CN117119475A - Downlink transmission method and device, storage medium and electronic equipment - Google Patents

Downlink transmission method and device, storage medium and electronic equipment Download PDF

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Publication number
CN117119475A
CN117119475A CN202210520745.5A CN202210520745A CN117119475A CN 117119475 A CN117119475 A CN 117119475A CN 202210520745 A CN202210520745 A CN 202210520745A CN 117119475 A CN117119475 A CN 117119475A
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China
Prior art keywords
downlink
user equipment
information
channel state
configuration
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信金灿
许森
熊尚坤
张化
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China Telecom Corp Ltd
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China Telecom Corp Ltd
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Priority to CN202210520745.5A priority Critical patent/CN117119475A/en
Publication of CN117119475A publication Critical patent/CN117119475A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
    • H04W72/1273—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of downlink data flows

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The disclosure belongs to the technical field of mobile communication, and relates to a downlink transmission method and device, a storage medium and electronic equipment. The method comprises the following steps: 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; determining that the second user equipment recommends to the base station according to the second downlink channel state information, and sending the second downlink channel state information to the base station; carrying out downlink transmission configuration on the first user equipment and the second user equipment to obtain first downlink configuration information, and carrying out downlink transmission configuration on the second user equipment to obtain second downlink configuration information; and carrying out downlink transmission configuration on the intelligent repeater to obtain third downlink configuration information, and transmitting downlink data 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 method and the device acquire complete downlink channel state information under the scene of deploying the repeater to realize downlink transmission.

Description

Downlink transmission method and device, storage medium and electronic equipment
Technical Field
The disclosure relates to the technical field of mobile communication, and in particular relates to a downlink transmission method, a downlink transmission device, a computer readable storage medium and electronic equipment.
Background
Repeater is a common device used for expanding coverage in wireless communication systems, and has related applications in the age from 2G (2-Generation wireless telephone technology, second generation handset communication specifications) to 5G (5 th Generation Mobile Communication Technology, fifth generation mobile communication technologies). The main function of the current radio frequency repeater is to amplify the signal, and does not analyze the signal itself.
On the one hand, the wireless repeater amplifies the useful signal and simultaneously amplifies noise and interference signals because the wireless repeater amplifies only the signal; on the other hand, in order to improve the spatial freedom of wireless signal transmission and improve the spectrum efficiency and channel capacity of a radio access network, LTE (Long Term Evolution, long term evolution of general mobile communication technology) proposes a multiple input multiple output technology. In the intelligent repeater deployment scenario, the following problems exist when the above requirements are supported in the current 3GPP (3 rd Generation Partnership Project, third generation partnership project) specifications: firstly, a base station cannot acquire complete downlink channel state information from the base station to a terminal; secondly, the base station cannot issue downlink MU-MIMO (Multi-User Multiple-Input Multiple-Output) configuration for the terminal; thirdly, the intelligent repeater cannot assist in realizing downlink MU-MIMO transmission.
In view of this, there is a need in the art to develop a new downlink transmission method and apparatus.
It should be noted that the information disclosed in the above background section is only for enhancing understanding of the background of the present disclosure and thus may include information that does not constitute prior art known to those of ordinary skill in the art.
Disclosure of Invention
The disclosure aims to provide a downlink transmission method, a downlink transmission device, a computer readable storage medium and an electronic device, so as to overcome at least to a certain extent the technical problem that complete downlink channel state information cannot be acquired for downlink MU-MIMO transmission in a scenario of deploying a repeater due to the limitation of related technology.
Other features and advantages of the present disclosure will be apparent from the following detailed description, or may be learned in part by the practice of the disclosure.
According to a first aspect of an embodiment of the present invention, there is provided a downlink transmission method applied to beam management, where the beam management considers beam management of an access link and beam management of a backhaul link at the same time, 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 an intelligent repeater and a second user equipment, and the backhaul link is a link between a base station and the intelligent repeater, the method including:
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; the first user equipment is located outside the coverage area of the intelligent repeater, and the second user equipment is located in the coverage area of the intelligent repeater;
the intelligent repeater determines the second user equipment which accords with 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 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; the physical uplink control channel message scrambled by the intelligent repeater wireless network temporary identifier comprises an uplink control information message, wherein the uplink control information message comprises a terminal identifier, a downlink multi-user multi-input and multi-output indication, the terminal identifier uniquely identifies a second user equipment, and the downlink multi-user multi-input and multi-output indication suggests that the downlink multi-user multi-input and multi-output are configured for the second user equipment concerned;
The base station performs downlink transmission configuration on the first user equipment and the second user equipment meeting downlink transmission conditions 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, wherein the downlink transmission configuration is beam management configuration; and/or
The base station performs downlink transmission configuration on the second user equipment meeting downlink transmission conditions 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, wherein the downlink transmission configuration is beam management configuration;
the base station transmits downlink data to the first user equipment and the second user equipment which meet 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 which meets downlink transmission conditions according to the second downlink configuration information and the third downlink configuration information.
In an exemplary embodiment of the present invention, the first ue sends first downlink channel state information to the base station, and the second ue sends second downlink channel state information to the intelligent repeater, including:
the base station transmits downlink channel measurement configuration information according to terminal capability information of first user equipment and second user equipment, and transmits the downlink channel measurement configuration information to the first user equipment and the intelligent repeater through a radio resource control message; the downlink channel measurement configuration information comprises resource configuration information and channel state information reporting configuration information of a channel state information reference signal, the radio resource control information is a radio resource control reconfiguration message or a radio resource control recovery message, and the radio resource control information comprises a terminal identifier, channel state information resource configuration and channel state information reporting configuration;
the channel state information resource allocation comprises a channel state information identifier, a channel state information reference signal resource set list and a resource type, wherein the channel state information reference signal resource set list comprises channel state information interference measurement, a non-zero power channel state information reference signal and a synchronous block, and the resource type is an enumeration type and comprises three types of periodic, semi-static and non-periodic, and periodic measurement is taken at the moment;
The channel state information reporting configuration comprises reporting configuration identifiers, carriers, channel measurement resources, channel state information interference measurement resources, reporting type configuration, a channel quality indication table and reporting quality, wherein the reporting configuration identifiers identify the channel state information reporting configuration, the carriers are serving cell identifiers and indicate which serving cell discovers the channel state information reporting configuration information, the channel measurement resources are channel resource configuration identifiers, an integer between 1 and N is taken, N represents the maximum value of the channel state information resource configuration, the channel state information interference measurement resources are used for interference measurement, the channel resource configuration identifiers are taken, the integer between 1 and N is taken, the reporting type configuration comprises three types of periodicity, semi-statics and aperiodics, the periodicity needs to indicate reporting time slot configuration and a channel state information resource list of a physical uplink control channel, the reporting quality comprises channel quality indication, recommended precoding matrix indication, layer indication and rank indication, and the recommended precoding matrix indication is one precoding selected from a 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 issued 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: the method comprises the steps of terminal identification, channel quality indication, recommended precoding matrix indication, layer indication and rank indication, wherein the terminal identification uniquely identifies a terminal and comprises a cell wireless network temporary identification, and the recommended precoding matrix indication comprises one precoding selected from a codebook;
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, reports configuration according to the 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 wireless network temporary identifier; wherein the second downlink channel state information includes: the method comprises the steps of terminal identification, channel quality indication, recommended precoding matrix indication, layer indication and rank indication, wherein the terminal identification uniquely identifies a terminal and comprises a cell wireless network temporary identification, and the recommended precoding matrix indication comprises one precoding selected from a codebook.
In an exemplary embodiment of the present invention, 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 method further includes:
the base station acquires repeater capability information of the intelligent repeater and sends capability acquisition request information to the first user equipment and the second user equipment; the repeater capability information comprises position 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; the terminal capability information comprises a channel state information reference signal resource set list, the maximum codebook number which can be scheduled by downlink control information, the maximum multiple input multiple output layer number and a modulation and coding strategy table;
the channel state information reference signal resource set list indicates a channel state information reference signal list supported by the terminal;
the maximum codebook quantity which can be scheduled by the downlink control information is of an enumeration type;
the maximum MIMO layer number indicates the maximum MIMO layer number which can be supported by the partial bandwidth of the physical downlink shared channel;
The modulation and coding strategy table indicates a modulation and coding strategy table available for the physical downlink shared channel.
In an exemplary embodiment of the present invention, the base station performs downlink transmission configuration on the first ue and the second ue that meet downlink transmission conditions according to 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 meeting downlink transmission conditions according to 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 second user equipment meeting downlink transmission conditions according to the second downlink channel state information to obtain second downlink configuration information, and the method comprises the following steps:
and based on the repeater capability information, the base station performs downlink transmission configuration on the second user equipment meeting downlink transmission conditions according to the second downlink channel state information to obtain second downlink configuration information.
In an exemplary embodiment of the present invention, the base station issues downlink data to the first ue and the second ue that meet downlink transmission conditions according to the first downlink configuration information and the third downlink configuration information, and/or the base station issues downlink data to the second ue that meets 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 through a physical downlink control channel message scrambled by a cell wireless network temporary identifier, the physical downlink control channel message scrambled by the cell wireless network temporary identifier comprises a downlink control information message, the downlink control information message comprises precoding information, a downlink multiple-input multiple-output layer number and a modulation and coding strategy, the precoding information indicates a downlink precoding matrix, the downlink multiple-input multiple-output layer number indicates that the multiple-input multiple-output layer number is supported in a part of bandwidth where a physical downlink shared channel is located, and the modulation and coding strategy indicates physical downlink shared channel resource allocation and corresponding modulation and coding strategy;
The second downlink configuration information is sent to the intelligent repeater through a physical downlink control channel message scrambled by a cell wireless network temporary identifier, the physical downlink control channel message scrambled by the cell wireless network temporary identifier comprises a downlink control information message, the downlink control information message comprises precoding information, a downlink multiple-input multiple-output layer number and a modulation and coding strategy, the precoding information indicates a downlink precoding matrix, the downlink multiple-input multiple-output layer number indicates that the multiple-input multiple-output layer number is supported in a part of bandwidth where a physical downlink shared channel is located, and the modulation and coding strategy indicates physical downlink shared channel resource allocation and corresponding modulation and coding strategy;
the third downlink configuration information is sent to the intelligent repeater through a physical downlink control channel message scrambled by the intelligent repeater wireless network temporary identifier, the physical downlink control channel message scrambled by the intelligent repeater wireless network temporary identifier comprises a downlink control information message, the downlink control information message comprises a terminal identifier and a downlink multi-user multi-input multi-output precoding matrix, the terminal identifier uniquely identifies a second user device through a cell wireless network temporary identifier and indicates the second user device needing downlink multi-user multi-input multi-output;
The intelligent repeater station stores the third downlink configuration information, amplifies the first downlink configuration information and the second downlink configuration information and then sends the amplified first downlink configuration information and the amplified second downlink configuration information to the second user equipment which accords with downlink transmission conditions;
the base station transmits downlink data to the first user equipment and the second user equipment conforming to 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 conforming to downlink transmission conditions according to the second downlink configuration information and the third downlink configuration information.
