TA measurement method and device and storage medium

Abstract

The present disclosure relates to a TA measurement method and apparatus, and a storage medium, comprising: a terminal receiving configuration information sent by a network device, the configuration information being used for assisting the terminal in performing TA measurement to obtain TA information, the TA information being used for indicating TA of one or more candidate cells, and the candidate cells being used for condition-based mobility operation of the terminal. The problem that the TA of the candidate cell cannot be determined is solved, the TA of each candidate cell is indicated in the mode that the network equipment configures the TA information of at least one candidate cell for the terminal, it is guaranteed that the terminal can obtain the TA of the candidate cell, the accuracy of the TA obtained by the terminal is guaranteed, and then the reliability of the terminal executing switching based on the TA of the candidate cell is guaranteed.

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, so as 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 the TA value of the conditional mobility process. The terminal obtains the TA value for the conditional mobility process through TA measurement, ensures the accuracy of the obtained TA value, and further ensures the reliability of the 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 an embodiment of the present disclosure, a TA measurement method is provided, the method is executed by a terminal, and the method comprises: performing TA measurement to obtain a TA value, the TA value being used for a conditional mobility process.

[0007] According to a second aspect of an embodiment of the present disclosure, a TA measurement method is provided, the method is executed by a network device, and the method comprises: sending configuration information, the configuration information being used to assist the terminal to perform TA measurement to obtain a TA value, the TA value being used for a conditional mobility process.

[0008] According to a third aspect of an embodiment of the present disclosure, a TA measurement apparatus is provided, comprising: a transceiver module, configured to perform TA measurement to obtain a TA value, the TA value being used for a conditional mobility process.

[0009] According to a fourth aspect of an embodiment of the present disclosure, a TA measurement apparatus is provided, comprising: a transceiver module, configured to send configuration information, the configuration information being used to assist the terminal to perform TA measurement to obtain a TA value, the TA value being used for a conditional mobility process.

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

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

[0012] According to a seventh aspect of the embodiments of the present disclosure, a TA measurement system is provided, comprising: a terminal and a network device, wherein the terminal is configured to implement the TA measurement method in the first aspect, and the network device is configured to implement the TA measurement method in 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 are run on a communication device, causing the communication device to perform the method in any of the first aspect or 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 specifically explain the embodiments of the present disclosure and do not limit 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 diagram of a TA measurement method according to an embodiment of the present disclosure;

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

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

[0019] FIG. 3A is a flow diagram of a TA measurement method according to an embodiment of the present disclosure;

[0020] FIG. 3B is a flow diagram of a TA measurement method according to an embodiment of the present disclosure;

[0021] FIG. 4A is a flow diagram of a TA measurement method according to an embodiment of the present disclosure;

[0022] FIG. 4B is a flow diagram of a TA measurement method according to an embodiment of the present disclosure;

[0023] FIG. 5 is a flow diagram of a TA measurement method according to an embodiment of the present disclosure;

[0024] FIG. 6 is a flow diagram of a TA measurement method according to an embodiment of the present disclosure;

[0025] FIG. 7A is a structural diagram of a TA measurement apparatus according to an embodiment of the present disclosure;

[0026] FIG. 7B is a structural schematic diagram of a TA measurement device according to an embodiment of the present disclosure;

[0027] FIG. 8A is a structural schematic diagram of a communication device according to an embodiment of the present disclosure;

[0028] FIG. 8B is a structural schematic diagram of a chip according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0029] The present disclosure provides a TA measurement method, device and storage medium.

[0030] According to a first aspect of the embodiments of the present disclosure, a TA measurement method is provided, the method is performed by a terminal, and the method comprises: performing TA measurement to obtain a TA value, the TA value being used for a conditional mobility procedure.

[0031] In the above embodiments, the problem of how to obtain the TA value of the conditional mobility procedure is solved. The terminal obtains the TA value of the conditional mobility procedure through TA measurement, which ensures the accuracy of the obtained TA value, and further ensures the reliability of uplink communication based on the TA value.

[0032] In combination with some embodiments of the first aspect, in some embodiments, the TA value is used for the conditional mobility procedure, comprising: the TA value is used for RACH less execution of the conditional mobility procedure.

[0033] In the above embodiments, the obtained TA value is used for RACH less execution of the conditional mobility procedure, which ensures the accuracy of RACH less execution of the conditional mobility procedure, and further ensures the reliability of communication.

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

[0035] receiving configuration information, the configuration information being used to assist the terminal in performing the TA measurement to obtain the TA value.

[0036] In the above embodiments, the configuration information is used to assist the terminal in performing the TA measurement to obtain the TA value, which improves the accuracy of the obtained TA value, and further ensures the reliability of communication based on the TA value.

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

[0038] indication information, the indication information being used to indicate whether the terminal can perform TA measurement;

[0039] Time difference information, the time difference information being used to indicate a time difference of downlink information transmission between each two cells.

[0040] In the above embodiment, the configuration information includes at least one of the indication information or the time difference information, the type of the configuration information is extended, and the comprehensiveness of the configuration information is improved.

[0041] In combination with some embodiments of the first aspect, in some embodiments, the time difference information includes at least one of:

[0042] a time difference of downlink information transmission between the serving cell and each candidate cell in the plurality of candidate cells;

[0043] a time difference of downlink information transmission between the candidate cell configured by the configuration information and other candidate cells;

[0044] a time difference of downlink information transmission between the serving cell and each two cells in the plurality of candidate cells.

[0045] In combination with some embodiments of the first aspect, in some embodiments, the time difference information includes a time difference of downlink information transmission between the serving cell and each candidate cell in the plurality of candidate cells; or a time difference of downlink information transmission between the candidate cell configured by the configuration information and other candidate cells, the configuration information including the time difference information and a candidate cell related identifier corresponding to the time difference information.

[0046] In combination with some embodiments of the first aspect, in some embodiments, the time difference information includes a time difference of downlink information transmission between the serving cell and each two cells in the plurality of candidate cells, and the configuration information includes the time difference information and a candidate cell and / or serving cell identifier corresponding to the time difference information.

[0047] In the above embodiment, the type of the time difference information is extended, the comprehensiveness of the time difference information is ensured, and the accuracy of determining the TA value based on the time difference information is ensured.

[0048] In combination with some embodiments of the first aspect, in some embodiments, the method further includes:

[0049] starting the TA measurement based on the configuration information.

[0050] In combination with some embodiments of the first aspect, in some embodiments, the performing the TA measurement includes:

[0051] receiving a configuration of a conditional procedure based mobility, performing the TA measurement on the candidate cell; or,

[0052] determining that a mobility execution condition corresponding to the candidate cell is met, performing the TA measurement; or,

[0053] a TA of a candidate cell is invalid, starting a TA measurement for the candidate cell; or

[0054] configuration information of a candidate cell is updated, starting a TA measurement for the candidate cell.

[0055] In the above embodiments, different situations of starting a TA measurement are extended, and the accuracy of starting a TA measurement is ensured.

[0056] In combination with some embodiments of the first aspect, in some embodiments, the TA of the candidate cell is invalid, and the TA measurement for the candidate cell is started.

[0057] a TAT (Timing Alignment Timer) of the candidate cell is expired.

[0058] In combination with some embodiments of the first aspect, in some embodiments, the method further comprises:

[0059] deleting a TA value corresponding to the candidate cell, and stopping a TAT corresponding to the TA value.

[0060] In the above embodiments, the accuracy of updating configuration information of a candidate cell is ensured.

[0061] In combination with some embodiments of the first aspect, in some embodiments, the determining that the mobility execution condition corresponding to the candidate cell is met comprises:

[0062] determining that any event associated with the mobility execution condition of the candidate cell is met, and performing the TA measurement for the candidate cell; or

[0063] determining that all events associated with the mobility execution condition of the candidate cell are met, and performing the TA measurement for the candidate cell; or

[0064] the candidate cell is a cell selected by the terminal for access, and the TA measurement for the candidate cell is performed; or

[0065] a cell configuration corresponding to the candidate cell is applied, and the TA measurement for the candidate cell is performed.

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

[0067] sending uplink data to a target cell, and starting a first timer; or

[0068] sending TA information, the TA information being used to indicate time information corresponding to the TA value.

