TA measurement method and device and storage medium

Abstract

The invention relates to a TA measurement method and device and a storage medium, and the method comprises the steps: determining whether to execute TA measurement based on the configuration of a network device, solving a problem of how to obtain a TA value based on the configuration of the network device, enabling a terminal to determine whether to obtain the TA value through the configuration of the network device, guaranteeing the accuracy of obtaining the TA value through the execution of the TA measurement, and improving the user experience. And thus, the reliability of communication based on the TA value is ensured.

Description

TA measurement method, apparatus, and storage medium TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of communication, and particularly relates to a TA (Timing Advance) measurement method, apparatus, and storage medium. BACKGROUND

[0002] With the rapid development of mobile communication technology, an LTM (L1 / L2 Triggered Mobility) based on conditional triggering is proposed to trigger cell switching when it is determined that the condition is met, so as to access a target cell and reduce the latency caused by mobility.

[0003] SUMMARY

[0004] The scheme provided by the present disclosure solves the problem of how to obtain a TA value based on the configuration of a network device, and the terminal determines whether to obtain the TA value based on the configuration of the network device, thereby ensuring the accuracy of TA measurement and obtaining the TA value, and further ensuring the reliability of uplink communication based on the TA value.

[0005] The present disclosure provides a TA measurement method, apparatus, and storage medium.

[0006] According to a first aspect of the present disclosure, a TA measurement method is provided, the method is executed by a terminal, and the method comprises: determining whether to perform TA measurement based on the configuration of a network device.

[0007] According to a second aspect of the present disclosure, a TA measurement method is provided, the method is executed by a network device, and the method comprises: sending a first message to a terminal, the first message being used to instruct the terminal to perform TA measurement.

[0008] According to a third aspect of the present disclosure, a TA measurement apparatus is provided, comprising: a transceiver module, configured to determine whether to perform TA measurement based on the configuration of a network device.

[0009] According to a fourth aspect of the present disclosure, a TA measurement apparatus is provided, comprising: a transceiver module, configured to send a first message to a terminal, the first message being used to instruct the terminal to perform TA measurement.

[0010] According to a fifth aspect of the present disclosure, a terminal is provided, comprising: one or more processors; wherein the terminal is configured to perform the method of any one of the first aspect.

[0011] According to a sixth aspect of the present disclosure, a network device is provided, comprising: one or more processors; wherein the network device is configured to perform the method of any one of the second aspect.

[0012] According to a seventh aspect of the embodiments of the present disclosure, a communication system is provided, comprising: a terminal, a network device, wherein the terminal is configured to implement the TA measurement method according to the first aspect, and the network device is configured to implement the TA measurement method according to the second aspect.

[0013] According to an eighth aspect of the embodiments of the present disclosure, a storage medium is provided, which stores instructions, when the instructions run on a communication device, cause the communication device to execute the method according to any one of the first aspect and the second aspect. BRIEF DESCRIPTION OF DRAWINGS

[0014] The accompanying drawings, which are included to provide a further understanding of the embodiments of the present disclosure and constitute a part of the present disclosure, illustrate embodiments of the present disclosure and explain the principles of the present disclosure, and do not constitute improper limitations on the present disclosure. In the drawings:

[0015] FIG. 1 is a schematic diagram of an architecture of a communication system according to an embodiment of the present disclosure;

[0016] FIG. 2A is an interaction schematic diagram of a TA measurement method according to an embodiment of the present disclosure;

[0017] FIG. 2B is a schematic diagram of TA measurement time according to an embodiment of the present disclosure;

[0018] FIG. 2C is a schematic diagram of TA measurement time according to an embodiment of the present disclosure;

[0019] FIG. 2D is an interaction schematic diagram of a TA measurement method according to an embodiment of the present disclosure;

[0020] FIG. 2E is an interaction schematic diagram of a TA measurement method according to an embodiment of the present disclosure;

[0021] FIG. 3A is a flow schematic diagram of a TA measurement method according to an embodiment of the present disclosure;

[0022] FIG. 3B is a flow schematic diagram of a TA measurement method according to an embodiment of the present disclosure;

[0023] FIG. 4A is a flow schematic diagram of a TA measurement method according to an embodiment of the present disclosure;

[0024] FIG. 4B is a flow schematic diagram of a TA measurement method according to an embodiment of the present disclosure;

[0025] FIG. 5 is a flow schematic diagram of a TA measurement method according to an embodiment of the present disclosure;

[0026] FIG. 6 is a flow schematic diagram of a TA measurement method according to an embodiment of the present disclosure;

[0027] FIG. 7A is a structural schematic diagram of a TA measurement device according to an embodiment of the present disclosure;

[0028] FIG. 7B is a structural schematic diagram of a TA measurement device according to an embodiment of the present disclosure;

[0029] FIG. 8A is a structural schematic diagram of a communication device according to an embodiment of the present disclosure;

[0030] FIG. 8B is a structural schematic diagram of a chip according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0031] The present disclosure provides a TA measurement method and device, and a storage medium.

[0032] According to a first aspect of the embodiments of the present disclosure, a TA measurement method is provided, the method is executed by a terminal, and the method comprises: determining whether to perform TA measurement based on a configuration of a network device.

[0033] In the above embodiments, the problem of how to obtain a TA value based on a configuration of a network device is solved. The terminal determines whether to obtain a TA value through the configuration of the network device, ensures the accuracy of performing TA measurement to obtain a TA value, and further ensures the reliability of uplink communication based on the TA value.

[0034] In combination with some embodiments of the first aspect, in some embodiments, the method further comprises:

[0035] receiving a first message sent by the network device, the first message being used to instruct the terminal to perform TA measurement.

[0036] In the above embodiments, the terminal determines whether to perform TA measurement according to the first message in the network device, ensures the accuracy of performing TA measurement to obtain a TA value, and further ensures the reliability of uplink communication based on the TA value.

[0037] In combination with some embodiments of the first aspect, in some embodiments, the first message comprises at least one of the following:

[0038] at least one first cell identifier, the first cell identifier being used to indicate a first cell corresponding to the TA measurement;

[0039] time domain information and / or frequency domain information of a downlink signal of the first cell corresponding to the first cell identifier;

[0040] a downlink transmission time difference between a serving cell and the first cell corresponding to the first cell identifier.

[0041] In the above embodiments, the type of information carried by the first message is expanded, the comprehensiveness of the information carried by the first message is ensured, and the accuracy of determining whether to perform TA measurement based on the first message is ensured.

[0042] In some embodiments of the first aspect, the performing TA measurement comprises:

[0043] performing the TA measurement based on the first message for the first cell, and obtaining a TA value of the first cell.

[0044] In the above embodiments, the terminal can perform TA measurement based on the first cell included in the first message, the accuracy of the measured TA value is ensured, and the reliability of communication based on the TA value is ensured.

[0045] In some embodiments of the first aspect, the at least one first cell identifier is carried in a measurement object configuration of a measurement configuration.

[0046] In the above embodiments, the first cell identifier is carried in the measurement configuration, the first cell can be configured through the measurement configuration, and the accuracy of the configured first cell is ensured.

[0047] In some embodiments of the first aspect, the first message is carried in a measurement configuration; and the performing TA measurement comprises:

[0048] performing TA measurement for a first cell corresponding to the measurement configuration.

[0049] In the above embodiments, TA measurement can be performed after the first cell is determined through the measurement configuration, and the accuracy of performing TA measurement is ensured.

[0050] In some embodiments of the first aspect, the performing TA measurement comprises:

[0051] determining that the first cell meets an entering condition of the measurement event, and performing TA measurement; or

[0052] determining that the first cell meets the measurement event, and performing TA measurement; or

[0053] performing TA measurement for a cell meeting the measurement event; or

[0054] performing TA measurement for a cell with the strongest signal among cells meeting the measurement event.

[0055] In the above embodiments, the manner of performing TA measurement is expanded, the comprehensiveness of the manner of performing TA measurement is ensured, and the accuracy of performing TA measurement is ensured.

[0056] In some embodiments combined with the first aspect, in some embodiments, the method further comprises:

[0057] receiving a second message sent by the network device, the second message being used to instruct the terminal to switch to a target cell, and the target cell supporting TA measurement.

[0058] In the above embodiments, the terminal performs TA measurement based on the target cell indicated by the network device, thereby ensuring the accuracy of the TA measurement performed by the terminal.

[0059] In some embodiments combined with the first aspect, in some embodiments, the second message comprises at least one of:

[0060] indication information, the indication information being used to instruct the terminal to perform TA measurement on the target cell;

[0061] downlink transmission time difference information, the downlink transmission time difference information being used to indicate the downlink transmission time difference between the serving cell and the target cell.

[0062] In the above embodiments, the types of information carried by the second message are expanded, thereby ensuring the comprehensiveness of the information carried by the second message, and further ensuring the accuracy of the determination of the terminal based on the second message to perform TA measurement.

[0063] In some embodiments combined with the first aspect, in some embodiments, the method further comprises:

[0064] the first cell performing the TA measurement does not include the target cell, and the TA measurement on the first cell is stopped.

[0065] In the above embodiments, if the first cell performing the TA measurement does not include the target cell, it means that the cell performing the TA measurement does not need to continue the TA measurement at this time, and thus the TA measurement is stopped, thereby saving the resource overhead of the TA measurement.

[0066] In some embodiments combined with the first aspect, in some embodiments, the method further comprises:

[0067] starting a TA calculation timer when starting to perform the TA measurement.

[0068] In the above embodiments, the TA calculation timer is started when the TA measurement is performed, thereby ensuring the accuracy of the started TA calculation timer.

[0069] In some embodiments combined with the first aspect, in some embodiments, the method further comprises:

[0070] during the running of the TA calculation timer, the terminal acquires the TA value of the target cell, and stops the TA calculation timer; or,

[0071] The TA calculation timer expires, and the TA value of the target cell is not obtained, and the TA measurement is stopped.

[0072] In the above embodiment, the manner in which the terminal stops the TA calculation timer or stops the TA measurement is extended, thereby ensuring the reliability of the terminal stopping the TA calculation timer or stopping the TA measurement.

[0073] In combination with some embodiments of the first aspect, in some embodiments, the method further includes:

[0074] During the running of the TA calculation timer, the first cell performing the TA measurement is the target cell, and the TA value of the target cell is obtained before the TA calculation timer expires, and the RACH-less handover is performed based on the TA value; or,

[0075] The first cell performing the TA measurement includes the target cell, and the TA calculation timer expires, and the RACH-based handover is performed; or,

[0076] The first cell performing the TA measurement does not include the target cell, and the RACH-based handover is performed.

[0077] In the above embodiment, according to the type and state of the cell performing the TA calculation, the operation subsequently performed by the terminal is determined, the accuracy of the determined operation is ensured, and the communication reliability is further ensured.