In an exemplary embodiment of the present invention, the base station issues downlink data to the first ue and the second ue that meets a 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 ue that meets a downlink transmission condition according to the second downlink configuration information and the third downlink configuration information, including:
the base station transmits downlink data to the intelligent repeater and the first user equipment, and the intelligent repeater determines the second user equipment which is related to the downlink data and accords with downlink transmission conditions; the downlink data further comprises a terminal identifier, wherein the terminal identifier uniquely identifies second user equipment and comprises a cell wireless network temporary identifier;
The intelligent repeater transmits the downlink data to the second user equipment which is related to the downlink data and accords with a downlink transmission condition according to the first downlink configuration information and the third downlink configuration information; and/or
And the intelligent repeater transmits the downlink data to the second user equipment which is related to the downlink data and accords with the downlink transmission condition according to the second downlink configuration information and the third downlink configuration information.
In an exemplary embodiment of the present invention, after the base station issues downlink data to the intelligent repeater and the first user equipment, the method further includes:
and when the intelligent repeater determines that the downlink data does not relate to the second user equipment meeting the downlink transmission condition, amplifying the downlink data, and transmitting the amplified downlink data to the second user equipment.
According to a second aspect of the embodiments of the present invention, there is provided a downlink transmission apparatus applied to beam management, where the beam management considers beam management of an access link and beam management of a backhaul link at the same time, 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 an intelligent repeater and a second user equipment, and the backhaul link is a link between a base station and the intelligent repeater, including:
The state acquisition module is configured to send first downlink channel state information to the base station by the first user equipment and send second downlink channel state information to the intelligent repeater by the second user equipment; the first user equipment is located outside the coverage area of the intelligent repeater, and the second user equipment is located in the coverage area of the intelligent repeater;
the device recommending module is configured to determine the second user device conforming to the downlink multi-beam transmission condition according to the second downlink channel state information by the intelligent repeater, and generate a physical uplink control channel message scrambled by 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 by the intelligent repeater wireless network temporary identifier to the base station; the physical uplink control channel message scrambled by the intelligent repeater wireless network temporary identifier comprises an uplink control information message, wherein the uplink control information message comprises a terminal identifier, a downlink multi-user multi-input and multi-output indication, the terminal identifier uniquely identifies a second user equipment, and the downlink multi-user multi-input and multi-output indication suggests that the downlink multi-user multi-input and multi-output are configured for the second user equipment concerned;
The downlink configuration module is configured to perform downlink transmission configuration on the first user equipment according to the first downlink channel state information to obtain first downlink configuration information, and perform downlink transmission configuration on the intelligent repeater by the base station 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 meeting downlink transmission conditions 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, wherein the downlink transmission configuration is beam management configuration, and the downlink transmission configuration is beam management configuration;
the data transmission module is configured to send downlink data to the first user equipment and the second user equipment which meet downlink transmission conditions according to the first downlink configuration information and the third downlink configuration information, and/or send downlink data to the second user equipment which meets downlink transmission conditions according to the second downlink configuration information and the third downlink configuration information.
According to a third aspect of an embodiment of the present invention, there is provided an electronic apparatus including: a processor and a memory; wherein the memory has stored thereon computer readable instructions which, when executed by the processor, implement the downstream transmission method in any of the above-described exemplary embodiments.
According to a fourth aspect of embodiments of the present invention, there is provided a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the downlink transmission method in any of the above-described exemplary embodiments.
As can be seen from the above technical solutions, the downlink transmission method, the downlink transmission device, the computer storage medium, and the electronic device in the exemplary embodiments of the present disclosure have at least the following advantages and positive effects:
in the method and the device provided by the exemplary embodiment of the disclosure, the intelligent repeater can feed back the second downlink channel state information sent by the second user equipment to the base station, so that the base station can obtain the complete downlink channel state information, and downlink transmission configuration is assisted. 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, performs downlink transmission configuration on the intelligent repeater, solves the problem of downlink transmission pairing between the second user equipment in the intelligent repeater, also solves the problem of downlink transmission pairing between the second user equipment in the intelligent repeater and the first user equipment outside the intelligent repeater, assists in realizing the multi-input multi-output transmission effect of downlink multiple users, and further improves the spatial multiplexing gain and the downlink transmission performance.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure. It will be apparent to those of ordinary skill in the art that the drawings in the following description are merely examples of the disclosure and that other drawings may be derived from them without undue effort.
Fig. 1 shows a schematic diagram of an implementation structure of a wireless repeater;
fig. 2 shows a schematic diagram of signal amplification effect of a wireless repeater;
FIG. 3 shows a schematic architecture diagram of an IAB device of the 5G era;
fig. 4 shows a schematic diagram of data transmission by a radio frequency repeater;
fig. 5 shows a schematic diagram of data transmission by an intelligent repeater;
fig. 6 shows a protocol stack schematic of an intelligent repeater;
fig. 7 shows a link structure diagram of the intelligent repeater;
fig. 8 shows a schematic structural diagram of a multi-user MIMO system;
fig. 9 schematically illustrates a flowchart of a downlink transmission method in an exemplary embodiment of the disclosure;
Fig. 10 schematically illustrates a flowchart of a method for transmitting first downlink channel state information and second downlink channel state information in an exemplary embodiment of the present disclosure;
fig. 11 schematically illustrates a flowchart of a method for acquiring terminal capability information of a first user equipment and a second user equipment in an exemplary embodiment of the present disclosure;
fig. 12 schematically illustrates a flowchart of a method for downlink transmission configuration by a base station in an exemplary embodiment of the disclosure;
fig. 13 schematically illustrates a flowchart of a method for a base station to issue downlink data in an exemplary embodiment of the present disclosure;
fig. 14 schematically illustrates a flowchart of a method for a base station to further issue downlink data in an exemplary embodiment of the present disclosure;
fig. 15 schematically illustrates a flowchart of a downlink transmission method in an application scenario in an exemplary embodiment of the present disclosure;
fig. 16 schematically illustrates a structural diagram of a downlink transmission apparatus in an exemplary embodiment of the present disclosure;
fig. 17 schematically illustrates an electronic device for implementing a downlink transmission method in an exemplary embodiment of the disclosure;
fig. 18 schematically illustrates a computer-readable storage medium for implementing a downlink transmission method in an exemplary embodiment of the present disclosure.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments may be embodied in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the present disclosure. One skilled in the relevant art will recognize, however, that the aspects of the disclosure may be practiced without one or more of the specific details, or with other methods, components, devices, steps, etc. In other instances, well-known technical solutions have not been shown or described in detail to avoid obscuring aspects of the present disclosure.
The terms "a," "an," "the," and "said" are used in this specification to denote the presence of one or more elements/components/etc.; the terms "comprising" and "having" are intended to be inclusive and mean that there may be additional elements/components/etc. in addition to the listed elements/components/etc.; the terms "first" and "second" and the like are used merely as labels, and are not intended to limit the number of their objects.
Furthermore, the drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus a repetitive description thereof will be omitted. Some of the block diagrams shown in the figures are functional entities and do not necessarily correspond to physically or logically separate entities.
Repeater is a common device used in wireless communication systems for extended coverage, with related applications ranging from the 2G to the 5G age. The main function of the current radio frequency repeater is to amplify the signal, and does not analyze the signal itself.
Fig. 1 shows a schematic implementation structure of a wireless repeater, and as shown in fig. 1, the wireless repeater has a simpler structure compared with a base station. The wireless repeater is composed of an antenna, a radio frequency duplexer, a low noise amplifier, a mixer, an electrically-controlled attenuator, a filter, a power amplifier and other components or modules, and comprises an uplink amplifying link and a downlink amplifying link.
Fig. 2 shows a schematic signal amplification effect of the wireless repeater, and as shown in fig. 2, the wireless repeater amplifies only the useful signal and also amplifies noise and interference signals.
In the standard evolution process of wireless networks, various coverage extension devices have been defined at present, such as a Relay device in the 4G (the 4th generation mobile communication technology, fourth generation mobile communication technology) age and an IAB (Integrated Access Backhaul, integrated access and backhaul) device in the 5G age.
Fig. 3 shows a schematic architecture of an IAB device of the 5G age, which devices are provided with all layer 1 to layer 3 protocol stacks and are opaque to the terminal, as shown in fig. 3.
From the terminal point of view, the Relay device of 4G and the IAB device of 5G are both one base station; from the base station's point of view, both the Relay device and the IAB device are one UE (User Equipment) identity. The base station transmits and receives data by scheduling the Relay device and the IAB device.
The 5G standard is about to introduce a new wireless Repeater technology, namely Smart Repeater, at Rel-18. The related standardization work is not started by 2022 in 1 month, and the intelligent repeater has various characteristics compared with the prior radio frequency repeater.
First, beamforming is supported for terminals covering an area.
Fig. 4 shows a schematic diagram of data transmission of a radio frequency repeater, as shown in fig. 4, where a conventional radio frequency repeater can only amplify and forward signals, and cannot perform beamforming technology for terminals in a coverage area.
Fig. 5 shows a schematic diagram of data transmission of an intelligent repeater, as shown in fig. 5, where the intelligent repeater can support data transmission of user equipment in a beamforming-based manner.
And secondly, supporting to receive control information from the macro station.
Fig. 6 shows a schematic diagram of a protocol stack of an intelligent repeater, which, as shown in fig. 6, at least needs to have a physical layer protocol stack, so that link adjustment between repeater and terminal can be performed based on this.
Fig. 7 shows a schematic link structure of an intelligent repeater, as shown in fig. 7, through which link adjustment can be performed.
Third, security is supported.
On the other hand, in order to improve the spatial freedom of wireless signal transmission and improve the spectrum efficiency and channel capacity of a radio access network, LTE proposes a Multiple-input Multiple-output (MIMO) technology.
The NR (New Radio, new air interface) improves and enhances MIMO based on LTE, and specifically includes DMRS (Demodulation Reference Signal ) design, a New CSI (Channel State Information, channel state information) reporting framework, support of beam management/QCL (Quasi co-location), and other aspects.
Specifically, MIMO allocates the same time-frequency resources to the same UE for transmitting multiple parallel transmissions.
Spatial multiplexing (also known as MIMO) supports two modes, single-User MIMO (SU-MIMO) and multi-User (MU-MIMO).
In SU-MIMO, spatially multiplexed data streams are scheduled to a single user to improve the transmission rate and spectral efficiency of the user.
In MU-MIMO, spatially multiplexed data streams are scheduled to multiple users, which share the same time-frequency resource through spatial multiplexing.
Fig. 8 shows a schematic structure of a multi-user MIMO system, and as shown in fig. 8, in a MU-MIMO system, two most common channels are a multiple access channel (Multiple Access Channel, MAC) and a broadcast channel (Broadcast Channel, BS) respectively correspond to an uplink channel and a downlink channel.
Fig. 8 illustrates an uplink channel in a multi-user MIMO system, where the uplink channel refers to a communication channel from a plurality of users to a base station. And the downlink channel refers to a communication channel from the base station to the plurality of users.
In the downlink of the MU-MIMO system, the base station transmits information to a plurality of UEs simultaneously, and each UE receives useful information and redundant information transmitted to other UEs simultaneously.
In order to eliminate the interference of redundant information to the UE, a precoding technology is proposed. Specifically, the precoding technology refers to that on the premise that the transmitting end knows complete CSI, the CSI is utilized to process and change signals in advance at the transmitting end, so that space diversity is realized, and the receiving end can detect the signals more effectively.
In 3GPP NR, gNB (NR Node B, NR Node) firstly transmits CSI-RS (CSI Reference Signal ) resources for measuring channel quality, and configures CSI reporting related parameters; then, the UE performs measurement according to the CSI-RS resources issued by the base station, and reports measurement results according to Report configuration parameters, such as CSI-RS resource indication (CSI-RS Resource Indicator, CRI), RI (Rank indicator), PMI (Precoding matrix indicator, precoding matrix indication), CQI (Channel quality indicator, channel quality indication) and the like; finally, the gNB performs downlink MIMO related processing according to the CSI measurement result reported by the UE, for example, determining the downlink transmission layer number, the downlink precoding code (Precoder) and the like.
