WO2022011505A1

WO2022011505A1 - Beam management method, apparatus and device, and storage medium

Info

Publication number: WO2022011505A1
Application number: PCT/CN2020/101656
Authority: WO
Inventors: 林雪; 石聪; 李海涛
Original assignee: Oppo广东移动通信有限公司
Priority date: 2020-07-13
Filing date: 2020-07-13
Publication date: 2022-01-20
Also published as: CN115669038A

Abstract

The present application relates to the technical field of communications, and provides a beam management method, apparatus and device, and a storage medium. The method comprises: according to a measurement configuration, a terminal measures, in an inactive state, a synchronization signal block (SSB); determines first beam information according to the measurement result, the first beam information being information for instructing a network device to adjust a downlink transmission beam and an uplink reception beam; and uses an uplink resource for inactive data transmission IDT to report the first beam information to the network device. The terminal, by means of the reported first beam information, informs the network device whether the beam direction of the terminal has changed during data transmission, and the network device, according to the first beam information, adjusts the downlink transmission beam and uplink reception beam when communicating with the terminal. That is, in the present application, a network device can be notified to adjust a beam when a transmission beam of a terminal changes, so as to ensure the quality of communication between the network device and the terminal.

Description

Beam management method, apparatus, device and storage medium

technical field

The embodiments of the present application relate to the field of communications technologies, and in particular, to a beam management method, apparatus, device, and storage medium.

Background technique

For most communication systems, the terminal can be in different states according to different business activities to reduce the power consumption of the terminal. Three RRC (Radio Resource Control, radio resource control) states are defined in the NR (New radio, new air interface) system: RRC_IDLE (RRC idle state), RRC_CONNECTED (RRC connected state) and RRC_INACTIVE (RRC inactive state).

In addition, in the NR system, especially when the communication frequency band is in the frequency band range 2, due to the fast attenuation of the high-frequency channel, in order to ensure the coverage, beam-based transmission and reception need to be used between the network device and the terminal. In the RRC connection state, the network device sends the measurement configuration information of the beam to the terminal, the terminal measures the channel state according to the measurement configuration information, and reports the CSI (Channel-Sate Information, channel state information) to the network device. This determines whether the beam direction needs to be adjusted so that the network device can better receive the uplink data.

When the terminal is in the RRC inactive state, CSI reporting is not performed, and the network device does not know whether the beam direction of the current terminal during data transmission has changed, or whether the downlink beam direction is still a good beam direction for the current terminal. Therefore, for the IDT (RRC_INACTIVE Data Transmission) process, it is urgent to design a beam management method to ensure the communication quality between the terminal and the network device.

SUMMARY OF THE INVENTION

Embodiments of the present application provide a beam management method, apparatus, device, and storage medium, so that a terminal can report beam adjustment information to a network device in an inactive state, so that the network device can adjust the downlink transmit beam and the uplink receive beam in time. The technical solution is as follows:

In one aspect, a beam management method is provided, applied in a terminal, and the method includes:

According to the measurement configuration, the synchronization signal block SSB is measured in the inactive state;

determining first beam information according to the measurement result, where the first beam information is information used to instruct the network device to adjust the downlink transmit beam and the uplink receive beam;

The first beam information is reported to the network device by using the uplink resources used for the inactive data transmission IDT.

In another aspect, a beam management method is provided, which is applied to a network device, and the method includes:

Receive the first beam information reported by the terminal, where the first beam information is reported through the uplink resources used for inactive data transmission IDT, and the first beam information is the synchronization signal block SSB that the terminal performs according to the measurement configuration determined by measurements.

In another aspect, a beam management apparatus is provided, the apparatus comprising:

a measurement module, configured to measure the synchronization signal block SSB in an inactive state according to the measurement configuration;

a determination module, configured to determine first beam information according to the measurement result, where the first beam information is information used to instruct the network device to adjust the downlink transmission beam and the uplink reception beam;

The sending module is used for the terminal to report the first beam information to the network device by using the uplink resources used for the inactive data transmission IDT.

a receiving module, configured to receive the first beam information reported by the terminal, where the first beam information is reported through the uplink resources used for inactive data transmission IDT, and the first beam information is the terminal according to the measurement configuration, Determined by measuring the synchronization signal block SSB.

In another aspect, a terminal is provided, the terminal includes a processor and a memory, the memory stores at least one instruction, and the at least one instruction is configured to be executed by the processor to implement any of the above aspects executed by the terminal. a described method.

In another aspect, a network device is provided, the network device comprising a processor and a memory, the memory storing at least one instruction for execution by the processor to implement the above aspect by the network device Perform any of the described methods.

In another aspect, a computer-readable storage medium is provided, and instructions are stored on the computer-readable storage medium, and when the instructions are executed by a processor, the above-mentioned method for executing by a terminal is implemented.

In another aspect, a computer-readable storage medium is provided, and instructions are stored on the computer-readable storage medium, and when the instructions are executed by a processor, the above-mentioned method implemented by a network device is implemented.

In another aspect, there is provided a computer program product comprising instructions which, when run on a computer, cause the computer to perform the method performed by the terminal as described in the above aspects.

In another aspect, there is provided a computer program product comprising instructions which, when run on a computer, cause the computer to perform the method performed by a network device as described in the above aspects.

The beneficial effects brought by the technical solutions provided in the embodiments of the present application include at least:

The terminal measures the synchronization signal block SSB in the inactive state according to the measurement configuration; determines the first beam information according to the measurement result, where the first beam information is used to instruct the network device to adjust the downlink transmission beam and the uplink reception beam; The first beam information is reported to the network device in the uplink resource of the inactive data transmission IDT. The terminal informs the network device whether the beam direction of the terminal changes during data transmission through the reported first beam information, and the network device adjusts the downlink transmit beam and uplink receive beam when communicating with the terminal according to the first beam information. That is, the present application can notify the network device to adjust the beam in time when the transmission beam of the terminal changes, which ensures the communication quality between the network device and the terminal in the inactive state.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present application more clearly, the following briefly introduces the drawings that are used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.