[0069] In the above embodiments, the accuracy of the start timer is extended, thereby ensuring the accuracy of the effective duration of the determined TA.

[0070] In some embodiments of the first aspect, in some embodiments, the time information comprises at least one of:

[0071] a TAT adjustment value;

[0072] a TAT duration;

[0073] a time point of obtaining the TA value.

[0074] A second aspect of the embodiments of the present disclosure provides a TA measurement method, the method is performed by a network device; the method comprises:

[0075] sending configuration information, the configuration information is used to assist a terminal to perform TA measurement to obtain a TA value, and the TA value is used for a conditional mobility procedure.

[0076] In some embodiments of the second aspect, in some embodiments, the TA value is used for a RACH less execution of the conditional mobility procedure.

[0077] In some embodiments of the second aspect, in some embodiments, the configuration information comprises at least one of:

[0078] indication information, the indication information is used to indicate whether the terminal can perform TA measurement;

[0079] time difference information, the time difference information is used to indicate a time difference of downlink information transmission between each two cells.

[0080] In some embodiments of the second aspect, in some embodiments, the time difference information comprises at least one of:

[0081] a time difference of downlink information transmission between a serving cell and each candidate cell in the plurality of candidate cells;

[0082] a time difference of downlink information transmission between a candidate cell configured by the configuration information and another candidate cell;

[0083] a time difference of downlink information transmission between the serving cell and each two cells in the plurality of candidate cells.

[0084] In some embodiments of the second aspect, in some embodiments, the time difference information includes a time difference between downlink information transmission between the serving cell and each of the plurality of candidate cells; or a time difference between downlink information transmission between a candidate cell configured by the configuration information and another candidate cell, the configuration information including the time difference information and a candidate cell related identifier corresponding to the time difference information.

[0085] In some embodiments of the second aspect, in some embodiments, the time difference information includes a time difference between downlink information transmission between the serving cell and each of the plurality of candidate cells; or a time difference between downlink information transmission between a candidate cell configured by the configuration information and another candidate cell, the configuration information including the time difference information and a candidate cell related identifier corresponding to the time difference information.

[0086] In some embodiments of the second aspect, in some embodiments, the method further includes:

[0087] receiving uplink data sent by the terminal, and starting a first timer.

[0088] In a third aspect, the embodiments of the present disclosure provide a TA measurement device, the TA measurement device including at least one of a transceiver module and a processing module; wherein the TA measurement device is configured to perform the optional implementation manners of the first aspect.

[0089] In a fourth aspect, the embodiments of the present disclosure provide a TA measurement device, the TA measurement device including at least one of a transceiver module and a processing module; wherein the TA measurement device is configured to perform the optional implementation manners of the second aspect.

[0090] In a fifth aspect, the embodiments of the present disclosure provide a terminal, including one or more processors; wherein the terminal is configured to perform the method of any one of the first aspect.

[0091] In a sixth aspect, the embodiments of the present disclosure provide a network device, including one or more processors; wherein the network device is configured to perform the method of any one of the second aspect.

[0092] 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 one of the first aspect or the second aspect.

[0093] In an eighth aspect, the embodiments of the present disclosure provide a program product, when the program product is executed by a communication device, causing the communication device to perform the method of any one of the first aspect or the second aspect.

[0094] In a ninth aspect, the embodiments of the present disclosure provide a computer program, which, when running on a communication device, causes the communication device to perform the method of any one of the first aspect or the second aspect.

[0095] In a tenth aspect, the embodiments of the present disclosure provide a chip or a chip system. The chip or the chip system includes processing circuitry configured to perform the method of any one of the first aspect or the second aspect.

[0096] 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 in 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.

[0097] 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.

[0098] 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 some 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, the steps of different embodiments or part or all of the steps of different embodiments can be combined arbitrarily, an embodiment can be combined with the optional implementation manners of other embodiments.

[0099] In each embodiment of the present disclosure, the terms and / or descriptions of the embodiments are consistent and can be referred to each other if there is no special description and logical conflict, and the technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationship.

[0100] The terms used in the embodiments of the present disclosure are only for the purpose of describing specific embodiments, and not as a limitation on the present disclosure.

[0101] In the embodiments of the present disclosure, an element expressed in singular form, such as "a", "an", "the", "said", "the aforementioned", "the foregoing", "this", and the like, unless otherwise specified, can represent "one and only one", or can represent "one or more", "at least one", and the like. For example, in the case of using an article such as "a", "an", "the" in English, the noun after the article can be understood as a singular expression, or can be understood as a plural expression.

[0102] In the embodiments of the present disclosure, "plurality" refers to two or more.

[0103] 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.

[0104] In some embodiments, the description manner such as "at least one of A, B", "A and / or B", "A in one case and B in another case", "in response to a case A, in response to a case B", and the like can include the following technical solutions according to the case: in some embodiments, A is executed regardless of B; in some embodiments, B is executed regardless of A; in some embodiments, A and B are selectively executed from A and B; in some embodiments, A and B are executed (A and B are both executed). When there are more branches such as A, B, C, and the like, it is similar to the above.

[0105] In some embodiments, the description manner such as "A or B" and the like can include the following technical solutions according to the case: in some embodiments, A is executed regardless of B; in some embodiments, B is executed regardless of A; in some embodiments, A and B are selectively executed from A and B. When there are more branches such as A, B, C, and the like, it is similar to the above.

[0106] The prefix words "first", "second", etc. in the embodiments of the present disclosure are merely used to distinguish different description objects, and do not constitute limitation on the position, sequence, 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 redundant limitation because of the use of the prefix words. For example, the description objects are "fields", and the ordinal words before "fields" in "first field" and "second field" do not limit the position or sequence between "fields". "First" and "second" do not limit whether the "fields" modified thereby are in the same message, nor do they limit the sequence of "first field" and "second field". For another example, the description objects are "levels", and the ordinal words before "levels" in "first level" and "second level" do not limit the priority between "levels". For another example, the quantity of the description objects is not limited by the ordinal words, and can be one or more. For example, "first device", wherein the quantity of "devices" can be one or more. In addition, the objects modified by different prefix words can be the same or different. For example, the description objects are "devices", and "first device" and "second device" can be the same device or different devices, and their types can be the same or different. For another example, the description objects are "information", and "first information" and "second information" can be the same information or different information, and their contents can be the same or different.

[0107] In some embodiments, "including A", "containing A", "for indicating A", "carrying A" can be interpreted as directly carrying A, or indirectly indicating A.

[0108] In some embodiments, the terms "time / frequency", "time / frequency domain", etc. refer to the time domain and / or the frequency domain.

[0109] In some embodiments, the terms "in response to", "in response to determining", "in the case of", "when", "when", "if", "if", etc. can be replaced with each other.

[0110] 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", etc. 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", etc. can be replaced with each other.

[0111] In some embodiments, the apparatuses and devices can be interpreted as entities, and can also be interpreted as virtual, whose 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", etc.

[0112] In some embodiments, "network" can be interpreted as an apparatus contained in the network, for example, access network device, core network device, etc.

[0113] In some embodiments, "access network device (AN device)" can also be referred to as "radio access network device (RAN device)", "base station (BS)", "radio base station", "fixed station", and in some embodiments can also be understood as "node", "access point", "transmission point (TP)", "reception point (RP)", "transmission / reception point (TRP)", "panel", "antenna panel", "antenna array", "cell", "macro cell", "small cell", "femto cell", "pico cell", "sector", "cell group", "serving cell", "carrier", "component carrier", "bandwidth part (BWP)", etc.

[0114] In some embodiments, a "terminal" or "terminal device" can be referred to as a "user equipment", "user terminal", "mobile station", "mobile terminal", "subscriber station", "mobile unit", "subscriber unit", "wireless unit", "remote unit", "mobile device", "wireless device", "wireless communication device", "remote device", "mobile subscriber station", "access terminal", "mobile terminal", "wireless terminal", "remote terminal", "handset", "user agent", "mobile client", "client", and so on.

[0115] In some embodiments, data, information, and so on can be acquired in compliance with laws and regulations of a country where a location is situated.

[0116] In some embodiments, data, information, and so on can be acquired after consent of a user is obtained.

