Time-frequency offset synchronization method, electronic device, storage medium and program product

Abstract

This application provides a time-frequency offset synchronization method, electronic device, storage medium, and program product. The method includes: a base station sending multiple sets of time-frequency offset measurement information to a terminal device, each set of time-frequency offset measurement information being used by the terminal device to perform time-frequency offset measurement on a TRP; when it is determined that the terminal device has entered the overlap area of ​​multiple TRPs, sending first indication information to the terminal device, the first indication information being used to instruct the terminal device to perform time-frequency offset measurement on the multiple TRPs; when it is determined that the terminal device has switched to a first TRP among the multiple TRPs, sending second indication information to the terminal device, the second indication information being used to instruct the terminal device to use the time-frequency offset measurement result of the first TRP. Therefore, when the terminal device switches to a certain TRP, the base station can directly instruct the terminal device to use the previous time-frequency offset measurement result for that TRP, thereby ensuring the data transmission performance of the terminal device.

Description

Technical Field

[0001] This application relates to the field of communication technology, and in particular to a time-frequency offset synchronization method, electronic device, storage medium, and program product. Background Technology

[0002] In scenarios where terminal devices move at high speeds, the logical cell where the base station is located typically contains multiple Transmission Reception Points (TRPs). Multiple TRPs can transmit data with the terminal devices simultaneously, ensuring the service continuity of the terminal devices in mobile scenarios.

[0003] In related technologies, multiple Transmission Points (TRPs) can employ various transmission techniques when transmitting data with a terminal device, such as Dynamic Point Selection (DPS) and Joint Transmission (JT). In the DPS transmission scheme, the base station can select the TRP with the best channel quality based on the Channel Quality Indicator (CQI) data from multiple TRPs fed back by the terminal device. Under the current DPS strategy, the terminal device can switch from one TRP to another. In this case, the base station needs to reactivate the terminal device's time-frequency offset measurement, and the terminal device also needs to re-perform the time-frequency offset measurement, thus affecting the data transmission performance of the terminal device. Summary of the Invention

[0004] This application provides a time-frequency offset synchronization method, electronic device, storage medium, and program product to solve the problem that data transmission performance is affected when terminal devices perform TRP switching.

[0005] To solve the above-mentioned technical problems, this application is implemented as follows:

[0006] Firstly, a time-frequency offset synchronization method is provided, applied to a base station, including:

[0007] Multiple sets of time-frequency offset measurement information are sent to the terminal device. Each set of time-frequency offset measurement information is used by the terminal device to perform time-frequency offset measurement on a Transmitter Receiving Point (TRP).

[0008] If it is determined that the terminal device has entered the overlapping area of ​​multiple TRPs, a first indication message is sent to the terminal device, the first indication message being used to instruct the terminal device to perform time-frequency offset measurement on the multiple TRPs;

[0009] If it is determined that the terminal device switches to the first TRP among the plurality of TRPs, a second indication message is sent to the terminal device, the second indication message being used to instruct the terminal device to use the time-frequency offset measurement result of the first TRP.

[0010] Secondly, a time-frequency offset synchronization method is provided, applied to terminal devices, including:

[0011] The terminal device receives multiple sets of time-frequency offset measurement information sent by the base station, and each set of time-frequency offset measurement information is used by the terminal device to perform time-frequency offset measurement on a TRP.

[0012] The terminal device receives a first indication message sent by the base station. The first indication message is sent by the base station when it determines that the terminal device has entered the overlapping area of ​​multiple TRPs. The first indication message is used to instruct the terminal device to perform time-frequency offset measurement on the multiple TRPs.

[0013] Based on the first indication information and the time-frequency offset measurement information of the plurality of TRPs, time-frequency offset measurement is performed on the plurality of TRPs to obtain the time-frequency offset measurement result;

[0014] The terminal device receives a second indication message sent by the base station. The second indication message is sent by the base station when it determines that the terminal device has switched to the first TRP among the plurality of TRPs. The second indication message is used to instruct the terminal device to use the time-frequency offset measurement result of the first TRP for channel demodulation.

[0015] Based on the second instruction information, the time-frequency offset measurement results of the first TRP are used.

[0016] Thirdly, an electronic device is provided, comprising:

[0017] processor;

[0018] Memory used to store the processor's executable instructions;

[0019] The processor is configured to execute the instructions to implement the method as described in the first or second aspect.

[0020] Fourthly, a computer-readable storage medium is provided, wherein when instructions in the storage medium are executed by a processor of an electronic device, the electronic device is enabled to perform the method as described in the first or second aspect.

[0021] Fifthly, a computer program product is provided, the computer program product including a non-transitory computer-readable storage medium storing a computer program operable to cause a computer to perform some or all of the steps of the method as described in the first aspect, or to perform some or all of the steps of the method as described in the second aspect.

[0022] In this embodiment, since the base station can pre-deploy information for time-frequency offset measurement and pre-activate the terminal device to perform time-frequency offset measurements on multiple TRPs in the TRP overlap area when the terminal device enters the TRP overlap area, the base station can directly instruct the terminal device to use the previous time-frequency offset measurement results for that TRP when the terminal device switches to a certain TRP in the TRP overlap area. This can ensure the data transmission performance of the terminal device, improve downlink spectrum efficiency and downlink traffic, and enhance the user experience. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram illustrating how multiple TRPs transmit data with a terminal device using a DPS, as described in one embodiment of this application.

[0025] Figure 2 This is a flowchart illustrating a time-frequency offset synchronization method according to an embodiment of this application;

[0026] Figure 3 This is a schematic diagram illustrating the specific format of an embodiment of MAC CE in this application;

[0027] Figure 4 This is a flowchart illustrating a time-frequency offset synchronization method according to an embodiment of this application;

[0028] Figure 5 This is a schematic diagram of an embodiment of this application showing multiple TRPs sending TRS to a terminal device;

[0029] Figure 6 This is a schematic diagram of the QCL types and QCL relationships configured for multiple TRPs in one embodiment of this application;

[0030] Figure 7 This is a schematic diagram of the frequency offset measurement and usage results when the base station instructs the terminal device to activate, according to an embodiment of this application.

[0031] Figure 8 This is a schematic diagram illustrating the specific format of an embodiment of MAC CE in this application;

[0032] Figure 9 This is a schematic diagram of the structure of an electronic device according to an embodiment of this application;

[0033] Figure 10 This is a schematic diagram of the structure of a time-frequency offset synchronization device according to an embodiment of this application;

[0034] Figure 11 This is a schematic diagram of the structure of a time-frequency offset synchronization device according to an embodiment of this application. Detailed Implementation

[0035] In scenarios where terminal devices move at high speeds, the logical cell where the base station is located typically contains multiple TRPs (Transmission Points), and these multiple TRPs can use DSP (Digital Subsystem for Components) transmission technology to transmit data with the terminal devices. For example... Figure 1 As shown. Figure 1 In the process, when TRP1 and TRP2 use DSP transmission technology to transmit data with the terminal equipment, they can send Channel State Information Reference Signal (CSI-RS) to the terminal equipment. Figure 1 As shown in CSI-RS1 and CSI-RS2, the terminal device can measure the channel quality of TRP1 according to CSI-RS1 and the channel quality of TRP2 according to CSI-RS2, and report the measurement results to the base station. Assuming that the channel quality of TRP2 is higher than that of TRP1, the base station can choose TRP2 to transmit data with the terminal device. For example, TRP2 can send a Physical Downlink Shared Channel (PDSCH)2 to the terminal device, and the terminal device can demodulate the channel of PDSCH2 to realize data transmission with TRP2.

