WO2024031806A1

WO2024031806A1 - Beam determination method and device for backhaul link, medium and product

Info

Publication number: WO2024031806A1
Application number: PCT/CN2022/122910
Authority: WO
Inventors: 刘敏
Original assignee: 北京小米移动软件有限公司
Priority date: 2022-08-09
Filing date: 2022-09-29
Publication date: 2024-02-15
Also published as: CN115516895A; WO2024031314A1

Abstract

The present disclosure relates to the field of communications. Disclosed are a beam determination method and device for a backhaul link, a medium and a product. The method is executed by a network controlled repeater, and comprises: determining that a beam for a backhaul link is the same as a beam of a first channel on a control link. The method enables accurate determination of a beam for a backhaul link when a plurality of candidate beams are present on a control link.

Description

Beam determination methods, devices, media and products for backhaul links

This application requires the priority of the patent application submitted on August 9, 2022, with the application number PCT/CN2022/111081, and the invention name is "Beam determination method, device, medium and product for backhaul link", and its entire content is approved by This reference is incorporated into this application.

Technical field

The present disclosure relates to the field of communications, and in particular to a beam determination method, device, medium and product for a backhaul link.

Background technique

Network Controlled Repeater (NCR) can improve system coverage in a low-cost way. NCR consists of two parts: Mobile terminal (MT) part and Forwarding (FWD) part. The MT part can be used to receive control commands on the control link sent by the access network equipment. The control commands are used to control the behavior of the FWD part, that is, the behavior on the backhaul link (backhaul link) and access link (access link). , such as beam indication direction, turning on and off of forwarding, etc.

Since both the backhaul link and the control link are links between the base station and the NCR, it is generally assumed that the backhaul link and the control link have similar channel characteristics and use the same spatial domain coding, that is, the beam. When the backhaul link and the control link transmit/receive simultaneously, the backhaul link and the control link can use the same beam. When there is only backhaul link transmission/reception between the base station and the NCR, the base station can indicate for each channel/signal separately or for multiple channels/signals, whichever case is possible due to the beam control of the link Configure multiple beams for the NCR's control link. In this scenario, how to determine the beam on the backhaul link is an issue that needs to be solved urgently.

Contents of the invention

Embodiments of the present disclosure provide a beam determination method, device, medium and product for a backhaul link. The technical solutions are as follows:

According to an aspect of an embodiment of the present disclosure, a beam determination method for a backhaul link is provided, which method includes:

Determine the beam for the backhaul link to be the same as the beam for the first channel on the control link.

According to another aspect of an embodiment of the present disclosure, a beam determination device for a backhaul link is provided, which device includes:

The determining module is used to determine the beam of the backhaul link, which is the same as the beam of the first channel on the control link.

According to another aspect of an embodiment of the present disclosure, a chip is provided. The chip includes a programmable logic circuit and/or program instructions, and when the chip is run, is used to implement the beam determination method of the backhaul link as in the above aspects.

According to another aspect of the embodiment of the present disclosure, a network control repeater is provided, the network control repeater including:

processor;

a transceiver coupled to the processor;

Wherein, the processor is configured to load and execute executable instructions to implement the beam determination method of the backhaul link in each of the above aspects.

According to another aspect of an embodiment of the present disclosure, a terminal is provided, the terminal including:

processor;

a transceiver coupled to the processor;

According to another aspect of the embodiment of the present disclosure, a computer-readable storage medium is provided, in which at least one instruction, at least a program, a code set or an instruction set is stored, at least one instruction, at least a program , the code set or the instruction set is loaded and executed by the processor to implement the beam determination method of the backhaul link as described above.

According to another aspect of an embodiment of the present disclosure, a computer program product (or computer program) is provided, the computer program product (or computer program) including computer instructions stored in a computer-readable storage medium; a computer device; The processor reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device performs the beam determination method for the backhaul link in each of the above aspects.

The technical solutions provided by the embodiments of the present disclosure may include the following beneficial effects:

In the case where there are multiple candidate beams on the control link, it can be determined that the beam on the backhaul link is the same as the beam of the first channel on the control link, thereby accurately determining the transmit beam and/or receive beam used on the backhaul link .

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present disclosure. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without exerting creative efforts.

Figure 1 is a schematic diagram of a communication system provided according to an exemplary embodiment;

Figure 2 is a flow chart of a beam determination method for a backhaul link provided according to an exemplary embodiment;

Figure 3 is a schematic diagram of a beam determination method for a backhaul link provided according to an exemplary embodiment;

Figure 4 is a flow chart of a beam determination method for a backhaul link provided according to an exemplary embodiment;

Figure 5 is a schematic diagram of a beam determination method for a backhaul link provided according to an exemplary embodiment;

Figure 6 is a flow chart of a beam determination method for a backhaul link provided according to an exemplary embodiment;

Figure 7 is a schematic diagram of a beam determination method for a backhaul link provided according to an exemplary embodiment;

Figure 8 is a flow chart of a beam determination method for a backhaul link provided according to an exemplary embodiment;

Figure 9 is a schematic diagram of a beam determination method for a backhaul link provided according to an exemplary embodiment;

Figure 10 is a flow chart of a beam determination method for a backhaul link provided according to an exemplary embodiment;

Figure 11 is a schematic diagram of a beam determination method for a backhaul link provided according to an exemplary embodiment;

Figure 12 is a flow chart of a beam determination method for a backhaul link provided according to an exemplary embodiment;

Figure 13 is a schematic diagram of a beam determination method for a backhaul link provided according to an exemplary embodiment;

Figure 14 is a flow chart of a beam determination method for a backhaul link provided according to an exemplary embodiment;

Figure 15 is a schematic diagram of a beam determination method for a backhaul link provided according to an exemplary embodiment;

Figure 16 is a block diagram of a beam determination device for a backhaul link provided according to an exemplary embodiment;

Figure 17 is a schematic structural diagram of a network control relay or terminal provided according to an exemplary embodiment;

Figure 18 is a schematic structural diagram of an access network device provided according to an exemplary embodiment.

