Cell selection method, apparatus, and storage medium

Abstract

The present disclosure relates to a cell selection method, device and storage medium. The cell selection method comprises: determining at least one first cell satisfying a mobility condition; determining a cell satisfying a first condition from the at least one first cell as a second cell, the second cell being used for terminal access. The problem that multiple candidate cells cannot be selected due to satisfying the mobility condition is solved. The present disclosure selects a cell satisfying the first condition from at least one cell satisfying the mobility condition for terminal access, thereby ensuring the accuracy of the terminal in selecting the cell for access and further ensuring the communication reliability.

Description

Cell selection methods, devices, and storage media Technical Field

[0001] This disclosure relates to the field of communication technology, and in particular to cell selection methods, apparatus and storage media. Background Technology

[0002] With the rapid development of mobile communication technology, when multiple mobility candidate cells meet the mobility execution conditions, a terminal can select one candidate cell to perform mobility. In related technologies, it is essential to perform early uplink or downlink synchronization (early UL or DL ​​synchronization) on candidate cells for condition-triggered mobility, and to support RACH-less processes during mobility execution. When one or more candidate cells simultaneously meet the execution conditions, the interruption in the mobility process of the cell selected by the terminal may be relatively long.

[0003] Summary of the Invention

[0004] This disclosure addresses the problem that multiple candidate cells cannot be selected when mobility conditions are met. By selecting a cell that meets a first condition from at least one cell that meets mobility conditions for terminal access, this disclosure ensures the accuracy of the cell selected by the terminal for access, thereby guaranteeing communication reliability.

[0005] This disclosure presents cell selection methods, apparatus, and storage media.

[0006] According to a first aspect of the embodiments of this disclosure, a cell selection method is proposed, the method comprising:

[0007] Identify at least one first cell that meets the mobility requirements;

[0008] The cell that meets the first condition among the at least one first cell is determined as the second cell, and the second cell is used for terminal access.

[0009] According to a second aspect of the embodiments of this disclosure, a cell selection method is proposed, the method comprising:

[0010] A first condition is sent to the terminal, the first condition being used to determine a second cell from at least one first cell, the second cell being used for terminal access, and the first cell being a cell that satisfies mobility conditions.

[0011] According to a third aspect of the embodiments of this disclosure, a cell selection method is proposed, the method comprising:

[0012] The network device sends the first condition to the terminal;

[0013] The terminal determines at least one first cell that meets the mobility conditions;

[0014] The terminal determines the cell that meets the first condition among the at least one first cell as the second cell, and the second cell is used for the terminal to access.

[0015] According to a fourth aspect of the embodiments of this disclosure, a cell selection apparatus is provided, comprising:

[0016] A processing module is used to determine at least one first cell that meets the mobility conditions;

[0017] The processing module is further configured to identify a cell among the at least one first cell that meets the first condition as a second cell, and the second cell is used for terminal access.

[0018] According to a fifth aspect of the embodiments of this disclosure, a cell selection apparatus is provided, comprising:

[0019] The transceiver module is used to send a first condition to the terminal, the first condition being used to determine a second cell from at least one first cell, the second cell being used for terminal access, and the first cell being a cell that satisfies mobility conditions.

[0020] According to a sixth aspect of the embodiments of this disclosure, a terminal is provided, comprising:

[0021] One or more processors;

[0022] The terminal is used to execute any of the methods described in the first aspect.

[0023] According to a seventh aspect of the present disclosure, a network device is provided, comprising:

[0024] One or more processors;

[0025] The terminal is used to execute any of the methods described in the second aspect.

[0026] According to an eighth aspect of the embodiments of this disclosure, a communication system is provided, comprising:

[0027] A terminal and a network device, wherein the terminal is configured to implement the cell selection method described in the first aspect, and the network device is configured to implement the cell selection method described in the second aspect.

[0028] According to a ninth aspect of the present disclosure, a storage medium is provided that stores instructions which, when executed on a communication device, cause the communication device to perform the method as described in any one of the first or second aspects.

[0029] According to a tenth aspect of the present disclosure, a computer program product is provided that, when run on a communication device, causes the communication device to perform a feature indication method as described in any one of the first or second aspects. Attached Figure Description

[0030] The accompanying drawings, which are included to provide a further understanding of the embodiments of this disclosure and form part of this disclosure, illustrate exemplary embodiments of this disclosure and, together with their descriptions, serve to explain the embodiments of this disclosure and do not constitute an improper limitation of the embodiments of this disclosure. In the drawings:

[0031] Figure 1 is a schematic diagram of a communication system architecture provided in an embodiment of this disclosure;

[0032] Figure 2 is an interactive schematic diagram of a cell selection method provided in an embodiment of this disclosure;

[0033] Figure 3A is a flowchart of a cell selection method provided in an embodiment of this disclosure;

[0034] Figure 3B is a flowchart of a cell selection method provided in an embodiment of this disclosure;

[0035] Figure 4A is a flowchart of a cell selection method provided in an embodiment of this disclosure;

[0036] Figure 4B is a flowchart of a cell selection method provided in an embodiment of this disclosure;

[0037] Figure 5 is an interactive schematic diagram of a cell selection method according to an embodiment of this disclosure;

[0038] Figure 6 is an interactive schematic diagram of a cell selection method according to an embodiment of this disclosure;

[0039] Figure 7A is a schematic diagram of the structure of a terminal according to an embodiment of the present disclosure;

[0040] Figure 7B is a schematic diagram of the structure of a network device according to an embodiment of the present disclosure;

[0041] Figure 8A is a schematic diagram of a communication device according to an embodiment of the present disclosure;

[0042] Figure 8B is a schematic diagram of a communication device according to an embodiment of the present disclosure. Detailed Implementation

[0043] This disclosure provides a cell selection method, a terminal, and a storage medium.

[0044] In a first aspect, embodiments of this disclosure provide a cell selection method, the method being executed by a terminal, the method comprising:

[0045] Identify at least one first cell that meets the mobility requirements;

[0046] The cell that meets the first condition among the at least one first cell is determined as the second cell, and the second cell is used for terminal access.

[0047] In the above embodiments, the problem of being unable to select a candidate cell that meets the symbol requirements when multiple candidate cells meet mobility conditions is solved. This disclosure ensures the accuracy of the cell selected by the terminal for access by selecting a cell that meets the first condition from at least one cell that meets mobility conditions for the terminal to access, thereby ensuring communication reliability.

[0048] In conjunction with some embodiments of the first aspect, in some embodiments, the first condition includes one or more of the following: the first cell performs RACH-less mobility, performs synchronization, or activates the TCI (Transmission Configuration Indicator) state.

[0049] In conjunction with some embodiments of the first aspect, in some embodiments, the first condition includes one or more of the following:

[0050] The terminal supports RACH-less mobility access to the first cell;

[0051] The first cell has completed downlink synchronization;

[0052] At least one downlink TCI state of the first cell is activated or selected;

[0053] At least one downlink beam of the first cell is activated or selected;

[0054] The Timing Advance (TA) value of the first cell is valid;

[0055] The first cell has completed uplink synchronization;

[0056] At least one uplink TCI state of the first cell is activated or selected;

[0057] At least one uplink beam of the first cell is activated or selected;

[0058] The candidate configuration corresponding to the first cell is decoded and / or its validity is checked.

[0059] In the above embodiments, the possible implementations of the first condition are expanded to ensure the comprehensiveness of the first condition and the reliability of the second cell selected by the terminal based on the first condition.

[0060] In conjunction with some embodiments of the first aspect, in some embodiments, the first cell satisfying the first condition includes multiple cells, and determining the cell satisfying the first condition among the at least one first cell as the second cell includes:

[0061] The cell with the highest cell-level measurement result among the multiple cells that meet the first condition is determined as the second cell;

[0062] The cell with the highest beam measurement result among the multiple cells that meet the first condition is determined as the second cell;

[0063] The cell with the highest measurement result among the activated or selected beams of the multiple cells that meet the first condition is determined as the second cell;

[0064] The cell with the highest measurement result of the best beam among the multiple cells that meet the first condition is determined as the second cell.

[0065] In the above embodiments, if there are multiple first cells that meet the mobility conditions, a first cell will be selected as the second cell based on the measurement results to ensure the accuracy of the selected second cell.

[0066] In conjunction with some embodiments of the first aspect, in some embodiments, the TA value of the first cell is obtained using one or more of the following methods:

[0067] The TA value of the first cell is obtained based on the candidate configuration corresponding to the first cell;

[0068] The TA value of the first cell is obtained based on TA measurement;

[0069] The TA value of the first cell is obtained by the terminal initiating an early RACH on the first cell.

[0070] In the above embodiments, the method of obtaining the TA value of the first cell is extended to ensure the reliability of the obtained TA value.

[0071] In conjunction with some embodiments of the first aspect, in some embodiments, at least one downlink TCI state or beam of the first cell is activated or selected using one or more of the following methods:

[0072] At least one downlink TCI state or beam of the first cell is activated or selected based on the configuration of the network device;

[0073] At least one downlink TCI state or beam of the first cell is activated or selected based on the measurement results.

[0074] In the above embodiments, the method of at least one downlink TCI state or beam activation or selection of the first cell is extended, thereby ensuring the accuracy of at least one downlink TCI state or beam activation or selection of the first cell.

[0075] In conjunction with some embodiments of the first aspect, in some embodiments, at least one uplink TCI state or beam of the first cell is activated or selected using one or more of the following methods:

[0076] At least one uplink TCI state or beam of the first cell is activated or selected based on the configuration of the network device;

[0077] At least one uplink TCI state or beam of the first cell is activated or selected based on the measurement results.

[0078] In the above embodiments, the methods for at least one uplink TCI state or beam activation or selection of the first cell are expanded, thereby ensuring the accuracy of at least one uplink TCI state or beam activation or selection of the first cell.

[0079] In conjunction with some embodiments of the first aspect, in some embodiments, the first cell completes uplink synchronization, including:

[0080] The timing synchronization information and / or frequency synchronization information of the first cell are acquired.

[0081] In conjunction with some embodiments of the first aspect, in some embodiments, the decoding and / or validity check of the candidate configuration corresponding to the first cell includes one or more of the following:

[0082] The terminal supports advance decoding and / or validity checks;

[0083] Early uplink synchronization or early TA acquisition is performed within a first time period before the mobility conditions are met;

[0084] Early downlink synchronization or early TCI state activation is performed within a first duration before the mobility conditions are met.

[0085] In the above embodiments, the method of decoding and / or performing validity checks on the candidate configuration corresponding to the first cell is extended, thereby ensuring the accuracy of decoding and / or performing validity checks on the candidate configuration corresponding to the first cell.

[0086] In conjunction with some embodiments of the first aspect, in some embodiments, the method further includes:

[0087] If the interval between the moment when the first cell meets the first condition and the moment when the mobility trigger event is greater than or equal to a first time threshold, it is determined whether the first cell meets the first condition.

[0088] and / or;

[0089] If the interval between the moment when the first cell meets the first condition and the moment when the mobility trigger event is less than or equal to a second time threshold, it is determined whether the first cell meets the first condition.