[0078] In combination with some embodiments of the first aspect, in some embodiments, the terminal has started to perform the TA measurement on the first cell, and the TA calculation timer is in a running state, and the method includes:

[0079] The second message sent by the network device is received, the first cell is the target cell for the terminal to perform handover, and the TA value is obtained by performing the TA measurement, and the RACH-less handover is performed based on the TA value; or,

[0080] The second message sent by the network device is received, the first cell is the target cell for the terminal to perform handover, and the TA calculation timer expires, and the RACH-based handover is performed; or,

[0081] The second message sent by the network device is received, the first cell is not the target cell for the terminal to perform handover, and the RACH-based handover is performed.

[0082] In the above embodiment, if the TA calculation timer is in a running state when the message for indicating handover sent by the network device is received, the manner in which the terminal performs the subsequent operation is ensured, and the communication reliability is further ensured.

[0083] In some embodiments of the first aspect, in some embodiments, the determining whether to perform the TA measurement based on the network device comprises:

[0084] determining whether to perform the TA measurement based on the second message.

[0085] In some embodiments of the first aspect, in some embodiments, the determining whether to perform the TA measurement based on the second message comprises:

[0086] the second message instructs to perform the TA measurement on the target cell and start a TA computation timer; or,

[0087] the second message does not instruct to perform the TA measurement on the target cell, and the performing the handover based on RACH.

[0088] In some embodiments of the first aspect, in some embodiments, after the second message instructs to perform the TA measurement on the target cell and start the TA computation timer, the method further comprises:

[0089] the terminal acquires the TA value of the target cell, stops the TA computation timer, and performs the RACH-less handover based on the TA value; or,

[0090] the TA computation timer times out, and the performing the handover based on RACH.

[0091] In the above embodiments, the way of performing the TA measurement based on the second message is expanded, thereby ensuring the accuracy of performing the TA measurement.

[0092] In some embodiments of the first aspect, in some embodiments, the method further comprises:

[0093] the TA computation timer is running, and the sending the uplink data or receiving the downlink data continues the TA measurement on the target cell; or,

[0094] when the uplink synchronization state is out of synchronization, the TA computation timer is not running, and the sending the uplink data or receiving the downlink data triggers the random access.

[0095] In the above embodiments, the accuracy of the terminal performing operations under different conditions is expanded, thereby ensuring the reliability of the terminal communication.

[0096] In some embodiments of the first aspect, in some embodiments, the TA value of the target cell is acquired based on the TA measurement, and the method further comprises:

[0097] starting a TAT (Timing Alignment Timer) corresponding to the target cell when the second message is received; or,

[0098] When the terminal sends uplink data for the first time, the TAT corresponding to the target cell is started.

[0099] In the above embodiment, the manner in which the terminal starts the TAT is extended, thereby ensuring the accuracy of starting the TAT.

[0100] In a second aspect, a TA measurement method is provided. The method is performed by a network device and includes the following steps.

[0101] A first message is sent to a terminal, the first message being used to instruct the terminal to perform a TA measurement.

[0102] In some embodiments of the second aspect, the first message includes at least one of the following:

[0103] At least one first cell identifier, the first cell identifier being used to indicate a first cell corresponding to the TA measurement;

[0104] Time domain information and / or frequency domain information of a downlink signal of the first cell corresponding to the first cell identifier;

[0105] A downlink transmission time difference between a serving cell and the first cell corresponding to the first cell identifier.

[0106] In some embodiments of the second aspect, the first message is used to instruct the terminal to start the TA measurement on the first cell to obtain a TA value of the first cell.

[0107] In some embodiments of the second aspect, the at least one first cell identifier is carried in a measurement object configuration of a measurement configuration.

[0108] In some embodiments of the second aspect, the method further includes the following steps.

[0109] A second message is sent to the terminal, the second message being used to instruct the terminal to switch to a target cell, the target cell supporting the TA measurement.

[0110] In some embodiments of the second aspect, the second message includes at least one of the following:

[0111] Indication information, the indication information being used to instruct the terminal to perform a TA measurement on a target cell;

[0112] Downlink transmission time difference information, the downlink transmission time difference information being used to indicate a downlink transmission time difference between a serving cell and the target cell.

[0113] In a third aspect, the embodiments of the present disclosure provide a TA measurement device, the TA measurement device comprising at least one of a transceiver module and a processing module; and wherein the TA measurement device is configured to perform the method of any of the first aspect.

[0114] In a fourth aspect, the embodiments of the present disclosure provide a TA measurement device, the TA measurement device comprising at least one of a transceiver module and a processing module; and wherein the TA measurement device is configured to perform the method of any of the second aspect.

[0115] In a fifth aspect, the embodiments of the present disclosure provide a terminal, comprising: one or more processors; and wherein the terminal is configured to perform the method of any of the first aspect.

[0116] In a sixth aspect, the embodiments of the present disclosure provide a network device, comprising: one or more processors; and wherein the network device is configured to perform the method of any of the second aspect.

[0117] In a seventh aspect, the embodiments of the present disclosure provide a storage medium, the storage medium storing signaling, when the signaling is run on a communication device, causing the communication device to perform the method of any of the first aspect or the second aspect.

[0118] In an eighth aspect, the embodiments of the present disclosure provide a program product, when the program product is executed on a communication device, causing the communication device to perform the method of any of the first aspect or the second aspect.

[0119] In a ninth aspect, the embodiments of the present disclosure provide a computer program, when the computer program is run on a communication device, causing the communication device to perform the method of any of the first aspect or the second aspect.

[0120] In a tenth aspect, the embodiments of the present disclosure provide a chip or chip system. The chip or chip system comprises a processing circuit configured to perform the method of any of the first aspect or the second aspect.

[0121] It can be understood that the terminal, the storage medium, the program product, the computer program, the chip or the chip system are all used to perform the method proposed by the embodiments of the present disclosure. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects in the corresponding method, which will not be described here.

[0122] The embodiments of the present disclosure propose a TA measurement method, a TA measurement device, and a storage medium. In some embodiments, the terms of the TA measurement method and the measurement method, the TA processing method can be replaced with each other, the terms of the TA measurement device and the measurement device, the TA processing device can be replaced with each other, and the terms of the information processing system and the communication system can be replaced with each other.

[0123] The embodiments of the present disclosure are not exhaustive, but only illustrate some embodiments, and are not specific limitations on the protection scope of the present disclosure. In the case of no contradiction, each step in an embodiment can be implemented as an independent embodiment, and the steps can be combined arbitrarily, for example, the scheme after removing part of the steps in an embodiment can also be implemented as an independent embodiment, and the order of the steps in an embodiment can be exchanged arbitrarily, in addition, the optional implementation manners in an embodiment can be combined arbitrarily; in addition, the embodiments can be combined arbitrarily, for example, part or all steps of different embodiments can be combined arbitrarily, an embodiment can be combined with optional implementation manners of other embodiments arbitrarily.

[0124] In each embodiment of the present disclosure, the terms and / or descriptions between the embodiments are consistent if there is no special description and logical conflict, and can be referred to each other, and the technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationship.

[0125] The terms used in the embodiments of the present disclosure are only for the purpose of describing the specific embodiments, and not as a limitation on the present disclosure.

[0126] In the embodiments of the present disclosure, unless otherwise specified, the elements expressed in singular form, such as "one", "a", "the", "above", "said", "preceding", "this" and the like, can represent "one and only one", and can also represent "one or more", "at least one" and the like. For example, in the case of using articles such as "a", "an", "the" and the like in English, the noun after the article can be understood as singular expression, and can also be understood as plural expression.

[0127] In the embodiments of the present disclosure, "a plurality of" means two or more.

[0128] In some embodiments, the terms "at least one of", "one or more", "a plurality of", "multiple" and the like can be replaced with each other.

[0129] In some embodiments, "at least one of A, B", "A and / or B", "in one case A, in another case B", "in response to case A, in response to case B", and the like, can include the following technical solutions according to the case: in some embodiments, A (A is executed regardless of B); in some embodiments, B (B is executed regardless of A); in some embodiments, A and B are selectively executed (A and B are selected from A and B); in some embodiments, A and B (A and B are executed). When there are more branches such as A, B, C, and the like, the above is similar.

[0130] In some embodiments, "A or B" and the like can include the following technical solutions according to the case: in some embodiments, A (A is executed regardless of B); in some embodiments, B (B is executed regardless of A); in some embodiments, A and B are selectively executed (A and B are selected from A and B). When there are more branches such as A, B, C, and the like, the above is similar.

[0131] The prefix words "first", "second", and the like in the embodiments of the present disclosure are only used to distinguish different description objects, and do not constitute a limitation on the position, order, priority, quantity, or content of the description objects. The description of the description objects should refer to the description in the context of the claims or embodiments, and should not constitute an additional limitation because of the use of the prefix words. For example, the description object is "field", and the ordinal words before "field" in "first field" and "second field" do not limit the position or order between "fields", and "first" and "second" do not limit whether the "fields" modified thereby are in the same message or not, nor limit the order of "first field" and "second field". For another example, the description object is "level", and the ordinal words before "level" in "first level" and "second level" do not limit the priority between "levels". For another example, the quantity of the description object is not limited by the ordinal words, and can be one or more. For example, "first device", wherein the quantity of "device" can be one or more. In addition, the objects modified by different prefix words can be the same or different, for example, the description object is "device", and "first device" and "second device" can be the same device or different devices, and the types thereof can be the same or different; for another example, the description object is "information", and "first information" and "second information" can be the same information or different information, and the content thereof can be the same or different.

[0132] In some embodiments, "including A", "containing A", "for indicating A", "carrying A", can be interpreted as directly carrying A, or indirectly indicating A.

[0133] In some embodiments, the terms "time / frequency", "time / frequency domain", and the like refer to the time domain and / or the frequency domain.

[0134] In some embodiments, the terms “in response to,” “in response to determining,” “in the event that,” “when,” “if,” “upon,” and the like can be replaced with each other.

[0135] In some embodiments, the terms “greater than,” “greater than or equal to,” “not less than,” “more than,” “more than or equal to,” “not less than,” “higher than,” “higher than or equal to,” “not lower than,” “above,” and the like can be replaced with each other, and the terms “less than,” “less than or equal to,” “not greater than,” “less than,” “less than or equal to,” “not more than,” “lower than,” “lower than or equal to,” “not higher than,” “below,” and the like can be replaced with each other.

[0136] In some embodiments, the apparatuses and devices can be interpreted as physical or virtual, and their names are not limited to the names described in the embodiments, and in some cases can also be understood as “equipment,” “device,” “circuit,” “network element,” “node,” “function,” “unit,” “section,” “system,” “network,” “chip,” “chip system,” “entity,” “subject,” and the like.