[0036] In practical applications, when terminal devices move at high speeds, a time-frequency offset often exists between them and the TRP (Telecommunications Provider Address). To improve the data transmission performance of the terminal device, it typically needs to perform time-frequency offset measurement before transmitting data with the TRP. The terminal device then uses the measurement results for time-frequency offset synchronization or channel demodulation. Under the current DPS (Distributed Power Grid System) policy, when a terminal device switches from one TRP to another, the base station needs to reactivate the terminal device's time-frequency offset measurement, and the terminal device also needs to perform the measurement again. However, during the time-frequency offset measurement, since the offset is unknown, the terminal device cannot use the measurement results to transmit data with the TRP, thus affecting its data transmission performance.

[0037] This application provides a time-frequency offset synchronization method, electronic device, storage medium, and program product. In scenarios where terminal devices move at high speeds, the base station can send information for time-frequency offset measurement to the terminal device in advance. When the terminal device enters the TRP overlap area, it can activate the terminal device to perform time-frequency offset measurements on multiple TRPs in the TRP overlap area in advance. Thus, when the terminal device switches to a certain TRP in the TRP overlap area, the base station can directly instruct the terminal device to use the previous time-frequency offset measurement results for that TRP without activating the terminal device's time-frequency offset measurement. Consequently, the terminal device does not need to perform time-frequency offset measurement, thereby ensuring the data transmission performance of the terminal device in the TRP overlap area, thereby improving downlink spectral efficiency and downlink traffic, and enhancing the user experience.

[0038] It should be noted that, in this embodiment, the scenario of high-speed movement of the terminal device can be a user riding a high-speed train, in which the user's terminal device moves at high speed. Of course, the scenario of high-speed movement of the terminal device can also be other scenarios, which will not be listed here.

[0039] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in this application will be clearly and completely described below with reference to the accompanying drawings of one or more embodiments. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this application.

[0040] The terms "first," "second," etc., used in this application and the claims are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that this application can be implemented in orders other than those illustrated or described herein. Furthermore, in this application and the claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0041] The technical solutions provided by the various embodiments of this application are described in detail below with reference to the accompanying drawings.

[0042] Figure 1 This is a flowchart illustrating a time-frequency offset synchronization method according to an embodiment of this application. Figure 1 The time-frequency offset synchronization method shown can be executed by the base station, and may specifically include the following steps.

[0043] S202: Send multiple sets of time-frequency offset measurement information to the terminal device. Each set of time-frequency offset measurement information is used by the terminal device to perform time-frequency offset measurement on a Transmission Receiving Point (TRP).

[0044] In scenarios where terminal devices move at high speeds, the logical cell where the base station is located can include multiple Transmission Reception Points (TRPs). In order to obtain time-frequency offset measurements of different TRPs, the base station can send multiple sets of time-frequency offset measurement information to the terminal device. Each set of time-frequency offset measurement information corresponds to a TRP, which is used by the terminal device to perform time-frequency offset measurements on this TRP.

[0045] In this embodiment, the base station sends multiple sets of time-frequency offset measurement information to the terminal device before the terminal device enters the TRP overlap area. For example, the base station can obtain the location information of the terminal device, and when it determines that the terminal device has entered the coverage area of ​​a certain TRP among multiple TRPs based on the location information, it sends multiple sets of time-frequency offset measurement information to the terminal device. Of course, the base station can also send multiple sets of time-frequency offset measurement information to the terminal device at other times before the terminal device enters the TRP overlap area; no specific limitation is made here.

[0046] Multiple sets of time-frequency offset measurement information can include multiple sets of reference signals and the measurement configuration of each set of reference signals; that is, each set of time-frequency offset measurement information can include a set of reference signals and the measurement configuration of that set of reference signals.

[0047] The reference signal can be a signal used by the terminal device to measure the frequency offset. In some implementations, the reference signal can be a tracking reference signal (TRS) or other reference signals; no specific limitation is made here. The reference signals transmitted by different TRPs can be the same or different.

[0048] The measurement configuration of the reference signal can be configuration information related to time-frequency offset measurement, which can be used to instruct the terminal device on the specific measurement content when performing time-frequency offset measurement. In some embodiments, the measurement configuration of the reference signal may include a quasi-co-location (QCL) type, which can be any of type A, type B, type C, and type D. The QCL types included in the measurement configurations of different reference signals may be the same or different. The characteristics of type A, type B, type C, and type D among the QCL types are shown in Table 1.

[0049] Table 1

[0050] QCL type characteristic typeA Doppler shift, Doppler spread, average time delay, time delay spread typeB Doppler shift, Doppler spread typeC Doppler shift, average time delay typeD Space reception parameters

[0051] When multiple sets of time-frequency offset measurement information include multiple sets of reference signals and measurement configurations for each set of reference signals, the base station may send multiple sets of time-frequency offset measurement information to the terminal device by including the following steps:

[0052] Multiple sets of reference signals are sent to the terminal device via the physical downlink channel;

[0053] The measurement configuration for each set of reference signals is sent to the terminal equipment via Radio Resource Control (RRC) signaling.

[0054] The physical downlink channel can be, for example, the Physical Downlink Control Channel (PDCCH), etc., without specific limitations here. When a base station transmits multiple sets of reference signals through the physical downlink channel, in some implementations, each TRP can transmit its own reference signal to the terminal device separately through the physical downlink channel. Optionally, to avoid mutual interference between the reference signals of different TRPs, the reference signals transmitted by different TRPs can be staggered in the time-frequency domain.

[0055] S204: When it is determined that the terminal device has entered the overlapping area of ​​multiple TRPs, a first indication message is sent to the terminal device. The first indication message is used to instruct the terminal device to perform time-frequency offset measurement on the multiple TRPs.

[0056] After sending multiple sets of time-frequency offset measurement information to the terminal device, the base station can determine whether the terminal device has entered the overlapping area of ​​multiple TRPs. If it is determined that the terminal device has entered the overlapping area of ​​multiple TRPs, the base station can send a first indication information to the terminal device. The first indication information instructs the terminal device to perform time-frequency offset measurement on the multiple TRPs. In other words, the first indication information activates the terminal device to perform time-frequency offset measurement on the multiple TRPs.

[0057] There are several ways a base station can determine whether a terminal device has entered the overlapping area of ​​multiple TRPs, and we will not limit the specific methods here. For example, the base station can obtain the location information of the terminal device (or the terminal device can actively report its own location information), and determine whether the terminal device has entered the overlapping area of ​​multiple TRPs based on the location information of the terminal device and the coverage area of ​​multiple TRPs. Alternatively, the terminal device can also report the measurement results of the channel quality of each TRP, and the base station can determine whether the terminal device has entered the overlapping area of ​​multiple TRPs based on the measurement results.

[0058] The number of TRPs can be two or more, depending on the specific application scenario, and no specific limit is set here. For example, in the scenario where users are taking high-speed rail, the number of TRPs is generally two, but in special cases, the number of TRPs can be three.

[0059] In this embodiment, the terminal device has capability information for time-frequency offset measurement. This capability information can characterize the number of time-frequency offset measurements (or measurement configurations) supported by the terminal device. In other words, this capability information can characterize that the terminal device can support simultaneous time-frequency offset measurements on several TRPs. Based on this capability information of the terminal device, when the base station instructs the terminal device to perform time-frequency offset measurement through the first indication information, if the time-frequency offset measurement indicated by the base station exceeds the capability of the terminal device, the terminal device will be unable to perform the time-frequency offset measurement on the TRP, or the measurement will fail. In view of this, when the base station instructs the terminal device to perform time-frequency offset measurement through the first indication information, it needs to consider the capability information of the terminal device to avoid the problem of the terminal device being unable to perform time-frequency offset measurement or the measurement failing.

[0060] In some implementations, the base station may include the following steps before sending the first indication information to the terminal device:

[0061] The ability to measure time-frequency deviation sent by the receiving terminal device.

[0062] Thus, the first indication information sent by the base station to the terminal device may include:

[0063] Based on the capability information of the terminal device, a first instruction message is sent to the terminal device, wherein the time-frequency offset measurement indicated by the first instruction message matches the capability information of the terminal device.

