Downlink transmission method and apparatus, storage medium, and electronic device

Abstract

The present disclosure belongs to the technical field of mobile communication, and relates to a downlink transmission method and device, a storage medium and an electronic device. The method comprises the following steps: a first user equipment sends first downlink channel state information to a base station, and a second user equipment sends second downlink channel state information to an intelligent repeater; the second downlink channel state information is determined according to the second downlink channel state information, and the second downlink channel state information is sent to the base station; a downlink transmission configuration is performed on the first user equipment and the second user equipment to obtain first downlink configuration information, and a downlink transmission configuration is performed on the second user equipment to obtain second downlink configuration information; a downlink transmission configuration is performed on the intelligent repeater to obtain third downlink configuration information, and downlink data is issued to the first user equipment and the second user equipment according to the first downlink configuration information, the second downlink configuration information and the third downlink configuration information. The present disclosure obtains complete downlink channel state information to realize downlink transmission in the scene of deploying a repeater.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of mobile communication, and in particular, to a downlink transmission method and device, a computer readable storage medium and an electronic device. BACKGROUND

[0002] A repeater is a common device for coverage expansion in a wireless communication system, from 2G (2-Generation wireless telephone technology) to 5G (5th Generation Mobile Communication Technology) era. The main function of the current RF repeater is to amplify the signal, and no analysis is performed on the signal itself.

[0003] On the one hand, a wireless repeater amplifies only the signal, and thus amplifies noise and interference signals while amplifying the useful signal. On the other hand, in order to improve the spatial degree of freedom of wireless signal transmission, improve the spectrum efficiency and channel capacity of the wireless access network, LTE (Long Term Evolution) proposes a multiple-input multiple-output technology. In the deployment scenario of an intelligent repeater, the following problems exist when the above-mentioned needs are supported in the current 3GPP (3rd Generation Partnership Project) specification: first, the base station cannot obtain complete downlink channel state information between the base station and the terminal; second, the base station cannot issue downlink MU-MIMO (Multi-User Multiple-Input Multiple-Output) configuration for the terminal; and third, the intelligent repeater cannot assist in implementing downlink MU-MIMO transmission.

[0004] In view of this, there is an urgent need in the art to develop a new downlink transmission method and device.

[0005] It should be noted that the information disclosed in the above background section is only used to strengthen the understanding of the background of the present disclosure, and thus can include information that does not constitute prior art known to those of ordinary skill in the art. SUMMARY

[0006] The purpose of the present disclosure is to provide a downlink transmission method, device, computer readable storage medium and electronic device, thereby at least partially overcoming the technical problem that complete downlink channel state information cannot be obtained for downlink MU-MIMO transmission in the scenario of deploying a repeater due to the limitations of the related art.

[0007] Other features and advantages of the present disclosure will be apparent from the following detailed description, or can be learned by practice of the present disclosure.

[0008] According to a first aspect of the embodiments of the present application, a downlink transmission method is provided, which is applied to beam management, and the beam management considers both access link beam management and backhaul link beam management, the access link beam management includes dynamic beam management of the access link, the backhaul link beam management includes dynamic beam management of the backhaul link, the access link is a link between an intelligent repeater and a second user equipment, and the backhaul link is a link between a base station and the intelligent repeater, and the method comprises:

[0009] The first user equipment sends first downlink channel state information to the base station, and the second user equipment sends second downlink channel state information to the intelligent repeater; wherein the first user equipment is outside the coverage of the intelligent repeater, and the second user equipment is within the coverage of the intelligent repeater;

[0010] The intelligent repeater determines the second user equipment meeting the downlink multi-beam transmission condition according to the second downlink channel state information, and generates an intelligent repeater radio network temporary identifier scrambled physical uplink control channel message to send the second downlink channel state information carried by the intelligent repeater radio network temporary identifier scrambled physical uplink control channel message to the base station; wherein the intelligent repeater radio network temporary identifier scrambled physical uplink control channel message contains an uplink control information message, and the uplink control information message includes a terminal identifier and a downlink multi-user multiple-input and multiple-output indication, the terminal identifier uniquely identifies the second user equipment, and the downlink multi-user multiple-input and multiple-output indication suggests to configure downlink multi-user multiple-input and multiple-output for the second user equipment involved;

[0011] The base station performs downlink transmission configuration on the first user equipment and the second user equipment meeting the downlink transmission condition to obtain first downlink configuration information according to the first downlink channel state information and the second downlink channel state information, and performs downlink transmission configuration on the intelligent repeater to obtain third downlink configuration information, and the downlink transmission configuration is beam management configuration; and / or

[0012] The base station performs downlink transmission configuration on the second user equipment meeting the downlink transmission condition to obtain second downlink configuration information according to the second downlink channel state information, and performs downlink transmission configuration on the intelligent repeater to obtain third downlink configuration information, and the downlink transmission configuration is beam management configuration;

[0013] The base station sends downlink data to the first user equipment and the second user equipment meeting the downlink transmission condition according to the first downlink configuration information and the third downlink configuration information, and / or the base station sends downlink data to the second user equipment meeting the downlink transmission condition according to the second downlink configuration information and the third downlink configuration information.

[0014] In an exemplary embodiment of the present application, the first user equipment sends first downlink channel state information to the base station, and the second user equipment sends second downlink channel state information to the intelligent repeater, comprising:

[0015] The base station sends downlink channel measurement configuration information according to terminal capability information of the first user equipment and the second user equipment, and sends the downlink channel measurement configuration information to the first user equipment and the intelligent repeater through a radio resource control message; wherein the downlink channel measurement configuration information comprises resource configuration information of channel state information reference signals and channel state information reporting configuration information, the radio resource control message is a radio resource control reconfiguration message or a radio resource control recovery message, and the radio resource control message comprises terminal identification, channel state information resource configuration, and channel state information reporting configuration.

[0016] The channel state information resource configuration comprises channel state information identification, a channel state information reference signal resource set list, and a resource type, the channel state information reference signal resource set list comprises channel state information interference measurement, non-zero power channel state information reference signals, and synchronization blocks, and the resource type is an enumeration type, comprising three types of periodic, semi-static, and aperiodic, at this time, periodic measurement is taken.

[0017] The channel state information reporting configuration comprises reporting configuration identification, a carrier, channel measurement resources, channel state information interference measurement resources, reporting type configuration, a channel quality indication table, and reporting quality, the reporting configuration identification identifies channel state information reporting configuration, the carrier is a service cell identification, indicating in which service cell the channel state information reporting configuration information is found, the channel measurement resources are channel resource configuration identification, taking an integer between 1 and N, N representing the maximum value of channel state information resource configuration, the channel state information interference measurement resources are used for interference measurement, being channel resource configuration identification, taking an integer between 1 and N, the reporting type configuration comprises three types of periodic, semi-static, and aperiodic, periodicity needs to indicate reporting time slot configuration and a channel state information resource list of a physical uplink control channel, and the reporting quality comprises channel quality indication, recommended precoding matrix indication, layer indication, and rank indication, the recommended precoding matrix indication is a precoding selected from a codebook.

[0018] The intelligent repeater amplifies the downlink channel measurement configuration information and forwards the amplified downlink channel measurement configuration information to the second user equipment;

[0019] The first user equipment measures the channel state information reference signal sent by the base station on the corresponding time-frequency resource according to the downlink channel measurement configuration information, calculates first downlink channel state information, and sends the first downlink channel state information to the base station according to the channel state information reporting configuration; wherein the first downlink channel state information includes terminal identification, channel quality indication, recommended precoding matrix indication, layer indication and rank indication, the terminal identification uniquely identifies a terminal, includes a cell radio network temporary identifier, and the recommended precoding matrix indication includes a precoding selected from a codebook.

[0020] The second user equipment measures the channel state information reference signal sent by the base station on the corresponding time-frequency resource according to the downlink channel measurement configuration information, calculates the second downlink channel state information, and sends the second downlink channel state information to the intelligent repeater through a physical uplink control channel message scrambled by a cell radio network temporary identifier according to the channel state information reporting configuration; wherein the second downlink channel state information includes terminal identification, channel quality indication, recommended precoding matrix indication, layer indication and rank indication, the terminal identification uniquely identifies a terminal, includes a cell radio network temporary identifier, and the recommended precoding matrix indication includes a precoding selected from a codebook.

[0021] In an exemplary embodiment of the present application, before the base station sends the downlink channel measurement configuration information according to the terminal capability information of the first user equipment and the second user equipment, the method further comprises:

[0022] The base station obtains repeater capability information of the intelligent repeater, and sends capability acquisition request information to the first user equipment and the second user equipment; wherein the repeater capability information includes position information, beam configuration information and multi-antenna transmission capability information of the intelligent repeater.

[0023] The first user equipment and the second user equipment return terminal capability information to the base station according to the capability acquisition request; wherein the terminal capability information includes a channel state information reference signal resource set list, a maximum codebook number that can be scheduled by downlink control information, a maximum number of multiple-input multiple-output layers, and a modulation and coding strategy table.

[0024] The channel state information reference signal resource set list indicates a channel state information reference signal list supported by the terminal.

[0025] The maximum codebook quantity that can be scheduled by the downlink control information is an enumeration type;

[0026] The maximum MIMO layer quantity indicates a maximum MIMO layer quantity that can be supported by a partial bandwidth where the physical downlink shared channel is located.

[0027] The modulation and coding strategy table indicates a modulation and coding strategy table available for the physical downlink shared channel.

[0028] In an exemplary embodiment of the present application, the base station configures the first user equipment and the second user equipment meeting the downlink transmission condition for downlink transmission according to the first downlink channel state information and the second downlink channel state information to obtain first downlink configuration information, including:

[0029] Based on the repeater capability information and the terminal capability information, the base station configures the first user equipment and the second user equipment meeting the downlink transmission condition for downlink transmission according to the first downlink channel state information and the second downlink channel state information to obtain first downlink configuration information.

[0030] The base station configures the second user equipment meeting the downlink transmission condition for downlink transmission according to the second downlink channel state information to obtain second downlink configuration information, including:

[0031] Based on the repeater capability information, the base station configures the second user equipment meeting the downlink transmission condition for downlink transmission according to the second downlink channel state information to obtain second downlink configuration information.

[0032] In an exemplary embodiment of the present application, the base station transmits downlink data to the first user equipment and the second user equipment meeting the downlink transmission condition according to the first downlink configuration information and the third downlink configuration information, and / or the base station transmits downlink data to the second user equipment meeting the downlink transmission condition according to the second downlink configuration information and the third downlink configuration information, including:

[0033] The base station sends the first downlink configuration information to the first user equipment and the intelligent repeater, and sends the second downlink configuration information and the third downlink configuration information to the intelligent repeater; the first downlink configuration information is sent to the intelligent repeater and the first user equipment through a cell radio network temporary identifier scrambled physical downlink control channel message, the cell radio network temporary identifier scrambled physical downlink control channel message includes a downlink control information message, the downlink control information message includes precoding information, downlink multiple-input multiple-output layer number, modulation and coding strategy, the precoding information indicates a downlink precoding matrix, the downlink multiple-input multiple-output layer number indicates the number of multiple-input multiple-output layers supported in the partial bandwidth where the physical downlink shared channel is located, and the modulation and coding strategy indicates the physical downlink shared channel resource allocation and the corresponding modulation and coding strategy;

[0034] The second downlink configuration information is sent to the intelligent repeater through a cell radio network temporary identifier scrambled physical downlink control channel message, the cell radio network temporary identifier scrambled physical downlink control channel message includes a downlink control information message, the downlink control information message includes precoding information, downlink multiple-input multiple-output layer number, modulation and coding strategy, the precoding information indicates a downlink precoding matrix, the downlink multiple-input multiple-output layer number indicates the number of multiple-input multiple-output layers supported in the partial bandwidth where the physical downlink shared channel is located, and the modulation and coding strategy indicates the physical downlink shared channel resource allocation and the corresponding modulation and coding strategy;

[0035] The third downlink configuration information is sent to the intelligent repeater through an intelligent repeater radio network temporary identifier scrambled physical downlink control channel message, the intelligent repeater radio network temporary identifier scrambled physical downlink control channel message includes a downlink control information message, the downlink control information message includes terminal identifier and downlink multi-user multiple-input multiple-output precoding matrix, the terminal identifier uniquely identifies the second user equipment through the cell radio network temporary identifier, indicating the second user equipment that needs to perform downlink multi-user multiple-input multiple-output;

[0036] The intelligent repeater saves the third downlink configuration information, and amplifies and sends the first downlink configuration information and the second downlink configuration information to the second user equipment meeting the downlink transmission condition;

[0037] The base station sends downlink data to the first user equipment and the second user equipment meeting the downlink transmission condition according to the first downlink configuration information and the third downlink configuration information, and / or the base station sends downlink data to the second user equipment meeting the downlink transmission condition according to the second downlink configuration information and the third downlink configuration information.

[0038] In an example embodiment of the present application, the base station transmits downlink data to the first user equipment and the second user equipment meeting the downlink transmission condition according to the first downlink configuration information and the third downlink configuration information, and / or the base station transmits downlink data to the second user equipment meeting the downlink transmission condition according to the second downlink configuration information and the third downlink configuration information, comprising:

[0039] The base station transmits downlink data to the intelligent repeater and the first user equipment, and the intelligent repeater determines the second user equipment meeting the downlink transmission condition and involved in the downlink data; wherein the downlink data further comprises a terminal identifier, which uniquely identifies the second user equipment, including a cell radio network temporary identifier;

[0040] The intelligent repeater transmits the downlink data to the second user equipment meeting the downlink transmission condition and involved in the downlink data according to the first downlink configuration information and the third downlink configuration information; and / or

[0041] The intelligent repeater transmits the downlink data to the second user equipment meeting the downlink transmission condition and involved in the downlink data according to the second downlink configuration information and the third downlink configuration information.