[0137] In some embodiments, “network” can be interpreted as an apparatus included in the network, such as an access network device, a core network device, and the like.

[0138] In some embodiments, an “access network device (AN device)” can also be referred to as a “radio access network device (RAN device),” a “base station (BS),” a “radio base station,” a “fixed station,” and in some embodiments can also be understood as a “node,” an “access point,” a “transmission point (TP),” a “reception point (RP),” a “transmission / reception point (TRP),” a “panel,” an “antenna panel,” an “antenna array,” a “cell,” a “macro cell,” a “small cell,” a “femto cell,” a “pico cell,” a “sector,” a “cell group,” a “serving cell,” a “carrier,” a “component carrier,” a “bandwidth part (BWP),” and the like.

[0139] In some embodiments, a "terminal" or "terminal device" can be referred to as a "user equipment," a "user terminal," a "mobile station," a "mobile terminal," a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communication device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handset, a user agent, a mobile client, a client, and / or the like.

[0140] In some embodiments, data, information, and / or the like can be obtained in compliance with laws and regulations of a country in which the data, information, and / or the like is obtained.

[0141] In some embodiments, data, information, and / or the like can be obtained after consent of a user.

[0142] In addition, each element, each row, or each column in a table of embodiments of the present disclosure can be implemented as an independent embodiment, and a combination of any element, any row, or any column can also be implemented as an independent embodiment.

[0143] FIG. 1 is an architecture schematic diagram of a communication system according to embodiments of the present disclosure, as shown in FIG. 1, the method provided by embodiments of the present disclosure can be applied to a communication system 100, which can include a terminal 101 and a network device 102. It should be noted that the communication system 100 can also include other devices, and the present disclosure does not limit the devices included in the communication system 100.

[0144] In some embodiments, the terminal 101 includes at least one of a mobile phone, a wearable device, a terminal, a car with communication function, a smart car, a tablet (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, a wireless terminal device in self-driving, a wireless terminal device in remote medical surgery, a wireless terminal device in smart grid, a wireless terminal device in transportation safety, a wireless terminal device in smart city, a wireless terminal device in smart home, and the like, but is not limited thereto.

[0145] In some embodiments, the network device 102 includes at least one of an access network device and a core network device. The access network device is at least one of, for example, a node or device that accesses a terminal to a wireless network, and can include at least one of an evolved NodeB (eNB) in a 5G communication system, a next generation eNB (ng-eNB), a next generation NodeB (gNB), a node B (NB), a home node B (HNB), a home evolved node B (HeNB), a wireless backhaul device, a radio network controller (RNC), a base station controller (BSC), a base transceiver station (BTS), a base band unit (BBU), a mobile switching center, a base station in a 6G communication system, an Open RAN, a Cloud RAN, a base station in other communication systems, an access node in a Wi-Fi system, and the like, but is not limited thereto.

[0146] In some embodiments, the technical solutions of the present disclosure can be applied to an Open RAN architecture, at which time the interfaces between or within the access network devices involved in the embodiments of the present disclosure can become internal interfaces of the Open RAN, and the processes and information interactions between these internal interfaces can be implemented through software or programs.

[0147] In some embodiments, the access network device can be composed of a central unit (CU) and a distributed unit (DU), where the CU can also be referred to as a control unit. The CU-DU structure can split the protocol layers of the access network device, with some of the protocol layers being controlled by the CU and the rest or all of the protocol layers being distributed in the DUs, which are controlled by the CU. However, the present disclosure is not limited thereto.

[0148] In some embodiments, the core network device can be one device including one or more network elements, or a plurality of devices or device groups including all or part of the one or more network elements. The network element can be virtual or physical. The core network includes at least one of an evolved packet core (EPC), a 5G core network (5GCN), and a next generation core (NGC).

[0149] It can be understood that the communication system described in the embodiments of the present disclosure is for more clearly illustrating the technical solutions of the embodiments of the present disclosure, and does not constitute a limitation on the technical solutions proposed in the embodiments of the present disclosure. Those skilled in the art can know that the technical solutions proposed in the embodiments of the present disclosure are also applicable to similar technical problems as the system architecture evolves and new business scenarios appear.

[0150] The following embodiments of the present disclosure can be applied to the communication system 100 shown in FIG. 1 or part of the subject, but are not limited thereto. The subjects shown in FIG. 1 are exemplary. The communication system can include all or part of the subjects in FIG. 1, or other subjects other than FIG. 1. The number and form of each subject is arbitrary. Each subject can be physical or virtual. The connection relationship between each subject is exemplary. Each subject can not be connected or can be connected. The connection can be any way, can be direct connection or indirect connection, can be wired connection or wireless connection.

[0151] Embodiments of the present disclosure can be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 5G new radio (NR), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New radio access (NX), Future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (Bl tooth (registered trademark)), Public Land Mobile Network (PLMN) network, Device-to-Device (D2D) system, Machine to Machine (M2M) system, Internet of Things (IoT) system, Vehicle-to-Everything (V2X), system using other TA measurement methods, next-generation system extended based thereon, and the like. In addition, a plurality of systems can be combined (for example, combination of LTE or LTE-A and 5G, and the like).

[0152] FIG. 2A is an interaction diagram of a TA measurement method according to an embodiment of the present disclosure. As shown in FIG. 2A, the present embodiment relates to a TA measurement method, and the method includes:

[0153] In step S2101, the network device sends a first message to the terminal.

[0154] In some embodiments, the first message is used to instruct the terminal to perform the TA measurement. Alternatively, it can also be understood that the first message is used for the terminal to obtain the TA value. Optionally, the TA measurement can also be understood as a TA calculation based on the terminal measurement, which is not limited in the embodiments of the present disclosure.

[0155] Optionally, the TA measurement can also be understood as a TA measurement based on the terminal, which is not limited in the embodiments of the present disclosure.

[0156] In some embodiments, the first message can also be understood as a configuration message, or other messages, which are not limited in the embodiments of the present disclosure.

[0157] In some embodiments, the first message includes at least one of the following:

[0158] (1) At least one first cell identifier.

[0159] In some embodiments, the first cell identifier is used to indicate a first cell corresponding to the TA measurement.

[0160] It should be noted that the first cell in the embodiments of the present disclosure can also be understood as a neighbor cell, or a cell configured for mobility, which is not limited in the embodiments of the present disclosure.

[0161] Optionally, the cell configured for mobility can be referred to as any one or more of a candidate cell, a target cell, or a cell to be accessed, which is not limited in the embodiments of the present disclosure.

[0162] In some embodiments, the first cell identifier can also be understood as a cell identifier of the cell performing the TA measurement, which is not limited in the embodiments of the present disclosure.

[0163] (2) Time domain information and / or frequency domain information of a downlink signal of the first cell corresponding to the first cell identifier.

[0164] In the embodiments of the present disclosure, the time domain information and / or frequency domain information is used to indicate a resource position of the first cell transmitting the downlink signal.

[0165] In some embodiments, the time domain information and / or frequency domain information of the downlink signal can also be understood as time domain information and / or frequency domain information of the downlink signal of the first cell for the TA measurement.

[0166] Optionally, the downlink signal is a Synchronization Signal / PBCH Block (SSB) signal, a Channel State Information Reference Signal (CSI-RS) signal, or other signals, which are not limited in the embodiments of the present disclosure.

[0167] (3) the downlink transmission time difference between the serving cell and the first cell corresponding to the first cell identity.

[0168] In some embodiments, the first message includes a measurement configuration, which includes a TA measurement configuration.

[0169] In some embodiments, the network device indicates one or more first cells for which TA measurement is required in the measurement object configuration. The one or more first cells for which TA measurement is required are identified by a neighbor cell list.

[0170] Optionally, the measurement configuration can also include downlink transmission time difference information between the serving cell and the first cell. It should be noted that if the downlink transmission time difference information is not configured, the default downlink transmission time difference information is 0.

[0171] In some embodiments, the network device can also not configure one or more first cells for which TA measurement is required, and the network device can only indicate that TA measurement is performed for the first cell corresponding to the measurement configuration.

[0172] In some embodiments, the reference signal configuration in the measurement object can be used by the terminal to measure the downlink reception timing difference between the serving cell and the neighbor cell.

[0173] In some embodiments, both the serving cell and the first cell can transmit downlink data, and there is a time difference in transmitting downlink data between the serving cell and the first cell.

[0174] It should be noted that if the first message does not include the downlink transmission time difference, it means that the time difference in transmitting downlink signals between the serving cell and the first cell is 0.

[0175] In some embodiments, the TA measurement refers to the TA value of the source cell of the terminal and the downlink reception timing difference between the source cell and the neighbor cell, and the TA value of the target cell is calculated. If the terminal is configured with the downlink transmission time difference between the current serving cell and the neighbor cell, the real "downlink reception timing difference between the source cell and the neighbor cell" is calculated.

[0176] In some embodiments, the terminal obtains the TA value by using the method shown in FIG. 2B. The terminal can calculate and obtain the uplink timing of the terminal in cell 2 according to the downlink reception timing difference between cell 1 and cell 2 and the uplink timing of the terminal in cell 1. The calculation method is shown in FIG. 2B: (TA_Cell_2) / 2=(TA_Cell_1) / 2+Rx_Diff

[0177] TA_Cell_1: TA value of cell 1

[0178] TA_Cell_2: TA value of cell 2

[0179] Rx_Diff: Downlink reception timing difference between cell 1 and cell 2

[0180] In some embodiments, the terminal obtains the TA value by using the method shown in FIG. 2C. The terminal can obtain the uplink timing of the terminal in cell 2 according to the downlink reception timing difference between cell 1 and cell 2, the uplink timing of the terminal in cell 1, and the downlink transmission time difference between cell 1 and cell 2. The calculation method is shown in FIG. 2C: (TA_Cell_2) / 2 = (TA_Cell_1) / 2 + Rx_Diff - Tx_Diff

[0181] TA_Cell_1: TA value of cell 1

[0182] TA_Cell_2: TA value of cell 2

[0183] Rx_Diff: Downlink reception timing difference between cell 1 and cell 2

[0184] Tx_Diff: Downlink transmission time difference between cell 1 and cell 2

[0185] In step S2102, the terminal receives the first message sent by the network device.

[0186] In the embodiments of the present disclosure, after receiving the first message sent by the first network device, the terminal can determine the configuration and / or time difference information of the corresponding first cell according to the first message.

[0187] In step S2103, the terminal performs TA measurement on the first cell based on the first message, and obtains the TA value of the first cell.

[0188] In some embodiments, after receiving the first message sent by the network device, the terminal can start to perform TA measurement and obtain the TA value of the first cell.

[0189] For example, the terminal performs TA measurement on at least one first cell indicated by the first cell identifier based on the time domain information and / or the frequency domain information and / or the downlink transmission time difference.