In a scenario with an intelligent repeater, the macro station sends the UE information to the intelligent repeater, which processes it and forwards it to the served UE. From the macro point of view, the intelligent repeater is a terminal, while from the UE point of view, the intelligent repeater is a base station. In order to further improve the resource utilization rate and the terminal performance, in the deployment scenario of the intelligent repeater, various technical problems exist when the requirements are supported in the current 3GPP specifications.
First, the base station cannot acquire complete downlink channel state information from the base station to the terminal.
In the intelligent repeater deployment scenario, the base station sends measurement configuration information to the terminal through the intelligent repeater, the terminal can only measure the downlink channel state between the intelligent repeater and the terminal, and the downlink channel state information between the base station and the intelligent repeater cannot be acquired, so that the complete downlink channel state information between the base station and the terminal cannot be fed back to the base station.
Secondly, the base station cannot issue downlink MU-MIMO configuration for the terminal.
In the deployment scenario of the intelligent repeater, the base station cannot acquire complete downlink channel state information between the base station and the terminal in the intelligent repeater, so that downlink MU-MIMO transmission pairing cannot be performed for the terminal in the intelligent repeater, downlink MU-MIMO transmission cannot be realized, and the improvement of downlink transmission capacity is inhibited.
Thirdly, the intelligent repeater cannot assist in realizing downlink MU-MIMO transmission.
Because the downlink data sent by the base station needs to be sent to the terminal through the intelligent repeater, after the base station configures downlink MU-MIMO transmission for the terminal according to the previous channel state information, the intelligent repeater cannot send the received downlink data to different terminals in a downlink MIMO mode, so that the downlink MU-MIMO transmission cannot be realized.
Based on these technical problems, the current 3GPP NR protocol cannot meet the requirements, and needs to be enhanced by a new manner to meet the requirements of network deployment and optimization.
Aiming at the problems in the related art, the disclosure provides a downlink transmission method, which is applied to beam management, and the beam management considers the beam management of an access link and the beam management of a backhaul link at the same time, wherein the beam management of the access link comprises dynamic beam management of the access link, the beam management of the backhaul link comprises dynamic beam management of the backhaul link, the access link is a link between an intelligent repeater and second user equipment, and the backhaul link is a link between a base station and the intelligent repeater. Fig. 9 shows a flow chart of a downlink transmission method, and as shown in fig. 9, the downlink transmission method at least includes the following steps:
s910, 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 first user equipment is located outside the coverage range of the intelligent repeater, and the second user equipment is located in the coverage range of the intelligent repeater.
S920, the intelligent repeater determines a second user equipment which accords with a downlink multi-beam transmission condition according to second downlink channel state information, and generates a physical uplink control channel message scrambled by 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 by the intelligent repeater wireless network temporary identifier to a base station; the physical uplink control channel message scrambled by the intelligent repeater wireless network temporary identifier comprises an uplink control information message, wherein the uplink control information message comprises a terminal identifier, a downlink multi-user multi-input and multi-output indication, the terminal identifier uniquely identifies the second user equipment, and the downlink multi-user multi-input and multi-output indication suggests that the downlink multi-user multi-input and multi-output is configured for the related second user equipment.
Step S930, the base station performs downlink transmission configuration on the first user equipment and the second user equipment which meet downlink transmission conditions 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, wherein the downlink transmission configuration is beam management configuration; and/or
And 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, wherein the downlink transmission configuration is beam management configuration.
Step S940, the base station transmits downlink data to the first user equipment and the second user equipment which accords with 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 which accords with the downlink transmission condition according to the second downlink configuration information and the third downlink configuration information.
In the exemplary embodiment of the disclosure, the intelligent repeater can feed back the second downlink channel state information sent by the second user equipment to the base station, so as to help the base station to acquire the 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, performs downlink transmission configuration on the intelligent repeater, solves the problem of downlink transmission pairing between the second user equipment in the intelligent repeater, also solves the problem of downlink transmission pairing between the second user equipment in the intelligent repeater and the first user equipment outside the intelligent repeater, assists in realizing the multi-input multi-output transmission effect of downlink multiple users, and further improves the spatial multiplexing gain and the downlink transmission performance.
The following describes each step of the downlink transmission method in detail.
In step S910, the first ue sends first downlink channel state information to the base station, and the second ue sends second downlink channel state information to the intelligent repeater; the first user equipment is located outside the coverage range of the intelligent repeater, and the second user equipment is located in the coverage range of the intelligent repeater.
In an exemplary embodiment of the present disclosure, the location at which the intelligent repeater is deployed is fixed.
In an alternative embodiment, fig. 10 shows a flow chart of a method for transmitting first downlink channel state information and second downlink channel state information, and as shown in fig. 10, the method may at least include the following steps: in step S1010, the base station issues 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; the downlink channel measurement configuration information comprises resource configuration information of a channel state information reference signal and channel state information reporting configuration information, the radio resource control information is a radio resource control reconfiguration message or a radio resource control recovery message, and the radio resource control information comprises a terminal identifier, channel state information resource configuration and channel state information reporting configuration;
The channel state information resource allocation comprises a channel state information identifier, a channel state information reference signal resource set list and a resource type, wherein the channel state information reference signal resource set list comprises channel state information interference measurement, non-zero power channel state information reference signals and synchronous blocks, the resource type is an enumeration type and comprises periodic, semi-static and non-periodic types, and periodic measurement is taken at the moment;
the channel state information reporting configuration comprises reporting configuration identification, carrier wave, channel measurement resource, channel state information interference measurement resource, reporting type configuration, channel quality indication table and reporting quality, wherein the reporting configuration identification identifies the channel state information reporting configuration, the carrier wave is service cell identification and indicates which service cell discovers the channel state information reporting configuration information, the channel measurement resource is the channel resource configuration identification, an integer between 1 and N is taken, N represents the maximum value of the channel state information resource configuration, the channel state information interference measurement resource is used for interference measurement, the integer between 1 and N is taken for the channel resource configuration identification, the reporting type configuration comprises three types of periodicity, semi-statics and aperiodics, the periodicity needs to indicate reporting time slot configuration and the 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, and the recommended precoding matrix indication is a precoding selected from a codebook.
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 base station can acquire the terminal capability information of the first user equipment and the second user equipment and acquire the repeater capability information of the intelligent repeater.
In an alternative embodiment, fig. 11 shows a flowchart of a method for acquiring terminal capability information of a first user equipment and a second user equipment, and as shown in fig. 11, the method may at least include the following steps: in step S1110, the base station acquires repeater capability information of the intelligent repeater, and sends capability acquisition request information to the first user equipment and the second user equipment; the repeater capability information comprises position information, beam configuration information and multi-antenna transmission capability information of the intelligent repeater.
After the intelligent repeater deployment, the base station may obtain repeater capability information for the intelligent repeater.
It should be noted that, since the intelligent repeater is disposed 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.
The backhaul link is a link between the base station and the intelligent repeater, and the access link is a link between the intelligent repeater and the terminal.
The repeater capability information may include location information and related capability configuration information of the intelligent repeater. Further, the correlation capability configuration information may include beam configuration information of the intelligent repeater, multi-antenna transmission capability information, and the like, which is not particularly limited in the present exemplary embodiment.
On the other hand, in order to acquire terminal capability information of the first user equipment and the second user equipment, the base station may further send capability acquisition request information to the first user equipment and the second user equipment.
In step S1120, the first user equipment and the second user equipment return terminal capability information to the base station according to the capability acquisition request; the terminal capability information comprises a channel state information reference signal resource set list, the maximum codebook number which can be scheduled by downlink control information, the maximum MIMO layer number and a modulation and coding strategy table;
the channel state information reference signal resource set list indicates a channel state information reference signal list supported by the terminal;
the maximum codebook quantity which can be scheduled by the downlink control information is of an enumeration type;
the maximum MIMO layer number indicates the maximum MIMO layer number which can be supported by the partial bandwidth 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.
After 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.
The terminal capability information may include: a channel state information reference signal (CSI-RS) resource set list for indicating a CSI-RS list supported by the terminal; the maximum codebook number which can be scheduled by the downlink control information can be of an enumeration type; the maximum MIMO layer number is used to indicate the maximum MIMO layer number that can be supported by the BWP (Bandwidth part) where the PDSCH (Physical downlink shared channel) is located; modulation and coding scheme (Modulation and Coding Scheme, MCS) table, indicating the PDSCH available MCS table, etc., which is not particularly limited by the present exemplary embodiment.
In this exemplary embodiment, the base station may acquire terminal capability information of the first user equipment and the second user equipment, and 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.
After the base station obtains 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.
When the base station transmits 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 transmitted to the first user equipment and the intelligent repeater through a radio resource control message. The radio resource control message may include an RRC (Radio Resource Control ) reconfiguration message or an RRC restore message, among others.
The downlink channel measurement configuration information comprises resource configuration information and CSI reporting configuration information of a reference signal (CSI-RS).
And the radio resource control message may include: terminal identification, CSI resource configuration and CSI reporting configuration.
Specifically, the CSI resource configuration may further include a channel state information identifier and a CSI-RS resource set list, which specifically includes BWP identifiers such as CSI-IM (Channel State Information Interference Measurement, CSI interference measurement), NZP CSI-RS (Non-Zero Power CSI-RS), SSB (Synchronization Signal/PBCH Block, synchronization Block), and the like; resource types, such as enumerated types, may also be included, including periodic, semi-static, and non-periodic, where periodic measurements may be taken.
The CSI reporting configuration may include a reporting configuration identifier, configured to identify the CSI reporting configuration; the channel measurement resource, namely the channel resource allocation identifier, takes an integer between 1 and N, wherein N represents the maximum value of CSI resource allocation; the CSI interference measurement resource is used for interference measurement of channel resource allocation identification, and an integer between 1 and N is taken; reporting type configuration including three types of periodicity, semi-static and aperiodic, wherein periodicity needs to indicate reporting time slot configuration and a Physical Uplink Control Channel (PUCCH) CSI resource list; CQI tables; reporting quality, including channel quality indication, recommended precoding matrix indication, layer indication, and rank indication, the recommended precoding matrix indication being a precoding selected from a codebook, etc.
When the base station transmits 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 transmit the downlink channel measurement configuration information for all user equipment in a coverage area based on the repeater capability information stored before and the terminal capability information of the first user equipment and the second user equipment.
Specifically, the base station may send, on the corresponding video resource, the CSI-RS signal in the downlink channel measurement configuration information to the first user equipment.
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 ue.
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 area.
In step S1030, the first ue 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 includes: terminal identification, channel quality indication, recommended precoding matrix indication, layer indication and rank indication, the terminal identification uniquely identifying the terminal including a cell radio network temporary identification, the recommended precoding matrix indication including a precoding selected from a codebook.
And all user equipment covered by the base station measure the CSI-RS on the specific video resource based on the downlink channel measurement configuration information and report corresponding CSI parameters.
Specifically, for a first user equipment which is not covered by the intelligent repeater, the first user equipment measures a CSI-RS signal sent by the base station on a specific video resource according to downlink channel measurement configuration information sent by the base station, and calculates relevant parameters to obtain first downlink channel state information.
And then, reporting the first downlink channel state information according to the CSI, and sending the CSI related parameters to the base station.