[0090] In the above embodiments, the timing of the terminal executing the step of determining whether the first cell meets the first condition is extended, thereby ensuring the accuracy of the terminal execution and thus ensuring the accuracy of obtaining the second cell that meets the first condition.

[0091] In conjunction with some embodiments of the first aspect, in some embodiments, determining whether the first cell satisfies the first condition is achieved when the interval between the moment when the operation performed by the first cell satisfies the first condition and the moment when the mobility triggering event is less than or equal to a first time threshold, including one or more of the following:

[0092] The time interval between the moment when the first cell completes downlink synchronization and the moment when the terminal meets the execution conditions corresponding to the first cell is less than or equal to the second time threshold.

[0093] The time interval between the time of receiving the activation command or selection command for at least one downlink TCI state of the first cell and the time of the terminal satisfying the execution condition corresponding to the first cell is less than or equal to the second time threshold.

[0094] The time interval between the time of receiving the activation command or selection command for at least one downlink beam of the first cell and the time when the terminal meets the execution conditions corresponding to the first cell is less than or equal to a second time threshold.

[0095] The time interval between the acquisition time of the TA value of the first cell and the time interval between the terminal meeting the execution conditions corresponding to the first cell is less than or equal to the second time threshold.

[0096] The time interval between the moment when the first cell completes uplink synchronization and the moment when the terminal meets the execution conditions corresponding to the first cell is less than or equal to the second time threshold.

[0097] The time interval between the time of receiving the activation command or selection command for at least one uplink TCI state of the first cell and the time of the terminal satisfying the execution condition corresponding to the first cell is less than or equal to the second time threshold.

[0098] The time interval between the time of receiving the activation command or selection command for at least one uplink beam of the first cell and the time when the terminal meets the execution conditions corresponding to the first cell is less than or equal to a second time threshold.

[0099] The time interval between the moment when the candidate configuration corresponding to the first cell is decoded and / or the validity check is completed and the moment when the terminal meets the execution condition corresponding to the first cell is less than or equal to the second time threshold.

[0100] In conjunction with some embodiments of the first aspect, in some embodiments, the method further includes:

[0101] Receive condition-triggered mobility configuration and / or measurement configuration.

[0102] In conjunction with some embodiments of the first aspect, in some embodiments, the mobility configuration includes at least one of the following:

[0103] Configure identifiers;

[0104] Candidate community identifier;

[0105] Candidate configurations;

[0106] Execution condition configuration;

[0107] Configure upstream synchronization in advance;

[0108] Reference signal configuration;

[0109] TCI information;

[0110] TA information for candidate cells.

[0111] In the above embodiments, the terminal ensures the accuracy of the configuration by receiving condition-triggered mobility configuration and / or measurement configuration, thereby ensuring the accuracy of subsequently determining the first cell that meets the mobility conditions.

[0112] In conjunction with some embodiments of the first aspect, in some embodiments, the mobility conditions include at least one of the following:

[0113] Execution conditions for L1 (Layer 1) measurement;

[0114] Execution conditions for LTM (L1 / L2 Triggered Mobility) measurement;

[0115] Conditions for performing CSI (Channel State Information) measurements;

[0116] Execution conditions for beam measurement;

[0117] Execution conditions for L3 (Layer 3) measurements;

[0118] Conditions for performing RRM (Radio Resource Management) measurements.

[0119] In the above embodiments, the types of mobility conditions are expanded to ensure the diversity of mobility conditions.

[0120] In conjunction with some embodiments of the first aspect, in some embodiments, the method further includes:

[0121] The first condition is received from the network device.

[0122] Secondly, embodiments of this disclosure provide a cell selection method, the method being executed by a network device, the method comprising:

[0123] A first condition is sent to the terminal, the first condition being used to determine a second cell from at least one first cell, the second cell being used for terminal access, and the first cell being a cell that satisfies mobility conditions.

[0124] In conjunction with some embodiments of the second aspect, in some embodiments, the first condition includes one or more of the following: the first cell performs RACH-less mobility, performs synchronization, or activates a TCI state.

[0125] In conjunction with some embodiments of the second aspect, in some embodiments, the first condition includes one or more of the following:

[0126] The terminal supports RACH-less mobility access to the first cell;

[0127] The first cell has completed downlink synchronization;

[0128] At least one downlink TCI state of the first cell is activated or selected;

[0129] At least one downlink beam of the first cell is activated or selected;

[0130] The TA value of the first cell is valid;

[0131] The first cell has completed uplink synchronization;

[0132] At least one uplink TCI state of the first cell is activated or selected;

[0133] At least one uplink beam of the first cell is activated or selected;

[0134] The candidate configuration corresponding to the first cell is decoded and / or its validity is checked.

[0135] In conjunction with some embodiments of the second aspect, in some embodiments, the first cell satisfying the first condition includes multiple cells;

[0136] The second cell is the cell with the highest cell-level measurement result among the multiple cells that meet the first condition;

[0137] The second cell is the cell with the highest beam measurement result among the multiple cells that meet the first condition;

[0138] The second cell is the cell with the highest measurement result among the activated or selected beams of multiple cells that meet the first condition;

[0139] The second cell is the cell with the highest measurement result of the best beam among the multiple cells that meet the first condition.

[0140] In conjunction with some embodiments of the second aspect, in some embodiments, the TA value of the first cell is obtained using one or more of the following methods:

[0141] The TA value of the first cell is obtained based on the candidate configuration corresponding to the first cell;

[0142] The TA value of the first cell is obtained based on TA measurement;

[0143] The TA value of the first cell is obtained by the terminal initiating an early RACH on the first cell.

[0144] In conjunction with some embodiments of the second aspect, in some embodiments, at least one downlink TCI state or beam of the first cell is activated or selected using one or more of the following methods:

[0145] At least one downlink TCI state or beam of the first cell is activated or selected based on the configuration of the network device;

[0146] At least one downlink TCI state or beam of the first cell is activated or selected based on the measurement results.

[0147] In conjunction with some embodiments of the second aspect, in some embodiments, at least one uplink TCI state or beam of the first cell is activated or selected using one or more of the following methods:

[0148] At least one uplink TCI state or beam of the first cell is activated or selected based on the configuration of the network device;

[0149] At least one uplink TCI state or beam of the first cell is activated or selected based on the measurement results.

[0150] In conjunction with some embodiments of the second aspect, in some embodiments, the first cell completes uplink synchronization, including:

[0151] The timing synchronization information and / or frequency synchronization information of the first cell are acquired.

[0152] In conjunction with some embodiments of the second aspect, in some embodiments, the decoding and / or validity check of the candidate configuration corresponding to the first cell includes one or more of the following:

[0153] The terminal supports advance decoding and / or validity checks;

[0154] Early uplink synchronization or early TA acquisition is performed within a first time period before the mobility conditions are met;

[0155] Early downlink synchronization or early TCI state activation is performed within a first duration before the mobility conditions are met.

[0156] In conjunction with some embodiments of the second aspect, in some embodiments, the method further includes:

[0157] Whether the first cell meets the first condition is determined when the interval between the time when the operation performed in the first cell meets the first condition and the time when the mobility trigger event is greater than or equal to a first time threshold.

[0158] and / or;

[0159] Whether the first cell meets the first condition is determined when the interval between the time when the operation performed in the first cell meets the first condition and the time when the mobility trigger event is less than or equal to a second time threshold.

[0160] In conjunction with some embodiments of the second aspect, in some embodiments, whether the first cell satisfies the first condition is determined when the interval between the time when the operation performed in the first cell satisfies the first condition and the time of the mobility triggering event is less than or equal to a first time threshold, including one or more of the following:

[0161] The time interval between the moment when the first cell completes downlink synchronization and the moment when the terminal meets the execution conditions corresponding to the first cell is less than or equal to the second time threshold.

[0162] The time interval between the time of receiving the activation command or selection command for at least one downlink TCI state of the first cell and the time of the terminal satisfying the execution condition corresponding to the first cell is less than or equal to the second time threshold.

[0163] The time interval between the time of receiving the activation command or selection command for at least one downlink beam of the first cell and the time when the terminal meets the execution conditions corresponding to the first cell is less than or equal to a second time threshold.

[0164] The time interval between the acquisition time of the TA value of the first cell and the time interval between the terminal meeting the execution conditions corresponding to the first cell is less than or equal to the second time threshold.

[0165] The time interval between the moment when the first cell completes uplink synchronization and the moment when the terminal meets the execution conditions corresponding to the first cell is less than or equal to the second time threshold.

[0166] The time interval between the time of receiving the activation command or selection command for at least one uplink TCI state of the first cell and the time of the terminal satisfying the execution condition corresponding to the first cell is less than or equal to the second time threshold.

[0167] The time interval between the time of receiving the activation command or selection command for at least one uplink beam of the first cell and the time when the terminal meets the execution conditions corresponding to the first cell is less than or equal to a second time threshold.

[0168] The time interval between the moment when the candidate configuration corresponding to the first cell is decoded and / or the validity check is completed and the moment when the terminal meets the execution condition corresponding to the first cell is less than or equal to the second time threshold.

[0169] In conjunction with some embodiments of the second aspect, in some embodiments, the method further includes:

[0170] Send condition-triggered mobility configuration and / or measurement configuration.

[0171] In conjunction with some embodiments of the second aspect, in some embodiments, the mobility configuration includes at least one of the following:

[0172] Configure identifiers;

[0173] Candidate community identifier;

[0174] Candidate configurations;

[0175] Execution condition configuration;

[0176] Configure upstream synchronization in advance;

[0177] Reference signal configuration;

[0178] TCI information;

[0179] TA information for candidate cells.

[0180] In conjunction with some embodiments of the second aspect, in some embodiments, the mobility conditions include at least one of the following:

[0181] The conditions for performing L1 measurements;

[0182] Conditions for performing LTM measurements;

[0183] Conditions for performing CSI measurements;

[0184] Execution conditions for beam measurement;

[0185] Execution conditions for L3 measurement;

[0186] Conditions for performing RRM measurements.

[0187] Thirdly, embodiments of this disclosure provide a cell selection method, the method comprising:

[0188] The network device sends the first condition to the terminal;

[0189] The terminal determines at least one first cell that meets the mobility conditions;

[0190] The terminal determines the cell that meets the first condition among the at least one first cell as the second cell, and the second cell is used for the terminal to access.

[0191] Fourthly, embodiments of this disclosure provide a cell selection device, which includes at least one of a transceiver module and a processing module; wherein the cell selection device is used to perform optional implementations of the first and third aspects.

[0192] Fifthly, embodiments of this disclosure provide a cell selection device, which includes at least one of a transceiver module and a processing module; wherein the cell selection device is used to perform optional implementations of the second and third aspects.

[0193] Sixthly, embodiments of this disclosure provide a terminal, including:

[0194] One or more processors;

[0195] The terminal is used to execute the method described in any one of the first and third aspects.