[0042] In an example embodiment of the present application, after the base station transmits downlink data to the intelligent repeater and the first user equipment, the method further comprises:

[0043] When the intelligent repeater determines that the downlink data does not involve the second user equipment meeting the downlink transmission condition, the downlink data is amplified and transmitted to the second user equipment.

[0044] According to a second aspect of the embodiments of the present application, a downlink transmission device is provided, which is applied to beam management, the beam management considering beam management of an access link and beam management of a backhaul link at the same time, the beam management of the access link including dynamic beam management of the access link, the beam management of the backhaul link including dynamic beam management of the backhaul link, the access link being a link between an intelligent repeater and a second user equipment, and the backhaul link being a link between a base station and the intelligent repeater, comprising:

[0045] A state acquisition module is configured to transmit first downlink channel state information by a first user equipment to a base station, and transmit second downlink channel state information by a second user equipment to an intelligent repeater; wherein the first user equipment is outside a coverage range of the intelligent repeater, and the second user equipment is inside the coverage range of the intelligent repeater;

[0046] The device recommendation module is configured to determine, by the intelligent repeater, the second user equipment meeting the downlink multi-beam transmission condition according to the second downlink channel state information, and generate an intelligent repeater wireless network temporary identifier scrambled physical uplink control channel message, so as to send the second downlink channel state information carried in the intelligent repeater wireless network temporary identifier scrambled physical uplink control channel message to the base station; wherein the intelligent repeater wireless network temporary identifier scrambled physical uplink control channel message contains an uplink control information message, and the uplink control information message includes a terminal identifier and a downlink multi-user multiple-input and multiple-output indication, the terminal identifier uniquely identifies the second user equipment, and the downlink multi-user multiple-input and multiple-output indication suggests to configure the downlink multi-user multiple-input and multiple-output for the second user equipment involved.

[0047] The downlink configuration module is configured to configure, by the base station, the first user equipment according to the first downlink channel state information to obtain first downlink configuration information, and configure the intelligent repeater according to the first downlink channel state information to obtain third downlink configuration information, wherein the downlink transmission configuration is a beam management configuration.

[0048] The base station configures, according to the second downlink channel state information, the second user equipment meeting the downlink transmission condition to obtain second downlink configuration information, and configures the intelligent repeater to obtain third downlink configuration information, wherein the downlink transmission configuration is a beam management configuration.

[0049] The data transmission module is configured to send, by the base station, downlink data to the first user equipment and the second user equipment meeting the downlink transmission condition according to the first downlink configuration information and the third downlink configuration information, and / or send, by the base station, downlink data to the second user equipment meeting the downlink transmission condition according to the second downlink configuration information and the third downlink configuration information.

[0050] According to a third aspect of the embodiments of the present application, an electronic device is provided, comprising a processor and a memory; wherein the memory has stored thereon computer readable instructions, which, when executed by the processor, implement the downlink transmission method in any of the example embodiments described above.

[0051] According to a fourth aspect of the embodiments of the present application, a computer readable storage medium is provided, which has stored thereon a computer program, which, when executed by a processor, implements the downlink transmission method in any of the example embodiments described above.

[0052] According to the technical solution, the downlink transmission method, the downlink transmission device, the computer storage medium and the electronic device provided by the example embodiments of the present disclosure have at least the following advantages and positive effects:

[0053] In the method and device provided by the example embodiments of the present disclosure, the intelligent repeater can feed back the second downlink channel state information sent by the second user equipment to the base station, help the base station to obtain complete downlink channel state information, and assist in downlink transmission configuration. Further, the base station performs downlink transmission configuration on the first user equipment and the second user equipment according to the first downlink channel state information and / or the second downlink channel state information, and performs downlink transmission configuration on the intelligent repeater, solves the downlink transmission pairing problem between the second user equipment in the intelligent repeater, and also solves the downlink transmission pairing problem between the second user equipment in the intelligent repeater and the first user equipment outside the intelligent repeater, and assists in realizing the downlink multi-user MIMO transmission effect, further improves the spatial multiplexing gain and the downlink transmission performance.

[0054] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0055] The accompanying drawings, which are incorporated into the specification and constitute part of the specification, illustrate embodiments consistent with the present disclosure and, together with the specification, serve to explain the principles of the present disclosure. Obviously, the drawings in the following description are only some embodiments of the present disclosure, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0056] Figure 1 An implementation structure schematic diagram of a wireless repeater is shown;

[0057] Figure 2 A signal amplification effect schematic diagram of a wireless repeater is shown;

[0058] Figure 3 An architecture schematic diagram of an IAB device in the 5G era is shown;

[0059] Figure 4 A data transmission schematic diagram of a radio frequency repeater is shown;

[0060] Figure 5 A data transmission schematic diagram of an intelligent repeater is shown;

[0061] Figure 6 A protocol stack schematic diagram of an intelligent repeater is shown;

[0062] Figure 7 A link structure schematic diagram of an intelligent repeater is shown;

[0063] Figure 8 A structural diagram of a multi-user MIMO system is shown;

[0064] Figure 9 A flow diagram of a downlink transmission method in an example embodiment of the present disclosure is shown schematically;

[0065] Figure 10 A flow diagram of a method for transmitting first and second downlink channel state information in an example embodiment of the present disclosure is shown schematically;

[0066] Figure 11 A flow diagram of a method for obtaining terminal capability information of first and second user equipment in an example embodiment of the present disclosure is shown schematically;

[0067] Figure 12 A flow diagram of a method for downlink transmission configuration by a base station in an example embodiment of the present disclosure is shown schematically;

[0068] Figure 13 A flow diagram of a method for downlink data transmission by a base station in an example embodiment of the present disclosure is shown schematically;

[0069] Figure 14 A flow diagram of a method for further downlink data transmission by a base station in an example embodiment of the present disclosure is shown schematically;

[0070] Figure 15 A flow diagram of a downlink transmission method in an application scenario in an example embodiment of the present disclosure is shown schematically;

[0071] Figure 16 A structural diagram of a downlink transmission apparatus in an example embodiment of the present disclosure is shown schematically;

[0072] Figure 17 An electronic device for implementing a downlink transmission method in an example embodiment of the present disclosure is shown schematically;

[0073] Figure 18 A computer readable storage medium for implementing a downlink transmission method in an example embodiment of the present disclosure is shown schematically. DETAILED DESCRIPTION

[0074] Example implementations are now described with reference to the drawings. Example implementations can, however, be implemented in many different forms and should not be construed as limited to the examples set forth herein; rather, these implementations are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example implementations to those skilled in the art. The features, structures, or characteristics described can be combined in one or more implementations. In the following description, numerous specific details are recited to provide a full understanding of the example implementations. One skilled in the relevant art will recognize, however, that the principles of the present disclosure can be practiced without one or more of the specific details, or indeed, other methods, components, materials, and so forth. In other instances, well-known structures have not been described in detail so as not to unnecessarily obscure the aspects of the present disclosure.

[0075] The use of the terms "one," "a," "an," and "the" in this specification are used to mean that "at least one," "one or more," or "one or more than one" of the enumerated number of an element is present; the use of the terms "first," "second," and the like does not imply an order or ranking but is used for identification purposes only.

[0076] Furthermore, the accompanying drawings are merely ideal representations and are not necessarily drawn to scale. Like reference numerals in the drawings designate like parts throughout the several views thereof, and the repeated description of these parts is omitted for the sake of brevity. Some of the block diagrams in the drawings are functional entities, and do not necessarily correspond to physical or logical independent entities.

[0077] Repeater is a common device for expanding coverage in wireless communication system, from 2G to 5G era. The main role of the current RF repeater is to amplify the signal, and does not do any analysis on the signal itself.

[0078] Figure 1 The implementation structure of the wireless repeater is shown, as shown in Figure 1 The wireless repeater is relatively simple compared to the base station structure. The wireless repeater is composed of antenna, RF duplexer, low noise amplifier, mixer, electrically adjustable attenuator, filter, power amplifier and other components or modules, including uplink and downlink two amplification links.

[0079] Figure 2 The signal amplification effect of the wireless repeater is shown, as shown in Figure 2 The wireless repeater only amplifies the signal, so while amplifying the useful signal, it also amplifies the noise and interference signal.

[0080] In the standard evolution of wireless networks, a variety of coverage expansion devices have been defined, such as Relay devices in the 4G (the 4th generation mobile communication technology) era and IAB (Integrated Access Backhaul) devices in the 5G era.

[0081] Figure 3 An architecture diagram of the IAB device in the 5G era is shown, as shown in Figure 3 These devices all have all layer 1 to layer 3 protocol stacks, and are not transparent to terminals.

[0082] From the perspective of a terminal, the Relay device in the 4G era and the IAB device in the 5G era are both a base station; from the perspective of a base station, the Relay device and the IAB device are both a UE (User Equipment) identity. Therefore, the data transmission of the base station is performed by scheduling the Relay device and the IAB device.

[0083] The 5G standard will introduce a new wireless forwarding device technology, namely Smart Repeater, in Rel-18. As of January 2022, the relevant standardization work has not yet begun, and the Smart Repeater has multiple features compared to the previous RF Repeater.

[0084] First, it supports beamforming for terminals in the coverage area.

[0085] Figure 4 A data transmission diagram of the RF Repeater is shown, as shown in Figure 4 The traditional RF Repeater can only amplify and forward signals and cannot perform beamforming for terminals in the coverage area.

[0086] Figure 5 A data transmission diagram of the Smart Repeater is shown, as shown in Figure 5 The Smart Repeater can support data transmission of user equipment in a beamforming-based manner.

[0087] Second, it supports receiving control information from a macro station.

[0088] Figure 6 A protocol stack diagram of the Smart Repeater is shown, as shown in Figure 6 The Smart Repeater at least needs to have a physical layer protocol stack, so link adjustment between the Repeater and the terminal can be performed based on this.

[0089] Figure 7A schematic diagram of a link structure of an intelligent repeater is shown in FIG. 1. Figure 7 Through the link structure of the repeater, link adjustment can be performed.

[0090] Thirdly, security is supported.

[0091] On the other hand, in order to improve the spatial degrees of freedom of wireless signal transmission, improve the spectral efficiency and channel capacity of the wireless access network, the LTE proposes a multiple-input multiple-output (MIMO) technology.

[0092] NR (New Radio) improves and enhances MIMO on the basis of LTE, including DMRS (Demodulation Reference Signal) design, new CSI (Channel State Information) reporting framework, support for beam management / QCL (Quasi co-location), etc.

[0093] Specifically, MIMO allocates the same time-frequency resources to the same UE for transmitting multiple parallel transmissions.

[0094] Spatial multiplexing (also known as MIMO) supports two modes: single-user MIMO (SU-MIMO) and multi-user (MU-MIMO).

[0095] In SU-MIMO, spatially multiplexed data streams are scheduled to a single user to improve the transmission rate and spectral efficiency of the user.

[0096] In MU-MIMO, spatially multiplexed data streams are scheduled to multiple users, and multiple users share the same time-frequency resources through space division multiplexing.

[0097] Figure 8 A schematic diagram of a multi-user MIMO system is shown in FIG. 2. Figure 8 In the MU-MIMO system, the most common two channels are the multiple access channel (MAC) and the broadcast channel (BS), which correspond to the uplink and downlink channels, respectively.

[0098] Among them, Figure 8 An uplink channel in a multi-user MIMO system is shown in FIG. 3, which refers to a communication channel from multiple users to a base station. The downlink channel refers to a communication channel from the base station to multiple users.

[0099] In the downlink of the MU-MIMO system, the base station transmits information to multiple UEs at the same time, each UE will receive useful information and redundant information transmitted to other UEs at the same time.

[0100] In order to eliminate the interference of redundant information on the UE, a precoding technology is proposed. Specifically, the precoding technology refers to the use of CSI to pre-process and change the signal at the transmitting end under the premise of knowing the complete CSI at the transmitting end, to realize spatial diversity, so that the receiving end can more effectively detect the signal.

[0101] In 3GPP NR, the gNB (NR Node B) first issues a CSI-RS (CSI Reference Signal) resource for measuring channel quality, configures CSI reporting related parameters; then, the UE measures according to the CSI-RS resource issued by the base station, and reports the measurement results according to the Report configuration parameters, such as CRI (CSI-RS Resource Indicator), RI (Rank indicator), PMI (Precoding matrix indicator) and CQI (Channel quality indicator) and the like; finally, the gNB performs downlink MIMO related processing according to the CSI measurement results reported by the UE, such as determining the number of downlink transmission layers and downlink precoder (Precoder) and the like.

[0102] In the scenario with intelligent repeaters, the macro station transmits UE information to the intelligent repeater, which processes it and then forwards it to the served UE. From the perspective of the macro station, the intelligent repeater is a terminal, and from the perspective of the UE, the intelligent repeater is a base station. In order to further improve resource utilization and terminal performance, in the intelligent repeater deployment scenario, there are currently various technical problems when supporting the above-mentioned needs in the 3GPP specification.

[0103] First, the base station cannot obtain complete downlink channel state information between the base station and the terminal.

[0104] In the intelligent repeater deployment scenario, the base station transmits measurement configuration information to the terminal through the intelligent repeater, and the terminal can only measure the downlink channel state between the intelligent repeater and the terminal, and cannot obtain the downlink channel state information between the base station and the intelligent repeater, so it cannot feed back the complete downlink channel state information between the base station and the terminal to the base station.

