Method for transmitting information and communication device

Abstract

The application provides a method and a communication device for transmitting information. The application relates to the field of communication. A terminal device can indicate a first beam and a first time through first indication information, and measure at least one first reference signal according to second indication information to obtain a second beam, and indicate the second beam through third indication information. The terminal device can receive first configuration information at a second time. The second time at which the terminal device receives the first configuration information is obtained according to the first time. The first time can be a future time, that is, the terminal device can predict the first beam in advance. The second time is not earlier than the first time. The second time can also be a future time. When the future second time arrives, the terminal device can receive the first configuration information for configuring the second beam. The time delay caused by determining the first beam after the failure of the beam can be avoided, and therefore the reliability of transmission can be improved.

Description

Technical Field

[0001] This application relates to the field of communications, and more specifically to methods and apparatus for transmitting information in the field of communications. Background Technology

[0002] In New Radio (NR), network devices and terminal devices need to perform beam pairing to communicate using the paired beams. However, if the paired beams fail or the link quality degrades, re-pairing is required. During re-pairing, the network device periodically sends a reference signal, and the terminal device performs a coarse measurement; then the network device sends another reference signal, and the terminal device performs a fine measurement, thus completing the beam pairing. This re-pairing process is relatively time-consuming. Furthermore, during this process, data transmission between the terminal and network devices may be interrupted or lost, making it difficult to meet high-latency data transmission requirements and resulting in poor transmission reliability. Summary of the Invention

[0003] This application provides a method and communication apparatus for transmitting information, which can improve the reliability of transmission.

[0004] In a first aspect, a method for transmitting information is provided, the method being applicable to a terminal device, comprising:

[0005] Send a first indication message, the first indication message being used to indicate a first beam and a first time;

[0006] Receive second indication information, the second indication information being used to instruct the terminal device to measure at least one first reference signal, the at least one first reference signal having a quasi-co-located (QCL) relationship with the first beam;

[0007] Send a third indication message, the third indication message being used to indicate a second beam, the second beam being obtained by the terminal device from measuring the at least one first reference signal;

[0008] At a second moment, first configuration information is received, which indicates that the transmission beam of the control channel or data channel is the second beam. The second moment is no earlier than the first moment and is obtained based on the first moment.

[0009] In the above scheme, the terminal device can indicate the first beam and the first time through the first indication information, and the terminal device measures at least one first reference signal according to the second indication information to obtain the second beam. The second beam is indicated by the third indication information. The terminal device can receive the first configuration information at the second time. The second time at which the terminal device receives the first configuration information is obtained based on the first time. The first time can be a future time. That is, the terminal device can predict the first beam in advance. The second time is not earlier than the first time. The second time can also be a future time. When the future second time arrives, the terminal device can receive the first configuration information for configuring the second beam. This can avoid the time delay caused by determining the first beam after the beam fails, thereby improving the reliability of transmission.

[0010] Optionally, the first moment can be a future moment.

[0011] Optionally, the first moment can be the moment when the terminal device enters the obstructed environment in the future.

[0012] Optionally, the first moment can be the moment when the terminal device leaves the obstructed environment in the future.

[0013] Optionally, the terminal device can determine the first moment based on its current location, its speed, and the current time. That is, as the terminal device moves, the first moment determined by the terminal device may change; therefore, the terminal device can instruct the transmission of the changed first moment.

[0014] Optionally, the first beam can be an SSB beam.

[0015] Optionally, at least one first reference signal may be a CSI-RS.

[0016] Optionally, the second beam can be a CSI-RS beam.

[0017] Optionally, the direction of the first beam may include the direction of the beam that transmits at least one first reference signal.

[0018] Alternatively, the first indication information may indicate the first beam and indicate the first beam as a future beam.

[0019] In some possible implementations, the second indication information is used to instruct the terminal device to measure at least one first reference signal at a third time.

[0020] The third time is no later than the first time.

[0021] In the above scheme, the terminal device needs to measure at least one first reference signal in the third moment before the first moment. That is, the terminal device needs to measure at least one first reference signal and determine the second beam in advance. In this way, after the first moment, the first network device can directly send the control channel or data channel through the second beam, which can save the time delay of the terminal device in determining the second beam after the first moment.

[0022] In some possible implementations, the second indication information is used to instruct the terminal device to measure at least one first reference signal at a third time.

[0023] The third time point is no earlier than the first time point.

[0024] In the above scheme, the terminal device can measure at least one first reference signal at a third time after the first time. Thus, the terminal device can determine the first beam before the first time and the second beam after the first time. Optionally, the first beam is an SSB beam and the second beam is a CSI-RS beam, so the terminal device can determine the SSB beam before the first time and the corresponding CSI-RS beam after the first time.

[0025] In some possible implementations, the transmission beam of the control channel or the data channel is the first beam, occurring between the first time point and the second time point.

[0026] In the above scheme, the first network device sends the first configuration information at the second time. The first time can be the time when the obstruction occurs or the time when the obstruction disappears. Since the second time is later than the first time, the transmission between the terminal device and the first network device may be interrupted between the first time and the second time. Therefore, between the first time and the second time, the transmission beam of the control channel or data channel is the first beam. That is to say, the first beam can be used as a temporary transmission beam to avoid transmission interruption.

[0027] In some possible implementations, the difference between the second time point and the first time point is less than a preset value.

[0028] In the above scheme, if the time between the second moment and the first moment is too long, it will cause the first network device to send the first configuration information only after a relatively long period of time after the blockage occurs, resulting in a situation where data cannot be transmitted for a long period of time between the second moment and the first moment.

[0029] In some possible implementations, the method further includes:

[0030] Send a fourth indication message, which is used to indicate a fourth time point;

[0031] The terminal device receives a fifth indication message, which is used to instruct the terminal device to measure at least one second reference signal. The at least one second reference signal has a QCL relationship or an indirect QCL relationship with a third beam. The third beam is the transmission beam of the control channel or the data channel before the first indication message is sent.

[0032] Send a sixth indication message, the sixth indication message being used to indicate a fourth beam, the fourth beam being obtained by the terminal device from measuring the at least one second reference signal;

[0033] At the fourth moment, second configuration information is received, which indicates that the transmission beam of the control channel or the data channel is the fourth beam.

[0034] In the above scheme, the terminal device can determine the fourth beam in advance before the fourth moment, which can reduce latency. Before leaving the obstruction, the fourth beam to be used after leaving the obstruction can be measured, avoiding the latency problem caused by the first network device and the terminal device needing a long time to pair beams after the terminal device leaves the obstruction, thereby improving transmission performance.

[0035] Optionally, the third beam can be an SSB beam or a CSI-RS beam.

[0036] Optionally, the fourth beam can be a CSI-RS beam.

[0037] Optionally, the third beam can be an SSB beam, and at least one second reference signal can be at least one CSI-RS, with the third beam and at least one second reference signal having a QCL relationship.

[0038] Optionally, the third beam can be a CSI-RS beam, and at least one second reference signal can be at least one CSI-RS, with the third beam and at least one second reference signal having an indirect QCL relationship.

[0039] In some possible implementations, the method further includes: sending fourth indication information, the fourth indication information being used to indicate a fourth time, after which the transmission beam of the control channel or the data channel is a third beam, the third beam being the transmission beam of the control channel or the data channel prior to sending the first indication information.

[0040] Optionally, the fourth moment is the moment of leaving the obstruction. The terminal device can determine that it can leave the obstruction at the second position based on the departure of other terminal devices from the obstruction. The terminal device can predict the fourth moment when it moves to the second position based on the current moment, the second position, and the speed of the terminal device.

[0041] Secondly, a method for transmitting information is provided, the method being applicable to a first network device, comprising:

[0042] Receive first indication information, the first indication information being used to indicate a first beam and a first time;

[0043] Send a second instruction message, the second instruction message being used to instruct the terminal device to measure at least one first reference signal, the at least one first reference signal having a quasi-co-located (QCL) relationship with the first beam;

[0044] Receive third indication information, the third indication information being used to indicate the second beam, the second beam being obtained by the terminal device measuring the at least one first reference signal;

[0045] At a second time, first configuration information is sent, which indicates that the transmission beam of the control channel or data channel is the second beam. The second time is no earlier than the first time and is obtained based on the first time.

[0046] In the above scheme, the first network device can receive first indication information indicating a first beam and a first time, and send second indication information for measuring at least one first reference signal. The terminal device measures at least one first reference signal according to the second indication information to obtain a second beam. The first network device can receive third indication information indicating the second beam. The first network device can send first configuration information at a second time. The second time at which the first network device sends the first configuration information is obtained based on the first time. The first time can be a future time, that is, the terminal device can predict the first beam in advance. The second time is not earlier than the first time, and the second time can also be a future time. When the future second time arrives, the first network device can send the first configuration information for configuring the second beam, which can avoid the time delay caused by determining the first beam after the beam fails, thereby improving the reliability of transmission.

[0047] In some possible implementations, the second indication information is used to instruct the terminal device to measure at least one first reference signal at a third time.

[0048] The third moment is earlier than the first moment.

[0049] In some possible implementations, the second indication information is used to instruct the terminal device to measure the at least one first reference signal at a third time.

[0050] The third moment is later than the first moment.

[0051] In some possible implementations, the transmission beam of the control channel or the data channel is the first beam, occurring between the first time point and the second time point.

[0052] In some possible implementations, the difference between the second time point and the first time point is less than a preset value.

[0053] In some possible implementations, the method further includes:

[0054] Receive fourth indication information, which is used to indicate a fourth time.

[0055] Send a fifth indication message, the fifth indication message being used to instruct the terminal device to measure at least one second reference signal, the at least one second reference signal having a quasi-co-located QCL relationship or an indirect QCL relationship with a third beam, the third beam being the transmission beam of the control channel or the data channel before receiving the first indication message;

[0056] The terminal device receives a sixth indication message, which is used to indicate a fourth beam, the fourth beam being obtained by measuring the at least one second reference signal.

[0057] At the fourth moment, second configuration information is transmitted, which indicates that the transmission beam of the control channel or the data channel is the fourth beam.

[0058] In some possible implementations, the sending also includes:

[0059] A fourth indication message is sent, which is used to indicate a fourth time. After the fourth time, the transmission beam of the control channel or the data channel is a third beam, which is the transmission beam of the control channel or the data channel before receiving the first indication message.

[0060] It should be noted that the beneficial effects of the second aspect can be found in the description of the first aspect, but will not be described in detail to avoid redundancy.

[0061] Thirdly, a method for transmitting information is provided, the method being applicable to a second network device, comprising:

[0062] Receive first indication information from the terminal device, the first indication information being used to indicate the first beam and the first time;

[0063] Send the first indication information to the first network device;

[0064] The terminal device receives second indication information from the first network device. The second indication information is used to instruct the terminal device to measure at least one first reference signal, and the at least one first reference signal has a quasi-co-located (QCL) relationship with the first beam.

[0065] The terminal device receives third indication information, which is used for a second beam, the second beam being obtained by the terminal device from measuring the at least one first reference signal;

[0066] Send the third indication information to the first network device;

[0067] Wherein, the first time is used to obtain the second time when the first network device sends the first configuration information, the first configuration information indicates that the transmission beam of the control channel or data channel is the second beam, and the second time is not earlier than the first time.

