Method and device for measuring timing advance (TA)

Abstract

A timing advance (TA) measurement method and apparatus, relating to the technical field of communications, comprises: a network device (101) measuring a TA from a terminal device (102) to a candidate cell on the basis of target information sent by the terminal device (102); and the network device (101) indicates or updates the TA of the candidate cell to the terminal device. According to the method, the TA value of the user to each candidate cell can be measured in advance, and the TA value of each candidate cell is indicated or updated for the user, so that the target cell can be accessed more quickly during inter-cell switching, and the time overhead of switching is reduced.

Description

A method and device for measuring timing advance TA Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a method and device for measuring a timing advance (TA). Background Art

[0002] The base station will maintain multiple candidate cells for users. When switching cells, it will select one cell from multiple candidate cells as the target cell. However, the TAs of the user to each serving cell and candidate cell may be different. When switching to a cell with a different TA, random access is required to synchronize to the target cell, resulting in a corresponding increase in the time overhead when accessing the target cell.

[0003] Summary of the Invention

[0004] The embodiments of the present application provide a method and apparatus for measuring timing advance TA, which can pre-measure the TA value of the user to each candidate cell and indicate or update the TA value of each candidate cell for the user. When performing inter-cell switching, the user can access the target cell more quickly, reducing the time overhead of switching.

[0005] In a first aspect, an embodiment of the present application provides a method for measuring a timing advance TA, which is executed by a network device. The method includes: measuring the TA of the terminal device to the candidate cell based on the target information sent by the terminal device; and indicating or updating the TA of the candidate cell to the terminal device.

[0006] In an embodiment of the present application, based on the target information sent by the terminal device, the TA from the terminal device to the candidate cell is measured; the TA of the candidate cell is indicated or updated to the terminal device, the TA value from the user to each candidate cell can be measured in advance, and the TA value of each candidate cell can be indicated or updated for the user, so that when switching between cells, the target cell can be accessed faster, reducing the time overhead of switching.

[0007] In the second aspect, an embodiment of the present application provides a method for measuring a timing advance TA, which is executed by a terminal device, and the method includes: sending target information corresponding to a candidate cell to a network device, and the target information is used to measure the TA between the terminal device and the candidate cell; and receiving an indication sent by the network device or information to update the TA of the candidate cell.

[0008] In an embodiment of the present application, target information corresponding to a candidate cell is sent to a network device, and the target information is used to measure the TA of the terminal device to the candidate cell; information indicating or updating the TA of the candidate cell sent by the network device is received, and the TA value of the user to each candidate cell can be measured in advance, and the TA value of each candidate cell can be indicated or updated for the user in advance. When switching between cells, the target cell can be accessed more quickly, reducing the time overhead of switching.

[0009] In a third aspect, an embodiment of the present application provides a communication device that implements some or all of the functions of the terminal device in the method described in the first aspect above. For example, the functions of the communication device may have the functions of some or all of the embodiments in this application, or may have the functions of implementing any one of the embodiments in this application separately. The functions may be implemented by hardware or by hardware executing corresponding software. The hardware or software includes one or more units or modules corresponding to the above functions.

[0010] In one implementation, the communication device may include a transceiver module and a processing module, wherein the processing module is configured to support the communication device in performing the corresponding functions of the above-mentioned method. The transceiver module is used to support communication between the communication device and other devices. The communication device may also include a storage module, which is coupled to the transceiver module and the processing module and stores computer programs and data necessary for the communication device.

[0011] As an example, the processing module may be a processor, the transceiver module may be a transceiver or a communication interface, and the storage module may be a memory.

[0012] In a fourth aspect, an embodiment of the present application provides another communication device, which has some or all of the functions of the network device in the method example described in the second aspect above. For example, the functions of the communication device may have some or all of the functions in the embodiments of the present application, or may have the functions of implementing any one of the embodiments of the present application separately. The functions may be implemented by hardware or by hardware executing corresponding software. The hardware or software includes one or more units or modules corresponding to the above functions.

[0013] In one implementation, the communication device may include a transceiver module and a processing module, the processing module being configured to support the communication device in performing the corresponding functions of the above-described method. The transceiver module is configured to support communication between the communication device and other devices. The communication device may also include a storage module, coupled to the transceiver module and the processing module, which stores computer programs and data necessary for the communication device.

[0014] In a fifth aspect, an embodiment of the present application provides a communication device, which includes a processor. When the processor calls a computer program in a memory, it executes the method described in the first aspect above.

[0015] In a sixth aspect, an embodiment of the present application provides a communication device, which includes a processor. When the processor calls a computer program in a memory, it executes the method described in the second aspect above.

[0016] In the seventh aspect, an embodiment of the present application provides a communication device, which includes a processor and a memory, in which a computer program is stored; the processor executes the computer program stored in the memory so that the communication device executes the method described in the first aspect above.

[0017] In an eighth aspect, an embodiment of the present application provides a communication device, which includes a processor and a memory, in which a computer program is stored; the processor executes the computer program stored in the memory so that the communication device executes the method described in the second aspect above.

[0018] In the ninth aspect, an embodiment of the present application provides a communication device, which includes a processor and an interface circuit, wherein the interface circuit is used to receive code instructions and transmit them to the processor, and the processor is used to run the code instructions to enable the device to execute the method described in the first aspect above.

[0019] In the tenth aspect, an embodiment of the present application provides a communication device, which includes a processor and an interface circuit, the interface circuit is used to receive code instructions and transmit them to the processor, and the processor is used to run the code instructions to enable the device to execute the method described in the second aspect above.

[0020] In the eleventh aspect, an embodiment of the present application provides a timing advance TA measurement system, which includes the communication device described in the third aspect and the communication device described in the fourth aspect, or the system includes the communication device described in the fifth aspect and the communication device described in the sixth aspect, or the system includes the communication device described in the seventh aspect and the communication device described in the eighth aspect, or the system includes the communication device described in the ninth aspect and the communication device described in the tenth aspect.

[0021] In a twelfth aspect, an embodiment of the present invention provides a computer-readable storage medium for storing instructions for the above-mentioned terminal device, and when the instructions are executed, the terminal device executes the method described in the above-mentioned first aspect.

[0022] In a thirteenth aspect, an embodiment of the present invention provides a readable storage medium for storing instructions used by the above-mentioned network device, and when the instructions are executed, the network device executes the method described in the above-mentioned second aspect.

[0023] In a fourteenth aspect, the present application also provides a computer program product comprising a computer program, which, when executed on a computer, enables the computer to execute the method described in the first aspect above.

[0024] In a fifteenth aspect, the present application also provides a computer program product comprising a computer program, which, when executed on a computer, enables the computer to execute the method described in the second aspect above.

[0025] In a sixteenth aspect, the present application provides a chip system, which includes at least one processor and an interface, for supporting a terminal device in implementing the functions involved in the first aspect, for example, determining or processing at least one of the data and information involved in the above method. In one possible design, the chip system also includes a memory, which is used to store computer programs and data necessary for the terminal device. The chip system can be composed of a chip or can include a chip and other discrete devices.

[0026] In a seventeenth aspect, the present application provides a chip system comprising at least one processor and an interface for supporting a network device in implementing the functions described in the second aspect, such as determining or processing at least one of the data and information described in the above method. In one possible design, the chip system further comprises a memory for storing computer programs and data necessary for the network device. The chip system may consist of a chip or may include a chip and other discrete components.

[0027] In an eighteenth aspect, the present application provides a computer program which, when executed on a computer, enables the computer to execute the method described in the first aspect above.

[0028] In a nineteenth aspect, the present application provides a computer program which, when executed on a computer, enables the computer to execute the method described in the second aspect above. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the background technology, the drawings required for use in the embodiments of the present application or the background technology will be described below.

[0030] FIG1 is a schematic diagram of the architecture of a communication system provided in an embodiment of the present application;

[0031] FIG2 is a flow chart of a method for measuring a timing advance TA provided in an embodiment of the present application;

[0032] FIG3 is a schematic diagram of performing timing advance TA measurement according to an embodiment of the present application;

[0033] FIG4 is a flow chart of a method for measuring a timing advance TA provided in an embodiment of the present application;

[0034] FIG5 is a flow chart of a method for measuring a timing advance TA according to an embodiment of the present application;

[0035] FIG6 is a schematic diagram of performing timing advance TA measurement according to an embodiment of the present application;

[0036] FIG7 is a flow chart of a method for measuring a timing advance TA according to an embodiment of the present application;

[0037] FIG8 is a flow chart of a method for measuring a timing advance TA according to an embodiment of the present application;

[0038] FIG9 is a flow chart of a method for measuring a timing advance TA according to an embodiment of the present application;

[0039] FIG10 is a schematic structural diagram of a communication device provided in an embodiment of the present application;

[0040] FIG11 is a schematic structural diagram of a communication device provided in an embodiment of the present application;

[0041] FIG12 is a schematic structural diagram of a chip provided in an embodiment of the present application. DETAILED DESCRIPTION

[0042] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all possible embodiments consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

[0043] The terms used in the embodiments of the present disclosure are for the purpose of describing specific embodiments only and are not intended to limit the embodiments of the present disclosure. The singular forms "a," "an," and "the" used in the embodiments of the present disclosure and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0044] It should be understood that although the terms first, second, third, etc. may be used to describe various information in the embodiments of the present disclosure, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of the embodiments of the present disclosure, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining" For the purpose of brevity and ease of understanding, the terms used herein when characterizing size relationships are "greater than" or "less than", "higher than" or "lower than". However, for those skilled in the art, it can be understood that the term "greater than" also covers the meaning of "greater than or equal to", and "less than" also covers the meaning of "less than or equal to"; the term "higher than" covers the meaning of "higher than or equal to", and "lower than" also covers the meaning of "lower than or equal to".