[0105] Second, the base station cannot issue downlink MU-MIMO configuration for the terminal.

[0106] In the scenario of intelligent repeater deployment, the base station cannot obtain complete downlink channel state information between the base station and the terminal in the intelligent repeater, and therefore cannot pair the downlink MU-MIMO transmission for the terminal in the intelligent repeater, cannot implement the downlink MU-MIMO transmission, and inhibits the improvement of the downlink transmission capacity.

[0107] Thirdly, the intelligent repeater cannot assist in implementing the downlink MU-MIMO transmission.

[0108] Since the downlink data transmitted by the base station needs to be transmitted to the terminal through the intelligent repeater, after the base station configures the downlink MU-MIMO transmission for the terminal according to the previous channel state information, the intelligent repeater cannot transmit the received downlink data to different terminals in the form of downlink MIMO, and therefore cannot implement the downlink MU-MIMO transmission.

[0109] Based on these technical problems, the current 3GPP NR protocol cannot meet the demand, and a new way needs to be used for enhancement to meet the demand of network deployment and optimization.

[0110] In view of the problems in the related art, the present disclosure proposes a downlink transmission method, which is applied to beam management, and the beam management simultaneously considers the beam management of an access link and the beam management of a backhaul link. The beam management of the access link includes dynamic beam management of the access link, and the beam management of the backhaul link includes dynamic beam management of the backhaul link. The access link is a link between the intelligent repeater and the second user equipment, and the backhaul link is a link between the base station and the intelligent repeater. Figure 9 A flowchart of the downlink transmission method is shown, as shown in Figure 9 The downlink transmission method at least includes the following steps:

[0111] Step S910. The first user equipment sends first downlink channel state information to the base station, and the second user equipment sends second downlink channel state information to the intelligent repeater; wherein the first user equipment is outside the coverage range of the intelligent repeater, and the second user equipment is within the coverage range of the intelligent repeater.

[0112] Step S920. The intelligent repeater determines the second user equipment meeting the downlink multi-beam transmission condition according to the second downlink channel state information, and generates a physical uplink control channel message scrambled by the intelligent repeater wireless network temporary identifier, to send the second downlink channel state information carried by the physical uplink control channel message scrambled by the intelligent repeater wireless network temporary identifier to the base station; wherein the physical uplink control channel message scrambled by the intelligent repeater wireless network temporary identifier comprises an uplink control information message, and the uplink control information message includes a terminal identifier and a downlink multi-user multiple-input and multiple-output indication, the terminal identifier uniquely identifies the second user equipment, and the downlink multi-user multiple-input and multiple-output indication suggests to configure the downlink multi-user multiple-input and multiple-output for the second user equipment involved.

[0113] Step S930. The base station performs downlink transmission configuration on the first user equipment and the second user equipment meeting the downlink transmission condition according to the first downlink channel state information and the second downlink channel state information to obtain first downlink configuration information, and performs downlink transmission configuration on the intelligent repeater to obtain third downlink configuration information, and the downlink transmission configuration is beam management configuration; and / or

[0114] The base station performs downlink transmission configuration on the second user equipment meeting the downlink transmission condition according to the second downlink channel state information to obtain second downlink configuration information, and performs downlink transmission configuration on the intelligent repeater to obtain third downlink configuration information, and the downlink transmission configuration is beam management configuration.

[0115] Step S940. The base station transmits downlink data to the first user equipment and the second user equipment meeting the downlink transmission condition according to the first downlink configuration information and the third downlink configuration information, and / or the base station transmits downlink data to the second user equipment meeting the downlink transmission condition according to the second downlink configuration information and the third downlink configuration information.

[0116] In the exemplary embodiments of the present disclosure, the intelligent repeater can feed back the second downlink channel state information sent by the second user equipment to the base station, to help the base station obtain complete downlink channel state information and assist in downlink transmission configuration. Further, the base station performs downlink transmission configuration on the first user equipment and the second user equipment according to the first downlink channel state information and / or the second downlink channel state information, and performs downlink transmission configuration on the intelligent repeater, which solves the downlink transmission pairing problem between the second user equipment in the intelligent repeater and the downlink transmission pairing problem between the second user equipment in the intelligent repeater and the first user equipment outside the intelligent repeater, and assists in achieving the downlink multi-user multiple-input and multiple-output transmission effect, further improves the spatial multiplexing gain and downlink transmission performance.

[0117] The steps of the downlink transmission method are described in detail below.

[0118] In step S910, the first user equipment sends first downlink channel state information to the base station, and the second user equipment sends second downlink channel state information to the smart repeater; wherein, the first user equipment is outside the coverage area of ​​the smart repeater, and the second user equipment is within the coverage area of ​​the smart repeater.

[0119] In an exemplary embodiment of this disclosure, the location where the smart repeater is deployed is fixed.

[0120] In an optional embodiment, Figure 10 A flowchart illustrating the method for transmitting first downlink channel state information and second downlink channel state information is shown, as follows: Figure 10 As shown, the method may include at least the following steps: In step S1010, the base station issues downlink channel measurement configuration information based on the terminal capability information of the first user equipment and the second user equipment, and sends the downlink channel measurement configuration information to the first user equipment and the smart repeater through a radio resource control message; wherein, the downlink channel measurement configuration information includes resource configuration information of the channel state information reference signal and channel state information reporting configuration information, and the radio resource control message is a radio resource control reconfiguration message or a radio resource control recovery message, and the radio resource control message includes terminal identifier, channel state information resource configuration, and channel state information reporting configuration;

[0121] The channel state information resource configuration includes channel state information identifier, channel state information reference signal resource set list, and resource type. The channel state information reference signal resource set list includes channel state information interference measurement, non-zero power channel state information reference signal, and synchronization block. The resource type is an enumerated type, including periodic, semi-static, and aperiodic types. In this case, periodic measurement is taken.

[0122] The channel state information (CSI) reporting configuration includes a reporting configuration identifier, carrier, channel measurement resources, channel state information interference measurement resources, reporting type configuration, channel quality indicator table, and reporting quality. The reporting configuration identifier identifies the CSI reporting configuration. The carrier is the serving cell identifier, indicating which serving cell the CSI reporting configuration information was discovered in. The channel measurement resources are channel resource configuration identifiers, taking integers from 1 to N, where N represents the maximum value of the channel state information resource configuration. The channel state information interference measurement resources are used for interference measurement and are channel resource configuration identifiers, taking integers from 1 to N. The reporting type configuration includes three types: periodic, semi-static, and aperiodic. Periodic configuration requires specifying the reporting time slot configuration and the list of channel state information resources for the physical uplink control channel. The reporting quality includes channel quality indicator, recommended precoding matrix indicator, layer indicator, and rank indicator. The recommended precoding matrix indicator is a precoder selected from the codebook.

[0123] Before the base station issues the downlink channel measurement configuration information according to the terminal capability information of the first user equipment and the second user equipment, the terminal capability information of the first user equipment and the second user equipment can be acquired, and the repeater capability information of the intelligent repeater can be acquired.

[0124] In optional embodiments, Figure 11 A flowchart of a method for acquiring the terminal capability information of the first user equipment and the second user equipment is shown, as shown in Figure 11 The method can at least include the following steps: in step S1110, the base station acquires the repeater capability information of the intelligent repeater, and sends capability acquisition request information to the first user equipment and the second user equipment; wherein the repeater capability information includes the position information, the beam configuration information and the multi-antenna transmission capability information of the intelligent repeater.

[0125] After the intelligent repeater is deployed, the base station can acquire the repeater capability information of the intelligent repeater.

[0126] It is worth noting that since the intelligent repeater is deployed between the base station and the terminal, the beam management of the backhaul link and the beam management of the access link need to be considered at the same time.

[0127] Wherein, the backhaul link is the link between the base station and the intelligent repeater, and the access link is the link between the intelligent repeater and the terminal.

[0128] Wherein, the repeater capability information can include the position information and the related capability configuration information of the intelligent repeater. Further, the related capability configuration information can include the beam configuration information and the multi-antenna transmission capability information of the intelligent repeater, etc., which are not specially limited in the present exemplary embodiments.

[0129] On the other hand, in order to acquire the terminal capability information of the first user equipment and the second user equipment, the base station can also send capability acquisition request information to the first user equipment and the second user equipment.

[0130] In step S1120, the first user equipment and the second user equipment return the terminal capability information to the base station according to the capability acquisition request; wherein the terminal capability information includes the channel state information reference signal resource set list, the maximum codebook quantity that can be scheduled by the downlink control information, the maximum number of multiple-input multiple-output layers, and the modulation and coding strategy table.

[0131] The channel state information reference signal resource set list indicates the channel state information reference signal list supported by the terminal;

[0132] The maximum codebook quantity that can be scheduled by the downlink control information is an enumeration type;

[0133] The maximum MIMO layer number indication indicates a maximum MIMO layer number supported by a part bandwidth where the physical downlink shared channel is located.

[0134] The modulation and coding strategy table indicates a modulation and coding strategy table available for the physical downlink shared channel.

[0135] When the first user equipment and the second user equipment receive the capability acquisition request information sent by the base station, the terminal capability information can be sent to the base station.

[0136] The terminal capability information can include: a channel state information reference signal (CSI-RS) resource set list, used to indicate a CSI-RS list supported by the terminal; a maximum codebook number that can be scheduled by the downlink control information, which can be an enumeration type; a maximum MIMO layer number, used to indicate a maximum MIMO layer number supported by a BWP (Bandwidth part) where the PDSCH (Physical downlink shared channel) is located; a modulation and coding strategy (MCS) table, used to indicate an MCS table available for the PDSCH, etc., which is not specially limited in this example embodiment.

[0137] In this example embodiment, the base station can acquire the terminal capability information of the first user equipment and the second user equipment, and the repeater capability information of the intelligent repeater, which provides data support for the base station to acquire the first downlink channel state information and the second downlink channel state information.

[0138] After the base station acquires the terminal capability information of the first user equipment and the second user equipment, and the repeater capability information of the intelligent repeater, the base station can issue downlink channel measurement configuration information according to the terminal capability information of the first user equipment and the second user equipment.

[0139] When the base station issues the downlink channel measurement configuration information according to the terminal capability information of the first user equipment and the second user equipment, the wireless resource control message can be sent to the first user equipment and the intelligent repeater. The wireless resource control message can include an RRC (Radio Resource Control) reconfiguration message or an RRC recovery message.

[0140] The downlink channel measurement configuration information includes resource configuration information of the reference signal CSI-RS and CSI reporting configuration information.

[0141] The wireless resource control message can include: a terminal identifier, CSI resource configuration, and CSI reporting configuration.

[0142] Specifically, the CSI resource configuration can further include a channel state information identifier, a CSI-RS resource set list, and specifically contains BWP identifiers such as CSI-IM (Channel State Information Interference Measurement), NZP CSI-RS (Non-Zero Power CSI-RS), and SSB (Synchronization Signal / PBCH Block); and can further include a resource type, for example, an enumeration type, containing three types of periodic, semi-static, and aperiodic, at this time, periodic measurement can be taken.

[0143] The CSI reporting configuration can include a reporting configuration identifier to identify the CSI reporting configuration; a channel measurement resource, that is, a channel resource configuration identifier, taking an integer between 1 and N, wherein N represents the maximum value of the CSI resource configuration; a CSI interference measurement resource, which is used for interference measurement channel resource configuration identifier, taking an integer between 1 and N; a reporting type configuration, containing three types of periodic, semi-static, and aperiodic, wherein the periodic needs to indicate the reporting time slot configuration and the PUCCH (Physical Uplink Control Channel) CSI resource list; a CQI table; a reporting quality, including channel quality indication, recommended precoding matrix indication, layer indication, and rank indication, and the recommended precoding matrix indication is a precoding selected from a codebook.

[0144] When the base station issues the downlink channel measurement configuration information according to the terminal capability information of the first user equipment and the second user equipment, the base station can issue the downlink channel measurement configuration information to all user equipment in the coverage range based on the previously saved repeater capability information and the terminal capability information of the first user equipment and the second user equipment.

[0145] Specifically, the base station can send the CSI-RS signal in the downlink channel measurement configuration information to the first user equipment on the corresponding video resource.

[0146] In step S1020, the intelligent repeater amplifies the downlink channel measurement configuration information and forwards the amplified downlink channel measurement configuration information to the second user equipment.

[0147] For the second user equipment in the intelligent repeater, after receiving the CSI-RS signal of the downlink channel measurement configuration information sent by the base station, the intelligent repeater can amplify the downlink channel measurement configuration information and forward the amplified downlink channel measurement configuration information to the second user equipment in the coverage range.

[0148] In step S1030, the first user equipment measures the channel state information reference signal sent by the base station on the corresponding time-frequency resource according to the downlink channel measurement configuration information, and calculates the first downlink channel state information, so as to send the first downlink channel state information to the base station according to the channel state information reporting configuration; wherein the first downlink channel state information comprises: terminal identification, channel quality indication, recommended precoding matrix indication, layer indication and rank indication, the terminal identification uniquely identifies the terminal, and comprises a cell radio network temporary identifier; the recommended precoding matrix indication comprises a precoding selected from a codebook.

[0149] All user equipments under the coverage of the base station measure the CSI-RS on the specific video resource based on the downlink channel measurement configuration information, and report the corresponding CSI parameters.

[0150] Specifically, for the first user equipment not under the coverage of the intelligent repeater, the first user equipment measures the CSI-RS signal sent by the base station on the specific video resource according to the downlink channel measurement configuration information sent by the base station, and calculates the related parameters to obtain the first downlink channel state information.