[0190] In some embodiments, the first message is carried in the measurement configuration. In some embodiments, the at least one first cell identifier in the first message is carried in the measurement object configuration of the measurement configuration. Alternatively, it can also be understood that the at least one first cell identifier in the first message is carried in the reporting configuration.

[0191] In the embodiments of the present disclosure, the first message is carried in the measurement configuration, and the terminal can perform TA measurement on the first cells corresponding to the at least one first cell identifier indicated in the first message. It should be noted that the above embodiments are described by taking the TA measurement on the first cells corresponding to the at least one first cell identifier indicated in the first message as an example. In another embodiment, the terminal can perform TA measurement on at least one neighbor cell of the measurement configuration.

[0192] It should be noted that if the first message is carried in the measurement configuration, the terminal can determine whether to perform TA measurement according to the measurement event included in the measurement configuration. The following describes different cases.

[0193] In some embodiments, the terminal determines that the first cell satisfies the entering condition of the measurement event, and performs the TA measurement. In the embodiments of the present disclosure, if the terminal determines that any of the first cells satisfies the entering condition of the measurement event, the terminal performs the TA measurement. Alternatively, the terminal performs the TA measurement on the first cell satisfying the entering condition of the measurement event.

[0194] In some embodiments, the terminal determines that the first cell satisfies the measurement event, and performs the TA measurement. Alternatively, the first cell satisfying the measurement event can also be understood as triggering the measurement reporting. Alternatively, the determination of the terminal that the first cell satisfies the measurement event can be understood as that the first cell satisfies the entering condition of the measurement event within a certain time length.

[0195] In some embodiments, the terminal performs the TA measurement on the cell satisfying the measurement event. Alternatively, the terminal performs the TA measurement on the cell satisfying the measurement event among the cells indicated by the at least one first cell identifier in the measurement configuration. Alternatively, the cell satisfying the measurement event refers to the cell included in the triggering cell list. In the embodiments of the present disclosure, the terminal determines the cell satisfying the measurement event, and performs the TA measurement on the determined cell.

[0196] In some embodiments, the terminal performs the TA measurement on the cell with the strongest signal among the cells satisfying the measurement event. Alternatively, the terminal can perform the TA measurement on the cell with the strongest signal among the cells satisfying the measurement event.

[0197] In step S2104, the terminal starts the TA measurement, and starts a TA calculation timer.

[0198] In some embodiments, the terminal starts the TA measurement, and also starts the corresponding TA calculation timer. Alternatively, the TA calculation timer is used to indicate the duration of the TA measurement performed by the terminal. Alternatively, the TA calculation timer can also be understood as being used to indicate the maximum duration of the TA measurement supported by the terminal.

[0199] In some embodiments, the duration of the TA calculation timer is configured by the network device, or agreed by the communication protocol, or set in other manners, which are not limited in the embodiments of the present disclosure.

[0200] In some embodiments, the terminal maintains one TA calculation timer for each first cell. Optionally, if the terminal starts the TA measurement for one first cell, the terminal starts the TA calculation timer corresponding to the first cell.

[0201] In some embodiments, the terminal maintains one TA calculation timer for each first cell set (or first cell group). Optionally, if the terminal starts the TA measurement for one first cell set (or first cell group), the terminal starts the TA calculation timer corresponding to the first cell set (or first cell group).

[0202] It should be noted that in the embodiments of the present disclosure, after the terminal starts the TA calculation timer, the terminal determines the operation to be performed based on the state of the TA calculation timer.

[0203] For example, the state of the TA calculation timer includes, but is not limited to, any one or more of "running", "not in running", "timeout" and "stopped", which are not limited in the embodiments of the present disclosure.

[0204] In some embodiments, during the running of the TA calculation timer, the terminal obtains the TA value of the cell, and stops the TA calculation timer. In the embodiments of the present disclosure, if the terminal obtains the TA value of the cell, it means that the TA calculation is no longer needed, and therefore the TA calculation timer is stopped.

[0205] In some embodiments, the TA calculation timer times out, and the TA value of the cell is not obtained, and the TA measurement is stopped. Optionally, the terminal can notify the network device that the terminal cannot obtain the TA value of the cell through the TA measurement. Optionally, the terminal can indicate the identity of the cell or the corresponding measurement configuration identity to indicate that the corresponding cell cannot obtain the TA value.

[0206] In some embodiments, it should be noted that if the terminal obtains the TA value through the TA measurement in the embodiments of the present disclosure, the terminal can start the TAT to determine the valid duration of the TA value obtained through the TA calculation.

[0207] In some embodiments, during the running of the TA calculation timer, the terminal obtains the TA value of the cell, stops the TA calculation timer, and starts the TAT. In some embodiments, if the TAT times out, the terminal can also re-perform the TA measurement on the cell whose TAT times out.

[0208] In some embodiments, the TA calculation timer is running, the uplink data is sent or the downlink data is received, and the TA measurement on the target cell is continued.

[0209] In some embodiments, the uplink synchronization state is out-of-sync, the TA calculation timer is not running, and the uplink data is sent or the downlink data is received, triggering random access. In the embodiments of the present disclosure, since the uplink state of the terminal and the network device is out-of-sync, and the terminal needs to send uplink data or receive downlink data, the terminal needs to trigger random access in order to enter the uplink synchronization state through random access.

[0210] It should be noted that when the TAT of the first cell expires, the terminal can indicate the network device that the TAT of the first cell expires. Alternatively, the terminal can also restart the TA measurement based on the configuration of the network device.

[0211] In step S2105, the network device sends a second message to the terminal.

[0212] In some embodiments, the second message is used to instruct the terminal to switch to the target cell, and the target cell supports TA measurement. Optionally, the second message further includes the identity of the target cell, so that the terminal switches to the target cell based on the identity of the target cell included in the second message. Optionally, the target cell is the cell to which the terminal needs to switch.

[0213] In some embodiments, the second message includes at least one of the following:

[0214] (1) indication information, the indication information being used to instruct the terminal to perform TA measurement on the target cell.

[0215] (2) downlink transmission time difference information, the downlink transmission time difference information being used to indicate the downlink transmission time difference between the serving cell and the target cell.

[0216] In step S2106, the terminal determines the operation based on the second message.

[0217] In some embodiments, the first cell on which the TA measurement is performed does not include the target cell, and the TA measurement on the first cell is stopped. In the embodiments of the present disclosure, if the first cell on which the TA measurement is performed does not include the target cell, it means that the terminal will not communicate with the first cell and does not need to obtain the TA value of the first cell, and therefore the TA measurement on the first cell is stopped.

[0218] In some embodiments, the TA calculation timer is running, the second message is received, the first cell on which the TA measurement is performed is the target cell, the TA value of the target cell is obtained before the TA calculation timer expires, and the RACH-less switching is performed based on the TA value. In the embodiments of the present disclosure, the terminal obtains the TA value of the target cell, and the TA value can be used for RACH-less switching, so the terminal can perform RACH-less switching.

[0219] Optionally, RACH-less refers to reducing mobility interruption time by not performing (or removing) a random access (RACH) procedure during a mobility event (including handover and / or pcell change / addition).

[0220] In some embodiments, if the first cell includes the target cell, and the TA value of the target cell is obtained before the TA calculation timer expires, the terminal can perform PSCell change or addition based on the TA value, and send an RRC reconfiguration complete message to the target cell.

[0221] In some embodiments, the first cell performing the TA measurement includes the target cell, and the TA calculation timer expires, and a RACH-based handover is performed. In the embodiments of the present disclosure, if the TA calculation timer expires, it means that the terminal does not obtain the TA value of the target cell, and the terminal can perform the RACH-based handover.

[0222] In some embodiments, the first cell performing the TA measurement does not include the target cell, and a RACH-based handover is performed. In the embodiments of the present disclosure, since the first cell performing the TA measurement by the terminal does not include the target cell, that is, the terminal cannot obtain the TA value of the target cell, the terminal can perform the RACH handover.

[0223] It should be noted that in the embodiments of the present disclosure, the terminal can also start the TAT of the TA value. In some embodiments, the TAT corresponding to the target cell is started when the second message is received. The TAT corresponding to the target cell is started when the terminal sends the uplink data for the first time.

[0224] In some embodiments, the terminal receives the second message sent by the network device, and when the TA value of the target cell is obtained by the TA measurement, the terminal starts the TAT corresponding to the target cell at the first time. Optionally, the second message can also be used for the PSCell change or addition message, and the embodiments of the present disclosure are not limited thereto.

[0225] Optionally, the first time is when the terminal receives the second message sent by the network device.

[0226] Optionally, when the terminal receives the second message sent by the network device, the MAC (Media Access Control) layer starts the corresponding TAT.

[0227] In some embodiments, the first time is when the terminal sends the uplink transmission for the first time, and the MAC layer starts the corresponding TAT.

[0228] For example, the terminal can send the uplink transmission through SR (Scheduling Resquest) or DG PUSCH (Dynamic Grant-Physical Downlink Shared Channel).

[0229] The TA measurement method related to the embodiments of the present disclosure can include at least one of steps S2101-S2106. For example, at least one of steps S2101-S2106 can be implemented as an independent embodiment, but is not limited thereto.

[0230] In some embodiments, at least one of steps S2101-S2106 is optional, and one or more of the steps can be omitted or replaced in different embodiments.

[0231] In some embodiments, other optional implementations described before or after the description corresponding to FIG. 2A can be referred to.

[0232] It should be noted that the embodiments of the present disclosure are described by taking steps S2101-S2105 as an example. In another embodiment, the execution order of steps S2101-S2105 is not limited, and steps S2101-S2105 can also be executed in other orders.

[0233] It should be noted that the embodiments of the present disclosure are described by taking steps S2105-S2106 as an example. In another embodiment, the network device instructs to perform TA measurement through the second message, which can also form a new embodiment alone. Referring to FIG. 2D, the method includes:

[0234] Step S2401, the network device sends a second message to the terminal.

[0235] In some embodiments, the second message is used to instruct the terminal to switch to a target cell, and the target cell supports TA measurement.

[0236] In some embodiments, the second message includes at least one of the following:

[0237] (1) indication information, the indication information is used to instruct the terminal to perform TA measurement on the target cell.

[0238] (2) downlink transmission time difference information, the downlink transmission time difference information is used to indicate a downlink transmission time difference between the serving cell and the target cell.

[0239] Wherein, the second message is similar to the second message in the above embodiments, which will not be described here.

[0240] Step S2402, the terminal receives the second message sent by the network device.

[0241] In the embodiments of the present disclosure, after receiving the second message, the terminal can determine that it is necessary to perform TA measurement on the target cell.

[0242] In step S2403, the terminal determines whether to perform TA measurement based on the second message.

[0243] In some embodiments, if the second message includes the indication information, the terminal determines that the TA measurement on the target cell is needed.