[0045] To facilitate understanding, the terms involved in this application are first introduced.

[0046] Timing Advance (TA) is used for uplink transmission of terminal devices. It means that the system frame of uplink data sent by the terminal device is a certain time ahead of the corresponding downlink frame.

[0047] In order to better understand the timing advance TA measurement method disclosed in the embodiment of the present application, the communication system to which the embodiment of the present application is applicable is first described below.

[0048] Please refer to Figure 1, which is a schematic diagram of the architecture of a communication system provided in an embodiment of the present application. The communication system may include, but is not limited to, a network device and a terminal device. The number and form of devices shown in Figure 1 are for example purposes only and do not constitute a limitation on the embodiments of the present application. In actual applications, two or more network devices and two or more terminal devices may be included. The communication system shown in Figure 1 includes, for example, a network device 101 and a terminal device 102.

[0049] It should be noted that the technical solutions of the embodiments of the present application can be applied to various communication systems. For example: long term evolution (LTE) system, fifth generation (5G) mobile communication system, 5G new radio (NR) system, or other future new mobile communication systems. It should also be noted that the side link in the embodiments of the present application can also be referred to as a side link or a direct link.

[0050] The network device 101 in the embodiment of the present application is an entity on the network side for transmitting or receiving signals. For example, the network device 101 can be an evolved NodeB (eNB), a transmission reception point (TRP), a next generation NodeB (gNB) in an NR system, a base station in other future mobile communication systems, or an access node in a wireless fidelity (WiFi) system. The embodiments of the present application do not limit the specific technology and specific device form adopted by the network device. The network device provided in the embodiment of the present application can be composed of a centralized unit (CU) and a distributed unit (DU), wherein the CU can also be called a control unit. The CU-DU structure can be used to split the protocol layer of the network device, such as the base station, and the functions of some protocol layers are placed in the CU for centralized control, and the functions of the remaining part or all of the protocol layers are distributed in the DU, and the DU is centrally controlled by the CU.

[0051] The terminal device 102 in the embodiment of the present application is an entity on the user side for receiving or transmitting signals, such as a mobile phone. The terminal device can also be called a terminal device (terminal), user equipment (UE), mobile station (MS), mobile terminal device (MT), etc. The terminal device can be a car with communication function, a smart car, a mobile phone, a wearable device, a tablet computer (Pad), a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control (industrial control), a wireless terminal device in self-driving, a wireless terminal device in remote medical surgery, a wireless terminal device in smart grid (smart grid), a wireless terminal device in transportation safety (transportation safety), a wireless terminal device in smart city (smart city), a wireless terminal device in smart home (smart home), etc. The embodiment of the present application does not limit the specific technology and specific device form adopted by the terminal device.

[0052] In sidelink communication, there are four sidelink transmission modes. Sidelink transmission mode 1 and sidelink transmission mode 2 are used for device-to-device (D2D) communication. Sidelink transmission mode 3 and sidelink transmission mode 4 are used for V2X communication. When sidelink transmission mode 3 is adopted, resource allocation is scheduled by network device 101. Specifically, network device 101 can send resource allocation information to terminal device 102, and then the terminal device 102 allocates resources to another terminal device, so that the other terminal device can send information to network device 101 through the allocated resources. In V2X communication, a terminal device with better signal or higher reliability can be used as terminal device 102. The first terminal device mentioned in the embodiment of the present application may refer to the terminal device 102, and the second terminal device may refer to the other terminal device.

[0053] It can be understood that the communication system described in the embodiment of the present application is for the purpose of more clearly illustrating the technical solution of the embodiment of the present application, and does not constitute a limitation on the technical solution provided by the embodiment of the present application. Ordinary technicians in this field can know that with the evolution of the system architecture and the emergence of new business scenarios, the technical solution provided by the embodiment of the present application is also applicable to similar technical problems.

[0054] It should be noted that the timing advance TA measurement method provided in any embodiment of the present application can be executed alone, or in combination with possible implementation methods in other embodiments, or in combination with any technical solution in related technologies.

[0055] The timing advance TA measurement method and device provided in this application are described in detail below with reference to the accompanying drawings.

[0056] Please refer to Figure 2, which is a flow chart of a method for measuring a timing advance TA provided in an embodiment of the present application. The method for measuring a timing advance TA is executed by a network device. The method for measuring a timing advance TA includes but is not limited to the following steps:

[0057] S201, based on the target information sent by the terminal device, measure the TA between the terminal device and the candidate cell.

[0058] Optionally, the network device may be a network device of a source cell.

[0059] It should be noted that the base station will maintain multiple candidate cells for users. When switching cells, one cell will be selected from the multiple candidate cells as the target cell. However, the TA values ​​of the user to each source cell and the candidate cell may be different. When switching to a cell with a different TA, random access is required to synchronize to the target cell, resulting in a corresponding increase in the time overhead when accessing the target cell. Therefore, the TA value of the user to each candidate cell can be obtained in advance so that the target cell can be accessed as soon as possible during switching.

[0060] It should be noted that when switching cells, the candidate cell may be a cell to which the terminal device may subsequently switch, specifically a surrounding cell of the serving cell where the terminal is currently located, and the source cell may be the cell to which the terminal device is currently accessed.

[0061] Optionally, a preamble sequence sent by the terminal device may be received, and the TA from the terminal device to the candidate cell may be measured according to the preamble sequence.

[0062] Optionally, when receiving the preamble sequence of the candidate cell sent by the terminal device, the preamble sequence periodically sent by the terminal device can be received; the terminal device can also be triggered to perform random access, and the preamble sequence sent by the terminal device during the triggered random access process can be received.

[0063] Optionally, the network device may receive a sounding reference signal (SRS) of a candidate cell sent by the terminal device, and measure the TA from the terminal device to the candidate cell according to the SRS.

[0064] In an embodiment of the present application, the network device can receive the SRS information configured by the source cell for the terminal device, and determine the receiving time-frequency position of the SRS based on the SRS information, receive the SRS sent by the terminal device at the receiving time-frequency position, and then measure the TA of the terminal device to the candidate cell based on the SRS.

[0065] S202: Indicate or update the TA of the candidate cell to the terminal device.

[0066] It should be noted that the terminal device may be configured with multiple candidate cells. After obtaining the TA of the terminal device and each candidate cell, the network device may optionally indicate or update the TA of each candidate cell separately to the terminal device. Alternatively, the network device may indicate or update the TA of all candidate cells together to the terminal device.

[0067] In an embodiment of the present application, the network device corresponding to the source cell may directly indicate or update the TA of the candidate cell to the terminal device. In some implementations, the network device may indicate or update the TA of the candidate cell to the terminal device via a random access response.

[0068] In an embodiment of the present application, when indicating or updating for the first time, the network device may indicate or update the TA of the candidate cell to the terminal device, that is, indicate or update the absolute value of the TA of the candidate cell to the terminal device. When it is not the first time to indicate or update the TA of the candidate cell, the network device may indicate or update the adjustment amount of the TA of the candidate cell to the terminal device.

[0069] Optionally, when the TA of a candidate cell is indicated or updated for the first time, the TA of the candidate cell may be indicated or updated to the terminal device through a random access response.

[0070] For example, when indicating or updating the TA of a candidate cell for the first time, the network device can update the TA through the Media Access Control Control Element (MAC CE), where the MAC CE contains at least the candidate cell identifier, and the indication field is 12 bits for indicating the TA value, so as to indicate or update the TA of the candidate cell to the terminal device through a random access response.

[0071] For example, when it is not the first time to indicate or update the TA of the candidate cell, the network device may configure the adjustment amount of the TA of the candidate cell to the terminal device through Radio Resource Control (RRC) configuration information.

[0072] In an embodiment of the present application, based on the target information sent by the terminal device, the TA between the terminal device and the candidate cell is measured, and the TA of the candidate cell is indicated or updated to the terminal device. In the present application, the TA value of the user to each candidate cell can be pre-measured before inter-cell handover, and the TA value of each candidate cell can be indicated or updated for the user. When performing inter-cell handover, the target cell can be accessed more quickly, reducing the time overhead of handover.

[0073] Please refer to Figure 3, which is a flow chart of a method for measuring a timing advance TA provided in an embodiment of the present application. The method for measuring a timing advance TA is executed by a network device. The method for measuring a timing advance TA includes but is not limited to the following steps:

[0074] S301, receiving a preamble sequence of a candidate cell sent by a terminal device.

[0075] Optionally, the network device may be a network device of a source cell.

[0076] In an embodiment of the present application, optionally, a preamble sequence sent by a terminal device on a randomly accessed time-frequency RO resource can be received; optionally, a preamble sequence sent by a terminal device on an optimal beam of a candidate cell through an RO resource can be received.