Detailed ways

Exemplary embodiments will be described in detail herein, examples of which are illustrated in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with this application. Rather, they are merely examples of apparatus and methods consistent with aspects of the application as detailed in the appended claims. Among them, in the description of the present disclosure, unless otherwise stated, "/" means or, for example, A/B can mean A or B; "and/or" in this article is just an association describing the associated objects. Relationship means that three relationships can exist. For example, A and/or B can mean: A exists alone, A and B exist simultaneously, and B exists alone.

The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a," "" and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise. It will also be understood that the term "and/or" as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

It should be understood that although the terms first, second, third, etc. may be used in this application to describe various information, the information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of the present application, the first information may also be called second information, and similarly, the second information may also be called first information. Depending on the context, for example, the word "if" as used herein may be interpreted as "when" or "when" or "in response to determining."

In order to explain the relevant technology of this disclosure, it is necessary to first understand the concept of beams. Beams were introduced in 3GPP Rel.15, but they are not directly reflected in the standard. Instead, they are used as Transmission Configuration Indicator state (TCI state) Appears in the form, TCI state is used to represent the Quasi-Co-Location (QCL) source reference signal and the channel parameter QCL type configuration (QCL Type) that can be obtained from it. Different QCL types contain different channel characteristics, and two reference signals with QCL relationships have the same channel characteristics (channel characteristics contained in QCL type).

QCL Type A: Doppler Shift, Doppler Spread, Average Delay, Delay Spread.

QCL Type B: Doppler Shift, Doppler Spread.

QCL Type C: Average Delay, Doppler Shift.

QCL Type D: Spatial Rx parameter.

QCL Type D refers to the indicated beam information, that is, the space reception parameters. Under the assumption of beam correspondence, the spatial transmission parameters and spatial reception parameters of the user equipment are the same.

In Rel.15 and Rel.16, the beams of the downlink control channel, downlink data channel, uplink control channel, and uplink data channel are indicated separately. Considering that in many cases, the beams of these channels are the same, such separate beam instructions cause a lot of signaling redundancy, so the concept of unified TCI state (unified TCI state) was introduced in Rel.17. This unified The TCI state can be effective for the control and data channels at the same time. When using the joint TCI state (joint TCI state), unified TCI is effective for both uplink and downlink; however, there are some special cases where the downlink receive beam cannot be considered to be equivalent to the uplink transmit beam, such as When considering Maximum Permissible Exposure (MPE) or network flexibility. At this time, the concept of independent TCI state is introduced, and independent beam indication is used to indicate downlink transmission beams and uplink transmission beams to users respectively. At this time, the TCI state in unified TCI is either effective for uplink or downlink. .

For the joint/independent beam indication in Rel.17, one or more TCI states need to be activated through the Media Access Control (Media Access Control, MAC) control element (Control Element, CE). Then the user-specific downlink control information (DCI) is used to indicate one of the activated TCI states to the user. If the MAC-CE activates only one TCI state, the activated TCI state is directly used to determine the transmission beam. At the same time, a Hybrid Automatic Repeat-reQuest acknowledgment (HARQ-ack) feedback mechanism is designed for the DCI signaling of the indicated beam. In Rel.17, only DCI format 1_1/1_2 with and without scheduling information is supported for beam indication. It is required that during beam indication, the Cyclic Redundancy Check (CRC) of DCI format 1_1/1_2 without scheduling information also needs to be performed using the Configured Scheduling Radio Network Temporary Identity (CS-RNTI). Scramble. The reference point of the beam application time is the last symbol of the uplink resource for which the user equipment feeds back HARQ-ACK information.

It can be known from the background technology that there are two methods for semi-static configuration of control links:

Method 1, the beam is directed for each channel/signal separately, that is, unified TCI is not supported, such as R 15/16 users. At this time, separate signaling is required, such as the Physical Uplink Control Channel (PUCCH). ), Physical Uplink Share Channel (Physical Uplink Share Channel, PUSCH), Physical Downlink Control Channel (Physical Downlink Control Channel, PDCCH), and Physical Downlink Shared Channel (Physical Downlink Share Channel, PDSCH) are individually indicated.

Method 2, when the beam indicates multiple channels/signals, that is, users who support unified TCI, such as R17 users, multiple channels can use the same beam to indicate downlink reception and uplink transmission such as PUCCH and PUSCH. , PDCCH, and PDSCH all use one beam.

Then, whether it is mode 1 or mode 2, when configuring Radio Resource Control (RRC), it is possible to configure multiple TCIs for the MT control link. What this disclosure solves is that the backhaul link of the NCR should be the same as the control link. Which beam on the road is the same question.

Figure 1 shows a schematic diagram of a communication system provided by an exemplary embodiment of the present disclosure. The communication system may include: an access network device 12, a terminal 14 and a network control relay 16.

The access network device 12 may be a base station, and a base station is a device that provides wireless communication functions for the terminal 14. Base stations can include various forms of macro base stations, micro base stations, relay stations, access points, etc. In systems using different wireless access technologies, the names of equipment with base station functions may be different. For example, in the Long Term Evolution (LTE) system, it is called an evolved base station (eNodeB, eNB); In the 5G New Radio (NR) system, it is called the next generation base station (gNodeB, gNB). As communications technology evolves, the description "base station" may change. For convenience of description in the embodiments of the present disclosure, the above-mentioned devices that provide wireless communication functions for the terminal 14 are collectively referred to as access network equipment 12 .

