A downlink control channel indication method and device

Abstract

This application discloses a downlink control channel indication method. The wireless communication system includes network equipment, intermediate node equipment, and terminal equipment. The method includes the following steps: determining first configuration information to configure dedicated downlink control channel physical resources for intermediate nodes; determining second configuration information to indicate the configuration of dedicated downlink control channel physical resources for terminals, wherein the terminal-specific downlink control channel physical resource configuration is the same as or corresponds to the dedicated downlink control channel physical resources of the plurality of intermediate nodes; determining first downlink control signaling, the first downlink control signaling containing indication information of intermediate node channel resources; and / or determining second downlink control signaling, the second downlink control signaling containing indication information of terminal channel resources; wherein the terminal channel resources are a subset of the intermediate node channel resources. This application also includes equipment and systems for implementing the method. This application addresses the problem of high control channel overhead introduced by intermediate nodes.

Description

Technical Field

[0001] This application relates to the field of mobile communication technology, and in particular to a downlink control channel indication method and device for a wireless communication system with an intermediate node. Background Technology

[0002] The 5G NR system introduces a Network Controlled Repeater (NCR), which includes a control link (C-link) and a backhaul access link. The NCR defaults to fixed beams and uplink time-division multiplexing transmission for the C-link / backhaul link. The NCR introduces new downlink control signaling in the C-link to indicate the time-domain resources of the NCR and the corresponding beam index indication on the time-domain resources.

[0003] On the one hand, the existing control signaling design for the control link and the access backhaul link is separate, resulting in high overhead for control signaling between the two links. When the control link and the backhaul link have the same beam, it is advisable to configure the control channel resources for intermediate nodes and terminals as a unified control channel resource, using different types of identifiers to distinguish different downlink control signaling. Furthermore, the information carried by the downlink control signaling sent to intermediate nodes and terminals also overlaps to some extent. Through reasonable design, the overhead of the control channel introduced by intermediate nodes can be reduced.

[0004] On the other hand, in the scenario of distributed intermediate nodes, considering that there are backhaul links and control links between the base station and multiple intermediate nodes, it can serve a single UE at the same time, thus achieving an effect similar to multi-point transmission. The control signaling design of 5G NR is only applicable to the case where the base station controls one NCR. In order to achieve data combination of multiple intermediate nodes, it will inevitably lead to greater control channel overhead. Summary of the Invention

[0005] This application proposes a downlink control channel indication method and device to solve the problem of large control channel overhead introduced by intermediate nodes. In particular, in the scenario of distributed endpoints, it designs downlink control signaling configuration information and downlink control signaling for distributed intermediate nodes to realize multi-point cooperative transmission of distributed intermediate nodes, including a low-latency and high-reliability mechanism for multi-point transmission.

[0006] In a first aspect, embodiments of this application propose a downlink control channel indication method for use in a wireless communication system, wherein the wireless communication system includes a network device, an intermediate node device, and a terminal device; the service signal emitted by the network device is transmitted to the terminal device via the intermediate node device, and the method includes the following steps:

[0007] Determine the first configuration information, which is the physical resource configuration of the dedicated downlink control channel for intermediate nodes;

[0008] The second configuration information is determined, which is used to indicate the physical resource configuration of the terminal's dedicated downlink control channel. The physical resource configuration of one or more dedicated downlink control channels of the terminal is the same as or corresponds to the physical resource configuration of the one or more intermediate nodes' dedicated downlink control channels.

[0009] Furthermore, it also includes the following steps:

[0010] A first downlink control signaling is determined, the first downlink control signaling containing indication information of intermediate node channel resources; and / or a second downlink control signaling is determined, the second downlink control signaling containing indication information of terminal channel resources; the terminal channel resources are a subset of the intermediate node channel resources.

[0011] Preferably, the first configuration information is that one or more intermediate nodes are configured with dedicated downlink control channel physical resources, and the downlink control channel physical resource identifier is used to distinguish different distributed intermediate nodes.

[0012] Preferably, the first downlink control signaling includes at least intermediate node beam adjustment control information and / or time-frequency resource information for beam adjustment; the second downlink control signaling includes at least time-frequency resource information for terminal data transmission or reception, and / or beam information for terminal data transmission or reception; wherein the time-frequency resources indicated by the second downlink control signaling are a subset of the time-frequency resources indicated by the first downlink control signaling; and the beam information indicated by the second downlink control signaling is a subset of the beam information indicated by the first downlink control signaling.

[0013] Preferably, the number of bits carried by the first downlink control signaling is the same as the number of bits carried by the second downlink control signaling.

[0014] Preferably, HARQ information is determined based on a downlink control channel resource identifier (DRS) dedicated to one or more terminals. The HARQ information is used for independent HARQ feedback when multiple distributed nodes forward data to the terminal simultaneously. One or more of the terminal-dedicated DRS identifiers are the same as or correspond to the DRS identifiers of one or more intermediate nodes.

[0015] Preferably, the channel resources of the multiple intermediate nodes indicated by the first downlink control signaling overlap, do not overlap, or partially overlap.

[0016] Preferably, the method further includes the following steps: determining downlink data, wherein the downlink data is transmitted by resources indicated by a second downlink control signaling, and the downlink data forwarded by multiple intermediate nodes adopts frequency division multiplexing or time division multiplexing.

[0017] Preferably, the first downlink control signaling is scrambled by an intermediate node type identifier or an intermediate node identifier, and the second downlink control signaling is scrambled by a terminal type identifier or a terminal identifier.

[0018] The method described in any embodiment of the first aspect of this application, for a network device, includes the following steps: determining and sending the first configuration information; determining and sending the second configuration information.

[0019] Furthermore, the method of this application, used in a network device, further includes the following steps: determining and sending a first downlink control signaling, wherein the first downlink control signaling includes indication information of intermediate node channel resources. Further, it also includes the following step: determining and sending a second downlink control signaling, wherein the second downlink control signaling includes indication information of terminal channel resources.

[0020] Preferably, the method of this application is used in network equipment, where data sent by the base station and forwarded by intermediate nodes is scrambled with a dedicated scrambling code associated with the physical resources of the dedicated downlink control channel of the intermediate nodes.

[0021] Preferably, the method of this application is used in a network device, wherein the first downlink control signaling is scrambled with the identifier of the intermediate node or the type identifier of the intermediate node.

[0022] Preferably, the method of this application is used in a network device, wherein the second downlink control signaling is scrambled with a terminal type identifier or a terminal identifier.

[0023] Preferably, the method of this application is used in a network device to receive HARQ information and determine the HARQ codewords according to multiple downlink control channel resource identifiers dedicated to the terminal. The one or more downlink control channel resources dedicated to the terminal correspond to one or more downlink control channel resources dedicated to intermediate nodes.

[0024] The method described in any embodiment of the first aspect of this application, used for intermediate nodes, includes the following steps:

[0025] Receive and confirm the first configuration information; receive and forward the second configuration information to the terminal device.