[0077] It should be noted that the present application does not limit the method for determining the optimal beam.

[0078] Optionally, the candidate cell can be determined to be an RO resource preconfigured by the terminal device, and multiple beams of the candidate cell all correspond to the RO resource. The preamble sequence sent by the terminal device on the optimal beam through the RO resource is received, wherein the beam measurement result can be used to determine the optimal beam of the candidate cell. Furthermore, first radio resource control RRC configuration information is sent to the terminal device, and the first RRC configuration information is used to instruct the terminal device to obtain the beam measurement result of the candidate cell. The terminal device can also report the measurement result to the candidate cell, and accordingly, the candidate cell can determine the optimal beam selected by the terminal device to send the preamble sequence based on the beam measurement result.

[0079] Optionally, the serving cell may configure the candidate cell to preconfigure multiple RO resources for the terminal device, wherein the multiple RO resources correspond to multiple beams of the candidate cell, and receive the preamble sequence sent by the terminal device through the target RO resource on the target beam corresponding to the target RO resource, wherein the target RO resource is one of the multiple preconfigured RO resources selected by the terminal device, and the target beam corresponding to the target RO resource is the optimal beam.

[0080] Furthermore, second RRC configuration information is sent to the terminal device, and the second RRC configuration information is used to indicate at least one of the multiple RO resources and / or multiple preamble sequences preconfigured by the candidate cell for the terminal device. The multiple preamble sequences correspond to the multiple RO resources, that is, different RO resources can use different preamble sequences.

[0081] It should be noted that the terminal device can send the preamble sequence of the candidate cell to all candidate cells. The terminal device can also send the preamble sequence of the candidate cell to the candidate cell only when the beam measurement result of the candidate cell meets certain conditions.

[0082] For example, the terminal device will send the preamble sequence of the candidate cell to the candidate cell only if the best beam measurement result of the candidate cell is greater than the best beam measurement result of the source cell + the offset value offset; the terminal device will send the preamble sequence of the candidate cell to the candidate cell only if the average value of the beam measurement results of the candidate cell is greater than the average value of the beam measurement results of the source cell + the offset value; the terminal device will send the preamble sequence of the candidate cell to the candidate cell only if the average value or maximum value of the beam measurement results of the candidate cell is greater than the beam measurement threshold of the candidate cell; the terminal device will send the preamble sequence of the candidate cell to the candidate cell only if the top N best measurement results are the measurement results of the candidate cell.

[0083] Optionally, the terminal device may be triggered to perform random access, and a preamble sequence sent by the terminal device during the triggered random access process may be received.

[0084] Optionally, a physical downlink control channel (PDCCH) order may be reused to periodically trigger a terminal device to perform random access to send a preamble sequence; optionally, after the PDCCH order is reused to first trigger a terminal device to perform random access to send a preamble sequence, the terminal device may receive a preamble sequence periodically sent by the terminal device. The PDCCH order is used to trigger a terminal device to perform random access.

[0085] It should be noted that the terminal device's status information may also be monitored, and whether TA measurement needs to be re-performed may be determined based on the terminal device's status information. If it is determined that TA measurement needs to be re-performed, the terminal device may be triggered to perform random access to send a preamble sequence. The status information may include location information, speed information, etc. of the terminal device.

[0086] Optionally, the PDCCH order can be reused to trigger the terminal device to perform random access for the first time to send the preamble sequence, and the status information of the terminal device can be monitored. It can be determined whether TA measurement needs to be re-performed based on the status information of the terminal device. If it is determined that TA measurement needs to be re-performed, the PDCCH order can be reused again to trigger the terminal device to perform random access to send the preamble sequence.

[0087] Furthermore, after triggering the terminal device to perform random access to send the preamble sequence, the preamble sequence may be sent periodically and the TA of the candidate cell may be measured, that is, the TA of the candidate cell may be measured semi-statically.

[0088] Furthermore, the cell identifier of the candidate cell that needs to be randomly accessed can be indicated to the terminal device through the PDCCH order, and at least one of the RO, preamble sequence and transmit beam information corresponding to the candidate cell that needs to be randomly accessed can also be indicated to the terminal device through the PDCCH order.

[0089] Furthermore, when receiving the preamble sequence sent by the terminal device on the randomly accessed time-frequency resource RO, second RRC configuration information can be sent to the terminal device, and the second RRC configuration information is used to pre-configure the candidate RO and / or candidate preamble sequence corresponding to the candidate cell for the terminal device.

[0090] S302: Measure the TA from the terminal device to the candidate cell according to the preamble sequence.

[0091] S303: Indicate or update the TA of the candidate cell to the terminal device.

[0092] It should be noted that the terminal device may be configured with multiple candidate cells. After obtaining the TA of the terminal device and each candidate cell, the network device may optionally indicate or update the TA of each candidate cell separately to the terminal device. Alternatively, the network device may indicate or update the TA of all candidate cells together to the terminal device.

[0093] In an embodiment of the present application, the network device corresponding to the source cell may directly indicate or update the TA of the candidate cell to the terminal device. In some implementations, the network device may indicate or update the TA of the candidate cell to the terminal device via a random access response.

[0094] In an embodiment of the present application, when indicating or updating for the first time, the network device may indicate or update the TA of the candidate cell to the terminal device, that is, indicate or update the absolute value of the TA of the candidate cell to the terminal device. When it is not the first time to indicate or update the TA of the candidate cell, the network device indicates or updates the adjustment amount of the TA of the candidate cell to the terminal device.

[0095] Optionally, when the TA of a candidate cell is indicated or updated for the first time, the TA of the candidate cell may be indicated or updated to the terminal device through a random access response.

[0096] For example, when indicating or updating the TA of a candidate cell for the first time, the TA can be updated through the MAC CE, wherein the MAC CE contains at least the candidate cell identifier, and the indication field is 12 bits for indicating the TA value, so as to indicate or update the TA of the candidate cell to the terminal device through a random access response.

[0097] For example, when the TA of the candidate cell is not indicated or updated for the first time, the adjustment amount of the TA of the candidate cell can be configured to the terminal device through RRC configuration information.

[0098] In an embodiment of the present application, a preamble sequence of a candidate cell sent by a terminal device can be received, and the TA from the terminal device to the candidate cell can be measured based on the preamble sequence, and the TA of the candidate cell can be indicated or updated to the terminal device. In the present application, the TA value from the user to each candidate cell can be pre-measured before an inter-cell handover, and the TA value of each candidate cell can be indicated or updated for the user. When an inter-cell handover is performed, the target cell can be accessed more quickly, reducing the time overhead of the handover.

[0099] Please refer to Figure 4, which is a flow chart of a method for measuring a timing advance TA provided in an embodiment of the present application. The method for measuring a timing advance TA is executed by a network device. The method for measuring a timing advance TA includes but is not limited to the following steps:

[0100] S401: Receive an SRS of a candidate cell sent by a terminal device.

[0101] Optionally, the network device may be a network device of a source cell.

[0102] Optionally, the network device may receive SRS information configured by the source cell for the terminal device, determine the receiving time-frequency position of the SRS according to the SRS information, and receive the SRS sent by the terminal device at the receiving time-frequency position.

[0103] Optionally, the network device may obtain the SRS transmission period of the candidate cell from the SRS information. After determining the SRS transmission period, the network device may receive the SRS of the candidate cell according to the SRS transmission period.

[0104] S402: Measure the TA from the terminal device to the candidate cell according to the SRS.

[0105] It should be noted that, based on the SRS information of the candidate cell, the SRS corresponding to the candidate cell can be received at the reception time-frequency position of the SRS, so as to measure the TA from the terminal device to the candidate cell based on the SRS and obtain the TA of the candidate cell.

[0106] In the embodiment of the present application, the TA's measurement period can also be obtained based on the SRS information. Optionally, the TA's measurement period can be implicitly determined based on the SRS transmission period in the SRS information. Optionally, the TA's measurement period can be set to N times the SRS transmission period.

[0107] Optionally, the measurement period of the TA may be configured implicitly or explicitly by the network device.

[0108] S403: Indicate or update the TA of the candidate cell to the terminal device.

[0109] For a detailed description of step S403, please refer to the relevant contents in the embodiments of this application, which will not be repeated here.

[0110] In an embodiment of the present application, an SRS of a candidate cell sent by a terminal device is received, and based on the SRS, the TA of the candidate cell is measured, and the TA of the candidate cell is indicated or updated to the terminal device. In the present application, the TA value of the user to each candidate cell can be pre-measured before an inter-cell handover, and the TA value of each candidate cell can be indicated or updated for the user. When an inter-cell handover is performed, the target cell can be accessed more quickly, reducing the time overhead of the handover.

[0111] Please refer to Figure 5, which is a flow chart of a method for measuring a timing advance TA provided in an embodiment of the present application. The method for measuring a timing advance TA is executed by a network device. The method for measuring a timing advance TA includes but is not limited to the following steps:

[0112] S501: Receive a preamble sequence periodically sent by a terminal device.

[0113] Optionally, the network device may be a network device of a source cell.

[0114] In an embodiment of the present application, a sending period for sending a preamble sequence may be configured for the terminal device.

[0115] Optionally, the sending period may be configured by the base station; optionally, the sending period may be a period of time-frequency RO resources.