The terminal 14 may include various handheld devices with wireless communication functions, vehicle-mounted devices, wearable devices, computing devices or other processing devices connected to wireless modems, as well as various forms of user equipment, mobile stations (Mobile Station, MS), Terminal device and so on. For convenience of description, the devices mentioned above are collectively called terminals.

Network control repeaters 16 can increase system coverage in a low-cost manner. The network control repeater consists of two parts, namely the MT part and the FWD part. The access network equipment sends control commands to the network control relay through the control link, and the MT part receives them. After the MT part receives the control command, the network control repeater uses the control command to control the behavior of the FWD part, that is, the behavior on the backhaul link and access link, such as beam indication direction, turning on and off forwarding, etc. in:

The control link is the link between the access network equipment and the MT part.

The backhaul link is the link between the access network equipment and the FWD part.

The access link is the link between the FWD part and the terminal. The forwarding mentioned in this disclosure refers to the forwarding related to the backhaul link. For example, the terminal sends an uplink signal to the FWD part through the access link, and the FWD part forwards the uplink signal to the access network device through the backhaul link; the access network device sends a downlink signal to the FWD part through the backhaul link, and the FWD part forwards the uplink signal through the access link. The link forwards the downlink signal to the terminal.

Figure 2 shows a flow chart of a beam determination method for a backhaul link provided by an exemplary embodiment of the present disclosure. The method is performed by the network control repeater and includes:

Step 202: Determine the beam of the backhaul link, which is the same as the beam of the first channel on the control link.

In some embodiments, the first channel includes at least one of the following:

·PDCCH;

Among them, PDCCH includes the latest PDCCH;

·PDSCH;

Among them, PDSCH includes the latest PDSCH;

·PUCCH;

Among them, PUCCH includes the latest PUCCH;

·PUSCH;

Among them, PUSCH includes the latest PUSCH.

In some embodiments, the beam of the PDCCH is determined by the Control Resource Set (CORESET) that carries the PDCCH. CORESET is designed to limit the PDCCH transmission of a terminal to a control subband, rather than within the entire system bandwidth. The time-frequency region of the PDCCH is searched more flexibly for the purpose of transmission. It can be understood that when the beam of the PDCCH is mentioned in this article, it can be regarded as the beam of the CORESET. Therefore, this method can also be understood as determining the beam of the backhaul link, which is the same as the beam of the first CORESET on the control link. The first CORESET carrying PDCCH includes at least one of the following:

·CORESET with index 0, that is, CORESET#0;

·CORESET that carries Side Control Information (SCI).

Among them, the CORESET carrying the SCI includes the CORESET carrying the latest SCI.

SCI is the information sent by the access network equipment to the NCR to control the behavior of the NCR, such as beam forming information, switch information, power control information, etc. Based on this information, NCR can perform forwarding-related actions, such as adjusting the beams used for forwarding and turning on or off forwarding at specific times.

In some embodiments, PDSCH refers to Network Control Repeater/Repeater/Mobile Terminal Dedicated Physical Downlink Shared Channel (NCR/repeater/MT-dedicated PDSCH); PUCCH refers to Network Control Repeater/Repeater/Mobile Terminal Dedicated physical uplink control channel (NCR/repeater/MT-dedicated PUCCH). Moreover, MT-dedicated can also be expressed as terminal-dedicated (UE-dedicated), because the MT itself has some UE functions. However, the UE does not refer to the terminal equipment, but to the MT.

As shown in FIG. 3 , in the control link, the access network device 12 sends the beam configuration information and/or indication information of the PDCCH (CORESET) to the network control relay 16 . Assume that the network control relay 16 is configured/instructed that beam #2 corresponding to TCI-ID #2 serves as a receiving beam to receive the PDCCH. That is, the PDCCH on the control link corresponds to beam 2.

The network control repeater 16 uses beam 2 in the backhaul link to receive the downlink signal from the access network device 12, and then forwards the downlink signal to the terminal 14 through the access link; and/or, the network control repeater 16 Beam 2 is used in the backhaul link to forward the uplink signal to the access network device 12.

To sum up, the method provided by this embodiment can determine that the beam on the backhaul link is the same as the beam of the first channel on the control link when there are multiple candidate beams on the control link, thereby accurately determining the backhaul The transmit beam and/or receive beam used on the link.

For an embodiment in which the first channel includes the first downlink channel:

Figure 4 shows a flow chart of a beam determination method for a backhaul link provided by an exemplary embodiment of the present disclosure. The method is performed by the network control repeater and includes:

Step 402: The network control relay determines the beam of the backhaul link, which is the same as the beam of the first downlink channel on the control link;

In some embodiments, the network control relay determines a receive beam for the backhaul link that is the same as the receive beam for the first downlink channel on the control link;

In some embodiments, the network control relay determines the transmit beam of the backhaul link to be the same as the receive beam of the first downlink channel on the control link.

In some embodiments, the first downlink channel may be PDCCH or PDSCH. For example, the beam of the first downlink channel is the beam of the latest PDCCH and/or PDSCH (the beam indicated by the TCI status of the latest PDSCH and/or PDCCH applied).