[0196] In a seventh aspect, embodiments of this disclosure provide a network device, including:

[0197] One or more processors;

[0198] The network device is used to perform the method described in any one of the second and third aspects.

[0199] Eighthly, embodiments of this disclosure provide a storage medium storing first information, which, when executed on a communication device, causes the communication device to perform the method as described in any one of the first, second, and third aspects.

[0200] Ninthly, embodiments of this disclosure provide a program product that, when executed by a communication device, causes the communication device to perform the method described in any of the first, second, and third aspects.

[0201] In a tenth aspect, embodiments of this disclosure provide a computer program that, when run on a communication device, causes the communication device to perform the methods described in any of the first, second, and third aspects.

[0202] Eleventhly, embodiments of this disclosure provide a chip or chip system. The chip or chip system includes processing circuitry configured to perform the methods described in any of the first, second, and third aspects.

[0203] It is understood that the aforementioned terminals, storage media, program products, computer programs, chips, or chip systems are all used to execute the methods proposed in the embodiments of this disclosure. Therefore, the beneficial effects they can achieve can be referred to the beneficial effects in the corresponding methods, and will not be repeated here.

[0204] This disclosure provides cell selection methods, apparatus, and storage media. In some embodiments, the terms "cell selection method" and "information processing method" or "cell determination method" can be used interchangeably, as can the terms "cell selection apparatus" and "information processing apparatus" or "cell determination apparatus".

[0205] This disclosure is not exhaustive, but merely an example of some embodiments, and is not intended to limit the scope of protection of this disclosure. Unless otherwise specified, each step in a particular embodiment can be implemented as an independent embodiment, and the steps can be arbitrarily combined. For example, a solution after removing some steps in a particular embodiment can also be implemented as an independent embodiment, and the order of the steps in a particular embodiment can be arbitrarily interchanged. Furthermore, the optional implementation methods in a particular embodiment can be arbitrarily combined; moreover, the embodiments can be arbitrarily combined, for example, some or all steps of different embodiments can be arbitrarily combined, and a particular embodiment can be arbitrarily combined with the optional implementation methods of other embodiments.

[0206] In each of the disclosed embodiments, unless otherwise specified or in case of logical conflict, the terminology and / or descriptions of the embodiments are consistent and can be referenced by each other. Technical features in different embodiments can be combined to form new embodiments based on their inherent logical relationships.

[0207] The terminology used in the embodiments of this disclosure is for the purpose of describing particular embodiments only and is not intended to limit the scope of this disclosure.

[0208] In this embodiment of the disclosure, unless otherwise stated, elements expressed in the singular form, such as "a," "an," "the," "the," "the," "the," "the," "the," "this," etc., can mean "one and only one," or "one or more," "at least one," etc. For example, when using articles such as "a," "an," "the," etc. in translation, the noun following the article can be understood as either a singular expression or a plural expression.

[0209] In the embodiments of this disclosure, "multiple" refers to two or more.

[0210] In some embodiments, the terms “at least one of”, “one or more”, “a plurality of”, “multiple”, etc., may be used interchangeably.

[0211] In some embodiments, the notation "at least one of A and B", "A and / or B", "A in one case, B in another", "in response to one case A, in response to another case B", etc., may include the following technical solutions depending on the situation: in some embodiments, A (execute A regardless of B); in some embodiments, B (execute B regardless of A); in some embodiments, execution is selected from A and B (A and B are selectively executed); in some embodiments, both A and B are executed. The same applies when there are more branches such as A, B, C, etc.

[0212] In some embodiments, the notation "A or B" may include the following technical solutions, depending on the situation: in some embodiments, A (execution of A regardless of B); in some embodiments, B (execution of B regardless of A); in some embodiments, execution is selected from A and B (A and B are selectively executed). The same applies when there are more branches such as A, B, C, etc.

[0213] The prefixes "first," "second," etc., used in the embodiments of this disclosure are merely for distinguishing different descriptive objects and do not impose restrictions on the position, order, priority, quantity, or content of the descriptive objects. The description of the descriptive objects is found in the claims or the context of the embodiments, and the use of prefixes should not constitute unnecessary restrictions. For example, if the descriptive object is a "field," the ordinal numbers preceding "field" in "first field" and "second field" do not restrict the position or order of the "fields." "First" and "second" do not restrict whether the "fields" they modify are in the same message, nor do they restrict the order of "first field" and "second field." Similarly, if the descriptive object is a "level," the ordinal numbers preceding "level" in "first level" and "second level" do not restrict the priority between "levels." Furthermore, the number of descriptive objects is not limited by ordinal numbers and can be one or more. For example, in "first device," the number of "devices" can be one or more. Furthermore, the objects modified by different prefixes can be the same or different. For example, if the object being described is "device", then "first device" and "second device" can be the same device or different devices, and their types can be the same or different. Similarly, if the object being described is "information", then "first information" and "second information" can be the same information or different information, and their content can be the same or different.

[0214] In some embodiments, “including A,” “containing A,” “for indicating A,” and “carrying A” can be interpreted as directly carrying A or indirectly indicating A.

[0215] In some embodiments, the terms “in response to…”, “in response to determining…”, “in the case of…”, “when…”, “if…”, “if…”, etc., can be used interchangeably.

[0216] 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,” and “above” can be used interchangeably, as can 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,” and “below”.

[0217] In some embodiments, the apparatus and device may be interpreted as physical or virtual, and their names are not limited to the names recorded in the embodiments. In some cases, they may also be understood as "equipment", "device", "circuit", "network element", "node", "function", "unit", "section", "system", "network", "chip", "chip system", "entity", "body", etc.

[0218] In some embodiments, "network" can be interpreted as devices included in the network, such as access network devices, core network devices, etc.

[0219] In some embodiments, "access network device (AN device)" may also be referred to as "radio access network device (RAN device)," "base station (BS)," "radio base station," or "fixed station." In some embodiments, it may also be understood as "node," "access point," "transmission point (TP)," "reception point (RP)," "transmission and / or 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," or "bandwidth part (BWP)."

[0220] In some embodiments, "terminal" or "terminal device" may be referred to as "user equipment (UE)," "user terminal," "mobile station (MS)," "mobile terminal (MT)," "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," etc.

[0221] In some embodiments, the acquisition of data, information, etc., may comply with the laws and regulations of the country where the location is situated.

[0222] In some embodiments, data, information, etc., may be obtained with the user's consent.

[0223] Furthermore, each element, each row, or each column in the table of this disclosure can be implemented as an independent embodiment, and any combination of any element, any row, or any column can also be implemented as an independent embodiment.

[0224] Figure 1 is a schematic diagram of the architecture of a communication system according to an embodiment of the present disclosure. As shown in Figure 1, the method provided in this embodiment can be applied to a communication system 100, which may include a terminal 101 and a network device 102. It should be noted that the communication system 100 may also include other devices, and this disclosure does not limit the devices included in the communication system 100.

[0225] In some embodiments, terminal 101 includes, but is not limited to, at least one of the following: mobile phone, wearable device, Internet of Things device, car with communication function, smart car, tablet computer, computer with wireless transceiver function, virtual reality (VR) terminal device, augmented reality (AR) terminal device, wireless terminal device in industrial control, wireless terminal device in self-driving, wireless terminal device in remote medical surgery, wireless terminal device in smart grid, wireless terminal device in transportation safety, wireless terminal device in smart city, and wireless terminal device in smart home.

[0226] In some embodiments, network device 102 may include at least one of access network device and core network device.

[0227] In some embodiments, the access network device is, for example, a node or device that connects a terminal to a wireless network. The access network device may include, but is not limited to, at least one of the following in a 5G communication system: evolved Node B (eNB), next-generation eNB (ng-eNB), next-generation Node B (gNB), node B (NB), home node B (HNB), home evolved node B (HeNB), radio backhaul device, radio network controller (RNC), base station controller (BSC), base transceiver station (BTS), base band unit (BBU), mobile switching center, base station in a 6G communication system, open RAN, cloud RAN, base station in other communication systems, and access node in a Wi-Fi system.

[0228] In some embodiments, the technical solutions of this disclosure can be applied to the Open RAN architecture. In this case, the interfaces between or within access network devices involved in the embodiments of this disclosure can be transformed into internal interfaces of Open RAN. The processes and information interactions between these internal interfaces can be implemented by software or programs.

[0229] In some embodiments, the access network device may be composed of a central unit (CU) and a distributed unit (DU). The CU may also be called a control unit. The CU-DU structure can separate the protocol layer of the access network device. Some of the protocol layer functions are centrally controlled by the CU, while the remaining part or all of the protocol layer functions are distributed in the DU and centrally controlled by the CU. However, this is not the only possibility.

[0230] In some embodiments, a core network device may be a single device comprising one or more network elements, or it may be multiple devices or a group of devices, each comprising all or part of the aforementioned one or more network elements. Network elements may be virtual or physical. The core network may include, for example, at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), or a Next Generation Core (NGC).

[0231] It is understood that the communication system described in this disclosure is for the purpose of more clearly illustrating the technical solutions of this disclosure, and does not constitute a limitation on the technical solutions proposed in this disclosure. As those skilled in the art will know, with the evolution of system architecture and the emergence of new business scenarios, the technical solutions proposed in this disclosure are also applicable to similar technical problems.

[0232] The following embodiments of this disclosure can be applied to the communication system 100 shown in FIG1, or to some of the main bodies, but are not limited thereto. The main bodies shown in FIG1 are illustrative. The communication system may include all or some of the main bodies in FIG1, or may include other main bodies outside of FIG1. ​​The number and form of each main body are arbitrary. Each main body may be physical or virtual. The connection relationship between the main bodies is illustrative. The main bodies may not be connected or may be connected. The connection can be in any way, it can be a direct connection or an indirect connection, it can be a wired connection or a wireless connection.

[0233] The embodiments disclosed herein 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), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), and IEEE 802.20, Ultra-Wideband (UWB), Bluetooth (a registered trademark), Public Land Mobile Network (PLMN) networks, Device-to-Device (D2D) systems, Machine-to-Machine (M2M) systems, Internet of Things (IoT) systems, Vehicle-to-Everything (V2X) systems, systems utilizing other cell selection methods, and next-generation systems built upon them, etc. Furthermore, multiple systems can be combined (e.g., a combination of LTE or LTE-A with 5G).

[0234] This disclosure relates to condition-triggered mobility, which will be described below.

[0235] In some embodiments, condition-triggered mobility may also be referred to as conditional mobility.

[0236] In some embodiments, the terminal obtains the pre-configuration conditions of the network device configuration and the pre-configuration cell or pre-configuration cell group corresponding to the pre-configuration conditions, and then determines whether the pre-configuration conditions are met and whether to change the serving cell to the pre-configuration cell or pre-configuration cell group that meets the pre-configuration conditions.

[0237] In some embodiments, the terminal may also change the configuration of a specific cell or a specific cell group after determining that pre-configuration conditions are met, based on instructions from the network device. For example, the terminal's PCell configuration may be changed from a first configuration of the candidate cell or candidate cell group to a second configuration of the candidate cell or candidate cell group. Optionally, the cell configuration may include radio bearer, cell group, measurement configuration, etc.

