Relay and control method for downlink and uplink transmissions

Abstract

Relays and control methods for DL and UL transmissions between a BS and a UE are provided. In one novel aspect, a relay establishes a control link with a BS. The relay then configures an amplify-and-forward link between the BS and a UE in accordance with at least one configuration of the control link.

Description

[0001] This application is a divisional application of an international application filed in China. The original application has the application number 202180073607.0 and the application date is November 1, 2021. The invention title is "Repeater for Downlink Transmission and Uplink Transmission" (the international application has the application number PCT / CN2021 / 127913 and the invention title is "REPEATER FOR DOWNLINK TRANSMISSION AND UPLINK TRANSMISSION"). Technical Field

[0002] The disclosed implementations generally relate to wireless communication, and more particularly to repeaters for downlink and uplink transmissions. Background Technology

[0003] In conventional 3GPP 5G New Radio (NR) networks, additional base stations (BS) or integrated access and backhaul (IAB) devices can be introduced to enhance NR network coverage. However, deploying additional BS and IAB devices can be very costly. In some cases, sidelink relay nodes, which have lower deployment costs, can be introduced into the NR network to enhance network coverage. Nevertheless, some legacy UEs that do not support sidelink protocols are still not compatible with NR networks that include sidelink relay nodes.

[0004] Therefore, repeaters that are compatible with traditional UEs and have lower deployment costs can be introduced into NR networks to enhance network coverage. However, the details of introducing repeaters into NR networks have not yet been discussed, and several issues need to be addressed. Summary of the Invention

[0005] In one embodiment, a repeater and its control method are provided for downlink (DL) and uplink (UL) transmissions between a base station (BS) and user equipment (UE). Specifically, the repeater establishes a control link with the BS. Then, the repeater configures an amplify and forward (AF) link between the BS and the UE according to at least one configuration of the control link.

[0006] In some cases, the repeater: receives at least one physical (PHY) layer transmission from the BS via the AF link; and transmits the at least one physical layer transmission to the UE via the AF link according to the at least one configuration.

[0007] In some cases, the repeater: receives at least one PHY layer transmission from the BS via the AF link; updates the at least one PHY layer transmission according to the at least one configuration; and sends the at least one updated PHY layer transmission to the UE via the AF link.

[0008] Other embodiments and advantages are described in the following detailed description. This invention is not intended to be limited. The invention is defined by the claims. Attached Figure Description

[0009] The accompanying drawings illustrate embodiments of the invention, wherein similar reference numerals indicate similar components.

[0010] Figure 1 An exemplary 5G new radio network supporting repeaters for downlink and uplink transmissions is illustrated according to an embodiment of the present invention.

[0011] Figure 2 This is a simplified block diagram of a repeater according to an embodiment of the present invention.

[0012] Figure 3 An embodiment of a network link according to an embodiment of the present invention is illustrated.

[0013] Figure 4 An embodiment of the beam state associated with PHY layer transmission including SSB is illustrated according to an embodiment of the present invention.

[0014] Figure 5 An embodiment of the beam state associated with PHY layer transmission including CSI-RS according to an embodiment of the present invention is illustrated.

[0015] Figure 6 An embodiment of the beam state associated with PHY layer transmission according to an embodiment of the present invention is illustrated.

[0016] Figure 7 An embodiment of the beam state associated with PHY layer transmission including SSB is illustrated according to an embodiment of the present invention.

[0017] Figures 8A to 8D This is a flowchart of a method for a repeater for DL ​​transmission and UL transmission according to an embodiment of the present invention. Detailed Implementation

[0018] Now, reference will be made in detail to some embodiments of the present invention, examples of which are illustrated in the accompanying drawings.