[0151] Subsequently, the first downlink channel state information is reported according to the CSI, and the CSI related parameters are sent to the base station.

[0152] The first downlink channel state information comprises terminal identification, channel quality indication, recommended precoding matrix indication, layer indication and rank indication.

[0153] Specifically, the terminal identification can uniquely identify the first user equipment, for example, a C-RNTI (Cell Radio Network Temporary Identifier, cell radio network temporary identifier); the precoding matrix indication can be a recommended precoding matrix indication PMI, and can be a precoding selected from a codebook.

[0154] In step S1040, the second user equipment measures the channel state information reference signal sent by the base station on the corresponding time-frequency resource according to the downlink channel measurement configuration information, and calculates the second downlink channel state information, so as to send the second downlink channel state information to the intelligent repeater through the physical uplink control channel message scrambled by the cell radio network temporary identifier according to the channel state information reporting configuration; wherein the second downlink channel state information comprises: terminal identification, channel quality indication, recommended precoding matrix indication, layer indication and rank indication, the terminal identification uniquely identifies the terminal, and comprises a cell radio network temporary identifier; the recommended precoding matrix indication comprises a precoding selected from a codebook.

[0155] All user equipments under the coverage of the base station measure CSI-RS on specific video resources based on downlink channel measurement configuration information and report corresponding CSI parameters.

[0156] Specifically, for the second user equipment under the coverage of the intelligent repeater, the second user equipment measures the CSI-RS signal in the downlink channel measurement configuration information sent by the intelligent repeater on the corresponding video resource to calculate the corresponding CSI-related parameters to obtain the second downlink channel state information.

[0157] Subsequently, the second user equipment reports the second downlink channel state information according to the CSI and sends it to the intelligent repeater through the PUCCH message scrambled by the C-RNTI.

[0158] The second downlink channel state information can include terminal identification, channel quality indication, recommended precoding matrix indication, layer indication, and rank indication.

[0159] Specifically, the terminal identification can uniquely identify the first user equipment, for example, C-RNTI; the recommended precoding matrix indication can be the recommended precoding matrix indication PMI, which can be a precoding selected from a codebook.

[0160] In the present exemplary embodiment, the base station obtains the first downlink channel state information and the second downlink channel state information by issuing the downlink channel measurement configuration information, and the intelligent repeater can feed back the downlink channel state information between the intelligent repeater and the second user equipment fed back by the second user equipment to the base station, helping the base station to obtain complete downlink channel state information and assisting in downlink transmission configuration.

[0161] In step S920, the intelligent repeater determines the second user equipment meeting the downlink multi-beam transmission condition according to the second downlink channel state information, and generates a physical uplink control channel message scrambled by the intelligent repeater wireless network temporary identifier to send the second downlink channel state information carried by the physical uplink control channel message scrambled by the intelligent repeater wireless network temporary identifier to the base station; wherein the physical uplink control channel message scrambled by the intelligent repeater wireless network temporary identifier contains an uplink control information message, and the uplink control information message includes terminal identification and downlink multi-user multiple-input and multiple-output indication, the terminal identification uniquely identifies the second user equipment, and the downlink multi-user multiple-input and multiple-output indication suggests to configure downlink multi-user multiple-input and multiple-output for the second user equipment involved.

[0162] In the exemplary embodiments of the present disclosure, considering that the wireless environment between the intelligent repeater and the base station can dynamically change in the intelligent repeater deployment scenario, in order to obtain higher gain, adaptive dynamic beam management needs to be performed on the backhaul link.

[0163] On the other hand, considering the movement of the terminal, the wireless link between the terminal and the smart repeater also dynamically changes, and therefore, dynamic beam management is required for the access link.

[0164] Therefore, in order to realize dynamic beam management, the channel condition can be measured through a channel state information reference signal channel.

[0165] When the smart repeater receives multiple PUCCH messages scrambled by C-RNTI reported by multiple second user equipment at the same time or in a short time interval, the second channel state information is obtained by parsing.

[0166] Further, the position information of the second user equipment is combined to determine whether the corresponding second user equipment meets the downlink multi-beam transmission, i.e., the MU-MIMO condition. If it meets the condition, the smart repeater can recommend to the base station to configure the corresponding second user equipment for downlink MU-MIMO, and generate a new PUCCH message scrambled by SR-RNTI (Smart Repeater Radio Network Temporary Identifier, smart repeater radio network temporary identifier), which is sent to the base station together with the PUCCH message scrambled by C-RNTI reported by the second user equipment, so that the base station receives the second downlink channel state information.

[0167] Specifically, the new PUCCH message scrambled by SR-RNTI contains a newly defined UCI (Uplink Control Information, uplink control information) message, which can include: terminal identification and DL MU-MIMO (DownLink MU-MIMO, downlink multi-user multiple input and multiple output) indication.

[0168] The terminal identification can uniquely identify the second user equipment, and the DL MU-MIMO indication suggests to configure the involved terminal for downlink DL MU-MIMO.

[0169] In step S930, the base station configures the first user equipment for downlink transmission according to the first downlink channel state information to obtain first downlink configuration information, and configures the smart repeater for downlink transmission to obtain third downlink configuration information, and the downlink transmission configuration is a beam management configuration; and / or

[0170] The base station configures the second user equipment that meets the downlink transmission condition for downlink transmission according to the second downlink channel state information to obtain second downlink configuration information, and configures the smart repeater for downlink transmission to obtain third downlink configuration information, and the downlink transmission configuration is a beam management configuration.

[0171] In the exemplary embodiments of the present disclosure, after the base station receives the downlink channel CSI information under the coverage of the second user equipment feedback, the downlink channel CSI information (including the channel state information parameters sent by the terminal and the smart repeater) feedback by the first user equipment outside the smart repeater, and the downlink multi-beam transmission (downlink MU-MIMO) indication sent by the smart repeater, the base station analyzes the channel state information between the smart repeater and the base station, the channel state information between the terminal and the smart repeater, the repeater capability information and the terminal capability information by receiving the feedback information of the smart repeater, and can perform MU-MIMO pairing on the first user equipment and the second user equipment involved.

[0172] In optional embodiments, Figure 12 A flowchart of a method for downlink transmission configuration of a base station is shown, as Figure 12 shown, the method can at least include the following steps: in step S1210, based on the repeater capability information and the terminal capability information, the base station performs downlink transmission configuration on the first user equipment and the second user equipment meeting the downlink transmission condition according to the first downlink channel state information and the second downlink channel state information to obtain first downlink configuration information.

[0173] If the base station performs downlink transmission configuration on the second user equipment in the smart repeater and the first user equipment outside the smart repeater, the base station performs downlink transmission configuration on the first user equipment and the second user equipment meeting the downlink transmission condition based on the smart repeater and the first user equipment to obtain the first downlink configuration information.

[0174] Specifically, the base station performs pre-coding calculation on the data to be sent based on the accurate first downlink channel state information and the second downlink channel state information, so as to send data to multiple terminals through the same time-frequency resource information. Since multiple user equipments use the same time-frequency resource, there is interference between them, therefore, the base station selects the paired user equipments with less interference between each other for downlink MU-MIMO transmission configuration.

[0175] The first downlink configuration information includes downlink pre-coding related information.

[0176] In step S1220, based on the repeater capability information, the base station performs downlink transmission configuration on the second user equipment meeting the downlink transmission condition according to the second downlink channel state information to obtain second downlink configuration information.

[0177] If the base station performs downlink transmission configuration on the second user equipment in the smart repeater, the base station performs downlink transmission configuration on the second user equipment in the smart repeater based on the repeater capability information of the smart repeater, such as the number of antenna ports, to obtain the second downlink configuration information.

[0178] Specifically, the second downlink configuration information includes downlink precoding matrix and number of transmission layers, etc. In the present exemplary embodiment, the base station configures downlink transmission according to the first downlink channel state information and the second downlink channel state information in consideration of the repeater capability information and the terminal capability information, thereby providing support for downlink MU-MIMO transmission to the second user equipment in the smart repeater, and providing support for MU-MIMO transmission to the second user equipment in the smart repeater and the first user equipment outside the smart repeater.

[0179] In addition, considering that the downlink data issued by the base station needs to be sent to the second user equipment through the smart repeater, in order to realize downlink MU-MIMO transmission, the base station needs to issue MU-MIMO configuration information, i.e. third downlink configuration information, to the smart repeater in consideration of the capability of the smart repeater, in addition to sending the second downlink configuration information for the second user equipment to the smart repeater through the DCI message.

[0180] In step S940, the base station issues downlink data to the first user equipment and the second user equipment meeting the downlink transmission condition according to the first downlink configuration information and the third downlink configuration information, and / or the base station issues downlink data to the second user equipment meeting the downlink transmission condition according to the second downlink configuration information and the third downlink configuration information.

[0181] In the exemplary embodiment of the present disclosure, the base station can issue downlink data according to the first downlink configuration information, the second downlink configuration information and the third downlink configuration information.

[0182] In an optional embodiment, Figure 13 A flowchart of a method for the base station to issue downlink data is shown, as shown in Figure 13 The method can at least include the following steps: in step S1310, the base station sends the first downlink configuration information to the first user equipment and the smart repeater, and sends the second downlink configuration information and the third downlink configuration information to the smart repeater, the first downlink configuration information is sent to the smart repeater and the first user equipment through a physical downlink control channel message scrambled by a cell radio network temporary identifier, the physical downlink control channel message includes a downlink control information message, the downlink control information message includes precoding information, downlink multiple-input multiple-output layer number, modulation and coding strategy, the precoding information indicates a downlink precoding matrix, the downlink multiple-input multiple-output layer number indicates the number of supported multiple-input multiple-output layers in the partial bandwidth where the physical downlink shared channel is located, and the modulation and coding strategy indicates the physical downlink shared channel resource allocation and the corresponding modulation and coding strategy;

[0183] The second downlink configuration information is sent to the smart repeater through a cell radio network temporary identifier scrambled physical downlink control channel message, the cell radio network temporary identifier scrambled physical downlink control channel message includes a downlink control information message, the downlink control information message includes precoding information, downlink multiple-input multiple-output layer number, modulation and coding strategy, the precoding information indicates a downlink precoding matrix, the downlink multiple-input multiple-output layer number indicates a multiple-input multiple-output layer number supported in a physical downlink shared channel part bandwidth, and the modulation and coding strategy indicates physical downlink shared channel resource allocation and corresponding modulation and coding strategy.

[0184] The third downlink configuration information is sent to the smart repeater through a smart repeater radio network temporary identifier scrambled physical downlink control channel message, the smart repeater radio network temporary identifier scrambled physical downlink control channel message includes a downlink control information message, the downlink control information message includes terminal identification and downlink multi-user multiple-input multiple-output precoding matrix, the terminal identification uniquely identifies the second user equipment through a cell radio network temporary identifier, and indicates the second user equipment needing to perform downlink MU-MIMO multi-user multiple-input multiple-output.

[0185] Specifically, after the base station configures the first downlink configuration information, the base station sends a cell radio network temporary identifier scrambled physical downlink control channel message to the smart repeater and the first user equipment. Specifically, the cell radio network temporary identifier scrambled physical downlink control channel message contains a newly defined downlink control information message (DCI), which contains but is not limited to: precoding information: indicating a downlink precoding matrix; downlink MIMO layer number: indicating a MIMO layer number supported in a PDSCH (Physical downlink shared channel) BWP; MCS: indicating PDSCH resource allocation and corresponding MCS.

[0186] After the base station configures the second downlink configuration information, the base station sends a C-RNTI scrambled PDCCH message, that is, the second downlink configuration information to the smart repeater.

[0187] The base station sends a Physical Downlink Control Channel (PDCCH) message scrambled with the Cell Radio Network Temporary Identifier (NRDI) to the intelligent repeater. This PDCCH message includes a newly defined DCI message, which includes, but is not limited to: precoding information (indicating the downlink precoding matrix); downlink MIMO layer number (indicating the number of MIMO layers supported in the BWP where the PDSCH resides); and MCS (indicating the PDSCH resource allocation and the corresponding MCS). After obtaining the third downlink configuration information, the base station generates an SR-RNTI scrambled PDCCH message and sends it to the intelligent repeater.

[0188] Specifically, the SR-RNTI scrambled PDCCH message includes a DCI message, which includes, but is not limited to: a terminal identifier, which uniquely identifies the terminal through a temporary identifier of the cell radio network, indicating the terminal that needs to perform downlink MU-MIMO transmission; and a downlink MU-MIMO precoding matrix.

[0189] In step S1320, the intelligent repeater saves the third downlink configuration information, and amplifies the first downlink configuration information and the second downlink configuration information before sending them to the second user equipment that meets the downlink transmission conditions.

[0190] After receiving the second and third downlink configuration information from the base station, the intelligent repeater can save the third downlink configuration information contained in the SR-RNTI scrambled PDCCH message. Furthermore, it amplifies the second downlink configuration information contained in the C-RNTI scrambled PDCCH message and sends it to the corresponding second user equipment.

[0191] In step S1330, the base station sends downlink data to the first user equipment and the second user equipment that meets the downlink transmission conditions according to the first downlink configuration information and the third downlink configuration information, and / or the base station sends downlink data to the second user equipment that meets the downlink transmission conditions according to the second downlink configuration information and the third downlink configuration information.

[0192] In an optional embodiment, Figure 14 The flowchart illustrates the method by which the base station further transmits downlink data, as shown below. Figure 14 As shown, the method may include at least the following steps: In step S1410, the base station sends downlink data to the smart repeater and the first user equipment, and the smart repeater determines the second user equipment involved in the downlink data and that meets the downlink transmission conditions; wherein, the downlink data also includes a terminal identifier, which uniquely identifies the second user equipment, including a temporary identifier of the cell wireless network.