FIG. 1 is a block diagram of a 5G communication system provided by an exemplary embodiment of the present application;

FIG. 2 is a flowchart of a beam management method provided by an exemplary embodiment of the present application;

3 is a flowchart of a beam management method based on a four-step random access procedure provided by an exemplary embodiment of the present application;

4 is a flowchart of a beam management method based on a two-step random access process provided by an exemplary embodiment of the present application;

FIG. 5 is a flowchart of a method for beam management based on CG resources provided by an exemplary embodiment of the present application;

FIG. 6 is a schematic structural diagram of a beam management apparatus provided by an exemplary embodiment of the present application;

FIG. 7 is a schematic structural diagram of a beam management apparatus provided by another exemplary embodiment of the present application;

FIG. 8 is a schematic structural diagram of a communication device provided by an exemplary embodiment of the present application.

detailed description

In order to make the objectives, technical solutions and advantages of the present application clearer, the embodiments of the present application will be further described in detail below with reference to the accompanying drawings.

Before the data closing method provided by the embodiment of the present application is introduced in detail, the related terms and implementation environment involved in the embodiment of the present application are briefly introduced.

First, the related terms involved in this application are explained.

1. Four-step random access process:

Step 1: The terminal sends Msg1 to the network device, the Msg1 is a random access preamble sequence (ie preamble), also called PRACH (Physical Random-Access Channel, physical random access channel).

The terminal sends Msg1 to the network device to notify the network device that there is a random access request, and at the same time enables the network device to estimate the transmission delay between itself and the terminal, and calibrate the uplink time accordingly.

As an example, the information of the resource for sending Msg1 may be obtained through the resource configuration of RACH (Random Access Channel, random access channel). In the Rel-15NR technology, RACH resource configuration information configured for terminal access is defined, including 256 types, and a cell can indicate the RACH resource configuration information used by itself to the terminal in a system message. Each RACH resource configuration information includes preamble format, period, radio frame offset, subframe number in radio frame, start symbol in subframe, number of PRACH time slots in subframe, PRACH timing in PRACH time slot The number of , and the duration of the PRACH opportunity. The time, frequency, and code information of the PRACH resource can be determined through these information. In this way, the terminal can send Msg1 on the corresponding PRACH resource according to the RACH resource configuration information indicated by the network device.

Step 2: After detecting the Msg1 sent by the terminal, the network device sends an RAR (Msg2) to the terminal to inform the terminal of uplink resource information that can be used when sending the next message (Msg3).

Wherein, one RAR may include response messages to multiple terminals sending preambles, and the response message to each terminal includes the random access preamble identification field RAP ID used by each terminal, the resource allocation information of Msg3, TA (Tracking Area, tracking area) information, etc.

Of course, in addition to this, the network device can also perform other operations, such as assigning a temporary RNTI (Radio Network Temporary Identity, wireless network temporary identity) to the terminal, etc., which will not be introduced here.

Step 3: The terminal receives the RAR, and sends Msg3 to the network device on the uplink resource indicated by the RAR.

In some embodiments, the terminal may monitor a PDCCH (Physical Downlink Control Channel, physical downlink control channel) in a search space within a RAR time window corresponding to the RAR to receive the RAR. The RAR time window may be configured through high-layer parameters, and the configuration information of the search space of the PDCCH may be indicated through a system message.

If the terminal does not receive the RAR sent by the network device within the RAR time window, it is considered that the random access procedure has failed. If the terminal receives a RAR, and the preamble index in the RAR is the same as the preamble index sent by the terminal, it is considered that the RAR has been successfully received. At this time, the terminal can stop monitoring the RAR, and the terminal sends Msg3 to the network device.

As an example, the Msg3 may carry a terminal-specific temporary identity information or a terminal identity from the core network. For example, the terminal identity may be S-TMSI (Serving-Temporary Mobile Subscriber Identity, temporary mobile subscriber identity) or a random number.

Step 4: After receiving the Msg3, the network device sends the Msg4 to the terminal.

As an example, the Msg4 includes a contention resolution message and also includes information about uplink transmission resources allocated for the terminal. Exemplarily, in the conflict resolution mechanism, the network device will carry a unique flag in the Msg4 to indicate the terminal that wins the competition. . When the terminal receives the Msg4 sent by the base station, it will detect whether the temporary identification information sent by the terminal in Msg3 is included in the contention resolution message sent by the network device. The random access procedure is initiated again from the first step.

2. Two-step random access process

In 5G NR Release16, in order to reduce the system delay, two-step random access is proposed, and two-step random access consists of two-step messages.

Step 1: The terminal sends the MsgA to the network device. The MsgA consists of a preamble and a PUSCH (Physical Uplink Shared Channel, physical uplink shared channel), which are sent by TDM (Time Division Multiplexing, time division multiplexing).

The PUSCH in the MsgA is similar to the Msg3 in the four-step random access, which carries specific terminal identity information to facilitate the network device to identify the terminal identity.

Step 2: The network device feeds back MsgB to the terminal.

The MsgB is similar to the RAR message and the Msg4 message in the four-step random access, and includes at least TA (Tracking Area, tracking area) information and a contention resolution message.

3. Resource scheduling and configuration authorization:

In the 5G NR standard, for uplink resource scheduling, two resource scheduling methods are supported, one is dynamic resource scheduling, and the other is semi-static resource scheduling.

Dynamic resource scheduling means that the network device sends an uplink scheduling grant (UL grant) to the terminal device, and the UL grant includes the time-frequency domain resources occupied by the scheduled uplink data channel. The terminal device will send uplink data on the indicated time-frequency resources according to the instruction of the UL grant.