[0068] In the above scheme, before the terminal device moves from the coverage area of ​​the second network device to the coverage area of ​​the first network device, the terminal device can send a first indication information to the second network device in advance, indicating a first beam and a first time. The second network device can forward the first indication information to the first network device. Upon receiving the first indication information, the first network device sends a second indication information to the second network device, which then forwards the second indication information to the terminal device. The terminal device can measure at least one first reference signal based on the second indication information to obtain the second beam. The terminal device then sends a third indication information to the second network device, indicating the second beam. The second network device forwards the third indication information to the first network device. The second time when the first network device sends the first configuration information is obtained based on the first time. The first time can be a future time, meaning the terminal device can predict the first beam in advance. The second time is no earlier than the first time, and it can also be a future time. When the future second time arrives, the first network device can send the first configuration information for configuring the second beam. This avoids the time delay caused by determining the first beam after beam failure, thereby improving transmission reliability.

[0069] In some possible implementations, the second indication information is used to instruct the terminal device to measure at least one first reference signal at a third time.

[0070] The third moment is earlier than the first moment.

[0071] In some possible implementations, the second indication information is used to instruct the terminal device to measure at least one first reference signal at a third time.

[0072] The third moment is later than the first moment.

[0073] In some possible implementations, the transmission beam of the control channel or the data channel is the first beam, occurring between the first time point and the second time point.

[0074] In some possible implementations, the difference between the second time point and the first time point is less than a preset value.

[0075] The beneficial effects of the third aspect can be found in the description of the first aspect.

[0076] Fourthly, a communication device is provided, which is used to execute the method in any possible implementation of the first aspect, or the method in any possible implementation of the second aspect, or the method in any possible implementation of the third aspect, or other methods described in the embodiments of this application. Optionally, the communication device may include units of the methods described in any embodiment of this application. Optionally, the communication device may include a processing unit and a transceiver unit. The transceiver unit can communicate with the outside, and the processing unit is used for data processing. The transceiver unit may also be referred to as a communication interface or a communication unit.

[0077] The communication device can be used to perform the actions performed by the terminal device in any possible implementation of the first aspect. In this case, the communication device can be referred to as the terminal device. The transceiver unit is used to perform the transceiver-related operations on the terminal device side in any possible implementation of the first aspect, and the processing unit is used to perform the processing-related operations on the terminal device side in any possible implementation of the first aspect.

[0078] The communication device can be used to perform the actions performed by the first network device in any possible implementation of the second aspect. In this case, the communication device can be referred to as the first network device. The transceiver unit is used to perform the transceiver-related operations on the first network device side in any possible implementation of the second aspect, and the processing unit is used to perform the processing-related operations on the first network device side in any possible implementation of the second aspect.

[0079] The communication device can be used to perform the actions performed by the second network device in any possible implementation of the third aspect. In this case, the communication device can be referred to as the second network device. The transceiver unit is used to perform the transceiver-related operations on the second network device side in any possible implementation of the third aspect, and the processing unit is used to perform the processing-related operations on the second network device side in any possible implementation of the third aspect.

[0080] Fifthly, a communication device is provided, comprising a processor and a memory, the processor being coupled to the memory, the memory being used to store computer programs or instructions, and the processor being used to execute the computer programs or instructions stored in the memory, such that the method in the first aspect or any possible implementation thereof is executed, or the method in the second aspect or any possible implementation thereof is executed, or the method in the third aspect or any possible implementation thereof is executed, or the method described in other embodiments of this application is executed.

[0081] For example, the processor is used to execute computer programs or instructions stored in memory, causing the communication device to perform the methods in the first aspect or any possible implementation of the first aspect, or to perform the methods in the second aspect or any possible implementation of the second aspect, or to perform the methods in the third aspect or any possible implementation of the third aspect.

[0082] Optionally, the device may include one or more processors.

[0083] Optionally, the device may also include a memory coupled to the processor.

[0084] Optionally, the device may include one or more memories.

[0085] Alternatively, the memory can be integrated with the processor or set up separately.

[0086] Optionally, the device may also include a transceiver.

[0087] A sixth aspect provides a communication system comprising at least two of the following: a communication device for performing the method in any possible implementation of the first aspect as described in the fourth aspect; a communication device for performing the method in any possible implementation of the second aspect as described in the fourth aspect; and a communication device for performing the method in any possible implementation of the third aspect as described in the fourth aspect; or, the communication system comprises at least two of the following: a communication device for performing the method in any possible implementation of the first aspect as described in the fifth aspect; a communication device for performing the method in any possible implementation of the second aspect; and a communication device for performing the method in any possible implementation of the third aspect.

[0088] In a seventh aspect, a computer-readable storage medium is provided having a computer program (also referred to as instructions or code) for implementing the methods of any of the aspects or any possible implementations of the aspects.

[0089] For example, when the computer program is executed by a computer, it enables the computer to perform the methods of the first aspect or any possible implementation thereof. The computer may be a communication device.

[0090] For example, when the computer program is executed by a computer, it enables the computer to perform the methods of the second aspect or any possible implementation thereof. The computer may be a communication device.

[0091] For example, when the computer program is executed by a computer, it enables the computer to perform the methods of the third aspect or any possible implementation thereof. The computer may be a communication device.

[0092] Eighthly, this application provides a chip including a processor. The processor is configured to read and execute a computer program stored in a memory to perform the methods of the first aspect and any possible implementation thereof, or to perform the methods of the second aspect and any possible implementation thereof, or to perform the methods of the third aspect and any possible implementation thereof, or to perform the methods described in other embodiments of this application.

[0093] Optionally, the chip further includes a memory, which is connected to the processor via a circuit or wire.

[0094] Ninthly, this application provides a computer program product comprising a computer program (also referred to as instructions or code), wherein when the computer program is executed by a computer, the computer implements the method of the first aspect or any possible implementation thereof, or, when the computer program is executed by a computer, the computer implements the method of the second aspect or any possible implementation thereof, or, when the computer program is executed by a computer, the computer implements the method of the third aspect or any possible implementation thereof, or, when the computer program is executed by a computer, the computer implements the method of any embodiment of this application.

[0095] In a tenth aspect, this application provides a communication device comprising units for implementing the method described in any embodiment of this application. Attached Figure Description

[0096] Figure 1 This is a schematic diagram of a communication system provided in an embodiment of this application.

[0097] Figure 2 This is a schematic diagram of an application scenario provided in an embodiment of this application.

[0098] Figure 3 This is a schematic diagram of another application scenario provided by the embodiments of this application.

[0099] Figure 4 This is a schematic diagram of another application scenario provided in the embodiments of this application.

[0100] Figure 5 This is a schematic diagram of another application scenario provided in the embodiments of this application.

[0101] Figure 6 This is a beam diagram provided in an embodiment of this application.

[0102] Figure 7 This is a schematic diagram of a method for transmitting information provided in an embodiment of this application.

[0103] Figure 8 This is a schematic diagram illustrating the relationship between different moments provided in the embodiments of this application.

[0104] Figure 9 This is another schematic diagram illustrating the relationship between different moments provided in the embodiments of this application.

[0105] Figure 10 This is another schematic diagram illustrating the relationship between different moments provided in the embodiments of this application.

[0106] Figure 11 This is a schematic diagram of another method for transmitting information provided in an embodiment of this application.

[0107] Figure 12 This is a schematic diagram of another method for transmitting information provided in the embodiments of this application.

[0108] Figure 13 This is a schematic block diagram of a communication device provided in an embodiment of this application. Detailed Implementation

[0109] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0110] It should be understood that the methods, situations, categories, and classifications of embodiments in this application are for the convenience of description only and should not constitute a special limitation. Various methods, categories, situations, and features in embodiments can be combined without contradiction.

[0111] It should also be understood that the terms "first," "second," and "third" in the embodiments of this application are for distinction only and should not constitute any limitation on this application. It should also be understood that in the various embodiments of this application, the sequence number of each process does not imply the order of execution; the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0112] Figure 1This is a schematic diagram of a communication system to which this application's embodiments apply. Figure 1 As shown, the wireless communication system may include network device 110 and one or more terminal devices (e.g., Figure 1 The terminal device 120 shown communicates with the network device 110. When the network device 110 sends a signal, the network device 110 is the transmitter and the terminal device 120 is the receiver. Conversely, when the terminal device 120 sends a signal, the terminal device 120 is the transmitter and the network device 110 is the receiver.

[0113] Network device 110 can be an access network device for communicating with terminal device 110. This access network device can be a base station (BTS) in a GSM or CDMA system, a base station node B (NB) in a WCDMA system, an evolved Node B (eNB) in an LTE system, a radio controller in a cloud radio access network (CRAN) scenario, a next-generation base station (g node B, gNB) in 5G (5th generation mobile networks), i.e., new radio access (NR), or a base station in other future network systems. Alternatively, network device 110 can be a relay station, access point, vehicle-mounted equipment, wearable devices, or network equipment in future 5G networks or future evolved PLMN networks, etc., and this application embodiment is not limited to these categories.

[0114] Terminal equipment 120 can refer to user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication equipment, user agent, or user device. Terminal equipment can also be a cellular phone, cordless phone, session initiation protocol (SIP) phone, wireless local loop (WLL) station, personal digital assistant (PDA), handheld device with wireless communication capabilities, computing device or other processing device connected to a wireless modem, vehicle-mounted device, handheld device, wearable device, computing device, portable device, or vehicle-mounted device, etc., as well as a smartphone, smart glasses, terminal equipment in a 5G network, or terminal equipment in a future evolved public land mobile network (PLMN), etc. This application embodiment does not limit this to any particular type.

[0115] For ease of description, the device numbers will be omitted below. For example, "terminal device" means "terminal device 120" and "network device" means "network device 110".

[0116] In New Radio (NR), the first network device and the terminal device need to perform beam pairing to communicate using the paired beams. However, if the paired beams fail or the link quality degrades, re-pairing is required. During re-pairing, the first network device periodically sends a reference signal, and the terminal device performs a coarse measurement; then the first network device sends the reference signal again, and the terminal device performs a fine measurement, thus completing the beam pairing. This re-pairing process between the terminal device and the first network device is relatively long. Because data transmission between the terminal device and the first network device may be impossible or lost during this process, it cannot meet the requirements for high-latency data transmission, resulting in poor transmission reliability.

[0117] For example, the first network device periodically transmits synchronization signal blocks (SSBs) through different beams. The terminal device can determine a coarse beam based on the reference signal receiving power (RSRP) of the measured SSB and indicate this coarse beam to the first network device. The first network device then transmits channel state information reference signals (CSI-RS) through multiple fine beams corresponding to this coarse beam. The terminal device can measure the RSRP of the CSI-RS, determine the fine beams, and indicate these fine beams to the first network device. In this way, the terminal device and the first network device can transmit data through the fine beams. However, this process may result in data transmission failure or data loss, thus leading to poor transmission reliability.