[0026] Furthermore, the method of this application, used for intermediate nodes, further includes the following steps: receiving and determining a first downlink control signaling, the first downlink control signaling containing indication information of intermediate node channel resources; confirming and forwarding a second downlink control signaling, the second downlink control signaling containing indication information of terminal channel resources; wherein the terminal channel resources are a subset of the intermediate node channel resources.

[0027] Preferably, the method of this application is used for intermediate nodes and further includes the following steps: forwarding data from network devices to terminals and descrambling it with intermediate node-specific scrambling codes, wherein the specific scrambling codes are associated with the physical resources of the intermediate node-specific downlink control channel.

[0028] Preferably, the method of this application is used for intermediate nodes and further includes the following steps: forwarding downlink data from network-side devices to terminals, wherein the downlink data is transmitted by resources indicated by a second downlink control signaling, and the downlink data of multiple intermediate nodes adopts frequency division multiplexing or time division multiplexing.

[0029] Preferably, the method of this application is used in an intermediate node to receive the first downlink control signaling and descramble it with the intermediate node's type identifier or the intermediate node's identifier; and / or to forward the second downlink control signaling and scramble it with the terminal's type identifier or the terminal's identifier.

[0030] The method described in any embodiment of the first aspect of this application, for a terminal device, includes the following steps: receiving the second configuration information; determining the second configuration information and / or the first configuration information.

[0031] Furthermore, the method of this application is used for a terminal device and further includes the following steps: receiving and determining a second downlink control signaling, wherein the second downlink control signaling contains indication information of terminal channel resources; the terminal channel resources are a subset of the intermediate node channel resources.

[0032] Preferably, the method of this application is used in a terminal device to receive the second downlink control signaling and descramble it using a terminal type identifier or a terminal identifier.

[0033] Preferably, the method of this application is used in a terminal device to receive and determine downlink data, wherein the downlink data is transmitted by resources indicated by a second downlink control signaling, and the downlink data of multiple intermediate nodes adopts frequency division multiplexing or time division multiplexing.

[0034] Preferably, the method of this application is used in a terminal device to send HARQ information and determine HARQ codewords according to multiple downlink control channel resource identifiers dedicated to the terminal. The multiple downlink control channel resources dedicated to the terminal correspond to multiple downlink control channel resources dedicated to intermediate nodes.

[0035] Secondly, embodiments of this application also propose a communication device (i.e., a network device) for implementing the method described in any embodiment of the first aspect of this application. At least one module in the communication device is configured to perform at least one of the following functions: determining first configuration information; determining second configuration information; sending the first configuration information; sending the second configuration information; sending a first downlink control signaling to an intermediate node; sending a second downlink control signaling to a terminal via the intermediate node or directly; sending downlink data to a terminal or receiving uplink data via the intermediate node; and receiving HARQ information from a terminal device via the intermediate node or directly.

[0036] Thirdly, embodiments of this application also propose a communication device (i.e., an intermediate node) for implementing the method described in any embodiment of the first aspect of this application. At least one module in the communication device is configured to perform at least one of the following functions: receiving first configuration information; receiving second configuration information; determining the first configuration information; determining the second configuration information; receiving first downlink control signaling and determining the first downlink control signaling; forwarding second downlink control signaling; forwarding downlink data from the network device to the terminal device; and forwarding uplink data or HARQ information from the terminal device to the network device.

[0037] Fourthly, embodiments of this application also propose a communication device (i.e., a terminal device) for implementing the method described in any embodiment of the first aspect of this application. At least one module in the communication device is configured to perform at least one of the following functions: receiving second configuration information; determining the second configuration information; determining first configuration information; receiving second downlink control signaling; determining the second downlink control signaling; receiving downlink data from an intermediate node; and sending HARQ information.

[0038] Fifthly, this application also proposes a communication device, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program, when executed by the processor, implements the steps of the method as described in any embodiment of this application.

[0039] Sixthly, this application also proposes a computer-readable medium on which a computer program is stored, which, when executed by a processor, implements the steps of the method as described in any embodiment of this application.

[0040] Seventhly, this application also proposes a mobile communication system comprising at least one network device as described in any embodiment of this application, and at least one intermediate node device as described in any embodiment of this application. Further, it also comprises at least one terminal device as described in any embodiment of this application.

[0041] The above-described technical solutions adopted in the embodiments of this application can achieve the following beneficial effects:

[0042] This application addresses the transmission of distributed intermediate nodes by designing a dedicated downlink control channel resource configuration method for intermediate nodes, as well as the corresponding downlink control signaling design for intermediate nodes and terminals. This enables multi-point cooperative transmission among multiple intermediate nodes and further achieves low-latency, high-reliability repetitive transmission of data from multiple intermediate nodes to the terminal. For a single intermediate node, the designed downlink control signaling configures the same downlink control channel resources on the control links between the base station and the intermediate node, as well as on the backhaul link from the base station to the terminal. This achieves the multiplexing of downlink control channel resources from the base station to the intermediate node and the terminal, which can significantly reduce the overhead of downlink control channel resources and is preferably suitable for situations where the backhaul link and control link transmit simultaneously. Attached Figure Description

[0043] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0044] Figure 1 A schematic diagram of a distributed RIS wireless communication system;

[0045] Figure 2 This is a flowchart illustrating an embodiment of the method of this application;

[0046] Figure 3 This is a schematic diagram of the first downlink control signaling indication information;

[0047] Figure 4 This is a schematic diagram of the channel's time-frequency resources and beam direction;

[0048] Figure 5 This is a schematic diagram of the second downlink control signaling indication information;

[0049] Figure 6 This is a flowchart illustrating an embodiment of the method of this application used in a network device;

[0050] Figure 7 This is a flowchart illustrating an embodiment of the method of this application used in intermediate nodes;

[0051] Figure 8 This is a flowchart illustrating an embodiment of the method of this application used in a terminal device;

[0052] Figure 9 This is a schematic diagram of an embodiment of a network device;

[0053] Figure 10 This is a schematic diagram of an embodiment of an intermediate node;

[0054] Figure 11 This is a schematic diagram of an embodiment of the terminal device;

[0055] Figure 12 This is a schematic diagram of the network device of the present invention;

[0056] Figure 13 This is a block diagram of the intermediate node of the present invention;

[0057] Figure 14 This is a block diagram of the terminal device of the present invention. Detailed Implementation

[0058] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0059] The technical solutions provided by the various embodiments of this application are described in detail below with reference to the accompanying drawings.

[0060] Figure 1 A schematic diagram of a distributed RIS wireless communication system.

[0061] Network Control Relays (NCRs) employ, for example, Reflectors Reflecting Signals (RIS). RISs are similar to dish antennas used in satellite receivers; they are passive devices that reflect signals to improve the signal-to-noise ratio. One or more RISs can be flexibly deployed to mitigate detected coverage holes or provide additional capacity in areas where needed.

[0062] Deploying intermediate nodes facilitates the formation of both types of beams, such as Figure 1 As shown, an RIS (Radio Infrared Array) is deployed in a system to facilitate communication between a multi-antenna transmitter and a user. Information signals are radiated from the transmitter, and there may be a direct path for communication between the transmitter and the user. The RIS also receives and reflects these signals, and the main direction of the reflected signal can be controlled using an infrared controller.