Semi-static resource scheduling means that the network device sends semi-static configuration signaling to the terminal device, and the semi-static configuration signaling includes the time-frequency domain resources occupied by the scheduled uplink data channel. Semi-static resource scheduling is divided into two types in the NR standard. Type 1 is that the network device semi-statically configures a periodic uplink data channel for the terminal device at the radio resource control layer to transmit data. Type 2 is that the network device semi-statically configures periodic uplink data channels for terminal devices at the radio resource control layer to transmit data, but needs to activate downlink control information from the physical layer. Wherein, the semi-static configuration signaling is also used to indicate that the uplink data adopts the repeated transmission mode. In one cycle, the terminal device can repeatedly send the same data transmission block on the configured uplink data channel.

In order to better serve periodic services, the NR system introduces the concept of preconfigured resources. The network device can pre-configure the resources required for the terminal device to transmit data in the uplink through RRC (Radio Resource Control, Radio Resource Control) signaling, using semi-static resource allocation, that is, pre-configured transmission resources, such as CG (Configured Grant, configuration authorization) resource. The configured transmission resources can appear periodically, and it is not necessary for the terminal device to obtain an uplink authorization before sending an uplink transmission every time.

4. Beam management

Beam management is for data communication in high-frequency scenarios. Beam management establishes and maintains a suitable beam pair, selects a suitable receive beam at the receiver, and selects a suitable transmit beam at the transmitter. A good wireless connection. The above-mentioned transmitters and receivers may be network devices or terminals.

In many cases, an optimal beam pair for downlink transmission is often the optimal beam pair for uplink transmission, and vice versa. In the 3GPP (3rd Generation Partnership Project, 3rd Generation Partnership Project) protocol, this uplink and downlink consistency is called beam consistency. Beam coherence means that once a suitable beam pair has been selected in one transmission direction, that beam pair can be used directly in the opposite direction.

Beam management can generally be divided into the following parts:

(1) Initial beam establishment

The initial beam establishment refers to the function and process of initially establishing a beam pair for the uplink and downlink directions. When the connection is established, during the initial cell search process, the terminal obtains the SSB (Synchronization Signal Block, synchronization signal block) sent by the network device. Generally, a network device will send multiple SSBs, these SSBs are sent in sequence, and each SSB is borne on a different downlink sending beam. On the one hand, the SSB is associated with the downlink transmit beam, and on the other hand, the SSB is also associated with the uplink random access opportunity (RACH Occasion, RO), preamble and other resources, so that the network device can know the selected by the terminal through random access. Downlink beams, thereby establishing the initial beam pair.

(2) Beam adjustment

After the initial beam pair is established, it is necessary to periodically re-evaluate whether the selection of the receiving end beam and the transmitting end beam is still appropriate due to the movement and rotation of the terminal.

As an example, the terminal may measure a set of reference signals, these reference signals may correspond to a set of downlink beams, and the terminal may determine an optimal pair of downlink beams through the measurement. The terminal reports the optimal downlink transmission beam information determined by the measurement to the network device, and the network device will decide whether to adjust the downlink transmission beam used subsequently according to the measurement result.

(3) Beam recovery

Beam recovery refers to the process of recovering the beam pair in time when the transmission of the current beam pair is blocked. The beam recovery process includes three steps: beam failure detection, identification of new alternative beams, terminal recovery request and network response.

For beam management, the present application focuses on initial beam establishment and beam adjustment, which will be further explained in subsequent embodiments.

Next, the implementation environment involved in the embodiments of the present application is briefly introduced.

FIG. 1 shows a block diagram of a 5G communication system provided by an exemplary embodiment of the present disclosure. The communication system may include: an access network 12 and a terminal 14 .

The access network 12 includes several network devices 120 . The network device 120 may be a base station, which is a device deployed in an access network to provide a wireless communication function for a terminal. The base station may include various forms of macro base station, micro base station, relay station, access point and so on. In systems using different radio access technologies, the names of devices with base station functions may be different. For example, in LTE systems, they are called eNodeBs or eNBs; in 5G NR systems, they are called gNodeBs or gNBs. As communication technology evolves, the description of "base station" may change. For the convenience of description in the embodiments of the present disclosure, the above-mentioned apparatuses for providing a wireless communication function for the terminal 14 are collectively referred to as network devices.

The terminal 14 may include various handheld devices, vehicle-mounted devices, wearable devices, computing devices or other processing devices connected to wireless modems with wireless communication functions, as well as various forms of user equipment, mobile stations (Mobile Station, MS), Terminal device (terminal device) and so on. For the convenience of description, the devices mentioned above are collectively referred to as terminals. The network device 120 and the terminal 14 communicate with each other through some air interface technology, such as a Uu interface.

The technical solutions of the embodiments of the present disclosure can be applied to various communication systems, such as: Global System of Mobile Communication (GSM) system, Code Division Multiple Access (CDMA) system, wideband Code Division Multiple Access (CDMA) system (Wideband Code Division Multiple Access, WCDMA) system, General Packet Radio Service (General Packet Radio Service, GPRS), Long Term Evolution (Long Term Evolution, LTE) system, LTE Frequency Division Duplex (Frequency Division Duplex, FDD) system, LTE Time Division Duplex (TDD) systems, Advanced Long Term Evolution (LTE-A) systems, New Radio (NR) systems, evolution systems of NR systems, LTE on unlicensed frequency bands (LTE-based access to Unlicensed spectrum, LTE-U) system, NR-U system, Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX) communication system, Wireless Local Area Networks (WLAN), Wireless Fidelity (WiFi), next-generation communication systems or other communication systems, etc.

Generally speaking, traditional communication systems support a limited number of connections and are easy to implement. However, with the development of communication technology, mobile communication systems will not only support traditional communication, but also support, for example, Device to Device (Device to Device, D2D) communication, Machine to Machine (M2M) communication, Machine Type Communication (MTC), Vehicle to Vehicle (V2V) communication and Vehicle to Everything (V2X) system, etc. The embodiments of the present application can also be applied to these communication systems.

After the related terms and implementation environment involved in the embodiments of the present application are introduced, the data closing method provided by the embodiments of the present application will be described in detail next with reference to the accompanying drawings.