[0118] In the embodiments of this application, the beam through which the first network device transmits SSB can also be referred to as the SSB beam, and the beam through which the first network device transmits CSI-RS can also be referred to as the CSI-RS beam.

[0119] Optionally, the terminal device can use the channel quality indicator (CQI) and / or block error rate (BLER) to determine whether the link quality has degraded. This determines whether the CSI-RS beam currently used by the first network device can still be used. For example, if the BLER is greater than a preset BLER value, it indicates a link failure, and the CSI-RS beam currently used by the first network device is unavailable. The preset BLER value is either a value specified in the protocol or a value configured by the first network device, such as a preset BLER value of 10%. Alternatively, if the CQI drop exceeds a drop threshold, it indicates a link failure, and the CSI-RS beam currently used by the first network device is unavailable. The drop threshold is either a value specified in the protocol or a value configured by the first network device.

[0120] The following describes some possible use cases.

[0121] Scene 1: Obscuring the scene.

[0122] When the beam between the terminal device and the first network device is blocked, it can cause significant signal attenuation, leading to a decrease in link quality or even link failure. After the terminal device enters the blocked area, it needs to re-establish the CSI-RS beam. For example... Figure 2As shown, the terminal device is a vehicle. At time t1, the CSI-RS beam paired between the terminal device and the first network device can transmit data or control channels. As the terminal device moves, at time t2, the terminal device can continue scanning the CSI-RS beam of the first network device to track the CSI-RS beam with better signal quality. As the terminal device moves, at time t3, an obstruction occurs between the terminal device and the first network device, causing the link between the terminal device and the first network device to fail or the link quality to degrade. The terminal device needs to rescan the SSB beam transmitted by the first network device. The terminal device scans for the SSB beam with better reference signal receiving power (RSRP) and reports it to the first network device. The terminal device initiates random access with the first network device through the scanned SSB beam. After successful random access, the first network device transmits CSI-RS signals through multiple CSI-RS beams corresponding to the SSB beam. The terminal device scans multiple CSI-RS beams and, at time t4, determines the CSI-RS beam with the best RSRP as the CSI-RS beam corresponding to the path after the blockage. The terminal device can then indicate the corresponding CSI-RS beam to the first network device. In this way, the terminal device and the first network device can transmit data or control channels through the CSI-RS beam corresponding to the path after the blockage. In other words, the obstruction event occurs at time t3, but the CSI-RS beam corresponding to the path after obstruction is determined at time t4. This will cause transmission interruption or link quality degradation during the period from time t3 to time t4. Since the first network device periodically sends SSBs, the terminal device takes a long time to scan the SSB beam and determine the SSB with better RSRP. That is, the period from t3 to t4 is relatively long. This will lead to a longer transmission interruption or link quality degradation, affecting transmission latency, especially for ultra-reliable low-latency communication (URLLC) services.

[0123] Scene 2: Leaving the obstructed scene.

[0124] When a terminal device and a first network device are in an obstructed environment, the first network device can transmit data or control channels via the CSI-RS beam. As the terminal device moves, it needs to leave the obstructed environment. After the terminal device leaves the obstructed environment, the CSI-RS beam used by the first network device in the obstructed environment may not be the optimal CSI-RS beam. If the first network device continues to use the same CSI-RS beam after the terminal device leaves the obstructed environment, it may lead to a degraded link quality or even link failure. Figure 3 As shown, the terminal device is a vehicle. At time t5, the paired CSI-RS beams of the terminal device and the first network device can transmit data or control channels under obstructed conditions. As the terminal device moves, at time t6, the terminal device moves outside the obstructed area, causing the link between the terminal device and the first network device to fail or degrade in quality. The terminal device needs to rescan the SSB beams sent by the first network device. The terminal device scans for an SSB beam with a good reference signal receiving power (RSRP) and reports it to the first network device. The terminal device initiates random access with the first network device through the scanned SSB beam. After successful random access, the first network device sends CSI-RS through multiple CSI-RS beams corresponding to the SSB beam. The terminal device scans multiple CSI-RS beams and at time t7 determines the CSI-RS beam with a good RSRP as the CSI-RS beam corresponding to the new path. The terminal device can indicate to the first network device the CSI-RS beam corresponding to the path where the obstruction disappears. In this way, the terminal device and the first network device can transmit data or control channels through the CSI-RS beam corresponding to the path after the obstruction disappears. That is, the obstruction event disappears at time t6, but the CSI-RS beam corresponding to the path after the obstruction disappears is only determined at time t7. This will cause transmission interruption or link quality degradation during the period from time t6 to time t7. Because the first network device periodically sends SSBs, the terminal device takes a long time to scan the SSB beam and determine the SSB with a good RSRP, meaning the period from t6 to t7 is relatively long. This leads to a prolonged transmission interruption or link quality degradation, affecting transmission latency, especially for ultra-reliable low-latency communication (URLLC).

[0125] Scenario 3: Entering and leaving a scene where something is obscured.

[0126] When the beam between the terminal device and the first network device encounters obstruction, it leads to significant signal attenuation, resulting in degraded link quality or even link failure. After entering the obstructed environment, the terminal device needs to re-determine the CSI-RS beam. In the obstructed environment, the first network device can transmit data or control channels using the re-determined CSI-RS beam. As the terminal device moves, it must leave the obstructed environment. After leaving the obstructed environment, the CSI-RS beam used by the first network device in the obstructed environment may not be the optimal one. If the first network device continues to use the same CSI-RS beam after leaving the obstructed environment, it may lead to degraded link quality or link failure. Figure 4As shown, the terminal device is a vehicle. At time t8, the CSI-RS beams paired between the terminal device and the first network device can transmit data or control channels. As the terminal device moves, at time t9, an obstruction occurs between the terminal device and the first network device, causing link failure or link quality degradation. The terminal device needs to rescan the SSB beams sent by the first network device. The terminal device scans for an SSB beam with a good RSRP and reports it to the first network device. The terminal device initiates random access with the first network device through the scanned SSB beam. After successful random access, the first network device sends CSI-RS signals through multiple CSI-RS beams corresponding to that SSB beam. The terminal device scans multiple CSI-RS beams and at time t10 determines the CSI-RS beam with the good RSRP as the CSI-RS beam corresponding to the obstructed path. The terminal device can indicate the CSI-RS beam corresponding to the obstructed path to the first network device. Thus, the terminal device and the first network device can transmit data or control channels through the CSI-RS beam corresponding to the obstructed path. In other words, the obstruction event occurs at time t9, but the CSI-RS beam corresponding to the new path is only determined at time t10. This will cause transmission interruption or link quality degradation during the period from time t9 to time t10. Since the first network device periodically sends SSBs, the terminal device takes a long time to scan the SSB beams and determine the SSB with a better RSRP. This means the period from t9 to t10 is relatively long, leading to a prolonged transmission interruption or link quality degradation, affecting transmission latency, especially for URLLC services. As the terminal device moves, at time t11, the terminal device moves outside the obstruction area, causing the link between the terminal device and the first network device to fail or the link quality to degrade. The terminal device needs to rescan the SSB beams sent by the first network device. The terminal device scans for an SSB beam with a better RSRP and reports it to the first network device. The terminal device initiates random access with the first network device through the scanned SSB beam. After successful random access, the first network device transmits CSI-RS through multiple CSI-RS beams corresponding to the SSB beam. The terminal device scans multiple CSI-RS beams and, at time t12, determines the CSI-RS beam with the better RSRP as the CSI-RS beam corresponding to the path leaving the obstruction. The terminal device can then indicate the CSI-RS beam corresponding to the path leaving the obstruction to the first network device. In this way, the terminal device and the first network device can transmit data or control channels through the CSI-RS beam corresponding to the path leaving the obstruction.In other words, if the obstruction event disappears at time t11, but the CSI-RS beam corresponding to the path after the obstruction disappears is determined at time t12, it will cause transmission interruption or link quality degradation during the period from time t11 to time t12. Since the first network device periodically sends SSB, the terminal device takes a long time to scan the SSB beam and determine the SSB with better RSRP. That is, the period from t11 to t12 is relatively long. This will lead to a longer transmission interruption or link quality degradation, affecting transmission latency, especially having a greater impact on URLLC services.

[0127] Scenario 4: Switching network devices.

[0128] As the terminal device moves, it may move from the coverage area of ​​the second network device to the coverage area of ​​the first network device. When the terminal device is within the coverage area of ​​the second network device, the CSI-RS beam of the second network device is the transmit beam for either the data channel or the control channel. However, when the terminal device moves from the coverage area of ​​the second network device to the coverage area of ​​the first network device, since the terminal device is now far from the coverage area of ​​the second network device, if the terminal device continues to transmit data with the CSI-RS beam of the second network device, it may lead to transmission failure or degraded link quality, affecting transmission latency. For example... Figure 5As shown, the terminal device is a vehicle. At time t13, the CSI-RS beams paired between the terminal device and the second network device can transmit data or control channels. As the terminal device moves, at time t14, it moves away from the coverage area of ​​the second network device and to the boundary between the first and second network devices. During this movement, the link quality degrades, requiring the terminal device to rescan the SSB beams sent by the first network device. The terminal device scans for an SSB beam with a good RSRP and reports it to the second network device, which then sends the SSB to the first network device. The terminal device obtains the SSB beam with the optimal RSRP from the scanned beam and initiates random access with the first network device under that beam. After successful random access, the first network device sends multiple CSI-RS beams corresponding to that SSB beam. The terminal device scans these multiple CSI-RS beams and, at time t15, determines the CSI-RS beam with the best RSRP as the first network device's CSI-RS beam. The terminal device can then indicate the CSI-RS beam to the first network device. In this way, the terminal device and the first network device can transmit data channels or control channels through the CSI-RS beam of the first network device. That is, if the link quality begins to degrade at time t14 and the CSI-RS beam of the first network device is only determined at time t15, it will lead to transmission interruption or link quality degradation during the period from time t14 to time t15. Since the first network device periodically sends SSBs, the terminal device takes a relatively long time to scan the SSB beam and determine the SSB with a good RSRP, meaning the period from t14 to t15 is relatively long. This results in a prolonged transmission interruption or link quality degradation, affecting transmission latency, especially significantly impacting URLLC services.

[0129] In this embodiment, the terminal device can send first indication information to the first network device. The first indication information is used to indicate a first beam and a first time. Then, the terminal device receives second indication information, which instructs the terminal device to measure at least one first reference signal. Since at least one first reference signal has a quasi-co-location (QCL) relationship with the first beam, the terminal device can determine a second beam by measuring at least one first reference signal. The second beam can be used as the transmission beam of a data channel or a control channel. The first time can be a future time. Therefore, in this embodiment, the first beam at a future time can be indicated to the first network device in advance, and the second beam can be determined based on at least one first reference signal that has a QCL relationship with the first beam. This can avoid situations where data transmission cannot be completed or data is lost, and is beneficial to improving the reliability of transmission.