[0019] Figure 1 An exemplary 5G NR network 100 supporting repeaters for DL ​​and UL transmissions according to various aspects of the present invention is illustrated. The 5G NR network 100 includes a UE 110, a repeater 121, a gNB 131, and a 5G core network 140. The UE 110 is communicatively connected to the gNB 131 via the AF function of the repeater 121 operating the access network 120. The gNB operates in a licensed frequency band (e.g., 30 GHz to 300 GHz for mmWave) of the access network 130, which provides radio access using Radio Access Technology (RAT) (e.g., 5G NR technology). The access network 130 is connected to the 5G core network 140 via an NG interface, and more specifically, to the User Plane Function (UPF) via the NG user-plane part (NG-u), and to the Mobility Management Function (AMF) via the NG control-plane part (NG-c). For load balancing and redundancy purposes, a gNB can be connected to multiple UPFs / AMFs. UE 110 can be a smartphone, wearable device, Internet of Things (IoT) device, or tablet computer, etc. Alternatively, UE 110 can be a notebook computer (NB) or personal computer (PC) with a data card inserted or installed, including a modem and RF transceiver to provide wireless communication capabilities.

[0020] gNB 131 can provide communication coverage for the geographical coverage area communicating with repeater 121. Repeater 121 can provide communication coverage for the geographical coverage area communicating with UE 110. A control link 101 as shown in the 5G NR network 100 can be established between repeater 121 and gNB 131. An AF link 102 as shown in the 5G NR network 100 can be established between UE 110 and gNB 131 via repeater 121. The control link 101 can be used to send network parameters associated with AF link 102 to control AF link 102. AF link 102 may include: UL transmission from UE 110 to gNB 131 (e.g., via Physical Uplink Control Channel (PUCCH) or Physical Uplink Shared Channel (PUSCH)), or DL ​​transmission from gNB 131 to UE 110 (e.g., via Physical Downlink Control Channel (PDCCH) or Physical Downlink Shared Channel (PDSCH)).

[0021] It should be noted that control link 101 can be used to send capability reports for both control link 101 and AF link 102 to gNB 131. The capability report for control link 101 can be related to layer 1 / layer 2 / layer 3 control information for the receiver / transmitter. The capability report for AF link 102 can be related to DL / UL multi-input multi-output (MIMO), DL / UL carrier aggregation (CA), and maximum DL / UL power gain.

[0022] The Radio Resource Control (RRC) configuration of control link 101 may be related to the following: Layer 1 / Layer 2 / Layer 3 control information for the receiver / transmitter; and the DL / UL power gain of the applied AF link 102. The measurements of maintaining control link 101 may be related to the following: Radio Resource Measurement (RRM); Radio Link Monitoring (RLM); Channel State Information (CSI); and Sounding Reference Signal (SRS).

[0023] Layer 1 control information includes: group common-PDCCH (GC-PDCCH) with time slot format indications related to control link 101 and AF link 102; DL / UL beam indications related to control link 101 and AF link 102; downlink control information (DCI) for scheduling Layer 2 / Layer 3 messages related to control link 101; UL power control commands for Layer 2 / Layer 3 messages related to control link 101; scheduling requests (SR) and hybrid automatic repeat request acknowledgements (HARQ-ACK) for Layer 2 / Layer 3 messages related to control link 101; PDCCH order maintained by timing advance (TA) of control link 101; and CSI reports and SRS of control link 101.

[0024] Layer 2 control information includes: DL / UL beam indication related to control link 101 and AF link 102; and random access response (RAR) related to control link 101. Layer 3 control information includes: L3: time-division duplex (TDD) configuration related to control link 101 and AF link 102; DL / UL beam configuration related to control link 101 and AF link 102; and other configurations related to control link 101.

[0025] Figure 2 This is a simplified block diagram of a repeater 121 according to an embodiment of the present invention. For the repeater 121, an antenna 197 transmits and receives radio signals. A radio frequency (RF) transceiver 196, connected to the antenna, receives RF signals from the antenna, converts these RF signals into baseband signals, and sends these baseband signals to a processor 193. The RF transceiver 196 also converts baseband signals received from the processor 193, converts these baseband signals into RF signals, and sends these RF signals to the antenna 197. The processor 193 processes the received baseband signals and invokes different functional modules and circuits to perform the functions in the repeater 121. A memory 192 stores program instructions and data 190 to control the operation of the repeater 121.