The first downlink channel state information comprises a terminal identifier, a channel quality indicator, a recommended precoding matrix indicator, a layer indicator and a rank indicator.
In particular, the terminal identity may uniquely identify the first user equipment, e.g. a C-RNTI (Cell Radio Network Temporary Identifier, cell radio network temporary identity); the precoding matrix indicator may be a recommended precoding matrix indicator PMI, which may be one precoding selected from a codebook.
In step S1040, the second ue measures, according to the downlink channel measurement configuration information, a channel state information reference signal sent by the base station on a corresponding time-frequency resource, and calculates second downlink channel state information, so as to report the configuration according to the channel state information, and send the second downlink channel state information to the intelligent repeater through a physical uplink control channel message scrambled by the cell radio network temporary identifier; 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 identifying the terminal including a cell radio network temporary identification, the recommended precoding matrix indication including a precoding selected from a codebook.
And all user equipment covered by the base station measure the CSI-RS on the specific video resource based on the downlink channel measurement configuration information and report corresponding CSI parameters.
Specifically, for a second user equipment covered by 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, and calculates the corresponding CSI-related parameter to obtain second downlink channel state information.
And then, the second user equipment reports the second downlink channel state information according to the CSI, and sends the second downlink channel state information to the intelligent repeater through the PUCCH message scrambled by the C-RNTI.
The second downlink channel state information may include: terminal identification, channel quality indication, recommended precoding matrix indication, layer indication, and rank indication.
Specifically, the terminal identifier may uniquely identify the first user equipment, for example, the C-RNTI; the recommended precoding matrix indication may be a recommended precoding matrix indication PMI, which may be one precoding selected from a codebook.
In this exemplary embodiment, the base station acquires the first downlink channel state information and the second downlink channel state information by sending the downlink channel measurement configuration information, and the intelligent repeater may feed back the downlink channel state information between the intelligent repeater fed back by the second user equipment and the second user equipment to the base station, so as to help the base station acquire the complete downlink channel state information and assist in downlink transmission configuration.
In step S920, the intelligent repeater determines a second user equipment according with 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, 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; the physical uplink control channel message scrambled by the intelligent repeater wireless network temporary identifier comprises an uplink control information message, wherein the uplink control information message comprises a terminal identifier, a downlink multi-user multi-input and multi-output indication, the terminal identifier uniquely identifies a second user equipment, and the downlink multi-user multi-input and multi-output indication suggests that the downlink multi-user multi-input and multi-output are configured for the second user equipment involved.
In the exemplary embodiments of the present disclosure, in view of the fact that in the intelligent repeater deployment scenario, the wireless environment between the intelligent repeater and the base station may change dynamically, adaptive dynamic beam management of the backhaul link is required in order to obtain higher gain.
On the other hand, in consideration of the movement of the terminal, the radio link between the terminal and the intelligent repeater also changes dynamically, and thus, dynamic beam management of the access link is required.
Thus, in order to achieve dynamic beam management, channel conditions may be measured by a channel state information reference signal channel.
And when the intelligent repeater receives the C-RNTI scrambled PUCCH messages reported by a plurality of second user equipment at the same time or in a short time interval, analyzing to obtain second channel state information.
Further, determining whether the corresponding second ue accords with the downlink multi-beam transmission, i.e. MU-MIMO condition, according to the location information of the second ue. If the information is in accordance with the request, the intelligent repeater can recommend the downlink MU-MIMO configuration to the base station as the corresponding second user equipment, generate a new PUCCH message scrambled by SR-RNTI (Smart Repeater Radio Network Temporary Identi fier, intelligent repeater radio network temporary identifier), and send the PUCCH message scrambled by C-RNTI reported by the second user equipment to the base station together with the PUCCH message scrambled by C-RNTI so that the base station receives the second downlink channel state information.
Specifically, the new SR-RNTI scrambled PUCCH message contains a newly defined UCI (Uplink Control Information ) message, which may include: terminal identity and DL MU-MIMO (downlink Link MU-MIMO, downlink multi-user multiple input and multiple output) indication.
The terminal identifier may uniquely identify the second user equipment, and DL MU-MIMO indication suggests that downlink DL MU-MIMO is configured for the involved terminal.
In step S930, the base station performs downlink transmission configuration on the first user equipment according to the first 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, where the downlink transmission configuration is beam management configuration; and/or
And 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, wherein the downlink transmission configuration is beam management configuration.
In an exemplary embodiment of the disclosure, after a base station receives downlink channel CSI information under a coverage area fed back by a second user equipment, downlink channel CSI information fed back by a first user equipment outside an intelligent repeater (including channel state information parameters sent by a terminal and the intelligent repeater), and downlink multi-beam transmission (downlink MU-MIMO) indication sent by the intelligent repeater, the base station analyzes channel state information between the intelligent repeater and the base station, channel state information between the terminal and the intelligent repeater, repeater capability information and terminal capability information by receiving feedback information of the intelligent repeater, and can perform MU-MIMO pairing on the first user equipment and the second user equipment involved.
In an alternative embodiment, fig. 12 is a flow chart illustrating a method for downlink transmission configuration by a base station, and as shown in fig. 12, the method may 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 according to the first downlink channel state information and the second downlink channel state information to obtain first downlink configuration information.
If the base station performs downlink transmission configuration for the second user equipment in the intelligent repeater and the first user equipment outside the intelligent repeater, the base station performs downlink transmission configuration for the first user equipment and the second user equipment meeting downlink transmission conditions on the basis of considering the intelligent repeater and the first user equipment so as to obtain first downlink configuration information.
Specifically, the base station performs precoding calculation on data to be transmitted based on the accurate first downlink channel state information and the accurate second downlink channel state information, so as to transmit the data to a plurality of terminals through the same time-frequency resource information. Because the plurality of user equipment use the same time-frequency resource and have interference with each other, the base station selects the paired user equipment with smaller interference with each other to perform downlink MU-MIMO transmission configuration.
The first downlink configuration information includes downlink precoding related information.
In step S1220, based on the repeater capability information, the base station performs downlink transmission configuration on the second ue according to the second downlink channel state information to obtain second downlink configuration information.
If the base station performs downlink transmission configuration for the second user equipment in the intelligent repeater, the base station performs downlink transmission configuration for the second user equipment in the intelligent repeater under the condition of considering repeater capability information of the intelligent repeater, such as the number of antenna ports, so as to obtain second downlink configuration information.
Specifically, the second downlink configuration information includes a downlink precoding matrix, a transmission layer number, and the like. In this exemplary embodiment, the base station performs downlink transmission configuration according to the first downlink channel state information and the second downlink channel state information under the condition that the capability information of the repeater and the capability information of the terminal are considered, so as to provide support for downlink MU-MIMO transmission of the second user equipment in the intelligent repeater and also provide support for MU-MIMO transmission of the second user equipment in the intelligent repeater and the first user equipment outside the intelligent repeater.
In addition, considering that downlink data issued by the base station needs to be sent to the second user equipment through the intelligent repeater, in order to implement downlink MU-MIMO transmission, the base station needs to send, in addition to the second downlink configuration information issued for the second user equipment to the intelligent repeater through the DCI message, to issue MU-MIMO configuration information, that is, third downlink configuration information, for the intelligent repeater on the basis of considering the capability of the intelligent repeater.
In step S940, the base station transmits downlink data to the first ue and the second ue according to 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 ue according to the second downlink configuration information and the third downlink configuration information.
In an exemplary embodiment of the present disclosure, the base station may issue downlink data according to the first downlink configuration information, the second downlink configuration information, and the third downlink configuration information.
In an alternative embodiment, fig. 13 shows a flow chart of a method for a base station to issue downlink data, and as shown in fig. 13, the method may at least include the following steps: in step S1310, the base station sends first downlink configuration information to the first user equipment and the intelligent repeater, and sends second downlink configuration information and 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 physical downlink control channel message scrambled by a cell radio network temporary identifier, the physical downlink control channel message scrambled by the cell radio network temporary identifier includes a downlink control information message, the downlink control information message includes precoding information, a downlink multiple-input multiple-output layer number and a modulation and coding strategy, the precoding information indicates a downlink precoding matrix, the downlink multiple-input multiple-output layer number indicates that multiple-input multiple-output layer numbers are supported in a part of bandwidths where the physical downlink shared channels are located, and the modulation and coding strategy indicates physical downlink shared channel resource allocation and a corresponding modulation and coding strategy;
The second downlink configuration information is sent to the intelligent repeater through a physical downlink control channel message scrambled by the cell wireless network temporary identifier, the physical downlink control channel message scrambled by the cell wireless network temporary identifier comprises a downlink control information message, the downlink control information message comprises precoding information, a downlink multiple-input multiple-output layer number and a modulation and coding strategy, the precoding information indicates a downlink precoding matrix, the downlink multiple-input multiple-output layer number indicates that the multiple-input multiple-output layer number is supported in a part of bandwidth where a physical downlink shared channel is located, and the modulation and coding strategy indicates physical downlink shared channel resource allocation and corresponding modulation and coding strategy;
the third downlink configuration information is sent to the intelligent repeater through a physical downlink control channel message scrambled by the intelligent repeater wireless network temporary identifier, the physical downlink control channel message scrambled by the intelligent repeater wireless network temporary identifier comprises a downlink control information message, the downlink control information message comprises a terminal identifier and a downlink multi-user multi-input multi-output precoding matrix, the terminal identifier uniquely identifies the second user equipment through the cell wireless network temporary identifier, and the terminal identifier indicates the second user equipment which needs to perform downlink MU-MIMO multi-user multi-input multi-output.
Specifically, after the base station obtains the first downlink configuration information by configuration, the base station sends a physical downlink control channel message scrambled by the cell wireless network temporary identifier to the intelligent repeater and the first user equipment. Specifically, the physical downlink control channel message scrambled by the cell radio network temporary identifier includes a newly defined downlink control information message (Downlink Control Information, DCI), and the downlink control information message includes, but is not limited to: precoding information: indicating a downlink precoding matrix; downlink MIMO layer number: indicating that the PDSCH (Physical downlink shared channel ) supports the MIMO layer number in the BWP; MCS: indicates PDSCH resource allocation and corresponding MCS.
After the base station obtains the second downlink configuration information through configuration, the base station sends the PDCCH message scrambled by the C-RNTI, namely the second downlink configuration information, to the intelligent repeater.
The base station transmits a physical downlink control channel message scrambled by the cell radio network temporary identifier to the intelligent repeater, wherein the physical downlink control channel message scrambled by the cell radio network temporary identifier comprises a newly defined DCI message, and the DCI message comprises but is not limited to: precoding information: indicating a downlink precoding matrix; downlink MIMO layer number: indicating the number of MIMO layers supported in BWP where PDSCH is located; MCS: indicates PDSCH resource allocation and corresponding MCS. After the base station obtains the third downlink configuration information, it generates a PDCCH (Physical downlink control channel ) message scrambled by the SR-RNTI and sends the PDCCH to the intelligent repeater.
Specifically, the SR-RNTI scrambled PDCCH message includes a DCI message including, but not limited to: the terminal identification indicates the terminal needing downlink MU-MIMO transmission by uniquely identifying the terminal through the cell wireless network temporary identification; downlink MU-MIMO precoding matrix: the precoding matrix is transmitted by downlink MIMO.
In step S1320, the intelligent repeater saves the third downlink configuration information, amplifies the first downlink configuration information and the second downlink configuration information, and sends the amplified first downlink configuration information and the amplified second downlink configuration information to the second user equipment that meets the downlink transmission condition.