[0238] Optionally, mobility in this disclosure includes subsequent mobility (subsequent mobility, continuous mobility, or ongoing mobility).

[0239] For example, subsequent mobility includes any one or more mobility operations that, after a mobility operation is performed, do not cause the terminal to automatically delete the mobility configuration information. The mobility configuration information includes candidate mobility configurations.

[0240] Optionally, mobility operations include at least one of the following:

[0241] (1) Condition switching;

[0242] (2) Conditional LTM;

[0243] (3) Condition PSCell changes;

[0244] (4) Add conditional PSCell;

[0245] (5) Condition SCell changes;

[0246] (6) Add conditional cells;

[0247] (7) Delete conditional cells;

[0248] (8) Mobility based on cell-level measurement results;

[0249] (9) Mobility based on beam-level measurement results;

[0250] (10) Mobility based on L1 measurement results;

[0251] (11) Mobility based on L3 measurement results.

[0252] In some cases, the mobility configuration information can continue to be used to trigger subsequent mobility even without RRC reconfiguration and updates.

[0253] In some embodiments, a condition-triggered mobility process includes at least one of the following:

[0254] (1) Condition-triggered L3 mobility.

[0255] Among them, condition-triggered L3 mobility includes at least one of CHO (Conditional Handover), CPA (Conditional PSCell Addition), CPC (Conditional PSCell Change), CHO with Candidate SCG(s), or CHO with target SCG.

[0256] It should be noted that mobility operations such as CHO, CPA, and CPC all support Subsequent Mobility, that is, Subsequent CHO, Subsequent CPA, and Subsequent CPC.

[0257] Optionally, CHO refers to a handover performed by the UE when one or more handover execution conditions are met. After receiving the CHO configuration, the UE begins to evaluate the execution conditions and stops evaluating the execution conditions after performing a handover (including legacy handover and CHO).

[0258] Optionally, the CHO configuration includes CHO candidate cell configuration and execution conditions. It should be noted that the execution conditions include at least one trigger condition. Optionally, the trigger condition refers to a CHO event. Optionally, CHO events include CHO event A3, CHO event A5, etc. Wherein, CHO event A3: the offset of the candidate cell is better than PCell or PCell. CHO event A5: PCell or PCell is less than an absolute threshold d1, and the candidate cell is higher than another absolute threshold d2.

[0259] Optionally, CPA refers to the terminal performing PSCell addition when the execution conditions are met. The terminal begins evaluating the execution conditions upon receiving the CPA configuration, and stops evaluating the execution conditions once a PCell addition or PCell change is triggered. Here, CPA is triggered by MN, and the execution conditions of CPA are generated by MN, corresponding to the measurement configuration associated with MCG.

[0260] Optionally, when the CPC execution conditions are met, the UE performs PSCell modification. After receiving the CPC configuration, the terminal begins evaluating the execution conditions; once the PCell changes or a PCell change is triggered, the evaluation stops. This includes support for inter-SN CPC initiated by the SN without MN participation, and support for intra-SN CPC initiated by either the MN or the SN.

[0261] Optionally, CHO with target SCG means that the CHO is executed while simultaneously updating the SCG and / or PSCell.

[0262] Optionally, CHO with Candidate SCG refers to triggering changes to MCG or PCell and changes or additions to SCG or PSCell based on conditions.

[0263] Optionally, Subsequent CPAC (Subsequent Conditional PSCell Addition or Change, adding conditional primary and secondary cells).

[0264] In some embodiments, considering conditional handover (CHO) and conditional PSCell change (CPC) or conditional PSCell addition (CPA), a terminal configured with CHO, CPC, or CPA must release the CHO, CPC, or CPA configuration upon completing random access to the target PCell or PSCell. Therefore, if the network does not reconfigure and reinitialize the CHO, CPC, or CPA, the terminal will have no opportunity to subsequently execute CHO, CPC, or CPA. This increases handover or SCG change latency and signaling overhead, especially in FR2 scenarios with frequent CG changes. This leads to the introduction of subsequent CHO or CPAC.

[0265] In some embodiments, Subsequent CPAC refers to a conditional PSCell addition or change process performed based on a pre-configured subsequent CPAC configuration of candidate PSCells after a PSCell is added, changed, or an SCG is released, without requiring reconfiguration and restart of CPC or CPA during the process.

[0266] For subsequent CPAC, after the UE performs one or more operations such as adding a PSCell, changing a PSCell, releasing an SCG, or changing a PCell, the UE will not automatically delete the corresponding conditional reconfiguration information (this is different from legacy CPAC).

[0267] Optionally, Subsequent CHO (Subsequent Conditional Handover) refers to the requirement that a terminal configured with CHO, CPC, or CPA must release its CHO, CPC, or CPA configuration when completing random access to the target PCell or PSCell, considering both conditional handover (CHO) and conditional PSCell change (CPC) or conditional PSCell addition (CPA). Therefore, if the network device does not reconfigure and reinitialize the CHO, CPC, or CPA, the terminal will have no opportunity to continue executing the CHO, CPC, or CPA. This increases the latency of handover or SCG change and increases signal overhead, especially in FR2 scenarios with frequent CG changes. Therefore, Subsequent CHO or CPAC was proposed.

[0268] Therefore, Subsequent CHO may also be supported for CHO in the future.

[0269] Optionally, Subsequent CHO is a pre-configured CHO process executed after mobility occurs, without requiring reconfiguration and restart of the CHO.

[0270] For subsequent CHOs, the terminal will not automatically delete the corresponding conditional reconfiguration (CHO) configuration information after performing one or more of the following operations: switchover, LTM, PSCell addition, PSCell modification, SCG release, PCell change.

[0271] (2) Condition-triggered LTM.

[0272] Optionally, condition-triggered LTM is used for MCG changes or SCG changes.

[0273] For example, condition-triggered LTMs include condition-triggered LTMs for MCGs or condition-triggered LTMs for SCGs.

[0274] In some embodiments, early downlink synchronization with candidate cells is supported during the LTM process. Optionally, the terminal can activate the TCI state of one or more cells different from the current serving cell based on network device configuration or other schemes. For example, the TCI state of these cells can be activated in advance before any LTM candidate cell becomes the serving cell. This allows the UE to perform early downlink synchronization with these candidate cells, thereby enabling a faster handover to one of the candidate cells when a Cell Switch is triggered.

[0275] Optionally, Conditional LTM (Condition-triggered LTM).

[0276] Condition-triggered LTMs can be used for both MCG and SCG changes, including Conditional LTMs for MCG and Conditional LTMs for SCG.

[0277] Optionally, Conditional LTM will be discussed.

[0278] Specify the UE evaluated conditions for triggering LTM.

[0279] The aim is to support conditional LTM, including subsequent LTM.

[0280] Similar to LTM, Conditional LTM will also consider supporting RACH-less and related L1 LTM measurements, etc. For details, please refer to the LTM section.

[0281] Furthermore, Conditional LTM will also consider supporting Subsequent Conditional LTM. Subsequent Conditional LTM refers to Subsequent LTM cell switching procedures between candidate cells without RRC reconfiguration by the network. In other words, after a mobility operation, the UE will not automatically delete the Conditional LTM configuration information. This LTM configuration information can continue to be used to trigger subsequent Conditional LTM (Subsequent Conditional LTM) even without RRC reconfiguration and updates.

[0282] In some embodiments, during the LTM process, early downlink synchronization for candidate cells is supported.

[0283] Optionally, the terminal can activate the TCI state of one or more cells that are different from the current serving cell, based on network configuration or other schemes. For example, the TCI state of these cells can be activated in advance before any LTM candidate cell becomes the serving cell. This allows the terminal to perform downlink synchronization with these candidate cells in advance, thereby enabling a faster handover to one of the candidate cells when a cell switch is triggered.

[0284] In this embodiment of the disclosure, supporting early uplink synchronization can effectively reduce handover interruption time.

[0285] In the existing LTM process triggered by network devices, the network device activates or deactivates the TCI status of one or more cells by sending a Candidate Cell TCI States Activation or Deactivation MAC CE.

[0286] In some embodiments, Candidate Cell TCI States Activation or Deactivation

[0287] Optionally, the network may activate and deactivate the TCI states of LTM candidate cells configured in CandidateTCI-State and CandidateTCI-UL-State by sending the Candidate Cell TCI States Activation or Deactivation MAC CE described in clause 6.1.3.76. The network deactivates the TCI state(s) for one LTM candidate cell by not including the corresponding TCI state ID field(s) in the Candidate Cell TCI States Activation or Deactivation MAC CE.

[0288] Optionally, the MAC entity should:

[0289] (1) If the MAC entity receives a candidate unit TCI state activation or deactivation MAC CE on the service unit:

[0290] (2) Instruct the lower level on information about the activation or deactivation of the candidate cell TCI state MAC CE.

[0291] In some embodiments, during the LTM process, early downlink synchronization for candidate cells is supported.

[0292] Currently, two methods are supported for obtaining the TA values ​​of LTM candidate cells in advance: advance TA acquisition and UE-based TA measurement, to support RACH-less LTM Cell Switching. Performing advance uplink synchronization on candidate cells enables RACH-less LTM Cell Switching, which can effectively reduce data interruptions during handover.

[0293] To better reduce handover interruptions, future 6G mobility needs to support RACH-less handover. Supporting RACH-less handover can effectively reduce handover interruption time with lower complexity. The Early TA acquisition method in LTM can be extended to 6G L3 RACH-less handover.

[0294] Figure 2 is an interactive schematic diagram of a cell selection method according to an embodiment of the present disclosure. As shown in Figure 2, the embodiments of the present disclosure relate to a cell selection method, which includes:

[0295] In step S2101, the network device sends mobility configuration and / or measurement configuration.

[0296] In some embodiments, the terminal receives mobility configuration and / or measurement configuration sent by the network device.

[0297] Optionally, the network device sending mobility configuration and / or measurement configuration includes: the network device sending mobility configuration; correspondingly, the terminal receiving the mobility configuration. Alternatively, the network device sending measurement configuration; correspondingly, the terminal receiving the measurement configuration. Or, the network device sending both mobility configuration and measurement configuration; correspondingly, the terminal receiving both mobility configuration and measurement configuration.

[0298] In some embodiments, mobility configuration includes at least one of the following:

[0299] (1) Configure identifiers.

[0300] In some embodiments, the configuration identifier is used to indicate a mobility configuration. For example, configuration identifier 1 corresponds to mobility configuration A, configuration identifier 2 corresponds to mobility configuration B, and configuration identifier 3 corresponds to mobility configuration C.

[0301] In some embodiments, after receiving a configuration identifier, the terminal looks up the corresponding mobility configuration based on the configuration identifier, and then determines whether the terminal meets the execution conditions of the mobility configuration based on the mobility configuration corresponding to the configuration identifier.

[0302] (2) Candidate cell identifier.

[0303] In some embodiments, the candidate cell identifier is used to indicate a candidate cell. For example, candidate cell identifier 1 corresponds to candidate cell 1, and candidate cell identifier 2 corresponds to candidate cell 2.