Please refer to FIG. 2. FIG. 2 is a flowchart of a beam management method according to an exemplary embodiment of the present application. The method can be applied to the 5G communication system shown in FIG. 1. The beam management method can include the following: At least part of the content:

Step 210: The network device sends an RRC release message to the terminal, where the RRC release message carries measurement configuration information.

The measurement configuration information is used for the terminal to determine the measurement configuration. When the terminal enters the inactive state, the network device will send measurement configuration information to the terminal, so that the terminal can perform operations such as cell reselection and RRC connection recovery according to the acquired measurement configuration information.

Step 220: The terminal acquires measurement configuration information.

Based on the acquired measurement configuration information, the NR terminal can perform different measurements. For most configured measurements, the terminal needs to report the measurement results to the network device. The measurement configuration information includes the measurement object, the measurement reporting quantity and the actual reporting method.

The number of measurement reports in the measurement configuration information may be multiple items or one item. As an example, the measurement and reporting quantity includes: indicating the reported received signal strength, or referred to as RSRP (Reference Signal Received Power, reference signal received power). NR not only uses RSRP measurement reporting in RRM (Radio Resource Management, radio resource management), but also introduces RSRP reporting at layer 1, which is applied to beam management. RSRP reporting at layer 1 may be referred to as L1-RSRP.

The measurement configuration information includes at least one group of measurement objects, that is, physical resources for downlink measurement. A measurement resource configuration is associated with at least one resource set, and the terminal uses the resource set to measure channel characteristics. As an example, the resource set in the inactive state may include a set of configured SSBs, and each SSB corresponds to one beam.

It should be noted that the measurement configuration information is predefined; or, the measurement configuration information is determined according to the radio resource control RRC release message.

The RRC release message is a message sent by the network device to the terminal before the terminal enters the RRC inactive state. The message can be sent through RRC signaling, cell broadcast or other proprietary signaling, which is not limited in this application. .

Step 230: The terminal measures the SSB in the inactive state according to the measurement configuration.

In beam management, the measurement configuration includes: a set of SSBs to be measured and a measurement item. As an example, the measurement item may be RSRP.

That is, the terminal measures the RSRP of each SSB according to the measurement configuration.

Step 240: The terminal determines the first beam information according to the measurement result.

The first beam information is information used to instruct the network device to adjust the downlink transmit beam and the uplink receive beam.

The terminal determines the optimal downlink receiving beam according to the measurement result, and determines the optimal uplink transmission beam of the terminal according to the principle of beam consistency.

At the same time, according to the measurement results, the terminal can also determine which beam of the network device has the best signal quality when the terminal uses the optimal uplink transmission beam to send data packets to the network device, so as to determine the optimal downlink transmission beam of the network device.

That is, the terminal obtains RSRP values corresponding to multiple SSBs through measurement, from which the terminal determines a unique SSB, and considers that the beam corresponding to the SSB is the optimal downlink transmission beam of the network device.

As an example, the terminal determines through measurement that the optimal downlink receiving beam is beam A, and according to the principle of beam consistency, the optimal uplink transmission beam of the terminal is also beam A. Similarly, through measurement, the terminal determines that the optimal downlink transmit beam of the network device is beam 1. According to the principle of beam consistency, the optimal uplink receive beam of the network device is also beam 1.

The determination of the first beam information by the terminal according to the measurement result includes the following two possible implementation manners:

In a possible implementation manner, the terminal determines the SSB with the largest RSRP as the first SSB according to the measurement result. The identifier corresponding to the first SSB is determined as the first beam information.

In another possible implementation manner, the terminal uses an SSB whose RSRP is greater than a threshold value as a candidate SSB according to the measurement result, and obtains at least one SSB. A target SSB is determined from at least one candidate SSB, and an identifier corresponding to the target SSB is determined as the first beam information.

The above-mentioned identification includes the synchronization signal block index SSB index.

It should be noted that the first SSB and the target SSB are used to indicate a certain beam among the communication beams supported between the terminal and the network device. Determining the target SSB from the candidate SSBs may be based on the RSRP value, or may be based on other selection principles, which is not limited in this application, as long as only one SSB is selected.

The above-mentioned threshold value may be a preset value, or may be a value carried by the network device in the measurement configuration information, which is not limited in this application.

It should be noted that when the terminal needs to perform the beamforming measurement of the receiving end (terminal) in the process of downlink reception, the terminal needs to use different receiving beams to measure the SSB sent in the downlink, and the measurement results are used by the terminal itself. The uplink transmission beam used by the network device needs to be reported to the network device. Therefore, the first beam information mentioned in this application is used to indicate the optimal downlink transmission beam and uplink reception beam of the network device.

As an example, the first beam information may be: SSB-2, and the downlink transmit beam corresponding to SSB-2 is beam 2. The first beam information indicates that when the terminal uses beam B to send uplink data packets, the optimal uplink receiving beam of the network device is beam 2 .

Step 250: The terminal uses the uplink resources for IDT to report the first beam information to the network device.

Wherein, the uplink resources used for IDT include any of the following uplink resources:

In the four-step random access process, respond to the uplink resource indicated by the first scheduling grant received by the RAR through random access;

The configuration authorization CG resource configured by the network device for the terminal for inactive data transmission;

The uplink resource for inactive data transmission scheduled by the network device through the PDCCH.

It should be noted that the uplink resources configured above may be included in the acquired measurement configuration information, or may be notified to the terminal through a separate message before the terminal performs beam measurement of the terminal, which is not limited in this application.

It should be noted that, when reporting the first beam information, the terminal may report the first beam information through a MAC CE (MAC Control Element, medium access control control information element).

With the development of 5G technology, the method for the terminal to report the first beam information is not limited to the above-mentioned MAC CE. It is only emphasized here that the terminal needs to report the first beam information to the network device.

Step 260: The network device receives the first beam information reported by the terminal.

The first beam information is reported through uplink resources used for inactive data transmission IDT, and the first beam information is determined by the terminal measuring the synchronization signal block SSB according to the measurement configuration.