[0064] When a terminal device sends time-frequency offset measurement capability information to a base station, it can do so before the base station issues the first indication information. For example, the terminal device can send the time-frequency offset measurement capability information to the base station when it receives multiple sets of time-frequency offset measurement information, or it can send the time-frequency offset measurement capability information to the base station when accessing the base station. No specific time limit is set for when the terminal device sends the capability information.

[0065] After receiving the capability information of the terminal device, the base station can send first indication information to the terminal device based on the capability information. The time-frequency offset measurement indicated by the first indication information matches the capability information of the terminal device. This matching can mean that the number of time-frequency offset measurements indicated by the first indication information is less than or equal to the number of time-frequency offset measurements supported by the terminal device. For example, if the terminal device supports simultaneous time-frequency offset measurements for two TRPs, then the number of time-frequency offset measurements indicated by the first indication information must be less than or equal to two.

[0066] In some implementations, the base station may first send a first indication message to the terminal device. If the time-frequency offset measurement indicated by the first indication message does not match the terminal device's capability information, the terminal device can report its own capability information to the base station. Upon receiving the reported capability information, the base station can retransmit the first indication message. The retransmitted first indication message will then indicate a time-frequency offset measurement that matches the terminal device's capability information, thus avoiding the mismatch between the time-frequency offset measurement indicated by the first indication message and the terminal device's capability information. In practical applications, considering that this scheme requires the base station to send the first indication message twice to the terminal device, to avoid resource waste, it is preferable for the terminal device to report its own capability information first, and then for the base station to send the first indication message based on that capability information.

[0067] It should be noted that in practical applications, the number of multiple TRPs in the overlapping area may be less than or equal to the number of time-frequency offset measurements supported by the terminal device, or it may be greater than the number of time-frequency offset measurements supported by the terminal device. When the number of multiple TRPs in the overlapping area is less than or equal to the number of time-frequency offset measurements supported by the terminal device, the base station can instruct the terminal device to perform time-frequency offset measurements on multiple TRPs by sending a single first indication message. When the number of multiple TRPs in the overlapping area is greater than the number of time-frequency offset measurements supported by the terminal device, in order to ensure that the time-frequency offset measurements indicated by the base station match the capability information of the terminal device, the base station cannot instruct the terminal device to perform time-frequency offset measurements on multiple TRPs by sending a single first indication message. In this case, the base station can choose to send multiple first indication messages to the terminal device. Each first indication message can instruct the terminal device to measure some TRPs, and multiple first indication messages can instruct the terminal device to measure multiple TRPs. For example, the base station can first instruct the terminal device to perform time-frequency offset measurements on several TRPs with the best signal strength (matching the terminal device's capability information) among multiple TRPs, and then instruct the terminal device to measure the remaining TRPs with weaker signal strength. Alternatively, the base station can also instruct the terminal device to perform time-frequency offset measurements on several TRPs (matching the terminal device's capability information) in the same direction as the terminal device's movement, and then instruct the terminal device to measure the remaining TRPs. Here, there is no specific limitation on the order in which the base station instructs the TRP time-frequency offset measurements.

[0068] For example, in a scenario where a user is traveling on a high-speed train, assuming the user's terminal device supports simultaneous time-frequency offset measurements of two TRPs, when the terminal device enters the overlapping area of ​​three TRPs, the base station can send two first indication messages to the terminal device to instruct it to perform time-frequency offset measurements on these three TRPs. The first indication message can instruct the terminal device to perform time-frequency offset measurements on the two TRPs with higher intensity, and the second indication message can instruct it to perform time-frequency offset measurements on the remaining TRP. Alternatively, the first indication message can instruct the terminal device to perform time-frequency offset measurements on one or two TRPs that are moving in the same direction as the terminal device, and the second indication message can instruct it to perform time-frequency offset measurements on the remaining TRP.

[0069] In some implementations, when a base station sends the first indication information to a terminal device, it may include the following steps:

[0070] A Medium Access Control Element (MAC CE) is sent to the terminal device, and the MAC CE carries the first instruction information.

[0071] In other words, the base station can instruct or activate the terminal device to perform time-frequency offset measurements on multiple TRPs via MAC CE. In some implementations, the specific format of the MAC CE can be as follows: Figure 3 As shown. Figure 3 In the diagram, Oct1 is the part that needs to be filled in, used to determine the active cell, BWP ID, and CORESET Pool ID. Oct2 through OctN, each Oct contains 8 bits and is used to determine the active time-frequency offset measurement. The specific number of Octs required is ceil(configured number of Ti / 8). Each Ti can correspond to a TRP. When Ti is 1, it indicates that the i-th set of time-frequency offset measurements is activated, meaning the terminal device is activated to perform time-frequency offset measurements on the TRP corresponding to that Ti. When Ti is 0, it indicates that the i-th set of time-frequency offset measurements is not activated, meaning the terminal device is not activated to perform time-frequency offset measurements on the TRP corresponding to that Ti. Ti can be determined by the QCL relationship configured by the base station.

[0072] S206: When it is determined that the terminal device has switched to the first TRP among multiple TRPs, a second instruction message is sent to the terminal device. The second instruction message is used to instruct the terminal device to use the time-frequency offset measurement result of the first TRP.

[0073] The first TRP is one of multiple TRPs; the term "first" is used to distinguish different TRPs and has no other special meaning. After activating the terminal device to perform time-frequency offset measurements on multiple TRPs, the base station can determine whether the terminal device should switch to a specific TRP. If it is determined that the terminal device has switched to the first TRP, a second indication message can be sent to the terminal device. This second indication message instructs the terminal device to use the previous time-frequency offset measurement results for that first TRP, such as using the time-frequency offset measurement results for time-frequency offset synchronization or channel demodulation. Therefore, when the terminal device performs a TRP switch, since the base station can directly instruct the terminal device to use the previous time-frequency offset measurement results for that TRP, there is no need to activate the terminal device to perform time-frequency offset measurements again. Consequently, the terminal device does not need to perform time-frequency offset measurements again, thus ensuring the data transmission performance of the terminal device, improving downlink spectral efficiency and downlink traffic, and enhancing the user experience.

[0074] In some implementations, the base station sending second indication information to the terminal device may include the following steps:

[0075] Downlink Control Information (DCI) is sent to the terminal device, and the DCI carries a second indication information.

[0076] In other words, the base station can instruct the terminal device to use the time-frequency offset measurement results of the first TRP through DCI.

[0077] In some implementations, the base station can also configure QCL relationships (which can also be represented as QCL link relationships) and distribute the QCL relationships to the terminal devices. Specifically, this may include the following steps:

[0078] Establish the QCL relationship between each set of time-frequency offset measurement information and the physical downlink channel of the corresponding TRP, and obtain multiple QCL relationships corresponding to multiple sets of time-frequency offset measurement information;

[0079] Multiple QCL relationships are sent to the terminal device, and these multiple QCL relationships are used by the terminal device to apply the time-frequency offset measurement results of the first TRP.

[0080] The time-frequency offset measurement information here can be a reference signal used for time-frequency offset measurement, such as TRS. The physical downlink channel corresponding to the TRP can be at least one of the TRP's PDCCH and PDSCH, or other physical downlink channels, without specific limitations here.

[0081] For each reference signal, the base station can establish a QCL relationship between the reference signal and the physical downlink channel of the corresponding TRP. This results in multiple QCL relationships corresponding to multiple reference signals. For example, for TRP1, a QCL relationship can be established between the reference signal of TRP1 and the PDCCH and / or PDSCH of TRP1; for TRP2, a QCL relationship can be established between the reference signal of TRP2 and the PDCCH and / or PDSCH of TRP2, thus obtaining two QCL relationships.

[0082] After establishing multiple QCL relationships, the base station can send these relationships to the terminal device. Upon receiving the multiple QCL relationships, the terminal device can use the measurement results for the first TRP based on these relationships. For example, the terminal device can determine the QCL relationship corresponding to the first TRP from the multiple QCL relationships (which can be represented as the first QCL relationship), and then use the time-frequency offset measurement results for the first TRP based on this first QCL relationship. For instance, assuming the first QCL relationship is the QCL relationship between the reference signal and the PDCCH of the first TRP, the terminal device can use the time-frequency offset measurement results for the first TRP to perform channel demodulation on the PDCCH of the first TRP.