[0304] In some embodiments, after receiving a candidate cell identifier, the terminal can determine which candidate cells the mobility configuration is configured for based on the candidate cell identifier, and then determine whether the candidate cell corresponding to the candidate cell identifier meets the execution conditions of the mobility configuration.

[0305] (3) Candidate configurations.

[0306] In some embodiments, the candidate configuration is used to configure candidate cells. Optionally, the candidate configuration includes the time-domain resources, frequency-domain resources, geographical location, etc. of the candidate cells, which is not limited in this embodiment.

[0307] In some embodiments, after receiving the candidate configuration, the terminal can determine the time domain resources, frequency domain resources, geographical location, etc. of the candidate cell, and then determine whether the execution conditions of mobility configuration are met based on the candidate configuration.

[0308] (4) Execution condition configuration.

[0309] In some embodiments, the execution condition configuration is used to configure execution conditions. Optionally, the execution conditions include at least one of the following:

[0310] 1. Execution conditions for L1 measurement.

[0311] 2. Execution conditions for LTM measurement.

[0312] 3. Conditions for performing CSI measurements.

[0313] 4. Execution conditions for beam measurement.

[0314] Optionally, the execution conditions for L1 measurement, LTM measurement, CSI measurement, or beam measurement include at least one of the following events:

[0315] Event 1: The beam quality of the serving cell is less than the absolute threshold.

[0316] Event 2: The beam offset of the candidate cell is higher than that of the serving cell.

[0317] Event 3: The beam quality of the candidate cell is better than the absolute threshold.

[0318] Event 4: The beam quality of the serving cell is less than the first absolute threshold and the beam quality of the candidate cell is greater than the second absolute threshold d2.

[0319] In this embodiment of the disclosure, the terminal can determine whether to execute the measurement corresponding to the execution condition that is met based on the above-mentioned execution conditions. For example, if it is determined that the execution condition for L1 measurement is met, then L1 measurement is executed. Alternatively, if it is determined that the execution condition for LTM measurement is met, then LTM measurement is executed.

[0320] 5. Execution conditions for L3 measurement.

[0321] 6. Conditions for performing RRM measurements.

[0322] Optionally, the execution conditions for L3 measurement or RRM measurement can be any one or more of the following events:

[0323] Event A1: Serving becomes better than absolute threshold.

[0324] Event A2: Serving becomes worse than absolute threshold.

[0325] Event A3: Neighbour becomes a better amount of offset than PCell or PSCell.

[0326] Event A4: Neighbour becomes better than absolute threshold.

[0327] Event A5: The primary cell or primary / secondary cell deteriorates below the absolute threshold d1, while the neighboring cell or secondary cell improves above another absolute threshold d2.

[0328] Event A6: Neighbour becomes a better amount of offset than SCell.

[0329] Event D1: The distance between the terminal and a reference location referenceLocation1 becomes larger than the configured threshold distanceThreshFromReference1, and the distance between the terminal and a reference location referenceLocation2 becomes shorter than the configured threshold distanceThreshFromReference2.

[0330] Event D2: The distance between the serving cell moving reference location determined based on movingReferenceLocation and its corresponding satellite ephemeris and epoch time broadcast in SIB19 and the terminal is greater than the configured threshold distanceThreshFromReference1, and the distance between the UE and a moving reference location determined based on referenceLocation and its corresponding satellite ephemeris and epoch time for the neighbor cell provided in the associated MeasObjectNR is less than the configured threshold distanceThreshFromReference2.

[0331] The following conditional events refer to events used for conditional mobility.

[0332] Conditional event A3: The offset of the candidate cell based on the condition is better than that of the primary cell or the primary / secondary cell.

[0333] Conditional event A4: Conditional reconfiguration candidate becomes better than absolute threshold. condEventA4 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(s) case.

[0334] Conditional Event A5: The primary cell or secondary cell is 1 point worse than the absolute threshold, and the conditional reconfiguration candidate is 2 points better than another absolute threshold.

[0335] Conditional Event D1: The distance between the UE and a reference location referenceLocation1 becomes larger than the configured threshold distanceThreshFromReference1, and the distance between the UE and a reference location referenceLocation2 of conditional reconfiguration candidate becomes shorter than the configured threshold distanceThreshFromReference2.

[0336] Conditional Event D2: The distance between the UE and the serving cell moving reference location determined based on movingReferenceLocation and its corresponding satellite ephemeris and epoch time broadcast in SIB19 becomes larger than the configured threshold distanceThreshFromReference1, and the distance between the UE and a moving reference location determined based on referenceLocation and its corresponding satellite ephemeris and epoch time for the conditional reconfiguration candidate provided in the associated MeasObjectNR becomes shorter than the configured threshold distanceThreshFromReference2.

[0337] Conditional event T1: The time measured at the UE is greater than the configured threshold t1-threshold, but less than t1-threshold+duration.

[0338] Conditional event X1: Serving L2 U2N Relay UE becomes worse than absolute threshold1 AND NR Cell becomes better than another absolute threshold2.

[0339] Conditional event X2: Serving L2 U2N Relay UE becomes worse than absolute threshold.

[0340] For conditional event I1, the measurement reporting event is based on CLI measurement results, which can be derived from either SRS-RSRP or CLI-RSSI.

[0341] Conditional event I1: Interference becomes higher than the absolute threshold.

[0342] Reporting events concerning Aerial UE altitude are labeled HN, with N equal to 1 and 2 respectively. Additionally, reporting events involving both Aerial UE altitude and neighboring cell measurements are labeled AMHN, with M = 3, 4, 5 and N = 1, 2.

[0343] Conditional event H1: Aerial UE altitude becomes higher than a certain threshold.

[0344] Conditional event H2: Aerial UE altitude becomes lower than a threshold.

[0345] Conditional event A3H1: Neighbour offset is better than SpCell and the Aerial UE altitude is higher than a threshold.

[0346] Conditional event A3H2: Neighbour becomes offset better than SpCell and the Aerial UE altitude becomes lower than a threshold.

[0347] Conditional event A4H1: Neighbour becomes better than threshold1 and the Aerial UE altitude becomes higher than a threshold2.

[0348] Conditional event A4H2: Neighbour becomes better than threshold1 and the Aerial UE altitude becomes lower than a threshold2.

[0349] Conditional event A5H1: SpCell becomes worse than threshold1, neighbor becomes better than threshold2, and the Aerial UE altitude becomes higher than a threshold3.

[0350] Conditional event A5H2: SpCell becomes worse than threshold1, neighbor becomes better than threshold2, and the Aerial UE altitude becomes lower than a threshold3.

[0351] (5) Configure uplink synchronization in advance.

[0352] In some embodiments, the advance uplink synchronization configuration is used to configure advance uplink synchronization information for the terminal to perform advance uplink synchronization.

[0353] In some embodiments, after receiving the early uplink synchronization configuration, if the terminal needs to perform early uplink synchronization later, it will perform early uplink synchronization based on the early uplink synchronization configuration.

[0354] (6) Reference signal configuration.

[0355] In some embodiments, the reference signal configuration includes time-domain resources, frequency-domain resources, etc. of the reference signal, and the embodiments disclosed herein do not limit this.

[0356] In some embodiments, after receiving the reference signal configuration, the terminal can perform measurements based on the time-domain resources, frequency-domain resources, etc. indicated by the reference signal configuration to obtain the measurement results corresponding to the reference signal configuration.

[0357] (7) TCI information.

[0358] In some embodiments, after receiving the TCI information, the terminal can determine the TCI status of each cell and subsequently perform TCI status activation or deactivation.

[0359] (8) TA information of candidate cells.

[0360] In some embodiments, after receiving the TA information of the candidate cell, the terminal can perform advance synchronization based on the TA information.

[0361] It should be noted that the above mobility configurations may include multiple items, and the following describes the possible configurations.

[0362] For example, the mobility configuration includes configurations (2), (4) and (6). In this embodiment of the present disclosure, after the terminal receives configurations (2), (4) and (8), it can determine the candidate cell with the mobility configuration, the execution conditions of the measurement, the reference signal configuration and the TA information of the candidate cell. The terminal can perform the measurement based on the reference signal configuration if the execution conditions are met.

[0363] For example, the mobility configuration includes configurations (2), (4), (6) and (8). In this embodiment of the present disclosure, after the terminal receives configurations (2), (4), (6) and (8), it can determine the candidate cell with the mobility configuration, the execution conditions of the measurement, the reference signal configuration, and the TA information of the candidate cell. The terminal can perform the measurement based on the reference signal configuration when the execution conditions are met, and perform advance synchronization based on the TA information when synchronization is required.

[0364] It should be noted that the embodiments disclosed herein are merely illustrative examples, and the mobility configuration may also include other configurations. The terminal can perform the corresponding operations according to the configuration. The embodiments disclosed herein do not limit the content included in the mobility configuration.

[0365] In some embodiments, the measurement configuration includes any one or more of the following measurement configurations:

[0366] (1) L1 measurement configuration.

[0367] (2) LTM measurement configuration.

[0368] (3) CSI measurement configuration.

[0369] (4) Beam measurement configuration.

[0370] (5) L3 measurement configuration.

[0371] (6) RRM measurement configuration.

[0372] In this embodiment of the disclosure, after receiving the measurement configuration, the terminal can perform measurements based on the measurement configuration. For example, if the terminal receives an L1 measurement configuration, it can perform L1 measurements based on the L1 measurement configuration. As another example, if the terminal receives an LTM measurement configuration, it can perform LTM measurements based on the LTM measurement configuration.

[0373] It should be noted that the above measurement configurations may include multiple options, and the following describes the possible configurations.

[0374] For example, the measurement configuration includes (3) and (6), wherein the terminal performs CSI measurement based on the CSI measurement configuration in (3) and performs RRM measurement based on the RRM measurement configuration in (6).

[0375] For example, the measurement configuration includes (1), (3) and (5), wherein the terminal performs L1 measurement based on the L1 measurement configuration in (1), performs CSI measurement based on the CSI measurement configuration in (3), and performs L3 measurement based on the L3 measurement configuration in (5).

[0376] It should be noted that the embodiments disclosed herein are merely illustrative examples, and the measurement configuration may also include other configurations. The terminal can perform the corresponding measurement according to the configuration. The embodiments disclosed herein do not limit the content included in the measurement configuration.

[0377] It should be noted that step S2101 in this embodiment can be executed once, and the terminal can subsequently perform operations multiple times based on mobility configuration and / or measurement configuration.

[0378] Step S2102: The network device sends the first condition.

[0379] In some embodiments, the terminal receives a first condition. Alternatively, the network device sends a first condition to the terminal; correspondingly, the terminal receives the first condition sent by the network device.

[0380] In some embodiments, after receiving the first condition, the terminal can perform subsequent steps S2104 based on the first condition to determine the second cell that meets the first condition.

[0381] The first point to note is that this embodiment does not limit the execution order of steps S2101 and S2102, and step S2102 may be executed before step S2101.