[0193] The base station transmits the downlink data according to the first downlink configuration information, the second downlink configuration information and the third downlink configuration information, and forwards the downlink data to the intelligent repeater and the first user equipment respectively.

[0194] The downlink data can include terminal identification and downlink data, or other contents, which are not limited in the example embodiment.

[0195] The terminal identification can uniquely identify the terminal, and can be C-RNTI.

[0196] After receiving the downlink data forwarded by the base station, the intelligent repeater can detect whether the downlink data contains the second user equipment for downlink transmission configuration.

[0197] When the downlink data involves the second user equipment for downlink transmission configuration, it can be determined that the user equipment is involved in the downlink data at this time, and itself meets the downlink transmission condition.

[0198] In step S1420, the intelligent repeater transmits the downlink data to the second user equipment involved in the downlink data and meeting the downlink transmission condition according to the first downlink configuration information and the third downlink configuration information, and / or the intelligent repeater transmits the downlink data to the second user equipment involved in the downlink data and meeting the downlink transmission condition according to the second downlink configuration information and the third downlink configuration information.

[0199] When the base station transmits the downlink data to the first user equipment outside the coverage of the intelligent repeater and the second user equipment within the coverage of the intelligent repeater, after determining the second user equipment involved in the downlink data and meeting the downlink transmission condition, the downlink data can be transmitted to the second user equipment in the form of downlink MU-MIMO transmission, so that the second user equipment receives the downlink data.

[0200] When the base station transmits the downlink data to the second user equipment within the coverage of the intelligent repeater, after determining the second user equipment involved in the downlink data and meeting the downlink transmission condition, the downlink data can be transmitted to the second user equipment in the form of downlink MU-MIMO transmission, so that the second user equipment receives the downlink data.

[0201] In addition, the intelligent repeater can also determine in the downlink data that all the second user equipment meeting the downlink transmission condition are not involved in the downlink data, at this time, the downlink data can be normally forwarded.

[0202] In the optional embodiment, when the intelligent repeater determines that the downlink data does not involve the second user equipment meeting the downlink transmission condition, the downlink data is amplified, and the amplified downlink data is transmitted to the second user equipment.

[0203] When the downlink data does not involve the second user equipment configured for downlink transmission, the downlink sentence can be directly amplified, and the amplified downlink data is forwarded to all second user equipments under the coverage of the intelligent repeater.

[0204] After the second user equipment receives the corresponding downlink data, the first downlink channel state information and the second downlink state information can also be periodically analyzed and fed back to dynamically adjust the downlink transmission configuration. The downlink precoding indication information is carried.

[0205] In the present exemplary embodiment, the first downlink configuration information, the second downlink configuration information and the third downlink configuration information obtained according to the downlink transmission configuration can realize the transmission of the downlink data. In this process, the intelligent repeater assists in realizing the downlink MU-MIMO transmission based on the third downlink configuration information configured by the base station, and the downlink MU-MIMO transmission mode has little effect on the first user equipment and the second user equipment, has good backward compatibility and deployment feasibility. In addition, the downlink MU-MIMO transmission mode enhances the existing protocol, has little change to the existing protocol, and has low implementation difficulty.

[0206] The downlink transmission method in the embodiment of the present disclosure will be described in detail in combination with an application scenario.

[0207] Figure 15 The flowchart of the downlink transmission method in the application scenario is shown as Figure 15 The downlink transmission method can include two application scenarios. One is the downlink MU-MIMO transmission of the terminal in the intelligent repeater; the other is the downlink MU-MIMO transmission of the terminal in the intelligent repeater and the terminal outside the intelligent repeater.

[0208] In step S1510, the base station sends downlink channel measurement configuration information according to the terminal capability information of the first user equipment and the second user equipment, and sends the downlink channel measurement configuration information to the first user equipment and the intelligent repeater through a radio resource control message; wherein the downlink channel measurement configuration information includes resource configuration information of channel state information reference signal and channel state information reporting configuration information, the radio resource control message is a radio resource control reconfiguration message or a radio resource control recovery message, and the radio resource control message includes terminal identification, channel state information resource configuration, and channel state information reporting configuration;

[0209] The channel state information resource configuration includes channel state information identification, channel state information reference signal resource set list, and resource type, the channel state information reference signal resource set list includes channel state information interference measurement, non-zero power channel state information reference signal and synchronization block, and the resource type is an enumeration type, including periodic, semi-static and aperiodic, at this time, the periodic measurement is taken.

[0210] The channel state information reporting configuration includes a reporting configuration identifier, a carrier, a channel measurement resource, a channel state information interference measurement resource, a reporting type configuration, a channel quality indicator table, and a reporting quality. The reporting configuration identifier identifies the channel state information reporting configuration. The carrier is a service cell identifier, which indicates in which service cell the channel state information reporting configuration information is found. The channel measurement resource is a channel resource configuration identifier, which is an integer between 1 and N, where N represents the maximum value of the channel state information resource configuration. The channel state information interference measurement resource is used for interference measurement and is a channel resource configuration identifier, which is an integer between 1 and N. The reporting type configuration includes periodicity, semi-static, and aperiodic. The periodicity needs to indicate the reporting time slot configuration and the channel state information resource list of the physical uplink control channel. The reporting quality includes the channel quality indicator, the recommended precoding matrix indicator, the layer indicator, and the rank indicator. The recommended precoding matrix indicator is a precoding selected from a codebook.

[0211] The first user equipment is UE1 and UE2 under the coverage of the intelligent repeater.

[0212] Before the base station sends the downlink channel measurement configuration information according to the terminal capability information of the first user equipment and the second user equipment, the terminal capability information of the first user equipment and the second user equipment can be obtained, and the repeater capability information of the intelligent repeater can be obtained.

[0213] The base station obtains the repeater capability information of the intelligent repeater, and sends the capability obtaining request information to the first user equipment and the second user equipment. The repeater capability information includes the position information, the beam configuration information, and the multi-antenna transmission capability information of the intelligent repeater.

[0214] After the intelligent repeater is deployed, the base station can obtain the repeater capability information of the intelligent repeater.

[0215] The repeater capability information can include the position information and the related capability configuration information of the intelligent repeater. Further, the related capability configuration information can include the antenna configuration and the multi-antenna transmission capability of the intelligent repeater, which is not specially limited in the example embodiment.

[0216] On the other hand, in order to obtain the terminal capability information of the first user equipment and the second user equipment, the base station can also send the capability obtaining request information to the first user equipment and the second user equipment.

[0217] The first user equipment and the second user equipment return the terminal capability information to the base station according to the capability obtaining request.

[0218] After the first user equipment and the second user equipment receive the capability obtaining request information sent by the base station, the terminal capability information can be sent to the base station.

[0219] The terminal capability information can include: a channel state information reference signal (CSI-RS) resource set list, used to indicate a CSI-RS list supported by the terminal; a maximum codebook quantity that can be scheduled by downlink control information, which can be an enumerated type; a maximum MIMO layer quantity, used to indicate a maximum MIMO layer quantity supported by a BWP where the PDSCH is located; a modulation and coding strategy (MCS) table, used to indicate a PDSCH available MCS table, and the like, which are not specially limited in this example embodiment.

[0220] After the base station acquires the terminal capability information of the first user equipment and the second user equipment and the repeater capability information of the intelligent repeater, the base station can issue downlink channel measurement configuration information according to the terminal capability information of the first user equipment and the second user equipment.

[0221] When the base station issues the downlink channel measurement configuration information according to the terminal capability information of the first user equipment and the second user equipment, the wireless resource control message can be sent to the first user equipment and the intelligent repeater. The wireless resource control message can include an RRC reconfiguration message or an RRC recovery message.

[0222] The downlink channel measurement configuration information includes resource configuration information of a reference signal CSI-RS and CSI reporting configuration information.

[0223] The wireless resource control message can include: a terminal identifier, CSI resource configuration, and CSI reporting configuration.

[0224] Specifically, the CSI resource configuration can further include a CSI-RS resource set list, specifically including BWP identifiers of CSI-IM, NZP CSI-RS, and SSB; and can further include a resource type, for example, an enumerated type, including three types of periodic, semi-static, and aperiodic, at which time periodic measurement can be taken.

[0225] The CSI reporting configuration can include a reporting configuration identifier, used to identify the CSI reporting configuration; a channel measurement resource, that is, a channel resource configuration identifier, taking an integer between 1 and N, where N represents a maximum value of the CSI resource configuration; a CSI interference measurement resource, used for an interference measurement channel resource configuration identifier, taking an integer between 1 and N; a reporting type configuration, including three types of periodic, semi-static, and aperiodic, where the periodic needs to indicate a reporting time slot configuration and a PUCCH CSI resource list; a CQI table; a reporting quality, including a channel quality indicator, a recommended precoding matrix indicator, a layer indicator, and a rank indicator, and a recommended precoding matrix indicator is a precoding selected from a codebook.

[0226] When the base station issues the downlink channel measurement configuration information according to the terminal capability information of the first user equipment and the second user equipment, the downlink channel measurement configuration information can be issued to all user equipment in the coverage range based on the repeater capability information previously saved by the base station and the terminal capability information of the first user equipment and the second user equipment.

[0227] Specifically, the base station can send the CSI-RS signal in the downlink channel measurement configuration information to the first user equipment on the corresponding video resource.

[0228] The intelligent repeater amplifies the downlink channel measurement configuration information and forwards the amplified downlink channel measurement configuration information to the second user equipment.

[0229] For the second user equipment in the intelligent repeater, after receiving the CSI-RS signal of the downlink channel measurement configuration information sent by the base station, the intelligent repeater can amplify the downlink channel measurement configuration information and forward the amplified downlink channel measurement configuration information to the second user equipment in the coverage range.

[0230] In step S1520, the first user equipment measures the channel state information reference signal issued by the base station on the corresponding time-frequency resource according to the downlink channel measurement configuration information, and calculates the first downlink channel state information to send the first downlink channel state information to the base station according to the channel state information reporting configuration.

[0231] The first downlink channel state information includes terminal identification, channel quality indication, precoding matrix indication, layer indication and rank indication.

[0232] All user equipment under the coverage of the base station measures the CSI-RS on the specific video resource based on the downlink channel measurement configuration information, and reports the corresponding CSI parameters.

[0233] Specifically, for the first user equipment not under the coverage of the intelligent repeater, the first user equipment measures the CSI-RS signal issued by the base station on the specific video resource according to the downlink channel measurement configuration information issued by the base station, and calculates the related parameters to obtain the first downlink channel state information.

[0234] Subsequently, the first downlink channel state information is reported according to the CSI, and the CSI related parameters are sent to the base station.

[0235] The first downlink channel state information includes terminal identification, channel quality indication, precoding matrix indication, layer indication and rank indication.

[0236] Specifically, the terminal identification can uniquely identify the first user equipment, for example, C-RNTI; the precoding matrix indication can be the recommended precoding matrix indication PMI, which can be a precoding selected from a codebook.

[0237] The second user equipment measures the channel state information reference signal transmitted by the base station on the corresponding time-frequency resource according to the downlink channel measurement configuration information, and calculates the second downlink channel state information to report to the intelligent repeater according to the channel state information reporting configuration, and sends the second downlink channel state information to the intelligent repeater through the physical uplink control channel message scrambled by the cell radio network temporary identifier; wherein the second downlink channel state information includes: terminal identifier, channel quality indicator, precoding matrix indicator, layer indicator and rank indicator.

[0238] All user equipments under the coverage of the base station measure the CSI-RS on the specific video resource based on the downlink channel measurement configuration information, and report the corresponding CSI parameters.

[0239] Specifically, for the second user equipment under the coverage of the intelligent repeater, the second user equipment measures the CSI-RS signal in the downlink channel measurement configuration information transmitted by the intelligent repeater on the corresponding video resource to calculate the corresponding CSI related parameters to obtain the second downlink channel state information.

[0240] Subsequently, the second user equipment reports the second downlink channel state information according to the CSI, and sends it to the intelligent repeater through the PUCCH message scrambled by the C-RNTI.

[0241] The second downlink channel state information can include: terminal identifier, channel quality indicator, precoding matrix indicator, layer indicator and rank indicator.

[0242] Specifically, the terminal identifier can uniquely identify the first user equipment, for example, C-RNTI; the precoding matrix indicator can be the recommended precoding matrix indicator PMI, which can be a precoding selected from a codebook.

[0243] In step S1530, the intelligent repeater sends a DL MU-MIMO indication to the base station, and recommends the second user equipment meeting the downlink transmission condition to the base station.

[0244] The intelligent repeater determines the second user equipment meeting the downlink multi-beam transmission condition according to the second downlink channel state information, and generates the physical uplink control channel message scrambled by the intelligent repeater radio network temporary identifier to send the second downlink channel state information carried by the physical uplink control channel message scrambled by the intelligent repeater radio network temporary identifier to the base station; wherein the physical uplink control channel message scrambled by the intelligent repeater radio network temporary identifier contains the uplink control information message, and the uplink control information message includes terminal identifier, downlink multi-user multiple-input and multiple-output indication, the terminal identifier uniquely identifies the second user equipment, and the downlink multi-user multiple-input and multiple-output indication suggests to configure the downlink multi-user multiple-input and multiple-output for the second user equipment involved.

[0245] Considering that the wireless environment between the smart repeater and the base station can dynamically change in the smart repeater deployment scenario, in order to obtain higher gain, adaptive dynamic beam management needs to be performed on the backhaul link.

