CN-116508270-B - Relay for downlink transmission and uplink transmission and control method

Abstract

A repeater for downlink transmission and uplink transmission and a control method. A repeater and a control method for DL transmission and UL transmission between a BS and a UE are provided. In a novel aspect, a repeater establishes a control link with a BS. The repeater then configures an amplification and forwarding link between the BS and the UE according to at least one configuration of the control link.

Inventors

• CAI CHENGRONG
• LIAO PEIKAI
• XU JIAJUN
• Francis Boyd sadara - Esther Parkes
• Bo Joe Michael Conson
• Yu Cangwei

Assignees

• 联发科技（新加坡）私人有限公司

Dates

Publication Date

20260505

Application Date

20211101

Priority Date

20201030

Claims (20)

1. 1. A control method of a repeater, comprising: The repeater establishes a control link with the base station; Configuring, by the repeater, an amplification and forwarding link between the base station and 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 a group common physical downlink control channel for a slot format, scheduling downlink control information for layer 2/layer 3 messages related to the control link, uplink power control commands for layer 2/layer 3 messages related to the control link, scheduling requests and hybrid automatic repeat request acknowledgements for layer 2/layer 3 messages related to the control link, physical downlink control channel order for timing advance maintenance of the control link; The repeater receiving at least one physical layer transmission from the base station via the amplify and forward link, and The repeater sends the at least one physical layer transmission to the user equipment via the amplify-and-forward link according to the at least one configuration.
2. 2. The method of claim 1, wherein the step of sending the at least one physical layer transmission to the user device via the amplify-and-forward link according to the at least one configuration further comprises: the repeater sends the at least one physical layer transmission to the user equipment in a predetermined direction.
3. 3. The method of claim 1, wherein the step of sending the at least one physical layer transmission to the user device via the amplify-and-forward link according to the at least one configuration further comprises: The repeater sends the at least one physical layer transmission to the user equipment via the amplify-and-forward link over one or more beams between the repeater and the user equipment according to the at least one configuration.
4. 4. The method of claim 1, wherein the at least one physical layer transmission comprises a synchronization signal and a physical broadcast channel block, a random access channel, or a common physical downlink control channel.
5. 5. The control method of a repeater according to claim 3, further comprising: The repeater receiving a beam report associated with the one or more beams between the repeater and the user equipment, wherein the beam report includes a reference signal received power beam report from the user equipment to the base station intercepted by the repeater or the beam report is received from the base station, and The repeater determines at least one of the one or more beams for transmission between the repeater and the user equipment from the beam report.
6. 6. A method of controlling a repeater according to claim 3, wherein the user equipment is configured with a set of sounding reference signals, the set of sounding reference signals comprising a plurality of sounding reference signal resources, and the method further comprises: the relay receiving the sounding reference signal resources from the user equipment over the one or more beams or receiving a beam report associated with the sounding reference signal resources from the base station, and The relay determines at least one beam of the one or more beams for performing transmission from the sounding reference signal resource or from the beam report.
7. 7. The control method of a repeater according to claim 1, further comprising: The repeater updates the at least one physical layer transmission according to the at least one configuration.
8. 8. The method of claim 7, wherein the at least one physical layer transmission comprises a plurality of first physical layer transmissions associated with one or more first beams between the base station and the repeater, and wherein updating the at least one physical layer transmission according to the at least one configuration further comprises: generating, by the repeater, 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 comprises the steps of: The repeater sends the second physical layer transmission to the user equipment over the second beam via the amplify and forward link.
9. 9. A method of controlling a repeater according to claim 3, wherein the at least one physical layer transmission comprises a user equipment specific physical downlink control channel, a physical downlink shared channel or a channel state information reference signal.
10. 10. The control method of a repeater according to claim 1, further comprising: The repeater receiving at least one physical layer transmission from the user equipment via the amplify and forward link, and The repeater sends the at least one physical layer transmission to the base station via the amplify-and-forward link according to the at least one configuration.
11. 11.A repeater for downlink and uplink transmissions, comprising: transceiver, and The transmission processing circuit: Establishing a control link with a base station via the transceiver; Configuring an amplification and forwarding link between the base station and 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 a group common physical downlink control channel for a slot format, scheduling downlink control information for layer 2/layer 3 messages related to the control link, uplink power control commands for layer 2/layer 3 messages related to the control link, scheduling request and hybrid automatic repeat request acknowledgements for layer 2/layer 3 messages related to the control link, physical downlink control channel order for timing advance maintenance for the control link, and The transceiver: receiving at least one physical layer transmission from the base station via the amplify and forward link, and The at least one physical layer transmission is sent to the user equipment via the amplify-and-forward link according to the at least one configuration.
12. 12. The repeater of claim 11, wherein the transceiver is further configured to: And transmitting the at least one physical layer transmission to the user equipment through a predetermined direction.
13. 13. The repeater of claim 11, wherein the transceiver is further configured to: the at least one physical layer transmission is sent to the user equipment via the one or more beams between the repeater and the user equipment via the amplify-and-forward link according to the at least one configuration.
14. 14. The repeater of claim 11, wherein the at least one physical layer transmission comprises a synchronization signal and a physical broadcast channel block, a random access channel, or a common physical downlink control channel.
15. 15. The repeater of claim 13, wherein the transceiver is further configured to: Receiving a beam report associated with the one or more beams between the repeater and the user equipment, wherein the beam report includes a reference signal received power beam report intercepted by the repeater from the user equipment to the base station or the beam report is received from the base station; wherein the transmission processing circuit is further configured to: At least one of the one or more beams for transmission between the repeater and the user equipment is determined from the beam report.
16. 16. The repeater according to claim 13, wherein the user equipment is configured with a set of sounding reference signals, the set of sounding reference signals comprising a plurality of sounding reference signal resources, the transceiver further configured to: Receiving the sounding reference signal resources from the user equipment over the one or more beams or receiving a beam report associated with the sounding reference signal resources from the base station; wherein the transmission processing circuit is further configured to: At least one beam of the one or more beams for performing transmissions is determined from the sounding reference signal resources or from the beam reports.
17. 17. The repeater of claim 11, wherein the transmission processing circuit is further configured to: updating the at least one physical layer transmission according to the at least one configuration.
18. 18. The repeater according to claim 17, wherein 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 transmission processing circuit is further configured to: generating 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 transceiver is also for: the second physical layer transmission is sent to the user equipment over the second beam via the amplify and forward link.
19. 19. The repeater according to claim 13, wherein 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. 20. The repeater of claim 11, wherein the transceiver is further configured to: receiving at least one physical layer transmission from the user equipment via the amplify and forward link, and The at least one physical layer transmission is sent to the base station via the amplify-and-forward link according to the at least one configuration.