[0382] The second point to note is that the first condition is included in the mobility configuration. In this case, step S2102 can be skipped, and step S2101 can be executed directly, with the first condition carried over through the mobility configuration in step S2101.

[0383] The third point to note is that the first condition can also be determined by the communication protocol rather than by the network device configuration.

[0384] In some embodiments, the first condition includes one or more of the following:

[0385] (1) The terminal supports RACH-less mobility access to the first cell.

[0386] In some embodiments, RACH-less mobility can be any one or more of RACH-less HO, RACH-less LTM Cell Switch, RACH-less Conditional HO, and RACH-less Conditional LTM.

[0387] In some embodiments, the terminal supports access to the first cell based on RACH-less mobility, including: the terminal can access the first cell through RACH-less mobility, or the terminal is able to access the first cell through RACH-less mobility, and this disclosure does not limit this.

[0388] (2) The first cell has completed downlink synchronization.

[0389] In some embodiments, downlink synchronization of the first cell is completed, including: the terminal performs downlink synchronization on the first cell, or the terminal completes downlink synchronization on the first cell.

[0390] (3) At least one downlink TCI state of the first cell is activated or selected.

[0391] In some embodiments, at least one downlink TCI state of the first cell is activated or selected, including: the terminal activates or selects at least one downlink TCI state of the first cell, or the first cell has at least one downlink TCI state.

[0392] In some embodiments, the downlink TCI state can also be a joint TCI state, which is not limited in this disclosure.

[0393] (4) At least one downlink beam of the first cell is activated or selected.

[0394] In some embodiments, at least one downlink beam of the first cell is activated or selected, including: the terminal activates or selects at least one downlink beam of the first cell, or the first cell has at least one downlink beam.

[0395] (5) The TA value of the first cell is valid.

[0396] In some embodiments, the validity of the TA value of the first cell can also be understood as the terminal obtaining the TA value of the first cell.

[0397] (6) The first cell has completed uplink synchronization.

[0398] In some embodiments, uplink synchronization of the first cell is completed, including: the terminal performs uplink synchronization on the first cell, or the terminal completes uplink synchronization on the first cell.

[0399] (7) At least one uplink TCI state of the first cell is activated or selected.

[0400] In some embodiments, at least one uplink TCI state of the first cell is activated or selected, including: the terminal activates or selects at least one uplink TCI state of the first cell, or the first cell has at least one uplink TCI state.

[0401] In some embodiments, the uplink TCI state can also be a joint TCI state, which is not limited in this disclosure.

[0402] (8) At least one uplink beam of the first cell is activated or selected.

[0403] In some embodiments, at least one uplink beam of the first cell is activated or selected, including: the terminal activates or selects at least one uplink beam of the first cell, or the first cell has at least one uplink beam.

[0404] (9) The candidate configuration corresponding to the first cell is decoded and / or its validity is checked.

[0405] In some embodiments, the candidate configuration corresponding to the first cell is decoded and / or its validity is checked, including: the terminal has performed decoding and / or validity checks on the candidate configuration corresponding to the first cell.

[0406] It should be noted that, in this embodiment of the disclosure, the first cell refers to a cell that meets the mobility conditions. Alternatively, it can be understood that the first cell is the cell that meets the mobility conditions determined in step S2101 above.

[0407] In some embodiments, the network device can configure the first condition via indication information.

[0408] For example, if the indication information is set to a specific value 1 or the indication information 1 is configured, then the first indication condition is that the terminal supports RACH-less mobility access to the first cell in (1).

[0409] For example, if the indication information is set to a specific value 2 or if indication information 2 is configured, then the first condition indicating that the first cell has completed downlink synchronization is (2).

[0410] For example, if the indication information is set to a specific value 3 or the indication information 3 is configured, then the indication first condition is that at least one downlink TCI state of the first cell in (3) is activated or selected.

[0411] For example, if the indication information is set to a specific value 4 or the indication information 4 is configured, then the first condition is that at least one downlink beam of the first cell in (4) is activated or selected.

[0412] For example, if the indication information is set to a specific value 5 or the indication information 5 is configured, then the first condition is that the TA value of the first cell in (5) is valid.

[0413] For example, if the indication information is set to a specific value 6 or the indication information 6 is configured, then the first condition is that the first cell in (6) has completed uplink synchronization.

[0414] For example, if the indication information is set to a specific value 7 or the indication information 7 is configured, then the indication first condition is that at least one uplink TCI state of the first cell in (7) is activated or selected.

[0415] For example, if the indication information is set to a specific value 8 or the indication information 8 is configured, then the first condition is that at least one uplink beam of the first cell in (8) is activated or selected.

[0416] For example, if the indication information is set to a specific value 9 or the indication information 9 is configured, then the candidate configuration corresponding to the first cell in the first condition (9) is decoded and / or the validity check is completed.

[0417] In some embodiments, the network side can configure the first condition via a bitstream.

[0418] For example, if the first bit of this bitstream is a specific value, such as true or 1, it indicates that the first condition is that the terminal supports RACH-less mobility access to the first cell.

[0419] For example, if the second bit of this indication information is a specific value such as true or 1, it indicates that the first condition is that the first cell has completed downlink synchronization.

[0420] For example, if the third bit of this indication information is a specific value such as true or 1, it indicates that the first condition is that at least one downlink TCI state of the first cell is activated or selected.

[0421] For example, if the fourth bit of this indication information is a specific value such as true or 1, it indicates that the first condition is that at least one downlink beam of the first cell is activated or selected.

[0422] For example, if the fifth bit of this indication information is a specific value such as true or 1, then the first condition is that the TA value of the first cell is valid.

[0423] For example, if the sixth bit of this indication information is a specific value such as true or 1, it indicates that the first condition is that the first cell has completed uplink synchronization.

[0424] For example, if the seventh bit of this indication information is a specific value such as true or 1, it indicates that the first condition is that at least one uplink TCI state of the first cell is activated or selected.

[0425] For example, if the eighth bit of this indication information is a specific value such as true or 1, it indicates that the first condition is that at least one uplink beam of the first cell is activated or selected.

[0426] For example, if the ninth bit of this indication information is a specific value such as true or 1, it indicates that the first condition is that the candidate configuration corresponding to the first cell has been decoded and / or the validity check has been completed.

[0427] In some embodiments, if the network device indicates multiple conditions as described in the above embodiments, any of the following schemes are adopted.

[0428] The first approach: The terminal determines that the first condition is met when it determines that at least one or any one of the multiple conditions is met.

[0429] The second approach: When the terminal determines that all conditions among multiple conditions are met, it then determines that the first condition is met.

[0430] It should be noted that this embodiment is illustrated using an example of a network device configured with multiple conditions. In another embodiment, if the protocol stipulates multiple conditions, either of the two schemes described above can be used to determine whether the first condition is met; this embodiment does not limit this approach.

[0431] It should be noted that the above embodiments involve the description of various first conditions. The operation or state corresponding to the first cell will be described below.

[0432] In some embodiments, the TA value of the first cell is obtained using one or more of the following methods:

[0433] (1) The TA value of the first cell is obtained based on the candidate configuration corresponding to the first cell.

[0434] In some embodiments, the terminal may obtain the TA value of the first cell based on the candidate configuration corresponding to the first cell.

[0435] (2) The TA value of the first cell is obtained based on TA measurement.

[0436] In some embodiments, the terminal may obtain the TA value of the first cell based on TA measurement.

[0437] (3) The TA value of the first cell is obtained by the terminal in advance through RACH on the first cell.

[0438] In some embodiments, the terminal may initiate an early RACH on the first cell to obtain the TA value of the first cell.

[0439] Optionally, the terminal can obtain the uplink timing of the terminal in the first cell based on the downlink reception timing deviation between the first cell and the second cell, the uplink timing of the terminal in the second cell, and the downlink transmission time difference between the first cell and the second cell.

[0440] Where (TA_Cell_1) or 2 = (TA_Cell_2) or 2 + Rx_Diff - Tx_Diff. Where TA_Cell_1: the TA value of the first cell; TA_Cell_2: the TA value of the second cell; Rx_Diff: the downlink reception timing deviation between the first and second cells; Tx_Diff: the downlink transmission time difference between the first and second cells.

[0441] In some embodiments, at least one downlink TCI state or beam of the first cell is activated or selected using one or more of the following methods:

[0442] (1) At least one downlink TCI state or beam of the first cell is activated or selected based on the configuration of the network device.

[0443] In some embodiments, the network device is configured to indicate the activation or selection of at least one downlink TCI state or beam of the first cell.

[0444] In some embodiments, at least one downlink TCI state or beam of the first cell is activated or selected based on the configuration of the network device, including: the terminal activating or selecting at least one downlink TCI state or beam of the first cell based on the configuration of the network device.

[0445] It should be noted that the embodiments disclosed herein are illustrated by activating or selecting at least one downlink TCI state or beam of the first cell based on the configuration of the network device. In another embodiment, at least one downlink TCI state or beam of the first cell is deactivated or deleted based on the configuration of the network device.

[0446] In some embodiments, the network device configuration includes Candidate Cell TCI States Activation or Deactivation MAC CE or other configurations, which are not limited in this disclosure.

[0447] (2) At least one downlink TCI state or beam of the first cell is activated or selected based on the measurement results.

[0448] In some embodiments, the measurement result is used to indicate the activation or selection of at least one downlink TCI state or beam of the first cell. Optionally, the measurement result refers to the measurement result of at least one downlink TCI state of the first cell. Optionally, the measurement result includes at least one of RSRQ, RSRP, or SINR, or may be other measurement results, which are not limited in this disclosure.

[0449] In some embodiments, at least one downlink TCI state or beam of the first cell is activated or selected based on measurement results, including: the terminal activating or selecting at least one downlink TCI state or beam of the first cell based on measurement results.

[0450] It should be noted that the embodiments disclosed herein are illustrated by activating or selecting at least one downlink TCI state or beam of the first cell based on measurement results. In another embodiment, at least one downlink TCI state or beam of the first cell is deactivated or deleted based on measurement results.

[0451] Optionally, the TCI state or beam with the best measurement results can be activated or selected. Alternatively, the TCI state or beam whose measurement results meet the network configuration conditions can be activated or selected. For example, if the network device configures a threshold value, the terminal can select or activate the TCI state or beam whose measurement results meet the threshold value requirements.

[0452] In some embodiments, at least one uplink TCI state or beam of the first cell is activated or selected using one or more of the following methods:

[0453] (1) At least one uplink TCI state or beam of the first cell is activated or selected based on the configuration of the network device.

[0454] (2) At least one uplink TCI state or beam of the first cell is activated or selected based on the measurement results.

[0455] The uplink TCI state or beam scheme is similar to the downlink TCI state or beam scheme in the above embodiments, and will not be described again here.

[0456] In some embodiments, the first cell completes uplink synchronization, including: the timing synchronization information and / or frequency synchronization information of the first cell are acquired.

[0457] In some embodiments, the decoding and / or validity check of the candidate configuration corresponding to the first cell includes one or more of the following:

[0458] (1) The terminal supports advance decoding and / or validity checks.