[0246] On the other hand, considering the movement of the terminal, the wireless link between the terminal and the smart repeater also dynamically changes, and therefore, dynamic beam management needs to be performed on the access link.

[0247] Therefore, in order to implement dynamic beam management, the channel condition can be measured through a channel state information reference signal channel.

[0248] When the smart repeater receives multiple PUCCH messages scrambled by C-RNTI reported by the second user equipment at the same time or at a very short time interval, the second channel state information is obtained by analysis.

[0249] Further, the position information of the second user equipment is combined to determine whether the corresponding second user equipment meets the downlink MU-MIMO condition. If it meets the condition, the smart repeater can recommend to the base station to configure the downlink MU-MIMO for the corresponding second user equipment, and generate a new PUCCH message scrambled by SR-RNTI, which is sent to the base station together with the PUCCH message scrambled by C-RNTI reported by the second user equipment, so that the base station receives the second downlink channel state information.

[0250] Specifically, the PUCCH message scrambled by SR-RNTI can include: terminal identification and DL MU-MIMO indication.

[0251] The terminal identification can uniquely identify the second user equipment, and the DL MU-MIMO indication suggests to configure the downlink DL MU-MIMO for the terminal involved.

[0252] In step S1540, the base station pairs the first user equipment and the second user equipment involved in the DL MU-MIMO.

[0253] The base station configures the first user equipment according to the first downlink channel state information to obtain first downlink configuration information, and configures the smart repeater to obtain third downlink configuration information, and the downlink transmission configuration is beam management configuration; and / or

[0254] The base station configures the second user equipment that meets the downlink transmission condition according to the second downlink channel state information to obtain second downlink configuration information, and configures the smart repeater to obtain third downlink configuration information, and the downlink transmission configuration is beam management configuration.

[0255] After the base station receives the first downlink channel state information fed back by the first user equipment and the second downlink channel state information fed back by the second user equipment, the base station comprehensively analyzes the first downlink channel state information, the second downlink channel state information, the repeater capability information and the terminal capability information to perform MU-MIMO pairing for the first user equipment and the second user equipment involved.

[0256] Based on the repeater capability information and the terminal capability information, the base station performs downlink transmission configuration for the first user equipment and the second user equipment in accordance with the first downlink channel state information and the second downlink channel state information to obtain first downlink configuration information.

[0257] If the base station performs downlink transmission configuration for the second user equipment in the smart repeater and the first user equipment outside the smart repeater, the base station performs downlink transmission configuration for the first user equipment and the second user equipment in accordance with the repeater capability information and the terminal capability information to obtain first downlink configuration information.

[0258] Specifically, the base station performs precoding calculation on the data to be transmitted based on the accurate first downlink channel state information and the second downlink channel state information, so as to transmit the data to multiple terminals through the same time-frequency resource information. Since multiple user equipments use the same time-frequency resource, there is interference between them, and therefore, the base station selects paired user equipments with less interference between them to perform downlink MU-MIMO transmission configuration.

[0259] The first downlink configuration information includes downlink precoding related information.

[0260] Based on the repeater capability information, the base station performs downlink transmission configuration for the second user equipment in accordance with the second downlink channel state information to obtain second downlink configuration information.

[0261] If the base station performs downlink transmission configuration for the second user equipment in the smart repeater, the base station performs downlink transmission configuration for the second user equipment in the smart repeater in consideration of the repeater capability information of the smart repeater, such as the number of antenna ports, to obtain the second downlink configuration information.

[0262] Specifically, the second downlink configuration information includes a downlink precoding matrix and the number of transmission layers.

[0263] Considering that the downlink data issued by the base station needs to be sent to the second user equipment through the intelligent repeater, in order to realize the downlink MU-MIMO transmission, in addition to sending the second downlink configuration information for the second user equipment to the intelligent repeater through the PDCCH message, the base station also needs to issue the MU-MIMO configuration information for the intelligent repeater on the basis of considering the capability of the intelligent repeater, that is, the third downlink configuration information.

[0264] Further, the base station can issue the downlink data according to the first downlink configuration information and the third downlink configuration information, and / or issue the downlink data to the second user equipment meeting the downlink transmission condition according to the second downlink configuration information and the third downlink configuration information.

[0265] The base station sends the first downlink configuration information to the first user equipment and the intelligent repeater, and sends the second downlink configuration information and the third downlink configuration information to the intelligent repeater.

[0266] Specifically, after the base station configures the first downlink configuration information, the base station sends the PDCCH message scrambled by the first user identifier (C-RNTI) to the intelligent repeater and the first user equipment respectively, and specifically, the message includes but is not limited to: precoding information, downlink MIMO layer number and MCS.

[0267] The precoding information indicates the downlink precoding matrix; the downlink MIMO layer number indicates the number of MIMO layers supported in the BWP where the PDSCH is located; and the MCS indicates the PDSCH resource allocation and the corresponding MCS.

[0268] After the base station configures the second downlink configuration information, the base station sends the PDCCH message scrambled by the C-RNTI, that is, the second downlink configuration information to the intelligent repeater.

[0269] Therefore, the second downlink configuration information can include: precoding information, downlink MIMO layer number and MCS.

[0270] The precoding information indicates the downlink precoding matrix; the downlink MIMO layer number indicates the number of MIMO layers supported in the BWP where the PDSCH is located; and the MCS indicates the PDSCH resource allocation and the corresponding MCS.

[0271] After the base station configures the third downlink configuration information, the base station generates a PDCCH message scrambled by an SR-RNTI and sends it to the intelligent repeater.

[0272] Specifically, the third downlink configuration information included in the PDCCH message scrambled by the SR-RNTI can include: terminal identifier and downlink MU-MIMO precoding matrix.

[0273] The terminal identifier uniquely identifies the terminal through C-RNTI, and indicates the terminal requiring downlink MU-MIMO transmission; and the downlink MU-MIMO precoding matrix is a downlink MIMO transmission precoding matrix.

[0274] In step S1550, the intelligent repeater saves the third downlink configuration information.

[0275] After receiving the second downlink configuration information and the third downlink configuration information sent by the base station, the intelligent repeater can save the third downlink configuration information contained in the SR-RNTI scrambled PDCCH message.

[0276] In step S1560, the intelligent repeater amplifies and sends the first downlink configuration information and the second downlink configuration information to the second user equipment meeting the downlink transmission condition.

[0277] The intelligent repeater amplifies and sends the second downlink configuration information contained in the C-RNTI scrambled PDCCH message to the corresponding second user equipment, so that the base station transmits the downlink data to the first user equipment and the second user equipment meeting the downlink transmission condition according to the first downlink configuration information, the second downlink configuration information and the third downlink configuration information.

[0278] The base station transmits the downlink data to the intelligent repeater and the first user equipment, and the intelligent repeater determines the second user equipment meeting the downlink transmission condition involved in the downlink data.

[0279] The base station transmits the downlink data according to the first downlink configuration information and the third downlink configuration information, and forwards the downlink data to the intelligent repeater and the first user equipment, and / or transmits the downlink data to the second user equipment meeting the downlink transmission condition according to the second downlink configuration information and the third downlink configuration information.

[0280] The downlink data can include terminal identifier and downlink data, or other contents, which are not specially limited in the example embodiment.

[0281] The terminal identifier can uniquely identify the terminal, and can be C-RNTI.

[0282] After receiving the downlink data forwarded by the base station, the intelligent repeater can detect whether the second user equipment for downlink transmission configuration is contained in the downlink data.

[0283] When the second user equipment for downlink transmission configuration is involved in the downlink data, it can be determined that the user equipment is involved in the downlink data at this time, and itself meets the downlink transmission condition.

[0284] The intelligent repeater transmits the downlink data to the second user equipment involved in the downlink data and meeting the downlink transmission condition according to the first downlink configuration information and the third downlink configuration information, and / or the intelligent repeater transmits the downlink data to the second user equipment involved in the downlink data and meeting the downlink transmission condition according to the second downlink configuration information and the third downlink configuration information.

[0285] After the second user equipment involved in the downlink data and meeting the downlink transmission condition is determined, the downlink data is transmitted to the second user equipment in the form of downlink MU-MIMO transmission, so that the second user equipment receives the downlink data.

[0286] In addition, the intelligent repeater can also determine in the downlink data that all the second user equipment meeting the downlink transmission condition are not involved in the downlink data, at which time the downlink data can be normally forwarded.

[0287] When the intelligent repeater determines that the downlink data does not involve the second user equipment meeting the downlink transmission condition, the downlink data is amplified, and the amplified downlink data is transmitted to the second user equipment.

[0288] When the downlink data does not involve the second user equipment configured for downlink transmission, the downlink data can be directly amplified, and the amplified downlink data is forwarded to all the second user equipment covered by the intelligent repeater.

[0289] After the corresponding downlink data is received by the second user equipment, the first downlink channel state information and the second downlink channel state information can also be periodically analyzed and fed back to dynamically adjust the downlink transmission configuration. The downlink precoding indication information is carried.

[0290] In the downlink transmission method in this application scenario, the intelligent repeater can feed back the second downlink channel state information transmitted by the second user equipment to the base station, help the base station obtain complete downlink channel state information, and assist in downlink transmission configuration. Further, the base station configures the first user equipment and the second user equipment for downlink transmission according to the first downlink channel state information and / or the second downlink channel state information, and configures the intelligent repeater for downlink transmission, which solves the downlink transmission pairing problem between the second user equipment in the intelligent repeater and the downlink transmission pairing problem between the second user equipment in the intelligent repeater and the first user equipment outside the intelligent repeater, and assists in realizing the downlink multi-user multiple-input multiple-output transmission effect, further improves the spatial multiplexing gain and the downlink transmission performance.

[0291] In addition, the impact on the terminal is small, and there is good backward compatibility and deployment feasibility. The downlink transmission method in this application scenario is enhanced on the existing protocol, and the change to the existing protocol is small, and the implementation difficulty is low.

[0292] Figure 16 A structural diagram of the downlink transmission device is shown as Figure 16 The downlink transmission device 1600 is applied to beam management, which simultaneously considers beam management of an access link and beam management of a backhaul link, the beam management of the access link includes dynamic beam management of the access link, the beam management of the backhaul link includes dynamic beam management of the backhaul link, the access link is a link between the intelligent repeater and the second user equipment, and the backhaul link is a link between the base station and the intelligent repeater, and can include: a state acquisition module 1610, a device recommendation module 1620, a downlink configuration module 1630, and a data transmission module 1640. Wherein:

[0293] The state acquisition module 1610 is configured to send first downlink channel state information from the first user equipment to the base station, and send second downlink channel state information from the second user equipment to the intelligent repeater; wherein the first user equipment is outside the coverage range of the intelligent repeater, and the second user equipment is within the coverage range of the intelligent repeater;

[0294] The device recommendation module 1620 is configured to determine the second user equipment that meets the downlink multi-beam transmission condition according to the second downlink channel state information, and generate a physical uplink control channel message scrambled by an intelligent repeater wireless network temporary identifier, so as to send the second downlink channel state information carried by the physical uplink control channel message scrambled by the intelligent repeater wireless network temporary identifier to the base station, and send the second downlink channel state information to the base station; wherein the physical uplink control channel message scrambled by the intelligent repeater wireless network temporary identifier contains an uplink control information message, the uplink control information message includes a terminal identifier and a downlink multi-user multiple-input and multiple-output indication, the terminal identifier uniquely identifies the second user equipment, and the downlink multi-user multiple-input and multiple-output indication suggests to configure downlink multi-user multiple-input and multiple-output for the second user equipment involved;

[0295] The downlink configuration module 1630 is configured to configure the first user equipment according to the first downlink channel state information to obtain first downlink configuration information, configure the intelligent repeater to obtain third downlink configuration information, and the downlink transmission configuration is a beam management configuration; and / or

[0296] According to the second downlink channel state information, the second user equipment that meets the downlink transmission condition is configured to obtain second downlink configuration information, the intelligent repeater is configured by the base station to obtain third downlink configuration information, and the downlink transmission configuration is a beam management configuration;

[0297] The data transmission module 1640 is configured to cause the base station to send downlink data to the first user equipment and the second user equipment meeting the downlink transmission condition according to the first downlink configuration information and the third downlink configuration information, and / or cause the base station to send downlink data to the second user equipment meeting the downlink transmission condition according to the second downlink configuration information and the third downlink configuration information.

[0298] In an exemplary embodiment of the present application, the first user equipment sends first downlink channel state information to the base station, and the second user equipment sends second downlink channel state information to the intelligent repeater.

[0299] The base station sends downlink channel measurement configuration information to the first user equipment and the intelligent repeater according to terminal capability information of the first user equipment and the second user equipment, and sends the downlink channel measurement configuration information to the first user equipment and the intelligent repeater through a radio resource control message; wherein the downlink channel measurement configuration information comprises resource configuration information of channel state information reference signals and channel state information reporting configuration information, the radio resource control message is a radio resource control reconfiguration message or a radio resource control recovery message, and the radio resource control message comprises terminal identification, channel state information resource configuration, and channel state information reporting configuration.

[0300] The channel state information resource configuration comprises channel state information identification, a channel state information reference signal resource set list, and a resource type, the channel state information reference signal resource set list comprises channel state information interference measurement, non-zero power channel state information reference signals, and synchronization blocks, and the resource type is an enumeration type, comprising periodic, semi-static, and aperiodic, in which case periodic measurement is taken.