[0117] In addition, each element, each row, or each column in a table of the 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.

[0118] FIG. 1 is a schematic diagram of an architecture of a communication system according to an embodiment of the present disclosure. As shown in FIG. 1, the method provided by the 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.

[0119] 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.

[0120] 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.

[0121] 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.

[0122] 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.

[0123] In some embodiments, the core network device can be one device including one or more network elements, or can be multiple 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), for example.

[0124] 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 by the embodiments of the present disclosure. Those skilled in the art can know that the technical solutions proposed by the embodiments of the present disclosure are also applicable to similar technical problems as the system architecture evolves and new business scenarios appear.

[0125] 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 those in 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 be connected or not connected. The connection can be in any manner, can be direct or indirect, and can be wired or wireless.

[0126] 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).

[0127] 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:

[0128] In step S2101, the network device sends configuration information to the terminal.

[0129] In some embodiments, the configuration information is used for assisting the terminal to perform TA measurement to obtain a TA value. Optionally, the TA value is used for a conditional-based mobility procedure. Alternatively, it can also be understood that the configuration information is used for obtaining a TA value for a conditional-based mobility procedure. Alternatively, the TA value can also be used for other types of mobility procedures, which are not limited in the present disclosure

[0130] In some embodiments, the configuration information comprises at least one of the following:

[0131] (1) Indication information, which is used to indicate whether the terminal can perform TA measurement.

[0132] In some embodiments, the indication information comprises one bit, for example, when the bit is 1, it indicates that the terminal can perform TA measurement. For example, when the bit is 0, it indicates that the terminal cannot perform TA measurement.

[0133] In some embodiments, the configuration information contains one or more indication information, each indication information corresponds to a specific candidate cell (neighboring cell), and is used to indicate whether the terminal can perform TA measurement for the candidate cell (neighboring cell). The indication information comprises one bit, for example, when the bit is 1, it indicates that the terminal can perform TA measurement for the candidate cell (neighboring cell). For example, when the bit is 0, it indicates that the terminal cannot perform TA measurement for the candidate cell (neighboring cell).

[0134] In some embodiments, the network device can associate a set ID with the configuration information, and when the set ID corresponding to the serving cell of the terminal and the set ID corresponding to the candidate cell are consistent, TA measurement can be performed on the candidate cell.

[0135] (2) Time difference information, which is used to indicate the time difference of downlink information transmission between each two cells.

[0136] In the embodiments of the present disclosure, each cell can transmit downlink information, and the time difference information is used to indicate the transmission time difference of downlink information transmission between two cells.

[0137] In some embodiments, the time difference information comprises at least one of the following:

[0138] (1) The time difference of downlink information transmission between the serving cell and each of the plurality of candidate cells.

[0139] In some embodiments, the plurality of candidate cells comprises candidate cell A, candidate cell B and candidate cell C; and the time difference information comprises the time difference of downlink information transmission between the serving cell and the candidate cell A, the time difference of downlink information transmission between the serving cell and the candidate cell B, and the time difference of downlink information transmission between the serving cell and the candidate cell C.

[0140] It should be noted that in the case of (1), the configuration information includes time difference information and candidate cell related identifiers corresponding to the time difference information. For example, the configuration information includes time difference information and candidate cell identifiers corresponding to the time difference information. The candidate cell identifiers include any one of candidate configuration identifiers, candidate cell IDs, candidate node IDs, and cell set identifiers.

[0141] It should be noted that the network device in the embodiments of the present disclosure can modify, update or delete the configuration information.

[0142] (2) The time difference between the downlink information transmission of the candidate cell configured by the configuration information and other candidate cells.

[0143] In some embodiments, the configured candidate cell is candidate cell A, and the other candidate cells include candidate cell B and candidate cell C; the time difference information includes the time difference between the downlink information transmission of candidate cell A and candidate cell B, and the time difference between the downlink information transmission of candidate cell B and candidate cell C.

[0144] It should be noted that in the case of (2), the configuration information includes time difference information and candidate cell related identifiers corresponding to the time difference information. For example, the configuration information includes time difference information and candidate cell identifiers corresponding to the time difference information. The candidate cell identifiers include any one of candidate configuration identifiers, candidate cell IDs, candidate node IDs, and cell set identifiers.

[0145] It should be noted that the network device in the embodiments of the present disclosure can modify, update or delete the configuration information.

[0146] It should be noted that the time difference between the downlink information transmission of the candidate cell and other candidate cells can be obtained through interaction between the base stations where the candidate cells are located.

[0147] In some embodiments, the candidate cell can measure the time difference of the downlink information of other candidate cells, and the candidate cell sends the measured transmission time difference of the downlink information to the serving cell.

[0148] Optionally, the candidate cells that need to measure the time difference are located in the same base station, and the candidate base station where the candidate cells are located is responsible for obtaining and sending the transmission time difference to the base station where the serving cell is located. Optionally, the candidate cells that need to measure the time difference are located in different base stations, and any candidate cell candidate base station is responsible for obtaining and sending the transmission time difference to the base station where the serving cell is located.

[0149] In some embodiments, the AMF (Access and Mobility Management Function) can measure the time difference of downlink information between the candidate cell and other candidate cells, and the AMF sends the measured time difference of transmission of downlink information to the serving cell.

[0150] (3) the time difference of downlink information transmission between the serving cell and each two of the plurality of candidate cells.

[0151] In some embodiments, the plurality of candidate cells includes a candidate cell A and a candidate cell B; the time difference information includes the time difference of downlink information transmission between the serving cell and the candidate cell A, the time difference of downlink information transmission between the serving cell and the candidate cell B, and the time difference of downlink information transmission between the candidate cell B and the candidate cell C.

[0152] In some embodiments, in the case of (3), the configuration information includes the time difference information and the identification of the candidate cell and / or the serving cell corresponding to the time difference information. Optionally, the time difference information and the identification of the candidate cell and the identification of the serving cell corresponding to the time difference information (for example, candidate configuration identification, candidate cell ID, candidate node ID, cell set identification). Optionally, if the candidate configuration identification is used, the identification corresponding to the serving cell can be 0 by default; optionally, the identification of the time difference information can also be included.

[0153] It should be noted that the network device in the embodiments of the present disclosure can modify, update or delete the configuration information.

[0154] It should be noted that if the terminal is configured with the time difference of downlink information transmission between the serving cell and the candidate cell, the terminal can perform TA measurement on the candidate cell, and if the terminal is not configured with the time difference of downlink information transmission between the serving cell and the candidate cell, the terminal cannot perform TA measurement on the candidate cell.

[0155] In some embodiments, the configuration information is also used to configure at least one candidate cell. Optionally, the configuration information includes one or more candidate configurations. Each candidate configuration includes one or more candidate cells. It should be noted that the embodiments of the present disclosure take the candidate cell as an example for description. In another embodiment, the candidate cell can also be referred to as a candidate cell group.

[0156] In some embodiments, the configuration information is carried in RRC (Radio Resource Control) signaling or other signaling, which is not limited in the embodiments of the present disclosure.

[0157] In some embodiments, after the configuration information is configured for the terminal, it can be used for cell switching in different cases.

[0158] Optionally, the first network device can control the terminal to change the cell in the multiple candidate cells included in the configuration information through signaling.

[0159] Optionally, the terminal changes the configuration of the cell to the configuration of the candidate cell when the trigger condition configured by the first network device or agreed by the protocol is met. For example, the terminal changes the configuration of the serving cell to the configuration of the candidate cell corresponding to the measurement event A3 or A4 or A5 event when the measurement event is met.

[0160] In some embodiments, the configuration information is used to configure the configuration of at least one candidate cell, and the configuration of the candidate cell can be used for multiple mobility operations, including but not limited to any one or more of the following mobility operations:

[0161] Conditional LTM (conditional LTM)

[0162] LTM;

[0163] CHO (conditional handover);

[0164] CPA (conditional PSCell addition);

[0165] CPC (conditional PSCell change);

[0166] Subsequent CHO (conditional handover);

[0167] Subsequent LTM;

[0168] Subsequent conditional LTM;

[0169] Handover;

[0170] PSCell (primary secondary cell) addition;

[0171] PSCell change;

[0172] SCell (secondary cell) addition;

[0173] SCell change;

[0174] SCell deletion;

[0175] SCell activation and / or deactivation;

[0176] SCG (Secondary Cell group) activation and / or deactivation;

[0177] MCG (Master Cell group) activation and / or deactivation.