[0116] In an embodiment of the present application, optionally, a preamble sequence sent by a terminal device on a randomly accessed time-frequency RO resource can be received; optionally, a preamble sequence sent by a terminal device on an optimal beam of a candidate cell through an RO resource can be received.

[0117] Optionally, the candidate cell can be determined to be an RO resource preconfigured by the terminal device, and multiple beams of the candidate cell all correspond to the RO resource. The preamble sequence sent by the terminal device on the optimal beam through the RO resource is received, wherein the beam measurement result can be used to determine the optimal beam of the candidate cell. Furthermore, first radio resource control RRC configuration information is sent to the terminal device, and the first RRC configuration information is used to instruct the terminal device to obtain the beam measurement result of the candidate cell. The terminal device can also report the measurement result to the candidate cell, and accordingly, the candidate cell can determine the optimal beam selected by the terminal device to send the preamble sequence based on the beam measurement result.

[0118] Optionally, the serving cell may configure the candidate cell to preconfigure multiple RO resources for the terminal device, wherein the multiple RO resources correspond to multiple beams of the candidate cell, and receive the preamble sequence sent by the terminal device through the target RO resource on the target beam corresponding to the target RO resource, wherein the target RO resource is one of the multiple preconfigured RO resources selected by the terminal device, and the target beam corresponding to the target RO resource is the optimal beam.

[0119] Furthermore, second RRC configuration information is sent to the terminal device, and the second RRC configuration information is used to indicate at least one of the multiple RO resources and / or multiple preamble sequences preconfigured by the candidate cell for the terminal device. The multiple preamble sequences correspond to the multiple RO resources, that is, different RO resources can use different preamble sequences.

[0120] In the embodiment of the present application, a transmission period of the preamble sequence may be configured for the terminal device. Optionally, the transmission period may be configured by the base station; and optionally, the transmission period may be a period of the time-frequency resource RO.

[0121] It should be noted that the terminal device can send the preamble sequence of the candidate cell to all candidate cells. The terminal device can also send the preamble sequence of the candidate cell to the candidate cell only when the beam measurement result of the candidate cell meets certain conditions.

[0122] For example, the terminal device will send the preamble sequence of the candidate cell to the candidate cell only if the best beam measurement result of the candidate cell is greater than the best beam measurement result of the source cell + the offset value offset; the terminal device will send the preamble sequence of the candidate cell to the candidate cell only if the average value of the beam measurement results of the candidate cell is greater than the average value of the beam measurement results of the source cell + the offset value; the terminal device will send the preamble sequence of the candidate cell to the candidate cell only if the average value or maximum value of the beam measurement results of the candidate cell is greater than the beam measurement threshold of the candidate cell; the terminal device will send the preamble sequence of the candidate cell to the candidate cell only if the top N best measurement results are the measurement results of the candidate cell.

[0123] S502: Measure the TA from the terminal device to the candidate cell according to the preamble sequence.

[0124] S503: Indicate or update the TA of the candidate cell to the terminal device.

[0125] For a detailed description of steps S502 to S503, please refer to the relevant contents in the embodiments of the present application, which will not be repeated here. In the embodiment of the present application, the preamble sequence periodically sent by the receiving terminal device is received, and the TA of the candidate cell is measured according to the preamble sequence. In the present application, before performing an inter-cell handover, the TA value of the user to each candidate cell can be measured in advance, and the TA value of each candidate cell can be indicated or updated for the user. When performing an inter-cell handover, the target cell can be accessed faster, reducing the time overhead of the handover.

[0126] Please refer to Figure 6, which is a flow chart of a method for measuring a timing advance TA provided in an embodiment of the present application. The method for measuring a timing advance TA is executed by a network device. The method for measuring a timing advance TA includes but is not limited to the following steps:

[0127] S601, triggering a terminal device to perform random access, and receiving a preamble sequence sent by the terminal device during the triggered random access process.

[0128] Optionally, a physical downlink control channel PDCCH order may be used to periodically trigger the terminal device to perform random access to send a preamble sequence.

[0129] Optionally, the PDCCH order may be reused to trigger the terminal device to perform random access for the first time to send a preamble sequence, and then the preamble sequence periodically sent by the receiving terminal device may be received.

[0130] It should be noted that the status information of the terminal device can also be monitored, and whether TA measurement needs to be re-performed can be determined based on the status information of the terminal device. If it is determined that TA measurement needs to be re-performed, the terminal device is triggered to perform random access to send the preamble sequence.

[0131] Optionally, after the PDCCH order is reused to trigger the terminal device to perform random access for the first time to send a preamble sequence, the status information of the terminal device is monitored, and whether the TA measurement needs to be performed again is determined according to the status information of the terminal device.

[0132] For example, the location information and speed information of the terminal device can be monitored to determine whether TA measurement needs to be re-performed, thereby triggering the terminal device to perform random access.

[0133] Furthermore, when it is determined that the TA measurement needs to be re-performed, the PDCCH order is reused to trigger the terminal device to perform random access to send the preamble sequence.

[0134] Optionally, radio resource control (RRC) signaling configures non-contention-based random access resources for each candidate cell, where the random access resources include RO resources and preamble sequences.

[0135] S602: Measure the TA from the terminal device to the candidate cell according to the preamble sequence.

[0136] S603: Indicate or update the TA of the candidate cell to the terminal device.

[0137] For a detailed description of steps S602 to S603 , please refer to the relevant contents in the embodiments of this application, which will not be repeated here.

[0138] In an embodiment of the present application, a terminal device is triggered to perform random access, and a preamble sequence sent by the terminal device during the triggered random access process is received. In the present application, the TA value of the user to each candidate cell can be pre-measured before inter-cell switching, and the TA value of each candidate cell can be indicated or updated for the user. When inter-cell switching is performed, the target cell can be accessed more quickly, reducing the time overhead of switching.

[0139] Please refer to Figure 7, which is a flow chart of a method for measuring a timing advance TA provided in an embodiment of the present application. The method for measuring a timing advance TA is executed by a terminal device. The method for measuring a timing advance TA includes but is not limited to the following steps:

[0140] S701, sending target information of a candidate cell to a network device, where the target information is used to measure the TA from the terminal device to the candidate cell.

[0141] It should be noted that the network device can be the network device of the source cell. The network device will maintain multiple candidate cells for the terminal device. When a cell handover is required, one of the multiple candidate cells will be selected as the target cell. However, the TA values ​​of the user to each source cell and the candidate cell may be different. When handing over to a cell with a different TA, random access is required to synchronize to the target cell, resulting in a corresponding increase in the time overhead when accessing the target cell. Therefore, the TA values ​​of the terminal device to each candidate cell can be obtained in advance so that the target cell can be accessed as soon as possible during handover.

[0142] Optionally, the terminal device may send a preamble sequence of the candidate cell to the network device, where the preamble sequence is used to measure the TA of the candidate cell, that is, the target information is the preamble sequence of the candidate cell.

[0143] In an embodiment of the present application, when sending target information to the network device corresponding to the candidate cell, a preamble sequence can be periodically sent to the network device; optionally, a random access trigger request sent by the network device can be received, and a preamble sequence can be sent during the triggered random access process.

[0144] Optionally, the terminal device may send an SRS to the network device. The SRS is used to measure the TA from the terminal device to the candidate cell, that is, the target information is the SRS.

[0145] In an embodiment of the present application, SRS information may be configured for a terminal device in a source cell, and the SRS information is used to determine a reception time-frequency position of the SRS, and the reception time-frequency position is used for a network device in a candidate cell to receive the SRS.

[0146] S702: Receive information indicating or updating the TA of a candidate cell sent by a network device.

[0147] Optionally, a random access response sent by a network device may be received, where the random access response carries information indicating or updating the TA of the candidate cell.

[0148] In an embodiment of the present application, when the TA of the candidate cell is indicated or updated for the first time, the TA of the candidate cell is indicated or updated, and when the TA of the candidate cell is not indicated or updated for the first time, the adjustment amount of the TA of the candidate cell is indicated or updated.

[0149] Optionally, in the case of indicating or updating the TA of the candidate cell for the first time, a random access response sent by the network device of the candidate cell may be received, where the random access response carries information indicating or updating the TA.

[0150] For example, when indicating or updating the TA of a candidate cell for the first time, the TA can be updated through the MAC CE, wherein the MAC CE contains at least the candidate cell identifier, and the indication field is 12 bits for indicating the TA value, so as to indicate or update the TA of the candidate cell to the terminal device through a random access response.

[0151] For example, when it is not the first time to indicate or update the TA of the candidate cell, the network device may configure the adjustment amount of the TA of the candidate cell to the terminal device through RRC configuration information.

[0152] In an embodiment of the present application, target information corresponding to a candidate cell is sent to a network device. The target information is used to measure the TA of the terminal device to the candidate cell and receive information indicating or updating the TA. In the present application, the TA value of the user to each candidate cell can be pre-measured before an inter-cell handover, and the TA value of each candidate cell can be indicated or updated for the user. When performing an inter-cell handover, the target cell can be accessed more quickly, reducing the time overhead of the handover.

[0153] Please refer to Figure 8, which is a flow chart of a method for measuring a timing advance TA provided in an embodiment of the present application. The method for measuring a timing advance TA is executed by a terminal device. The method for measuring a timing advance TA includes but is not limited to the following steps:

[0154] S801: Send a preamble sequence of a candidate cell to a network device. The preamble sequence is used to measure the TA of the candidate cell.