[0301] The channel state information reporting configuration comprises reporting configuration identification, a carrier, channel measurement resources, channel state information interference measurement resources, reporting type configuration, a channel quality indication table, and reporting quality, the reporting configuration identification identifies channel state information reporting configuration, the carrier is a serving cell identification, indicating a serving cell in which channel state information reporting configuration information is found, the channel measurement resources are channel resource configuration identification, taking an integer between 1 and N, N representing a maximum value of channel state information resource configuration, the channel state information interference measurement resources are used for interference measurement and are channel resource configuration identification, taking an integer between 1 and N, the reporting type configuration comprises periodic, semi-static, and aperiodic, periodicity needs to indicate reporting time slot configuration and a channel state information resource list of a physical uplink control channel, and the reporting quality comprises channel quality indication, recommended pre-coding matrix indication, layer indication, and rank indication, the recommended pre-coding matrix indication is a pre-coding selected from a codebook.

[0302] The intelligent repeater amplifies the downlink channel measurement configuration information and forwards the amplified downlink channel measurement configuration information to the second user equipment;

[0303] The first user equipment measures the channel state information reference signal sent by the base station on the corresponding time-frequency resource according to the downlink channel measurement configuration information, calculates first downlink channel state information, and sends the first downlink channel state information to the base station; wherein the first downlink channel state information includes terminal identification, channel quality indication, recommended precoding matrix indication, layer indication and rank indication, the terminal identification uniquely identifies a terminal and includes a cell radio network temporary identifier, and the recommended precoding matrix indication includes a precoding selected from a codebook.

[0304] The second user equipment measures the channel state information reference signal sent by the base station on the corresponding time-frequency resource according to the downlink channel measurement configuration information, calculates the second downlink channel state information, and sends the second downlink channel state information to the intelligent repeater through a physical uplink control channel message scrambled by a cell radio network temporary identifier according to channel state information reporting configuration; wherein the second downlink channel state information includes terminal identification, channel quality indication, recommended precoding matrix indication, layer indication and rank indication, the terminal identification uniquely identifies a terminal and includes a cell radio network temporary identifier, and the recommended precoding matrix indication includes a precoding selected from a codebook.

[0305] In an exemplary embodiment of the present application, before the base station sends downlink channel measurement configuration information according to terminal capability information of the first user equipment and the second user equipment, the method further comprises:

[0306] The base station obtains repeater capability information of the intelligent repeater, and sends capability acquisition request information to the first user equipment and the second user equipment; wherein the repeater capability information includes position information, beam configuration information and multi-antenna transmission capability information of the intelligent repeater.

[0307] The first user equipment and the second user equipment return terminal capability information to the base station according to the capability acquisition request; wherein the terminal capability information includes a channel state information reference signal resource set list, a maximum codebook number that can be scheduled by downlink control information, a maximum number of multiple-input multiple-output layers, and a modulation and coding strategy table.

[0308] The channel state information reference signal resource set list indicates a channel state information reference signal list supported by a terminal.

[0309] The maximum codebook number that can be scheduled by the downlink control information is an enumeration type.

[0310] The maximum MIMO layer number indicates a maximum MIMO layer number supported by a part bandwidth where the PDSCH is located.

[0311] The modulation and coding strategy table indicates a modulation and coding strategy table available for the PDSCH.

[0312] In an exemplary embodiment of the present application, the base station configures the first user equipment and the second user equipment meeting the downlink transmission condition according to the first downlink channel state information and the second downlink channel state information to obtain first downlink configuration information, including:

[0313] Based on the repeater capability information and the terminal capability information, the base station configures the first user equipment and the second user equipment meeting the downlink transmission condition according to the first downlink channel state information and the second downlink channel state information to obtain first downlink configuration information.

[0314] The base station configures the second user equipment meeting the downlink transmission condition according to the second downlink channel state information to obtain second downlink configuration information, including:

[0315] Based on the repeater capability information, the base station configures the second user equipment meeting the downlink transmission condition according to the second downlink channel state information to obtain second downlink configuration information.

[0316] In an exemplary embodiment of the present application, the base station transmits downlink data to the first user equipment and the second user equipment meeting the downlink transmission condition according to the first downlink configuration information and the third downlink configuration information, and / or the base station transmits downlink data to the second user equipment meeting the downlink transmission condition according to the second downlink configuration information and the third downlink configuration information, including:

[0317] The base station sends the first downlink configuration information to the first user equipment and the intelligent repeater, and sends the second downlink configuration information and the third downlink configuration information to the intelligent repeater; the first downlink configuration information is sent to the intelligent repeater and the first user equipment through a cell radio network temporary identifier scrambled physical downlink control channel message, the cell radio network temporary identifier scrambled physical downlink control channel message includes a downlink control information message, the downlink control information message includes precoding information, downlink multiple-input multiple-output layer number, modulation and coding strategy, the precoding information indicates a downlink precoding matrix, the downlink multiple-input multiple-output layer number indicates the number of multiple-input multiple-output layers supported in the partial bandwidth where the physical downlink shared channel is located, and the modulation and coding strategy indicates the physical downlink shared channel resource allocation and the corresponding modulation and coding strategy;

[0318] The second downlink configuration information is sent to the intelligent repeater through a cell radio network temporary identifier scrambled physical downlink control channel message, the cell radio network temporary identifier scrambled physical downlink control channel message includes a downlink control information message, the downlink control information message includes precoding information, downlink multiple-input multiple-output layer number, modulation and coding strategy, the precoding information indicates a downlink precoding matrix, the downlink multiple-input multiple-output layer number indicates the number of multiple-input multiple-output layers supported in the partial bandwidth where the physical downlink shared channel is located, and the modulation and coding strategy indicates the physical downlink shared channel resource allocation and the corresponding modulation and coding strategy;

[0319] The third downlink configuration information is sent to the intelligent repeater through an intelligent repeater radio network temporary identifier scrambled physical downlink control channel message, the intelligent repeater radio network temporary identifier scrambled physical downlink control channel message includes a downlink control information message, the downlink control information message includes terminal identifier and downlink multi-user multiple-input multiple-output precoding matrix, the terminal identifier uniquely identifies the second user equipment through the cell radio network temporary identifier, indicating the second user equipment that needs to perform downlink multi-user multiple-input multiple-output;

[0320] The intelligent repeater saves the third downlink configuration information, and amplifies and sends the first downlink configuration information and the second downlink configuration information to the second user equipment meeting the downlink transmission condition;

[0321] The base station transmits downlink data to the first user equipment and the second user equipment meeting the downlink transmission condition according to the first downlink configuration information and the third downlink configuration information, and / or the base station transmits downlink data to the second user equipment meeting the downlink transmission condition according to the second downlink configuration information and the third downlink configuration information.

[0322] In an exemplary embodiment of the present application, the base station transmits downlink data to the first user equipment and the second user equipment meeting the downlink transmission condition according to the first downlink configuration information and the third downlink configuration information, and / or the base station transmits downlink data to the second user equipment meeting the downlink transmission condition according to the second downlink configuration information and the third downlink configuration information, comprising:

[0323] The base station transmits downlink data to the intelligent repeater and the first user equipment, and the intelligent repeater determines the second user equipment meeting the downlink transmission condition and involved in the downlink data; wherein the downlink data further comprises a terminal identifier, and the terminal identifier uniquely identifies the second user equipment, including a cell radio network temporary identifier;

[0324] The intelligent repeater transmits the downlink data to the second user equipment meeting the downlink transmission condition and involved in the downlink data according to the first downlink configuration information and the third downlink configuration information; and / or

[0325] The intelligent repeater transmits the downlink data to the second user equipment meeting the downlink transmission condition and involved in the downlink data according to the second downlink configuration information and the third downlink configuration information.

[0326] In an exemplary embodiment of the present application, after the base station transmits downlink data to the intelligent repeater and the first user equipment, the method further comprises:

[0327] When the intelligent repeater determines that the downlink data does not involve the second user equipment meeting the downlink transmission condition, the intelligent repeater amplifies the downlink data and transmits the amplified downlink data to the second user equipment.

[0328] The specific details of the above downlink transmission device 1600 have been described in detail in the corresponding downlink transmission method, and therefore will not be described here.

[0329] It should be noted that although several modules or units of the downlink transmission device 1600 are mentioned in the foregoing detailed description, such division is not mandatory. In fact, according to the embodiments of the present application, the features and functions of two or more modules or units described above can be embodied in one module or unit. Conversely, the features and functions of one module or unit described above can be further divided into multiple modules or units.

[0330] In addition, in an exemplary embodiment of the present application, an electronic device capable of implementing the above method is also provided.

[0331] The following will be described with reference to Figure 17The electronic device 1700 according to this embodiment of the present application will be described. Figure 17 The electronic device 1700 shown is merely one example and should not be taken as limiting the scope of the present application embodiments.

[0332] As shown in Figure 17 The electronic device 1700 is in the form of a general computing device. Components of the electronic device 1700 can include, but are not limited to, the at least one processing unit 1710 described above, the at least one storage unit 1720 described above, a bus 1730 that connects the various system components including the storage unit 1720 and the processing unit 1710, and a display unit 1740.

[0333] The storage unit stores program code that can be executed by the processing unit 1710 such that the processing unit 1710 performs the steps described above in the "Exemplary Methods" section of this specification according to various exemplary embodiments of the present application.

[0334] The storage unit 1720 can include a readable medium in the form of volatile storage such as random access memory (RAM) 1721 and / or cache memory 1722, and can further include non-volatile storage such as read-only memory (ROM) 1723.

[0335] The storage unit 1720 can also include program / utility 1724 having a set of at least one program modules 1725, including but not limited to, operating system, one or more application programs, other program modules, and program data, and each of these examples, or some combination thereof, can include implementation of a network environment.

[0336] The bus 1730 can be representative of one or more of several types of bus structures, including a storage bus or storage controller, a peripheral bus, a graphics acceleration port, a processor or local bus using any of a variety of bus structures, and the like.

[0337] The electronic device 1700 can also communicate with one or more external devices 1900 such as a keyboard, a pointing device, a Bluetooth device, etc.; and one or more devices that enable a user to interact with the electronic device 1700; and / or one or more devices that enable the electronic device 1700 to communicate with one or more other computing devices. Such communication can be via an input / output (I / O) interface 1750. Further, the electronic device 1700 can communicate with one or more networks, such as a local area network (LAN), a wide area network (WAN), and / or the public network, such as the Internet, via a network adapter 1760. As depicted, the network adapter 1760 is in communication with the other modules of the electronic device 1700 through the bus 1730. As will be appreciated by persons skilled in the art, a computer can also include other modules that can or can not be shared with other computing devices. For example, as illustrated in Figure 17, the electronic device 1700 also includes an interface bus 1714 for facilitating communication between the general purpose

[0338] From the above description of the embodiments, it is easy for those skilled in the art to understand that the example embodiments described herein can be implemented by software, or by a combination of software and necessary hardware. Therefore, the technical solutions according to the embodiments of the present disclosure can be embodied in the form of a software product. The software product can be stored in a non-volatile storage medium (which can be a CD-ROM, a USB flash disk, a mobile hard disk, or the like) or a network, and includes a number of instructions to enable a computing device (which can be a personal computer, a server, a terminal device, or a network device, etc.) to perform the methods according to the embodiments of the present disclosure.

[0339] In the example embodiments of the present disclosure, a computer readable storage medium is also provided, on which a program product capable of implementing the above-mentioned method of the present disclosure is stored. In some possible embodiments, various aspects of the present disclosure can also be implemented in the form of a program product, which includes program codes for causing a terminal device to perform the steps described in the above-mentioned “example method” section according to various example embodiments of the present disclosure when the program product is run on the terminal device.

[0340] Reference Figure 18 As shown, a program product 1800 for implementing the above-mentioned method according to the embodiments of the present disclosure is described, which can take the form of a portable compact disc read-only memory (CD-ROM) and include program codes, and can be run on a terminal device, such as a personal computer. However, the program product of the present disclosure is not limited to this, and in this document, the readable storage medium can be any tangible medium containing or storing a program, which can be used or combined with an instruction execution system, device, or apparatus.

[0341] The program product can employ any combination of one or more computer readable media or storage media. A computer readable medium or storage medium can be, for example, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. More specific examples (a non-exhaustive list) of the computer readable medium or storage medium include the following: an electrical connection having one or more wires, a portable disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or Flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0342] A computer readable signal medium can include a propagated data signal with computer readable program code embodied therein. The propagated data signal can take any of a variety of forms, including but not limited to electro-magnetic, optical, or any suitable combination thereof. A computer readable signal medium can be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport program code for use by or in connection with an instruction execution system, apparatus, or device.

[0343] Program code embodied on a computer readable medium can be transmitted using any appropriate medium, including but not limited to wireless, wired, optical fiber cable, RF, etc., or any suitable combination of the foregoing.

[0344] Program code for carrying out operations of the present application can be written in any combination of one or more programming languages, including an object oriented programming language such as Java, C++, or the like, and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code can execute entirely on the user's computing device, partly on the user's computing device, as a stand-alone software package, partly on the user's computing device and partly on a remote computing device or entirely on the remote computing device or server. In the latter scenario, the remote computing device can be connected to the user's computing device through any type of network, including a local area network (LAN) or a wide area network (WAN), or the connection can be made to an external computing device, such as through the Internet using an Internet Service Provider. The application is related to the use of computer system 100 for online analytics, online training, and online training management. Any of the embodiments of the present application can employ a computer system 100 for these purposes.