[0178] In some embodiments, any one or more of the following can be used for MCG mobility and / or SCG mobility:

[0179] LTM;

[0180] Conditional LTM;

[0181] Subsequent LTM;

[0182] Subsequent Conditional LTM.

[0183] At step S2102, the terminal receives configuration information sent by the network device.

[0184] In the embodiments of the present disclosure, after the terminal receives the configuration information sent by the first network device, the configuration of the corresponding candidate cell and the time difference information can be determined according to the configuration information.

[0185] At step S2103, the terminal performs TA measurement to obtain a TA value.

[0186] In some embodiments, the TA measurement can also be understood as TA calculation based on terminal measurement. In some embodiments, the TA measurement refers to that the terminal calculates the TA value of the target cell according to the TA value of the source cell and the downlink reception timing offset between the source cell and the target cell. Optionally, if the terminal is configured with the downlink transmission time difference between the current serving cell and the candidate cell (or target cell), the downlink transmission time difference needs to be considered when calculating the downlink reception timing offset between the source cell and the target cell.

[0187] In some embodiments, the TA value is used for RACH-less (random access channel-less) execution of the conditional mobility procedure. Wherein, RACH-less refers to reducing the interruption time of the mobility procedure by not performing (or removing) the random access (RACH) procedure during the mobility event (including handover and / or pcell change / addition).

[0188] In some embodiments, the terminal obtains the TA value by using the method shown in FIG. 2B. In this method, the terminal obtains the uplink timing of cell 2 based on the downlink reception timing difference between cell 1 and cell 2, and the uplink timing of cell 1. The calculation method is shown in FIG. 2B: (TA_Cell_2) / 2=(TA_Cell_1) / 2+Rx_Diff

[0189] TA_Cell_1: TA value of cell 1

[0190] TA_Cell_2: TA value of cell 2

[0191] Rx_Diff: downlink reception timing difference between cell 1 and cell 2

[0192] In some embodiments, the terminal obtains the TA value by using the method shown in FIG. 2C. In this method, the terminal obtains the uplink timing of cell 2 based on the downlink reception timing difference between cell 1 and cell 2, the uplink timing of cell 1, and the downlink transmission timing 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

[0193] TA_Cell_1: TA value of cell 1

[0194] TA_Cell_2: TA value of cell 2

[0195] Rx_Diff: downlink reception timing difference between cell 1 and cell 2

[0196] Tx_Diff: downlink transmission timing difference between cell 1 and cell 2

[0197] In some embodiments, the terminal starts the TA measurement based on the configuration information. In the embodiments of the present disclosure, the terminal determines whether to start the TA measurement based on the configuration information after receiving the configuration information.

[0198] Optionally, the terminal receives the configuration of the conditional mobility procedure, and performs the TA measurement on the candidate cell. In the embodiments of the present disclosure, when the terminal receives the configuration information of the conditional mobility procedure configured by the network device, the terminal performs the TA measurement on the candidate cell configured by the network device. Optionally, the configuration of the conditional mobility procedure is carried in the configuration information or other configuration, which is not limited in the embodiments of the present disclosure.

[0199] Optionally, the terminal determines that the mobility execution condition corresponding to the candidate cell is met, and performs the TA measurement.

[0200] Optionally, the TA measurement is performed when it is determined that any one or more of the following conditions is met

[0201] (1) The TA measurement is performed on the candidate cell when it is determined that any event associated with the mobility execution condition of the candidate cell is met.

[0202] In some embodiments, the any event is indicated by an event identity indicated by the network device. Alternatively, the network device includes usage information of the any event in the configuration information.

[0203] Optionally, the any event (or the specific event) corresponding to the execution condition includes that the terminal meets the entering condition corresponding to the event within a triggering duration.

[0204] (2) The TA measurement is performed on the candidate cell when it is determined that the mobility execution condition of the candidate cell is met.

[0205] (3) The TA measurement is performed on the candidate cell when it is determined that all events associated with the mobility execution condition of the candidate cell are met.

[0206] In some embodiments, the terminal meets the first event within a first duration and the terminal meets the second event within a second duration, and then it is determined that all events associated with the mobility execution condition of the candidate cell are met.

[0207] (4) The TA measurement is performed on the candidate cell selected by the terminal as an access cell.

[0208] In some embodiments, the selected cell is one of the cells in which the condition-based mobility is triggered. Optionally, the cell selected by the terminal as an access cell can also be referred to as the selected cell.

[0209] (5) The TA measurement is performed on the candidate cell by applying the cell configuration corresponding to the candidate cell.

[0210] In the embodiments of the present disclosure, if the terminal applies the cell configuration corresponding to the candidate cell, the TA measurement on the candidate cell can be started.

[0211] Optionally, the TA of the candidate cell is invalid, and the TA measurement on the candidate cell is started. Alternatively, it can also be understood that if the TA of the candidate cell is invalid, the terminal restarts the TA measurement on the candidate cell.

[0212] It should be noted that, in the case where the terminal acquires the TA before performing the mobility procedure, the terminal needs to maintain the TAT (timeAlignmentTimer) corresponding to each candidate cell,

[0213] Exemplarily, each candidate cell corresponds to a TAT of the candidate cell. If the TAT of the candidate cell expires, it indicates that the TA of the candidate cell is invalid.

[0214] Exemplarily, one or more candidate cells correspond to a TAT of a candidate cell group (or candidate cell set). If the TAT of the candidate cell group (or candidate cell set) expires, it indicates that the TA of one or more candidate cells in the candidate cell group (or candidate cell set) is invalid.

[0215] Optionally, the configuration information of the candidate cell is updated, and the TA measurement of the candidate cell is started. In some embodiments, the TA of the candidate cell is invalid, including: optionally, the TAT of the candidate cell expires, and it is determined that the TA of the candidate cell is invalid. In some embodiments, if the configuration information of the candidate cell is updated, the terminal deletes the TA value corresponding to the candidate cell, and stops the TAT corresponding to the TA value. If the candidate cell still supports the TA measurement, the TA measurement is re-executed.

[0216] In step S2104, the terminal sends uplink data, and starts the TAT.

[0217] In some embodiments, when the terminal sends the first uplink transmission to the target cell, the terminal starts the TA timer TAT (Time Alignment Timer).

[0218] Exemplarily, the TAT is the TAT corresponding to the PTAG (i.e., the TAT corresponding to the current primary cell).

[0219] Exemplarily, when the target cell receives the first uplink transmission sent by the terminal, the target cell maintains the TA of the terminal according to the configured TAT, and monitors the validity of the TA.

[0220] In step S2105, the network device receives the uplink data, and starts the TAT.

[0221] In the embodiments of the present disclosure, the terminal and the network device agree on the time to start the TAT, so as to ensure the consistency of starting the TAT between the terminal and the network device.

[0222] In some embodiments, when the terminal sends the first uplink transmission to the target cell covered by the network device, the terminal starts the TAT, and at this time, the network device can maintain the validity of the TA of the terminal based on the received uplink transmission, and / or obtain the starting time of the TAT on the terminal side.

[0223] In some embodiments, when the terminal satisfies the execution condition, or the candidate cell becomes the selected cell or the terminal applies the candidate target configuration, the network device and the terminal uniformly determine the starting time of the TAT.

[0224] In some embodiments, the terminal sends the uplink transmission to the target cell through an uplink grant.

[0225] It should be noted that steps S2104 and S2105 are optional steps, and in another embodiment, steps S2104 and S2105 can not be performed, and the terminal sends the TA information, and the network device receives the TA information.

[0226] In some embodiments, the TA information is used to indicate time information corresponding to the TA value. Optionally, the time information includes at least one of the following: a TAT adjustment value, a TAT duration, and a time at which the TA value is obtained. In some embodiments, the time at which the TA value is obtained can be an absolute time, and the time at which the TA value is obtained can be time information of the target cell, which can be indicated by, for example, UTC time, SFN, and subframe time. Optionally, the terminal starts the TAT based on the time information provided by the terminal to indicate that the terminal maintains the TA of the candidate cell (or the TAG corresponding to the candidate cell), and the target cell needs to start the TAT based on the time information provided by the terminal.