[0026] Repeater 121 includes several functional modules and circuits that can be implemented and configured to perform embodiments of the present invention. Figure 2In the example, repeater 121 includes a set of control function modules and circuitry 180. Transmission processing circuitry 182 processes DL / UL transmissions and associated network parameters of UE 110 and gNB 131.

[0027] It should be noted that these different functional modules and circuits can be implemented and configured through software, firmware, hardware, and any combination thereof. When executed by processor 193 (e.g., via executable program code 190), these functional modules and circuits cause repeater 121 to perform embodiments of the present invention.

[0028] Figure 3 An implementation of a network link according to a novel aspect is illustrated. Specifically, a control link 101 is established between repeater 121 and gNB 131. Control link 101 includes integration transmission and configuration transmission. An AF link 102 is established between UE 110 and gNB 131 via repeater 121. AF link 102 includes DL transmission from gNB 131 to UE 110 and UL transmission from UE 110 to gNB 131. Control link 101 can be used to transmit at least one configuration associated with AF link 102, and repeater 121 can configure AF link 102 by said at least one configuration.

[0029] In some implementations, the at least one configuration instruction repeater 121 amplifies and forwards PHY layer transmissions from gNB 131 to UE 110 without regenerating the PHY layer transmissions.

[0030] In one implementation, repeater 121 receives at least one PHY layer transmission from gNB 131 via AF link 102. The at least one PHY layer transmission may include PHY layer transmissions such as Synchronization Signal and Physical Broadcast Channel (SSB), Random Access Channel (RACH), common PDCCH, etc. (i.e., common PHY layer transmissions), and may be associated with a beam determined between gNB 131 and repeater 121. Repeater 121 then transmits the at least one PHY layer transmission to UE 110 via AF link 102 according to the at least one configuration.

[0031] For example, Figure 4An implementation of beam states associated with a PHY layer transmission including SSBs, according to a novel aspect, is illustrated. In this example, repeater 121 receives four SSBs S11 to S14 from gNB 131 via AF link 102 using corresponding beams GB11 to GB14. It is determined that beam GB13, corresponding to SSB S13, will be used between gNB 131 and repeater 121.

[0032] Then, without regenerating the SSB, repeater 121 transmits SSB S13 to UE 110 via AF link 102, according to the at least one configuration, through a predetermined direction RB10. In this example, the predetermined direction RB10 includes an omnidirectional direction, and all UEs (including UE 110) within the coverage area of ​​repeater 121 see the same strongest SSB, namely SSB S13. It should be noted that in another example, the predetermined direction may include a beam with a fixed direction between repeater 121 and UE 110.

[0033] In one implementation, repeater 121 receives multiple PHY layer transmissions from gNB 131 via AF link 102. These PHY layer transmissions may include UE-specific PDCCH, PDSCH, Channel State Information-Reference Signal (CSI-RS), etc. (i.e., UE-specific PHY layer transmissions), and may be associated with a beam determined between gNB 131 and repeater 121. Repeater 121 then transmits the PHY layer transmissions to UE 110 via AF link 102 according to the at least one configuration.

[0034] For example, Figure 5 An implementation of beam states associated with PHY layer transmission including CSI-RS, according to a novel aspect, is illustrated. In this example, beam GB23 of beams GB21 to GB24 is determined to be used between gNB 131 and repeater 121. UE 110 is configured with repetition=off in the network parameter NZP-CSI-RS-ResourceSet. Repeater 121 receives the NZP-CSI-RS-ResourceSet including CSI-RS C21 to C24 from gNB 131 via the determined beam GB23. Then, without regenerating the CSI-RS, repeater 121 transmits CSI-RS C21 to C24 to UE 110 via AF link 102 through beams RB21 to RB24.