[0345] Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the features disclosed herein. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

Claims

1. A downlink transmission method, characterized in that, The method is applied to beam management, which simultaneously considers beam management of access links and beam management of backhaul links. The beam management of access links includes dynamic beam management of the access links, and the beam management of backhaul links also includes dynamic beam management of the backhaul links. The access link is a link between a smart repeater and a second user equipment, and the backhaul link is a link between a base station and a smart repeater. The method includes: A first user equipment sends a first downlink channel state information to a base station, and a second user equipment sends a second downlink channel state information to a smart repeater; wherein, the first user equipment is outside the coverage area of ​​the smart repeater, and the second user equipment is within the coverage area of ​​the smart repeater; The intelligent repeater determines the second user equipment that meets the downlink multi-beam transmission conditions based on the second downlink channel state information, and generates a physical uplink control channel message scrambled with the intelligent repeater wireless network temporary identifier, so as to send the second downlink channel state information carried in the physical uplink control channel message scrambled with the intelligent repeater wireless network temporary identifier to the base station; wherein, the physical uplink control channel message scrambled with the intelligent repeater wireless network temporary identifier includes an uplink control information message, the uplink control information message includes a terminal identifier and a downlink multiple user multiple inputs and multiple outputs indication, the terminal identifier uniquely identifies the second user equipment, and the downlink multiple user multiple inputs and multiple outputs indication suggests configuring downlink multiple user multiple inputs and multiple outputs for the involved second user equipment; The base station performs downlink transmission configuration on the first user equipment and the second user equipment meeting the downlink transmission conditions based on the first downlink channel state information and the second downlink channel state information to obtain first downlink configuration information. The base station performs downlink transmission configuration on the intelligent repeater to obtain third downlink configuration information. The downlink transmission configuration is beam management configuration; and / or The base station performs downlink transmission configuration on the second user equipment that meets the downlink transmission conditions according to the second downlink channel state information to obtain second downlink configuration information, and the base station performs downlink transmission configuration on the intelligent repeater to obtain third downlink configuration information, wherein the downlink transmission configuration is beam management configuration; The base station sends downlink data to the first user equipment and the second user equipment that meets the downlink transmission conditions according to the first downlink configuration information and the third downlink configuration information, and / or the base station sends downlink data to the second user equipment that meets the downlink transmission conditions according to the second downlink configuration information and the third downlink configuration information.

2. The downlink transmission method according to claim 1, characterized in that, The first user equipment sends first downlink channel state information to the base station, and the second user equipment sends second downlink channel state information to the intelligent repeater, including: The base station issues downlink channel measurement configuration information based on the terminal capability information of the first user equipment and the second user equipment, and sends the downlink channel measurement configuration information to the first user equipment and the intelligent repeater via a radio resource control message; wherein, the downlink channel measurement configuration information includes resource configuration information for channel state information reference signals and channel state information reporting configuration information, and the radio resource control message is a radio resource control reconfiguration message or a radio resource control recovery message, and the radio resource control message includes terminal identifier, channel state information resource configuration, and channel state information reporting configuration; The channel state information resource configuration includes a channel state information identifier, a channel state information reference signal resource set list, and resource types. The channel state information reference signal resource set list includes channel state information interference measurement, non-zero power channel state information reference signal, and synchronization block. The resource types are enumerated types, including periodic, semi-static, and aperiodic types. In this case, periodic measurement is selected. The channel state information reporting configuration includes a reporting configuration identifier, carrier, channel measurement resources, channel state information interference measurement resources, reporting type configuration, channel quality indicator table, and reporting quality. The reporting configuration identifier identifies the channel state information reporting configuration. The carrier is a serving cell identifier, indicating which serving cell the channel state information reporting configuration information is found in. The channel measurement resources are channel resource configuration identifiers, taking integers from 1 to N, where N represents the maximum value of the channel state information resource configuration. The channel state information interference measurement resources are used for interference measurement and are channel resource configuration identifiers, taking integers from 1 to N. The reporting type configuration includes three types: periodic, semi-static, and aperiodic. Periodic requires specifying the reporting time slot configuration and the channel state information resource list of the physical uplink control channel. The reporting quality includes a channel quality indicator, a recommended precoding matrix indicator, a layer indicator, and a rank indicator. The recommended precoding matrix indicator is a precoder selected from the codebook. The intelligent repeater amplifies the downlink channel measurement configuration information and forwards the amplified downlink channel measurement configuration information to the second user equipment; The first user equipment measures the channel state information reference signal transmitted by the base station on the corresponding time-frequency resources according to the downlink channel measurement configuration information, and calculates the first downlink channel state information, so as to send the first downlink channel state information to the base station according to the channel state information reporting configuration; wherein, the first downlink channel state information includes: terminal identifier, channel quality indicator, recommended precoding matrix indicator, layer indicator and rank indicator, the terminal identifier uniquely identifies the terminal and includes a cell radio network temporary identifier, and the recommended precoding matrix indicator includes a precoding selected from the codebook; The second user equipment measures the channel state information reference signal transmitted by the base station on the corresponding time-frequency resources according to the downlink channel measurement configuration information, and calculates the second downlink channel state information. It then reports the configuration based on the channel state information and sends the second downlink channel state information to the intelligent repeater via a physical uplink control channel message scrambled with a cell radio network temporary identifier. The second downlink channel state information includes: a terminal identifier, a channel quality indicator, a recommended precoding matrix indicator, a layer indicator, and a rank indicator. The terminal identifier uniquely identifies the terminal and includes a cell radio network temporary identifier. The recommended precoding matrix indicator includes a precoder selected from a codebook.

3. The downlink transmission method according to claim 2, characterized in that, Before the base station sends downlink channel measurement configuration information based on the terminal capability information of the first user equipment and the second user equipment, the method further includes: The base station acquires the repeater capability information of the intelligent repeater and sends capability acquisition request information to the first user equipment and the second user equipment; wherein, the repeater capability information includes the location information, beam configuration information and multi-antenna transmission capability information of the intelligent repeater; The first user equipment and the second user equipment return terminal capability information to the base station according to the capability acquisition request; wherein, the terminal capability information includes a channel state information reference signal resource set list, the maximum number of codebooks that can be scheduled by downlink control information, the maximum number of multiple input multiple output layers, and a modulation and coding strategy table; The list of channel state information reference signals indicates the list of channel state information reference signals supported by the terminal. The maximum number of codebooks that the downlink control information can schedule is an enumeration type; The maximum number of multiple input multiple output layers indicates the maximum number of multiple input multiple output layers that can be supported by the bandwidth of the portion of the physical downlink shared channel. The modulation and coding strategy table indicates the available modulation and coding strategy tables for the physical downlink shared channel.

4. The downlink transmission method according to claim 3, characterized in that, The base station performs downlink transmission configuration on the first user equipment and the second user equipment that meets the downlink transmission conditions based on the first downlink channel state information and the second downlink channel state information to obtain first downlink configuration information, including: Based on the repeater capability information and the terminal capability information, the base station performs downlink transmission configuration on the first user equipment and the second user equipment that meets the downlink transmission conditions according to the first downlink channel state information and the second downlink channel state information to obtain the first downlink configuration information; The base station performs downlink transmission configuration on the second user equipment that meets the downlink transmission conditions based on the second downlink channel state information to obtain second downlink configuration information, including: Based on the repeater capability information, the base station performs downlink transmission configuration on the second user equipment that meets the downlink transmission conditions according to the second downlink channel state information to obtain the second downlink configuration information.

5. The downlink transmission method according to claim 1, characterized in that, The base station transmits downlink data to the first user equipment and the second user equipment that meets the downlink transmission conditions according to the first downlink configuration information and the third downlink configuration information, and / or the base station transmits downlink data to the second user equipment that meets the downlink transmission conditions according to the second downlink configuration information and the third downlink configuration information, including: The base station sends the first downlink configuration information to the first user equipment and the intelligent repeater, and sends the second downlink configuration information and the third downlink configuration information to the intelligent repeater; the first downlink configuration information is sent to the intelligent repeater and the first user equipment via a Physical Downlink Control Channel (PLC) message scrambled with a Cell Radio Network Temporary Identifier (CRTI). The PLC message scrambled with the CRTI includes downlink control information messages, which include precoding information, downlink MIMO layer number, and modulation and coding strategy. The precoding information indicates the downlink precoding matrix, the downlink MIMO layer number indicates the number of MIMO layers supported in the bandwidth of the physical downlink shared channel, and the modulation and coding strategy indicates the physical downlink shared channel resource allocation and the corresponding modulation and coding strategy. The second downlink configuration information is sent to the intelligent repeater via a Physical Downlink Control Channel (PDC) message scrambled with a cell radio network temporary identifier. The PDC message scrambled with the cell radio network temporary identifier includes a downlink control information message, which includes precoding information, downlink multiple-input multiple-output (MIMO) layer number, and modulation and coding strategy. The precoding information indicates the downlink precoding matrix, the downlink multiple-input multiple-output (MIMO) layer number indicates the number of MIMO layers supported in the bandwidth of the physical downlink shared channel, and the modulation and coding strategy indicates the physical downlink shared channel resource allocation and the corresponding modulation and coding strategy. The third downlink configuration information is sent to the smart repeater through a physical downlink control channel message scrambled with a temporary identifier of the smart repeater wireless network. The physical downlink control channel message scrambled with a temporary identifier of the smart repeater wireless network includes a downlink control information message. The downlink control information message includes a terminal identifier and a downlink multi-user multiple-input multiple-output precoding matrix. The terminal identifier uniquely identifies the second user equipment through a temporary identifier of the cell wireless network, indicating the second user equipment that needs to perform downlink multi-user multiple-input multiple-output. The intelligent repeater saves the third downlink configuration information, and amplifies the first downlink configuration information and the second downlink configuration information before sending them to the second user equipment that meets the downlink transmission conditions; The base station sends downlink data to the first user equipment and the second user equipment that meets the downlink transmission conditions according to the first downlink configuration information and the third downlink configuration information, and / or the base station sends downlink data to the second user equipment that meets the downlink transmission conditions according to the second downlink configuration information and the third downlink configuration information.

6. The downlink transmission method according to claim 5, characterized in that, The base station transmits downlink data to the first user equipment and the second user equipment that meets the downlink transmission conditions according to the first downlink configuration information and the third downlink configuration information, and / or the base station transmits downlink data to the second user equipment that meets the downlink transmission conditions according to the second downlink configuration information and the third downlink configuration information, including: The base station sends downlink data to the smart repeater and the first user equipment. The smart repeater identifies the second user equipment involved in the downlink data and that meets the downlink transmission conditions. The downlink data also includes a terminal identifier, which uniquely identifies the second user equipment and includes a temporary identifier for the cell wireless network. The intelligent repeater transmits the downlink data to the second user equipment involved in the downlink data and meeting the downlink transmission conditions according to the first downlink configuration information and the third downlink configuration information; and / or The intelligent repeater sends the downlink data to the second user equipment that is involved in the downlink data and meets the downlink transmission conditions, according to the second downlink configuration information and the third downlink configuration information.

7. The downlink transmission method according to claim 6, characterized in that, After the base station sends downlink data to the smart repeater and the first user equipment, the method further includes: When the intelligent repeater determines that the downlink data does not involve the second user equipment that meets the downlink transmission conditions, it amplifies the downlink data and sends the amplified downlink data to the second user equipment.

8. A downlink transmission device, characterized in that, This is applied to beam management, which simultaneously considers beam management of the access link and the backhaul link. The beam management of the access link includes dynamic beam management of the access link, and the beam management of the backhaul link also includes dynamic beam management of the backhaul link. The access link is a link between a smart repeater and a second user equipment, and the backhaul link is a link between a base station and a smart repeater. The application includes: The status acquisition module is configured to have a first user equipment send a first downlink channel status information to a base station, and a second user equipment send a second downlink channel status information to a smart repeater; wherein the first user equipment is outside the coverage area of ​​the smart repeater, and the second user equipment is within the coverage area of ​​the smart repeater; The device recommendation module is configured so that the intelligent repeater determines the second user equipment that meets the downlink multi-beam transmission conditions based on the second downlink channel state information, and generates a physical uplink control channel message scrambled with the intelligent repeater wireless network temporary identifier, so as to send the second downlink channel state information carried by the physical uplink control channel message scrambled with the intelligent repeater wireless network temporary identifier to the base station; wherein, the physical uplink control channel message scrambled with the intelligent repeater wireless network temporary identifier includes an uplink control information message, the uplink control information message includes a terminal identifier and a downlink multiple user multiple inputs and multiple outputs indication, the terminal identifier uniquely identifies the second user equipment, and the downlink multiple user multiple inputs and multiple outputs indication suggests configuring downlink multiple user multiple inputs and multiple outputs for the involved second user equipment; The downlink configuration module is configured such that the base station performs downlink transmission configuration on the first user equipment based on the first downlink channel state information to obtain first downlink configuration information, and the base station performs downlink transmission configuration on the intelligent repeater to obtain third downlink configuration information, wherein the downlink transmission configuration is beam management configuration; and / or The base station performs downlink transmission configuration on the second user equipment that meets the downlink transmission conditions according to the second downlink channel state information to obtain second downlink configuration information, and the base station performs downlink transmission configuration on the intelligent repeater to obtain third downlink configuration information, wherein the downlink transmission configuration is beam management configuration; The data transmission module is configured such that the base station transmits downlink data to the first user equipment and the second user equipment that meets the downlink transmission conditions according to the first downlink configuration information and the third downlink configuration information, and / or the base station transmits downlink data to the second user equipment that meets the downlink transmission conditions according to the second downlink configuration information and the third downlink configuration information.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the downlink transmission method according to any one of claims 1-7.

10. An electronic device, characterized in that, include: processor; Memory for storing the executable instructions of the processor; The processor is configured to execute the downlink transmission method of any one of claims 1-7 by executing the executable instructions.

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