[0083] In some implementations, the base station sends multiple QCL relationships to the terminal device, which may include:

[0084] Send RRC signaling to the terminal device. The RRC signaling carries multiple QCL relationships.

[0085] In other words, the base station can send the established QCL relationship to the terminal device through RRC signaling.

[0086] In this embodiment, since the base station can pre-deploy information for time-frequency offset measurement and pre-activate the terminal device to perform time-frequency offset measurements on multiple TRPs in the TRP overlap area when the terminal device enters the TRP overlap area, the base station can directly instruct the terminal device to use the previous time-frequency offset measurement results for that TRP when the terminal device switches to a certain TRP in the TRP overlap area. This can ensure the data transmission performance of the terminal device, improve downlink spectrum efficiency and downlink traffic, and enhance the user experience.

[0087] Figure 4 This is a flowchart illustrating a time-frequency offset synchronization method according to an embodiment of this application. Figure 4 The time-frequency offset synchronization method shown can be executed by a terminal device, and may specifically include the following steps.

[0088] S402: Receive multiple sets of time-frequency offset measurement information sent by the base station. Each set of time-frequency offset measurement information is used by the terminal equipment to perform time-frequency offset measurement on a TRP.

[0089] In scenarios where terminal devices move at high speeds, the logical cell where the base station is located can include multiple Time-Frequency Offset (TRPs). To obtain time-frequency offset measurements for different TRPs, the base station can send multiple sets of time-frequency offset measurement information to the terminal device, and the terminal device can receive these multiple sets of time-frequency offset measurement information sent by the base station. Each set of time-frequency offset measurement information corresponds to one TRP, which is used by the terminal device to perform time-frequency offset measurements on that specific TRP.

[0090] Multiple sets of time-frequency offset measurement information can include multiple sets of reference signals and the measurement configuration of each set of reference signals; that is, each set of time-frequency offset measurement information can include a set of reference signals and the measurement configuration of that set of reference signals.

[0091] The reference signal can be a signal used by the terminal device to measure the frequency offset. In some implementations, the reference signal can be a TRS or other reference signals; no specific limitation is made here. The reference signals transmitted by different TRPs can be the same or different.

[0092] The measurement configuration of the reference signal can be configuration information related to time-frequency offset measurement, which can be used to instruct the terminal device on the specific measurement content when performing time-frequency offset measurement. In some embodiments, the measurement configuration of the reference signal may include a QCL type, which includes any one of type A, type B, type C, and type D. The QCL types included in the measurement configurations of different reference signals may be the same or different. The characteristics of type A, type B, type C, and type D in the QCL types can be found in Table 1 above, and will not be repeated here.

[0093] When multiple sets of time-frequency offset measurement information include multiple sets of reference signals and the measurement configuration of each reference signal, the terminal device receiving the multiple sets of time-frequency offset measurement information sent by the base station may include the following steps:

[0094] Receive multiple sets of reference signals sent by the base station through the physical downlink channel;

[0095] The measurement configuration for each set of reference signals received from the base station via RRC signaling.

[0096] The physical downlink channel can be, for example, PDCCH, etc., without specific limitations here.

[0097] S404: Receive first indication information sent by the base station. The first indication information is sent by the base station when it determines that the terminal device has entered the overlapping area of ​​multiple TRPs. The first indication information is used to instruct the terminal device to perform time-frequency offset measurement on multiple TRPs.

[0098] After sending multiple sets of time-frequency offset measurement information to the terminal device, if the base station determines that the terminal device has entered the overlapping area of ​​multiple TRPs, it can send a first indication message to the terminal device. This first indication message instructs the terminal device to perform time-frequency offset measurements on the multiple TRPs; in other words, it activates the terminal device's time-frequency offset measurements on the multiple TRPs. The terminal device can receive the first indication message sent by the base station.

[0099] In this embodiment, the terminal device has capability information for time-frequency offset measurement. This capability information can characterize the number of time-frequency offset measurements (or measurement configurations) supported by the terminal device. In other words, this capability information can characterize that the terminal device can support simultaneous time-frequency offset measurements on several TRPs. Based on this capability information of the terminal device, when the base station instructs the terminal device to perform time-frequency offset measurement via first indication information, if the time-frequency offset measurement indicated by the base station exceeds the capability of the terminal device, the terminal device will be unable to perform time-frequency offset measurement on the TRP or the measurement will fail. In view of this, to avoid the problem that the terminal device cannot perform time-frequency offset measurement on the TRP or the measurement fails, the terminal device may include the following steps before receiving the first indication information sent by the base station:

[0100] Send the terminal device's time-frequency offset measurement capability information to the base station.

[0101] The terminal device can send its time-frequency offset measurement capability information to the base station when it receives multiple sets of time-frequency offset measurement information, or it can send the time-frequency offset measurement capability information to the base station when it accesses the base station. No specific time limit is set for the terminal device to send the capability information.

[0102] After receiving the capability information of the terminal device, the base station can send a first indication information to the terminal device according to the capability information. The time-frequency offset measurement indicated by the first indication information matches the capability information of the terminal device. That is, the number of time-frequency offset measurements indicated by the first indication information is less than or equal to the number of time-frequency offset measurements supported by the terminal device. This can avoid the problem that the terminal device cannot perform time-frequency offset measurement of TRP or the measurement fails when the time-frequency offset measurement indicated by the first indication information does not match the capability information of the terminal device.

[0103] It should be noted that in practical applications, the number of multiple TRPs in the overlapping area may be less than or equal to the number of time-frequency offset measurements supported by the terminal device, or it may be greater than the number of time-frequency offset measurements supported by the terminal device. When the number of multiple TRPs in the overlapping area is less than or equal to the number of time-frequency offset measurements supported by the terminal device, the base station can send a first indication message to the terminal device once, and the terminal device can perform time-frequency offset measurements on multiple TRPs based on this first indication message. When the number of multiple TRPs in the overlapping area is greater than the number of time-frequency offset measurements supported by the terminal device, the base station can send multiple first indication messages to the terminal device, and the terminal device can perform time-frequency offset measurements on multiple TRPs based on the multiple sent first indication messages. For details on how the base station can send multiple first indication messages, please refer to [link to relevant documentation]. Figure 2 The corresponding contents in the illustrated embodiments will not be described in detail here.

[0104] In some implementations, the terminal device receiving the first indication information sent by the base station may include the following steps:

[0105] The MAC CE sent by the base station is received, and the MAC CE carries the first indication information.

[0106] In other words, the terminal device can receive the first indication information sent by the base station via MAC CE. The specific format of MAC CE can be as follows: Figure 3 As shown.

[0107] S406: Based on the first instruction information and the time-frequency deviation measurement information of multiple TRPs, perform time-frequency deviation measurement on multiple TRPs to obtain the time-frequency deviation measurement results.

[0108] After receiving the first instruction information, the terminal device can perform time-frequency offset measurements on the multiple TRPs based on the first instruction information and the multiple sets of time-frequency offset measurement information received in S402 for measuring the time-frequency offset of the multiple TRPs, and obtain the time-frequency offset measurement results for the multiple TRPs. The specific implementation method of the terminal device performing the time-frequency offset measurement can be found in related technologies, and will not be described in detail here.

[0109] S408: Receive second indication information sent by the base station. The second indication information is sent by the base station when it determines that the terminal device has switched to the first TRP among multiple TRPs. The second indication information is used to instruct the terminal device to use the time-frequency offset measurement result of the first TRP.