[0227] In some embodiments, the terminal has obtained the TA information corresponding to the target cell through TA measurement before sending the uplink or triggering the mobility operation, and has maintained the TAT of the corresponding candidate cell for the target cell. Therefore, when the terminal accesses the target cell, the terminal needs to confirm the TAT of the candidate cell as the TAT corresponding to the primary cell, and send the TA-related time information to the target cell, and the target cell performs TA maintenance based on the time information. Optionally, the target cell is one of the candidate cells preconfigured by the network device.

[0228] For example, the TA-related time information is used to indicate the specific time at which the terminal obtains the TA of the target cell through TA measurement.

[0229] Optionally, the TA-related time information includes any one or more of the following information:

[0230] (1) TAT adjustment value.

[0231] Optionally, the TAT adjustment value is used to indicate how long the candidate TAT corresponding to the target cell has been running when the terminal accesses the target cell.

[0232] (2) TAT duration.

[0233] In some embodiments, the TAT duration is used to indicate the TAT duration corresponding to the target cell when the terminal receives the uplink transmission of the terminal to start the TAT. Optionally, the TAT duration is less than or equal to the duration preconfigured by the network device.

[0234] (3) Effective time of the TA.

[0235] Optionally, the validity time of the TA includes any one or more of the following:

[0236] The time can be absolute time, and the time information can be time information of the target cell, for example, can be indicated by UTC time, SFN and subframe time; when the terminal is instructed to maintain the TA of the candidate cell (or the TA of the candidate cell corresponding to the TAG), the terminal side starts the time corresponding to the TAT, and the target cell needs to maintain the TA of the terminal based on the time at which the terminal starts the TAT.

[0237] In some embodiments, the TA-related time information can be sent to the target cell through RRC, MAC and physical layer messages.

[0238] In some embodiments, the TA-related time information can be contained in the first uplink transmission and sent to the target cell.

[0239] In some embodiments, the TA-related time information can be carried in the RRC reconfiguration completion message and sent to the target cell.

[0240] The TA measurement method related to the embodiments of the present disclosure can include at least one of steps S2101-S2105. For example, at least one of steps S2101-S2105 can be implemented as an independent embodiment, but is not limited thereto.

[0241] In some embodiments, at least one of steps S2101-S2105 is optional, and one or more of the steps can be omitted or replaced in different embodiments.

[0242] In some embodiments, the embodiments of the present disclosure are described by taking steps S2101-S2105 as an example. The execution order of steps S2101-S2105 is not limited, and the execution order of steps S2101-S2105 can be adjusted as appropriate, and the embodiments of the present disclosure are not limited.

[0243] In some embodiments, other optional implementations described before or after the corresponding description of FIG. 2A can be referred to.

[0244] 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", "codepoint", "bit", "data", "program", "chip", and the like can be replaced with each other.

[0245] 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.

[0246] 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, acquiring from protocols, acquiring from higher layers, obtaining by processing oneself, and various meanings such as autonomous implementation.

[0247] In some embodiments, the terms of "send", "transmit", "report", "issue", "transmit", "bidirectional transmission", "send and / or receive" can be replaced with each other.

[0248] In some embodiments, the terms of "time", "time point", "time", "time position" and the like can be replaced with each other, and the terms of "time length", "time period", "time window", "window", "time" and the like can be replaced with each other.

[0249] In some embodiments, the terms "certain", "preset", "pre-set", "set", "indicated", "any", "first", and the like can be replaced with each other, "certain A", "preset A", "pre-set A", "set A", "indicated A", "any A", "first A" can be interpreted as A predetermined in a protocol or the like, or can be interpreted as A obtained by setting, configuration, or indication, or can be interpreted as certain A, any A, or first A, and the like, but are not limited thereto.

[0250] 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 embodiment of the present disclosure relates to a TA measurement method, and the method comprises:

[0251] In step S3101, the terminal receives configuration information sent by the network device.

[0252] 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.

[0253] In step S3102, the terminal performs TA measurement to obtain a TA value.

[0254] 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.

[0255] In step S3103, the terminal sends uplink data and starts TAT.

[0256] 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.

[0257] The TA measurement method involved in 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, and step S3103 can be implemented as an independent embodiment.

[0258] In some embodiments, the embodiments of the present disclosure are exemplified by steps S3101-S3103. The execution order of steps S3101-S3103 is not limited, and the execution order of steps S3101-S3103 can be appropriately adjusted, and the embodiments of the present disclosure are not limited.

[0259] FIG. 3B is a flowchart of a TA measurement method according to an embodiment of the present disclosure, applied to a ground device. As shown in FIG. 3B, the present embodiment of the present disclosure relates to a TA measurement method, and the method comprises the following steps:

[0260] In step S3201, the terminal performs TA measurement to obtain a TA value.

[0261] The optional implementation of step S3201 can refer to the optional implementation of step S2103 in FIG. 2A and other associated parts in the embodiments related to FIG. 2A, which will not be repeated here.

[0262] FIG. 4A is a flowchart 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 embodiment of the present disclosure relates to a TA measurement method, and the method comprises the following steps:

[0263] In step S4101, the network device sends configuration information to the terminal.

[0264] 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 repeated here.

[0265] In step S4102, the network device receives uplink data and starts TAT.

[0266] 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 repeated here.

[0267] The TA measurement method according to the present embodiment of the present disclosure can comprise 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.

[0268] In some embodiments, the present embodiment of the present disclosure is described by taking steps S4101-S4102 as an example. The execution order of steps S4101-S4102 is not limited, and the execution order of steps S4101-S3102 can be appropriately adjusted, which is not limited by the present embodiment of the present disclosure.

[0269] FIG. 4B is a flowchart of a TA measurement method according to an embodiment of the present disclosure, applied to a first network device. As shown in FIG. 4B, the present embodiment of the present disclosure relates to a TA measurement method, and the method comprises the following steps:

[0270] In step S4201, the network device sends configuration information to the terminal.

[0271] The optional implementation of step S4201 can be referred to step S2101 of FIG. 2A and other associated parts in the embodiments of FIG. 2A, which will not be repeated here.

[0272] FIG. 5 is a flow diagram of a TA measurement method according to the embodiments 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:

[0273] Step S5101: The network device sends configuration information.

[0274] The optional implementation of step S5101 can be referred to the optional implementation of step S2101 of FIG. 2A and other associated parts in the embodiments of FIG. 2A, which will not be repeated here.

[0275] Step S5102: The terminal performs TA measurement to obtain a TA value.

[0276] The optional implementation of step S5102 can be referred to step S2103 of FIG. 2A and other associated parts in the embodiments of FIG. 2A, which will not be repeated here.

[0277] In some embodiments, the above method can include the method of the above-mentioned embodiments of the communication system side, the terminal side, the network device side, etc., which will not be repeated here.

[0278] FIG. 6 is a flow diagram of a TA measurement method according to the embodiments 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:

[0279] Step S6101: The network device configures information for assisting "terminal measurement based TA calculation".

[0280] In some embodiments, the terminal measurement based TA calculation can also be referred to as terminal performing TA measurement.

[0281] The embodiments of the present disclosure mainly relate to three aspects: assistance information, TA measurement start and TA validity duration.

[0282] First, the assistance information is used for "terminal measurement based TA calculation".

[0283] In some embodiments, the network side can configure the UE with the transmission time difference information between multiple candidate cells two by two, and the transmission time difference information between the candidate cells and the serving cell, which can be used to assist "terminal measurement based TA calculation".

[0284] Second, TA measurement start

[0285] In the embodiments of the present disclosure, in order to support the RACH-less conditional triggering based mobility procedure (for example, Conditional LTM), the UE needs to have the TA value of the candidate cell which meets the triggering condition valid when accessing the candidate cell, and therefore the UE needs to start the "terminal measurement based TA calculation" in any one of the following cases.