[0130] The following is a detailed explanation of the terminology used in this application:

[0131] 1. Beam

[0132] In the NR protocol, beams can be represented as spatial domain filters, or spatial parameters. The beam used to transmit signals can be called the transmission beam (Tx beam), or a spatial domain transmission filter, or a spatial transmission parameter; the beam used to receive signals can be called the reception beam (Rx beam), or a spatial domain receive filter, or a spatial RX parameter.

[0133] The transmitting beam can refer to the distribution of signal strength in different directions in space after a signal is transmitted through an antenna, while the receiving beam can refer to the distribution of signal strength in different directions in space of a wireless signal received from an antenna.

[0134] Furthermore, the beam can be a wide beam, a narrow beam, or other types of beam. The beamforming technology can be beamforming technology or other technologies. Specifically, beamforming technology can be digital beamforming technology, analog beamforming technology, or hybrid digital / analog beamforming technology, etc.

[0135] Optionally, a wide beam can also be called a coarse beam; alternatively, a narrow beam can also be called a fine beam or a sub-beam. Optionally, the first network device can transmit an SSB using the coarse beam. Optionally, the first network device can transmit a channel state information reference signal (CSI-RS) using the fine beam. Optionally, if the coarse beam and CSI-RS have a QCL relationship, the direction of the coarse beam includes the direction of the fine beam transmitting the CSI-RS. Optionally, the fine beam can be a component, sub-component, or beam component of the coarse beam, such as... Figure 6 As shown, a thin beam can be a sub-direction of a thick beam or the L-degree of a beam, such as L, etc. 5.

[0136] Optionally, multiple beams with the same or similar communication characteristics can be considered as a single beam. A beam may include one or more antenna ports for transmitting data channels, control channels, and detection signals, etc. One or more antenna ports forming a beam can also be considered as a set of antenna ports.

[0137] Alternatively, a beam can correspond to a beam index, so a beam can be uniquely identified by a beam index.

[0138] 2. SSB

[0139] The SSB includes the primary synchronization signal (PSS), secondary synchronization signal (SSS), physical broadcast channel (PBCH), and demodulation reference signal (DMRS) required for demodulating the PBCH. The PSS and SSS are used for downlink synchronization by terminal equipment, including timing synchronization, frame synchronization, and symbol synchronization; the PSS and SSS are also used to obtain the cell identifier (ID) and measure cell signal quality. The PBCH carries the master information block (MIB) content.

[0140] 3. QCL Relationship

[0141] The QCL relationship between a certain beam and a certain reference signal can be understood as: the beam is similar to the beam that transmits the reference signal, or the beam is approximately correlated with the beam that transmits the reference signal.

[0142] The following is combined with Figure 7 The method 700 for transmitting information provided in the embodiments of this application is described as follows: Figure 7 As shown, method 700 includes:

[0143] S701, the terminal device sends first indication information to the first network device, and the first network device receives the first indication information from the terminal device. The first indication information is used to indicate the first beam.

[0144] Optionally, the first indication information is used to indicate the first beam and the first time. Optionally, the first time is a future time, and the first network device can determine the first beam as the beam of the future first time based on the first time indicated by the first indication information.

[0145] Optionally, in an occlusion scenario, the first moment can be the moment when the terminal device enters the occlusion or the moment when the occlusion occurs, for example, in Figure 2 In the scenario shown, the first moment is t3. Optionally, the terminal device can predict the first location where occlusion occurs, and the terminal device can predict the time when the terminal device will arrive at the first location in the future based on the current location of the terminal device, the speed of the terminal device, and the current moment, which is the first moment.

[0146] Optionally, in the scenario of leaving the obstruction, the first moment can be the moment when the terminal device leaves the obstruction, for example, in Figure 3 In the scenario shown, the first moment is t6. Optionally, the terminal device can predict the second location where the occlusion disappears, and the terminal device can predict the moment when the terminal device reaches the second location based on the terminal device's current location, the terminal device's movement speed, and the current moment, which is the first moment.

[0147] Optionally, the first indication information is used to indicate the first beam and to indicate that the first beam is a future beam. Optionally, the first indication information is used to indicate the first beam and to indicate that the first beam is the SSB beam that the first network device will pair with the terminal device in the future.

[0148] Optionally, "first moment" can be replaced with "first time period". The first indication information can indicate the first time period. Optionally, the first indication information can indicate the first time period by indicating the start time of the first time period, and the length of the first time period can be a preset length. That is, if the first indication information indicates the first moment, it can also be understood as the first indication information indicating the first time period.

[0149] Optionally, when the terminal device executes S701, the terminal device is at its current location, and the first indication information can indicate the first beam and the first position. Optionally, the first position is the future location of the terminal device. The first network device can obtain the real-time position of the terminal device. Since the first position is different from the current position, the first network device can determine the first beam as the future beam based on the first position indicated by the first indication information.

[0150] Optionally, the terminal device can determine the first moment based on its current position, current time, movement speed, and first position. Alternatively, the terminal device can determine the first moment when it moves to the first position based on the distance between the first position and its current position, the distance, the current time, and its movement speed.

[0151] Optionally, the first beam is a wide beam, a thick beam, or an SSB beam.

[0152] Optionally, if the first indication information indicates the first beam, the first indication information may be a first index, and the first index may uniquely indicate the first beam.

[0153] Optionally, prior to S701, method 700 may further include: the terminal device determining the first beam.

[0154] The terminal device may determine the first beam using any of the following methods.

[0155] Method 1: The terminal device predicts the first beam.

[0156] Optionally, the terminal device can predict the first beam based on historical data from other terminal devices. Alternatively, the terminal device can predict the first beam based on its own movement path and historical data from other terminal devices.

[0157] Optionally, the historical data of other terminal devices may include: the movement paths of other terminal devices and the SSB beams of the first network device paired with other terminal devices when other terminal devices move to the first location.

[0158] Optionally, the terminal device's current location is its current position, and its movement path passes through both the current location and a future first location. The terminal device predicts a first beam based on its movement path and historical data from other terminal devices. This prediction includes: the SSB beam paired with other terminal devices by the first network device when the terminal device moves to the first location, which serves as the first beam. In other words, if the spatial correspondence between the SSB beam and the terminal device remains unchanged, the SSB beam paired with other terminal devices by the first network device when the terminal device moves to the first location can be used as the first beam paired with the terminal device by the first network device when the terminal device moves to the first location.

[0159] Optionally, the current location of the terminal device is the current location, and the movement path of the terminal device passes through the current location and the future first location. The terminal device predicts the first beam based on the movement path of the terminal device and historical data of other terminal devices, including: if the fifth beam is the same as the sixth beam, then the terminal device determines the seventh beam as the first beam. The fifth beam is the beam that the first network device paired with other terminal devices before other terminal devices move to the first location, the sixth beam is the beam that the first network device paired with the terminal device before the terminal device moves to the first location, and the seventh beam is the beam that the first network device paired with other terminal devices after other terminal devices move to the first location. For example, in an obstruction scenario, the fifth beam is the SSB beam corresponding to the CSI-RS beam paired with other terminal devices before other terminal devices enter the obstruction; the seventh beam is the SSB beam corresponding to the CSI-RS beam paired with other terminal devices after other terminal devices enter the obstruction; and the sixth beam is the SSB beam corresponding to the CSI-RS beam paired with the terminal device before the terminal device enters the obstruction.

[0160] Optionally, the terminal device's movement path passes through its current location and a future first location. The terminal device predicts a first beam based on its movement path and historical data from other terminal devices, including: if the fifth beam and the sixth beam are different, the terminal device determines the first beam based on the difference between the index of the sixth beam and the index of the fifth beam, and the seventh beam. Optionally, the terminal device determines the first beam based on the difference between the index of the sixth beam and the index of the fifth beam, and the seventh beam, including: the terminal device adds the difference to the index of the seventh beam to determine the index of the first beam. Wherein, the fifth beam is the beam paired between the first network device and other terminal devices before other terminal devices move to the first location; the sixth beam is the beam paired between the first network device and the terminal device before the terminal device moves to the first location; and the seventh beam is the beam paired between the first network device and other terminal devices after the other terminal devices move to the first location. For example, if the fifth, sixth, and seventh beams are all SSB beams, with the index of the fifth beam being 1, the index of the sixth beam being 3, and the index of the seventh beam being 5, then the index of the first beam is 7(3+(5-1)). In other words, if the spatial correspondence between the SSB beams changes, the terminal device can determine the first beam paired with the first network device when it moves to the first position based on the change in beam indices between the previous and subsequent movements of other terminal devices.

[0161] Method 2: The cloud predicts the first beam and indicates the first beam to the terminal device.

[0162] The process of cloud-based prediction of the first beam is the same as that of the terminal device. The difference lies in that the terminal device can report its movement path to the cloud and can also report its location information to the cloud in real time. The cloud then determines the first beam based on the terminal device's location information. For example, if the terminal device's location information indicates its current location, the cloud can determine the first beam based on the current location, the terminal device's movement path, and other historical data from the terminal device.

[0163] In other words, in S701, the terminal device can predict the first beam that the first network device will pair with in the future based on historical data from other terminal devices, and indicate the first beam to the first network device through first indication information, indicating that the first beam is the beam that the first network device will pair with the terminal device in the future, rather than the beam that is currently paired with the terminal device. For example, in Figure 2 In the case of obstruction, the terminal device can predict the obstruction that will occur at time t3 based on the historical data of other terminal devices at time t1. At this time, the first time is t3. The terminal device can indicate the first beam and t3 through the first indication information. In this way, after the obstruction occurs at time t3, the terminal device does not need to measure the SSB to determine the first beam, thereby saving latency.

[0164] Optionally, S701 includes: the terminal device sending first indication information to the first network device through the physical uplink shared channel (PUSCH), and the first network device receiving the first indication information through the PUSCH.

[0165] Optionally, the first network device configures the terminal device with periodic resources for reporting the tracking CSI-RS beam. S701 includes: the terminal device can send first indication information to the first network device on the resources for reporting the tracking CSI-RS, and the first network device receives the first indication information on the configured periodic resources for reporting the tracking CSI-RS beam.

[0166] Optionally, S701 includes: the terminal device sending first indication information to the first network device via a physical uplink control channel (PUCCH), and the first network device receiving the first indication information via the PUCCH. Specifically, the first network device may send downlink control information (DCI) to the terminal device, the DCI indicating the resource on which the first indication information is sent, the terminal device sending the first indication information to the first network device on the resource indicated by the DCI, and the first network device receiving the first indication information on the resource indicated by the DCI.

[0167] S702, the first network device sends a second instruction information, and the terminal device receives the second instruction information, which instructs the terminal device to measure at least one first reference signal.

[0168] Optionally, at least one first reference signal may be at least one CSI-RS.

[0169] Optionally, at least one first reference signal has a QCL relationship with the first beam. Optionally, the beam transmitting at least one first reference signal is an approximate beam or an approximately related beam to the first beam. Since at least one first reference signal has a QCL relationship with the first beam, the terminal device avoids needing to search the entire space for at least one first reference signal. This reduces the search beam range and saves time in determining the second beam.

[0170] Optionally, the direction of the first beam includes the direction of the beam that transmits at least one first reference signal.