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 PDCCH message scrambled by the SR-RNTI. And amplifying the second downlink configuration information contained in the PDCCH message scrambled by the C-RNTI and then sending the second downlink configuration information to the corresponding second user equipment.
In step S1330, the base station transmits the downlink data to the first ue and the second ue according to the downlink transmission conditions according to the first downlink configuration information and the third downlink configuration information, and/or the base station transmits the downlink data to the second ue according to the second downlink configuration information and the third downlink configuration information.
In an alternative embodiment, fig. 14 is a flowchart of a method for a base station to further send downlink data, and as shown in fig. 14, the method may at least include the following steps: in step S1410, the base station transmits downlink data to the intelligent repeater and the first user equipment, and the intelligent repeater determines a second user equipment related to the downlink data and conforming to a downlink transmission condition; the downlink data further comprises a terminal identifier, wherein the terminal identifier uniquely identifies the second user equipment and comprises a cell wireless network temporary identifier.
And the base station transmits 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.
The downlink data may include: the terminal identification and downlink data may also include other contents, which are not particularly limited in this exemplary embodiment.
The terminal identifier may uniquely identify the terminal and may be a C-RNTI.
After receiving the downlink data forwarded by the base station, the intelligent repeater can detect whether the downlink data contains second user equipment for downlink transmission configuration.
When the second user equipment performing 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 has already met the downlink transmission condition.
In step S1420, the intelligent repeater transmits the downlink data to the second ue related to the downlink data and conforming to the downlink transmission condition according to the first downlink configuration information and the third downlink configuration information, and/or transmits the downlink data to the second ue related to the downlink data and conforming to the downlink transmission condition according to the second downlink configuration information and the third downlink configuration information.
When the base station is to send downlink data to the first user equipment outside the coverage area of the intelligent repeater and the second user equipment within the coverage area of the intelligent repeater, the base station can send the downlink data to the second user equipment in a downlink MU-MIMO transmission mode when determining that the downlink data relates to the second user equipment which accords with the downlink transmission condition, so that the second user equipment receives the downlink data.
When the base station is to send the downlink data to the second user equipment within the coverage area of the intelligent repeater, the downlink data can be sent to the second user equipment in a downlink MU-MIMO transmission mode when the second user equipment which is related to the downlink data and accords with the downlink transmission condition is determined, so that the second user equipment receives the downlink data.
In addition, the intelligent repeater may also determine that all the second user equipment meeting the downlink transmission condition are not involved in the downlink data, and may forward the downlink data normally.
In an alternative embodiment, when the intelligent repeater determines that the downlink data does not relate to the second user equipment meeting the downlink transmission condition, the intelligent repeater amplifies the downlink data and sends the amplified downlink data to the second user equipment.
When the downlink data does not relate to the second user equipment for downlink transmission configuration, the downlink sentence can be directly amplified, and the amplified downlink data is forwarded to all the second user equipment covered by the intelligent repeater.
After the second ue receives the corresponding downlink data, the second ue may further analyze and feed back the periodicity of the first downlink channel state information and the second downlink state information, so as to dynamically adjust the downlink transmission configuration. Wherein the downlink precoding indication information is carried.
In this exemplary embodiment, the first downlink configuration information, the second downlink configuration information, and the third downlink configuration information are obtained according to the downlink transmission configuration, so that downlink data can be transmitted. In the process, the intelligent repeater is used for assisting in realizing downlink MU-MIMO transmission based on the third downlink configuration information configured by the base station, and the downlink MU-MIMO transmission mode has small influence on the first user equipment and the second user equipment and good backward compatibility and deployment feasibility. In addition, the downlink MU-MIMO transmission mode is enhanced on the existing protocol, so that the change of the existing protocol is small, and the implementation difficulty is low.
The downlink transmission method in the embodiment of the present disclosure is described in detail below with reference to an application scenario.
Fig. 15 shows a flow chart of a downlink transmission method in an application scenario, and as shown in fig. 15, the downlink transmission method may include two application scenarios. One of the methods is that a terminal in an intelligent repeater performs downlink MU-MIMO transmission; and the other is that the terminal in the intelligent repeater and the terminal outside the intelligent repeater carry out downlink MU-MIMO transmission.
In step S1510, the base station issues 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 the radio resource control message; the downlink channel measurement configuration information comprises resource configuration information of a channel state information reference signal and channel state information reporting configuration information, the radio resource control information is a radio resource control reconfiguration message or a radio resource control recovery message, and the radio resource control information comprises a terminal identifier, channel state information resource configuration and channel state information reporting configuration;
the channel state information resource allocation comprises a channel state information identifier, a channel state information reference signal resource set list and a resource type, wherein the channel state information reference signal resource set list comprises channel state information interference measurement, non-zero power channel state information reference signals and synchronous blocks, the resource type is an enumeration type and comprises periodic, semi-static and non-periodic types, and periodic measurement is taken at the moment;
The channel state information reporting configuration comprises reporting configuration identification, carrier wave, channel measurement resource, channel state information interference measurement resource, reporting type configuration, channel quality indication table and reporting quality, wherein the reporting configuration identification identifies the channel state information reporting configuration, the carrier wave is service cell identification and indicates which service cell discovers the channel state information reporting configuration information, the channel measurement resource is the channel resource configuration identification, an integer between 1 and N is taken, N represents the maximum value of the channel state information resource configuration, the channel state information interference measurement resource is used for interference measurement, the integer between 1 and N is taken for the channel resource configuration identification, the reporting type configuration comprises three types of periodicity, semi-statics and aperiodics, the periodicity needs to indicate reporting time slot configuration and the 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, and the recommended precoding matrix indication is a precoding selected from a codebook.
The first user equipment is UE1 and UE2 covered by the intelligent repeater.
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 base station can acquire the terminal capability information of the first user equipment and the second user equipment and acquire the repeater capability information of the intelligent repeater.
The base station acquires repeater capability information of the intelligent repeater and sends capability acquisition request information to the first user equipment and the second user equipment; the repeater capability information comprises position information, beam configuration information and multi-antenna transmission capability information of the intelligent repeater.
After the intelligent repeater deployment, the base station may obtain repeater capability information for the intelligent repeater.
The repeater capability information may include location information and related capability configuration information of the intelligent repeater. Further, the correlation capability configuration information may include an antenna configuration of the intelligent repeater, a multi-antenna transmission capability, and the like, which is not particularly limited in the present exemplary embodiment.
On the other hand, in order to acquire terminal capability information of the first user equipment and the second user equipment, the base station may further send capability acquisition request information to the first user equipment and the second user equipment.
And the first user equipment and the second user equipment return terminal capability information to the base station according to the capability acquisition request.
After 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.
The terminal capability information may include: a channel state information reference signal (CSI-RS) resource set list for indicating a CSI-RS list supported by the terminal; the maximum codebook number which can be scheduled by the downlink control information can be of an enumeration type; the maximum MIMO layer number is used for indicating the maximum MIMO layer number supported by the BWP where the PDSCH is located; modulation and Coding Scheme (MCS) tables for indicating PDSCH available MCS tables, etc., which are not particularly limited in the present exemplary embodiment.
After the base station obtains 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.
When the base station transmits 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 transmitted to the first user equipment and the intelligent repeater through a radio resource control message. The radio resource control message may include an RRC reconfiguration message or an RRC restore message.
The downlink channel measurement configuration information comprises resource configuration information and CSI reporting configuration information of a reference signal (CSI-RS).
And the radio resource control message may include: terminal identification, CSI resource configuration and CSI reporting configuration.
Specifically, the CSI resource configuration may further include a CSI-RS resource set list, specifically including BWP identifiers such as CSI-IM, NZP CSI-RS, SSB, and the like; resource types, such as enumerated types, may also be included, including periodic, semi-static, and non-periodic, where periodic measurements may be taken.
The CSI reporting configuration may include a reporting configuration identifier, configured to identify the CSI reporting configuration; the channel measurement resource, namely the channel resource allocation identifier, takes an integer between 1 and N, wherein N represents the maximum value of CSI resource allocation; the CSI interference measurement resource is used for interference measurement of channel resource allocation identification, and an integer between 1 and N is taken; reporting type configuration comprising three types of periodicity, semi-static state and aperiodic state, wherein the periodicity needs to indicate reporting time slot configuration and a PUCCH CSI resource list; CQI tables; reporting quality, including channel quality indication, recommended precoding matrix indication, layer indication, and rank indication, the recommended precoding matrix indication being a precoding selected from a codebook, etc.
When the base station transmits downlink channel measurement configuration information according to the terminal capability information of the first user equipment and the second user equipment, the repeater capability information and the terminal capability information of the first user equipment and the second user equipment which are stored before the base station can transmit the downlink channel measurement configuration information for all the user equipment in the coverage area.
Specifically, the base station may send, on the corresponding video resource, the CSI-RS signal in the downlink channel measurement configuration information to the first user equipment.
The intelligent repeater amplifies the downlink channel measurement configuration information and forwards the amplified downlink channel measurement configuration information to the second user equipment.
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 area.
In step S1520, the first ue measures the reference signal of the channel state information sent by the base station on the corresponding time-frequency resource according to the configuration information of the downlink channel measurement, 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 configuration information of the reporting of the channel state information.
Wherein the first downlink channel state information includes: terminal identification, channel quality indication, precoding matrix indication, layer indication, and rank indication.
And all user equipment covered by the base station measure the CSI-RS on the specific video resource based on the downlink channel measurement configuration information and report corresponding CSI parameters.
Specifically, for a first user equipment which is not covered by the intelligent repeater, the first user equipment measures a CSI-RS signal sent by the base station on a specific video resource according to downlink channel measurement configuration information sent by the base station, and calculates relevant parameters to obtain first downlink channel state information.
And then, reporting the first downlink channel state information according to the CSI, and sending the CSI related parameters to the base station.
The first downlink channel state information comprises a terminal identifier, a channel quality indicator, a precoding matrix indicator, a layer indicator and a rank indicator.
Specifically, the terminal identifier may uniquely identify the first user equipment, for example, the C-RNTI; the precoding matrix indicator may be a recommended precoding matrix indicator PMI, which may be one precoding selected from a codebook.
The second user equipment measures channel state information reference signals sent by the base station on corresponding time-frequency resources according to the downlink channel measurement configuration information, calculates second downlink channel state information, reports the configuration according to the channel state information, and sends the second downlink channel state information to the intelligent repeater through physical uplink control channel information scrambled by the cell wireless network temporary identifier; wherein the second downlink channel state information includes: terminal identification, channel quality indication, precoding matrix indication, layer indication, and rank indication.
And all user equipment covered by the base station measure the CSI-RS on the specific video resource based on the downlink channel measurement configuration information and report corresponding CSI parameters.
Specifically, for a second user equipment covered by 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, and calculates the corresponding CSI-related parameter to obtain second downlink channel state information.
And then, the second user equipment reports the second downlink channel state information according to the CSI, and sends the second downlink channel state information to the intelligent repeater through the PUCCH message scrambled by the C-RNTI.
The second downlink channel state information may include: terminal identification, channel quality indication, precoding matrix indication, layer indication, and rank indication.
Specifically, the terminal identifier may uniquely identify the first user equipment, for example, the C-RNTI; the precoding matrix indicator may be a recommended precoding matrix indicator PMI, which may be one precoding selected from a codebook.
In step S1530, the intelligent repeater sends DL MU-MIMO indication to the base station, and recommends the second ue that meets the downlink transmission condition to the base station.