[0155] Optionally, the network device may be a network device of a source cell.

[0156] Optionally, a preamble sequence may be periodically sent to the network device.

[0157] In an embodiment of the present application, a sending period for sending a preamble sequence configured by a network device may be received.

[0158] In an embodiment of the present application, optionally, a preamble sequence corresponding to each candidate cell is sent to the network device of each candidate cell; optionally, a target candidate cell that meets preset conditions can be selected from the candidate cells of the terminal device, and a corresponding preamble sequence is sent to the target candidate cell.

[0159] It should be noted that the preamble sequence is sent to the network device corresponding to the candidate cell on the preconfigured RO resources.

[0160] Optionally, the preamble sequence may be sent on the best beam of the candidate cell through preconfigured RO resources.

[0161] In an embodiment of the present disclosure, beam measurement results of a candidate cell may be obtained, and the best beam of the candidate cell may be determined based on the beam measurement results. A preamble sequence may be sent in the best beam of the candidate cell through RO resources, and multiple beams of the candidate cell may correspond to RO resources.

[0162] Optionally, first RRC configuration information sent by the network device is received, beam measurement results of the candidate cell are obtained according to the first RRC configuration information, and the optimal beam is determined based on the beam measurement results.

[0163] In an embodiment of the present disclosure, it is possible to determine multiple candidate RO resources pre-configured for a terminal device for a candidate cell, wherein the multiple candidate RO resources correspond to multiple beams of the candidate cell, and receive a target RO resource selected by the terminal device indicated by the network device. Based on the correspondence between the multiple candidate RO resources and the multiple beams of the candidate cell, the beam corresponding to the target RO resource is determined, the corresponding beam is used as the target beam of the candidate cell, the target beam is used as the optimal beam, and a preamble sequence is sent on the target beam through the target RO resource.

[0164] Optionally, second RRC configuration information sent by the network device can be received, where the second RRC configuration information is used to indicate at least one of multiple candidate RO resources and / or multiple candidate preamble sequences preconfigured by the candidate cell for the terminal device, where the multiple candidate preamble sequences correspond to the multiple candidate RO resources.

[0165] It should be noted that the preamble sequence of the candidate cell can be sent to each candidate cell, and a target candidate cell that meets the preset conditions can be selected from the candidate cells of the terminal device, and the corresponding preamble sequence can be sent to the target candidate cell. Regarding the specific process of the terminal device selecting the target candidate cell that meets the preset conditions, please refer to the relevant content of the above embodiment, which will not be repeated here.

[0166] Optionally, a random access trigger request sent by a network device is received, and a preamble sequence is sent during the triggered random access process.

[0167] Optionally, a PDCCH order periodically sent by a network device may be received, where the PDCCH order is used to trigger a terminal device to perform random access. Optionally, a PDCCH order periodically sent to a network device after a preamble sequence is sent once during a random access process may be received, where the PDCCH order is used to trigger a terminal device to perform random access.

[0168] Optionally, a PDCCH order sent by a receiving network device is sent, and a preamble sequence is sent once during the random access process. When the network device determines that TA measurement needs to be re-performed, the PDCCH order sent by the receiving network device is received again to trigger the terminal device to send the preamble sequence again during the random access process.

[0169] In an embodiment of the present application, when the PDCCH order only indicates triggering random access, the RO resource corresponding to the candidate cell is determined from the candidate RO resources pre-configured by the candidate cell, and the preamble sequence corresponding to the candidate cell is determined from the candidate preamble sequence, and the corresponding preamble sequence is sent to the network device on the RO resource corresponding to the candidate cell.

[0170] Furthermore, the cell identifier of the candidate cell requiring random access can be determined from the indication field of the PDCCH order, and at least one of the corresponding RO resources, preamble sequence and transmit beam information of the candidate cell requiring random access can also be determined from the indication field of the PDCCH order.

[0171] S802: Receive an instruction sent by a network device or information about updating the TA.

[0172] For a detailed description of step S802, please refer to the relevant contents in the embodiments of this application, which will not be repeated here.

[0173] In an embodiment of the present application, a preamble sequence of a candidate cell is sent to a network device. The preamble sequence is used to measure the TA of the candidate cell and receive information indicating or updating the TA of the candidate cell. In the present application, the TA value of the user to each candidate cell can be pre-measured before an inter-cell handover, and the TA value of each candidate cell can be indicated or updated for the user. During an inter-cell handover, access to the target cell can be accelerated, reducing handover time overhead.

[0174] Please refer to Figure 9, which is a flow chart of a method for measuring a timing advance TA provided in an embodiment of the present application. The method for measuring a timing advance TA is executed by a terminal device. The method for measuring a timing advance TA includes but is not limited to the following steps:

[0175] S901, sending an SRS to a network device, where the SRS is used to measure the TA from the terminal device to the candidate cell.

[0176] Optionally, SRS information sent by a network device may be received, where the SRS information may indicate the receiving time-frequency position of the SRS corresponding to the candidate cell. Furthermore, after determining the receiving time-frequency position of the SRS corresponding to the candidate cell based on the SRS information, the terminal device may determine the sending time-frequency position of the SRS based on the receiving time-frequency position, and send the SRS to the network device at the time-frequency position.

[0177] Optionally, based on the SRS information, the SRS transmission period and the TA measurement period of the candidate cell can be determined. The terminal device can send the SRS to the network device according to the SRS transmission period. The process of determining the TA measurement period can be found in the relevant content of the above embodiment and will not be repeated here.

[0178] S902: Receive information indicating or updating the TA of a candidate cell sent by a network device.

[0179] For a detailed description of step S902, please refer to the relevant contents in the embodiments of this application, which will not be repeated here.

[0180] In an embodiment of the present application, an SRS is sent to a network device. The SRS is used to measure the TA of a terminal device to a candidate cell and receive information indicating or updating the TA. In the present application, the TA value of the user to each candidate cell can be pre-measured before an inter-cell handover, and the TA value of each candidate cell can be indicated or updated for the user. When performing an inter-cell handover, the target cell can be accessed more quickly, reducing the time overhead of the handover.

[0181] In the embodiments provided above, the methods provided in the embodiments of the present application are described from the perspectives of network devices and terminal devices, respectively. In order to implement the various functions in the methods provided in the embodiments of the present application, the network devices and terminal devices may include hardware structures and software modules, and the aforementioned functions may be implemented in the form of hardware structures, software modules, or hardware structures plus software modules. A particular function among the aforementioned functions may be implemented in the form of hardware structures, software modules, or hardware structures plus software modules.

[0182] The communication device 1000 may be a terminal device (such as the terminal device in the aforementioned method embodiment), or a device in a terminal device, or a device that can be used in conjunction with a terminal device. Alternatively, the communication device 1000 may be a network device, or a device in a network device, or a device that can be used in conjunction with a network device.

[0183] The communication device 1000 is a network device (such as the network device in the aforementioned method embodiment):

[0184] The processing module 101 is configured to measure a TA from the terminal device to a candidate cell based on target information sent by the terminal device;

[0185] The processing module 102 is configured to indicate or update the TA of the candidate cell to the terminal device.

[0186] Optionally, the transceiver module 101 is further configured to receive a preamble sequence of the candidate cell sent by the terminal device; and measure a TA from the terminal device to the candidate cell according to the preamble sequence.

[0187] Optionally, the transceiver module 101 is further configured to receive a sounding reference signal SRS of the candidate cell sent by the terminal device; and measure the TA from the terminal device to the candidate cell according to the SRS.

[0188] Optionally, the transceiver module 101 is further configured to receive the preamble sequence periodically sent by the terminal device; or trigger the terminal device to perform random access and receive the preamble sequence sent by the terminal device during the triggered random access process.

[0189] Optionally, the transceiver module 101 is further configured to receive a preamble sequence sent by the terminal device on the randomly accessed time-frequency RO resource.

[0190] Optionally, the transceiver module 101 is further configured to receive a preamble sequence sent by the terminal device in the best beam of the candidate cell through the RO resource.

[0191] Optionally, the transceiver module 101 is further used to determine that the candidate cell is an RO resource pre-configured by the terminal device, and the multiple beams of the candidate cell all correspond to the RO resource; receive the preamble sequence sent by the terminal device through the target RO resource on the target beam corresponding to the target RO resource, the target RO resource being the RO resource selected from the preconfigured multiple RO resources, and the target beam being the optimal beam.

[0192] Optionally, the transceiver module 101 is further used to determine that the candidate cell is a plurality of RO resources pre-configured for the terminal device, wherein the plurality of RO resources correspond to the plurality of beams of the candidate cell; and receive a preamble sequence sent by the terminal device through the target RO resource on a target beam corresponding to the target RO resource, wherein the target RO resource is an RO resource selected from the plurality of pre-configured RO resources, and the target beam is the optimal beam.

[0193] Optionally, the transceiver module 101 is also used to send first radio resource control RRC configuration information to the terminal device, where the first RRC configuration information is used to instruct the terminal device to obtain the beam measurement result of the candidate cell, and the beam measurement result is used to determine the optimal beam.