[0110] The first TRP is one of multiple TRPs. The term "first" is used to distinguish different TRPs and has no other special meaning. After the base station activates the terminal device to perform time-frequency offset measurements on multiple TRPs, and determines that the terminal device has switched to the first TRP among the multiple TRPs, it can send a second indication message to the terminal device. The second indication message instructs the terminal device to use the previous time-frequency offset measurement results for that first TRP. The terminal device can receive the second indication message sent by the base station.

[0111] In some implementations, the terminal device receiving the second indication information sent by the base station may include the following steps:

[0112] The DCI sent by the base station is received, and the DCI carries second indication information.

[0113] In other words, the terminal device can receive the second instruction information sent by the base station through DCI.

[0114] S410: Based on the second instruction information, use the time-frequency offset measurement results of the first TRP.

[0115] After receiving the second indication information, the terminal device can use the time-frequency offset measurement results of the first TRP according to the second indication information. For example, it can use the time-frequency offset measurement results of the first TRP for time-frequency offset synchronization or channel demodulation. In this way, since the terminal device can directly use the previous time-frequency offset measurement results of the TRP according to the base station's indication information when performing TRP handover, it does not need to perform time-frequency offset measurement again. Therefore, the data transmission performance of the terminal device can be guaranteed, downlink spectrum efficiency and downlink traffic can be improved, and the user experience can be enhanced.

[0116] In some implementations, the base station can also configure QCL relationships (which can also be represented as QCL link relationships) and distribute the QCL relationships to the terminal device. The terminal device can then use the time-frequency offset measurement results for the first TRP based on the QCL relationships configured by the base station. Specifically, this may include the following steps:

[0117] The receiver receives multiple QCL relationships sent by the base station. Each QCL relationship is a set of time-frequency offset measurement information and the QCL relationship between the physical downlink channel of the corresponding TRP.

[0118] The time-frequency offset measurement results used for the first TRP include:

[0119] The first QCL relationship is determined from multiple QCL relationships. The first QCL relationship is the QCL relationship between the time-frequency offset measurement information of the first TRP and the physical downlink channel of the first TRP.

[0120] The time-frequency offset measurement results of the first TRP are used based on the first QCL relationship.

[0121] The time-frequency offset measurement information here can be a reference signal used for time-frequency offset measurement, such as TRS. The physical downlink channel corresponding to the TRP can be at least one of the TRP's PDCCH and PDSCH, or other physical downlink channels, without specific limitations here.

[0122] After receiving multiple QCL relationships, when using the measurement results for the first TRP, the terminal device can first determine the relationship corresponding to the first TRP from the multiple QCL relationships (which can be represented as the first QCL relationship), and then use the time-frequency offset measurement results for the first TRP according to the first QCL relationship. For example, if the first QCL relationship is the QCL relationship between the reference signal of the first TRP and the PDCCH of the first TRP, then the terminal device can use the time-frequency offset measurement results for the first TRP to perform channel demodulation on the PDCCH of the first TRP.

[0123] In some implementations, the terminal device receives multiple QCL relationships sent by the base station, including:

[0124] The receiver receives RRC signaling from the base station, which carries multiple QCL relationships.

[0125] In other words, terminal devices can receive the QCL relationship established by the base station through RRC signaling.

[0126] In this embodiment, since the terminal device can receive the time-frequency offset measurement information sent by the base station in advance, and activate the time-frequency offset measurement of multiple TRPs in the TRP overlap area in advance according to the base station's instructions when entering the TRP overlap area, the terminal device can directly use the time-frequency offset measurement results of the previous TRP according to the base station's instructions when switching to a certain TRP in the TRP overlap area. This can ensure the data transmission performance of the terminal device, improve downlink spectrum efficiency and downlink traffic, and enhance the user experience.

[0127] To facilitate understanding of the technical solutions provided in the embodiments of this application, a more specific implementation method will be used as an example for description below. Please refer to [link / reference needed] for details. Figure 5 . Figure 5 In this scenario, the logical cell where the base station is located includes six TRPs: TRP1, TRP2, TRP3, TRP4, TRP5, and TRP6. The terminal device is in a high-speed moving scenario, and the moving direction is TRP1→TRP2→TRP3→TRP4→TRP5→TRP6. In this scenario, based on the technical solution provided in the embodiments of this application, the time-frequency offset synchronization can include the following steps S1 to S7.

[0128] S1: The base station sends a reference signal TRS to the terminal equipment for time-frequency offset measurement.

[0129] like Figure 5 As shown, when sending a TRS to the terminal device, these 6 TRPs can send their respective TRSs to the terminal device individually, that is... Figure 5 As shown, TRP1 sends TRS1 to the terminal device, TRP2 sends TRS2 to the terminal device, TRP3 sends TRS3 to the terminal device, TRP4 sends TRS4 to the terminal device, TRP5 sends TRS5 to the terminal device, and TRP6 sends TRS6 to the terminal device. To avoid mutual interference between reference signals of different TRPs, the reference signals of different TRPs can be staggered in the time-frequency domain.

[0130] S2: The base station sends the time-frequency offset measurement configuration to the terminal equipment.

[0131] The base station can send six sets of time-frequency offset measurement configurations to the terminal equipment via RRC signaling. Each set of time-frequency offset measurement configurations corresponds to a TRP and is used to perform time-frequency offset measurement on that TRP. Each set of time-frequency offset measurement configurations can include a QCL type, which can be any one of type A, type B, type C, and type D. The QCL types of different measurement configurations can be the same or different.

[0132] S3: The base station configures multiple QCL relationships for the terminal device.

[0133] The base station can establish QCL relationships between each set of reference signals and the corresponding physical downlink channels (such as PDCCH and PDSCH) of the TRP, obtaining 6 QCL relationships. Then, the 6 QCL relationships are sent to the base station via RRC signaling. Among them, the QCL relationships and the time-frequency offset measurement configuration can be sent simultaneously, that is, the base station can send the 6 sets of time-frequency offset measurement configurations and the corresponding 6 QCL relationships to the terminal device together via RRC signaling.

[0134] like Figure 6 As shown, the base station can establish the QCL relationship between the reference signal of each TRP and the PDCCH / PDSCH of the TRP. The QCL type included in the measurement configuration of each TRP is type A. The base station can send these QCL relationships and QCL types to the terminal device via RRC signaling.

[0135] S4: When the base station determines that the terminal device has entered the overlapping area of ​​multiple TRPs, it sends a MACCE to the terminal device and activates the terminal device to perform time and frequency offset measurement on multiple TRPs through the MACCE.

[0136] like Figure 7As shown, during the movement of the terminal device, if the base station determines that the terminal device has entered the overlapping area of ​​TRP1 and TRP2, it instructs the terminal device to perform time-frequency offset measurements on TRP1 and TRP2 via MAC CE. If the base station determines that the terminal device has entered the overlapping area of ​​TRP2 and TRP3, it instructs the terminal device to perform time-frequency offset measurements on TRP2 and TRP3 via MAC CE. If the base station determines that the terminal device has entered the overlapping area of ​​TRP3 and TRP4, it instructs the terminal device to perform time-frequency offset measurements on TRP3 and TRP4 via MAC CE. If the base station determines that the terminal device has entered the overlapping area of ​​TRP4 and TRP5, it instructs the terminal device to perform time-frequency offset measurements on TRP4 and TRP5 via MAC CE. If the base station determines that the terminal device has entered the overlapping area of ​​TRP5 and TRP6, it instructs the terminal device to perform time-frequency offset measurements on TRP5 and TRP6 via MAC CE.

[0137] It should be noted that in this embodiment, the terminal device can support simultaneous time-frequency offset measurement of two TRPs, and the time-frequency offset measurement indicated by the base station matches the capability information of the terminal device. Specifically, when the base station instructs the terminal device to activate time-frequency offset measurement of two TRPs, the specific format of the MAC CE can be as follows: Figure 8 As shown. Figure 8 Taking the example of the base station instructing the terminal device to perform time-frequency offset measurements on TRP1 and TRP2, the base station can set T0 and T1 in Oct2 to 1, and then send MAC CE to the terminal device to activate the measurement of TRS1 and TRS2 on the terminal device.