Description

Relay for downlink transmission and uplink transmission and control method Cross reference The subject matter of U.S. provisional application serial No. 63/107,558, filed on 10/30/2020, entitled "SMART REPEATERS" is hereby incorporated by reference herein. Technical Field The disclosed embodiments relate generally to wireless communications and, more particularly, to a repeater (repeater) for downlink and uplink transmissions. Background In a conventional network of the third generation partnership project (3rd generation partnership project,3GPP) 5G New Radio (NR), additional Base Station (BS) or Integrated Access and Backhaul (IAB) devices may be introduced in order to enhance the coverage of the NR network communication. However, the cost of deploying additional BS and IAB devices can be very high. In some cases, a sidelink relay node (SIDELINK RELAY node) with lower deployment costs may be introduced in the NR network to enhance the coverage of the network communication. Nevertheless, some legacy UEs that do not support the sidelink protocol are still not compliant with the NR network that includes the sidelink relay node. Accordingly, a repeater compatible with legacy UEs and lower deployment costs may be introduced in NR networks to enhance the coverage of network communications. However, the details of introducing repeaters in the NR network have not been discussed and some problems need to be solved. Disclosure of Invention In one embodiment, a repeater for Downlink (DL) transmission and Uplink (UL) transmission between a Base Station (BS) and a User Equipment (UE) and a control method thereof are provided. Specifically, the repeater establishes a control link with the BS. The repeater then configures an Amplify and Forward (AF) link between the BS and the UE according to at least one configuration of the control link. In some cases, a repeater receives at least one Physical (PHY) layer transmission from a BS via an AF link, and sends the at least one physical layer transmission to a UE via the AF link according to the at least one configuration. In some cases, a repeater receives at least one PHY layer transmission from a BS via an 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 a UE via the AF link. Other embodiments and advantages are described in the detailed description that follows. This summary is not intended to limit the invention. The invention is defined by the claims. Drawings The accompanying drawings illustrate embodiments of the invention in which like numerals refer to like elements. Fig. 1 illustrates an exemplary 5G new radio network supporting repeaters for downlink and uplink transmissions according to an embodiment of the present invention. Fig. 2 is a simplified block diagram of a repeater according to an embodiment of the present invention. Fig. 3 illustrates one embodiment of a network link according to an embodiment of the present invention. Fig. 4 illustrates one embodiment of beam states associated with PHY layer transmissions including SSBs in accordance with an embodiment of the invention. Fig. 5 illustrates one embodiment of beam states associated with PHY layer transmission including CSI-RS according to an embodiment of the invention. Fig. 6 illustrates one embodiment of beam states associated with PHY layer transmissions in accordance with an embodiment of the invention. Fig. 7 illustrates one embodiment of beam states associated with PHY layer transmissions including SSBs, according to an embodiment of the invention. Fig. 8A to 8D are flowcharts of a method of a repeater for DL transmission and UL transmission according to an embodiment of the present invention. Detailed Description Reference will now be made in detail to some embodiments of the invention, examples of which are illustrated in the accompanying drawings. Fig. 1 illustrates an exemplary 5G NR network 100 supporting repeaters for DL transmissions and UL transmissions in accordance with aspects of the present invention. The 5G NR network 100 includes a UE 110, a repeater 121, a gNB 131, and a 5G core network 140. UE 110 is communicatively connected to a gNB 131 that operates in a licensed band (e.g., 30 ghz-300 ghz for mmWave) of access network 130 that provides radio access using a wireless access technology (Radio Access Technology, RAT) (e.g., 5G NR technology) via an AF function that operates a repeater 121 of access network 120. The access network 130 is connected to the 5G core network 140 by means of an NG interface, more specifically to the user plane functions (User Plane Function, UPF) by means of an NG user-PLANE PART, NG-u and to the mobility management functions (Mobility Management Function, AMF) by means of an NG control plane part (NG control-PLANE PART, NG-c). One gNB may be connected to multiple UPF/AMFs for load sharing and redundancy purposes. UE 110 may be a smart phone,