[0244] In step S2404, the terminal determines to start the TA calculation timer when performing the TA measurement.

[0245] In some embodiments, the second message indicates to perform the TA measurement on the target cell, and the TA calculation timer is started.

[0246] In step S2405, the terminal determines the operation based on the second message.

[0247] In some embodiments, the second message includes the UE based TA information.

[0248] In some embodiments, the second message is a mobility trigger message.

[0249] In some embodiments, the terminal obtains the TA value of the target cell, stops the TA calculation timer, and performs the RACH-less handover based on the TA value. In some embodiments, the RACH-less handover can also be understood as PSCell change or addition, which is not limited in the embodiments of the present disclosure.

[0250] In some embodiments, the TA calculation timer is timed out, and the RACH-based handover is performed. Optionally, the RACH includes at least one of CFRA or CBRA. Optionally, the RACH handover can also be replaced by PSCell change or addition, which is not limited in the embodiments of the present disclosure.

[0251] In some embodiments, the TA calculation timer is running, the uplink data is sent or the downlink data is received, and the TA measurement on the target cell is continued. In the embodiments of the present disclosure, if the terminal needs to send uplink data or receive downlink data when performing the TA measurement, the terminal needs to continue to perform the TA measurement on the target cell.

[0252] Optionally, when the terminal measures the TA value of the target cell, the terminal accesses the target cell through the RACH-less mobility.

[0253] It should be noted that in the embodiments of the present disclosure, the terminal measures the TA value of the target cell, and the PSCell change or addition can also be performed.

[0254] It should be noted that, for the terminal, if the uplink is not synchronized, when the TA calculation timer is not running and the downlink or uplink data arrives, the terminal initiates random access. Or, if the uplink is not synchronized but the downlink or uplink data arrives, if the TA calculation timer is running, the terminal does not initiate random access.

[0255] The TA calculation timer is a TA calculation timer corresponding to a cell that the terminal needs to access.

[0256] In some embodiments, when the uplink synchronization state is not synchronized, the TA calculation timer is not running, and the uplink data is sent or the downlink data is received, the random access is triggered.

[0257] It should be noted that the terminal starts the TAT corresponding to the target cell when receiving the second message. In some embodiments, the terminal starts the TAT corresponding to the target cell when sending the uplink data for the first time. Alternatively, the terminal can send the uplink transmission through SR or DG PUSCH.

[0258] It should be noted that the above embodiments are described by taking the terminal starting the TA calculation timer as an example.

[0259] In some embodiments, the second message does not indicate performing TA measurement on the target cell, and performs RACH-based switching. Alternatively, the second message does not indicate performing TA measurement on the target cell, does not perform TA measurement on the target cell, and performs RACH-based switching.

[0260] Alternatively, the RACH includes at least one of CFRA or CBRA.

[0261] Alternatively, the RACH switching can also be replaced by PSCell change or addition, and the embodiments of the present disclosure are not limited thereto.

[0262] It should be noted that, if the terminal has obtained a valid TA value of the target cell through TA measurement when the UE receives the switching command, the terminal performs RACH-less switching based on the TA value. Or, the terminal performs PSCell change or addition based on the TA value.

[0263] The TA measurement method related to the embodiments of the present disclosure can include at least one of steps S2401-S2405. For example, at least one of steps S2401-S2405 can be implemented as an independent embodiment, but is not limited thereto.

[0264] In some embodiments, at least one of steps S2401-S2405 is optional, and one or more of these steps can be omitted or replaced in different embodiments.

[0265] In some embodiments, other optional implementations described before or after the corresponding description of FIG. 2D can be referred to.

[0266] It should be noted that the present embodiment is described by taking steps S2401-S2405 as an example. In another embodiment, the execution order of steps S2401-S2405 is not limited, and steps S2401-S2405 can also be executed in other orders.

[0267] It should be noted that the terminal maintaining the TA calculation timer is described by taking an example. Referring to FIG. 2E, the method includes:

[0268] In step S2501, the terminal starts the TA calculation timer.

[0269] In some embodiments, the terminal step S2501 in the present embodiment is similar to step S2104 in the above-mentioned embodiment, and will not be described here again.

[0270] In some embodiments, when the synchronization state is "out of synchronization" and the TA calculation timer is not running, if downlink or uplink data arrives, the terminal triggers random access.

[0271] In some embodiments, when the synchronization state is "out of synchronization" and the TA calculation timer is running, if downlink or uplink data arrives, the terminal triggers random access.

[0272] In some embodiments, when the synchronization state is "out of synchronization" and the TA calculation timer is not started, if downlink or uplink data arrives, the terminal triggers random access.

[0273] In some embodiments, when the synchronization state is "out of synchronization" and the TA calculation timer is not configured, if downlink or uplink data arrives, the terminal triggers random access.

[0274] In some embodiments, when the synchronization state is "out of synchronization" and the TA calculation timer is running, if downlink or uplink data arrives, the terminal continues to perform TA measurement.

[0275] In step S2502, the network device sends a second message to the terminal.

[0276] In step S2503, the terminal receives the second message sent by the network device.

[0277] In some embodiments, steps S2502-S2503 are similar to steps S2105 and S2106 in the above-mentioned embodiment, and will not be described here again.

[0278] It should be noted that steps S2501 and S2502 and S2503 can be executed in an exchanged order, and the present embodiment is not limited.

[0279] In some embodiments, step S2502 is performed first, and then steps S2503 and S2501 are performed. That is, when the terminal receives the second message sent by the network device, the TA calculation timer is started:

[0280] For example, when the terminal receives the second message sent by the network device, the TA calculation timer is started, including any one or more of the following two cases:

[0281] 1) When the terminal receives the second message sent by the network device, the TA measurement is started, and the TA calculation timer is started.

[0282] 2) The terminal starts the TA measurement, and when the terminal receives the second message sent by the network device, the TA calculation timer is started.

[0283] One possible way is that the TA measurement is started to start the TA measurement of the target cell indicated in the second message. For 1), when the terminal receives the second message sent by the network device, the TA measurement is started, and the TA calculation timer is started. The terminal can start the TA measurement of the target cell based on the configuration information in the second message.

[0284] Another possible way is that the TA measurement is started to start the TA measurement of the first cell by the terminal based on the configuration of the network device, and the first cell can be the target cell and / or other neighboring cells (or candidate cells). For 2), the terminal starts the TA measurement, and when the terminal receives the second message sent by the network device, the TA calculation timer is started. If the first cell is the target cell, the terminal receives the second message sent by the network device, and the TA calculation timer is started. It should be noted that in the embodiments of the present disclosure, if step S2502 and / or S2503 are performed first and step S2501 is performed later, there is a case that the TA calculation timer is started when the terminal receives the second message. Alternatively, the TA calculation timer can also refer to the time for which the terminal starts the access process to support the waiting. The TA calculation timer can also be referred to as an access waiting timer.

[0285] Step S2504, if the TA is obtained, the terminal performs RACH-less mobility.

[0286] In some embodiments, if the TA is obtained, the terminal stops the TA calculation timer.

[0287] In some embodiments, if the TA is obtained before the TA calculation timer expires, the terminal performs RACH-less mobility.

[0288] In some embodiments, if the TA calculation timer expires, the terminal performs RACH-based mobility.

[0289] In some embodiments, the terminal performs RACH-based mobility if the TA calculation timer expires and no TA is obtained.

[0290] In some embodiments, the TA measurement method according to the embodiments of the present disclosure can include at least one of steps S2501-S2504. For example, at least one of steps S2501-S2504 can be implemented as an independent embodiment, but is not limited thereto.

[0291] In some embodiments, at least one of steps S2501-S2504 is optional, and one or more of the steps can be omitted or replaced in different embodiments.

[0292] For example, steps S2502 and S2503 are optional. The terminal performs steps S2501 and S2504. That is, when the terminal starts the TA calculation timer, if the TA is obtained, the terminal performs RACH-less mobility.

[0293] For example, the starting of the TA calculation timer includes any one or more of the following two cases:

[0294] 1) When the terminal meets the execution condition of mobility, start the TA measurement, and start the TA calculation timer.

[0295] 2) The terminal starts the TA measurement, and when the terminal meets the execution condition of mobility, starts the TA calculation timer.

[0296] One possible way is that the starting of the TA measurement is to start the TA measurement of the target cell corresponding to the mobility that meets the execution condition. When the terminal meets the execution condition of mobility, the terminal performs the TA measurement of the cell that meets the execution condition of mobility, and starts the TA calculation timer.

[0297] Another possible way is that the starting of the TA measurement is that the terminal starts the TA measurement of the first cell (which can be the target cell and / or other candidate cells) based on the configuration of the network side. For 2), the terminal starts the TA measurement, and when the terminal meets the execution condition of mobility, starts the TA calculation timer. If the first cell is the target cell that meets the mobility condition, when the terminal meets the execution condition of mobility, the TA calculation timer is started.

[0298] It should be noted that in the embodiments of the present disclosure, if the terminal performs steps S2501 and S2504, there is a case when the terminal meets the execution condition of mobility, and starts the TA calculation timer. Alternatively, the TA calculation timer can also refer to the time for which the terminal starts the access process to support the waiting. The TA calculation timer can also be referred to as an access waiting timer.

[0299] In some embodiments, other optional implementations described before or after the corresponding description of FIG. 2E can be referred to.

[0300] It should be noted that the embodiments of the present disclosure are described by taking steps S2501-S2504 as an example. In another embodiment, the execution order of steps S2501-S2504 is not limited, and steps S2501-S2504 can also be executed in other orders.

[0301] In some embodiments, the names of information and the like are not limited to the names described in the embodiments, and the terms of "information", "message", "signal", "signaling", "report", "configuration", "indication", "instruction", "command", "channel", "parameter", "domain", "field", "symbol", "symbol", "codebook", "codeword", "code point", "bit", "data", "program", "chip", and the like can be replaced with each other.

[0302] In some embodiments, the terms of "uplink", "uplink", "physical uplink", and the like can be replaced with each other, the terms of "downlink", "downlink", "physical downlink", and the like can be replaced with each other, and the terms of "side", "sidelink", "sidelink communication", "sidelink communication", "direct connection", "direct connection link", "direct connection", "direct connection link communication", and the like can be replaced with each other.

[0303] In some embodiments, "acquire", "obtain", "get", "receive", "transmit", "bidirectional transmission", "send and / or receive" can be replaced with each other, which can be interpreted as receiving from other subjects, obtaining from protocols, obtaining from higher layers, processing to obtain, and various meanings such as autonomous implementation.

[0304] In some embodiments, the terms of "send", "transmit", "report", "issue", "transmit", "bidirectional transmission", "send and / or receive", and the like can be replaced with each other.