[0138] S5: The terminal device performs time-frequency offset measurements on multiple TRPs in the overlapping area according to the instructions of MAC CE.

[0139] like Figure 7 As shown, when the terminal device enters the overlapping area of ​​TRP1 and TRP2, it can perform time-frequency offset measurements on TRP1 and TRP2 according to the instructions of the MAC CE. When entering the overlapping area of ​​TRP2 and TRP3, it can perform time-frequency offset measurements on TRP2 and TRP3 according to the instructions of the MAC CE. When entering the overlapping area of ​​TRP3 and TRP4, it can perform time-frequency offset measurements on TRP3 and TRP4 according to the instructions of the MAC CE. When entering the overlapping area of ​​TRP4 and TRP5, it can perform time-frequency offset measurements on TRP4 and TRP5 according to the instructions of the MAC CE. When entering the overlapping area of ​​TRP5 and TRP6, it can perform time-frequency offset measurements on TRP5 and TRP6 according to the instructions of the MAC CE.

[0140] When performing time-frequency offset measurements, the terminal device can perform these measurements based on the reference signal received in S1 and the measurement configuration received in S2. For example, when measuring the time-frequency offset of TRP1 and TRP2, the Doppler frequency shift, Doppler spread, average delay, and delay spread of TRP1 can be measured based on TRS1, and the Doppler frequency shift, Doppler spread, average delay, and delay spread of TRP2 can be measured based on TRS2.

[0141] S6: When the base station determines that the terminal device has entered a certain TRP among multiple TRPs, it sends a DCI to the terminal device, and instructs the terminal device to use the time-frequency offset measurement results of that TRP through the DCI.

[0142] like Figure 7 As shown, during the movement of the terminal device, when the base station determines that the terminal device is switching from TRP1 to TRP2, it instructs the terminal device to use the time-frequency offset measurement results for TRP2 via DCI. When the base station determines that the terminal device is switching from TRP2 to TRP3, it instructs the terminal device to use the time-frequency offset measurement results for TRP3 via DCI. When the base station determines that the terminal device is switching from TRP3 to TRP4, it instructs the terminal device to use the time-frequency offset measurement results for TRP4 via DCI. When the base station determines that the terminal device is switching from TRP4 to TRP5, it instructs the terminal device to use the time-frequency offset measurement results for TRP5 via DCI. When the base station determines that the terminal device is switching from TRP5 to TRP6, it instructs the terminal device to use the time-frequency offset measurement results for TRP6 via DCI.

[0143] S7: The terminal device uses the time-frequency offset measurement result for a certain TRP according to the DCI instruction.

[0144] like Figure 7 As shown, when the terminal device switches from TRP1 to TRP2, it can use the time-frequency offset measurement results for TRP2 according to the DCI instructions. When switching from TRP2 to TRP3, it can use the time-frequency offset measurement results for TRP3 according to the DCI instructions. When switching from TRP3 to TRP4, it can use the time-frequency offset measurement results for TRP4 according to the DCI instructions. When switching from TRP4 to TRP5, it can use the time-frequency offset measurement results for TRP5 according to the DCI instructions. When switching from TRP5 to TRP6, it can use the time-frequency offset measurement results for TRP6 according to the DCI instructions.

[0145] When using the measurement results for a specific TRP, the terminal device can utilize the QCL relationship received in S3. For example, when using the time-frequency offset measurement results for TRP2, since the QCL relationship corresponding to TRP2 is the relationship between TRS2 and the PDCCH / PDSCH of TRP2, the terminal device can use the time-frequency offset measurement results for TRP2 to perform channel demodulation on the PDCCH / PDSCH of TRP2.

[0146] In this embodiment, since the base station can pre-deploy information for time-frequency offset measurement and pre-activate the terminal device to perform time-frequency offset measurements on multiple TRPs in the TRP overlap area when the terminal device enters the TRP overlap area, the base station can directly instruct the terminal device to use the previous time-frequency offset measurement results for that TRP when the terminal device switches to a certain TRP in the TRP overlap area. This can ensure the data transmission performance of the terminal device, improve downlink spectrum efficiency and downlink traffic, and enhance the user experience.

[0147] The foregoing has described specific embodiments of this application. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recited in the claims may be performed in a different order than that shown in the embodiments and may still achieve the desired results. Furthermore, the processes depicted in the drawings do not necessarily require the specific or sequential order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0148] Figure 9 This is a schematic diagram of the structure of an electronic device according to an embodiment of this application. Please refer to it. Figure 9 At the hardware level, the electronic device includes a processor, and optionally also includes an internal bus, a network interface, and memory. The memory may include main memory, such as high-speed random-access memory (RAM), or non-volatile memory, such as at least one disk drive. Of course, the electronic device may also include other hardware required for other business operations.

[0149] The processor, network interface, and memory can be interconnected via an internal bus, which can be an ISA (Industry Standard Architecture) bus, a PCI (Peripheral Component Interconnect) bus, or an EISA (Extended Industry Standard Architecture) bus, etc. This bus can be divided into address bus, data bus, control bus, etc. For ease of representation, Figure 9 The symbol is represented by a single double-headed arrow, but this does not mean that there is only one bus or one type of bus.

[0150] Memory is used to store programs. Specifically, programs may include program code, which includes computer operation instructions. Memory may include main memory and non-volatile memory, and provides instructions and data to the processor.

[0151] The processor reads the corresponding computer program from non-volatile memory into main memory and then executes it, forming a time-frequency offset synchronization device at the logical level. The processor executes the program stored in memory and specifically performs the following operations:

[0152] Multiple sets of time-frequency offset measurement information are sent to the terminal device. Each set of time-frequency offset measurement information is used by the terminal device to perform time-frequency offset measurement on a Transmitter Receiving Point (TRP).

[0153] If it is determined that the terminal device has entered the overlapping area of ​​multiple TRPs, a first indication message is sent to the terminal device, the first indication message being used to instruct the terminal device to perform time-frequency offset measurement on the multiple TRPs;

[0154] If it is determined that the terminal device switches to the first TRP among the plurality of TRPs, a second indication message is sent to the terminal device, the second indication message being used to instruct the terminal device to use the time-frequency offset measurement result of the first TRP.

[0155] Or it can be used to perform the following operations:

[0156] The terminal device receives multiple sets of time-frequency offset measurement information sent by the base station, and each set of time-frequency offset measurement information is used by the terminal device to perform time-frequency offset measurement on a TRP.

[0157] The terminal device receives a first indication message sent by the base station. The first indication message is sent by the base station when it determines that the terminal device has entered the overlapping area of ​​multiple TRPs. The first indication message is used to instruct the terminal device to perform time-frequency offset measurement on the multiple TRPs.

[0158] Based on the first indication information and the time-frequency offset measurement information of the plurality of TRPs, time-frequency offset measurement is performed on the plurality of TRPs to obtain the time-frequency offset measurement result;

[0159] The terminal device receives a second indication message sent by the base station. The second indication message is sent by the base station when it determines that the terminal device has switched to the first TRP among the plurality of TRPs. The second indication message is used to instruct the terminal device to use the time-frequency offset measurement result of the first TRP.

[0160] Based on the second instruction information, the time-frequency offset measurement results of the first TRP are used.

[0161] The above is as stated in this application. Figure 9 The time-frequency offset synchronization device method disclosed in the illustrated embodiment can be applied to a processor or implemented by a processor. The processor may be an integrated circuit chip with signal processing capabilities. During implementation, each step of the above method can be completed by integrated logic circuits in the processor's hardware or by instructions in software form. The processor can be a general-purpose processor, including a Central Processing Unit (CPU), a Network Processor (NP), etc.; it can also be 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 this application. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in this application can be directly embodied in the execution of a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software module can reside in a mature storage medium in the field, such as random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, or registers. 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.

[0162] The electronic device can also perform Figure 2 or Figure 4 The method, and realize the time-frequency offset synchronization device in Figure 2 or Figure 4 The functions described in the illustrated embodiments will not be repeated here.