[0459] (2) Early uplink synchronization or early TA acquisition is performed within the first time period before the mobility conditions are met.

[0460] (3) Early downlink synchronization or early TCI state activation is performed within the first time period before the mobility conditions are met.

[0461] Optionally, the first cell in this embodiment of the disclosure may also be a first cell pair. Optionally, the first cell pair includes PCell and PSCell.

[0462] Optionally, step S2102 in this embodiment of the present disclosure can be executed once, and the terminal can then determine the second cell that meets the first condition multiple times based on the first condition obtained this time without having to obtain the first condition again for a period of time.

[0463] Step S2103: The terminal determines at least one first cell that meets the mobility conditions.

[0464] In some embodiments, mobility conditions include at least one of the following:

[0465] (1) Execution conditions for L1 measurement.

[0466] (2) Execution conditions for LTM measurement.

[0467] (3) Conditions for performing CSI measurements.

[0468] (4) Execution conditions for beam measurement.

[0469] (5) Execution conditions for L3 measurement.

[0470] (6) Conditions for performing RRM measurements.

[0471] The mobility conditions are similar to those in the above embodiments and will not be repeated here.

[0472] Step S2104: The terminal determines at least one cell in the first cell that meets the first condition as the second cell.

[0473] In some embodiments, the first condition includes one or more of the following:

[0474] (1) The terminal supports RACH-less mobility access to the first cell.

[0475] In some embodiments, RACH-less mobility can be any one or more of RACH-less HO, RACH-less LTM Cell Switch, RACH-less Conditional HO, and RACH-less Conditional LTM.

[0476] In some embodiments, the terminal supports access to the first cell based on RACH-less mobility, including: the terminal can access the first cell through RACH-less mobility, or the terminal is able to access the first cell through RACH-less mobility, and this disclosure does not limit this.

[0477] (2) The first cell has completed downlink synchronization.

[0478] In some embodiments, downlink synchronization of the first cell is completed, including: the terminal performs downlink synchronization on the first cell, or the terminal completes downlink synchronization on the first cell.

[0479] (3) At least one downlink TCI state of the first cell is activated or selected.

[0480] In some embodiments, at least one downlink TCI state of the first cell is activated or selected, including: the terminal activates or selects at least one downlink TCI state of the first cell, or the first cell has at least one downlink TCI state.

[0481] In some embodiments, the downlink TCI state can also be a joint TCI state, which is not limited in this disclosure.

[0482] (4) At least one downlink beam of the first cell is activated or selected.

[0483] In some embodiments, at least one downlink beam of the first cell is activated or selected, including: the terminal activates or selects at least one downlink beam of the first cell, or the first cell has at least one downlink beam.

[0484] (5) The TA value of the first cell is valid.

[0485] In some embodiments, the validity of the TA value of the first cell can also be understood as the terminal obtaining the TA value of the first cell.

[0486] (6) The first cell has completed uplink synchronization.

[0487] In some embodiments, uplink synchronization of the first cell is completed, including: the terminal performs uplink synchronization on the first cell, or the terminal completes uplink synchronization on the first cell.

[0488] (7) At least one uplink TCI state of the first cell is activated or selected.

[0489] In some embodiments, at least one uplink TCI state of the first cell is activated or selected, including: the terminal activates or selects at least one uplink TCI state of the first cell, or the first cell has at least one uplink TCI state.

[0490] In some embodiments, the uplink TCI state can also be a joint TCI state, which is not limited in this disclosure.

[0491] (8) At least one uplink beam of the first cell is activated or selected.

[0492] In some embodiments, at least one uplink beam of the first cell is activated or selected, including: the terminal activates or selects at least one uplink beam of the first cell, or the first cell has at least one uplink beam.

[0493] (9) The candidate configuration corresponding to the first cell is decoded and / or its validity is checked.

[0494] In some embodiments, the candidate configuration corresponding to the first cell is decoded and / or its validity is checked, including: the terminal has performed decoding and / or validity checks on the candidate configuration corresponding to the first cell.

[0495] It should be noted that, in this embodiment of the disclosure, the first cell refers to a cell that meets the mobility conditions. Alternatively, it can be understood that the first cell is the cell that meets the mobility conditions determined in step S2101 above.

[0496] In some embodiments, the terminal determines that the first condition is met when it determines that at least one of a plurality of conditions is met.

[0497] In some embodiments, the terminal determines that the first condition is met when it determines that all of the multiple conditions are met.

[0498] In some embodiments, if a first cell that satisfies the first condition includes a plurality of first cells, then the method for determining a second cell from the plurality of first cells that satisfy the first condition includes one or more of the following.

[0499] (1) The first cell with the highest cell-level measurement result among multiple first cells is determined as the second cell.

[0500] (2) The first cell with the highest beam measurement result among multiple first cells is determined as the second cell.

[0501] (3) The first cell with the highest measurement result among the activated or selected beams in the multiple first cells is determined as the second cell.

[0502] (4) The first cell with the highest measurement result of the best beam among multiple first cells is determined as the second cell.

[0503] It should be noted that the embodiments disclosed herein are illustrated using the example of a terminal directly determining a cell that meets the first condition. In another embodiment, the interval between the moment the first cell meets the first condition and the moment of the mobility triggering event is greater than or equal to a first time threshold to determine whether the first cell meets the first condition. Alternatively, it can be understood that the interval between the moment the operation performed by the first cell meets the first condition and the moment of the mobility triggering event is greater than or equal to a first time threshold to determine whether the first cell meets the first condition.

[0504] Optionally, if the interval between the moment when the operation performed by the first cell satisfies the first condition and the moment when the mobility trigger event occurs is less than or equal to a second time threshold, it is determined whether the first cell satisfies the first condition, including one or more of the following:

[0505] (1) The time interval between the moment when the first cell completes downlink synchronization and the moment when the terminal meets the execution conditions corresponding to the first cell is greater than or equal to the first time threshold.

[0506] (2) The time interval between the time of receiving the activation command or selection command of at least one downlink TCI state of the first cell and the time of the terminal satisfying the execution condition corresponding to the first cell is greater than or equal to the first time threshold.

[0507] (3) The time interval between the time of receiving the activation command or selection command for at least one downlink beam of the first cell and the time of the terminal satisfying the execution conditions corresponding to the first cell is greater than or equal to the first time threshold.

[0508] (4) The time interval between the acquisition time of the TA value of the first cell and the time interval between the terminal meeting the execution conditions corresponding to the first cell is greater than or equal to the first time threshold.

[0509] (5) The time interval between the moment when the first cell completes uplink synchronization and the moment when the terminal meets the execution conditions corresponding to the first cell is greater than or equal to the first time threshold.

[0510] (6) The time interval between the time of receiving the activation command or selection command of at least one uplink TCI state of the first cell and the time of the terminal satisfying the execution condition corresponding to the first cell is greater than or equal to the first time threshold.

[0511] (7) The time interval between the time of receiving the activation command or selection command for at least one uplink beam of the first cell and the time of the terminal satisfying the execution conditions corresponding to the first cell is greater than or equal to the first time threshold.

[0512] (8) The time interval between the time when the candidate configuration corresponding to the first cell is decoded and / or the validity check is completed and the time when the terminal meets the execution conditions corresponding to the first cell is greater than or equal to the first time threshold.

[0513] The operations performed by the first cell include the terminal accessing the network via RACH-less mobility, completing downlink synchronization, at least one downlink TCI state being activated or selected, at least one downlink beam being activated or selected, TA value being acquired, completing uplink synchronization, at least one uplink TCI state being activated or selected, at least one uplink beam being activated or selected or the corresponding candidate configuration being decoded and / or validity checks being completed, etc.

[0514] In some embodiments, the interval between the moment when the first cell satisfies the first condition and the moment of the mobility triggering event is less than or equal to a second time threshold is used to determine whether the first cell satisfies the first condition. Alternatively, it can be understood that the interval between the moment when the operation performed by the first cell satisfies the first condition and the moment of the mobility triggering event is less than or equal to the second time threshold is used to determine whether the first cell satisfies the first condition.

[0515] Optionally, if the interval between the moment when the operation performed by the first cell satisfies the first condition and the moment when the mobility trigger event occurs is less than or equal to a second time threshold, it is determined whether the first cell satisfies the first condition, including one or more of the following:

[0516] (1) The time interval between the moment when the first cell completes downlink synchronization and the moment when the terminal meets the execution conditions corresponding to the first cell is less than or equal to the second time threshold.

[0517] (2) The time interval between the time of receiving the activation command or selection command for at least one downlink TCI state of the first cell and the time of the terminal satisfying the execution condition corresponding to the first cell is less than or equal to the second time threshold.

[0518] (3) The time interval between the time of receiving the activation command or selection command for at least one downlink beam of the first cell and the time of the terminal satisfying the execution conditions corresponding to the first cell is less than or equal to the second time threshold.

[0519] (4) The time interval between the acquisition time of the TA value of the first cell and the time interval between the terminal meeting the execution conditions corresponding to the first cell is less than or equal to the second time threshold.

[0520] (5) The time interval between the completion of uplink synchronization of the first cell and the fulfillment of the execution conditions corresponding to the first cell by the terminal is less than or equal to the second time threshold.

[0521] (6) The time interval between the time of receiving the activation command or selection command of at least one uplink TCI state of the first cell and the time of the terminal satisfying the execution condition corresponding to the first cell is less than or equal to the second time threshold.

[0522] (7) The time interval between the time of receiving the activation command or selection command for at least one uplink beam of the first cell and the time of the terminal satisfying the execution conditions corresponding to the first cell is less than or equal to the second time threshold.

[0523] (8) The time interval between the time when the candidate configuration corresponding to the first cell is decoded and / or the validity check is completed and the time when the terminal meets the execution conditions corresponding to the first cell is less than or equal to the second time threshold.

[0524] It should be noted that in this embodiment of the present disclosure, there may be a case where only one first cell exists. In this case, the second cell shall be determined using any of the following schemes.

[0525] In some embodiments, the first cell can be directly designated as the second cell.

[0526] In some embodiments, if the first cell does not meet the first condition, then mobility is not performed. It should be noted that in this embodiment, the first cell will be further determined subsequently, and then it will be determined whether the subsequently determined first cell meets the first condition, and then it will be determined whether the first cell should be designated as the second cell. Alternatively, after a period of time has elapsed since the first cell does not meet the first condition and mobility is not performed, the first cell will be further determined, and then it will be determined whether the subsequently determined first cell meets the first condition. This embodiment does not limit how the process of determining the first cell and then determining whether the subsequently determined first cell meets the first condition is subsequently executed.

[0527] Step S2105: The terminal performs mobility in the second cell.

[0528] In some embodiments, condition-triggered mobility includes at least one of the following:

[0529] (1) Condition switching;

[0530] (2) Conditional LTM;

[0531] (3) Condition PSCell changes;

[0532] (4) Add conditional PSCell;

[0533] (5) Condition SCell changes;

[0534] (6) Add conditional cells;

[0535] (7) Delete conditional cells;

[0536] (8) Mobility based on cell-level measurement results;

[0537] (9) Mobility based on beam-level measurement results;

[0538] (10) Mobility based on L1 measurement results;

[0539] (11) Mobility based on L3 measurement results.