[0063] On the other hand, if no direct path exists due to severe shadowing or congestion, the transmitter should perform beamforming on the RIS. The RIS can then act as a non-amplified full-duplex relay, reflecting and focusing the signal onto the terminal device (UE) to facilitate end-to-end communication.

[0064] Another approach to Network Control Relay (NCR) is distributed deployment, where multiple relays are deployed under a single base station, with the base station controlling each relay to serve users. Smart Metasurface (RIS) can be considered a type of NCR relay. Taking RIS as an example, as shown in the diagram, there are two RISs under the base station, each serving three users. User UE#1's data comes from both RISs, and each RIS has a corresponding backhaul link to the base station.

[0065] In the scenario of distributed intermediate nodes, considering that there are backhaul links and control links between the base station and multiple intermediate nodes, it can serve a single UE at the same time, thus achieving an effect similar to multi-point transmission. The control signaling design of 5G NR is only applicable to the case where the base station controls one NCR. Therefore, it is necessary to design downlink control signaling configuration information and downlink control signaling for distributed intermediate nodes to realize multi-point cooperative transmission of distributed intermediate nodes, including low-latency and high-reliability mechanisms for multi-point transmission.

[0066] It should be noted that the intermediate node in this application uses methods such as reflection or refraction to control the waveform parameters of electromagnetic waves propagating in the communication channel to improve the performance of the communication system, and is not limited to the use of RIS technology.

[0067] Figure 2 This is a flowchart illustrating an embodiment of the method of this application.

[0068] In a first aspect, embodiments of this application propose a downlink control channel indication method for use in a wireless communication system, wherein the wireless communication system includes a network device, an intermediate node device, and a terminal device; the service signal emitted by the network device is transmitted to the terminal device via the intermediate node device, and the method includes the following steps:

[0069] Step 110: Determine the first configuration information, which is the physical resource for configuring a dedicated downlink control channel for intermediate nodes;

[0070] Preferably, the first configuration information configures dedicated downlink control channel physical resources for one or more intermediate nodes respectively, and the downlink control channel physical resource identifier is used to distinguish different distributed intermediate nodes.

[0071] Step 120: Determine the second configuration information. The second configuration information includes indication information of multiple intermediate node dedicated downlink control channel physical resources. The second configuration information is used to indicate the configuration of one or more dedicated downlink control channel physical resources of the terminal. The configuration of one or more dedicated downlink control channel physical resources of the terminal is the same as or corresponds to the one or more intermediate node dedicated downlink control channel physical resources.

[0072] Furthermore, it also includes the following steps:

[0073] Step 130: Determine a first downlink control signaling, the first downlink control signaling containing indication information of intermediate node channel resources; and / or, determine a second downlink control signaling, the second downlink control signaling containing indication information of terminal channel resources; the terminal channel resources are a subset of the intermediate node channel resources.

[0074] Preferably, the first downlink control signaling includes at least intermediate node beam adjustment control information and / or time-frequency resource information for beam adjustment; the second downlink control signaling includes at least time-frequency resource information for terminal data transmission or reception, and / or beam information for terminal data transmission or reception; wherein the time-frequency resources indicated by the second downlink control signaling are a subset of the time-frequency resources indicated by the first downlink control signaling; and the beam information indicated by the second downlink control signaling is a subset of the beam information indicated by the first downlink control signaling.

[0075] Preferably, the number of bits carried by the first downlink control signaling is the same as the number of bits carried by the second downlink control signaling.

[0076] Preferably, the channel resources of the multiple intermediate nodes indicated by the first downlink control signaling overlap, do not overlap, or partially overlap.

[0077] Preferably, the first downlink control signaling is scrambled by an intermediate node type identifier or an intermediate node identifier, and the second downlink control signaling is scrambled by a terminal type identifier or a terminal identifier.

[0078] Step 140, preferably, further includes the following steps: determining downlink data, wherein the downlink data is transmitted by resources indicated by the second downlink control signaling, and the downlink data approved for transmission through multiple intermediate nodes adopts frequency division multiplexing or time division multiplexing.

[0079] Step 150: Preferably, HARQ information is determined based on one or more terminal-specific downlink control channel resource identifiers. The HARQ information is used for independent HARQ feedback when multiple distributed nodes forward data to the terminal simultaneously.

[0080] Among them, one or more of the terminal-specific downlink control channel resource identifiers and one or more intermediate node downlink control channel resource identifiers are the same or correspond to each other.

[0081] The following Examples 1-3 further illustrate how to implement the method described in the first aspect of this application in a system.

[0082] Example 1

[0083] A channel configuration and indication method for an intermediate node, used to implement the transmission and reception of an intermediate node controlled by a base station, specifically includes the following steps:

[0084] To implement step 110, the intermediate node receives the first configuration information sent by the base station, wherein the configuration information configures the intermediate node with dedicated downlink control channel physical resources.

[0085] For example, the intermediate node identifier under the base station is 0, and the base station configures CORESET0 for intermediate node 0 to send downlink control signaling to the intermediate node.

[0086] Preferably, the downlink control channel physical resources are transmitted using a wide beam.

[0087] To achieve step 130, the intermediate node detects the first downlink control signaling in the corresponding downlink control channel physical resources, and the first downlink control signaling is scrambled with the type identifier of the intermediate node.

[0088] Define the identifier (NT_RNTI) of the intermediate node type to scramble the first downlink control signaling, which is used by the intermediate node to decode the first downlink control signaling. The intermediate node detects the first downlink control signaling on the configured CORESET.

[0089] Preferably, the content of the first downlink control signaling includes at least information on intermediate node beam adjustment and time-frequency resource information corresponding to the beam adjustment.

[0090] The first downlink control signaling includes beam adjustment information for intermediate nodes, as well as the time and frequency resources corresponding to beam adjustment. For example, the downlink control signaling for an intermediate node... Figure 3 This is a schematic diagram of the first downlink control signaling indication information, such as... Figure 3 As shown, the size of the first downlink control signaling is R, meaning the number of bits in the first downlink control signaling is R bits. The system bandwidth is divided into N time-frequency resource blocks. The beam and information of each time-frequency resource block are indicated by the first downlink control signaling. For example, the starting point S and the length L occupied by the first downlink control signaling block#2 are the information of each time-frequency resource block and its corresponding beam information. P bits are used to indicate the beam direction, and LP bits are used to indicate the information of the time-frequency resource block. The first downlink control signaling is transmitted on the control link between the base station and intermediate nodes.

[0091] Instructions from the first downlink control signaling, Figure 4 This is a schematic diagram of the channel's time-frequency resources and beam direction. (Example:) Figure 4 As shown, the beam direction adjusted by the intermediate node on time-frequency resource block 1 is beam #1, the beam direction adjusted on time-frequency resource block 2 is beam #2, and the beam direction adjusted on time-frequency resource block 3 is beam #3.

[0092] To achieve step 120, the terminal receives second configuration information sent by the base station, the second configuration information being the downlink control channel physical resource configuration dedicated to the terminal.