When the first downlink channel is the PDCCH, the beam of the PDCCH is determined by the CORESET carrying the PDCCH. It can be understood that when the beam of the PDCCH is mentioned in this article, it can be regarded as the beam of the CORESET. Therefore, this method can also be understood as determining the beam of the backhaul link, which is the same as the beam of the first CORESET on the control link. The network control relay determines the beam for the backhaul link, which is the same beam that controls the PDCCH on the link. The first CORESET carrying PDCCH includes at least one of the following:

·CORESET with index 0, that is, CORESET#0;

·Carrying SCI's CORESET.

When the first downlink channel is PDSCH, PDSCH refers to NCR/relay/MT-exclusive PDSCH. The network control relay determines the beam for the backhaul link, which is the same beam that controls the PDSCH on the link.

Step 404: The network control repeater uses the receiving beam of the first downlink channel to forward the downlink signal from the access network device to the terminal;

In some embodiments, the access network device sends a downlink signal to the NCR through the backhaul link, and the NCR forwards the downlink signal to the terminal through the access link.

In the case where the first downlink channel is the PDCCH, the NCR determines that the downlink reception beam on the backhaul link and the reception beam used for PDCCH reception on the control link are the same. In other words, the NCR uses the receiving beam of the first CORESET to receive the downlink signal.

In the case where the first downlink channel is the PDSCH, the NCR determines that the downlink reception beam on the backhaul link and the reception beam used for PDSCH reception on the control link are the same.

Step 406: The network control repeater uses the same transmit beam as the receive beam of the first downlink channel to forward the uplink signal from the terminal to the access network device.

In some embodiments, the terminal sends an uplink signal to the NCR through the access link, and the NCR forwards the uplink signal to the access network device on the backhaul link.

When the first downlink channel is PDCCH, the terminal sends an uplink signal to the NCR through the access link, and the NCR forwards the uplink signal to the access network device on the backhaul link; or in other words, the NCR uses the receiving beam of the first CORESET to send The up signal.

When the first downlink channel is the PDSCH, the terminal sends an uplink signal to the NCR through the access link, and the NCR forwards the uplink signal to the access network device on the backhaul link.

It should be noted that the execution order of the above steps 404 and 406 is not limited.

As shown in FIG. 5 , in the control link, the access network device 12 sends the beam configuration information and/or indication information of the MT-specific PDSCH to the network control relay 16 . It is assumed that the network control relay 16 is configured/instructed that the beam #2 corresponding to TCI-ID #2 serves as the receiving beam to receive the MT-exclusive PDSCH on the control link. That is, the MT-exclusive PDSCH on the control link corresponds to beam 2.

For example, in the control link, the access network device 12 sends the beam configuration information of CORESET#0 to the network control relay 16. The beam configuration information is represented by, for example, TCI-ID#2 corresponding to beam #2. Therefore, The network control repeater uses beam 2 as the receive beam to receive the CORESET #0 on the control link.

To sum up, according to the method provided by this embodiment, the receiving beam and the transmitting beam used by the network control repeater are the same beam, both of which are the beams of the first downlink channel.

For an embodiment in which the first channel includes a first downlink channel and a first uplink channel:

Figure 6 shows a flowchart of a beam determination method for a backhaul link provided by an exemplary embodiment of the present disclosure. The method is performed by the network control repeater and includes:

Step 602: The network control relay determines the beam of the backhaul link, which is the same as the beam of the first downlink channel and the first uplink channel on the control link;

In some embodiments, the network control relay determines a transmit beam for the backhaul link that is the same as the transmit beam for the first upstream channel on the control link.

In some embodiments, the first downlink channel may be PDCCH or PDSCH. Exemplarily, the beam of the first downlink channel is the beam used for the latest reception of PDCCH and/or PDSCH on the control link (the beam indicated by the applied TCI status of the latest PDCCH and/or PDSCH).

The downlink receiving beam of the backhaul link is the same as the receiving beam of the first downlink channel.

In some embodiments, the first uplink channel may be PUCCH or PUSCH. Exemplarily, the beam of the first uplink channel is the beam used for the latest PUCCH and/or PUSCH transmission on the control link (the beam indicated by the applied TCI status of the latest PUCCH and/or PUSCH).

The uplink transmission beam of the backhaul link is the same as the transmission beam of the first uplink channel.

Step 604: The network control repeater uses the receiving beam of the first downlink channel to forward the downlink signal from the access network device to the terminal;

In the case where the first downlink channel is the PDCCH, the NCR determines that the downlink reception beam on the backhaul link and the reception beam used for PDCCH reception on the control link are the same.

Step 606: The network control repeater uses the transmit beam of the first uplink channel to forward the uplink signal from the terminal to the access network device.

When the first uplink channel is the PUCCH, the terminal sends an uplink signal to the NCR through the access link, and the NCR forwards the uplink signal to the access network device on the backhaul link.

It should be noted that the execution order of the above steps 604 and 606 is not limited.

As shown in FIG. 7 , in the control link, the access network device 12 sends the beam configuration information of CORESET#0 to the network control relay 16. The beam configuration information corresponds to the beam# through TCI-ID#2, for example. 2, and the beam configuration information of PUCCH resource ID=0, which is represented by beam #3 corresponding to SRI (SRS resource indicator)-ID#3, so the network control repeater uses beam 2 as the receiving The beam receives the CORESET#0 on the control link, and beam 3 serves as the transmitting beam to send PUCCH resource ID=0 on the control link.

The network control repeater 16 uses beam 2 in the backhaul link to receive the downlink signal from the access network device 12, and then forwards the downlink signal to the terminal 14 through the access link; and/or, the network control repeater 16 Beam 3 is used in the backhaul link to forward the uplink signal to the access network device 12.