[0194] Optionally, the transceiver module 101 is also used to send second RRC configuration information to the terminal device, where the second RRC configuration information is used to indicate at least one of the multiple RO resources and / or multiple preamble sequences preconfigured by the candidate cell for the terminal device, and the multiple preamble sequences correspond to the multiple RO resources.

[0195] Optionally, the transceiver module 101 is also used to multiplex the physical downlink control channel PDCCH order to periodically trigger the terminal device to perform random access to send the preamble sequence; or, after multiplexing the PDCCH order to trigger the terminal device to perform random access for the first time to send the preamble sequence, receive the preamble sequence periodically sent by the terminal device; or, after multiplexing the PDCCH order to trigger the terminal device to perform random access for the first time to send the preamble sequence, monitor the status information of the terminal device, and determine whether it is necessary to re-perform TA measurement based on the status information of the terminal device; if it is determined that TA measurement is required to be re-performed, multiplex the PDCCH order again to trigger the terminal device to perform random access to send the preamble sequence.

[0196] Optionally, the processing module 102 is also used to indicate to the terminal device through the PDCCH order the cell identifier of the candidate cell that needs to be randomly accessed; and / or to indicate to the terminal device through the PDCCH order at least one of the RO, preamble sequence and transmit beam information corresponding to the candidate cell that needs to be randomly accessed.

[0197] Optionally, the transceiver module 102 is further configured to configure a sending period of the preamble sequence to the terminal device.

[0198] Optionally, the transceiver module 101 is further used to configure SRS information for the terminal device, wherein the SRS information is used to indicate the receiving time-frequency position of the SRS corresponding to the candidate cell; and receive the SRS sent by the terminal device at the receiving time-frequency position.

[0199] Optionally, the transceiver module 101 is further configured to obtain a transmission period of the SRS from the SRS information, and receive the SRS based on the transmission period of the SRS.

[0200] Optionally, the processing module 102 is further configured to indicate or update the TA of the candidate cell to the terminal device through a random access response.

[0201] Optionally, the processing module 102 is also used to indicate or update the TA of the candidate cell to the terminal device when the TA of the candidate cell is indicated or updated for the first time; and to indicate or update the adjustment amount of the TA of the candidate cell to the terminal device when it is not the first time to indicate or update the TA of the candidate cell.

[0202] Optionally, the processing module 102 is further configured to indicate or update the TA of the candidate cell to the terminal device through a random access response when the TA of the candidate cell is indicated or updated for the first time.

[0203] The communication device 1000 is a terminal device:

[0204] The transceiver module 101 is configured to send target information corresponding to a candidate cell to a network device, where the target information is used to measure the TA from the terminal device to the candidate cell;

[0205] The processing module 102 is configured to receive information indicating or updating the TA of the candidate cell sent by the network device.

[0206] The transceiver module 101 is further configured to send a preamble sequence of the candidate cell to the network device, where the preamble sequence is used to measure the TA of the candidate cell.

[0207] The transceiver module 101 is further used to send an SRS to the network device, where the SRS is used to measure the TA from the terminal device to the candidate cell.

[0208] The transceiver module 101 is further configured to periodically send the preamble sequence to the network device; or receive a random access trigger request sent by the network device, and send the preamble sequence during the triggered random access process.

[0209] The transceiver module 101 is further configured to send the preamble sequence of the candidate cell to the network device; or, select a target candidate cell that meets preset conditions from the candidate cells of the terminal device, and send the preamble sequence to the target candidate cell to the network device.

[0210] The transceiver module 101 is further configured to send the preamble sequence to the network device on a preconfigured RO resource.

[0211] The transceiver module 101 is further configured to send the preamble sequence on the best beam of the candidate cell through the preconfigured RO resource.

[0212] The transceiver module 101 is further used to obtain a beam measurement result of the candidate cell; determine the best beam of the candidate cell according to the beam measurement result; and send the preamble sequence to the network device through the RO resource in the best beam of the candidate cell, wherein the multiple beams of the candidate cell all correspond to the RO resource.

[0213] The transceiver module 101 is further configured to determine a plurality of RO resources pre-configured for the terminal device by the candidate cell, wherein the plurality of RO resources correspond to a plurality of beams of the candidate cell; select an RO resource from the plurality of RO resources as a target RO resource selected by the terminal device; determine a target beam corresponding to the target RO resource based on a correspondence between the plurality of RO resources and the plurality of beams of the candidate cell, the target beam being the optimal beam; and send the preamble sequence on the target beam through the target RO resource.

[0214] The transceiver module 101 is further used to receive first RRC configuration information sent by the network device; obtain the beam measurement result of the candidate cell according to the first RRC configuration information, and determine the optimal beam based on the beam measurement result.

[0215] The transceiver module 101 is further used to receive second RRC configuration information sent by the network device, where the second RRC configuration information is used to indicate at least one of the multiple candidate RO resources and / or multiple candidate preamble sequences preconfigured by the candidate cell for the terminal device, and the multiple candidate preamble sequences correspond to the multiple candidate RO resources.

[0216] The transceiver module 101 is also used to receive the PDCCH order periodically sent by the network device, where the PDCCH order is used to trigger the terminal device to perform random access; or, receive the PDCCH order sent by the network device, and after sending the preamble sequence once during the random access process, periodically send the preamble sequence to the network device; or, receive the PDCCH order sent by the network device, and send the preamble sequence once during the random access process; when the network device determines that TA measurement needs to be re-performed, receive the PDCCH order sent again by the network device to trigger the terminal device to send the preamble sequence again during the random access process.

[0217] The processing module 102 is also used to determine the cell identifier of the candidate cell that needs to be randomly accessed from the indication field of the PDCCH order; and / or, to determine at least one of the corresponding RO, preamble sequence and transmit beam information of the candidate cell that needs to be randomly accessed from the indication field of the PDCCH order.

[0218] The processing module 102 is further configured to, when the PDCCH order only indicates triggering random access, determine the RO resource corresponding to the candidate cell from the candidate RO resources preconfigured by the candidate cell, and determine the preamble sequence corresponding to the candidate cell from the candidate preamble sequence; and send the corresponding preamble sequence to the network device on the RO resource corresponding to the candidate cell.

[0219] The transceiver module 101 is further configured to receive a sending period for sending the preamble sequence configured by the network device.

[0220] The transceiver module 101 is further configured to receive SRS information configured by the network device, determine a receiving time-frequency position of the SRS corresponding to the candidate cell according to the SRS information, and send the SRS to the network device according to the receiving time-frequency position.

[0221] The SRS configuration information includes a transmission period of the SRS.

[0222] The transceiver module 101 is further configured to receive a random access response sent by the network device of the candidate cell, where the random access response carries the information indicating or updating the TA.

[0223] The transceiver module 101 is further configured to receive an indication or update of the TA of the candidate cell when the TA of the candidate cell is indicated or updated for the first time; and receive an indication or update of an adjustment amount of the TA of the candidate cell when the TA of the candidate cell is not indicated or updated for the first time.

[0224] The transceiver module 101 is further configured to receive a random access response sent by a network device of the candidate cell when the TA of the candidate cell is indicated or updated for the first time, where the random access response carries information indicating or updating the TA.

[0225] In an embodiment of the present application, based on the target information sent by the terminal device, the TA between the terminal device and the candidate cell is measured, and the TA of the candidate cell is indicated or updated to the terminal device. In the present application, the TA value of the user to each candidate cell can be pre-measured before inter-cell handover, and the TA value of each candidate cell can be indicated or updated for the user. When performing inter-cell handover, the target cell can be accessed more quickly, reducing the time overhead of handover.

[0226] Please refer to Figure 11, which is a schematic diagram of the structure of another communication device 2000 provided in an embodiment of the present application. Communication device 2000 can be a network device, or a terminal device (such as the first terminal device in the aforementioned method embodiment), or a chip, chip system, or processor that supports a network device to implement the aforementioned method, or a chip, chip system, or processor that supports a terminal device to implement the aforementioned method. This device can be used to implement the method described in the aforementioned method embodiment, and for details, please refer to the description of the aforementioned method embodiment.

[0227] The communication device 2000 may include one or more processors 2001. The processor 2001 may be a general-purpose processor or a dedicated processor. For example, it may be a baseband processor or a central processing unit. The baseband processor may be used to process communication protocols and communication data, and the central processing unit may be used to control the communication device (e.g., a base station, a baseband chip, a terminal device, a terminal device chip, a DU or CU, etc.), execute computer programs, and process computer program data.

[0228] Optionally, the communication device 2000 may further include one or more memories 2002, on which a computer program 2004 may be stored. The processor 2002 executes the computer program 2004 to cause the communication device 2000 to perform the method described in the above method embodiment. Optionally, the memory 2002 may also store data. The communication device 2000 and the memory 2002 may be provided separately or integrated together.

[0229] Optionally, the communication device 2000 may further include a transceiver 2005 and an antenna 2006. The transceiver 2005 may be referred to as a transceiver unit, a transceiver, or a transceiver circuit, and is configured to implement transceiver functions. The transceiver 2005 may include a receiver and a transmitter. The receiver may be referred to as a receiver or a receiving circuit, and is configured to implement a receiving function; the transmitter may be referred to as a transmitter or a transmitting circuit, and is configured to implement a transmitting function.