Optionally, the uplink resources used for IDT include any of the following uplink resources:

In the four-step random access process, the uplink resource indicated by the first scheduling grant sent by the RAR is responded to by random access;

The uplink resource for inactive data transmission scheduled by the network device through the physical downlink control channel PDCCH.

Optionally, receive the first beam information reported by the terminal, including:

The first beam information is received through the MAC CE.

Step 270: The network device adjusts the downlink transmit beam and the uplink receive beam according to the first beam information.

The network device determines the downlink transmit beam corresponding to the SSB index according to the SSB index in the first beam information. At the same time, according to the principle of beam consistency, the network device can determine the optimal uplink receive beam, and use the beam to receive subsequent data packets sent by the terminal. . When the network device needs to send a message to the terminal, the downlink transmission beam corresponding to the SSB index is also used.

Usually, the SSB index indicates the same beam supported by the network device, only the uplink and downlink directions are different when receiving and sending data.

As an example, if the first beam information is: SSB-2, the downlink transmit beam corresponding to SSB-2 is beam 2. The first beam information indicates that when the terminal uses beam B to send an uplink data packet, the optimal uplink receiving beam of the network device is also beam 2 .

At this time, in order to better receive the data packets sent by the terminal, the network device can adjust the beam receiving the data packets to beam 2, and use beam 2 to transmit subsequent data packets with the terminal until it receives a new data packet sent by the terminal. beam information.

In the embodiment of the present application, the network device sends configuration measurement information to the terminal when the terminal enters the RRC inactive state, and the terminal obtains the configuration measurement information, and measures the RSRP of a group of SSBs in the inactive state according to the measurement configuration. According to the measurement result, the first beam information is determined, and the first beam information is reported to the network device by using the uplink resources used for IDT transmission, so that the network device can adjust the uplink receiving beam and the downlink transmitting beam in time according to the first beam information to ensure that It improves the communication quality between the network device and the terminal.

In the embodiment based on FIG. 2 , the following three scenarios are included.

Scenario 1: Beam management is implemented based on a four-step random access procedure.

Scenario 2: Beam management is implemented based on a two-step random access procedure.

Scenario 3: Implement beam management based on CG resources.

It should be noted that, in the above three scenarios, the beam management method shown in FIG. 2 can be used to implement beam measurement, reporting of first beam information, and beam adjustment processes in an inactive state.

Next, the process of implementing beam management in three example scenarios will be explained.

For scenario 1, refer to FIG. 3 in combination. FIG. 3 shows a flowchart of a beam management method based on a four-step random access procedure provided by an exemplary embodiment of the present application.

Step 310: The terminal determines the uplink transmit beam and the downlink receive beam through measurement, and informs the network device of the first beam information through Msg1 (preamble).

As an example, as shown in FIG. 3 , the terminal determines that the uplink transmission beam is beam A after configuration and measurement. At this time, the network device does not know the direction of the uplink transmission beam of the terminal, so the network device maintains omnidirectional reception before receiving the random access Msg1 to avoid missing data or request messages sent by the terminal.

In addition, when the terminal uses beam A to send uplink data, the optimal receiving beam of the network device is beam 2, so the SSB index corresponding to beam 2 is used as the first beam information.

The first beam information is sent to the network device through the RO resource associated with the SSB.

Step 320: The network device successfully receives the Msg1, determines that the downlink transmit beam and the uplink receive beam are beam 2, and adjusts its subsequent uplink receive beam and downlink transmit beam to beam 2.

As shown in FIG. 3 , after correctly receiving the preamble, the network device sends a random access response to the terminal through beam 2 .

The random access response may include: a scheduling grant, which is used to indicate the time-frequency domain resources that the terminal can use when transmitting the subsequent Msg3. In this application, the uplink resources granted by the scheduling can be used to transmit the second beam information.

It should be noted that the second beam information here is only to distinguish it from the first beam information. Both the second beam information and the first beam information are information used to instruct the network device to perform beam adjustment, and only the first beam information Different from the SSB index carried in the second beam information.

Step 330: When the terminal detects the change of the beam, it is determined according to the measurement result that the optimal downlink transmission beam of the network equipment is changed from beam beam 2 to beam 1, and at the same time, it is determined that when the network equipment transmits with beam 1, the optimal receiving beam of the terminal is determined by Beam A becomes beam B.

Therefore, the terminal uses beam A to send Msg3 to the network device, where the Msg3 includes the second beam information. The second beam information is the SSB index of the SSB corresponding to beam 1, and the terminal may carry the second beam information in the MAC CE on the uplink resource.

Step 340: The network device uses the beam 2 before adjustment to receive the above Msg3, and adjusts the downlink transmission beam to beam 1 according to the second beam information.

The network device sends the Msg4 for contention resolution to the terminal through beam 1, and at the same time, the terminal uses the adjusted beam B to receive the Msg4.

Step 350: The network device sends the first scheduling grant to the terminal through beam 1, and the terminal uses the time-frequency domain resources indicated by the first scheduling grant to transmit data packets.

Step 360: Before the terminal uses the resource of the first scheduling grant to send the data packet, the terminal detects the beam change. Then, the third beam information is sent to the network device.

As an example, if the terminal detects that the optimal downlink transmit beam is changed from beam 1 to beam 2, and the optimal downlink receive beam is changed from beam B to beam A, the SSB index of the SSB corresponding to beam 2 is used as the third beam information. The terminal may carry the third beam information in the MAC CE on the uplink resource.

Step 370: The network device receives the third beam information through beam 1, and adjusts the subsequent downlink transmit beam and uplink receive beam to beam 2.

At this time, the terminal also adjusts the downlink receiving beam to beam A.

It should be noted that, if there is no change, the network device will always use beam 2 to receive uplink data, and use beam 2 to send downlink data until the network device sends an RRC release message.