To sum up, according to the method provided by this embodiment, the receiving beam and the transmitting beam used by the network control repeater are different beams, which are the receiving beam of the first downlink channel and the transmitting beam of the first uplink channel. Therefore, in When the channels are not reciprocal, both the downlink channel and the uplink channel can achieve better working results.

Figure 8 shows a flow chart of a beam determination method for a backhaul link provided by an exemplary embodiment of the present disclosure. The method is performed by the network control repeater and includes:

The beam of the first channel is indicated by the unified TCI status;

Step 802: The network control relay determines that the beam of the backhaul link is the beam indicated by the unified TCI status;

In some embodiments, the unified TCI state includes at least one of the following:

·Joint TCI state (DLorJoint TCI state);

·Downlink independent TCI state (DLorJoint TCI state);

·Uplink independent TCI state (UL TCI state).

In some embodiments, the unified TCI state includes a joint TCI state, and the network control relay determines the receive beam of the backhaul link to be the same beam as indicated by the joint TCI state. Exemplarily, the network control relay determines the receiving beam of the backhaul link, which is the same as the beam of the joint TCI status indication most recently applied on the control link;

In some embodiments, the unified TCI state includes a joint TCI state, and the network control relay determines the transmit beam of the backhaul link to be the same beam as indicated by the joint TCI state. Exemplarily, the network control relay determines the transmission beam of the backhaul link, which is the same as the beam of the joint TCI status indication most recently applied on the control link;

In some embodiments, the unified TCI state includes a downlink independent TCI state and an uplink independent TCI state, and the network control relay determines the receive beam of the backhaul link, which is the same as the beam indicated by the downlink independent TCI state. Exemplarily, the network control relay determines the receiving beam of the backhaul link, which is the same as the beam of the downlink independent TCI status indication most recently applied on the control link;

In some embodiments, the unified TCI state includes a downlink independent TCI state and an uplink independent TCI state, and the network control relay determines the transmit beam of the backhaul link, which is the same as the beam indicated by the uplink independent TCI state. For example, the network control relay determines the transmission beam of the backhaul link, which is the same as the beam of the uplink independent TCI status indication most recently applied on the control link.

Step 804: The network control repeater uses the beam indicated by the unified TCI status to forward the downlink signal from the access network device to the terminal;

Step 806: The network control repeater uses the beam indicated by the unified TCI status to forward the uplink signal from the terminal to the access network device.

It should be noted that the execution order of the

above steps

804 and 806 is not limited.

As shown in FIG. 9 , in the control link, the access network device 12 sends the configuration and/or indication information of the unified TCI state to the network control relay 16. The unified TCI state is used to indicate beam 2. That is, the unified TCI state on the control link corresponds to beam 2.

In summary, the method provided by this embodiment can determine that the beam on the backhaul link is the same as the beam indicated by the unified TCI status on the control link when there are multiple candidate beams on the control link, thereby accurately Determine the transmit beam and/or receive beam used on the backhaul link.

An example of a unified TCI state including a combined TCI state:

Figure 10 shows a flowchart of a beam determination method for a backhaul link provided by an exemplary embodiment of the present disclosure. The method is performed by the network control repeater and includes:

Step 1002: The network control relay determines that the beam of the backhaul link is the beam indicated by the joint TCI status;

In some embodiments, the network control relay determines the receive beam of the backhaul link to be the same beam as the joint TCI status indication. Exemplarily, the network control relay determines the receiving beam of the backhaul link, which is the same as the beam of the joint TCI status indication most recently applied on the control link;

In some embodiments, the network control relay determines the transmit beam of the backhaul link to be the same beam as the joint TCI status indication. For example, the network control relay determines the transmission beam of the backhaul link, which is the same as the beam of the joint TCI status indication last applied on the control link.

In some embodiments, the access network device first uses Radio Resource Control (RRC) to configure the list "DLorJoint-TCI State" to the network control repeater. The list "DLorJoint-TCI State" includes multiple TCI states. The access network device then uses MAC CE and/or DCI to indicate a joint TCI state to the network control relay. The joint TCI state is one of multiple TCI states corresponding to the list "DLorJoint-TCI State".

Step 1004: The network control repeater uses the beam combined with the TCI status indication to forward the downlink signal from the access network device to the terminal;

Step 1006: The network control repeater uses the beam combined with the TCI status indication to forward the uplink signal from the terminal to the access network device.

It should be noted that the execution order of the above steps 1004 and 1006 is not limited.

As shown in FIG. 11 , in the control link, the access network device 12 sends the configuration and/or indication information of the joint TCI state to the network control relay 16 , and the joint TCI state is used to indicate beam 2. That is, the joint TCI state on the control link corresponds to beam 2.

To sum up, according to the method provided by this embodiment, the receiving beam and the transmitting beam used by the network control repeater are the same beam, and both are beams combined with TCI status indication, so the implementation complexity of the solution can be reduced.

An example in which the unified TCI state includes a downlink independent TCI state and an uplink independent TCI state:

Figure 12 shows a flowchart of a beam determination method for a backhaul link provided by an exemplary embodiment of the present disclosure. The method is performed by the network control repeater and includes:

The beam of the first channel is indicated by the unified TCI state, which includes the downlink independent TCI state and the uplink independent TCI state;

Step 1202: The network control relay determines that the beam of the backhaul link is the beam indicated by the downlink independent TCI state and the uplink independent TCI state;

In some embodiments, the network control relay determines the receive beam of the backhaul link to be the same beam as the downlink independent TCI status indication. Exemplarily, the network control relay determines the receiving beam of the backhaul link, which is the same as the beam of the downlink independent TCI status indication most recently applied on the control link;

In some embodiments, the network control relay determines the transmit beam for the backhaul link to be the same beam as the upstream independent TCI status indication. For example, the network control relay determines the transmission beam of the backhaul link, which is the same as the beam of the uplink independent TCI status indication most recently applied on the control link.