[0171] Optionally, the second indication information may be configuration information for at least one first reference signal. In this way, the terminal device can measure at least one first reference signal and determine the second beam based on the configuration information of the at least one first reference signal. Optionally, the configuration information of the at least one first reference signal may indicate the time-domain location and / or frequency location of the at least one first reference signal transmitted by the first network device.

[0172] Optionally, at least one first reference signal may be at least one CSI-RS transmitted by the first network device.

[0173] Optionally, the first network device can transmit at least one CSI-RS through at least one sub-beam corresponding to the first beam, and the terminal device can measure at least one CSI-RS and determine the sub-beam corresponding to the CSI-RS with the higher or highest RSRP as the second beam.

[0174] The following discussion focuses on the case where the terminal device measures at least one first reference signal.

[0175] Scenario 1: The terminal device measures at least one first reference signal before the first moment.

[0176] Optionally, the second indication information instructs the terminal device to measure at least one first reference signal at a third time. The third time is no later than the first time. The terminal device needs to measure at least one first reference signal at the third time before the first time; that is, the terminal device needs to measure at least one first reference signal and determine the second beam in advance. This allows the first network device to directly transmit control or data channels through the second beam after the first time, saving the time delay caused by the terminal device determining the second beam after the first time. Optionally, the first beam is an SSB beam, and the second beam is a CSI-RS beam. This allows the terminal device to determine the corresponding CSI-RS beam for the SSB beam before the first time, avoiding the time delay caused by scanning the SSB beam and determining the CSI-RS beam after the first time.

[0177] Optionally, the third time point can be replaced with a third time period. The second indication information can instruct the terminal device to measure at least one first reference signal during the third time period. Optionally, the second indication information can indicate the third time period by indicating the start time of the third time period, and the length of the third time period can be a preset length. That is, if the second indication information indicates a third time point, it can also be understood as the second indication information indicating a third time period. In this way, the terminal device can measure at least one first reference signal within the third time period.

[0178] For example, in Figure 2 In the obstruction scenario shown, the first time point can be t3. The terminal device can determine the CSI-RS beam corresponding to the SSB beam before time point t3. That is, the terminal device needs to determine the CSI-RS beams paired between the first network device and the terminal device after the obstruction occurs before the obstruction occurs. This helps to save latency, for example, it can save [time / effort]. Figure 2 The time delay from time t3 to time t4 is shown.

[0179] For example, in Figure 3 In the scenario shown where the obstruction is removed, the first time point can be t6. The terminal device can determine the CSI-RS beam corresponding to the SSB beam before t6. In other words, the terminal device needs to determine the CSI-RS beams paired between the first network device and the terminal device after the obstruction disappears before leaving the obstruction. This helps save latency, for example, it can save [time / efficiency]. Figure 3 The time delay shown is from time t6 to time t7.

[0180] For example, in Figure 4In the scenario of entering and exiting the obstruction, the first time point can be t9. The terminal device can determine the CSI-RS beam corresponding to the SSB beam before t9. In other words, the terminal device needs to determine the CSI-RS beams paired between the first network device and the terminal device after the obstruction occurs before the obstruction occurs. This helps save latency and reduces time consumption. Figure 4 The time delay shown is from time t9 to time t10; the first time can also be time t11. The terminal device can determine the CSI-RS beam corresponding to the SSB beam before time t11. That is, the terminal device needs to determine the CSI-RS beam that the first network device and the terminal device will pair up after the obstruction disappears before leaving the obstruction. This helps to save time delay and can save [time / effort]. Figure 4 The time delay shown is from time t11 to time t12. Thus, in Figure 4 In the scenario shown, the time delays during the periods from t9 to t10 and from t11 to t12 can be saved.

[0181] Scenario 2: The terminal device measures at least one first reference signal after the first moment.

[0182] Optionally, the second indication information instructs the terminal device to measure at least one first reference signal at a third time. The third time is no earlier than the first time. The terminal device can measure at least one first reference signal at a third time after the first time. Optionally, the first beam is an SSB beam and the second beam is a CSI-RS beam, so that the terminal device can determine the SSB beam before the first time and determine the corresponding CSI-RS beam after the first time.

[0183] Optionally, the third time point can be replaced with a third time period. The second indication information can instruct the terminal device to measure at least one first reference signal during the third time period. Optionally, the second indication information can indicate the third time period by indicating the start time of the third time period, and the length of the third time period can be a preset length. That is, if the second indication information indicates a third time point, it can also be understood as the second indication information indicating a third time period. In this way, the terminal device can measure at least one first reference signal within the third time period.

[0184] For example, in Figure 2In the occlusion scenario shown, the first time point can be t3. The terminal device can determine the SSB beam before time point t3 and the corresponding CSI-RS beam after time point t3. In other words, the terminal device needs to determine the SSB beams of the first network device and the terminal device after the occlusion occurs before the occlusion occurs, and the terminal device needs to determine the corresponding CSI-RS beam after the occlusion occurs. This helps save time in determining the SSB beam. Since the terminal device takes a relatively long time to scan the SSB beam, the period from time point t3 to time point t4 is mostly the time for the terminal device to determine the SSB beam. Once the terminal device enters the occlusion, time can be saved... Figure 2 The time period from time t3 to time t4 is shown as most of the time.

[0185] For example, in Figure 3 In the scenario depicting the removal of obstruction, the first time point can be t6. The terminal device can determine the SSB beam before t6 and the corresponding CSI-RS beam after t6. In other words, the terminal device needs to determine the paired SSB beam between the first network device and the terminal device after the obstruction disappears before removing the obstruction, and then determine the corresponding CSI-RS beam after the obstruction disappears. This helps save time in determining the SSB beam. Since the terminal device takes a relatively long time to scan the SSB beam, the period from t6 to t7 is mostly the time for the terminal device to determine the SSB beam. Once the terminal device removes the obstruction, time can be saved... Figure 3 The time period from time t6 to time t7 is shown as most of the time.

[0186] For example, in Figure 4 In the scenario of entering and exiting an obstruction, the first time point can be t9. The terminal device can determine the SSB beam before t9 and the corresponding CSI-RS beam after t9. In other words, the terminal device needs to determine the SSB beams paired with the first network device after the obstruction occurs before the obstruction occurs, and the terminal device needs to determine the corresponding CSI-RS beam after entering the obstruction. This helps save time in determining the SSB beam. Since the terminal device takes a relatively long time to scan the SSB beam, the period from t9 to t10 is mostly the time for the terminal device to determine the SSB beam. After the terminal device enters the obstruction, this time can save time. Figure 4The timeframe from time t9 to t10 is shown as most of the time. The first timeframe could also be t11. The terminal device can determine the SSB beam before time t11 and the corresponding CSI-RS beam after time t11. In other words, the terminal device needs to determine the paired SSB beam between the first network device and the terminal device after the obstruction disappears before leaving the obstruction, and then determine the corresponding CSI-RS beam after the obstruction disappears. This helps save time in determining the SSB beam. Since the terminal device takes a relatively long time to scan the SSB beam, the period from time t11 to t12 is mostly the time for the terminal device to determine the SSB beam. Once the terminal device leaves the obstruction, time can be saved... Figure 4 This refers to most of the time between time t11 and time t12, as shown. Thus, in Figure 4 In the scenario shown, most of the time can be saved between time t9 and t10, and most of the time between time t11 and t12.

[0187] In other words, it should be noted that S701 and S702 can form an embodiment in which the terminal device can indicate the future first beam to the first network device at the current moment through the first indication information. This avoids the delay caused by the terminal device having to rescan the SSB in the event of a link failure, thus saving latency.

[0188] S703, the terminal device sends third indication information, and the first network device receives the third indication information. The third indication information is used to indicate the second beam, which is obtained by the terminal device by measuring at least one first reference signal.

[0189] Optionally, the third indication information can be a second index, which indicates a second beam.

[0190] Optionally, the second beam can be a thin beam or a narrow beam.

[0191] Optionally, the second beam can be a CSI-RS beam.

[0192] Optionally, for case one in S702, the terminal device may send the third instruction information after the third time and before the first time, and the first network device may receive the third instruction information after the third time and before the first time.

[0193] Optionally, for S702 case two, the terminal device can send the third instruction information after the third time and before the second time, and the first network device can receive the third instruction information after the third time and before the second time.

[0194] Optionally, S703 includes: the terminal device sending third indication information to the first network device via PUSCH, and the first network device receiving the third indication information via PUSCH.

[0195] Optionally, the first network device configures the terminal device with periodic resources for reporting the tracking CSI-RS beam. S703 includes: the terminal device can send third indication information to the first network device on the resources for reporting the tracking CSI-RS beam, and the first network device receives the third indication information on the configured periodic resources for reporting the tracking CSI-RS beam.

[0196] Optionally, S703 includes: the terminal device sending a first indication message to the first network device via PUCCH, and the first network device receiving a third indication message via PUCCH. Specifically, the first network device may send a DCI to the terminal device, the DCI may indicate the resource on which the third indication message is sent, the terminal device sends the third indication message to the first network device on the resource indicated by the DCI, and the first network device receives the third indication message on the resource indicated by the DCI.

[0197] S704, at the second moment, the first network device sends the first configuration information, and at the second moment, the terminal device receives the first configuration information, wherein the first configuration information indicates that the transmission beam of the control channel or the data channel is the second beam.

[0198] The second time point is obtained based on the first time point.

[0199] Optionally, the difference between the second time step and the first time step is less than a preset value. The preset value can be specified by the protocol or configured by the first network device. For example, the first time step could be... Figure 2 If the time between the second moment and the first moment is too long, as shown in the diagram, the first network device will not send the first configuration information until a relatively long time after the occlusion occurs, resulting in a situation where data cannot be transmitted for a long period of time between the second moment and the first moment.

[0200] Optionally, the first configuration information indicating that the transmission beam of the control channel or data channel is the second beam can be replaced with: the first configuration information indicating the transmission beam of the control channel or data channel; or it can also be replaced with: the first configuration information indicating that the transmission beam of the first network device is the second beam.

[0201] The following describes two methods for obtaining the second time step based on the first time step.

[0202] In one approach, the first network device can determine the second timeframe based on the first timeframe and its service congestion status. For example, if the first network device experiences significant congestion at the first timeframe but not at the second timeframe (later than the first timeframe), the first network device can determine to send the first configuration information to the terminal device at the second timeframe. Before sending the first configuration information to the terminal device, the first network device can indicate the second timeframe to the terminal device. In this way, the first network device can send the first configuration information at the second timeframe, and the terminal device can receive the first configuration information at the second timeframe.

[0203] Optionally, in Method 1, the transmission beam of the control channel or data channel is the first beam between the first time point and the second time point. That is, the first network device transmits the first configuration information at the second time point. The first time point can be the moment when the obstruction occurs or the moment when the obstruction disappears. Since the second time point is later than the first time point, the transmission between the terminal device and the first network device may be interrupted between the first and second time points. Therefore, the transmission beam of the control channel or data channel is the first beam between the first and second time points. In other words, the first beam can serve as a temporary transmission beam to avoid transmission interruption. At the second time point, the terminal device receives the first configuration information and can then determine whether the second beam is the transmission beam of the data channel or the control channel.