In the embodiment of the present application, in the four-step random access process, the terminal performs SSB measurement before conflict resolution to determine whether a beam change has occurred. When the change of the downlink transmission beam is detected, the SSB index of the SSB corresponding to the optimal downlink transmission beam is reported to the network device as the first beam information. In this way, beam management can be implemented in the inactive state, which ensures the network device and the terminal. quality of communication between them.

For scenario 2, refer to FIG. 4 in combination. FIG. 4 shows a flowchart of a beam management method based on a two-step random access process provided by an exemplary embodiment of the present application

Step 410: The terminal determines the uplink receive beam and the downlink transmit beam through measurement, and informs the network device of the first beam information through MsgA (preamble).

Similar to step 310, the terminal determines through measurement that the optimal uplink transmission beam of the terminal is beam A, and the optimal downlink transmission beam of the network device is beam 2. The network device receives uplink data and messages omnidirectionally, and after receiving the first beam information, determines the downlink transmit beam as beam 2, and determines the optimal uplink receive beam of the network device as beam 2 according to the principle of beam consistency.

After sending MsgA, the terminal sends the information payload MsgA Payload of message A to the network device. At this time, the network device uses beam 2 to receive the MsgA Payload from the terminal.

It should be noted that after sending the MsgA Payload, the terminal measures the SSB according to the measurement configuration to determine whether the beam changes.

As an example, the terminal determines that the optimal downlink receiving beam is changed from beam A to beam B, and similarly, the optimal downlink transmission beam of the network device is changed from beam 2 to beam 1.

Step 420: The network device sends a contention conflict resolution message to the terminal through beam 2.

Step 430: The network device sends the uplink scheduling grant to the terminal through beam 2, and the terminal uses the time-frequency domain resources indicated by the uplink scheduling grant to transmit data packets.

Step 440: The terminal detects the beam change before using the uplink resource to send the data packet, and sends the second beam information to the network device through the MAC CE.

The second beam information is the SSB index of the SSB corresponding to beam 1.

Step 450: The network device successfully receives the second beam information through the original beam 2, and adjusts the downlink transmission beam to beam 1 for subsequent data transmission.

At this time, the terminal adjusts the downlink receiving beam to beam B.

It should be noted that, if there is no change, the network device will always use beam 1 to receive uplink data, and use beam 1 to send downlink data until the network device sends an RRC release message.

In this embodiment of the present application, in the two-step random access process, the terminal performs SSB measurement before receiving the MsgB, to determine whether the beam changes. After receiving the scheduling authorization from the network device, the first beam information is reported to the network device through uplink resources. The first beam information is the SSB index of the SSB corresponding to the optimal downlink transmit beam of the network device. The network device can adjust its own uplink receive beam and downlink transmit beam according to the first beam information, ensuring that the terminal and the network device are in an inactive state. quality of communication.

For scenario 3, refer to FIG. 5 in combination. FIG. 5 shows a flowchart of a method for beam management based on CG resources provided by an exemplary embodiment of the present application.

Step 510: The terminal determines the uplink transmit beam and the downlink receive beam, such as beam A, through measurement. At the same time, the terminal determines the optimal downlink transmit beam and uplink receive beam of the network device through measurement, such as beam 2, and uses the SSB index of the SSB corresponding to beam 2 as the first beam information.

Since the network device is pre-configured with periodic transmission resources, there is no need to wait for the scheduling authorization of the network device during use. As an example, when using the CG resource for IDT transmission, the MAC CE carries the above-mentioned first beam information to inform the network device of the optimal downlink transmission beam.

The network device omnidirectionally receives the uplink data sent by the terminal, and if successfully received, determines the downlink transmission beam and the uplink reception beam for subsequent data transmission through the first beam information reported by the terminal.

As an example, if the first beam information is the SSB index of the SSB corresponding to beam 2, the network device adjusts its own downlink transmit beam and uplink receive beam to beam 2 after receiving the information.

It should be noted that, after sending the first beam information, the terminal continues to measure the SSB according to the measurement configuration to determine whether the beam changes.

Step 520: The network device sends the uplink scheduling grant to the terminal through beam 2, and the terminal uses the time-frequency domain resources indicated by the uplink scheduling grant to transmit data packets.

Step 530: Before the terminal sends the data packet on the uplink resource, if the change of the beam is detected, the changed second beam information is sent to the network device through the MAC CE.

As an example, before the terminal uses uplink resources to send data packets, it is determined that the optimal downlink receiving beam of the terminal is changed from beam A to beam B. Similarly, the optimal downlink transmission beam of the network device is changed from beam 2 to beam 1.

Step 540: The network device successfully receives the second beam information through the original beam 2, and adjusts the downlink transmission beam to the beam 1 for subsequent data transmission.

At this time, the terminal adjusts the downlink receiving beam to beam B.

In the embodiment of the present application, the terminal sends the first beam information based on the preconfigured CG resources, and the network device adjusts the uplink receiving beam and the downlink sending beam according to the first beam information. The whole process does not need to wait for the configuration authorization of the network device, which is simple and fast. At the same time, since the first beam information indicates the optimal downlink transmit beam and uplink receive beam of the network device, the communication quality between the terminal and the network device in the inactive state is guaranteed.

It should be noted that, the foregoing method embodiments may be implemented separately, or may be implemented in combination, which is not limited in the present disclosure. The above-described embodiments are for illustrative purposes only, and are not intended to be limiting. It should be appreciated that other trigger timings may also be used for execution, and other implementation manners may also be used, including but not limited to any combination of the above several optional manners.

FIG. 6 is a schematic structural diagram of a beam management apparatus according to an exemplary embodiment. The apparatus 600 may become a terminal, or be implemented as a part of the terminal. The apparatus 600 includes: a measurement module 610 , a determination module 620 and a transmission module 630 .

a measurement module 610, configured to measure the synchronization signal block SSB in an inactive state according to the measurement configuration;

a determining module 620, configured to determine first beam information according to the measurement result, where the first beam information is information used to instruct the network device to adjust the downlink transmit beam and the uplink receive beam;

The sending module 630 is used for the terminal to report the first beam information to the network device by using the uplink resource used for the inactive data transmission IDT.