[0093] For example, the base station sends the second configuration information to the terminal to configure CORESET_UE. The CORESET_UE0 corresponds to or is completely equivalent to the CORESET0 dedicated to the intermediate node. That is, CORESET_UE corresponds to or is equivalent to the CORESET0 corresponding to intermediate node 0.

[0094] Because the control channel is transmitted over a wide beam, the terminal can also receive the control channel.

[0095] To implement step 130, the terminal detects the second downlink control signaling on all configured downlink control channel physical resources. The second downlink control signaling is scrambled with the terminal's identifier. The content of the second downlink control signaling includes at least time-frequency resource information for data transmitted or received by the terminal, and beam information for data transmitted or received by the terminal. The time-frequency resources indicated by the second downlink control signaling are a subset of the time-frequency resources indicated by the first downlink control signaling, and the beam information indicated by the second downlink control signaling is a subset of the beam information indicated by the first downlink control signaling.

[0096] Method 1: The terminal detects the second downlink control signaling on CORESET_UE, and the second downlink control signaling is scrambled with the terminal's UE ID. If the terminal detects the second downlink control signaling on CORESET_UE, it can determine that the data comes from intermediate node 0. Therefore, the time-frequency resources of this data are a subset of the time-frequency resources of the data of intermediate node 0 indicated by the first downlink control signaling, and the beam is also a subset of the beam information of intermediate node 0 indicated by the first downlink control signaling.

[0097] Table 1 Second Downlink Control Signaling Indication Information

[0098]

[0099] The second downlink control signaling uses log2(N) bits to indicate one of the time-frequency resource blocks 1, 2, ..., N from RIS0. That is, the time-frequency resources and beam information indicated by the second downlink control signaling for the terminal are all subsets of the information indicated by the first downlink control signaling.

[0100] When CORESET_UE0 and CORESET0 are equal, the information other than (R-log2(N)) bits can be used to indicate the terminal's HARQ, MCS and other information to ensure that the size of the first downlink control signaling and the second downlink control signaling detected by the terminal and intermediate nodes are the same, which can reduce the search overhead of the terminal and intermediate nodes.

[0101] Method 2: The terminal detects the second downlink control signaling on the CORESET_UE, and the second downlink control signaling is scrambled with the terminal type identifier (UT_RNTI). If the terminal detects the second downlink control signaling on the CORESET_UE, it can determine that the data comes from intermediate node 0. Therefore, the time-frequency resources of this data are a subset of the time-frequency resources of the data of intermediate node 0 indicated by the first downlink control signaling, and the beam is also a subset of the beam information of intermediate node 0 indicated by the first downlink control signaling.

[0102] Figure 5 This is a schematic diagram of the second downlink control signaling indication information. For example... Figure 5 As shown, there are N indicator blocks, each indicating the beam information and time-frequency resource block information of a UE. The higher-layer signaling configures the size of the first downlink control signaling as R1. For example, the starting point S1 and length L1 of the first downlink control signaling block #2 represent the information of each time-frequency resource block and its corresponding beam information. P1 bits indicate the beam information of each UE, and L1-P1 bits indicate the time-frequency resource block information of each UE. The starting position of the indicator information for each UE in the indicator block is given by the higher-layer configuration information. The terminal device receives the block information (starting point S1 and length L1) configured by the higher-layer signaling and decodes the second signaling scrambled with the terminal type identifier (UT_RNTI).

[0103] The second downlink control signaling shown is sent on the backhaul access link.

[0104] Example 2

[0105] A downlink control channel indication method in a distributed intermediate node application scenario includes configuration and control command procedures to enable multi-point cooperative transmission by intermediate nodes under the base station and multi-point cooperative reception by terminals. Specifically, it includes the following steps:

[0106] To implement step 110, the intermediate node receives first configuration information sent by the base station. The first configuration information is a dedicated downlink control channel physical resource configuration for the intermediate node, and the downlink control channel physical resource identifier corresponds to the identifier of the distributed intermediate node.

[0107] For example, a base station has three distributed intermediate nodes. The base station configures a dedicated downlink control channel resource set (CORESET) for each of the three intermediate nodes: intermediate node 0, intermediate node 1, and intermediate node 2. These control channel resource sets are used to send downlink control signaling to the intermediate nodes. Different CORESETs are used to distinguish different intermediate nodes.

[0108] Method 1: During configuration, CORESET0 corresponds to intermediate node 0, CORESET1 corresponds to intermediate node 1, and CORESET2 corresponds to intermediate node 2. That is, intermediate node 0 is only decoded on CORESET0, intermediate node 1 is only decoded on CORESET1, and intermediate node 2 is only decoded on CORESET2.

[0109] Method 2: During configuration, assign CORESET0, CORESET1 and CORESET2 to the three intermediate nodes. Each intermediate node needs to perform decoding detection on the three COREESTs.

[0110] Preferably, the downlink control channel physical resources are transmitted using a wide beam.

[0111] To achieve step 120, the terminal receives second configuration information sent by the base station, the second configuration information being the downlink control channel physical resource configuration dedicated to the terminal.

[0112] Generally, the second configuration information is forwarded through intermediate nodes.

[0113] For example, if a terminal is served by three RIS, the base station sends a second configuration information to the terminal, configuring three CORESETs, namely CORESET_UE0, CORESET_UE1 and CORESET_UE2. These three CORESETs correspond to or are exactly the same as the CORESET0, CORESET1 and CORESET2 dedicated to intermediate nodes. That is, CORESET_UE0 corresponds to or is the same as CORESET0 corresponding to intermediate node 0, CORESET_UE1 corresponds to or is the same as CORESET1 corresponding to intermediate node 1, and CORESET_UE2 corresponds to or is the same as CORESET2 corresponding to intermediate node 2.

[0114] Because the control channel is transmitted over a wide beam, the terminal can also receive the control channel.

[0115] To achieve step 130, the intermediate node detects the first downlink control signaling in the corresponding downlink control channel physical resources, and the first downlink control signaling is scrambled with the type identifier of the intermediate node.

[0116] Define the identifier (NT_RNTI) of the intermediate node type to scramble the first downlink control signaling, which is used by the intermediate node to decode the first downlink control signaling. Each intermediate node detects the first downlink control signaling on three CORESETs, or each intermediate node detects the first downlink control signaling on the corresponding CORESET.

[0117] Preferably, the content of the first downlink control signaling includes at least information on intermediate node beam adjustment and time-frequency resource information corresponding to the beam adjustment.

[0118] The first downlink control signaling includes the beam adjustment information for the corresponding intermediate node, as well as the time and frequency resources corresponding to the beam adjustment. For example, the downlink control signaling for an intermediate node... Figure 3 This is a schematic diagram of the first downlink control signaling indication information, such as... Figure 3 As shown, the size of the first downlink control signaling in the higher-layer signaling configuration is R, meaning the first downlink control signaling contains R bits. The system bandwidth is divided into N time-frequency resource blocks. The beam and information of each time-frequency resource block are indicated by the first downlink control signaling. For example, the starting point S and the length L occupied by the first downlink control signaling block#2 represent the information and corresponding beam information of each time-frequency resource block. P bits are used to indicate the beam direction, and LP bits are used to indicate the information of the time-frequency resource block. The first downlink control signaling is transmitted on the control link of the intermediate node.