[0286] 1) When the UE receives the configuration information of the CLTM of the conditional triggering based mobility procedure (for example, Conditional LTM) configured by the network side, the UE performs the "terminal measurement based TA calculation" for the candidate cell configured by the network side

[0287] 2) When the UE meets the mobility execution condition corresponding to the candidate cell, the UE performs the "terminal measurement based TA calculation"

[0288] 3) When the TA of the candidate cell is invalid, for example, the TAT of the candidate cell is expired, the UE restarts the "terminal measurement based TA calculation" for the candidate cell

[0289] Third, the validity duration of the TA

[0290] In the embodiments of the present disclosure, for the network side, the network side cannot know the time when the UE acquires the TA of the candidate cell, and therefore the UE and the network side need to unify the starting time of the TAT.

[0291] 1) When the UE sends the first uplink transmission to the target base station, the UE starts the TA timer TAT (Time Alignment Timer)

[0292] 2) In addition, the UE can send the TA related time information to the target cell, and the target cell performs TA maintenance based on the time information, considering the transmission time or the time when the UE has acquired the TA information through the "terminal measurement based TA calculation" before performing the mobility procedure

[0293] It should be noted that the network side needs to configure the corresponding configuration for the terminal in the embodiments of the present disclosure.

[0294] In some embodiments, the network side provides one or more "candidate configurations" (for example, the "candidate configurations" provided by the RRCReconfiguration message, and one "candidate configuration" can include one or more "cell (or cell group) configurations") to the terminal side.

[0295] Optionally, the use of the "candidate configuration" can be at least one of the following:

[0296] Use 1: The network side can subsequently control the terminal to change in multiple "candidate cells (or cell groups)" through signaling (such as "dynamic cell (or cell group) change" in the background art)

[0297] Use 2: The terminal changes the configuration to the candidate cell (or cell group) configuration when meeting the trigger condition configured by the network or agreed by the protocol (such as when the terminal meets the measurement event A3 or A4 or A5 event, the service cell (or cell group) configuration is changed to the corresponding candidate cell (or cell group). Such as "conditional trigger-based mobility process" in the background art.)

[0298] Among them, the trigger condition includes but is not limited to any one or more of the following events: a trigger event corresponding to a cell-level measurement result based on L3 measurement, and / or a trigger event based on a beam-level measurement result based on L1 measurement.

[0299] CondEvent A3: Conditional reconfiguration candidate becomes amount of offset better than PCell / PSCell;

[0300] CondEvent A4: Conditional reconfiguration candidate becomes better than absolute threshold where condEventA4 can also be used for current PSCell (i.e., in case it is configured as candidate PSCell for CondEvent A4 evaluation) for CHO with candidate SCG(s) case;

[0301] CondEvent A5: PCell / PSCell becomes worse than absolute threshold1 AND Conditional reconfiguration candidate becomes better than another absolute threshold2;

[0302] CondEvent D1 : Distance between UE and a reference location referenceLocationl becomes larger than configured threshold distanceThreshFromReference1 and distance between UE and a reference location referenceLocation2 of conditional reconfiguration candidate becomes shorter than configured threshold distanceThreshFromReference2;

[0303] CondEvent D2: Distance between UE and a moving reference location determined based on movingReferenceLocation and its corresponding satellite ephemeris and epoch time broadcast in SIB19 for the serving cell becomes larger than configured threshold distanceThreshFromReference1 and distance between UE and a moving reference location determined based on referenceLocation2 of conditional reconfiguration candidate becomes shorter than configured threshold distanceThreshFromReference2;

[0304] Event LTM2: Beam of serving cell becomes worse than absolute threshold;

[0305] Event LTM3: Beam of candidate cell becomes amount of offset better than beam of serving cell;

[0306] Event LTM4: Beam of candidate cell becomes better than absolute threshold;

[0307] Event LTM5: Beam of serving cell becomes worse than absolute threshold1 AND Beam of candidate cell becomes better than another absolute threshold2.

[0308] Conclusion A3: The offset of the conditional reconfiguration candidate cell is better than PCell / PCell;

[0309] Conclusion A4: The conditional reconfiguration candidate cell becomes better than an absolute threshold, Conclusion tA4 can also be used for the current PSCell (i.e. if it is configured as a candidate PSCell for condEventA4 evaluation) for CHO with candidate SCG;

[0310] Conclusion A5: PCell / PCell is worse than absolute threshold 1, the conditional reconfiguration candidate cell is better than another absolute threshold 2.

[0311] CondEvent D1: The distance of the UE to the reference location referenceLocation1 is greater than the configured threshold distanceThreshFromReference1, the distance of the UE to the reference location referenceLocation2 of the conditional reconfiguration candidate cell is smaller than the configured threshold distanceThreshFromReference2;

[0312] Conclusion D2: The distance between the UE and the mobile reference location based on the mobile reference location and its corresponding satellite ephemeris and SIB19 epoch broadcasted by the serving cell is greater than the configured threshold distanceThreshFromReference1, the distance between the UE and the mobile reference location determined based on the referenceLocation2 of the conditional reconfiguration candidate cell is smaller than the configured threshold distanceThreshFromReference2;

[0313] Event LTM2: The serving cell beam is worse than an absolute threshold;

[0314] Event LTM3: The candidate cell beam offset is better than the serving cell beam;

[0315] Event LTM4: The candidate cell beam is better than an absolute threshold;

[0316] Event LTM5: The serving cell beam is worse than an absolute threshold dl, and the candidate cell beam is better than another absolute threshold d2.

[0317] In some embodiments, the information for assisting the "terminal measurement based TA calculation" comprises at least one of the following:

[0318] A) Indicating information for indicating whether the "terminal measurement based TA calculation" can be performed, for example, the network side can associate a set ID for the candidate configuration, when the set ID corresponding to the serving cell of the UE and the set ID corresponding to the candidate cell are consistent, the "terminal measurement based TA calculation" can be performed on the candidate cell.

[0319] B) Sending time difference information, the network side can configure the UE with the time difference information between two of the candidate cells, and the time difference information between the candidate cell and the serving cell, which can be used to assist the "terminal measurement based TA calculation".

[0320] Optionally, the time difference information includes any one or more of the following cases:

[0321] The first way of configuring the time difference: when configuring the serving cell, the network side can configure the time difference information between the current serving cell and one or more candidate cells; and / or when configuring the candidate cell configuration, the network side configures the UE with the time difference information between the candidate cell and one or more other candidate cells.

[0322] For example, a set of information is configured, each element in the information includes: time difference information and candidate cell related identifier corresponding to the time difference information (for example, candidate configuration identifier, candidate cell ID, candidate node ID, cell set identifier).

[0323] Wherein, the network side can modify, update and delete the time difference information set, the network side can achieve by adding / modifying / deleting the list.

[0324] The second way of configuring the time difference: the network side configures the UE with the downlink time difference between the serving cell and one or more (for example, all) configured candidate cells.

[0325] For example, a set of configuration information is configured, each element in the information includes: time difference information and two candidate cells corresponding to the time difference information and the related identifier of the serving cell (for example, candidate configuration identifier, candidate cell ID, candidate node ID, cell set identifier; if the candidate configuration identifier is used, the identifier corresponding to the serving cell can be 0 by default; and optionally, the time difference information index can be included.

[0326] Among them, the network side can modify, update and delete the time difference information set, and the network side can achieve this by adding / modifying / deleting the list.

[0327] In some embodiments, when the network side triggers the network configured handover, the RRC reconfiguration message corresponding to the handover command can contain the transmission time difference information between the target cell and one or more candidate cells, so that the UE can continue to perform the conditional triggering based mobility procedure after accessing the target cell.

[0328] In some embodiments, the downlink transmission time difference between the candidate cell (candidate cell A) and other candidate cells (candidate cell B) can be obtained by the base station where each candidate cell is located.

[0329] For example, candidate cell A can measure the downlink transmission time difference information with candidate cell B, and candidate cell A measures the information and then sends it to the serving cell.

[0330] It should be noted that if the cells that need to measure the time difference are located in the same base station, the candidate base station where the cells are located is responsible for obtaining the transmission time difference and sending it to the base station where the serving cell is located. Alternatively, if the cells that need to measure the time difference are located in different base stations, any candidate base station of the cells is responsible for obtaining the transmission time difference and sending it to the base station where the serving cell is located.