[0230] Optionally, the communication device 2000 may further include one or more interface circuits 2007. The interface circuit 2007 is configured to receive code instructions and transmit the code instructions to the processor 2002. The processor 2002 executes the code instructions to enable the communication device 2000 to perform the method described in the above method embodiment.

[0231] In one implementation, processor 2002 may include a transceiver for implementing receiving and transmitting functions. For example, the transceiver may be a transceiver circuit, an interface, or an interface circuit. The transceiver circuit, interface, or interface circuit for implementing the receiving and transmitting functions may be separate or integrated. The transceiver circuit, interface, or interface circuit may be used for reading and writing code / data, or may be used for transmitting or delivering signals.

[0232] In one implementation, processor 2002 may store a computer program 1003. Computer program 1003 runs on processor 1001, enabling communication device 1000 to perform the method described in the above method embodiment. Computer program 1003 may be embedded in processor 1001, in which case processor 1001 may be implemented by hardware.

[0233] In one implementation, the communication device 2000 may include a circuit that can implement the functions of sending, receiving, or communicating in the aforementioned method embodiments. The processor and transceiver described in this application can be implemented on an integrated circuit (IC), an analog IC, a radio frequency integrated circuit RFIC, a mixed signal IC, an application specific integrated circuit (ASIC), a printed circuit board (PCB), an electronic device, etc. The processor and transceiver can also be manufactured using various IC process technologies, such as complementary metal oxide semiconductor (CMOS), N-type metal oxide semiconductor (nMetal-oxide-semiconductor, NMOS), P-type metal oxide semiconductor (positive channel metal oxide semiconductor, PMOS), bipolar junction transistor (bipolar junction transistor, BJT), bipolar CMOS (BiCMOS), silicon germanium (SiGe), gallium arsenide (GaAs), etc.

[0234] The communication device described in the above embodiment may be a network device or a terminal device (such as the first terminal device in the aforementioned method embodiment), but the scope of the communication device described in this application is not limited thereto, and the structure of the communication device may not be limited to Figure 11. The communication device may be an independent device or may be part of a larger device. For example, the communication device may be:

[0235] (1) An independent integrated circuit (IC), or chip, or chip system or subsystem;

[0236] (2) a collection of one or more ICs, optionally including a storage component for storing data and computer programs;

[0237] (3) ASIC, such as modem;

[0238] (4) Modules that can be embedded in other devices;

[0239] (5) Receivers, terminal devices, intelligent terminal devices, cellular phones, wireless devices, handheld devices, mobile units, vehicle-mounted devices, network devices, cloud devices, artificial intelligence devices, etc.;

[0240] (6)Others, etc.

[0241] If the communication device can be a chip or a chip system, please refer to the schematic diagram of the chip structure shown in Figure 12. The chip shown in Figure 12 includes a processor 111 and an interface 112. The number of processors 111 can be one or more, and the number of interfaces 112 can be multiple.

[0242] Optionally, the chip further includes a memory 113, which is used to store necessary computer programs and data.

[0243] The chip is used to implement the functions of any of the above method embodiments when executed.

[0244] Those skilled in the art will also appreciate that the various illustrative logical blocks and steps listed in the embodiments of the present application can be implemented by electronic hardware, computer software, or a combination of both. Whether such functions are implemented by hardware or software depends on the specific application and the design requirements of the entire system. Those skilled in the art may use various methods to implement the described functions for each specific application, but such implementation should not be construed as exceeding the scope of protection of the embodiments of the present application.

[0245] An embodiment of the present application also provides a system for measuring timing advance TA, which includes a communication device as a terminal device (such as the terminal device in the aforementioned method embodiment) in the embodiment of Figure 10 and a communication device as a network device, or the system includes a communication device as a terminal device (such as the terminal device in the aforementioned method embodiment) in the embodiment of Figure 11 and a communication device as a network device.

[0246] The present application also provides a readable storage medium having instructions stored thereon, which implement the functions of any of the above method embodiments when executed by a computer.

[0247] The present application also provides a computer program product, which implements the functions of any of the above method embodiments when executed by a computer.

[0248] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer programs. When the computer program is loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer program can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer program can be transmitted from one website, computer, server or data center to another website, computer, server or data center via a wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) method. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server or data center that includes one or more available media integrated. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a high-density digital video disc (DVD)), or a semiconductor medium (eg, a solid state disk (SSD)).

[0249] Those skilled in the art will understand that the various numerical numbers such as first and second involved in this application are only for the convenience of description and are not used to limit the scope of the embodiments of this application, and also indicate the order of precedence.

[0250] In this application, at least one can also be described as one or more, and multiple can be two, three, four or more, which is not limited in this application. In the embodiments of this application, for a technical feature, the technical features in the technical feature are distinguished by "first", "second", "third", "A", "B", "C" and "D", and there is no order of precedence or size between the technical features described by "first", "second", "third", "A", "B", "C" and "D".

[0251] The correspondences shown in the tables in this application can be configured or predefined. The values ​​of the information in each table are only examples and can be configured to other values, which are not limited by this application. When configuring the correspondence between information and various parameters, it is not necessarily required to configure all the correspondences shown in each table. For example, in the tables in this application, the correspondences shown in certain rows may not be configured. For another example, appropriate modifications and adjustments can be made based on the above tables, such as splitting, merging, etc. The names of the parameters shown in the titles of the above tables can also use other names that can be understood by the communication device, and the values ​​or representations of the parameters can also use other values ​​or representations that can be understood by the communication device. When implementing the above tables, other data structures can also be used, such as arrays, queues, containers, stacks, linear lists, pointers, linked lists, trees, graphs, structures, classes, heaps, hash tables or hash tables, etc.

[0252] The predefined in this application may be understood as defined, predefined, stored, pre-stored, pre-negotiated, pre-configured, solidified, or pre-burned.

[0253] Those skilled in the art will appreciate that the units and algorithm steps of each example 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 performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0254] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0255] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A method for measuring timing advance (TA), characterized in that: Executed by a network device, the method includes: Based on the target information sent by the terminal device, measuring the TA of the terminal device to the candidate cell; Indicate or update the TA of the candidate cell to the terminal device.

2. The method according to claim 1, characterized in that The measuring the TA between the terminal device and the candidate cell based on the target information sent by the terminal device includes: Receiving a preamble sequence of the candidate cell sent by the terminal device; The TA from the terminal device to the candidate cell is measured according to the preamble sequence.

3. The method according to claim 1, characterized in that The measuring the TA between the terminal device and the candidate cell based on the target information sent by the terminal device includes: receiving a sounding reference signal SRS of the candidate cell sent by the terminal device; According to the SRS, the TA from the terminal device to the candidate cell is measured.

4. The method according to claim 2, characterized in that The receiving a preamble sequence of the candidate cell sent by the terminal device includes: receiving a preamble sequence of the candidate cell periodically sent by the terminal device; or, Trigger the terminal device to perform random access, and receive the candidate cell preamble sequence sent by the terminal device during the triggered random access process.

5. The method according to claim 2 or 4, characterized in that The method further comprises: Receive the preamble sequence of the candidate cell sent by the terminal device on the random access time-frequency RO resource.

6. The method according to claim 5, characterized in that The method further comprises: Receive a preamble sequence of the candidate cell sent by the terminal device through the RO resource in the best beam of the candidate cell.

7. The method according to claim 6, characterized in that The receiving a preamble sequence of the candidate cell sent by the terminal device through the RO resource on the best beam of the candidate cell includes: Determining that the candidate cell is an RO resource preconfigured by the terminal device, and multiple beams of the candidate cell all correspond to the RO resource; Receive a preamble sequence of the candidate cell sent by the terminal device through the RO resource on the best beam, wherein the best beam is determined according to a beam measurement result of the candidate cell.

8. The method according to claim 6, characterized in that The receiving a preamble sequence of the candidate cell sent by the terminal device through the RO resource on the best beam of the candidate cell includes: Determining that the candidate cell is a plurality of RO resources preconfigured by the terminal device, wherein the plurality of RO resources correspond to a plurality of beams of the candidate cell; Receive the preamble sequence of the candidate cell sent by the terminal device through the target RO resource on the target beam corresponding to the target RO resource, where the target RO resource is an RO resource selected from the preconfigured multiple RO resources, and the target beam is the optimal beam.

9. The method according to claim 7, characterized in that The method further comprises: Send first radio resource control RRC configuration information to the terminal device, where the first RRC configuration information is used to instruct the terminal device to obtain the beam measurement result of the candidate cell, and the beam measurement result is used to determine the optimal beam.

10. The method according to claim 8, characterized in that The method further comprises: Second RRC configuration information is sent to the terminal device, where the second RRC configuration information is used to indicate at least one of multiple RO resources and / or multiple preamble sequences preconfigured for the terminal device, where the multiple preamble sequences correspond to the multiple RO resources.

11. The method according to claim 4, characterized in that The method further comprises: Multiplexing a physical downlink control channel PDCCH order to periodically trigger the terminal device to perform random access to send the preamble sequence of the candidate cell; or, After the terminal device is first triggered to perform random access by multiplexing the PDCCH order to send the preamble sequence of the candidate cell, the preamble sequence of the candidate cell periodically sent by the terminal device is received; or After reusing the PDCCH order to trigger the terminal device to perform random access for the first time to send the preamble sequence of the candidate cell, monitoring the status information of the terminal device, and determining whether it is necessary to re-perform TA measurement according to the status information of the terminal device; When it is determined that the TA measurement needs to be performed again, the PDCCH order is reused to trigger the terminal device to perform random access to send the preamble sequence of the candidate cell.