Step 1204: The network control repeater uses the beam indicated by the downlink independent TCI status to forward the downlink signal from the access network device to the terminal;

Step 1206: The network control repeater uses the beam indicated by the uplink independent TCI status to forward the uplink signal from the terminal to the access network device.

In some embodiments, the access network device first uses the RRC configuration list "DLorJoint-TCI State" to the network control repeater. The list "DLorJoint-TCI State" includes multiple TCI states, and then the access network device uses the MAC CE and /or DCI indicates a downlink independent TCI state to the network control repeater, and the downlink independent TCI state is one of multiple TCI states corresponding to the list "DLorJoint-TCI State".

In some embodiments, the access network device first uses the RRC configuration list "UL TCI state" to the network control repeater. The list "UL TCI state" includes multiple TCI states, and then the access network device uses the MAC CE and/or The DCI indicates an uplink independent TCI state to the network control repeater. The uplink independent TCI state is one of multiple TCI states corresponding to the list "UL TCI state".

It should be noted that the execution order of the above steps 1204 and 1206 is not limited.

As shown in Figure 13, in the control link, the access network device 12 sends the configuration and/or indication information of the downlink independent TCI state to the network control relay 16, and receives the configuration and/or indication information of the uplink independent TCI state. Instruction information, the downlink independent TCI state on the control link corresponds to beam 2, and the uplink independent TCI state corresponds to beam 3.

To sum up, according to the method provided by this embodiment, the receiving beam and the transmitting beam used by the network control repeater are different beams, which are the receiving beam for the downlink independent TCI status indication and the transmitting beam for the uplink independent TCI status indication. Therefore, When the channels are not reciprocal, both the downlink channel and the uplink channel can achieve better working results.

Figure 14 shows a flowchart of a beam determination method for a backhaul link provided by an exemplary embodiment of the present disclosure. The method is performed by the network control repeater and includes:

Step 1402: In the case where the beam of the first channel is instructed to be updated and the update has not yet been applied, the network control relay performs steps related to determining the beam of the backhaul link;

Assume that the access network device indicates to the network control relay that the beam update of the first channel is the first time, and the completion time of the beam update of the first channel is the second time, then the second time is usually later than the first time. The network control repeater performs at least one of the following steps related to determining the beam of the backhaul link:

·Determine the beam of the backhaul link as the default beam;

·Keep the beam of the backhaul link unchanged from the beam used before the above update is applied;

· Make sure that the beam of the backhaul link always follows the beam of the first channel.

As shown in FIG. 15 , the network control relay receives the DCI without data scheduling at time t1, and the DCI without data scheduling is used to indicate the beam update of the first channel. The network control relay applies the new beam after feeding back n symbols (t3) after the last symbol (t2) of the HARQ feedback for this DCI. The specific value of n is indicated by the access network device.

In some embodiments, between the first time (t1) and the second time (t3), the network control relay determines that the beam of the backhaul link is the default beam. The default beam is predefined, or preconfigured, or configured or specified by the access network device. For example, access network equipment is configured or specified in advance through RRC signaling.

In some embodiments, between the first time (t1) and the second time (t3), the network control relay keeps the beam of the backhaul link unchanged from the beam used before the above update is applied. For example, even if between the first time (t1) and the second time (t3), if the beam of the first channel undergoes other changes and is different from the beam used before the above update is applied, the network control repeater still maintains The beam for the backhaul link remains unchanged from the beam used before the above update was applied.

In some embodiments, between the first time (tl) and the second time (t3), the network control relay determines that the beam of the backhaul link always follows the beam of the first channel. For example, even between the first time (t1) and the second time (t3), if the beam of the first channel undergoes other changes and is different from the beam used before the above update application, then the network control relay determines The beam of the backhaul link always follows the beam of the first channel.

Figure 16 shows a block diagram of a beam determination device for a backhaul link provided by an exemplary embodiment of the present disclosure. The device includes:

The determining module 1610 is used to determine the beam of the backhaul link, which is the same as the beam of the first channel on the control link.

In a possible design of this embodiment, the first channel includes at least one of the following:

Physical downlink control channel PDCCH; wherein, PDCCH includes the latest PDCCH;

Physical downlink shared channel PDSCH; where PDSCH includes the latest PDSCH;

Physical uplink control channel PUCCH; where PUCCH includes the most recent PUCCH;

Physical uplink shared channel PUSCH; where PUSCH includes the latest PUSCH.

In a possible design of this embodiment, the beam of the PDCCH is determined by the CORESET carrying the PDCCH. The CORESET carrying the PDCCH includes at least one of the following:

CORESET with index 0;

Hosting SCI's CORESET.

In a possible design of this embodiment, the CORESET carrying the SCI includes the CORESET carrying the latest SCI;

In a possible design of this embodiment, the first channel includes a first downlink channel;

The installation also includes:

The first receiving module is used to determine the receiving beam of the backhaul link, which is the same as the receiving beam of the first downlink channel on the control link. In some embodiments, the beam of the first downlink channel is the beam of the most recent PDCCH and/or PDSCH (the beam indicated by the TCI status of the most recent PDSCH and/or PDCCH applied);

The first sending module is used to determine the sending beam of the backhaul link, which is the same as the receiving beam of the first downlink channel on the control link. In some embodiments, the beam of the first downlink channel is the beam of the most recent PDCCH and/or PDSCH (the beam indicated by the TCI status to which the most recent PDSCH and/or PDCCH has been applied).