[0035] Furthermore, repeater 121 can intercept / receive beam reports associated with beams RB21 to RB24. In one example, the beam report includes a Reference Signal Receiving Power (RSRP) beam report from UE 110 to gNB 131, and is intercepted by repeater 121. In another example, the beam report is received from gNB 131. Repeater 121 then determines at least one beam from beams RB21 to RB24 for transmission between repeater 121 and UE 110 based on the beam report.

[0036] For another example, Figure 6 An implementation of beam states associated with PHY layer transmission according to a novel aspect is illustrated. In this example, beam GB33 of beams GB31 to GB34 is determined to be used between gNB 131 and repeater 121. UE 110 is configured with usage=beamManagement in the network parameter SRS-ResourceSet. UE 110 sends an SRS-ResourceSet including SRS resources SR31 to SR34 to repeater 121 via beams UB31 to UB34.

[0037] In one example, in each of the beams RB31 to RB34, repeater 121 receives SRS resources SR31 to SR34. Repeater 121 determines at least one beam from RB31 to RB34 for UE 110 to perform transmissions based on the SRS resources SR31 to SR34.

[0038] In another example, repeater 121 receives a beam report associated with SRS resources SR31 to SR34 from gNB 131. Based on the beam report, repeater 121 determines at least one beam from UB31 to UB34 for UE 110 to perform transmissions.

[0039] In some implementations, the at least one configuration instruction repeater 121 regenerates the PHY layer transmission from gNB 131 to UE 110, and then amplifies and forwards the regenerated PHY layer transmission.

[0040] In one implementation, repeater 121 receives at least one PHY layer transmission from gNB 131 via AF link 102. The at least one PHY layer transmission may include PHY layer transmissions such as SSB, RACH, common PDCCH, etc. (i.e., common PHY layer transmissions), and may be associated with at least one beam between gNB 131 and repeater 121. Repeater 121 then updates the at least one PHY layer transmission according to the at least one configuration. Repeater 121 then transmits the updated at least one PHY layer transmission to UE 110 via AF link 102.

[0041] For example, Figure 7 An implementation of beam states associated with a PHY layer transmission including SSBs, according to a novel aspect, is illustrated. In this example, repeater 121 receives four SSBs S41 to S44 from gNB 131 via AF link 102 through corresponding beams GB41 to GB44. Repeater 121 then generates four SSBs S41' to S44' based on the SSBs S41 to S44 according to at least one configuration. SSBs S41' to S44' are associated with beams RB41 to RB44 between repeater 121 and UE 110. Repeater 121 transmits SSBs SR41' to SR44' to UE 110 via AF link 102 through beams RB41 to RB44 respectively.

[0042] In one implementation, repeater 121 receives at least one PHY layer transmission from gNB 131 via AF link 102. The at least one PHY layer transmission may include PHY layer transmissions such as UE-specific PDCCH, PDSCH, CSI-RS, etc. (i.e., UE-specific PHY layer transmissions), and may be associated with at least one beam between gNB 131 and repeater 121. Repeater 121 then updates the at least one PHY layer transmission according to the at least one configuration. Repeater 121 then transmits the updated at least one PHY layer transmission to UE 110 via AF link 102.

[0043] For example, repeater 121 receives multiple first PHY layer transmissions from gNB 131 via AF link 102. These first PHY layer transmissions include UE-specific PDCCH, PDSCH, CSI-RS, etc. (i.e., UE-specific PHY layer transmissions) and are associated with a first beam between gNB 131 and repeater 121. Then, repeater 121 generates multiple second PHY layer transmissions based on the first PHY layer transmissions according to at least one configuration. These second PHY layer transmissions are associated with multiple second beams between repeater 121 and UE 110. Repeater 121 transmits the second PHY layer transmissions to UE 110 via the second beams, respectively, through AF link 102.

[0044] In some implementations, the repeater described above may receive a pre-emptive command (e.g., downlink control information (DCI)) to prepare the repeater for the configuration of blocks associated with the AF link. For example, the repeater may be prepared to switch to a beam at the correct timing of the signal and channel transmitted by the UE.