[0119] Figure 4 This is a schematic diagram of the channel's time-frequency resources and beam direction. (Example:) Figure 4 As shown, by means of the first downlink control signaling, the intermediate node adjusts the beam direction to beam #1 on time and frequency resource block 1, the beam direction to beam #2 on time and frequency resource block 2, and the beam direction to beam #3 on time and frequency resource block 3.

[0120] To further implement step 130, the terminal detects the second downlink control signaling on all configured downlink control channel physical resources. The second downlink control signaling is scrambled with the terminal's identifier. The content of the second downlink control signaling includes at least time-frequency resource information for data transmitted or received by the terminal, and beam information for data transmitted or received by the terminal. The time-frequency resources indicated by the second downlink control signaling are a subset of the time-frequency resources indicated by the first downlink control signaling, and the beam information indicated by the second downlink control signaling is a subset of the beam information indicated by the first downlink control signaling.

[0121] Method 1: The terminal detects the second downlink control signaling on CORESET_UE0, CORESET_UE1, and CORESET_UE2 respectively, and the second downlink control signaling is scrambled with the terminal's UE ID. If the terminal detects the second downlink control signaling on CORESET_UE0, it can determine that the data comes from intermediate node 0. Therefore, the time-frequency resources of this data are a subset of the time-frequency resources of the data of intermediate node 0 indicated by the first downlink control signaling, and the beam is also a subset of the beam information of intermediate node 0 indicated by the first downlink control signaling.

[0122] The second downlink control signaling indication information is shown in Table 1. The second downlink control signaling uses log2(N) bits to indicate one of the time-frequency resource blocks 1, 2, ..., N from RIS0. That is, the time-frequency resources and beam information for the terminal indicated by the second downlink control signaling are all subsets of the first downlink control signaling indication information.

[0123] When CORESET_UE0 and CORESET0 are the same, information other than (R-log2(N)) bits can be used to indicate the terminal's HARQ, MCS and other information to ensure that the size of the first downlink control signaling and the second downlink control signaling detected by the terminal and intermediate nodes are the same.

[0124] Method 2: The terminal detects the second downlink control signaling on CORESET_UE0, CORESET_UE1, and CORESET_UE2 respectively, and the second downlink control signaling is scrambled with the terminal type identifier (UT_RNTI). If the terminal detects the second downlink control signaling on CORESET_UE0, it can determine that the data comes from intermediate node 0. Therefore, the time-frequency resources of this data are a subset of the time-frequency resources of the data of intermediate node 0 indicated by the first downlink control signaling, and the beam is also a subset of the beam information of intermediate node 0 indicated by the first downlink control signaling.

[0125] Figure 5 This is a schematic diagram of the second downlink control signaling indication information. For example... Figure 5 As shown, it contains N indicator blocks, each indicating the beam information and time-frequency resource block information of a UE. Each block contains P bits indicating the beam information of each UE and LP bits indicating the time-frequency resource block information of each UE. The starting position of the indicator information corresponding to each UE in the indicator block is given by the higher-layer configuration information. The terminal device receives the block information (start point S and length L) configured by the higher-layer signaling and decodes the second signaling scrambled with the terminal type identifier (UT_RNTI).

[0126] The second downlink control signaling shown is sent on the backhaul access link.

[0127] To achieve step 140, the data received by the intermediate node is scrambled using a scrambling code specific to the intermediate node, and the scrambling code is associated with the physical resources of the downlink control channel specific to the intermediate node.

[0128] The data received by intermediate nodes is scrambled using a scrambling code specific to each intermediate node. This scrambling code is associated with the physical resources of the downlink control channel (PDSCH) dedicated to the intermediate node. For example, when an intermediate node transmits data to a terminal on the backhaul link, considering that a terminal may receive data from multiple intermediate nodes, different scrambling codes are used to reduce interference between downlink data from different intermediate nodes. Specifically, the base station can configure two scrambling code initialization values, each associated with a different CORESET index. Thus, the initial scrambling code value for the PDSCH can be determined based on the CORESET index. Because different CORESET indices correspond to the indices of intermediate nodes, it ensures that the scrambling codes for downlink data from different nodes are different, reducing interference between downlink data from different intermediate nodes.

[0129] To achieve step 150, the terminal reports HARQ feedback based on the detected downlink control channel resource identifier, which is used for independent HARQ feedback when multiple distributed nodes send data to the terminal at the same time. HARQ codewords are generated based on the downlink control channel resource identifier and fed back to the base station.

[0130] Independent HARQ feedback means that the terminal puts the HARQ information of the data forwarded from the same intermediate node into one HARQ codebook and distinguishes the intermediate nodes by the CORESET identifier. That is, the HARQ information of the downlink data decoded by CORESET0 is put into one HARQ codebook, while the HARQ information of the downlink information decoded by CORESET1 is put into another HARQ codebook.

[0131] Example 3

[0132] A channel indication method for distributed intermediate nodes is disclosed. The intermediate nodes receive first configuration information sent by a base station. This configuration information specifies dedicated downlink control channel physical resource configurations for the intermediate nodes, and the downlink control channel physical resource identifier corresponds to the identifier of the distributed intermediate node. The time-frequency resources indicated by the first downlink control signaling received by different intermediate nodes do not overlap. The downlink data from different intermediate nodes indicated by the second downlink control signaling detected by the terminal in the dedicated search space of the intermediate nodes are transmitted using frequency division multiplexing or time division multiplexing to achieve low-latency, high-reliability service transmission. The redundancy versions (RVs) of the downlink data from different intermediate nodes indicated by the second downlink control signaling received by the terminal may be the same or different. Specific implementation steps are as follows:

[0133] As in Example 2, step 110 is implemented, whereby the intermediate node receives the first configuration information sent by the base station. The configuration information is a dedicated downlink control channel physical resource configuration for the intermediate node, and the downlink control channel physical resource identifier corresponds to different distributed intermediate nodes.

[0134] As in Example 2, in step 120, the terminal receives the second configuration information sent by the base station. The second configuration information is the dedicated downlink control channel physical resource configuration for all intermediate nodes. The downlink control channel physical resources configured for the terminal and the downlink control channel physical resources configured for the intermediate nodes are corresponding or the same.

[0135] As in Example 2, step 130 is implemented, whereby the intermediate node detects the first downlink control signaling in the corresponding downlink control channel physical resources, and the first downlink control signaling is scrambled using the type of the intermediate node or the identifier of the intermediate node.

[0136] Preferably, the content of the first downlink control signaling includes at least information on intermediate node beam adjustment and time-frequency resource information corresponding to the beam adjustment. The base station instructs different intermediate nodes to send time-frequency resource information to the same terminal without overlap, ensuring that the downlink data of the base station can achieve low-latency and high-reliability transmission through different intermediate nodes via frequency division multiplexing, time division multiplexing, and other methods.

[0137] For example, a base station controls two intermediate nodes to serve a terminal. The time and frequency resource information indicated by the base station in the first downlink control signaling to intermediate node 0 does not overlap with the time and frequency resource information indicated by intermediate node 1, ensuring that the time and frequency resources scheduled to a terminal from multiple intermediate nodes do not overlap.