The intelligent repeater determines second user equipment conforming to the downlink multi-beam transmission condition according to the second downlink channel state information, and generates physical uplink control channel information scrambled by the intelligent repeater wireless network temporary identifier so as to send the second downlink channel state information carried by the physical uplink control channel information scrambled by the intelligent repeater wireless network temporary identifier to the base station; the physical uplink control channel message scrambled by the intelligent repeater wireless network temporary identifier comprises an uplink control information message, wherein the uplink control information message comprises a terminal identifier, a downlink multi-user multi-input and multi-output indication, the terminal identifier uniquely identifies a second user equipment, and the downlink multi-user multi-input and multi-output indication suggests that the downlink multi-user multi-input and multi-output are configured for the second user equipment involved.
In view of the fact that in the deployment scenario of the intelligent repeater, the wireless environment between the intelligent repeater and the base station may change dynamically, in order to obtain higher gain, adaptive dynamic beam management needs to be performed on the backhaul link.
On the other hand, in consideration of the movement of the terminal, the radio link between the terminal and the intelligent repeater also changes dynamically, and thus, dynamic beam management of the access link is required.
Thus, in order to achieve dynamic beam management, channel conditions may be measured by a channel state information reference signal channel.
And when the intelligent repeater receives the C-RNTI scrambled PUCCH messages reported by a plurality of second user equipment at the same time or in a short time interval, analyzing to obtain second channel state information.
Further, whether the corresponding second user equipment accords with the downlink MU-MIMO condition is judged by combining the position information of the second user equipment. If the information is in accordance with the request, the intelligent repeater can recommend the base station to perform downlink MU-MIMO configuration for the corresponding second user equipment, generate a new PUCCH message scrambled by the SR-RNTI, and send the PUC CH message scrambled by the C-RNTI reported by the second user equipment to the base station together with the PUC CH message scrambled by the C-RNTI, so that the base station receives the second downlink channel state information.
Specifically, the SR-RNTI scrambled PUCCH message may include: terminal identity and DL MU-MIMO indication.
The terminal identifier may uniquely identify the second user equipment, and DL MU-MIMO indication suggests that downlink DL MU-MIMO is configured for the involved terminal.
In step S1540, the base station performs DL MU-MIMO pairing for the involved first and second user equipments.
The base station performs downlink transmission configuration on the first user equipment according to the first 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, wherein the downlink transmission configuration is beam management configuration; and/or
And 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, wherein the downlink transmission configuration is beam management configuration.
After receiving 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 includes the downlink channel state information sent by the first user equipment, the second user equipment and the intelligent repeater, and downlink MU-MIMO indication sent by the intelligent repeater, that is, after the recommended second user equipment meeting the downlink transmission condition, 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, and can perform MU-MIMO pairing on the first user equipment and the second user equipment involved.
Based on the repeater capability information and the terminal capability information, the base station performs downlink transmission configuration according to the first downlink channel state information and the second downlink channel state information to obtain first downlink configuration information.
If the base station performs downlink transmission configuration for the second user equipment in the intelligent repeater and the first user equipment outside the intelligent repeater, the base station performs downlink transmission configuration for the first user equipment and the second user equipment meeting downlink transmission conditions on the basis of considering the intelligent repeater and the first user equipment so as to obtain first downlink configuration information.
Specifically, the base station performs precoding calculation on data to be transmitted based on the accurate first downlink channel state information and the accurate second downlink channel state information, so as to transmit the data to a plurality of terminals through the same time-frequency resource information. Because the plurality of user equipment use the same time-frequency resource and have interference with each other, the base station selects the paired user equipment with smaller interference with each other to perform downlink MU-MIMO transmission configuration.
The first downlink configuration information includes downlink precoding related information.
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.
If the base station performs downlink transmission configuration for the second user equipment in the intelligent repeater, the base station performs downlink transmission configuration for the second user equipment in the intelligent repeater under the condition of considering repeater capability information of the intelligent repeater, such as the number of antenna ports, so as to obtain second downlink configuration information.
Specifically, the second downlink configuration information includes a downlink precoding matrix, a transmission layer number, and the like.
In view of that downlink data issued by the base station needs to be sent to the second user equipment through the intelligent repeater, in order to implement downlink MU-MIMO transmission, the base station needs to send, in addition to the second downlink configuration information issued for the second user equipment to the intelligent repeater through the PDCCH message, also needs to issue MU-MIMO configuration information, that is, third downlink configuration information, for the intelligent repeater on the basis of considering the capability of the intelligent repeater.
Further, the base station may send downlink data according to the first downlink configuration information and the third downlink configuration information, and/or send downlink data to the second user equipment that accords with the downlink transmission condition according to the second downlink configuration information and the third downlink configuration information.
And 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.
Specifically, after the base station obtains the first downlink configuration information by configuration, the base station sends PDCCH messages scrambled by the first user identifier (C-RNTI) to the intelligent repeater and the first user equipment, where the messages include, but are not limited to: precoding information, downlink MIMO layer number and MCS.
Wherein, the precoding information indicates a downlink precoding matrix; the downlink MIMO layer number indicates that the PDSCH supports the MIMO layer number in the BWP; the MCS indicates PDSCH resource allocation and corresponding MCS.
After the base station obtains the second downlink configuration information through configuration, the base station sends the PDCCH message scrambled by the C-RNTI, namely the second downlink configuration information, to the intelligent repeater.
Thus, the second downlink configuration information may include: precoding information, downlink MIMO layer number and MCS.
Wherein, the precoding information indicates a downlink precoding matrix; the downlink MIMO layer number indicates that the PDSCH supports the MIMO layer number in the BWP; the MCS indicates PDSCH resource allocation and corresponding MCS.
After the base station obtains the third downlink configuration information, a PDCCH message scrambled by the SR-RNTI is generated and sent to the intelligent repeater.
Specifically, the third downlink configuration information included in the PDCCH message scrambled by the SR-RNTI may include: terminal identification and downlink MU-MIMO precoding matrix.
The terminal identification uniquely identifies the terminal through the C-RNTI and indicates the terminal needing downlink MU-MIMO transmission; the downlink MU-MIMO precoding matrix is a downlink MIMO transmission precoding matrix.
In step S1550, the intelligent repeater saves the third downlink configuration information.
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 PDCCH message scrambled by the SR-RNTI.
In step S1560, the intelligent repeater amplifies the first downlink configuration information and the second downlink configuration information and sends the amplified first downlink configuration information and the amplified second downlink configuration information to the second user equipment that meets the downlink transmission condition.
The intelligent repeater amplifies the second downlink configuration information contained in the PDCCH message scrambled by the C-RNTI and then sends the amplified second downlink configuration information to the corresponding second user equipment, so that the base station can send downlink data to the first user equipment and the second user equipment conforming to the downlink transmission condition according to the first downlink configuration information, the second downlink configuration information and the third downlink configuration information.
The base station transmits downlink data to the intelligent repeater and the first user equipment, and the intelligent repeater determines second user equipment which is related to the downlink data and accords with downlink transmission conditions.
The base station transmits 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 respectively, and/or transmits the downlink data to the second user equipment which accords with the downlink transmission condition according to the second downlink configuration information and the third downlink configuration information.
The downlink data may include: the terminal identification and downlink data may also include other contents, which are not particularly limited in this exemplary embodiment.
The terminal identifier may uniquely identify the terminal and may be a C-RNTI.
After receiving the downlink data forwarded by the base station, the intelligent repeater can detect whether the downlink data contains second user equipment for downlink transmission configuration.
When the second user equipment performing 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 has already met the downlink transmission condition.
The intelligent repeater transmits downlink data to the second user equipment which is related to the downlink data and accords with 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 which is related to the downlink data and accords with the downlink transmission condition according to the second downlink configuration information and the third downlink configuration information.
And in the second user equipment which is determined to be related to the downlink data and accords with the downlink transmission condition, the downlink data can be sent to the second user equipment in a downlink MU-MIMO transmission mode so that the second user equipment receives the downlink data.
In addition, the intelligent repeater may also determine that all the second user equipment meeting the downlink transmission condition are not involved in the downlink data, and may forward the downlink data normally.
And when the intelligent repeater determines that the downlink data does not relate to the second user equipment meeting the downlink transmission condition, amplifying the downlink data, and transmitting the amplified downlink data to the second user equipment.
When the downlink data does not relate to the second user equipment for downlink transmission configuration, the downlink sentence can be directly amplified, and the amplified downlink data is forwarded to all the second user equipment covered by the intelligent repeater.
After the second ue receives the corresponding downlink data, the second ue may further analyze and feed back the periodicity of the first downlink channel state information and the second downlink state information, so as to dynamically adjust the downlink transmission configuration. Wherein the downlink precoding indication information is carried.
In the downlink transmission method under the application scene, 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 acquire the 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, performs downlink transmission configuration on the intelligent repeater, solves the problem of downlink transmission pairing between the second user equipment in the intelligent repeater, also solves the problem of downlink transmission pairing between the second user equipment in the intelligent repeater and the first user equipment outside the intelligent repeater, assists in realizing the multi-input multi-output transmission effect of downlink multiple users, and further improves the spatial multiplexing gain and the downlink transmission performance.
In addition, the method has small influence on the terminal and good backward compatibility and deployment feasibility. The downlink transmission method in the application scene is enhanced on the existing protocol, and has small change to the existing protocol and lower realization difficulty.
Fig. 16 shows a schematic structural diagram of a downlink transmission apparatus, as shown in fig. 16, where the downlink transmission apparatus 1600 is applied to beam management, and the beam management of an access link and the beam management of a backhaul link are considered at the same time, 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 an intelligent repeater and a second user equipment, and the backhaul link is a link between a base station and the intelligent repeater, and may include: a status acquisition module 1610, a device recommendation module 1620, a downstream configuration module 1630, and a data transmission module 1640. Wherein:
A state acquisition module 1610 configured to send first downlink channel state information to the base station by the first user equipment, and send second downlink channel state information to the intelligent repeater by the second user equipment; the method comprises the steps of carrying out a first treatment on the surface of the The first user equipment is located outside the coverage area of the intelligent repeater, and the second user equipment is located in the coverage area of the intelligent repeater;
the device recommending module 1620 is configured to determine, by the intelligent repeater, the second user device 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 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 by the intelligent repeater wireless network temporary identifier to the base station, and send the second downlink channel state information to the base station; the physical uplink control channel message scrambled by the intelligent repeater wireless network temporary identifier comprises an uplink control information message, wherein the uplink control information message comprises a terminal identifier, a downlink multi-user multi-input and multi-output indication, the terminal identifier uniquely identifies a second user equipment, and the downlink multi-user multi-input and multi-output indication suggests that the downlink multi-user multi-input and multi-output are configured for the second user equipment concerned;
A downlink configuration module 1630 configured to perform downlink transmission configuration on the first user equipment according to the first downlink channel state information by the base station to obtain first downlink configuration information, and perform downlink transmission configuration on the intelligent repeater by the base station to obtain third downlink configuration information, where the downlink transmission configuration is beam management configuration; and/or
Performing downlink transmission configuration on the second user equipment meeting downlink transmission conditions according to the second downlink channel state information to obtain second downlink configuration information, and performing downlink transmission configuration on the intelligent repeater by the base station to obtain third downlink configuration information, wherein the downlink transmission configuration is beam management configuration;
the data transmission module 1640 is configured to send downlink data to the first ue and the second ue that meet a downlink transmission condition according to the first downlink configuration information and the third downlink configuration information, and/or send downlink data to the second ue that meets a downlink transmission condition according to the second downlink configuration information and the third downlink configuration information.