[0331] Optionally, the downlink transmission time difference between the candidate cell (candidate cell A) and other candidate cells (candidate cell B) is obtained by the AMF, and the AMF sends it to the base station where the serving cell is located after obtaining it.

[0332] Optionally, for example, if the UE is configured with the downlink transmission time difference between the current serving cell and the candidate cell, the UE can perform "terminal measurement based TA calculation" on the corresponding candidate cell, otherwise it does not support "terminal measurement based TA calculation" on the corresponding candidate cell.

[0333] It should be noted that for the subsequent conditional triggering based mobility procedure, the current serving cell can be the target cell of the last execution of the conditional triggering based mobility procedure.

[0334] It should be noted that the "terminal measurement based TA calculation" process is used, i.e., the terminal calculates the "target cell TA value" based on the "source cell TA value" and the "source cell and target cell downlink reception timing offset". If the UE is configured with the downlink transmission time difference between the current serving cell and the candidate cell (or target cell). The downlink transmission time difference needs to be considered when calculating the "source cell and target cell downlink reception timing offset".

[0335] In some embodiments, the UE starts the "terminal measurement based TA calculation" based on the network side configuration information, and performs the corresponding candidate cell TA maintenance.

[0336] In some embodiments, the UE determines whether to support performing "terminal measurement based TA calculation" on the candidate cell based on the auxiliary "terminal measurement based TA calculation" information carried in the network side configuration.

[0337] Optionally, when the UE receives the configuration information of the network side configured conditional trigger based mobility procedure (such as Conditional LTM) CLTM, the UE performs "terminal measurement based TA calculation" for the network side configured candidate cell.

[0338] Optionally, when the UE meets the mobility execution condition corresponding to the candidate cell, the UE performs "terminal measurement based TA calculation".

[0339] In some embodiments, the execution condition of the mobility procedure can be configured by associating one or more events.

[0340] Among them, the specific event can be configured by the following method:

[0341] In some embodiments, among the multiple events corresponding to the execution condition of the candidate cell, the network side indicates an event identifier, such as indicating the measurement identifier corresponding to this event.

[0342] For example, among the multiple events corresponding to the execution condition of the candidate cell, the network side includes indication information in the configuration information of this event.

[0343] In some embodiments, the UE meets the entering condition of all events corresponding to the execution condition, and the UE performs "terminal measurement based TA calculation" on the corresponding candidate cell.

[0344] For example, when the UE meets any event (or specific event) corresponding to the execution condition, the UE performs "terminal measurement based TA calculation" on the corresponding candidate cell.

[0345] Among them, the UE meets any event (or specific event) corresponding to the execution condition includes:

[0346] In some embodiments, the UE meets the entering condition corresponding to each of the events within the triggering duration.

[0347] For example, when the UE meets all the events corresponding to the execution condition, the UE performs the "terminal measurement based TA calculation" for the corresponding candidate cell.

[0348] In some embodiments, the UE meets all the events corresponding to the execution condition (or a specific event) includes:

[0349] In some embodiments, the UE meets the entering condition corresponding to each of the events within the triggering duration TTT1 and the UE meets the entering condition corresponding to each of the events within the triggering duration TTT2.

[0350] For example, when the UE meets all the events corresponding to the execution condition of the candidate cell, it can also be referred to as when the candidate cell becomes a triggering cell, the UE performs the "terminal measurement based TA calculation" for the corresponding candidate cell.

[0351] For example, when the candidate cell becomes a selected cell, the UE performs the "terminal measurement based TA calculation" for the corresponding candidate cell.

[0352] In some embodiments, the selected cell of the UE is one of the multiple triggering cells.

[0353] For example, the UE applies the candidate cell configuration corresponding to the candidate cell, and the UE performs the "terminal measurement based TA calculation" for the corresponding candidate cell.

[0354] In some embodiments, when the TA of the candidate cell is invalid, the UE restarts the "terminal measurement based TA calculation" for the candidate cell.

[0355] It should be noted that for the case of obtaining TA before the UE performs the mobility procedure, the UE needs to maintain the TAT (timeAlignmentTimer) corresponding to each candidate cell, and each candidate cell corresponds to a candidate cell TAT.

[0356] In some embodiments, when the TAT of the candidate cell is timed out, the UE re-performs the "terminal measurement based TA calculation" for the corresponding candidate cell.

[0357] In some embodiments, when the network side updates the information assisting the "terminal measurement based TA calculation", if the assistance information corresponding to the candidate cell is updated, the terminal needs to delete the TA value maintained for the candidate cell and stop the corresponding TAT. If the information is updated, the "terminal measurement based TA calculation" for the candidate cell is still supported, and the UE restarts the "terminal measurement based TA calculation" for the candidate cell.

[0358] For the network side, the network side cannot know the time when the UE acquires the TA of the candidate cell, so the UE and the network side need to unify the starting time of the TAT.

[0359] In some embodiments, when the UE sends the first uplink transmission to the target cell, the UE starts the TA timer TAT (Time Alignment Timer).

[0360] Illustratively, the TAT is the TAT corresponding to the PTAG (i.e. the TAT corresponding to the current primary cell).

[0361] Illustratively, when the target cell receives the first uplink transmission sent by the UE, the target cell maintains the TA of the UE according to the configured TAT and monitors the validity of the TA.

[0362] Illustratively, the scheme is applicable to the case described in the invention point 2, when the UE meets the execution condition, or the candidate cell becomes the selected cell or the UE applies the candidate target configuration, the network side and the UE unify the TAT starting time.

[0363] It should be noted that the UE sends the uplink transmission to the target cell through the uplink grant.

[0364] In some embodiments, considering the transmission time or the time when the UE has acquired the TA information through the "terminal measurement based TA calculation" before performing mobility, the UE can send the TA related time information to the target cell, and the target cell performs TA maintenance based on the time information.

[0365] Illustratively, since there is a certain transmission time between the uplink transmission of the UE and the uplink reception of the target cell, the UE can send the TA related time information to the target cell, and the target cell performs TA maintenance based on the time information.

[0366] Illustratively, the UE can have acquired the TA information corresponding to the target cell (which is one of the candidate cells pre-configured by the network side) through the "terminal measurement based TA calculation" before the uplink transmission or triggering the mobility operation, and has maintained the corresponding candidate cell TAT for the target cell, so when the UE accesses the target cell, it needs to confirm the TAT of the candidate cell as the TAT corresponding to the primary cell, and send the TA related time information to the target cell, and the target cell performs TA maintenance based on the time information.

[0367] Illustratively, the TA related time information is used to indicate the specific time when the UE acquires the TA corresponding to the target cell through the "terminal measurement based TA calculation".

[0368] The time-related information corresponding to the TA includes any one or more of the following information:

[0369] TAT adjustment value: used to indicate how long the candidate TAT corresponding to the target cell has been running when the UE accesses the target cell

[0370] TAT duration: used to indicate the TAT duration corresponding to the target cell when the target cell starts TAT upon receiving the uplink transmission of the UE (the duration is less than or equal to the preconfigured duration on the network side)

[0371] The time at which the TA is acquired includes any one or more of the following:

[0372] In some embodiments, the time can be an absolute time, and the time information can be the time information of the target cell, for example, can be indicated by UTC time, SFN and subframe time; used to indicate the time at which the UE maintains the TA of the candidate cell (or the TAG corresponding to the candidate cell) and the time corresponding to the start of TAT on the UE side, and the target cell needs to maintain the TA of the UE based on the time at which the UE provides the start of TAT.

[0373] For example, the TA-related time information can be sent to the target cell through RRC, MAC and physical layer messages.

[0374] For example, the TA-related time information can be included in the first uplink transmission and sent to the target cell.

[0375] For example, the TA-related time information can be carried in the RRC reconfiguration completion message and sent to the target cell.

[0376] 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.

[0377] The embodiments of the present disclosure also propose a device for implementing any one of the above methods, for example, a device including units or modules for implementing each step performed by the terminal in any one of the above methods. For another example, another device is 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 one of the above methods.

[0378] 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 the functions of any of the above methods or the units or modules 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 the 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 between the 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 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.

[0379] 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), or the like. In another implementation, the processor can implement certain functions through a logical relationship of a 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 an instruction 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), or the like.