In a possible design of this embodiment, the first channel includes a first downlink channel and a first uplink channel;

The installation also includes:

The second receiving module is used to determine the receiving beam of the backhaul link, which is the same as the receiving beam of the first downlink channel on the control link. In some embodiments, the beam of the first downlink channel is the beam used for the most recent reception of the PDCCH and/or PDSCH on the control link (the beam indicated by the applied TCI status of the most recent PDCCH and/or PDSCH);

The second sending module is used to determine the sending beam of the backhaul link, which is the same as the sending beam of the first uplink channel on the control link. In some embodiments, the beam of the first uplink channel is the beam used for the most recent transmission of PUCCH and/or PUSCH on the control link (the beam indicated by the applied TCI status of the most recent PUCCH and/or PUSCH).

In a possible design of this embodiment, the beam of the first channel is indicated by the TCI status;

Determine the beam for the backhaul link, which is the same as the beam for the first channel on the control link, including:

It is determined that the beam of the backhaul link is the beam indicated by the unified TCI status.

In a possible design of this embodiment, the unified TCI state is a combined TCI state;

The installation also includes:

The third receiving module is used to determine the receiving beam of the backhaul link, which is the same as the beam of the joint TCI status indication. In some embodiments, determining the receive beam of the backhaul link is the same as the beam of the joint TCI status indication most recently applied on the control link;

The third sending module is used to determine the sending beam of the backhaul link, which is the same as the beam of the joint TCI status indication. In some embodiments, the transmit beam of the backhaul link is determined to be the same beam as the joint TCI status indication most recently applied on the control link.

In a possible design of this embodiment, the unified TCI state includes a downlink independent TCI state and an uplink independent TCI state;

The installation also includes:

The fourth receiving module is used to determine the receiving beam of the backhaul link, which is the same as the beam of the downlink independent TCI status indication. In some embodiments, the receive beam of the backhaul link is determined to be the same as the beam of the last downlink independent TCI status indication applied on the control link;

The fourth sending module is used to determine the sending beam of the backhaul link, which is the same as the beam of the uplink independent TCI status indication. In some embodiments, the transmit beam of the backhaul link is determined to be the same as the beam of the last uplink independent TCI status indication applied on the control link.

In a possible design of this embodiment, the device further includes:

A fifth determination module, configured to determine that the beam of the backhaul link is the default beam when the beam of the first channel is instructed to be updated and the update has not yet been applied;

or,

A fifth maintenance module, configured to keep the beam of the backhaul link unchanged from the beam used before the update is applied, when the beam of the first channel is instructed to be updated and the update has not yet been applied;

or,

A sixth determination module, configured to determine that the beam of the backhaul link always follows the beam of the first channel when the beam of the first channel is instructed to be updated and the update has not yet been applied.

In a possible design of this embodiment, the default beam is configured by the access network device.

In a possible design of this embodiment, the completion time of the beam update on the backhaul link and the completion time of the beam on the control link are the same time.

Figure 17 shows a schematic structural diagram of a network control relay or terminal 1700 provided by an exemplary embodiment of the present disclosure. The network control relay or terminal includes: a processor 1701, a receiver 1702, a transmitter 1703, and a memory 1704 and bus 1705.

The processor 1701 includes one or more processing cores. The processor 1701 executes various functional applications and information processing by running software programs and modules.

The receiver 1702 and the transmitter 1703 can be implemented as a communication component, and the communication component can be a communication chip.

Memory 1704 is connected to processor 1701 through bus 1705.

The memory 1704 can be used to store at least one instruction, and the processor 1701 is used to execute the at least one instruction to implement each step in the above method embodiment.

Additionally, memory 1704 may be implemented by any type of volatile or non-volatile storage device, or combination thereof, including but not limited to: magnetic or optical disks, electrically erasable programmable Read-only memory (EEPROM, Electrically Erasable Programmable Read Only Memory), Erasable Programmable Read-Only Memory (EPROM, Erasable Programmable Read Only Memory), Static Random-Access Memory (SRAM, Static Random-Access Memory), Read-Only Memory (ROM, Read Only Memory), magnetic memory, flash memory, programmable read-only memory (PROM, Programmable Read Only Memory).

In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions, such as a memory including instructions, is also provided, and the above instructions can be executed by a processor of the terminal to complete the above-mentioned beam determination method for the backhaul link. For example, non-transitory computer-readable storage media can be ROM, random access memory (RAM, Random-Access Memory), compact disc read-only memory (CD-ROM, Compact Disc Read Only Memory), magnetic tape, floppy disk and optical data Storage devices, etc.

Figure 18 is a block diagram of an access network device 1800 according to an exemplary embodiment. The access network device 1800 may be a base station.

The access network device 1800 may include: a processor 1801, a receiver 1802, a transmitter 1803, and a memory 1804. The receiver 1802, the transmitter 1803 and the memory 1804 are respectively connected to the processor 1801 through a bus.

The processor 1801 includes one or more processing cores, and the processor 1801 executes the beam determination method for the backhaul link provided by the embodiment of the present disclosure by running software programs and modules. Memory 1804 may be used to store software programs and modules. Specifically, the memory 1804 can store the operating system 18041 and at least one application module 18042 required for the function. The receiver 1802 is used to receive communication data sent by other devices, and the transmitter 1803 is used to send communication data to other devices.

An exemplary embodiment of the present disclosure also provides a computer-readable storage medium. The computer-readable storage medium stores at least one instruction, at least a program, a code set or an instruction set. At least one instruction, at least a program, a code set. Or the instruction set is loaded and executed by the processor to implement the beam determination method for the backhaul link provided by each of the above method embodiments.