[0138] As in step 130 of Embodiment 2, the terminal detects the second downlink control signaling on all configured downlink control channel physical resources. The second downlink control signaling is scrambled with the terminal's identifier. The content of the second downlink control signaling includes at least time-frequency resource information for data transmitted or received by the terminal, and beam information for data transmitted or received by the terminal. The time-frequency resources indicated by the second downlink control signaling are a subset of the time-frequency resources indicated by the first downlink control signaling, and the beam information indicated by the second downlink control signaling is a subset of the beam information indicated by the first downlink control signaling. The RVs of downlink data from different intermediate nodes indicated by the second downlink control signaling may be the same or different.

[0139] For example, in a system where one base station controls two intermediate nodes, since the time-frequency resource configurations sent to the intermediate nodes do not overlap, and the time resources received by the terminal from multiple intermediate nodes do not overlap, time-division multiplexing can be used. The base station sends independent RVs of the same data block to multiple intermediate nodes to achieve low-latency, high-reliability transmission. If the frequency resources received by the terminal from multiple intermediate nodes do not overlap, frequency-division multiplexing can be used. The base station sends different parts of a redundant version of the same data to multiple intermediate nodes, or transmits independent RVs of the same transport block separately, to achieve low-latency, high-reliability transmission.

[0140] Figure 6 This is a flowchart illustrating an embodiment of the method of this application used in a network device.

[0141] The method of the first aspect of this application, used in a network device, includes the following steps:

[0142] Step 210: Determine and send the first configuration information.

[0143] Step 220: Determine and send the second configuration information.

[0144] Step 230: Determine and send a first downlink control signaling, the first downlink control signaling containing indication information of intermediate node channel resources. Further, it also includes the following step: Determine and send a second downlink control signaling, the second downlink control signaling containing indication information of terminal channel resources.

[0145] Preferably, the first downlink control signaling is scrambled with the identifier of the intermediate node.

[0146] Step 240: The data sent by the base station and forwarded by the intermediate node is scrambled with a dedicated scrambling code associated with the physical resources of the dedicated downlink control channel of the intermediate node.

[0147] Furthermore, the method of this application is used in network devices to receive HARQ information and determine the HARQ codewords based on multiple downlink control channel resource identifiers dedicated to the terminal. Each of the terminal-dedicated downlink control channel resources corresponds to one or more downlink control channel resources dedicated to intermediate nodes.

[0148] Figure 7 This is a flowchart illustrating an embodiment of the method of this application used for intermediate nodes.

[0149] The method of the first aspect of this application, used for intermediate nodes, includes the following steps:

[0150] Step 310: Receive and confirm the first configuration information.

[0151] Step 320: Receive and confirm the second configuration information, and forward the second configuration information to the terminal device.

[0152] Step 330: Receive and determine the first downlink control signaling, wherein the first downlink control signaling contains indication information of intermediate node channel resources;

[0153] Preferably, the first downlink control signaling is received and descrambled using the type identifier or identifier of the intermediate node.

[0154] Step 340: Determine and forward the second downlink control signaling, which contains indication information of terminal channel resources; the terminal channel resources are a subset of the intermediate node channel resources.

[0155] Preferably, the second downlink control signaling is forwarded and scrambled with a terminal type identifier or a terminal identifier.

[0156] Step 350: Receive data from network devices and descramble it using intermediate node-specific scrambling codes, which are associated with the physical resources of the intermediate node-specific downlink control channel.

[0157] Step 360: Forward downlink data from network-side devices to the terminal. The downlink data is transmitted by resources indicated by the second downlink control signaling. Downlink data from multiple intermediate nodes adopts frequency division multiplexing or time division multiplexing.

[0158] Step 370: Forward uplink data or HARQ information from the terminal device to the network device.

[0159] The HARQ information is received, and the receiving node of the HARQ information is determined according to the downlink control channel resource identifier dedicated to intermediate nodes.

[0160] Figure 8 This is a flowchart of an embodiment of the method of this application used in a terminal device.

[0161] Step 410: Receive the second configuration information and determine the second configuration information and / or the first configuration information.

[0162] Step 420: Receive and determine the second downlink control signaling, which contains indication information of terminal channel resources; the terminal channel resources are a subset of the intermediate node channel resources.

[0163] Preferably, the method of this application is used in a terminal device to receive the second downlink control signaling and descramble it using a terminal type identifier or a terminal identifier.

[0164] Step 430: Receive and determine downlink data. The downlink data is transmitted by resources indicated by the second downlink control signaling. The downlink data of multiple intermediate nodes adopts frequency division multiplexing or time division multiplexing.

[0165] Step 440: Send HARQ information, determining the HARQ codewords based on the multiple downlink control channel resource identifiers dedicated to the terminal. These multiple downlink control channel resources dedicated to the terminal correspond to multiple downlink control channel resources dedicated to intermediate nodes.

[0166] Figure 9 This is a schematic diagram of a network device implementation.

[0167] This application also proposes a communication device (i.e., a network device) using the method of any embodiment of this application, wherein at least one module in the network device is used for at least one of the following functions: determining first configuration information; determining second configuration information; sending the first configuration information; sending the second configuration information; sending a first downlink control signaling to an intermediate node; sending a second control signaling to a terminal via the intermediate node or directly; sending downlink data to a terminal or receiving uplink data via the intermediate node; and receiving HARQ information from a terminal device via the intermediate node or directly.

[0168] To implement the above technical solution, this application proposes a communication device 500, which includes a network transmitting module 501, a network determining module 502, and a network receiving module 503.

[0169] The network sending module is used to send the first configuration information, send the second configuration information, send the first downlink control signaling, send the second downlink control signaling, and send downlink data to the intermediate node.

[0170] The network determination module is used to determine the first configuration information and the second configuration information.

[0171] The network receiving module is used to receive uplink data and receive feedback HARQ information.

[0172] Other specific methods for implementing the functions of the network sending module, network determining module, and network receiving module are described in the various method embodiments of this application, and will not be repeated here.

[0173] The network equipment described in this application may be a base station device or a network-side processing device connected to a base station.

[0174] Figure 10 This is a schematic diagram of an embodiment of an intermediate node.

[0175] This application also proposes a communication device (i.e., an intermediate node) using the method of any embodiment of this application, wherein at least one module in the intermediate node is configured to perform at least one of the following functions: receiving first configuration information; receiving second configuration information; determining the first configuration information; determining the second configuration information; receiving first downlink control signaling; determining the first downlink control signaling; determining the second downlink control signaling; forwarding the second downlink control signaling; forwarding downlink data from the network device to the terminal device; and forwarding uplink data or HARQ information from the terminal device to the network device.

[0176] To implement the above technical solution, this application proposes an intermediate node 600 for controlling a reflection unit (e.g., a smart metasurface 604) or other phase transformation device, which includes an intermediate transmitting module 601, an intermediate determining module 602, and an intermediate receiving module 603.