[0380] FIG. 7A is a structural schematic diagram of a TA measurement device according to an embodiment of the present disclosure. As shown in FIG. 7A, the TA measurement device 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 perform TA measurement to obtain a TA value, and the TA value is used for a conditional mobility procedure. Optionally, the transceiver module 7101 is configured to perform at least one of the communication steps, such as transmitting and / or receiving, performed by the terminal in any of the above methods, details of which are not described herein. 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 described herein.

[0381] 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 described herein.

[0382] FIG. 7B is a structural schematic diagram of the TA measurement apparatus according to an embodiment 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 transmit configuration information, the configuration information being used by the terminal to perform TA measurement to obtain a TA value, the TA value being used in a conditional mobility procedure. Optionally, the transceiver module 7201 described above is configured to perform at least one of the communication steps such as transmission and / or reception performed by the terminal in any of the methods described above, and details are not described herein again. 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 methods described above, and details are not described herein again.

[0383] 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 methods described above, and details are not described herein again.

[0384] In some embodiments, the transceiver module can include a transmitting module and / or a receiving module, which can be separate or integrated together. Optionally, the transceiver module can be mutually replaced with a transceiver.

[0385] 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.

[0386] FIG. 8A is a structural schematic diagram of a communication device 8100 according to an embodiment of the present disclosure. The communication device 8100 can be a network device (for example, 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 methods described above, or a chip, a chip system, or a processor supporting the terminal to implement any of the methods described above. The communication device 8100 can be used to implement the methods described in the above method embodiments, and details can be referred to the descriptions in the above method embodiments.

[0387] 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 (for example, 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 methods described above.

[0388] 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.

[0389] 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.

[0390] 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.

[0391] 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.

[0392] 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.

[0393] 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.

[0394] The chip 8200 comprises one or more processors 8201, and the chip 8200 is configured to execute any of the above methods.

[0395] 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.

[0396] 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.

[0397] In some embodiments, the terms of interface circuit, interface, transceiver pin, transceiver, etc. can be replaced by each other.

[0398] 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.

[0399] 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.

[0400] 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.

[0401] 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

A TA measurement method characterized by, The method is performed by a terminal, and the method comprises: Performing a timing advance (TA) measurement to obtain a TA value, wherein the TA value is used for a conditional mobility procedure. The method of claim 1, wherein The TA value is used for the conditional mobility procedure, comprising: the TA value is used for a random access channel (RACH) less execution of the conditional mobility procedure. The method of claim 1, wherein The method further comprises: Receiving configuration information, wherein the configuration information is used for assisting the terminal to perform the TA measurement to obtain the TA value. The method according to claim 3, characterized in that The configuration information comprises at least one of the following: Indication information, wherein the indication information is used for indicating whether the terminal can perform the TA measurement; Time difference information, wherein the time difference information is used for indicating a time difference of downlink information transmission between each two cells. The method according to claim 4, characterized in that The time difference information comprises at least one of the following: A time difference of downlink information transmission between a serving cell and each candidate cell in the plurality of candidate cells; A time difference of downlink information transmission between a candidate cell configured by the configuration information and another candidate cell; A time difference of downlink information transmission between the serving cell and each two cells in the plurality of candidate cells. The method according to claim 5, characterized in that The time difference information comprises a time difference of downlink information transmission between the serving cell and each candidate cell in the plurality of candidate cells; or a time difference of downlink information transmission between a candidate cell configured by the configuration information and another candidate cell, wherein the configuration information comprises the time difference information and a candidate cell related identifier corresponding to the time difference information. The method according to claim 5, characterized in that The time difference information comprises a time difference of downlink information transmission between the serving cell and each two cells in the plurality of candidate cells, and the configuration information comprises the time difference information and a candidate cell and / or serving cell identifier corresponding to the time difference information. The method according to any one of claims 2 to 7, characterized in that The method further comprises: Starting the TA measurement based on the configuration information. The method according to any one of cases 1-8, characterized in that The performing of the TA measurement comprises: Receiving configuration of the conditional mobility procedure, and performing the TA measurement on a candidate cell; or, Determining that a mobility execution condition corresponding to the candidate cell is satisfied, and performing the TA measurement; or, TA invalidation of the candidate cell, and starting the TA measurement on the candidate cell; or, Configuration information update of the candidate cell, and starting the TA measurement on the candidate cell. The method of claim 9, wherein The TA invalidation of the candidate cell comprises: TAT timeout of the candidate cell. The method of claim 9, wherein The method further comprises: Deleting a TA value corresponding to the candidate cell, and stopping TAT corresponding to the TA value. The method according to any one of claims 9 to 11, characterized in that The determining that the mobility execution condition corresponding to the candidate cell is satisfied, and performing the TA measurement comprises: Determining that any event associated with the mobility execution condition of the candidate cell is satisfied, and performing the TA measurement on the candidate cell; or, Determining that all events associated with the mobility execution condition of the candidate cell are satisfied, and performing the TA measurement on the candidate cell; or, The candidate cell is a cell selected by the terminal for access, and the TA measurement on the candidate cell is performed; or, A cell configuration corresponding to the candidate cell is applied, and the TA measurement on the candidate cell is performed. The method according to any one of claims 1 to 12, characterized in that The method further comprises: Sending uplink data to a target cell, and starting a first timer; or, Sending TA information, wherein the TA information is used for indicating time information corresponding to the TA value. The method of claim 13, wherein The time information comprises at least one of: a TAT adjustment value; a TAT duration; a time point for obtaining a TA value. A TA measurement method characterized by, The method is performed by a network device, and the method comprises: sending configuration information, the configuration information being used for assisting a terminal to perform TA measurement to obtain a TA value, the TA value being used for a conditional mobility procedure. The method of claim 15, wherein The TA value is used for a RACHless execution of the conditional mobility procedure. The method of claim 15, wherein The configuration information comprises at least one of: indication information, the indication information being used for indicating whether the terminal can perform TA measurement; time difference information, the time difference information being used for indicating a time difference between downlink information transmission of each two cells. The method of claim 17, wherein The time difference information comprises at least one of: a time difference between downlink information transmission of a serving cell and each candidate cell in the plurality of candidate cells; a time difference between downlink information transmission of a candidate cell configured by the configuration information and another candidate cell; a time difference between downlink information transmission of the serving cell and each two cells in the plurality of candidate cells. The method of claim 18, wherein The time difference information comprises a time difference between downlink information transmission of the serving cell and each candidate cell in the plurality of candidate cells, or a time difference between downlink information transmission of a candidate cell configured by the configuration information and another candidate cell, the configuration information comprising the time difference information and a candidate cell related identifier corresponding to the time difference information. The method of claim 18, wherein The time difference information comprises a time difference between downlink information transmission of the serving cell and each two cells in the plurality of candidate cells, the configuration information comprising the time difference information and a candidate cell and / or serving cell identifier corresponding to the time difference information. The method according to any one of claims 15 to 20, characterized in that The method further comprises: receiving uplink data sent by the terminal, and starting a first timer. A TA measurement system characterized by, The network device and the terminal are comprised of: the network device is configured to send configuration information, the configuration information being used for assisting the terminal to perform TA measurement to obtain a TA value, the TA value being used for a conditional mobility procedure; the terminal is configured to perform TA measurement to obtain a TA value. A TA measuring device characterized by comprising: The apparatus comprises: a processing module, configured to perform TA measurement to obtain a TA value, the TA value being used for a conditional mobility procedure. A TA measuring device characterized by comprising: The apparatus comprises: a transceiving module, configured to send configuration information, the configuration information being used for assisting a terminal to perform TA measurement to obtain a TA value, the TA value being used for a conditional mobility procedure. A terminal, characterized by comprising: The terminal comprises: one or more processors; wherein the processor is configured to perform the TA measurement method in any one of claims 1 to 14. A network device, characterized in that The network device comprises: one or more processors; wherein the processor is configured to perform the TA measurement method in any one of claims 15 to 21. A storage medium characterized by comprising: The storage medium stores instructions, when the instructions are run on a communication device, cause the communication device to perform the TA measurement method in any one of claims 1 to 21. A program product, characterized in that The program product, when executed by a communication device, cause the communication device to perform the TA measurement method in any one of claims 1 to 21.

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