In an exemplary embodiment of the present invention, the first ue sends first downlink channel state information to the base station, and the second ue sends second downlink channel state information to the intelligent repeater, including:
The base station transmits downlink channel measurement configuration information according to terminal capability information of first user equipment and second user equipment, and transmits the downlink channel measurement configuration information to the first user equipment and the intelligent repeater through a radio resource control message; the downlink channel measurement configuration information comprises resource configuration information and channel state information reporting configuration information of a channel state information reference signal, the radio resource control information is a radio resource control reconfiguration message or a radio resource control recovery message, and the radio resource control information comprises a terminal identifier, channel state information resource configuration and channel state information reporting configuration;
the channel state information resource allocation comprises a channel state information identifier, a channel state information reference signal resource set list and a resource type, wherein the channel state information reference signal resource set list comprises channel state information interference measurement, a non-zero power channel state information reference signal and a synchronous block, and the resource type is an enumeration type and comprises three types of periodic, semi-static and non-periodic, and periodic measurement is taken at the moment;
the channel state information reporting configuration comprises reporting configuration identifiers, carriers, channel measurement resources, channel state information interference measurement resources, reporting type configuration, a channel quality indication table and reporting quality, wherein the reporting configuration identifiers identify the channel state information reporting configuration, the carriers are serving cell identifiers and indicate which serving cell discovers the channel state information reporting configuration information, the channel measurement resources are channel resource configuration identifiers, an integer between 1 and N is taken, N represents the maximum value of the channel state information resource configuration, the channel state information interference measurement resources are used for interference measurement, the channel resource configuration identifiers are taken, the integer between 1 and N is taken, the reporting type configuration comprises three types of periodicity, semi-statics and aperiodics, the periodicity needs to indicate reporting time slot configuration and a channel state information resource list of a physical uplink control channel, the reporting quality comprises channel quality indication, recommended precoding matrix indication, layer indication and rank indication, and the recommended precoding matrix indication is one precoding selected from a 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 issued 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: the method comprises the steps of terminal identification, channel quality indication, recommended precoding matrix indication, layer indication and rank indication, wherein the terminal identification uniquely identifies a terminal and comprises a cell wireless network temporary identification, and the recommended precoding matrix indication comprises one precoding selected from a codebook;
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, reports configuration according to the 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 wireless network temporary identifier; wherein the second downlink channel state information includes: the method comprises the steps of terminal identification, channel quality indication, recommended precoding matrix indication, layer indication and rank indication, wherein the terminal identification uniquely identifies a terminal and comprises a cell wireless network temporary identification, and the recommended precoding matrix indication comprises one precoding selected from a codebook.
In an exemplary embodiment of the present invention, 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 method further includes:
the base station acquires repeater capability information of the intelligent repeater and sends capability acquisition request information to the first user equipment and the second user equipment; the repeater capability information comprises position 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; the terminal capability information comprises a channel state information reference signal resource set list, the maximum codebook number which can be scheduled by downlink control information, the maximum multiple input multiple output layer number and a modulation and coding strategy table;
the channel state information reference signal resource set list indicates a channel state information reference signal list supported by the terminal;
the maximum codebook quantity which can be scheduled by the downlink control information is of an enumeration type;
the maximum MIMO layer number indicates the maximum MIMO layer number which can be supported by the partial bandwidth of the physical downlink shared channel;
The modulation and coding strategy table indicates a modulation and coding strategy table available for the physical downlink shared channel.
In an exemplary embodiment of the present invention, the base station performs downlink transmission configuration on the first ue and the second ue that meet downlink transmission conditions according to 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 meeting downlink transmission conditions according to 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 second user equipment meeting downlink transmission conditions according to the second downlink channel state information to obtain second downlink configuration information, and the method comprises the following steps:
and based on the repeater capability information, the base station performs downlink transmission configuration on the second user equipment meeting downlink transmission conditions according to the second downlink channel state information to obtain second downlink configuration information.
In an exemplary embodiment of the present invention, the base station issues downlink data to the first ue and the second ue that meet downlink transmission conditions according to the first downlink configuration information and the third downlink configuration information, and/or the base station issues downlink data to the second ue that meets 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 through a physical downlink control channel message scrambled by a cell wireless network temporary identifier, the physical downlink control channel message scrambled by the cell wireless network temporary identifier comprises a downlink control information message, the downlink control information message comprises precoding information, a downlink multiple-input multiple-output layer number and a modulation and coding strategy, the precoding information indicates a downlink precoding matrix, the downlink multiple-input multiple-output layer number indicates that the multiple-input multiple-output layer number is supported in a part of bandwidth where a physical downlink shared channel is located, and the modulation and coding strategy indicates physical downlink shared channel resource allocation and corresponding modulation and coding strategy;
The second downlink configuration information is sent to the intelligent repeater through a physical downlink control channel message scrambled by a cell wireless network temporary identifier, the physical downlink control channel message scrambled by the cell wireless network temporary identifier comprises a downlink control information message, the downlink control information message comprises precoding information, a downlink multiple-input multiple-output layer number and a modulation and coding strategy, the precoding information indicates a downlink precoding matrix, the downlink multiple-input multiple-output layer number indicates that the multiple-input multiple-output layer number is supported in a part of bandwidth where a physical downlink shared channel is located, and the modulation and coding strategy indicates physical downlink shared channel resource allocation and corresponding modulation and coding strategy;
the third downlink configuration information is sent to the intelligent repeater through a physical downlink control channel message scrambled by the intelligent repeater wireless network temporary identifier, the physical downlink control channel message scrambled by the intelligent repeater wireless network temporary identifier comprises a downlink control information message, the downlink control information message comprises a terminal identifier and a downlink multi-user multi-input multi-output precoding matrix, the terminal identifier uniquely identifies a second user device through a cell wireless network temporary identifier and indicates the second user device needing downlink multi-user multi-input multi-output;
The intelligent repeater station stores the third downlink configuration information, amplifies the first downlink configuration information and the second downlink configuration information and then sends the amplified first downlink configuration information and the amplified second downlink configuration information to the second user equipment which accords with downlink transmission conditions;
the base station transmits downlink data to the first user equipment and the second user equipment conforming to 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 conforming to downlink transmission conditions according to the second downlink configuration information and the third downlink configuration information.
In an exemplary embodiment of the present invention, the base station issues downlink data to the first ue and the second ue that meets a 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 ue that meets a downlink transmission condition according to the second downlink configuration information and the third downlink configuration information, including:
the base station transmits downlink data to the intelligent repeater and the first user equipment, and the intelligent repeater determines the second user equipment which is related to the downlink data and accords with downlink transmission conditions; the downlink data further comprises a terminal identifier, wherein the terminal identifier uniquely identifies second user equipment and comprises a cell wireless network temporary identifier;
The intelligent repeater transmits the downlink data to the second user equipment which is related to the downlink data and accords with a downlink transmission condition according to the first downlink configuration information and the third downlink configuration information; and/or
And the intelligent repeater transmits the downlink data to the second user equipment which is related to the downlink data and accords with the downlink transmission condition according to the second downlink configuration information and the third downlink configuration information.
In an exemplary embodiment of the present invention, after the base station issues downlink data to the intelligent repeater and the first user equipment, the method further includes:
and when the intelligent repeater determines that the downlink data does not relate to the second user equipment meeting the downlink transmission condition, amplifying the downlink data, and transmitting the amplified downlink data to the second user equipment.
The details of the downlink transmission apparatus 1600 are described in detail in the corresponding downlink transmission method, and thus are not described herein.
It should be noted that although several modules or units of the downstream transmission device 1600 are mentioned in the above detailed description, this division is not mandatory. Indeed, the features and functionality of two or more modules or units described above may be embodied in one module or unit in accordance with embodiments of the present disclosure. Conversely, the features and functions of one module or unit described above may be further divided into a plurality of modules or units to be embodied.
In addition, in an exemplary embodiment of the present disclosure, an electronic device capable of implementing the above method is also provided.
An electronic device 1700 according to such an embodiment of the invention is described below with reference to fig. 17. The electronic device 1700 shown in fig. 17 is merely an example and should not be construed as limiting the functionality and scope of use of embodiments of the present invention.
As shown in fig. 17, the electronic device 1700 is in the form of a general purpose computing device. The components of electronic device 1700 may include, but are not limited to: the at least one processing unit 1710, the at least one storage unit 1720, a bus 1730 connecting different system components (including the storage unit 1720 and the processing unit 1710), and a display unit 1740.
Wherein the storage unit stores program code that is executable by the processing unit 1710, such that the processing unit 1710 performs the steps according to various exemplary embodiments of the present invention described in the above section of the "exemplary method" of the present specification.
Storage unit 1720 may include readable media in the form of volatile storage units, such as Random Access Memory (RAM) 1721 and/or cache memory unit 1722, and may further include read only memory unit (ROM) 1723.
Storage unit 1720 may also include a program/utility 1724 having a set (at least one) of program modules 1725, such program modules 1725 including, but not limited to: an operating system, one or more application programs, other program modules, and program data, each or some combination of which may include an implementation of a network environment.
Bus 1730 may be one or more of several types of bus structures including a memory unit bus or memory unit controller, a peripheral bus, a graphics accelerator port, a processing unit, or a local bus using any of a variety of bus architectures.
The electronic device 1700 may also communicate with one or more external devices 1900 (e.g., keyboard, pointing device, bluetooth device, etc.), one or more devices that enable a user to interact with the electronic device 1700, and/or any devices (e.g., routers, modems, etc.) that enable the electronic device 1700 to communicate with one or more other computing devices. Such communication may occur through an input/output (I/O) interface 1750. Also, electronic device 1700 can communicate with one or more networks such as a Local Area Network (LAN), a Wide Area Network (WAN), and/or a public network, for example, the Internet, through network adapter 1760. As shown, network adapter 1760 communicates with other modules of electronic device 1700 via bus 1730. It should be appreciated that although not shown, other hardware and/or software modules may be used in connection with electronic device 1700, including, but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, data backup storage systems, and the like.
From the above description of embodiments, those skilled in the art will readily appreciate that the example embodiments described herein may be implemented in software, or in combination with the necessary hardware. Thus, the technical solution according to the embodiments of the present disclosure may be embodied in the form of a software product, which may be stored in a non-volatile storage medium (may be a CD-ROM, a U-disk, a mobile hard disk, etc.) or on a network, and includes several instructions to cause a computing device (may be a personal computer, a server, a terminal device, or a network device, etc.) to perform the method according to the embodiments of the present disclosure.
In an exemplary embodiment of the present disclosure, a computer-readable storage medium having stored thereon a program product capable of implementing the method described above in the present specification is also provided. In some possible embodiments, the various aspects of the invention may also be implemented in the form of a program product comprising program code for causing a terminal device to carry out the steps according to the various exemplary embodiments of the invention as described in the "exemplary methods" section of this specification, when said program product is run on the terminal device.
With reference to fig. 18, a program product 1800 for implementing the above-described method according to an embodiment of the invention is described, which may employ a portable compact disc read-only memory (CD-ROM) and comprise program code, and may run on a terminal device, such as a personal computer. However, the program product of the present invention is not limited thereto, and in this document, a readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
The program product may employ any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. The readable storage medium can be, for example, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or a combination of any of the foregoing. More specific examples (a non-exhaustive list) of the readable storage medium would include the following: an electrical connection having one or more wires, a portable disk, a hard disk, random Access Memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
The computer readable signal medium may include a data signal propagated in baseband or as part of a carrier wave with readable program code embodied therein. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination of the foregoing. A readable signal medium may also be any readable medium that is not a readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.