An exemplary embodiment of the present disclosure also provides a computer program product. The computer program product includes computer instructions. The computer instructions are stored in a computer-readable storage medium. The processor of the computer device reads the computer instructions from the computer-readable storage medium. , the processor executes computer instructions, causing the computer device to execute the beam determination method for the backhaul link as provided by each of the above method embodiments.

It should be understood that "plurality" mentioned in this article means two or more. Other embodiments of the disclosure will be readily apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. The present disclosure is intended to cover any variations, uses, or adaptations of the disclosure that follow the general principles of the disclosure and include common common sense or customary technical means in the technical field that are not disclosed in the disclosure. . 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.

It is to be understood that the present disclosure is not limited to the precise structures described above and illustrated in the accompanying drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the disclosure is limited only by the appended claims.

Claims

A beam determination method for a backhaul link, characterized in that the method is executed by a network control relay, and the method includes:

The beam of the backhaul link is determined to be the same as the beam of the first channel on the control link.
The method according to claim 1, characterized in that the first channel includes at least one of the following:

Physical downlink control channel PDCCH;

Physical downlink shared channel PDSCH;

Physical uplink control channel PUCCH;

Physical uplink shared channel PUSCH.
The method according to claim 2, characterized in that the beam of the PDCCH is determined by the control resource set CORESET carrying the PDCCH, and the CORESET carrying the PDCCH includes at least one of the following:

CORESET with index 0;

CORESET carrying side control information SCI.
The method according to claim 3, characterized in that the CORESET of the bearer-side control information SCI includes:

CORESET carrying the most recent SCI.
The method according to any one of claims 1 to 4, characterized in that the first channel includes a first downlink channel;

Determining the beam of the backhaul link is the same as the beam of the first channel on the control link, including:

Determine that the receiving beam of the backhaul link is the same as the receiving beam of the first downlink channel on the control link;

It is determined that the transmit beam of the backhaul link is the same as the receive beam of the first downlink channel on the control link.
The method according to any one of claims 1 to 4, characterized in that the first channel includes a first downlink channel and a first uplink channel;

Determining the beam of the backhaul link is the same as the beam of the first channel on the control link, including:

Determine that the receiving beam of the backhaul link is the same as the receiving beam of the first downlink channel on the control link;

The transmission beam of the backhaul link is determined to be the same as the transmission beam of the first uplink channel on the control link.
The method according to any one of claims 1 to 4, characterized in that the beam of the first channel is indicated by a unified transmission configuration indication TCI status;

Determining the beam of the backhaul link is the same as the beam of the first channel on the control link, including:

It is determined that the beam of the backhaul link is the beam indicated by the unified TCI status.
The method according to claim 7, characterized in that the unified TCI state is a joint TCI state;

Determining the beam of the backhaul link is the same as the beam of the first channel on the control link, including:

Determine that the receiving beam of the backhaul link is the same as the beam of the joint TCI status indication;

The transmission beam of the backhaul link is determined to be the same as the beam of the joint TCI status indication.
The method according to claim 7, characterized in that the unified TCI state includes a downlink independent TCI state and an uplink independent TCI state;

Determining the beam of the backhaul link is the same as the beam of the first channel on the control link, including:

Determine that the receiving beam of the backhaul link is the same as the beam of the downlink independent TCI status indication;

The transmission beam of the backhaul link is determined to be the same as the beam of the uplink independent TCI status indication.
The method according to any one of claims 1 to 9, characterized in that the method further includes:

In the case where the beam of the first channel is instructed to be updated and the update has not yet been applied, determining the beam of the backhaul link to be the default beam;

or,

In the case where the beam of the first channel is instructed to be updated and the update has not yet been applied, keeping the beam of the backhaul link unchanged from the beam used before the update was applied;

or,

In the case where the beam of the first channel is instructed to update and the update has not yet been applied, it is determined that the beam of the backhaul link always follows the beam of the first channel.
The method according to claim 10, characterized in that the default beam is configured by an access network device.
The method according to claim 10, characterized in that the completion time of the beam update on the backhaul link and the completion time of the beam on the control link are the same time.
A beam determination device for a backhaul link, characterized in that the device includes:

A determining module, configured to determine the beam of the backhaul link, which is the same as the beam of the first channel on the control link.
A network control repeater, characterized in that the network control repeater includes:

processor;

a transceiver coupled to said processor;

Wherein, the processor is configured to load and execute executable instructions to implement the beam determination method for the backhaul link according to any one of claims 1 to 12.
A terminal, characterized in that the terminal includes:

processor;

a transceiver coupled to said processor;

Wherein, the processor is configured to load and execute executable instructions to implement the beam determination method for the backhaul link according to any one of claims 1 to 12.
A chip, characterized in that the chip includes a programmable logic circuit and/or program instructions, and when the chip is run, it is used to implement the beam determination method of the backhaul link according to any one of claims 1 to 12.
A computer-readable storage medium, characterized in that at least one instruction, at least one program, a code set or an instruction set is stored in the computer-readable storage medium, and the at least one instruction, the at least one program, the The code set or instruction set is loaded and executed by the processor to implement the beam determination method for the backhaul link as claimed in any one of claims 1 to 12.
A computer program product, characterized in that the computer program product includes computer instructions, and the computer instructions are stored in a computer-readable storage medium; and a processor of the computer device reads the instructions from the computer-readable storage medium. Computer instructions, the processor executes the computer instructions, causing the computer device to execute the beam determination method for the backhaul link according to any one of claims 1 to 12.