according to claim 15, characterized in that In the case where the MT functional unit of the RIS node is reselected to the first cell, the first forwarding configuration is the forwarding configuration of the original serving cell configuration of the MT functional unit of the RIS node, or the first forwarding configuration is the forwarding configuration used in the first state, and the first state includes that the serving cell of the MT functional unit of the RIS node is not configured with a forwarding configuration for non-target signals.

20. The method according to any one of claims 1 to 19, characterized in that The non-target signal includes one or more of the following signals: An incident signal when the RIS node is not configured by the network device to forward the target signal; The RIS node determines an incident signal when not forwarding a target signal according to a preconfigured condition; An incident signal after the MT functional unit of the RIS node enters the RRC inactive state; An incident signal when the MT functional unit of the RIS node enters the RRC inactive state and does not need to forward the target signal; An incident signal after the MT functional unit of the RIS node enters the RRC idle state; The MT functional unit of the RIS node enters the RRC idle state and does not need to forward the incident signal when the target signal is forwarded.

21. A signal forwarding method, characterized in that: include: The network device sends first configuration information to a reconfigurable intelligent surface (RIS) node, wherein the first configuration information includes one or more forwarding configurations for non-target signal forwarding, wherein the one or more forwarding configurations are applicable to at least one resource configuration, and / or the one or more forwarding configurations are applicable to a specific state of the RIS node.

22. The method according to claim 21, characterized in that The at least one resource configuration includes: at least one resource type, wherein the at least one resource type includes at least one of the following: Uplink time-frequency resource unit, downlink time-frequency resource unit, flexible time-frequency resource unit.

23. The method according to claim 21 or 22, characterized in that The forwarding configuration includes one or more of the following: A forwarding parameter indication, used to indicate a forwarding parameter used by the RIS node to forward a signal; A time-frequency resource unit indication, used to indicate the time-frequency resource unit to which the forwarding parameter is applicable; A link direction indication, used to indicate the link direction to which the forwarding parameter is applicable; A resource type indication, used to indicate the resource type of the time-frequency resource unit to which the forwarding parameter is applicable; An applicable status indication, used to indicate the status of the RIS node to which the forwarding parameter is applicable; A priority indication, used to indicate the priority of the forwarding configuration; The forwarding parameter indication includes a precoding matrix indication and / or a beam indication, wherein the precoding matrix indication is used to indicate the precoding matrix used by the RIS node for signal forwarding, and the beam indication is used to indicate the beam used by the RIS node for signal forwarding.

24. The method according to claim 23, characterized in that The applicable state indication is used to indicate that the forwarding parameter is used when one or more of the following states are met: The RIS node does not need to forward the target signal; The RIS node is in an abnormal state; The terminal MT functional unit of the RIS node is in a radio resource control RRC idle state or an RRC inactive state; The service cell of the MT functional unit of the RIS node is not configured with a forwarding configuration for non-target signals.

25. The method according to claim 24, characterized in that The RIS node is in an abnormal state, including at least one of the following: The MT functional unit of the RIS node is in an RRC connected state, and a radio link failure occurs in the backhaul link between the network device and the RIS node; The MT functional unit of the RIS node is in an RRC connected state, and a beam failure occurs in the backhaul link between the network device and the RIS node; The MT functional unit of the RIS node is in an RRC connected state, and the media access control MAC of the RIS node receives one or more out-of-sync indications OOS sent by the physical layer of the RIS node; The MT functional unit of the RIS node is in an RRC inactive state or an RRC idle state, the RIS node is configured to forward a target signal, and the link quality of the backhaul link between the network device and the RIS node is lower than a preset threshold; The MT functional unit of the RIS node is in an RRC inactive state or an RRC idle state, the RIS node is configured to forward a target signal, and the MT functional unit of the RIS node reselects a cell different from an original serving cell of the MT functional unit of the RIS.

26. The method according to any one of claims 21 to 25, characterized in that The first configuration information is used to configure a candidate forwarding configuration set, and the candidate forwarding configuration set includes forwarding configurations applicable to time-frequency resource units of at least one resource type.

27. The method according to claim 26, characterized in that In the candidate forwarding configuration set, time-frequency resource units of different resource types correspond to different forwarding configurations; or In the candidate forwarding configuration set, the time-frequency resource units of at least one resource type correspond to the same forwarding configuration, wherein the same forwarding configuration includes forwarding parameters of the time-frequency resource units of each resource type in the time-frequency resource units of the at least one resource type.

28. The method according to claim 27, characterized in that The time-frequency resource unit of the at least one resource type includes time-frequency resource units of multiple resource types, and the time-frequency resource units of the multiple resource types correspond to the same forwarding configuration, including: The uplink time-frequency resource unit and the flexible time-frequency resource unit correspond to the same forwarding configuration; and / or The downlink time-frequency resource unit and the flexible time-frequency resource unit correspond to the same forwarding configuration; and / or The uplink time-frequency resource unit and the downlink time-frequency resource unit correspond to the same forwarding configuration.

29. The method according to any one of claims 26 to 28, characterized in that The RIS node includes a plurality of forwarding ports, and the candidate forwarding configuration set includes forwarding configurations applicable to the plurality of forwarding ports.

30. The method according to any one of claims 21 to 29, characterized in that The forwarding configuration is a periodic or semi-static forwarding configuration.

31. The method according to claim 30, characterized in that The periodic or semi-static forwarding configuration may also include one or more of the following parameters: period, a starting position offset within a period, and an indication of a time-frequency resource unit within a period.

32. The method according to any one of claims 21 to 31, characterized in that The non-target signal includes one or more of the following signals: An incident signal when the RIS node is not configured by the network device to forward the target signal; The RIS node determines an incident signal when not forwarding a target signal according to a preconfigured condition; An incident signal after the MT functional unit of the RIS node enters the RRC inactive state; An incident signal when the MT functional unit of the RIS node enters the RRC inactive state and does not need to forward the target signal; An incident signal after the MT functional unit of the RIS node enters the RRC idle state; The MT functional unit of the RIS node enters the RRC idle state and does not need to forward the incident signal when the target signal is forwarded.

33. A signal forwarding device, characterized in that: include: A communication unit, used to forward a non-target signal based on a first forwarding configuration on a first time-frequency resource unit, wherein the first forwarding configuration is a forwarding configuration for non-target signals, and the first forwarding configuration is related to the resource configuration of the first time-frequency resource unit and / or the state of the device.

34. A signal forwarding device, characterized in that: include: A communication unit is used to send first configuration information to a reconfigurable intelligent surface (RIS) node, wherein the first configuration information includes one or more forwarding configurations for forwarding non-target signals, wherein the one or more forwarding configurations are applicable to at least one resource configuration, and / or the one or more forwarding configurations are applicable to a specific state of the RIS node.

35. A reconfigurable intelligent surface RIS node, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program implements the steps of the method according to any one of claims 1 to 20 when executed by the processor.

36. A network device, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program implements the steps in the method according to any one of claims 21 to 32 when executed by the processor.

37. A computer-readable storage medium, characterized in that: Used to store a computer program, the computer program causing a computer to execute the method according to any one of claims 1 to 20, or the method according to any one of claims 21 to 32.

38. A computer-readable storage medium, characterized in that: Used to store a computer program, the computer program causing a computer to execute the method according to any one of claims 1 to 20, or the method according to any one of claims 21 to 32.

Images