Optionally, the uplink resources used for IDT include any one of the following uplink resources:

Optionally, the determining module 620 includes:

a first determination submodule, configured to determine the SSB with the largest reference signal received power RSRP as the first SSB according to the measurement result;

The second determination submodule is configured to determine the identifier corresponding to the first SSB as the first beam information.

Optionally, the determining module 620 includes:

The third determination sub-module is configured to use the SSB whose RSRP is greater than the threshold value as the candidate SSB according to the measurement result, and obtain at least one candidate SSB;

a fourth determination submodule, configured to determine a target SSB from at least one candidate SSB;

The fifth determination sub-module is configured to determine the identifier corresponding to the target SSB as the first beam information.

Optionally, the identification includes: a synchronization signal block index SSB index.

Optionally, the apparatus 600 further includes:

The obtaining module 640 is configured to obtain measurement configuration information.

Optionally, the measurement configuration information is predefined;

Alternatively, the measurement configuration information is determined according to the radio resource control RRC release message.

Optionally, reporting the first beam information to the network device, including:

The first beam information is reported through the medium access control control information element MAC CE.

In the embodiment of the present application, the terminal measures the synchronization signal block SSB in the inactive state according to the measurement configuration, determines the first beam information according to the measurement result, uses the uplink resources for data transmission IDT in the inactive state, and sends the data to the network device. Report the first beam information. The first beam information is the information used to instruct the network device to adjust the downlink transmit beam and the uplink receive beam. Therefore, the terminal not only determines its own optimal downlink receive beam through measurement, but also determines the network device's optimal downlink transmit beam, and uses the first beam. The beam information is reported to the network device, which realizes beam management in the inactive state and ensures the communication quality between the terminal and the network device.

FIG. 7 is a schematic structural diagram of an apparatus for beam management according to another exemplary embodiment. The apparatus may be implemented as a network device, or may be implemented as a part of a network device. The apparatus 700 includes a receiving module 710, a sending module 720, and an adjustment module. Module 730.

The receiving module 710 is configured to receive the first beam information reported by the terminal, the first beam information is reported through the uplink resources used for the inactive data transmission IDT, and the first beam information is the synchronization signal block SSB according to the measurement configuration of the terminal. determined by measurements.

Optionally, the apparatus 700 further includes:

The sending module 720 is configured to send a radio resource control RRC release message, where the RRC release message carries measurement configuration information, and the measurement configuration information is used for the terminal to determine the measurement configuration.

The first beam information is received through the medium access control control information element MAC CE.

Optionally, the apparatus 700 further includes:

The adjustment module is configured to adjust the downlink transmit beam and the uplink receive beam according to the first beam information.

In the embodiment of the present application, the network device receives the first beam information reported by the terminal, the first beam information is reported through the uplink resources used for the inactive data transmission IDT, and the first beam information is the terminal according to the measurement configuration. Signal block SSB as determined by measurements. Therefore, the network device can adjust its own uplink receiving beam and downlink transmitting beam according to the first beam information to adapt to the beam adjustment of the terminal, and ensure the communication quality between the terminal and the network device in the inactive state.

Please refer to FIG. 8, which shows a schematic structural diagram of a communication device (terminal or network device) provided by an exemplary embodiment of the present application. The communication device includes: a processor 801, a receiver 802, a transmitter 803, a memory 804, and a bus 805.

The processor 801 includes one or more processing cores, and the processor 801 executes various functional applications and information processing by running software programs and modules.

The receiver 802 and the transmitter 803 may be implemented as a communication component, which may be a communication chip.

The memory 804 is connected to the processor 801 through the bus 805 .

The memory 804 may be configured to store at least one instruction, and the processor 801 is configured to execute the at least one instruction, so as to implement various steps performed by the first IAB network device in each of the foregoing method embodiments.

In addition, the memory 804 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, volatile or non-volatile storage device including but not limited to: magnetic disk or optical disk, EEPROM (Electrically Erasable Programmable read only memory, Electrically Erasable Programmable Read-Only Memory), EPROM (Erasable Programmable Read-Only Memory, Erasable Programmable Read-Only Memory), SRAM (Static Random Access Memory, Static Access Memory), ROM (Read Only Memory, read-only memory), magnetic memory, flash memory, PROM (Programmable Read-Only Memory, programmable read-only memory).

The present application provides a computer-readable storage medium, where at least one instruction is stored in the storage medium, and the at least one instruction is loaded and executed by the processor to implement the beam management method provided by each of the foregoing method embodiments.

The present application also provides a computer program product, which when the computer program product runs on the computer, causes the computer to execute the beam management methods provided by the above method embodiments.

Those skilled in the art should realize that, in one or more of the above examples, the functions described in the embodiments of the present application may be implemented by hardware, software, firmware, or any combination thereof. When implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage medium can be any available medium that can be accessed by a general purpose or special purpose computer.

The above descriptions are only optional embodiments of the present application, and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the protection of the present application. within the range.

Claims

A beam management method, characterized in that it is applied to a terminal, the method comprising:

According to the measurement configuration, the synchronization signal block SSB is measured in the inactive state;

determining first beam information according to the measurement result, where the first beam information is information used to instruct the network device to adjust the downlink transmit beam and the uplink receive beam;

The first beam information is reported to the network device by using the uplink resources used for the inactive data transmission IDT.
The method according to claim 1, wherein the uplink resource for IDT comprises any one of the following uplink resources:

In the four-step random access process, respond to the uplink resource indicated by the first scheduling grant received by the RAR through random access;

The network device authorizes the CG resource for the configuration of the terminal configured for inactive data transmission;

The network device schedules the uplink resources for inactive data transmission through the physical downlink control channel PDCCH.
The method according to claim 1, wherein the determining the first beam information according to the measurement result comprises:

According to the measurement result, the SSB with the largest reference signal received power RSRP is determined as the first SSB;

The identifier corresponding to the first SSB is determined as the first beam information.
The method according to claim 1, wherein the determining the first beam information according to the measurement result comprises:

According to the measurement result, the SSB whose RSRP is greater than the threshold value is used as the candidate SSB to obtain at least one candidate SSB;

From the at least one candidate SSB, determine a target SSB;

The identifier corresponding to the target SSB is determined as the first beam information.
The method according to claim 3 or 4, characterized in that,

The identification includes: the synchronization signal block index SSB index.
The method according to claim 1, wherein before the SSB is measured according to the measurement information configured by the network device, the method further comprises:

Get measurement configuration information.
The method of claim 6, wherein:

the measurement configuration information is predefined;

Alternatively, the measurement configuration information is determined according to the radio resource control RRC release message.
The method according to any one of claims 1 to 7, wherein the reporting the first beam information to a network device comprises:

The first beam information is reported through the medium access control control information element MAC CE.
A beam management method, characterized in that, applied to a network device, the method comprising:

Receive the first beam information reported by the terminal, where the first beam information is reported through the uplink resource used for inactive data transmission IDT, and the first beam information is the synchronization signal block SSB that the terminal performs according to the measurement configuration. determined by measurements.
The method according to claim 9, wherein the uplink resources used for IDT comprise any one of the following uplink resources:

In the four-step random access process, the uplink resource indicated by the first scheduling grant sent by the RAR is responded to by random access;

The network device authorizes the CG resource for the configuration of the terminal configured for inactive data transmission;

The network device schedules the uplink resources for inactive data transmission through the physical downlink control channel PDCCH.
The method according to claim 9, wherein the method further comprises:

A radio resource control RRC release message is sent, where the RRC release message carries measurement configuration information, and the measurement configuration information is used for the terminal to determine the measurement configuration.
The method according to any one of claims 9 to 11, wherein receiving the first beam information reported by the terminal comprises:

The first beam information is received through a medium access control control information element MAC CE.
The method according to any one of claims 9 to 11, wherein the method further comprises:

Adjust the downlink transmit beam and the uplink receive beam according to the first beam information.
A beam management device, characterized in that it is configured in a terminal, and the device includes:

a measurement module, configured to measure the synchronization signal block SSB in an inactive state according to the measurement configuration;

a determining module, configured to determine first beam information according to the measurement result, where the first beam information is information used to instruct the network device to adjust the downlink transmission beam and the uplink reception beam;

The sending module is used for the terminal to report the first beam information to the network device by using the uplink resources used for the inactive data transmission IDT.
The apparatus according to claim 14, wherein the uplink resource for IDT includes any one of the following uplink resources:

In the four-step random access process, respond to the uplink resource indicated by the first scheduling grant received by the RAR through random access;

The network device authorizes the CG resource for the configuration of the terminal configured for inactive data transmission;

The network device schedules the uplink resources for inactive data transmission through the physical downlink control channel PDCCH.
The device according to claim 14, wherein the determining module comprises:

a first determination submodule, configured to determine the SSB with the largest reference signal received power RSRP as the first SSB according to the measurement result;

The second determination submodule is configured to determine the identifier corresponding to the first SSB as the first beam information.
The device according to claim 14, wherein the determining module comprises:

A third determination submodule, configured to use an SSB whose RSRP is greater than the threshold value as a candidate SSB according to the measurement result, to obtain at least one candidate SSB;

a fourth determination submodule, configured to determine a target SSB from the at least one candidate SSB;

The fifth determination submodule is configured to determine the identifier corresponding to the target SSB as the first beam information.
The device according to claim 16 or 17, characterized in that,

The identification includes: the synchronization signal block index SSB index.
The apparatus of claim 14, wherein the apparatus further comprises:

The acquisition module is used to acquire measurement configuration information.
The apparatus of claim 19, wherein:

the measurement configuration information is predefined;

Alternatively, the measurement configuration information is determined according to the radio resource control RRC release message.
The apparatus according to any one of claims 14 to 20, wherein the reporting the first beam information to a network device comprises:

The first beam information is reported through the medium access control control information element MAC CE.
A beam management apparatus, characterized in that it is applied to network equipment, the apparatus comprising:

a receiving module, configured to receive the first beam information reported by the terminal, where the first beam information is reported through the uplink resources used for inactive data transmission IDT, and the first beam information is the terminal according to the measurement configuration, Determined by measuring the synchronization signal block SSB.
The apparatus according to claim 22, wherein the uplink resources used for IDT comprise any one of the following uplink resources:

In the four-step random access process, the uplink resource indicated by the first scheduling grant sent by the RAR is responded to by random access;

The network device authorizes the CG resource for the configuration of the terminal configured for inactive data transmission;

The network device schedules the uplink resources for inactive data transmission through the physical downlink control channel PDCCH.
The apparatus of claim 22, wherein the apparatus further comprises:

A sending module, configured to send a radio resource control RRC release message, where the RRC release message carries measurement configuration information, and the measurement configuration information is used for the terminal to determine the measurement configuration.
The apparatus according to any one of claims 22 to 24, wherein receiving the first beam information reported by the terminal comprises:

The first beam information is received through a medium access control control information element MAC CE.
The device according to any one of claims 22 to 24, wherein the device further comprises:

An adjustment module, configured to adjust the downlink transmit beam and the uplink receive beam according to the first beam information.
A terminal, characterized in that the terminal includes a processor and a memory, the memory stores at least one instruction, and the at least one instruction is used to be executed by the processor to implement the method of any one of claims 1-8 A step of.
A network device, characterized in that the network device includes a processor and a memory, the memory stores at least one instruction, and the at least one instruction is used to be executed by the processor to implement any one of claims 9-13 item method steps.
A computer-readable storage medium storing instructions on the computer-readable storage medium, characterized in that, when the instructions are executed by a processor, the steps of any one of the methods of claims 1-8 are implemented.
A computer-readable storage medium storing instructions on the computer-readable storage medium, characterized in that, when the instructions are executed by a processor, the steps of any one of the methods of claims 9-13 are implemented.