[0204] Optionally, in conjunction with S702, case one, such as Figure 8 As shown, the terminal device can measure at least one first reference signal at a third time, and transmit third indication information between the third time and the first time. Since the second time determined by the first network device is later than the first time, the transmission beam of the control channel or data channel can temporarily be the first beam between the first time and the second time. For example, the first time could be... Figure 2 In the scenario shown, at the moment of obstruction, the first beam can be the SSB beam. Thus, after the first moment of obstruction but before the terminal device and the first network device receive the first configuration information of the second beam, the SSB beam can serve as the transmit beam for the data or control channel, avoiding transmission interruption between the first and second moments. After receiving the first configuration information at the second moment, the second beam can be the CSI-RS beam corresponding to the SSB beam. Thus, after the second moment, the CSI-RS beam can serve as the transmit beam for the data or control channel. For example, the first moment could be... Figure 3In the scenario shown, at the moment of leaving the obstruction, the first beam can be the SSB beam. Thus, after the terminal device and the first network device leave the obstruction at the first moment but before receiving the first configuration information of the second beam, the SSB beam can serve as the transmission beam for the data channel or control channel, avoiding transmission interruption between the first and second moments. After receiving the first configuration information at the second moment, the second beam can be the CSI-RS beam corresponding to the SSB beam. Thus, after the second moment, the CSI-RS beam can serve as the transmission beam for the data channel or control channel. Figure 4 In the scenario shown Figure 2 and Figure 3 The scenario is similar, but to avoid redundancy, it will not be described in detail. Figure 8 In such scenarios, S701 can execute before the third moment.

[0205] Optionally, in conjunction with S702, case two, such as Figure 9 The terminal device can measure at least one first reference signal at a third time after the first time, and transmit third indication information between the third time and the second time. Since the second time determined by the first network device is later than the first time, the transmission beam of the control channel or data channel between the first time and the second time can temporarily be the first beam. For example, the first time could be... Figure 2 In the scenario shown, at the moment of obstruction, the first beam can be the SSB beam. Thus, after the first moment of obstruction but before the terminal device and the first network device receive the first configuration information of the second beam, the SSB beam can serve as the transmit beam for the data or control channel, avoiding transmission interruption between the first and second moments. After receiving the first configuration information at the second moment, the second beam can be the CSI-RS beam corresponding to the SSB beam. Thus, after the second moment, the CSI-RS beam can serve as the transmit beam for the data or control channel. For example, the first moment could be... Figure 3 In the scenario shown, at the moment of leaving the obstruction, the first beam can be the SSB beam. Thus, after the terminal device and the first network device leave the obstruction at the first moment but before receiving the first configuration information of the second beam, the SSB beam can serve as the transmission beam for the data channel or control channel, avoiding transmission interruption between the first and second moments. After receiving the first configuration information at the second moment, the second beam can be the CSI-RS beam corresponding to the SSB beam. Thus, after the second moment, the CSI-RS beam can serve as the transmission beam for the data channel or control channel. Figure 4 In the scenario shown Figure 2 and Figure 3 The scenarios are similar, but to avoid unnecessary details, they will not be described in detail.

[0206] Method 2: The second time is equal to the first time. That is, if the terminal device indicates the first time through the first indication information, then the first network device can send the first configuration information at the first time, and the terminal device can receive the first configuration information at the first time.

[0207] Optionally, in conjunction with S702, case one, such as Figure 10 As shown, the terminal device can measure at least one first reference signal at a third time before the first time and report third indication information before the first time. At the first time, the first network device can send first configuration information, thus avoiding transmission interruption. For example, the first time could be... Figure 2 In the scenario shown, at the moment the occlusion occurs, the first beam can be the SSB beam, and the second beam is the CSI-RS beam corresponding to the SSB beam. In this way, the terminal device and the first network device complete the measurement of at least one first reference signal and send third indication information before the first moment of occlusion. When the occlusion event occurs at the first moment, the CSI-RS beam corresponding to the SSB beam can be used as the transmission beam for both the data and control channels, thus avoiding transmission interruption. For example, the first moment could be... Figure 3 In the scenario shown, at the moment the obstruction disappears, the first beam can be the SSB beam, and the second beam is the CSI-RS beam corresponding to the SSB beam. In this way, the terminal device and the first network device complete the measurement of at least one first reference signal and send the third indication information before the first moment when the obstruction disappears. When the obstruction disappears at the first moment, the CSI-RS beam corresponding to the SSB beam can be used as the transmission beam of the data channel and the control channel, which can avoid transmission interruption.

[0208] Optionally, the second moment can be replaced with a second time period. In this way, the first network device can send the first configuration information during the second time period, and the terminal device can receive the first configuration information during the second time period. Optionally, the first network device can indicate the start time of the second time period to the terminal device, and the length of the second time period can be a preset length. That is, if the first network device indicates a second moment to the terminal device, it can also be understood as indicating a second time period. In this way, the terminal device can receive the first configuration information within the second time period.

[0209] Optionally, after S704, the method further includes: the terminal device sending fourth indication information, the fourth indication information indicating a fourth time, after the fourth time, the transmission beam of the control channel or data channel is a third beam, the third beam being the transmission beam of the control channel or data channel of the first network device before receiving the first indication information. Optionally, the third beam can be a CSI-RS beam. Optionally, the fourth time is the time of leaving the obstruction, and the terminal device can determine that it can leave the obstruction at the second position based on the second position of other terminal devices leaving the obstruction. The terminal device can predict the fourth time when the terminal device moves to the second position based on the current time, the second position, and the movement speed of the terminal device. Optionally, in Figure 4 The scenario shown illustrates entering and leaving an occluded environment. The fourth moment can be the moment of leaving the occluded environment, and the difference between the fourth moment and the first moment can be the duration of the occlusion. For example, the first moment could be... Figure 4 As shown in t9, the fourth time step can be Figure 4 As shown at time t11, the value of t11-t9 represents the duration of the obstruction. In other words, after the terminal device leaves the obstruction, the beam paired between the first network device and the terminal device can be the third beam the terminal device used before entering the obstruction. This third beam can be the CSI-RS beam; that is, the CSI-RS beam paired between the first network device and the terminal device after the terminal device leaves the obstruction can be the same CSI-RS beam the terminal device used before entering the obstruction.

[0210] Optionally, the control channel can be a downlink control channel, meaning the first network device can send signaling to the downlink control channel via the second beam. Optionally, the control channel can be a downlink data channel, meaning the first network device can send data to the downlink data channel via the second beam.

[0211] Optionally, the second beam can also be a receiving beam for a data channel or a control channel. Optionally, the data channel can be an uplink data channel, meaning the first network device can receive data from the uplink data channel through the second beam. Optionally, the control channel can be an uplink control channel, meaning the first network device can receive signaling from the uplink control channel through the second beam.

[0212] Optionally, after S704, the first network device can send signaling to the control channel or data to the data channel via the second beam.

[0213] Optionally, as described in S704, the first network device sends first configuration information at a second time, and the terminal device receives the first configuration information at the second time. In some possible embodiments, at the second time, the first network device sends data or signaling through a second beam, and at the second time, the terminal device receives the data or signaling sent by the first network device through the second beam. Before the first network device sends data or signaling through the second beam, the first network device may send the first configuration information, and the terminal device may receive the first configuration information. Thus, at the second time, the first network device can send data or signaling through the second beam according to the first configuration information, and at the second time, the terminal device can receive the data or signaling sent by the first network device through the second beam according to the first configuration information. That is to say, the embodiments described above regarding receiving the first configuration information at a second time can also be applied to receiving the data or signaling sent by the first network device through the second beam at a second time; however, to avoid redundancy, a detailed description is omitted.

[0214] In some embodiments, after executing method 700, the following can also be executed: Figure 11 The method 1100 shown includes:

[0215] S1101, the terminal device sends the fourth indication information, the first network device receives the fourth indication information, and the fourth indication information indicates the fourth time.

[0216] The fourth moment can be understood as the moment when the second configuration information of the fourth beam after the switch is received.

[0217] Optionally, the fourth moment is the moment of leaving the obstruction. The terminal device can determine that it can leave the obstruction at the second position based on the departure of other terminal devices from the obstruction. The terminal device can predict the fourth moment when it moves to the second position based on the current moment, the second position, and the speed of the terminal device.

[0218] Optionally, in Figure 4 The scenario shown illustrates entering and leaving an occluded environment. The fourth moment can be the moment of leaving the occluded environment, and the difference between the fourth moment and the first moment can be the duration of the occlusion. For example, the first moment could be... Figure 4 As shown in t9, the fourth time step can be Figure 4 At time t11, the value of t11-t9 represents the duration of the occlusion.

[0219] Optionally, when method 700 and method 1100 are combined, the terminal device may send the first instruction information and the fourth instruction information simultaneously, or it may send the first instruction information and the fourth instruction information separately.

[0220] Optionally, S1101 includes: the terminal device sending fourth indication information to the first network device via PUSCH, and the first network device receiving the fourth indication information via PUSCH.

[0221] Optionally, the first network device configures the terminal device with periodic resources for reporting the tracking CSI-RS beam. S1101 includes: the terminal device can send fourth indication information to the first network device on the resources for reporting the tracking CSI-RS beam, and the first network device receives the fourth indication information on the configured periodic resources for reporting the tracking CSI-RS beam.

[0222] Optionally, S1101 includes: the terminal device sending a fourth indication information to the first network device via PUCCH, and the first network device receiving the fourth indication information via PUCCH. Specifically, the first network device may send a DCI to the terminal device, the DCI may indicate the resource on which the fourth indication information is sent, the terminal device sends the fourth indication information to the first network device on the resource indicated by the DCI, and the first network device receives the fourth indication information on the resource indicated by the DCI.

[0223] S1102, the first network device sends a fifth indication message, and the terminal device receives the fifth indication message, which instructs the terminal device to measure at least one second reference signal.

[0224] Optionally, the fifth indication information may be configuration information for at least one second reference signal. In this way, the terminal device can measure at least one second reference signal and determine the fourth beam based on the configuration information of the at least one second reference signal. Optionally, the configuration information of the at least one second reference signal may indicate the time-domain and / or frequency-domain location of the at least one second reference signal transmitted by the first network device.

[0225] Optionally, at least one first reference signal may be at least one CSI-RS.

[0226] Optionally, at least one second reference signal has a QCL relationship with the third beam.

[0227] Optionally, the direction of the third beam includes the direction of the beam that transmits at least one second reference signal.

[0228] Optionally, the third beam is an SSB beam. The third beam is the SSB beam of the control channel or data channel before the first network device receives the first indication information.

[0229] Optionally, if the third beam is an SSB beam, the first network device can transmit at least one CSI-RS through at least one sub-beam corresponding to the third beam, and the terminal device can measure at least one CSI-RS and determine the sub-beam corresponding to the CSI-RS with the higher or highest RSRP as the fourth beam.

[0230] Optionally, at least one second reference signal has an indirect QCL relationship with the third beam.