[0045] Figures 8A to 8D This is a flowchart of a method for a repeater for DL ​​and UL transmissions according to a novel aspect. In step 801, the repeater establishes a control link with the BS. In step 802, the repeater configures the AF link between the BS and the UE according to at least one configuration of the control link.

[0046] In some implementations, after step 802, in step 803A, the repeater receives at least one PHY layer transmission from the BS via the AF link. In this case, the at least one configuration instructs the repeater to amplify and forward at least one PHY layer transmission from the BS to the UE without regenerating the PHY layer transmission. In step 804A, the repeater transmits the at least one PHY layer transmission to the UE via the AF link according to the at least one configuration.

[0047] In one example of steps 803A and 804A, the at least one PHY layer transmission includes PHY layer transmissions associated with one or more beams between the BS and the repeater (e.g., common PHY layer transmissions such as SSB, RACH, common PDCCH). The repeater receives the PHY layer transmissions from the BS via the AF link through the one or more beams. The repeater transmits the PHY layer transmissions to the UE via the AF link according to the at least one configuration in a predetermined direction.

[0048] In another example of steps 803A and 804A, the at least one PHY layer transmission includes multiple PHY layer transmissions (e.g., UE-specific PHY layer transmissions such as UE-specific PDCCH, PDSCH, CSI-RS, etc.) associated with one or more first beams between the BS and the repeater. The repeater receives the multiple PHY layer transmissions from the BS via the one or more beams through the AF link. The repeater transmits the multiple PHY layer transmissions to the UE via the AF link through one or more second beams between the repeater and the UE according to the at least one configuration.

[0049] In one scenario, the repeater receives a beam report associated with one or more second beams between the repeater and the UE. The beam report includes an RSRP beam report intercepted by the repeater from the UE to the BS, or a beam report received from the BS. The repeater then determines, based on the beam report, at least one of the one or more second beams for transmission between the repeater and the UE.

[0050] In another scenario, the UE is configured by the BS with an SRS set, which includes multiple SRS resources associated with one or more third beams between the UE and the repeater. The repeater receives SRS resources from the UE via each of the one or more second beams between the repeater and the UE, or receives beam reports associated with the SRS resources from the BS. The repeater then determines, based on the SRS resources or the beam reports, at least one beam from the one or more third beams for the UE to perform transmissions.

[0051] In some implementations, after step 802, in step 803B, the repeater receives at least one PHY layer transmission from the BS via the AF link. In this case, the at least one configuration instructs the repeater to update the at least one PHY layer transmission. In step 804B, the repeater updates the at least one PHY layer transmission according to the at least one configuration. In step 805B, the repeater transmits the at least one updated PHY layer transmission to the UE via the AF link.

[0052] In one example of steps 803B to 805B, the at least one PHY layer transmission includes multiple first PHY layer transmissions (e.g., common PHY layer transmissions such as SSB, RACH, and common PDCCH) associated with one or more first beams between the BS and the repeater. The repeater receives the first PHY layer transmissions from the BS via the one or more first beams through an AF link. The repeater updates the at least one PHY layer transmission by generating multiple second PHY layer transmissions based on the first PHY layer transmissions according to the at least one configuration. The multiple second PHY layer transmissions are associated with one or more second beams between the repeater and the UE. The repeater then transmits the second PHY layer transmissions to the UE via the one or more second beams through an AF link.

[0053] In another example of steps 803B to 805B, the at least one PHY layer transmission includes multiple first PHY layer transmissions (e.g., UE-specific PHY layer transmissions such as UE-specific PDCCH, PDSCH, CSI-RS, etc.) associated with one or more first beams between the BS and the repeater. The repeater receives the first PHY layer transmissions from the BS via the one or more first beams through an AF link. The repeater updates the at least one PHY layer transmission by generating multiple second PHY layer transmissions based on the first PHY layer transmissions according to the at least one configuration. The multiple second PHY layer transmissions are associated with one or more second beams between the repeater and the UE. The repeater then transmits the second PHY layer transmissions to the UE via the one or more second beams through an AF link.