12. The method according to claim 11, characterized in that The method further comprises: Indicating to the terminal device, via the PDCCH order, the cell identity of the candidate cell to be randomly accessed; and / or The PDCCH order indicates to the terminal device at least one of the RO, preamble sequence and transmit beam information corresponding to the candidate cell that needs to be randomly accessed.

13. The method according to claim 2, characterized in that The method further comprises: The sending period of the preamble sequence of the candidate cell is configured to the terminal device.

14. The method according to claim 3, characterized in that The receiving the SRS of the candidate cell sent by the terminal device includes: Configuring SRS information for the terminal device, wherein the SRS information is used to indicate a reception time-frequency position of the SRS corresponding to the candidate cell; The SRS sent by the terminal device is received at the receiving time-frequency position.

15. The method according to claim 3 or 14, characterized in that The method further comprises: The transmission period of the SRS is acquired from the SRS information, and the SRS is received based on the transmission period of the SRS.

16. The method according to claim 1, wherein The indicating or updating the TA of the candidate cell to the terminal device includes: The TA of the candidate cell is indicated or updated to the terminal device through a random access response.

17. The method according to claim 1, wherein The method further comprises: In a case where the TA of the candidate cell is indicated or updated for the first time, indicating or updating the TA of the candidate cell to the terminal device; When it is not the first time to indicate or update the TA of the candidate cell, the adjustment amount of the TA of the candidate cell is indicated or updated to the terminal device.

18. The method according to claim 1, wherein The indicating or updating the TA of the candidate cell to the terminal device includes: In case that the TA of the candidate cell is indicated or updated for the first time, the TA of the candidate cell is indicated or updated to the terminal device through a random access response.

19. A method for measuring timing advance (TA), characterized in that: Executed by a terminal device, the method includes: Sending target information corresponding to a candidate cell to a network device, where the target information is used to measure a TA from the terminal device to the candidate cell; Receive information indicating or updating the TA of the candidate cell sent by the network device.

20. The method according to claim 19, wherein The sending target information corresponding to the candidate cell to the network device includes: A preamble sequence of the candidate cell is sent to the network device, where the preamble sequence is used to measure the TA of the candidate cell.

21. The method according to claim 19, wherein The sending target information corresponding to the candidate cell to the network device includes: An SRS is sent to the network device, where the SRS is used to measure the TA from the terminal device to the candidate cell.

22. The method according to claim 20, characterized in that The sending the preamble sequence of the candidate cell to the network device includes: periodically sending the preamble sequence of the candidate cell to the network device; or, receiving a random access trigger request sent by the network device, and sending a preamble sequence of the candidate cell during the triggered random access process.

23. The method according to claim 22, characterized in that The periodically sending the preamble sequence of the candidate cell to the network device includes: sending the preamble sequence of the candidate cell to the network device; or, A target candidate cell that meets a preset condition is selected from the candidate cells of the terminal device, and the preamble sequence of the target candidate cell is sent to the network device.

24. The method according to claim 20, 22 or 23, characterized in that The method further comprises: The preamble sequence of the candidate cell is sent to the network device on a preconfigured RO resource.

25. The method according to claim 24, characterized in that The sending the preamble sequence of the candidate cell to the network device on the preconfigured RO resource includes: The preamble sequence of the candidate cell is sent on the best beam of the candidate cell through the preconfigured RO resource.

26. The method according to claim 25, characterized in that The sending the preamble sequence of the candidate cell by using the preconfigured RO resource on the best beam of the candidate cell includes: Obtaining a beam measurement result of the candidate cell; Determine the best beam of the candidate cell according to the beam measurement result; The best beam of the candidate cell sends the preamble sequence of the candidate cell to the network device through the RO resource, wherein multiple beams of the candidate cell all correspond to the RO resource.

27. The method according to claim 25, characterized in that The sending the preamble sequence of the candidate cell by using the preconfigured RO resource on the best beam of the candidate cell includes: Determining that the candidate cell is a plurality of RO resources preconfigured by the terminal device, wherein the plurality of RO resources correspond to a plurality of beams of the candidate cell; Selecting one RO resource from the multiple RO resources to be determined as a target RO resource selected by the terminal device; Determining a target beam corresponding to the target RO resource based on a correspondence between the multiple RO resources and the multiple beams of the candidate cells, where the target beam is the optimal beam; The preamble sequence of the candidate cell is sent on the target beam through the target RO resource.

28. The method according to claim 26, characterized in that The method further comprises: Receiving first RRC configuration information sent by the network device; According to the first RRC configuration information, a beam measurement result of the candidate cell is obtained, and the optimal beam is determined based on the beam measurement result.

29. The method according to claim 27, characterized in that The method further comprises: Receive second RRC configuration information sent by the network device, where the second RRC configuration information is used to indicate at least one of multiple candidate RO resources and / or multiple candidate preamble sequences preconfigured by the candidate cell for the terminal device, where the multiple candidate preamble sequences correspond to the multiple candidate RO resources.

30. The method according to claim 22, wherein The method further comprises: receiving a PDCCH order periodically sent by the network device, where the PDCCH order is used to trigger the terminal device to perform random access; or receiving the PDCCH order sent by the network device, and after sending the preamble sequence of the candidate cell once during a random access process, periodically sending the preamble sequence of the candidate cell to the network device; or, receiving the PDCCH order sent by the network device, and sending a preamble sequence of the candidate cell once during a random access process; In the case where the network device determines that the TA measurement needs to be re-performed, the PDCCH order re-sent by the network device is received to trigger the terminal device to re-send the preamble sequence of the candidate cell during the random access process.

31. The method according to claim 30, characterized in that The method further comprises: Determine the cell identifier of the candidate cell that needs to be randomly accessed from the indication field of the PDCCH order; and / or, At least one of the RO, preamble sequence, and transmit beam information corresponding to the candidate cell requiring random access is determined from the indication field of the PDCCH order.

32. The method according to claim 30, characterized in that The method further comprises: In a case where the PDCCH order only indicates triggering random access, determining the RO resource corresponding to the candidate cell from the candidate RO resources preconfigured by the candidate cell, and determining the preamble sequence corresponding to the candidate cell from the candidate preamble sequences; The preamble sequence of the corresponding candidate cell is sent to the network device on the RO resource corresponding to the candidate cell.

33. The method according to claim 20, wherein The method further comprises: Receive a sending period for sending a preamble sequence of the candidate cell configured by the network device.

34. The method according to claim 21, wherein The sending the SRS to the network device includes: Receiving SRS information configured by the network device; Determine a reception time-frequency position of the SRS corresponding to the candidate cell according to the SRS information; The SRS is sent to the network device according to the received time-frequency position.

35. The method according to claim 34, wherein The SRS information includes a transmission period of the SRS.

36. The method according to claim 19, wherein The receiving information indicating or updating the TA of the candidate cell includes: A random access response is received from the network device of the candidate cell, where the random access response carries the information indicating or updating the TA.

37. The method according to claim 36, wherein The method further comprises: In case that the TA of the candidate cell is indicated or updated for the first time, receiving an indication or update of the TA of the candidate cell; In a case where it is not the first time to indicate or update the TA of the candidate cell, an adjustment amount for indicating or updating the TA of the candidate cell is received.

38. The method according to claim 19, wherein The receiving information indicating or updating the TA of the candidate cell includes: In case that the TA of the candidate cell is indicated or updated for the first time, a random access response sent by the network device of the candidate cell is received, where the random access response carries information of indicating or updating the TA.

39. A communication device, characterized in that: include: a processing module, configured to measure a TA from the terminal device to a candidate cell based on target information sent by the terminal device; Indicate or update the TA of the candidate cell to the terminal device.

40. A communication device, characterized in that: include: a transceiver module, configured to send target information corresponding to a candidate cell to a network device, wherein the target information is used to measure a TA from the terminal device to the candidate cell; Receive information indicating or updating the TA of the candidate cell sent by the network device.

41. A communication device, characterized in that The device includes a processor and a memory, wherein a computer program is stored in the memory, and the processor executes the computer program stored in the memory to enable the device to perform the method according to any one of claims 1 to 18.

42. A communication device, characterized in that The device includes a processor and a memory, wherein a computer program is stored in the memory, and the processor executes the computer program stored in the memory to enable the device to perform the method as claimed in claims 19 to 38.

43. A communication device, characterized in that include: processor and interface circuits; The interface circuit is used to receive code instructions and transmit them to the processor; The processor is configured to run the code instructions to perform the method according to any one of claims 1 to 18.

44. A communication device, characterized in that include: processor and interface circuits; The interface circuit is used to receive code instructions and transmit them to the processor; The processor is configured to execute the code instructions to perform the method according to claims 19 to 38.

45. A computer-readable storage medium storing instructions, which, when executed, enable the method according to any one of claims 1 to 18 to be implemented.

46. ​​A computer-readable storage medium storing instructions which, when executed, cause the method of claims 19 to 38 to be implemented.

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