[0305] In some embodiments, the terms "moment", "time point", "time", "time position" and the like can be replaced with each other, and the terms "duration", "time period", "time window", "window", "time" and the like can be replaced with each other.

[0306] In some embodiments, the terms "certain", "preseted", "preset", "set", "indicated", "certain", "arbitrary", "first" and the like can be replaced with each other, and "certain A", "preset A", "preset A", "set A", "indicated A", "certain A", "arbitrary A", "first A" can be interpreted as A specified in advance in a protocol or the like, A obtained by setting, configuration, or indication, or A as certain A, certain A, arbitrary A, or first A, but not limited thereto.

[0307] FIG. 3A is a flow diagram of a TA measurement method according to an embodiment of the present disclosure, applied to a terminal. As shown in FIG. 3A, the present disclosure relates to a TA measurement method, and the method comprises:

[0308] In step S3101, the terminal receives a first message sent by the network device.

[0309] The optional implementation of step S3101 can refer to the optional implementation of step S2102 in FIG. 2A and other associated parts in the embodiments involved in FIG. 2A, which will not be repeated here.

[0310] In step S3102, the terminal starts TA measurement for the first cell based on the first message, and obtains the TA value of the first cell.

[0311] The optional implementation of step S3102 can refer to the optional implementation of step S2103 in FIG. 2A and other associated parts in the embodiments involved in FIG. 2A, which will not be repeated here.

[0312] In step S3103, the terminal starts to execute TA measurement, and starts a TA calculation timer.

[0313] The optional implementation of step S3103 can refer to the optional implementation of step S2104 in FIG. 2A and other associated parts in the embodiments involved in FIG. 2A, which will not be repeated here.

[0314] In step S3104, the terminal determines the operation to be performed based on the second message.

[0315] The optional implementation of step S3104 can refer to the optional implementation of step S2106 in FIG. 2A and other associated parts in the embodiments involved in FIG. 2A, which will not be repeated here.

[0316] The TA measurement method related to the embodiments of the present disclosure can include at least one of steps S3101-S3103. For example, step S3101 can be implemented as an independent embodiment, step S3102 can be implemented as an independent embodiment, step S3103 can be implemented as an independent embodiment, and step S3104 can be implemented as an independent embodiment.

[0317] It should be noted that the embodiments of the present disclosure are described by taking steps S3101-S3104 as an example. In another embodiment, the execution order of steps S3101-S3104 is not limited, and steps S3101-S3104 can also be executed in other orders.

[0318] FIG. 3B is a flow diagram of a TA measurement method according to an embodiment of the present disclosure, applied to ground equipment. As shown in FIG. 3B, the present disclosure relates to a TA measurement method, and the method includes:

[0319] In step S3201, the terminal determines whether to perform TA measurement based on the configuration of the network device.

[0320] The optional implementation of step S3201 can refer to the optional implementation of steps S2103-S2104 in FIG. 2A and other associated parts in the embodiments related to FIG. 2A, which will not be described here.

[0321] FIG. 4A is a flow diagram of a TA measurement method according to an embodiment of the present disclosure, applied to a first network device. As shown in FIG. 4A, the present disclosure relates to a TA measurement method, and the method includes:

[0322] In step S4101, the network device sends a first message to the terminal.

[0323] The optional implementation of step S4101 can refer to step S2101 in FIG. 2A and other associated parts in the embodiments related to FIG. 2A, which will not be described here.

[0324] In step S4102, the network device sends a second message to the terminal.

[0325] The optional implementation of step S4102 can refer to step S2105 in FIG. 2A and other associated parts in the embodiments related to FIG. 2A, which will not be described here.

[0326] The TA measurement method related to the embodiments of the present disclosure can include at least one of steps S4101-S4102. For example, step S4101 can be implemented as an independent embodiment, and step S4102 can be implemented as an independent embodiment.

[0327] It should be noted that the embodiments of the present disclosure are described taking steps S4101-S4102 as an example. In another embodiment, the execution order of steps S4101-S4102 is not limited, and steps S4101-S4102 can also be executed in other orders.

[0328] FIG. 4B is a flowchart of a TA measurement method according to an embodiment of the present disclosure, which is applied to a first network device. As shown in FIG. 4B, the embodiments of the present disclosure relate to a TA measurement method, and the method comprises the following steps:

[0329] In step S4201, the network device sends a first message to the terminal.

[0330] The optional implementation of step S4201 can be referred to step S2101 of FIG. 2A and other associated parts of the embodiments related to FIG. 2A, which will not be described here.

[0331] FIG. 5 is a flowchart of a TA measurement method according to an embodiment of the present disclosure. As shown in FIG. 5, the embodiments of the present disclosure relate to a TA measurement method, and the method comprises the following steps:

[0332] In step S5101, the network device sends a first message.

[0333] The optional implementation of step S5101 can be referred to the optional implementation of step S2101 of FIG. 2A and other associated parts of the embodiments related to FIG. 2A, which will not be described here.

[0334] In step S5102, the terminal determines whether to perform TA measurement based on the configuration of the network device.

[0335] The optional implementation of step S5102 can be referred to steps S2103-S2104 of FIG. 2A and other associated parts of the embodiments related to FIG. 2A, which will not be described here.

[0336] In some embodiments, the above method can include the method of the above embodiments of the communication system side, the terminal side, the network device side, and the like, which will not be described here.

[0337] FIG. 6 is a flowchart of a TA measurement method according to an embodiment of the present disclosure. As shown in FIG. 6, the embodiments of the present disclosure relate to a TA measurement method, and the method comprises the following steps:

[0338] In step S6101, the terminal determines to perform “terminal measurement based TA calculation” based on network configuration.

[0339] Optionally, the “terminal measurement based TA calculation” can also be understood as “TA calculation” or “terminal based TA calculation”, which is not limited by the embodiments of the present disclosure.

[0340] In some embodiments, the present disclosure relates to three aspects of processing.

[0341] 1: Based on the network side configuration, the configuration information is used to indicate the UE to perform "terminal measurement based TA calculation"

[0342] A) Receive the network side's pre-configuration information (or called indication information), which can be used to indicate the UE to perform "terminal measurement based TA calculation". The configuration information contains the following information:

[0343] B) The configuration information is contained in the measurement configuration information. When the UE measures the neighbor cell to meet the measurement event corresponding to the measurement configuration, the UE starts "terminal measurement based TA calculation" for the cell that meets the event.

[0344] C) Receive the handover command (or PSCell change or add command) sent by the network side, which carries the indication information indicating that the target cell supports "terminal measurement based TA calculation". When the UE receives the handover command carrying the indication information, the UE starts "terminal measurement based TA calculation".

[0345] 2: Maintain a TA calculation timer for "terminal measurement based TA calculation". Before the timer expires, even if there is uplink data, if the uplink is out of synchronization, the UE does not trigger RACH; When the TA calculation timer expires, if the UE has received the handover command (or PSCell change or add command) sent by the network side, but the UE has not been able to calculate the TA corresponding to the target cell, the UE starts the RACH based handover (or PSCell change or add);

[0346] 3: UE starts the TAT corresponding to the primary cell (or the TAT corresponding to the primary and secondary cells) when receiving the handover command (or PSCell change or add command) sent by the network side or when the UE sends the first uplink transmission.

[0347] In some embodiments:

[0348] 1 (for scheme A and B in invention point 1) Receive the network side's configuration, which is used to indicate the UE to perform "terminal measurement based TA calculation" for a specific cell, wherein the configuration information contains any one or more of the following information:

[0349] 1.1 One or more neighbor cell identities corresponding to the UE performing "terminal measurement based TA calculation".

[0350] 1.2 UE performs time domain and frequency information of downlink signal of one or more neighbor cells corresponding to "terminal measurement based TA calculation".

[0351] 1.2.1 Exemplarily, the downlink signal can be downlink reference signal, e.g. SSB.

[0352] 1.3 Downlink transmission time difference information of serving cell and the neighbor cell in 1.1 (if not configured, default is 0).

[0353] Adopt "terminal measurement based TA calculation" procedure (i.e. terminal calculates "target cell TA value" according to "source cell TA value", and "source cell and neighbor cell downlink reception timing offset". If UE is configured with downlink transmission time difference of current serving cell and neighbor cell. Downlink transmission time difference needs to be considered when calculating real "source cell and neighbor cell downlink reception timing offset".

[0354] 2 (for solution A in invention point 1) When UE receives the configuration information in 1 sent by network side, UE starts "terminal measurement based TA calculation" based on the configuration in 1.2 and 1.3 for one or more neighbor cell identification indicated in 1.1.

[0355] 3 (for solution B in invention point 1) Based on the configuration information in 1.1, UE can be sent through measurement configuration, then

[0356] 3.1 UE can indicate in measurement object configuration (or reporting configuration) that it needs to perform "terminal measurement based TA calculation" for one or more neighbor cells (e.g. can be represented by neighbor cell list).

[0357] 3.1.1 Optionally, it can contain downlink transmission time difference information of serving cell and the neighbor cell (if not configured, default is 0)

[0358] 3.2 Network side can also not configure one or more neighbor cells that need to perform "terminal measurement based TA calculation", network side can only indicate that "terminal measurement based TA calculation" is started for the neighbor cell corresponding to the measurement configuration.

[0359] 3.3 Reference signal configuration in measurement object can be used for UE to measure downlink reception timing offset of serving cell and neighbor cell.

[0360] 4 (for solution B in invention point 1) Based on 3, UE can report measurement associated with event triggered measurement in the measurement object configuration (or the reporting configuration contains measurement event configuration), then any one or more of the following situations:

[0361] 4.1 When UE measures any of the neighbor cells in 3.1 meets the entering condition of the measurement event, UE performs "terminal measurement based TA calculation".

[0362] 4.2 When UE measures any of the neighbor cells in 3.1 meets the entering condition of the measurement event (or called triggers the corresponding measurement reporting), UE performs "terminal measurement based TA calculation" (i.e. all the neighbor cells in TTT meet the entering condition of the measurement event).

[0363] 4.3 For the measurement configuration associated with the measurement identity, UE performs "terminal measurement based TA calculation" for the cell that meets the measurement event (i.e. the cell in the triggered cell list).

[0364] 4.4 For the measurement configuration associated with the measurement identity, UE performs "terminal measurement based TA calculation" for the cell that has the strongest signal (RSRP or RSRQ or SINR) among the cells that meet the measurement event (i.e. the cell in the triggered cell list).

[0365] 5 (for solution C in invention point 1) UE receives the handover command (or PSCell change or addition message) sent by the network (e.g. can be sent by RRC reconfiguration message), which can contain any one or more of the following information:

[0366] 5.1 Indicating information, indicating that UE can perform "terminal measurement based TA calculation" for the target cell (handover target cell or target PSCell).

[0367] 5.2 Can contain the downlink transmission time difference information between the serving cell and the target cell (handover target cell or target PSCell) (if not configured, default to 0).