[0054] In some implementations, after step 802, in step 803C, the repeater receives at least one PHY layer transmission from the UE via the AF link. In step 804C, the repeater transmits the at least one PHY layer transmission to the BS via the AF link according to the at least one configuration.

[0055] Although the invention has been described in conjunction with certain specific embodiments for illustrative purposes, the invention is not limited thereto. Therefore, various modifications, alterations, and combinations of features of the described embodiments can be practiced without departing from the scope of the invention as set forth in the claims.

Claims

1. A control method for a repeater used for downlink and uplink transmission, characterized in that, include: The repeater establishes a control link with the base station; The repeater configures the amplification and forwarding link between the base station and the user equipment according to at least one configuration of the control link, wherein the control link provides one or more configurations for the amplification and forwarding link, including: downlink / uplink beam indication associated with the amplification and forwarding link and time division duplex configuration associated with the control link and the amplification and forwarding link; The repeater receives at least one physical layer transmission from the base station via the amplification and forwarding link; and The repeater transmits the at least one physical layer transmission to the user equipment via the amplification and forwarding link according to the at least one configuration.

2. The control method for a repeater used for downlink and uplink transmission according to claim 1, characterized in that, The step of sending the at least one physical layer transmission to the user equipment via the amplification and forwarding link according to the at least one configuration further includes: The repeater transmits the at least one physical layer transmission to the user equipment in a predetermined direction.

3. The control method for a repeater used for downlink and uplink transmission according to claim 1, characterized in that, The step of sending the at least one physical layer transmission to the user equipment via the amplification and forwarding link according to the at least one configuration further includes: The repeater transmits the at least one physical layer transmission to the user equipment via the amplification and forwarding link through one or more beams between the repeater and the user equipment, according to the at least one configuration.

4. The control method for a repeater used for downlink and uplink transmission according to claim 1, characterized in that, The at least one physical layer transmission includes: synchronization signals and physical broadcast channel blocks, random access channels, or common physical downlink control channels.

5. The control method for a repeater used for downlink and uplink transmission according to claim 3, characterized in that, Also includes: The repeater receives beam reports associated with one or more beams between the repeater and the user equipment, wherein the beam reports include a reference signal received power beam report from the user equipment to the base station intercepted by the repeater, or the beam reports are received from the base station. as well as The repeater determines, based on the beam report, at least one of the one or more beams for transmission between the repeater and the user equipment.

6. The control method for a repeater used for downlink and uplink transmission according to claim 3, characterized in that, The user equipment is configured with a detection reference signal set, which includes multiple detection reference signal resources, and the method further includes: The repeater receives the probe reference signal resource from the user equipment via one or more beams, or receives a beam report associated with the probe reference signal resource from the base station; and The repeater determines at least one beam from the one or more beams used to perform the transmission based on the probe reference signal resource or based on the beam report.

7. The control method for a repeater used for downlink and uplink transmission according to claim 1, characterized in that, Also includes: The repeater updates the at least one physical layer transmission according to the at least one configuration.

8. The control method for a repeater used for downlink and uplink transmission according to claim 7, characterized in that, The at least one physical layer transmission includes a plurality of first physical layer transmissions associated with one or more first beams between the base station and the repeater, and the step of updating the at least one physical layer transmission according to the at least one configuration further includes: The repeater generates a plurality of second physical layer transmissions based on the first physical layer transmission according to the at least one configuration, wherein the plurality of second physical layer transmissions are associated with a plurality of second beams between the repeater and the user equipment; The method further includes: The repeater transmits the second physical layer transmission to the user equipment via the second beam through the amplification and forwarding link.

9. The control method for a repeater used for downlink and uplink transmission according to claim 3, characterized in that, The at least one physical layer transmission includes a user equipment-specific physical downlink control channel, a physical downlink shared channel, or a channel state information reference signal.