[0177] The intermediate receiving module is used to receive the first configuration information, receive the second configuration information, receive the first downlink control signaling, receive the downlink data from the network device, and receive HARQ information from the terminal device.

[0178] The intermediate determination module is used to determine the first configuration information, the second configuration information, the first downlink control signaling, and the second downlink control signaling.

[0179] The intermediate transmission module is used to forward downlink signals and uplink signals, specifically, to send the second configuration information, the second downlink control signaling, and downlink data.

[0180] The intermediate node mentioned in this application may refer to a mobile terminal or other device specifically used to control the reflection unit or other phase conversion device connected to the reflection unit or other phase conversion device.

[0181] Figure 11 This is a schematic diagram of an embodiment of the terminal device;

[0182] This application also proposes a communication device (i.e., a terminal device) using the method of any embodiment of this application, wherein at least one module in the terminal device is used for at least one of the following functions: receiving second configuration information; determining the second configuration information; determining first configuration information; receiving second downlink control signaling; determining the second downlink control signaling; receiving downlink data from an intermediate node; and sending HARQ information.

[0183] To implement the above technical solution, this application proposes a terminal device 700, which includes a terminal sending module 701, a terminal determining module 702, and a terminal receiving module 703.

[0184] The terminal receiving module is used to receive the second configuration information, receive the second downlink control signaling, and receive the downlink data.

[0185] The terminal determination module is used to determine the second configuration information and the second downlink control signaling.

[0186] The terminal sending module is used to send the HARQ information.

[0187] The terminal device described in this application may be a mobile terminal device.

[0188] Figure 12 A schematic diagram of the network device of the present invention is shown. As shown, the network device 800 includes a processor 801, a wireless interface 802, and a memory 803. The wireless interface may consist of multiple components, including a transmitter and a receiver, providing a unit for communication with various other devices over a transmission medium. The wireless interface implements communication functions with the intermediate node, processes wireless signals through receiving and transmitting devices, and the data carried by the signals is communicated with the memory or processor via an internal bus structure. The memory 803 contains a computer program that executes any of the embodiments of the network device or terminal device described in this application, and the computer program runs or is modified by the processor 801. When the memory, processor, and wireless interface circuit are connected through a bus system, the bus system includes a data bus, a power bus, a control bus, and a status signal bus, which will not be described in detail here.

[0189] Figure 13 This is a block diagram of an intermediate node according to another embodiment of the present invention. The intermediate node 900 includes at least one processor 901, a memory 902, a network interface 903, and at least one control interface 904. The various components in the intermediate node 900 are coupled together via a bus system. The bus system is used to enable communication between these components. The bus system includes a data bus, a power bus, a control bus, and a status signal bus.

[0190] The control interface 904 is used to connect the phase transformation device (e.g., metasurface device) of the intermediate node, convert the multiple sets of control parameters into driving signals for each surface unit, and realize the adjustment of the reflection (or refraction) signal of the intermediate node.

[0191] Figure 14 This is a block diagram of the terminal device of the present invention.

[0192] Terminal device A00 includes at least one processor A01, memory A02, user interface A03, and at least one network interface A04. The various components in terminal device A00 are coupled together via a bus system. The bus system is used to enable communication between these components. The bus system includes a data bus, a power bus, a control bus, and a status signal bus.

[0193] User interface A03 may include a display, keyboard, or clicking device, such as a mouse, trackball, touchpad, or touchscreen.

[0194] Figures 13-14 Memory 902 and A02 store executable modules or data structures. The memory can store the operating system and application programs. The operating system includes various system programs, such as the framework layer, core library layer, and driver layer, used to implement various basic business functions and handle hardware-based tasks. Application programs include various applications, such as media players and browsers, used to implement various application functions.

[0195] In an embodiment of the present invention, the memory 902 contains a computer program that executes any embodiment of the present application relating to an intermediate node, or the memory A02 contains a computer program that executes any embodiment of the present application relating to a terminal device, the computer program being run on or modified by the processor 901, A01.

[0196] The memory 902, A02 includes a computer-readable storage medium. The processor 901, A01 reads the information in the memory 902, A02 and, in conjunction with its hardware, completes the steps of the above method. Specifically, the computer-readable storage medium stores a computer program, which, when executed by the processor 901, A01, implements the steps of the method embodiment as described in any of the above embodiments.

[0197] Processor 901, A01 may be an integrated circuit chip with signal processing capabilities. In implementation, each step of the method in this application can be completed by the integrated logic circuitry in the hardware of processor 901, A01 or by instructions in software form. The processor 901, A01 can be a general-purpose processor, digital signal processor, application-specific integrated circuit, off-the-shelf programmable gate array or other programmable logic device, discrete gate or transistor logic device, or discrete hardware component. It can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of this invention. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in the embodiments of this invention can be directly manifested as execution by a hardware decoding processor, or execution by a combination of hardware and software modules in the decoding processor.

[0198] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. In a typical configuration, the device of this application includes one or more processors (CPUs), an input / output user interface, a network interface, and memory.

[0199] Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0200] Therefore, this application also proposes a computer-readable medium storing a computer program that, when executed by a processor, implements the steps of the method described in any embodiment of this application. For example, the memory 803, 902, A02 of the present invention may include non-permanent memory in the form of computer-readable medium, random access memory (RAM), and / or non-volatile memory, such as read-only memory (ROM) or flash RAM.

[0201] Computer-readable media includes both permanent and non-permanent, removable and non-removable media that can store information using any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic magnetic disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.

[0202] based on Figures 9-14 In addition to the embodiments described herein, this application also proposes a mobile communication system comprising at least one embodiment of any intermediate node described herein and / or at least one embodiment of any network device described herein. Furthermore, the mobile communication system further comprises at least one embodiment of any terminal device described herein.

[0203] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0204] It should also be noted that the terms "first" and "second" in this application are used to distinguish multiple objects with the same name, and are not used to limit the order or size. Unless otherwise specified, they have no other special meaning.

[0205] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A downlink control channel indication method, used in a wireless communication system, the wireless communication system including a network device, an intermediate node device, and a terminal device; a service signal emitted by the network device is transmitted to the terminal device via the intermediate node device, characterized in that, Determine the first configuration information, which is the physical resource configuration of the dedicated downlink control channel for intermediate nodes; Determine second configuration information, which is used to indicate the physical resource configuration of the terminal's dedicated downlink control channel, wherein the physical resource configuration of one or more dedicated downlink control channels of the terminal is the same as or corresponds to the physical resource configuration of the one or more intermediate nodes' dedicated downlink control channels. Determine a first downlink control signaling, the first downlink control signaling containing indication information of intermediate node channel resources; determine a second downlink control signaling, the second downlink control signaling containing indication information of terminal channel resources; The terminal channel resources are a subset of the intermediate node channel resources.

2. The downlink control channel indication method as described in claim 1, characterized in that, The first configuration information is to configure dedicated downlink control channel physical resources for one or more intermediate nodes, and the downlink control channel physical resource identifier is used to distinguish different distributed intermediate nodes.