[0368] 6 (corresponding to invention point 2) When UE starts "terminal measurement based TA calculation" for a neighbor cell, it starts the corresponding TA calculation timer.

[0369] 6.1 Exemplarily, the duration of the TA calculation timer is configured by the network, which can be contained in the configuration information in 1-5 or is the protocol default value.

[0370] 6.2 Exemplarily, UE can maintain one TA calculation timer for each neighbor cell.

[0371] 6.3 Exemplarily, for 5, the handover command indicates to perform "terminal measurement based TA calculation", UE maintains one TA calculation timer for the target cell.

[0372] 7 (corresponding to the invention point 2), based on 1-5, if UE starts the "terminal measurement based TA calculation" for the neighbor cell (or target cell) based on the network side configuration, and the corresponding TA calculation timer is running, then there are any one or more of the following:

[0373] 7.1 if UE calculates the TA value for the neighbor cell (or target cell), UE stops the corresponding TA calculation timer, and starts the corresponding TAT.

[0374] 7.2 if the TA calculation timer expires, and UE is not able to calculate the TA value for the neighbor cell (or target cell), UE stops the corresponding "terminal measurement based TA calculation".

[0375] 7.2.1 optionally, UE can inform the network side that UE is not able to obtain the TA value for the neighbor cell through "terminal measurement based TA calculation", and can indicate the identity of the neighbor cell or the corresponding measurement configuration identity.

[0376] It should be noted that when the TAT of the neighbor cell expires, UE can tell the network, or can restart the "terminal measurement based TA calculation" based on the network side configuration.

[0377] 8 (corresponding to the invention point 2), based on 1-5, if the "terminal measurement based TA calculation" for the neighbor cell (or target cell) is started, and the corresponding TA calculation timer is running, if UE receives the handover command (or PSCell change or addition message) sent by the serving cell, then there are any one or more of the following:

[0378] 8.1 if the neighbor cell is the target cell, and the TA value of the target cell is obtained before the TA calculation timer expires, then UE can perform RACH-less handover (or PSCell change or addition) based on the TA value, and send the RRC reconfiguration complete message to the target cell.

[0379] 8.1.1 exemplary, for UE, if uplink is not synchronized, when the TA calculation timer is not running and downlink or uplink data arrives, UE initiates random access (or in other words, if uplink is not synchronized but downlink or uplink data arrives, if the TA calculation timer is running, UE does not initiate random access).

[0380] wherein the TA calculation timer is the TA calculation timer corresponding to the cell that UE needs to access.

[0381] 8.2 if the neighbor cell is the target cell, and the TA calculation timer expires, UE performs RACH-based handover (or PSCell change or addition) (the RACH can be CFRA or CBRA, based on the network side configuration).

[0382] 8.3 If the neighbor cell is not the target cell, stop the "terminal measurement based TA calculation" for the corresponding neighbor cell, then the UE performs RACH based handover (or PSCell change or addition) (the RACH can be CFRA or CBRA, depending on the network side configuration).

[0383] Note that if the UE has already obtained the valid TA value for the target cell by "terminal measurement based TA calculation" when the UE receives the handover command, the UE performs RACH-less handover (or PSCell change or addition) based on the TA value.

[0384] 9 (corresponding to C in invention point 1 and invention point 2), the UE receives the handover command (or PSCell change or addition message) sent by the network side, and confirms whether to perform "terminal measurement based TA calculation" for the target cell based on the indication information therein.

[0385] 9.1 If the indication information indicates to perform "terminal measurement based TA calculation" for the target cell, start the TA calculation timer (for C in invention point 1, there is only one TA calculation timer), then:

[0386] 9.2 If the UE obtains the TA value of the target cell, stop the TA calculation timer, and perform RACH-less handover (or PSCell change or addition) based on the TA value.

[0387] 9.3 If the TA calculation timer times out, perform RACH based handover (or PSCell change or addition) (the RACH can be CFRA or CBRA, depending on the network side configuration).

[0388] 9.4 If the TA calculation timer is running, but uplink or downlink data arrives, the UE continues to perform "terminal measurement based TA calculation" for the target cell.

[0389] 9.5 When the uplink synchronization state is out of synchronization, if the TA calculation timer is not running, and uplink or downlink data arrives, the UE triggers random access.

[0390] 9.6 If the indication information does not indicate to perform "terminal measurement based TA calculation" for the target cell, perform RACH based handover (or PSCell change or addition) (the RACH can be CFRA or CBRA, depending on the network side configuration).

[0391] 10 (corresponding to inventive point 3), the UE receives the handover command (or PSCell change or addition message) sent by the network side, and when the TA value of the target cell is obtained through "terminal measurement based TA calculation", the UE starts the TAT corresponding to the target cell (the target cell also performs TA maintenance for the UE based on this).

[0392] 10.1 When the UE receives the handover command (or PSCell change or addition command) sent by the network side, the UE starts the corresponding TAT.

[0393] 10.1.1 The RRC can instruct the MAC layer that when the UE receives the handover command (or PSCell change or addition command) sent by the network side, the MAC layer starts the corresponding TAT.

[0394] 10.2 When the UE sends the first uplink transmission, the MAC layer starts the corresponding TAT.

[0395] 10.2.1 Exemplarily, the UE can send uplink transmission through SR or DG PUSCH.

[0396] In the embodiments of the present disclosure, part or all of the steps, and optional implementation manners thereof, can be combined with part or all of the steps in other embodiments, or can be combined with optional implementation manners of other embodiments.

[0397] The embodiments of the present disclosure also propose a device for implementing any of the above methods, for example, a device including units or modules for implementing each step performed by the terminal in any of the above methods. For another example, another device is also proposed, including units or modules for implementing each step performed by the network equipment (such as access network equipment, core network function node, core network equipment, etc.) in any of the above methods.

[0398] It should be understood that the division of each unit or module in the above apparatus is only a logical function division, and all or part of them can be integrated into a physical entity or physically separated in actual implementation. In addition, the units or modules in the apparatus can be implemented in the form of processor calling software: for example, the apparatus includes a processor, the processor is connected with a memory, the memory stores instructions, and the processor calls the instructions stored in the memory to realize any of the above methods or realize the functions of each unit or module of the above apparatus, wherein the processor is a general processor such as a central processing unit (CPU) or a microprocessor, and the memory is a memory in the apparatus or a memory outside the apparatus. Alternatively, the units or modules in the apparatus can be implemented in the form of hardware circuit, and the functions of part or all of the units or modules can be realized by the design of hardware circuit. The above hardware circuit can be understood as one or more processors; for example, in one implementation, the above hardware circuit is an application-specific integrated circuit (ASIC), and the functions of part or all of the units or modules are realized by the design of the logical relationship of elements in the circuit; for another example, in another implementation, the above hardware circuit is a programmable logic device (PLD), and a field programmable gate array (FPGA) is taken as an example, which can include a large number of logic gate circuits, and the connection relationship between the logic gate circuits is configured by a configuration file, so as to realize the functions of part or all of the above units or modules. All units or modules of the above apparatus can be all implemented in the form of processor calling software, or all implemented in the form of hardware circuit, or part implemented in the form of processor calling software and the remaining part implemented in the form of hardware circuit.

[0399] In the embodiments of the present disclosure, the processor is a circuit with signal processing capability. In one implementation, the processor can be a circuit with instruction reading and running capability, such as a central processing unit (CPU), a microprocessor, a graphics processing unit (GPU) (which can be understood as a microprocessor), a digital signal processor (DSP), and the like. In another implementation, the processor can implement certain functions through a logical relationship of hardware circuit, and the logical relationship of the hardware circuit is fixed or reconfigurable. For example, the processor is a hardware circuit implemented by an application-specific integrated circuit (ASIC) or a programmable logic device (PLD), such as an FPGA. In the reconfigurable hardware circuit, the processor loads a configuration document to implement the configuration of the hardware circuit. It can be understood that the processor loads instructions to implement the functions of the above part or all units or modules. In addition, it can also be a hardware circuit designed for artificial intelligence, which can be understood as an ASIC, such as a neural network processing unit (NPU), a tensor processing unit (TPU), a deep learning processing unit (DPU), and the like.

[0400] FIG. 7A is a structural schematic diagram of a TA measurement apparatus according to an embodiment of the present disclosure. As shown in FIG. 7A, the TA measurement apparatus 7100 can include at least one of a transceiver module 7101, a processing module 7102, and the like. In some embodiments, the processing module 7102 is configured to determine whether to perform TA measurement based on the configuration of the network device. Optionally, the transceiver module 7101 is configured to perform at least one of the communication steps, such as receiving and / or transmitting, performed by the terminal in any of the above methods, details of which are not repeated here. Optionally, the processing module is configured to perform at least one of the other steps performed by the terminal in any of the above methods, details of which are not repeated here.

[0401] Optionally, the processing module 7102 is configured to perform at least one of the communication steps, such as processing, performed by the terminal in any of the above methods, details of which are not repeated here.

[0402] FIG. 7B is a structural schematic diagram of the TA measurement apparatus according to the embodiments of the present disclosure. As shown in FIG. 7B, the TA measurement apparatus 7200 can include at least one of a transceiver module 7201, a processing module 7202, and the like. In some embodiments, the transceiver module 7201 is configured to send a first message to a terminal, where the first message is used to instruct the terminal to perform TA measurement. Optionally, the transceiver module 7201 described above is configured to perform at least one of the communication steps such as sending and / or receiving performed by the terminal in any of the above methods, which will not be described here. Optionally, the processing module described above is configured to perform at least one of the other steps performed by the terminal in any of the above methods, which will not be described here.

[0403] Optionally, the processing module 7202 is configured to perform at least one of the communication steps such as processing performed by the terminal in any of the above methods, which will not be described here.

[0404] In some embodiments, the transceiver module can include a sending module and / or a receiving module, which can be separate or integrated together. Optionally, the transceiver module can be mutually replaced with a transceiver.

[0405] In some embodiments, the processing module can be a module or can include multiple sub-modules. Optionally, the multiple sub-modules perform all or part of the steps required to be performed by the processing module. Optionally, the processing module can be mutually replaced with a processor.

[0406] FIG. 8A is a structural schematic diagram of a communication device 8100 according to the embodiments of the present disclosure. The communication device 8100 can be a network device (such as an access network device, a core network device, and the like), a terminal, a chip, a chip system, or a processor supporting the network device to implement any of the above methods, or a chip, a chip system, or a processor supporting the terminal to implement any of the above methods. The communication device 8100 can be used to implement the methods described in the above method embodiments, and specific reference can be made to the descriptions in the above method embodiments.