10. The control method for a repeater used for downlink and uplink transmission according to claim 1, characterized in that, Also includes: The repeater receives at least one physical layer transmission from the user equipment via the amplification and forwarding link; as well as The repeater transmits the at least one physical layer transmission to the base station via the amplification and forwarding link according to the at least one configuration.

11. A repeater for downlink and uplink transmission, characterized in that, include: Transmission processing circuit: A control link with the base station is established via a transceiver; The amplification and forwarding link between the base station and the user equipment is configured according to at least one configuration of the control link, wherein the control link provides one or more configurations for the amplification and forwarding link, including: downlink / uplink beam indication associated with the amplification and forwarding link and time-division duplex configuration associated with the control link and the amplification and forwarding link; and Transceiver: Receive at least one physical layer transmission from the base station via the amplification and forwarding link; and The at least one physical layer transmission is sent to the user equipment via the amplification and forwarding link according to the at least one configuration.

12. The repeater for downlink and uplink transmission according to claim 11, characterized in that, The transceiver is also used for: The at least one physical layer transmission is sent to the user equipment in a predetermined direction.

13. The repeater for downlink and uplink transmission according to claim 11, characterized in that, The transceiver is also used for: According to the at least one configuration, the at least one physical layer transmission is transmitted to the user equipment via the amplification and forwarding link through one or more beams between the repeater and the user equipment.

14. The repeater for downlink and uplink transmission according to claim 11, characterized in that, The at least one physical layer transmission includes: synchronization signals and physical broadcast channel blocks, random access channels, or common physical downlink control channels.

15. The repeater for downlink and uplink transmission according to claim 13, characterized in that, The transceiver is also used for: Receive beam reports associated with one or more beams between the repeater and the user equipment, wherein the beam reports include a reference signal received power beam report from the user equipment to the base station intercepted by the repeater, or the beam reports are received from the base station; The transmission processing circuit is also used for: The beam report determines at least one beam from the one or more beams used for transmission between the repeater and the user equipment.

16. The repeater for downlink and uplink transmission according to claim 13, characterized in that, The user equipment is configured with a probe reference signal set, which includes multiple probe reference signal resources. The transceiver is further configured to: The sounding reference signal resource is received from the user equipment via one or more beams, or a beam report associated with the sounding reference signal resource is received from the base station. The transmission processing circuit is also used for: At least one beam from the one or more beams used to perform the transmission is determined based on the probe reference signal resource or based on the beam report.

17. The repeater for downlink and uplink transmission according to claim 11, characterized in that, The transmission processing circuit is also used for: The at least one physical layer transport is updated according to the at least one configuration.

18. The repeater for downlink and uplink transmission according to claim 17, characterized in that, The at least one physical layer transmission includes multiple first physical layer transmissions associated with one or more first beams between the base station and the repeater, and the transmission processing circuitry is further configured to: According to the at least one configuration, a plurality of second physical layer transmissions are generated based on the first physical layer transmission, wherein the plurality of second physical layer transmissions are associated with a plurality of second beams between the repeater and the user equipment; The transceiver is also used for: The second physical layer transmission is sent to the user equipment via the second beam through the amplification and forwarding link.

19. The repeater for downlink and uplink transmission according to claim 13, characterized in that, The at least one physical layer transmission includes a user equipment-specific physical downlink control channel, a physical downlink shared channel, or a channel state information reference signal.

20. The repeater for downlink and uplink transmission according to claim 11, characterized in that, The transceiver is also used for: Receive at least one physical layer transmission from the user equipment via the amplification and forwarding link; and According to the at least one configuration, the at least one physical layer transmission is sent to the base station via the amplification and forwarding link.

21. A memory storing program instructions, characterized in that, When the program instructions are executed, they cause the repeater to perform the steps of the control method for a repeater for downlink and uplink transmission as described in any one of claims 1-10.

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