3. The downlink control channel indication method as described in claim 1, characterized in that, The first downlink control signaling includes at least intermediate node beam adjustment control information and / or beam adjustment time and frequency resource information; The second downlink control signaling includes at least time-frequency resource information for data transmitted or received by the terminal, and / or beam information for data transmitted or received by the terminal; Wherein, the time and frequency resources indicated by the second downlink control signaling are a subset of the time and frequency resources indicated by the first downlink control signaling; and the beam information indicated by the second downlink control signaling is a subset of the beam information indicated by the first downlink control signaling.

4. The downlink control channel indication method as described in claim 1, characterized in that, The number of bits carried by the first downlink control signaling is the same as the number of bits carried by the second downlink control signaling.

5. The downlink control channel indication method as described in claim 1, characterized in that, It also includes the following steps: HARQ information is determined based on the terminal-specific downlink control channel resource identifier. The HARQ information is used for independent HARQ feedback when multiple distributed nodes forward data to the terminal simultaneously. The terminal-specific downlink control channel resource identifier is the same as or corresponds to the intermediate node-specific downlink control channel resource identifier.

6. The downlink control channel indication method as described in claim 1, characterized in that, The channel resources of the multiple intermediate nodes indicated by the first downlink control signaling overlap, do not overlap, or partially overlap.

7. The downlink control channel indication method as described in claim 1, characterized in that, It also includes the following steps: The downlink data is determined, and the downlink data is transmitted by resources indicated by the second downlink control signaling. The downlink data forwarded by multiple intermediate nodes adopts frequency division multiplexing or time division multiplexing.

8. The downlink control channel indication method as described in claim 1, characterized in that, The first downlink control signaling is scrambled by the intermediate node type identifier or the intermediate node identifier, and the second downlink control signaling is scrambled by the terminal type identifier or the terminal identifier.

9. The downlink control channel indication method as described in any one of claims 1 to 8, used in a network device, characterized in that, Includes the following steps: Determine and send the first configuration information; determine and send the second configuration information.

10. The downlink control channel indication method as described in claim 9, characterized in that, It also includes the following steps: A first downlink control signaling is determined and sent, the first downlink control signaling containing indication information of intermediate node channel resources.

11. The downlink control channel indication method as described in claim 9, characterized in that, It also includes the following steps: A second downlink control signaling is determined and sent, the second downlink control signaling containing indication information of terminal channel resources.

12. The downlink control channel indication method as described in claim 9, characterized in that, It also includes the following steps: data sent by the base station and forwarded by intermediate nodes is scrambled with a dedicated scrambling code associated with the physical resources of the dedicated downlink control channel of the intermediate nodes.

13. The downlink control channel indication method as described in claim 10, characterized in that, The first downlink control signaling is scrambled with an intermediate node type identifier or an intermediate node identifier.

14. The downlink control channel indication method as described in claim 11, characterized in that, The second downlink control signaling is scrambled with the terminal type identifier or the terminal identifier.

15. The downlink control channel indication method as described in claim 9, characterized in that, It also includes the following steps: HARQ information is received, and the HARQ codewords are determined according to the multiple downlink control channel resource identifiers dedicated to the terminal; the multiple downlink control channel resources dedicated to the terminal correspond to the downlink control channel resources dedicated to multiple intermediate nodes.

16. The downlink control channel indication method as described in any one of claims 1 to 8, used in an intermediate node, characterized in that, Includes the following steps: Receive and confirm the first configuration information; receive and forward the second configuration information to the terminal device.

17. The downlink control channel indication method as described in claim 16, characterized in that, It also includes the following steps: Receive and determine a first downlink control signaling, the first downlink control signaling containing indication information of intermediate node channel resources; Forward the second downlink control signaling, which contains indication information of terminal channel resources; The terminal channel resources are a subset of the intermediate node channel resources.

18. The downlink control channel indication method as described in claim 16, characterized in that, It also includes the following steps: Data from network devices is forwarded to the terminal and descrambled using a dedicated scrambling code associated with the physical resources of the dedicated downlink control channel of the intermediate node.

19. The downlink control channel indication method as described in claim 16, characterized in that, It also includes the following steps: Downlink data from network-side devices is forwarded to the terminal. The downlink data is transmitted using resources indicated by the second downlink control signaling. Downlink data from multiple intermediate nodes is multiplexed using frequency division multiplexing or time division multiplexing.

20. The downlink control channel indication method as described in claim 17, characterized in that, The system receives the first downlink control signaling and descrambles it using the intermediate node type identifier or the intermediate node identifier; and / or forwards the second downlink control signaling and scrambles it using the terminal type identifier or the terminal identifier.

21. The downlink control channel indication method as described in any one of claims 1 to 8, used in a terminal device, characterized in that, Includes the following steps: Receive the second configuration information; determine the second configuration information and / or the first configuration information.

22. The downlink control channel indication method as described in claim 21, characterized in that, It also includes the following steps: Receive and determine a second downlink control signaling, the second downlink control signaling containing indication information of terminal channel resources; the terminal channel resources are a subset of the intermediate node channel resources.

23. The downlink control channel indication method as described in claim 22, characterized in that, Receive the second downlink control signaling and descramble it using the terminal identifier or terminal type identifier.

24. The downlink control channel indication method as described in claim 22, characterized in that, Receive and determine downlink data, which is transmitted by resources indicated by the second downlink control signaling, and the downlink data of multiple intermediate nodes adopts frequency division multiplexing or time division multiplexing.

25. The downlink control channel indication method as described in claim 21, characterized in that, HARQ information is sent, and HARQ codewords are determined according to multiple downlink control channel resource identifiers dedicated to the terminal; the multiple downlink control channel resources dedicated to the terminal correspond to multiple downlink control channel resources dedicated to intermediate nodes.

26. A communication device for implementing the method according to any one of claims 1 to 8, characterized in that, At least one module in the communication device is used for at least one of the following functions: determining first configuration information; determining second configuration information; sending the first configuration information; sending the second configuration information; sending a first downlink control signaling to an intermediate node; sending a second downlink control signaling to a terminal via an intermediate node or directly; sending downlink data to a terminal or receiving uplink data via an intermediate node; and receiving HARQ information from a terminal device via an intermediate node or directly.

27. A communication device for implementing the method according to any one of claims 1 to 8, characterized in that, Receive first configuration information; receive second configuration information; determine the first configuration information; determine the second configuration information; receive first downlink control signaling and determine the first downlink control signaling; Forward the second downlink control signaling; forward downlink data from the network device to the terminal device; forward uplink data or HARQ information from the terminal device to the network device.

28. A communication device for implementing the method according to any one of claims 1 to 8, characterized in that, At least one module in the communication device is used for at least one of the following functions: receiving second configuration information; determining the second configuration information; receiving second downlink control signaling; determining the second downlink control signaling; receiving downlink data from an intermediate node; and sending HARQ information.

29. A communication 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, when executed by the processor, implements the steps of the method as described in any one of claims 1 to 23.

30. A computer-readable medium storing a computer program that, when executed by a processor, implements the steps of the method as described in any one of claims 1 to 23.

31. A wireless communication system comprising at least one communication device as described in claim 26, one or more communication devices as described in claim 27, and at least one communication device as described in claim 28.

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