[0231] Optionally, the third beam is a CSI-RS beam. The fact that at least one second reference signal has an indirect QCL relationship with the CSI-RS beam can be understood as: at least one second reference signal has a QCL relationship with the SSB beam corresponding to the CSI-RS beam. The third beam is the CSI-RS beam of the control channel or data channel before the first network device receives the first indication information.

[0232] Optionally, if the third beam is a CSI-RS beam, the first network device can transmit at least one CSI-RS through at least one sub-beam corresponding to the SSB beam corresponding to the third beam, and the terminal device can measure at least one CSI-RS and determine the sub-beam corresponding to the CSI-RS with the higher or highest RSRP as the fourth beam.

[0233] S1103, the terminal device sends the sixth indication information, the first network device receives the sixth indication information, the sixth indication information indicates the fourth beam, the fourth beam is obtained by the terminal device by measuring at least one second reference signal.

[0234] Optionally, the sixth indication information can be the third index, which indicates the fourth beam.

[0235] Optionally, the fourth beam can be a thin beam or a narrow beam.

[0236] Optionally, the fourth beam can be a CSI-RS beam.

[0237] S1104, at the fourth moment, the first network device sends the second configuration information, and the terminal device receives the second configuration information. The second configuration information indicates that the transmission beam of the control channel or data channel is the fourth beam.

[0238] Optionally, the second configuration information indicating that the transmission beam of the control channel or data channel is the fourth beam can be replaced with: the second configuration information indicating the transmission beam of the control channel or data channel; or it can also be replaced with: the second configuration information indicating that the transmission beam of the first network device is the fourth beam.

[0239] Optionally, the control channel can be a downlink control channel, meaning the first network device can send signaling to the downlink control channel via the fourth beam. Optionally, the control channel can be a downlink data channel, meaning the first network device can send data to the downlink data channel via the fourth beam.

[0240] Optionally, the fourth beam can also be a receive beam for a data channel or a control channel. Optionally, the data channel can be an uplink data channel, meaning the first network device can receive data from the uplink data channel through the fourth beam. Optionally, the control channel can be an uplink control channel, meaning the first network device can receive signaling from the uplink control channel through the fourth beam.

[0241] Optionally, after S1104, the first network device can send signaling to the control channel or data to the data channel via the fourth beam.

[0242] Optionally, S1104 describes a scenario where the first network device sends second configuration information at a fourth time, and the terminal device receives the second configuration information at the fourth time. In some possible embodiments, at the fourth time, the first network device sends data or signaling through a fourth beam, and at the fourth time, the terminal device receives the data or signaling sent by the first network device through the fourth beam. Before the first network device sends data or signaling through the fourth beam, the first network device may send the second configuration information, and the terminal device may receive the second configuration information. Thus, at the fourth time, the first network device can send data or signaling through the fourth beam according to the second configuration information, and at the fourth time, the terminal device can receive the data or signaling sent by the first network device through the fourth beam according to the second configuration information. That is to say, the embodiments described above regarding receiving the second configuration information at the fourth time can also be applied to receiving the data or signaling sent by the first network device through the fourth beam at the fourth time; however, to avoid redundancy, a detailed description is omitted.

[0243] In the above method 1100, the terminal device can determine the fourth beam in advance before the fourth moment, which can reduce the time delay. Figure 4 The fourth beam used after leaving the obstruction can be measured before leaving the obstruction, avoiding the time delay caused by the first network device and the terminal device needing a long time to pair beams after the terminal device leaves the obstruction, thereby improving transmission performance.

[0244] The above method embodiments describe that, as the terminal device moves, the beam of the first network device paired with the terminal device may change due to scenarios such as obstruction and / or leaving the obstruction. In some embodiments, as the terminal device moves, the network device serving the terminal device may change, for example, such as... Figure 5In the scenario shown, the process of a terminal device switching from the second network device to the first network device results in a relatively long latency. The following section will discuss this further. Figure 12 Method 1200 is described as shown. Figure 5 A method for transmitting information in the scenario shown. Method 1200 includes:

[0245] S1201, the terminal device sends first indication information to the second network device, and the second network device receives the first indication information from the terminal device. The first indication information is used to indicate the first beam.

[0246] Optionally, the first indication information is used to indicate the first beam and the first time. Optionally, the first time is a future time, and the first network device can determine the first beam as the beam of the future first time based on the first time indicated by the first indication information.

[0247] Optionally, in the scenario of switching network devices, the first moment can be the moment when the terminal device leaves the coverage area of ​​the second network device and enters the coverage area of ​​the first network device, for example, in Figure 5 In the scenario shown, the first moment is t14. Optionally, the terminal device can predict the first location where the terminal device leaves the coverage area of ​​the second network device and enters the coverage area of ​​the first network device, and the terminal device can predict the time when the terminal device will arrive at the first location in the future based on the current location of the terminal device, the speed of the terminal device, and the current moment, which is the first moment.

[0248] Optionally, the first indication information is used to indicate the first beam and to indicate that the first beam is a future beam. Optionally, the first indication information is used to indicate the first beam and to indicate that the first beam is the SSB beam that the first network device will pair with the terminal device in the future.

[0249] Optionally, "first moment" can be replaced with "first time period". The first indication information can indicate the first time period. Optionally, the first indication information can indicate the first time period by indicating the start time of the first time period, and the length of the first time period can be a preset length. That is, if the first indication information indicates the first moment, it can also be understood as the first indication information indicating the first time period.

[0250] Optionally, when the terminal device executes S1201, the terminal device is at its current location, and the first indication information can indicate the first beam and the first position. Optionally, the first position is the future location of the terminal device. The first network device can obtain the real-time position of the terminal device. Since the first position is different from the current position, the first network device can determine the first beam as the future beam based on the first position indicated by the first indication information.

[0251] Optionally, the terminal device can determine the first moment based on its current position, current time, movement speed, and first position. Alternatively, the terminal device can determine the first moment when it moves to the first position based on the distance between the first position and its current position, the distance, the current time, and its movement speed.

[0252] Optionally, the first beam is a wide beam, a thick beam, or an SSB beam.

[0253] Optionally, if the first indication information indicates the first beam, the first indication information may be a first index, and the first index may uniquely indicate the first beam.

[0254] The method by which the terminal device determines the first beam is the same as the method by which the first beam is determined in S701. To avoid redundancy, this embodiment of the application will not describe it again.

[0255] Optionally, the second network device can be a network device serving the terminal device.

[0256] Optionally, the terminal device can also determine the network device it accesses based on the network device accessed by other terminal devices when they move to the first position. For example, if other terminal devices move to the first position and access the first network device, then the terminal device determines that the network device it accesses when it moves to the first position is also the first network device. After determining the first network device, the terminal device can indicate the identifier of the first network device to the second network device, so that the second network device can execute S1202.

[0257] Optionally, S1201 includes: the terminal device sending first indication information to the first network device via PUSCH, and the first network device receiving the first indication information via PUSCH.

[0258] Optionally, the first network device configures the terminal device with periodic resources for reporting the tracking CSI-RS beam. S1201 includes: the terminal device can send first indication information to the first network device on the resources for reporting the tracking CSI-RS, and the first network device receives the first indication information on the configured periodic resources for reporting the tracking CSI-RS beam.

[0259] Optionally, S1201 includes: the terminal device sending first indication information to the first network device via PUCCH, and the first network device receiving the first indication information via PUCCH. Specifically, the first network device may send a DCI to the terminal device, the DCI may indicate the resource on which the first indication information is sent, the terminal device sends the first indication information to the first network device on the resource indicated by the DCI, and the first network device receives the first indication information on the resource indicated by the DCI.

[0260] S1202, the second network device sends a first instruction message to the first network device.

[0261] Optionally, the second network device may send a first instruction message to the first network device based on the identifier of the first network device.

[0262] S1203, the first network device sends a second instruction information to the second network device, the second network device receives the second instruction information from the first network device, and the second instruction information instructs the terminal device to measure at least one first reference signal.

[0263] The second indication information in S1203 and at least one first reference signal can be found in the description of S702.

[0264] S1204, the second network device sends a second instruction message to the terminal device.

[0265] S1205, the terminal device sends a third indication information to the second network device, and the second network device receives the third indication information. The third indication information is used to indicate the second beam, which is obtained by the terminal device by measuring at least one first reference signal.

[0266] For a description of the third instruction information, please refer to the description in S703. To avoid redundancy, a detailed description will not be provided.

[0267] S1206, the second network device sends a third instruction message to the first network device, and the first network device receives the third instruction message.

[0268] S1207, at the second moment, the first network device sends first configuration information to the terminal device through the second network device, and at the second moment, the terminal device receives the first configuration information through the second network device. The first configuration information indicates that the transmission beam of the control channel or data channel is the second beam.

[0269] For the description of S1207, please refer to the description of S704.

[0270] Optionally, the second network device may also determine the second time based on the first time and send an instruction to the first network device at the second time to instruct the first network device to send the first configuration information.

[0271] The descriptions of the second time step and the first time step are as described in method 700. The first network device can obtain the second time step based on the first time step.

[0272] In the above method 1200, before the terminal device moves from the coverage area of ​​the second network device to the coverage area of ​​the first network device, the terminal device can send a first indication information to the second network device in advance, indicating the first beam and the first time, to avoid the terminal device moving to the overlap area of ​​the coverage areas of the second network device and the first network device and then scanning the SSB beam, which would cause a long delay. For example, in Figure 5 In the scenario shown, the first time point can be t4. The terminal device can determine the SSB beam before time point t14 and the corresponding CSI-RS beam after time point t14. That is, the terminal device needs to determine the SSB beam paired with the first network device and the corresponding CSI-RS beam after it moves into the coverage area of ​​the first network device before moving into that coverage area. This helps save latency, for example, saving the latency between time point t14 and time point t15. Alternatively, the terminal device needs to determine the SSB beam paired with the first network device after it moves into the coverage area before moving into the coverage area of ​​the first network device, and then determine the corresponding CSI-RS beam after moving into the coverage area. This also helps save the latency of determining the SSB beam. Since the terminal device takes a relatively long time to scan the SSB beam, the period between time point t14 and time point t15 is mostly the time for the terminal device to determine the SSB beam. Once the terminal device enters the coverage area of ​​the first network device, it can save latency. Figure 5 This refers to most of the time between time t14 and time t15.

[0273] It should be noted that in the embodiments of this application, the first beam, the second beam, the third beam, the fourth beam, the fifth beam, the sixth beam, the seventh beam, the SSB beam, and the CSI-RS beam are all the transmitting beams or receiving beams of the first network device.

[0274] It should be noted that, in the embodiments of this application Figures 2-5 The application scenarios shown are just some examples. The embodiments of this application can also be applied to other scenarios, but will not be described in detail to avoid redundancy.

[0275] It should also be noted that the embodiments of this application only use CSI-RS as an example of at least one first reference signal or at least one second reference signal. At least one first reference signal or at least one second reference signal can also be other reference signals, such as DMRS, cell reference signal (CRS), or positioning reference signal (PRS).

[0276] It is understood that the execution order of the above method embodiments is not limited by the numbering. The execution order can be determined according to the internal logic. As long as there is no contradiction, the execution order of the methods can be changed.