[0407] As shown in FIG. 8A, the communication device 8100 includes one or more processors 8101. The processor 8101 can be a general-purpose processor or a special-purpose processor, for example, a baseband processor or a central processing unit. The baseband processor can be configured to process communication protocols and communication data, and the central processing unit can be configured to control the TA measurement apparatus (such as a base station, a baseband chip, a terminal, a terminal chip, a DU, or a CU), execute programs, and process data of the programs. The communication device 8100 is configured to execute any of the above methods.

[0408] In some embodiments, the communication device 8100 further includes one or more memories 8102 for storing instructions. Optionally, all or part of the memories 8102 can also be outside the communication device 8100.

[0409] In some embodiments, the communication device 8100 further includes one or more transceivers 8103. When the communication device 8100 includes one or more transceivers 8103, the transceiver 8103 performs at least one of the communication steps (such as steps S2101, S2102, S2103, S2104, but not limited to) in the above-described methods, such as transmitting and / or receiving.

[0410] In some embodiments, the transceiver can include a receiver and / or a transmitter, which can be separate or integrated together. Optionally, the terms transceiver, transceiving unit, transceiver, transceiving circuit, etc. can be replaced with each other, the terms transmitter, transmitting unit, transmitter, transmitting circuit, etc. can be replaced with each other, and the terms receiver, receiving unit, receiver, receiving circuit, etc. can be replaced with each other.

[0411] In some embodiments, the communication device 8100 can include one or more interface circuits 8104. Optionally, the interface circuit 8104 is connected to the memory 8102, and the interface circuit 8104 can be used to receive signals from the memory 8102 or other devices, and can be used to send signals to the memory 8102 or other devices. For example, the interface circuit 8104 can read the instructions stored in the memory 8102 and send the instructions to the processor 8101.

[0412] The communication device 8100 described in the above embodiments can be a network device or a terminal, but the scope of the communication device 8100 described in the present disclosure is not limited thereto, and the structure of the communication device 8100 can not be limited by Figure 8A. The communication device can be a standalone device or can be part of a larger device. For example, the communication device can be: 1) a standalone integrated circuit (IC), or a chip, or a chip system or subsystem; (2) a set of one or more ICs, optionally, the set of ICs can also include storage components for storing data, programs; (3) an ASIC, such as a Modem; (4) a module that can be embedded in other devices; (5) a receiver, a terminal, a smart terminal, a cellular phone, a wireless device, a handset, a mobile unit, a vehicle-mounted device, a network device, a cloud device, an artificial intelligence device, etc.; (6) others, etc.

[0413] Figure 8B is a structural schematic diagram of a chip 8200 according to an embodiment of the present disclosure. For the case where the communication device 8100 is a chip or a chip system, the structural schematic diagram of the chip 8200 shown in Figure 8B can be referred to, but is not limited thereto.

[0414] The chip 8200 comprises one or more processors 8201, and the chip 8200 is configured to execute any of the above methods.

[0415] In some embodiments, the chip 8200 further comprises one or more interface circuits 8202. Optionally, the interface circuit 8202 is connected with the memory 8203, and the interface circuit 8202 can be configured to receive signals from the memory 8203 or other devices, and the interface circuit 8202 can be configured to send signals to the memory 8203 or other devices. For example, the interface circuit 8202 can read instructions stored in the memory 8203 and send the instructions to the processor 8201.

[0416] In some embodiments, the interface circuit 8202 performs at least one of the communication steps such as sending and / or receiving in the above methods, and the processor 8201 performs at least one of the other steps.

[0417] In some embodiments, the terms of interface circuit, interface, transceiver pin, transceiver, etc. can be replaced with each other.

[0418] In some embodiments, the chip 8200 further comprises one or more memories 8203 configured to store instructions. Optionally, all or part of the memory 8203 can be outside the chip 8200.

[0419] The disclosure further proposes a storage medium, and the storage medium stores instructions, and the instructions, when executed on the communication device 8100, cause the communication device 8100 to execute any of the above methods. Optionally, the storage medium is an electronic storage medium. Optionally, the storage medium is a computer readable storage medium, but is not limited to this, and it can also be a storage medium readable by other devices. Optionally, the storage medium can be a non-transitory storage medium, but is not limited to this, and it can also be a transitory storage medium.

[0420] The disclosure further proposes a program product, and the program product, when executed by the communication device 8100, causes the communication device 8100 to execute any of the above methods. Optionally, the program product is a computer program product.

[0421] The disclosure further proposes a computer program, and the computer program, when executed on a computer, causes the computer to execute any of the above methods.

Claims

1. A TA measurement method, characterized by, The method is performed by a terminal, and the method comprises: Determining whether to perform TA measurement based on a configuration of a network device.

2. The method of claim 1, wherein, The method further comprises: Receiving a first message sent by the network device, the first message being used to instruct the terminal to perform TA measurement.

3. The method of claim 2, wherein, The first message comprises at least one of: At least one first cell identifier, the first cell identifier being used to instruct a first cell corresponding to the TA measurement; Time domain information and / or frequency domain information of a downlink signal of the first cell corresponding to the first cell identifier; A downlink transmission time difference between a serving cell and the first cell corresponding to the first cell identifier.

4. The method of claim 3, wherein, The performing of the TA measurement comprises: Performing the TA measurement on the first cell based on the first message to obtain a TA value of the first cell.

5. The method of claim 3, wherein, The at least one first cell identifier is carried in a measurement object configuration of a measurement configuration.

6. The method of claim 3, wherein, The first message is carried in the measurement configuration; and the performing of the TA measurement comprises: Performing the TA measurement on a first cell corresponding to the measurement configuration.

7. The method according to claim 5 or 6, characterized in that, The performing of the TA measurement comprises: Determining that the first cell satisfies an entering condition of the measurement event, and performing the TA measurement; or, Determining that the first cell satisfies the measurement event, and performing the TA measurement; or, Performing the TA measurement on a cell satisfying the measurement event; or, Performing the TA measurement on a cell with the strongest signal among cells satisfying the measurement event.

8. The method according to any one of claims 1 to 7, characterized in that, The method further comprises: Receiving a second message sent by the network device, the second message being used to instruct the terminal to switch to a target cell, and the target cell supporting TA measurement.

9. The method of claim 8, wherein, The second message comprises at least one of: Indication information, the indication information being used to instruct the terminal to perform TA measurement on the target cell; Downlink transmission time difference information, the downlink transmission time difference information being used to instruct a downlink transmission time difference between a serving cell and the target cell.

10. The method according to claim 8 or 9, characterized in that, The method further comprises: Stopping the performing of the TA measurement on the first cell, when the first cell performing the TA measurement does not comprise the target cell.

11. The method according to any one of claims 1 to 10, characterized in that, The method further comprises: Starting a TA calculation timer when the performing of the TA measurement is started.

12. The method of claim 11, wherein, The method further comprises: Stopping the TA calculation timer when the terminal obtains a TA value of a cell during the running of the TA calculation timer; or, Stopping the performing of the TA measurement when the TA calculation timer is timed out and a TA value of a cell is not obtained.

13. The method of claim 11, wherein, The method further comprises: When the first cell performing the TA measurement is the target cell during the running of the TA calculation timer, and the TA value of the target cell is obtained before the TA calculation timer is timed out, performing RACH-less switching based on the TA value; or, When the first cell performing the TA measurement comprises the target cell and the TA calculation timer is timed out, performing RACH-based switching; or, When the first cell performing the TA measurement does not comprise the target cell, performing RACH-based switching.

14. The method of any one of claims 8 to 10, wherein, The determining of whether to perform the TA measurement based on the configuration of the network device comprises: Determining whether to perform the TA measurement based on the second message.

15. The method of claim 14, wherein, The determining of whether to perform the TA measurement based on the second message comprises: The second message indicates to perform TA measurement on the target cell, start a TA calculation timer, and perform the TA measurement; or The second message does not indicate to perform TA measurement on the target cell, and performs RACH-based handover.

16. The method of claim 15, wherein, After the second message indicates to perform TA measurement on the target cell and starts the TA calculation timer, the method further includes: The terminal acquires the TA value of the target cell, stops the TA calculation timer, and performs RACH-less handover based on the TA value; or The TA calculation timer times out, and RACH-based handover is performed.

17. The method of any one of claims 8 to 13, wherein, The method further includes: When the TA calculation timer is running, uplink data is sent or downlink data is received, and TA measurement on the target cell is continued; or When the uplink synchronization state is out of synchronization, the TA calculation timer is not running, and uplink data is sent or downlink data is received, random access is triggered.

18. The method of any one of claims 8 to 17, wherein, The TA value of the target cell is acquired based on the TA measurement, and the method further includes: The TAT corresponding to the target cell is started when the second message is received; or The TAT corresponding to the target cell is started when uplink data is sent for the first time.

19. A TA measurement method, comprising: The method is performed by a network device, and the method includes: Sending a first message to a terminal, the first message being used to instruct the terminal to perform TA measurement.

20. The method of claim 19, wherein, The first message includes at least one of the following: At least one first cell identifier, the first cell identifier being used to indicate a first cell corresponding to the TA measurement; Time domain information and / or frequency domain information of a downlink signal of the first cell corresponding to the first cell identifier; A downlink transmission time difference between a serving cell and the first cell corresponding to the first cell identifier.

21. The method of claim 20, wherein, The first message is used for the terminal to start the TA measurement on the first cell to obtain a TA value of the first cell.

22. The method of claim 20, wherein, The at least one first cell identifier is carried in a measurement object configuration of a measurement configuration.

23. The method of any one of claims 19 to 22, wherein, The method further includes: Sending a second message to the terminal, the second message being used to instruct the terminal to hand over to a target cell, and the target cell supporting TA measurement.

24. The method of claim 23, wherein, The second message includes at least one of the following: Indication information, the indication information being used to instruct the terminal to perform TA measurement on the target cell; Downlink transmission time difference information, the downlink transmission time difference information being used to indicate a downlink transmission time difference between a serving cell and the target cell.

25. A TA measurement system, characterized by, The network device and the terminal are included, wherein The network device is configured to send a first message to the terminal, the first message being used to instruct the terminal to perform TA measurement; The terminal is configured to determine whether to perform TA measurement based on the configuration of the network device.

26. A TA measuring device, characterized by The apparatus includes: A processing module configured to determine whether to perform TA measurement based on the configuration of the network device.

27. A TA measuring device, characterized by The apparatus includes: A transceiver module configured to send a first message to a terminal, the first message being used to instruct the terminal to perform TA measurement.

28. A terminal, characterized by The terminal includes: One or more processors; The processor is configured to perform the TA measurement method in any one of claims 1 to 18.

29. A network device, comprising: The network device includes: One or more processors; The processor is configured to perform the TA measurement method in any one of claims 19 to 24.

30. A storage medium, characterized by The storage medium stores instructions which, when executed on the communication device, cause the communication device to perform the TA measurement method in any one of claims 1 to 24.

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