[0163] Of course, in addition to software implementation, the electronic device of this application does not exclude other implementation methods, such as logic devices or a combination of hardware and software, etc. In other words, the execution subject of the following processing flow is not limited to each logic unit, but can also be hardware or logic devices.

[0164] This application also discloses a computer-readable storage medium that stores one or more programs, the programs including instructions that, when executed by a portable electronic device including multiple applications, enable the portable electronic device to perform... Figure 2 or Figure 4 The method of the illustrated embodiment is specifically used to perform the following operations:

[0165] Multiple sets of time-frequency offset measurement information are sent to the terminal device. Each set of time-frequency offset measurement information is used by the terminal device to perform time-frequency offset measurement on a Transmitter Receiving Point (TRP).

[0166] If it is determined that the terminal device has entered the overlapping area of ​​multiple TRPs, a first indication message is sent to the terminal device, the first indication message being used to instruct the terminal device to perform time-frequency offset measurement on the multiple TRPs;

[0167] If it is determined that the terminal device switches to the first TRP among the plurality of TRPs, a second indication message is sent to the terminal device, the second indication message being used to instruct the terminal device to use the time-frequency offset measurement result of the first TRP.

[0168] Or it can be used to perform the following operations:

[0169] The terminal device receives multiple sets of time-frequency offset measurement information sent by the base station, and each set of time-frequency offset measurement information is used by the terminal device to perform time-frequency offset measurement on a TRP.

[0170] The terminal device receives a first indication message sent by the base station. The first indication message is sent by the base station when it determines that the terminal device has entered the overlapping area of ​​multiple TRPs. The first indication message is used to instruct the terminal device to perform time-frequency offset measurement on the multiple TRPs.

[0171] Based on the first indication information and the time-frequency offset measurement information of the plurality of TRPs, time-frequency offset measurement is performed on the plurality of TRPs to obtain the time-frequency offset measurement result;

[0172] The terminal device receives a second indication message sent by the base station. The second indication message is sent by the base station when it determines that the terminal device has switched to the first TRP among the plurality of TRPs. The second indication message is used to instruct the terminal device to use the time-frequency offset measurement result of the first TRP.

[0173] Based on the second instruction information, the time-frequency offset measurement results of the first TRP are used.

[0174] Figure 10 This is a schematic diagram of the structure of a time-frequency offset synchronization device 100 according to an embodiment of this application. Please refer to it. Figure 10 In one software implementation, the time-frequency offset synchronization device 100 may include: a first transmitting module 101, a second transmitting module 102, and a third transmitting module 103, wherein:

[0175] The first sending module 101 sends multiple sets of time-frequency offset measurement information to the terminal device. Each set of time-frequency offset measurement information is used by the terminal device to perform time-frequency offset measurement on a transmission receiving point (TRP).

[0176] The second sending module 102, upon determining that the terminal device has entered the overlapping area of ​​multiple TRPs, sends first indication information to the terminal device, the first indication information being used to instruct the terminal device to perform time-frequency offset measurement on the multiple TRPs;

[0177] The third sending module 103, upon determining that the terminal device has switched to the first TRP among the plurality of TRPs, sends a second indication information to the terminal device, the second indication information being used to instruct the terminal device to use the time-frequency offset measurement result of the first TRP.

[0178] In some embodiments, the multiple sets of time-frequency offset measurement information include multiple sets of reference signals and measurement configurations for each set of reference signals; the first transmitting module 101 transmits the multiple sets of time-frequency offset measurement information to the terminal device, including:

[0179] The multiple sets of reference signals are transmitted to the terminal device via the physical downlink channel;

[0180] The measurement configuration for each set of reference signals is sent to the terminal device via Radio Resource Control (RRC) signaling.

[0181] In some implementations, the measurement configuration of each set of reference signals includes a quasi-co-located QCL type, which includes any one of type A, type B, type C, and type D.

[0182] In some embodiments, the device 100 further includes a receiving module, which receives time-frequency offset measurement capability information sent by the terminal device before the second sending module 102 sends the first indication information to the terminal device;

[0183] The second sending module 102 sends first indication information to the terminal device, including:

[0184] Based on the capability information, the first indication information is sent to the terminal device, wherein the time-frequency deviation measurement indicated by the first indication information matches the capability information.

[0185] In some embodiments, the second sending module 102 sends first indication information to the terminal device, including:

[0186] The terminal device is sent a Media Access Control Unit (MAC CE), which carries the first indication information.

[0187] In some embodiments, the third sending module 103 sends second indication information to the terminal device, including:

[0188] Downlink control information (DCI) is sent to the terminal device, and the DCI carries the second indication information.

[0189] In some implementations, the first transmitting module 101 further establishes a QCL relationship between each set of time-frequency offset measurement information and the physical downlink channel of the corresponding TRP, thereby obtaining multiple QCL relationships corresponding to the multiple sets of time-frequency offset measurement information;

[0190] The plurality of QCL relationships are sent to the terminal device, and the plurality of QCL relationships are used by the terminal device to measure the time-frequency offset of the first TRP.

[0191] In some implementations, the first sending module 101 sends the plurality of QCL relationships to the terminal device, including:

[0192] An RRC signaling message is sent to the terminal device, the RRC signaling message carrying the multiple QCL relationships.

[0193] The time-frequency offset synchronization device 100 provided in this application can also perform... Figure 2 The method, and implement the time-frequency offset synchronization device 100 in Figure 2 The functions of the embodiments shown will not be described again in this application.

[0194] Figure 11 This is a schematic diagram of the structure of a time-frequency offset synchronization device 110 according to an embodiment of this application. Please refer to... Figure 11 In one software implementation, the time-frequency offset synchronization device 110 may include: a first receiving module 111, a second receiving module 112, a measurement module 113, a third receiving module 114, and a processing module 115, wherein:

[0195] The first receiving module 111 receives multiple sets of time-frequency offset measurement information sent by the base station. Each set of time-frequency offset measurement information is used by the terminal device to perform time-frequency offset measurement on a TRP.

[0196] The second receiving module 112 receives first indication information sent by the base station. The first indication information is sent by the base station when it determines that the terminal device has entered the overlapping area of ​​multiple TRPs. The first indication information is used to instruct the terminal device to perform time-frequency offset measurement on the multiple TRPs.

[0197] Measurement module 113 performs time-frequency offset measurement on the multiple TRPs based on the first indication information and the time-frequency offset measurement information of the multiple TRPs, and obtains the time-frequency offset measurement result;

[0198] The third receiving module 114 receives second indication information sent by the base station. The second indication information is sent by the base station when it determines that the terminal device has switched to the first TRP among the plurality of TRPs. The second indication information is used to instruct the terminal device to use the time-frequency offset measurement result of the first TRP.

[0199] The processing module 115 uses the time-frequency offset measurement results of the first TRP according to the second instruction information.

[0200] In some embodiments, the multiple sets of time-frequency offset measurement information include multiple sets of reference signals and measurement configurations for each set of reference signals; the first receiving module 111 receives the multiple sets of time-frequency offset measurement information sent by the base station, including:

[0201] The multiple sets of reference signals transmitted by the base station are received through the physical downlink channel;

[0202] The measurement configuration for each set of reference signals sent by the base station is received via RRC signaling.

[0203] In some implementations, the measurement configuration of each set of reference signals includes a QCL type, which includes any one of type A, type B, type C, and type D.

[0204] In some embodiments, the time-frequency offset measurement indicated by the first indication information matches the time-frequency offset measurement capability information of the terminal device; the device 110 further includes a transmitting module, which transmits the time-frequency offset measurement capability information of the terminal device to the base station before the second receiving module 112 receives the first indication information transmitted by the base station.

[0205] In some embodiments, the second receiving module 112 receives first indication information sent by the base station, including:

[0206] The system receives a MAC CE sent by the base station, the MAC CE carrying the first indication information.