[0277] It is understood that the above method embodiments can be independent embodiments or embodiments that can be combined with each other. Steps in different method embodiments can be combined with each other to form other embodiments, and steps in the same method embodiment can also be combined with each other to form other embodiments.

[0278] It is understood that the methods and operations implemented by the terminal device in the above method embodiments can also be implemented by components (e.g., chips or circuits) that can be used in the terminal device, the methods and operations implemented by the first network device in the above method embodiments can also be implemented by components (e.g., chips or circuits) that can be used in the first network device, and the methods and operations implemented by the second network device in the above method embodiments can also be implemented by components (e.g., chips or circuits) that can be used in the second network device.

[0279] The method embodiments provided in this application have been described above. The apparatus embodiments provided in this application will be described below. It should be understood that the description of the apparatus embodiments corresponds to the description of the method embodiments. Therefore, any content not described in detail can be referred to the method embodiments above. For the sake of brevity, it will not be repeated here.

[0280] Figure 13 A communication device 1300 provided in an embodiment of this application is shown. The communication device 1300 includes a processor 1310 and a transceiver 1320. The processor 1310 and the transceiver 1320 communicate with each other through an internal connection path. The processor 1310 is used to execute instructions to control the transceiver 1320 to send and / or receive signals.

[0281] Optionally, the communication device 1300 may further include a memory 1330, which communicates with the processor 1310 and the transceiver 1320 via an internal connection path. The memory 1330 stores instructions, and the processor 1310 can execute the instructions stored in the memory 1330. In one possible implementation, the communication device 1300 is used to implement the various processes and steps corresponding to the terminal device in the above method embodiments. In another possible implementation, the communication device 1300 is used to implement the various processes and steps corresponding to the first network device in the above method embodiments. In yet another possible implementation, the communication device 1300 is used to implement the various processes and steps corresponding to the second network device in the above method embodiments.

[0282] It should be understood that the communication device 1300 may specifically be the terminal device, the first network device, or the second network device in the above embodiments, or it may be a chip or a chip system. Correspondingly, the transceiver 1320 may be the transceiver circuit of the chip, which is not limited here. Specifically, the communication device 1300 may be used to execute the various steps and / or processes corresponding to the terminal device, the first network device, or the second network device in the above method embodiments. Optionally, the memory 1330 may include read-only memory and random access memory, and provide instructions and data to the processor. A portion of the memory may also include non-volatile random access memory. For example, the memory may also store device type information. The processor 1310 may be used to execute the instructions stored in the memory, and when the processor 1310 executes the instructions stored in the memory, the processor 1310 is used to execute the various steps and / or processes of the above method embodiments corresponding to the terminal device, the first network device, or the second network device.

[0283] In implementation, each step of the above method can be completed by integrated logic circuits in the processor's hardware or by instructions in software. The steps of the method disclosed in the embodiments of this application can be directly implemented by a hardware processor, or by a combination of hardware and software modules in the processor. The software modules can reside in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the art. This storage medium is located in memory, and the processor reads information from the memory and, in conjunction with its hardware, completes the steps of the above method. To avoid repetition, detailed descriptions are omitted here.

[0284] It should be noted that the processor in the embodiments of this application can be an integrated circuit chip with signal processing capabilities. During implementation, each step of the above method embodiments can be completed by the integrated logic circuitry in the processor's hardware or by instructions in software form. The processor can be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. It can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of this application. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of this application can be directly embodied as being executed by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software modules can be located in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the art. This storage medium is located in memory, and the processor reads the information in the memory and, in conjunction with its hardware, completes the steps of the above methods.

[0285] It is understood that the memory in the embodiments of this application can be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. The non-volatile memory can be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. The volatile memory can be random access memory (RAM), which is used as an external cache. By way of example, but not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous linked dynamic random access memory (SLDRAM), and direct rambus RAM (DR RAM). It should be noted that the memory used in the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0286] According to the method provided in the embodiments of this application, this application also provides a computer program product, which includes: computer program code, which, when run on a computer, causes the computer to execute the various steps or processes executed by the terminal device, the first network device, or the second network device in the above method embodiments.

[0287] According to the method provided in the embodiments of this application, this application also provides a computer-readable storage medium storing program code. When the program code is run on a computer, it causes the computer to execute the various steps or processes executed by the terminal device, the first network device, or the second network device in the above method embodiments.

[0288] According to the method provided in the embodiments of this application, this application also provides a communication system, which includes one or more terminal devices, one or more first network devices, and one or more second network devices as described above.

[0289] The various device embodiments and method embodiments described above correspond completely, with corresponding modules or units performing corresponding steps. For example, the communication unit (transceiver) performs the receiving or sending steps in the method embodiment, while other steps besides sending and receiving can be performed by the processing unit (processor). The function of a specific unit can be based on the corresponding method embodiment. There can be one or more processors.

[0290] In this application, "instruction" can include direct and indirect instructions, as well as explicit and implicit instructions. The information indicated by a given piece of information is called the information to be instructed. In the specific implementation process, there are many ways to instruct the information to be instructed, such as, but not limited to, directly instructing the information to be instructed, such as instructing the information to be instructed itself or its index. It can also indirectly instruct the information to be instructed by instructing other information, where there is a relationship between the other information and the information to be instructed. It can also instruct only a part of the information to be instructed, while the other parts are known or pre-agreed upon. For example, the instruction of specific information can be achieved by using a pre-agreed (e.g., protocol-defined) arrangement of various pieces of information, thereby reducing instruction overhead to some extent.

[0291] In the embodiments of this application, the terms and English abbreviations are exemplary examples given for ease of description and should not be construed as limiting the application in any way. This application does not preclude the possibility of defining other terms that can achieve the same or similar functions in existing or future agreements.

[0292] Those skilled in the art will recognize that the various illustrative logical blocks and steps described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this application.

[0293] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be based on the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0294] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0295] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0296] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0297] In the above embodiments, the functions of each functional unit can be implemented entirely or partially through software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented entirely or partially in the form of a computer program product. The computer program product includes one or more computer instructions (programs). When the computer program instructions (programs) are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that integrates one or more available media. The available media may be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., DVDs), or semiconductor media (e.g., solid-state disks, SSDs), etc.

[0298] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0299] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A method for transmitting information, the method being applicable to terminal devices, characterized in that, include: Send first indication information, the first indication information being used to indicate a first beam and that the first beam is a beam at a future first moment; Receive second indication information, the second indication information being used to instruct the terminal device to measure at least one first reference signal, the at least one first reference signal having a quasi-co-located (QCL) relationship with the first beam; Send a third indication message, the third indication message being used to indicate a second beam, the second beam being obtained by the terminal device from measuring the at least one first reference signal; At a second time, first configuration information is received, which indicates that the transmission beam of the control channel or data channel is the second beam. The second time is not earlier than the first time and is obtained based on the first time.

2. The method according to claim 1, characterized in that, The second indication information is used to instruct the terminal device to measure at least one first reference signal at a third time. The third time is no later than the first time.

3. The method according to claim 1, characterized in that, The second indication information is used to instruct the terminal device to measure at least one first reference signal at a third time. The third time point is no earlier than the first time point.

4. The method according to any one of claims 1 to 3, characterized in that, Between the first time point and the second time point, the transmission beam of the control channel or the data channel is the first beam.

5. The method according to any one of claims 1 to 3, characterized in that, The difference between the second time point and the first time point is less than a preset value.

6. The method according to any one of claims 1 to 3, characterized in that, The method further includes: Send a fourth indication message, which is used to indicate a fourth time point; The terminal device receives a fifth indication message, which is used to instruct the terminal device to measure at least one second reference signal. The at least one second reference signal has a QCL relationship or an indirect QCL relationship with a third beam. The third beam is the transmission beam of the control channel or the data channel before the first indication message is sent. Send a sixth indication message, the sixth indication message being used to indicate a fourth beam, the fourth beam being obtained by the terminal device from measuring the at least one second reference signal; At the fourth moment, second configuration information is received, which indicates that the transmission beam of the control channel or the data channel is the fourth beam.

7. The method according to any one of claims 1 to 3, characterized in that, The method further includes: A fourth indication message is sent, which is used to indicate a fourth time. After the fourth time, the transmission beam of the control channel or the data channel is a third beam, which is the transmission beam of the control channel or the data channel before the first indication message was sent.

8. A method for transmitting information, the method being applicable to a first network device, characterized in that, include: Receive first indication information, the first indication information being used to indicate a first beam and that the first beam is a beam at a future first moment; Send a second instruction message, the second instruction message being used to instruct the terminal device to measure at least one first reference signal, the at least one first reference signal having a quasi-co-located (QCL) relationship with the first beam; Receive third indication information, the third indication information being used to indicate a second beam, the second beam being obtained by the terminal device from measuring the at least one first reference signal; At a second time, first configuration information is sent, which indicates that the transmission beam of the control channel or data channel is the second beam. The second time is no earlier than the first time and is obtained based on the first time.

9. The method according to claim 8, characterized in that, The second indication information is used to instruct the terminal device to measure at least one first reference signal at a third time. The third moment is earlier than the first moment.

10. The method according to claim 8, characterized in that, The second indication information is used to instruct the terminal device to measure the at least one first reference signal at a third time. The third moment is later than the first moment.

11. The method according to any one of claims 8 to 10, characterized in that, Between the first time point and the second time point, the transmission beam of the control channel or the data channel is the first beam.

12. The method according to any one of claims 8 to 10, characterized in that, The difference between the second time point and the first time point is less than a preset value.

13. The method according to any one of claims 8 to 10, characterized in that, The method further includes: Receive fourth indication information, which is used to indicate a fourth time. Send a fifth indication message, the fifth indication message being used to instruct the terminal device to measure at least one second reference signal, the at least one second reference signal having a quasi-co-located QCL relationship or an indirect QCL relationship with a third beam, the third beam being the transmission beam of the control channel or the data channel before receiving the first indication message; The terminal device receives a sixth indication message, which is used to indicate a fourth beam, the fourth beam being obtained by measuring the at least one second reference signal. At the fourth moment, second configuration information is sent, which indicates that the transmission beam of the control channel or the data channel is the fourth beam.

14. The method according to any one of claims 8 to 10, characterized in that, The transmission also includes: A fourth indication message is sent, which is used to indicate a fourth time. After the fourth time, the transmission beam of the control channel or the data channel is a third beam, which is the transmission beam of the control channel or the data channel before receiving the first indication message.

15. A communication device, characterized in that, The device includes a processor and a memory, the processor being coupled to the memory for storing computer programs or instructions, and the processor for executing the computer programs or instructions in the memory such that the method of any one of claims 1 to 14 is performed.

16. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores program code that, when executed on a computer, causes the computer to perform the method as described in any one of claims 1 to 14.

17. A computer program product, characterized in that, The computer program product includes computer program code that, when run on a computer, causes the computer to perform the method as described in any one of claims 1 to 14.

18. A chip, characterized in that, Includes a processor for reading and executing a computer program stored in a memory to implement the method as described in any one of claims 1 to 14.

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