Program code embodied on a readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.
Program code for carrying out operations of the present invention may 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 may execute entirely on the user's computing device, partly on the user's device, as a stand-alone software package, partly on the user's computing device, partly on a remote computing device, or entirely on the remote computing device or server. In the case of remote computing devices, the remote computing device may be connected to the user computing device through any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external computing device (e.g., connected via the Internet using an Internet service provider).
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any adaptations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. 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 (10)

1. A downlink transmission method, applied to beam management, where the beam management considers beam management of an access link and beam management of a backhaul link at the same time, 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 an intelligent repeater and a second user equipment, and the backhaul link is a link between a base station and the intelligent repeater, the method includes:
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; the first user equipment is located outside the coverage area of the intelligent repeater, and the second user equipment is located in the coverage area of the intelligent repeater;
The intelligent repeater determines the second user equipment which accords with 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 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; the physical uplink control channel message scrambled by the intelligent repeater wireless network temporary identifier comprises an uplink control information message, wherein the uplink control information message comprises a terminal identifier, a downlink multi-user multi-input and multi-output indication, the terminal identifier uniquely identifies a second user equipment, and the downlink multi-user multi-input and multi-output indication suggests that the downlink multi-user multi-input and multi-output are configured for the second user equipment concerned;
the base station performs downlink transmission configuration on the first user equipment and the second user equipment meeting downlink transmission conditions 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, wherein the downlink transmission configuration is beam management configuration; and/or
The base station performs downlink transmission configuration on the second user equipment meeting downlink transmission conditions 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, wherein the downlink transmission configuration is beam management configuration;
the base station transmits downlink data to the first user equipment and the second user equipment which meet 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 which meets 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, wherein the first ue transmitting the first downlink channel state information to the base station, and the second ue transmitting the second downlink channel state information to the intelligent repeater includes:
the base station transmits downlink channel measurement configuration information according to terminal capability information of first user equipment and second user equipment, and transmits the downlink channel measurement configuration information to the first user equipment and the intelligent repeater through a radio resource control message; the downlink channel measurement configuration information comprises resource configuration information and channel state information reporting configuration information of a channel state information reference signal, the radio resource control information is a radio resource control reconfiguration message or a radio resource control recovery message, and the radio resource control information comprises a terminal identifier, channel state information resource configuration and channel state information reporting configuration;
The channel state information resource allocation comprises a channel state information identifier, a channel state information reference signal resource set list and a resource type, wherein the channel state information reference signal resource set list comprises channel state information interference measurement, a non-zero power channel state information reference signal and a synchronous block, and the resource type is an enumeration type and comprises three types of periodic, semi-static and non-periodic, and periodic measurement is taken at the moment;
the channel state information reporting configuration comprises reporting configuration identifiers, carriers, channel measurement resources, channel state information interference measurement resources, reporting type configuration, a channel quality indication table and reporting quality, wherein the reporting configuration identifiers identify the channel state information reporting configuration, the carriers are serving cell identifiers and indicate which serving cell discovers the channel state information reporting configuration information, the channel measurement resources are channel resource configuration identifiers, an integer between 1 and N is taken, N represents the maximum value of the channel state information resource configuration, the channel state information interference measurement resources are used for interference measurement, the channel resource configuration identifiers are taken, the integer between 1 and N is taken, the reporting type configuration comprises three types of periodicity, semi-statics and aperiodics, the periodicity needs to indicate reporting time slot configuration and a channel state information resource list of a physical uplink control channel, the reporting quality comprises channel quality indication, recommended precoding matrix indication, layer indication and rank indication, and the recommended precoding matrix indication is one precoding selected from a 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 issued 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: the method comprises the steps of terminal identification, channel quality indication, recommended precoding matrix indication, layer indication and rank indication, wherein the terminal identification uniquely identifies a terminal and comprises a cell wireless network temporary identification, and the recommended precoding matrix indication comprises one precoding selected from a codebook;
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, reports configuration according to the 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 wireless network temporary identifier; wherein the second downlink channel state information includes: the method comprises the steps of terminal identification, channel quality indication, recommended precoding matrix indication, layer indication and rank indication, wherein the terminal identification uniquely identifies a terminal and comprises a cell wireless network temporary identification, and the recommended precoding matrix indication comprises one precoding selected from a codebook.
3. The downlink transmission method according to claim 2, wherein before the base station issues downlink channel measurement configuration information according to terminal capability information of the first user equipment and the second user equipment, the method further comprises:
the base station acquires repeater capability information of the intelligent repeater and sends capability acquisition request information to the first user equipment and the second user equipment; the repeater capability information comprises position 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; the terminal capability information comprises a channel state information reference signal resource set list, the maximum codebook number which can be scheduled by downlink control information, the maximum multiple input multiple output layer number and a modulation and coding strategy table;
the channel state information reference signal resource set list indicates a channel state information reference signal list supported by the terminal;
the maximum codebook quantity which can be scheduled by the downlink control information is of an enumeration type;
the maximum MIMO layer number indicates the maximum MIMO layer number which can be supported by the partial bandwidth of the physical downlink shared channel;
The modulation and coding strategy table indicates a modulation and coding strategy table available for the physical downlink shared channel.
4. The downlink transmission method according to claim 3, wherein the base station performs downlink transmission configuration on the first ue and the second ue that meet downlink transmission conditions according to the first downlink channel state information and the second downlink channel state information to obtain first downlink configuration information, and includes:
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 downlink transmission conditions according to 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 second user equipment meeting downlink transmission conditions according to the second downlink channel state information to obtain second downlink configuration information, and the method comprises the following steps:
and based on the repeater capability information, the base station performs downlink transmission configuration on the second user equipment meeting downlink transmission conditions according to the second downlink channel state information to obtain second downlink configuration information.
5. The downlink transmission method according to claim 1, wherein the base station transmits downlink data to the first ue and the second ue that meet 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 ue that meets 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 through a physical downlink control channel message scrambled by a cell wireless network temporary identifier, the physical downlink control channel message scrambled by the cell wireless network temporary identifier comprises a downlink control information message, the downlink control information message comprises precoding information, a downlink multiple-input multiple-output layer number and a modulation and coding strategy, the precoding information indicates a downlink precoding matrix, the downlink multiple-input multiple-output layer number indicates that the multiple-input multiple-output layer number is supported in a part of bandwidth where a physical downlink shared channel is located, and the modulation and coding strategy indicates physical downlink shared channel resource allocation and corresponding modulation and coding strategy;
The second downlink configuration information is sent to the intelligent repeater through a physical downlink control channel message scrambled by a cell wireless network temporary identifier, the physical downlink control channel message scrambled by the cell wireless network temporary identifier comprises a downlink control information message, the downlink control information message comprises precoding information, a downlink multiple-input multiple-output layer number and a modulation and coding strategy, the precoding information indicates a downlink precoding matrix, the downlink multiple-input multiple-output layer number indicates that the multiple-input multiple-output layer number is supported in a part of bandwidth where a physical downlink shared channel is located, and the modulation and coding strategy indicates physical downlink shared channel resource allocation and corresponding modulation and coding strategy;
the third downlink configuration information is sent to the intelligent repeater through a physical downlink control channel message scrambled by the intelligent repeater wireless network temporary identifier, the physical downlink control channel message scrambled by the intelligent repeater wireless network temporary identifier comprises a downlink control information message, the downlink control information message comprises a terminal identifier and a downlink multi-user multi-input multi-output precoding matrix, the terminal identifier uniquely identifies a second user device through a cell wireless network temporary identifier and indicates the second user device needing downlink multi-user multi-input multi-output;
The intelligent repeater station stores the third downlink configuration information, amplifies the first downlink configuration information and the second downlink configuration information and then sends the amplified first downlink configuration information and the amplified second downlink configuration information to the second user equipment which accords with downlink transmission conditions;
the base station transmits downlink data to the first user equipment and the second user equipment conforming to 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 conforming to 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, wherein the base station issues downlink data to the first ue and the second ue that meets a 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 ue that meets a downlink transmission condition according to the second downlink configuration information and the third downlink configuration information, including:
the base station transmits downlink data to the intelligent repeater and the first user equipment, and the intelligent repeater determines the second user equipment which is related to the downlink data and accords with downlink transmission conditions; the downlink data further comprises a terminal identifier, wherein the terminal identifier uniquely identifies second user equipment and comprises a cell wireless network temporary identifier;
The intelligent repeater transmits the downlink data to the second user equipment which is related to the downlink data and accords with a downlink transmission condition according to the first downlink configuration information and the third downlink configuration information; and/or
And the intelligent repeater transmits the downlink data to the second user equipment which is related to the downlink data and accords with the downlink transmission condition according to the second downlink configuration information and the third downlink configuration information.
7. The downlink transmission method according to claim 6, wherein after the base station transmits downlink data to the intelligent repeater and the first user equipment, the method further comprises:
and when the intelligent repeater determines that the downlink data does not relate to the second user equipment meeting the downlink transmission condition, amplifying the downlink data, and transmitting the amplified downlink data to the second user equipment.
8. A downlink transmission apparatus, characterized by being applied to beam management, where the beam management considers beam management of an access link and beam management of a backhaul link at the same time, 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 an intelligent repeater and a second user equipment, and the backhaul link is a link between a base station and the intelligent repeater, including:
The state acquisition module is configured to send first downlink channel state information to the base station by the first user equipment and send second downlink channel state information to the intelligent repeater by the second user equipment; the first user equipment is located outside the coverage area of the intelligent repeater, and the second user equipment is located in the coverage area of the intelligent repeater;
the device recommending module is configured to determine the second user device conforming to the downlink multi-beam transmission condition according to the second downlink channel state information by the intelligent repeater, and generate a physical uplink control channel message scrambled by 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 by the intelligent repeater wireless network temporary identifier to the base station; the physical uplink control channel message scrambled by the intelligent repeater wireless network temporary identifier comprises an uplink control information message, wherein the uplink control information message comprises a terminal identifier, a downlink multi-user multi-input and multi-output indication, the terminal identifier uniquely identifies a second user equipment, and the downlink multi-user multi-input and multi-output indication suggests that the downlink multi-user multi-input and multi-output are configured for the second user equipment concerned;
The downlink configuration module is configured to perform downlink transmission configuration on the first user equipment according to the first downlink channel state information to obtain first downlink configuration information, and perform downlink transmission configuration on the intelligent repeater by the base station 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 meeting downlink transmission conditions 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, wherein the downlink transmission configuration is beam management configuration, and the downlink transmission configuration is beam management configuration;
the data transmission module is configured to send downlink data to the first user equipment and the second user equipment which meet downlink transmission conditions according to the first downlink configuration information and the third downlink configuration information, and/or send downlink data to the second user equipment which meets downlink transmission conditions according to the second downlink configuration information and the third downlink configuration information.
9. A computer readable storage medium having stored thereon a computer program, which when executed by a processor implements the downlink transmission method according to any of claims 1-7.
10. An electronic device, comprising:
a processor;
a memory for storing executable instructions of the processor;
wherein the processor is configured to perform the downstream transmission method of any one of claims 1-7 via execution of the executable instructions.
CN202210520745.5A 2022-05-12 2022-05-12 Downlink transmission method and device, storage medium and electronic equipment Pending CN117119475A (en)

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CN202210520745.5A CN117119475A (en) 2022-05-12 2022-05-12 Downlink transmission method and device, storage medium and electronic equipment

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