[0207] In some embodiments, the third receiving module 114 receives second indication information sent by the base station, including:

[0208] The system receives a DCI sent by the base station, the DCI carrying the second indication information.

[0209] In some implementations, the first receiving module 111 also receives multiple QCL relationships sent by the base station, each QCL relationship being a set of time-frequency offset measurement information and the QCL relationship between the physical downlink channel of the corresponding TRP;

[0210] The processing module 115 uses the time-frequency offset measurement results of the first TRP, including:

[0211] A first QCL relationship is determined from the plurality of QCL relationships, wherein the first QCL relationship is the QCL relationship between the time-frequency offset measurement information of the first TRP and the physical downlink channel of the first TRP;

[0212] The time-frequency offset measurement results of the first TRP are used based on the first QCL relationship.

[0213] In some implementations, the first receiving module 111 receives multiple QCL relationships sent by the base station, including:

[0214] The system receives RRC signaling sent by the base station, wherein the RRC signaling carries the multiple QCL relationships.

[0215] The time-frequency offset synchronization device 110 provided in this application can also perform... Figure 4 The method, and realize the time-frequency offset synchronization device 110 in Figure 4 The functions of the embodiments shown will not be described again in this application.

[0216] This application also proposes a computer program product comprising a non-transitory computer-readable storage medium storing a computer program operable to cause a computer to perform some or all of the steps in the above-described time-frequency offset synchronization method embodiments.

[0217] In summary, the above description is merely a preferred embodiment of this application and is not intended to limit the scope of protection of this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

[0218] The systems, devices, modules, or units described in the above embodiments can be implemented by computer chips or entities, or by products with certain functions. A typical implementation device is a computer. Specifically, a computer can be, for example, a personal computer, laptop computer, cellular phone, camera phone, smartphone, personal digital assistant, media player, navigation device, email device, game console, tablet computer, wearable device, or any combination of these devices.

[0219] Computer-readable media includes both permanent and non-permanent, removable and non-removable media that can store information using any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic magnetic disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.

[0220] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0221] The various embodiments in this application are described in a progressive manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions of the method embodiments.

Claims

1. A time-frequency offset synchronization method, applied to a base station, comprising: Multiple sets of time-frequency offset measurement information and multiple QCL relationships corresponding to the multiple sets of time-frequency offset measurement information are sent to the terminal device. Each set of time-frequency offset measurement information is used by the terminal device to perform time-frequency offset measurement on a Transmitter Receiving Point (TRP). Each QCL relationship is the QCL relationship between each set of time-frequency offset measurement information and the physical downlink channel of the corresponding TRP. The multiple QCL relationships are used by the terminal device to apply the time-frequency offset measurement results of the first TRP. In response to determining that the terminal device has entered the overlapping area of ​​multiple TRPs, a first indication information is sent to the terminal device, the first indication information being used to instruct the terminal device to perform time-frequency offset measurement on the multiple TRPs; In response to determining that the terminal device has switched to a first TRP among the plurality of TRPs, a second indication message is sent to the terminal device, the second indication message being used to instruct the terminal device to use the time-frequency offset measurement result of the first TRP.

2. The method as described in claim 1, wherein the multiple sets of time-frequency offset measurement information include multiple sets of reference signals and the measurement configuration of each set of reference signals; the step of sending the multiple sets of time-frequency offset measurement information to the terminal device includes: The multiple sets of reference signals are transmitted to the terminal device via the physical downlink channel; The measurement configuration for each set of reference signals is sent to the terminal device via Radio Resource Control (RRC) signaling.

3. The method of claim 2, wherein the measurement configuration of each set of reference signals includes a quasi-co-located QCL type, wherein the QCL type includes any one of type A, type B, type C and type D.

4. The method of claim 1, further comprising, before sending the first indication information to the terminal device: The terminal device receives time-frequency deviation measurement capability information. Sending the first instruction information to the terminal device includes: Based on the capability information, the first indication information is sent to the terminal device, wherein the time-frequency deviation measurement indicated by the first indication information matches the capability information.

5. The method as described in claim 1 or 4, wherein sending the first indication information to the terminal device includes: The terminal device is sent a Media Access Control Unit (MAC CE), which carries the first indication information.

6. The method of claim 1, wherein sending the second indication information to the terminal device comprises: Downlink control information (DCI) is sent to the terminal device, and the DCI carries the second indication information.

7. The method of claim 1, further comprising: Establish the QCL relationship between each set of time-frequency offset measurement information and the physical downlink channel of the corresponding TRP to obtain multiple QCL relationships corresponding to the multiple sets of time-frequency offset measurement information.

8. The method of claim 1, wherein sending the plurality of QCL relationships to the terminal device comprises: An RRC signaling message is sent to the terminal device, the RRC signaling message carrying the multiple QCL relationships.

9. A time-frequency offset synchronization method, applied to a terminal device, comprising: The terminal device receives multiple sets of time-frequency offset measurement information and multiple QCL relationships sent by the base station. Each set of time-frequency offset measurement information is used by the terminal device to perform time-frequency offset measurement on a TRP. Each QCL relationship is the QCL relationship between a set of time-frequency offset measurement information and the physical downlink channel of the corresponding TRP. The terminal device receives a first indication message sent by the base station. The first indication message is sent by the base station in response to determining that the terminal device has entered the overlapping area of ​​multiple TRPs. The first indication message is used to instruct the terminal device to perform time-frequency offset measurement on the multiple TRPs. Based on the first indication information and the time-frequency offset measurement information of the plurality of TRPs, time-frequency offset measurement is performed on the plurality of TRPs to obtain the time-frequency offset measurement result; The terminal device receives a second indication message sent by the base station. The second indication message is sent by the base station in response to determining that the terminal device is switching to the first TRP among the plurality of TRPs. The second indication message is used to instruct the terminal device to use the time-frequency offset measurement result of the first TRP. According to the second indication information, a first QCL relationship is determined from the plurality of QCL relationships, wherein the first QCL relationship is the QCL relationship between the time-frequency offset measurement information of the first TRP and the physical downlink channel of the first TRP; The time-frequency offset measurement results of the first TRP are used based on the first QCL relationship.

10. The method of claim 9, wherein the multiple sets of time-frequency offset measurement information include multiple sets of reference signals and measurement configurations for each set of reference signals; the receiving of the multiple sets of time-frequency offset measurement information sent by the base station includes: The multiple sets of reference signals transmitted by the base station are received through the physical downlink channel; The measurement configuration for each set of reference signals sent by the base station is received via RRC signaling.

11. The method of claim 10, wherein the measurement configuration of each set of reference signals includes a QCL type, wherein the QCL type includes any one of type A, type B, type C, and type D.

12. The method of claim 9, wherein the time-frequency offset measurement indicated by the first indication information matches the time-frequency offset measurement capability information of the terminal device; before receiving the first indication information sent by the base station, the method further includes: The terminal device's ability to measure time-frequency offset is sent to the base station.

13. The method of claim 9, wherein receiving the first indication information sent by the base station includes: The system receives a MAC CE sent by the base station, the MAC CE carrying the first indication information.

14. The method of claim 9, wherein receiving the second indication information sent by the base station includes: The system receives a DCI sent by the base station, the DCI carrying the second indication information.

15. The method of claim 9, wherein receiving multiple QCL relationships sent by the base station includes: The system receives RRC signaling sent by the base station, wherein the RRC signaling carries the multiple QCL relationships.

16. An electronic device comprising: processor; Memory used to store the processor's executable instructions; The processor is configured to execute the instructions to implement the method as described in any one of claims 1 to 15.

17. A computer-readable storage medium, wherein instructions in the storage medium, when executed by a processor of an electronic device, enable the electronic device to perform the method as claimed in any one of claims 1 to 15.

18. A computer program product comprising a non-transitory computer-readable storage medium storing a computer program operable to cause a computer to perform some or all of the steps of the method as claimed in any one of claims 1 to 15.

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