[0540] In some embodiments, the names of information, etc., are not limited to the names described in the embodiments. Terms such as "information", "message", "signal", "signaling", "report", "configuration", "indication", "instruction", "command", "channel", "parameter", "domain", "field", "symbol", "symbol", "codebook", "codeword", "codepoint", "bit", "data", "program", and "chip" can be used interchangeably.

[0541] In some embodiments, “get,” “obtain,” “receive,” “transmit,” “bidirectional transmission,” and “send and / or receive” can be used interchangeably and can be interpreted as receiving from other entities, obtaining from protocols, obtaining from higher layers, obtaining through self-processing, or autonomous implementation, among other meanings.

[0542] In some embodiments, terms such as “send,” “transmit,” “report,” “distribute,” “transfer,” “bidirectional transmission,” “send and / or receive” can be used interchangeably.

[0543] In some embodiments, terms such as “moment,” “point in time,” “time,” and “time location” can be used interchangeably, as can terms such as “duration,” “segment,” “time window,” “window,” and “time.”

[0544] In some embodiments, terms such as "certain," "preset," "default," "set," "indicated," "a certain," "any," and "first" can be used interchangeably. "Certain A," "preset A," "default A," "set A," "indicated A," "a certain A," "any A," and "first A" can be interpreted as A pre-defined in a protocol or the like, or as A obtained through setting, configuration, or instruction, or as specific A, a certain A, any A, or first A, but are not limited thereto.

[0545] The signaling processing method involved in the embodiments of this disclosure may include at least one of steps S2101 to S2105. For example, step S2101 may be implemented as an independent embodiment, step S2102 may be implemented as an independent embodiment, step S2103 may be implemented as an independent embodiment, step S2104 may be implemented as an independent embodiment, step S2105 may be implemented as an independent embodiment, and at least two of steps S2101 to S2105 may be implemented as independent embodiments, but are not limited thereto.

[0546] In some embodiments, at least one of steps S2101-S2105 is optional, and one or more of these steps may be omitted or substituted in different embodiments.

[0547] In different embodiments, one or more of these steps may be omitted or substituted. In some embodiments, other alternative implementations may be described before or after the specification corresponding to FIG2.

[0548] Figure 3A is a flowchart illustrating a cell selection method according to an embodiment of the present disclosure, applied to a terminal. As shown in Figure 3A, this disclosure relates to a cell selection method, which includes:

[0549] Step S3101: The terminal determines at least one first cell that meets the mobility conditions.

[0550] The optional implementation of step S3101 can be found in the optional implementation of step S2103 in Figure 2, as well as other related parts in the embodiments involved in Figure 2, which will not be repeated here.

[0551] In step S3102, the terminal determines at least one cell in the first cell that meets the first condition as the second cell.

[0552] The optional implementation of step S3102 can be found in the optional implementation of step S2104 in Figure 2 and other related parts in the embodiments involved in Figure 2, which will not be repeated here.

[0553] In step S3103, the terminal performs mobility in the second cell.

[0554] The optional implementation of step S3103 can be found in the optional implementation of step S2105 in Figure 2, as well as other related parts in the embodiments involved in Figure 2, which will not be repeated here.

[0555] The cell selection method involved in the embodiments of this disclosure may include at least one of steps S3101 to S3103. For example, step S3101 may be implemented as an independent embodiment, step S3102 may be implemented as an independent embodiment, step S3103 may be implemented as an independent embodiment, steps S3101 and S3102 may be implemented as independent embodiments, steps S3101 and S3103 may be implemented as independent embodiments, and the steps are not limited thereto.

[0556] In some embodiments, at least one of steps S3101-S3103 is optional, and one or more of these steps may be omitted or substituted in different embodiments.

[0557] Figure 3B is a flowchart illustrating a cell selection method according to an embodiment of the present disclosure, applied to a terminal. As shown in Figure 3B, this disclosure relates to a cell selection method, which includes:

[0558] Step S3201: The terminal determines at least one first cell that meets the mobility conditions.

[0559] The optional implementation of step S3201 can be found in step S2103 of Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0560] In step S3202, the terminal determines at least one cell in the first cell that meets the first condition as the second cell.

[0561] The optional implementation of step S3202 can be found in step S2104 of Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0562] Figure 4A is a flowchart illustrating a cell selection method according to an embodiment of the present disclosure, applied to a network device. As shown in Figure 4A, this embodiment of the present disclosure relates to a cell selection method, which includes:

[0563] In step S4101, the network device sends mobility configuration and / or measurement configuration.

[0564] The optional implementation of step S4101 can be found in step S2101 of Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0565] In some embodiments, the network device sends mobility configuration and / or measurement configuration to the terminal, but is not limited thereto, and may also send mobility configuration and / or measurement configuration to other entities.

[0566] Step S4102: The network device sends the first condition.

[0567] The optional implementation of step S4102 can be found in step S2102 of Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0568] In some embodiments, the network device sends a first condition to the terminal, but is not limited thereto; it may also send the first condition to other entities.

[0569] The communication method involved in the embodiments of this disclosure may include at least one of steps S4101 to S4102. For example, step S4101 may be implemented as a separate embodiment, and step S4102 may be implemented as a separate embodiment, but are not limited thereto.

[0570] In some embodiments, steps S4101 and S4102 can be performed simultaneously.

[0571] In some embodiments, step S4101 is optional, and one or more of these steps may be omitted or substituted in different embodiments.

[0572] In some embodiments, step S4102 is optional, and one or more of these steps may be omitted or substituted in different embodiments.

[0573] Figure 4B is a flowchart illustrating a cell selection method according to an embodiment of the present disclosure, applied to a network device. As shown in Figure 4B, this embodiment of the present disclosure relates to a cell selection method, which includes:

[0574] Step S4201: The network device sends the first condition.

[0575] The optional implementation of step S4201 can be found in step S2102 of Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0576] Figure 5 is a flowchart illustrating a cell selection method according to an embodiment of the present disclosure. As shown in Figure 5, the present disclosure relates to a cell selection method, which includes:

[0577] Step S5101: The network device sends the first condition.

[0578] Step S5102: The terminal determines at least one first cell that meets the mobility conditions.

[0579] Step S5103: The terminal determines at least one cell in the first cell that meets the first condition as the second cell.

[0580] The optional implementation of step S5101 can be found in step S2102 of Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0581] The optional implementation of step S5102 can be found in step S2103 of Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0582] The optional implementation of step S5103 can be found in step S2104 of Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0583] In some embodiments, the above methods may include the methods of the embodiments described above on the communication system side, terminal side, network device side, etc., which will not be repeated here.

[0584] Figure 6 is a flowchart illustrating a cell selection method according to an embodiment of the present disclosure. As shown in Figure 6, the present disclosure relates to a cell selection method, which includes:

[0585] Step S6101: For condition-triggered mobility, if multiple candidate cells meet the mobility execution conditions, the terminal preferentially selects the candidate cell that has already obtained uplink or downlink synchronization information to execute mobility.

[0586] In some embodiments, for condition-triggered mobility, if multiple candidate cells meet the mobility execution conditions, the terminal preferentially selects a cell capable of performing RACH-less mobility to perform mobility.

[0587] Cells capable of performing RACH-less mobility include candidate cells that have completed advance uplink synchronization and / or candidate cell configurations that include TA values.

[0588] For condition-triggered mobility, if multiple candidate cells meet the mobility execution conditions, the terminal will preferentially select the cell that has already performed downlink synchronization to execute mobility.

[0589] For condition-triggered mobility, if multiple candidate cells meet the mobility execution conditions, the terminal will preferentially select the cell that has activated the corresponding UL or DL ​​TCI state to execute mobility.

[0590] 1 In some embodiments, the terminal performs condition-triggered mobility assessment based on a condition-triggered mobility configuration and / or a corresponding measurement configuration configured on the network side.

[0591] 1.1 The condition-triggered mobility configuration may include any one or more of the following: configuration identifier, candidate cell identifier (e.g., PCI), candidate configuration, execution condition configuration, early uplink synchronization configuration, reference signal configuration, TCI information, and TA information of the candidate cell.

[0592] 1.1.1 In some embodiments, the TA information of the candidate cell is included in the candidate configuration.

[0593] 1.2 In some embodiments, the condition-triggered mobility operation described in 1 includes, but is not limited to, any one or more of the following mobility operations.

[0594] 1.2.1 Conditional Toggle (CHO)

[0595] 1.2.2 Conditional LTM

[0596] 1.2.2.1 Includes one or more of the following: Conditional LTM for MCG or PCell, Conditional LTM for SCG or PSCell, and Conditional LTM for both MCG or PCell and SCG or PSCell.

[0597] 1.2.3 Conditional PSCell Change (CPC)

[0598] 1.2.4 Conditional PSCell Addition (CPAC)

[0599] 1.2.5 Changing, adding, or deleting condition cells

[0600] In some embodiments, the above-described condition-triggered mobility all support Subsequent Mobility.

[0601] 1.3 In some embodiments, the execution conditions corresponding to the condition-triggered mobility include one or more execution conditions based on measurements such as L1 measurement, LTM measurement, CSI measurement, beam measurement, L3 measurement, and RRM measurement.

[0602] 2. The terminal performs condition-triggered mobility assessment based on the network-side configured condition-triggered mobility configuration and / or corresponding measurement configuration. That is, the terminal assesses the execution conditions in the mobility configuration. When a candidate cell corresponding to the mobility meets the execution conditions, the candidate cell is referred to as the first cell (e.g., the first cell can be referred to as the triggered cell).

[0603] 2.1 In some embodiments, the candidate cell is a candidate cell of Conditional LTM.

[0604] 2.2 In some embodiments, the candidate cell may be a PCell, or an SPCell, or a pair of PCell and PSCell;

[0605] Based on step 2, select a second cell from the first cell to perform mobility (e.g., the second cell can be called the selected cell, mobility target cell, selected cell, etc.). The UE performs mobility on the second cell, applies the candidate configuration corresponding to the second cell, and performs the mobility process to access the second cell.

[0606] If the candidate cells are a PCell and PSCell pair, the first cell and the second cell described below can also be referred to as the first cell pair and the second cell pair. The evaluation criteria corresponding to the method for selecting the second cell pair from the first cell pair can be that both PCell and PSCell need to be satisfied, or PCell needs to be satisfied, or PSCell needs to be satisfied.

[0607] 4. Based on 3, in response to the existence of only one first cell (or a pair of first cells), the second cell is the first cell.

[0608] 5. Based on 3, in response to the existence of multiple first cells, select a first cell that satisfies any one or more of the following conditions as the second cell.

[0609] 5.1 Condition 0: The UE can access the first cell via RACH-less mobility.

[0610] 5.1.1 For example, the RACH-less mobility can be any one or more of the following: RACH-less HO, RACH-less LTM Cell Switch, RACH-less Conditional HO, RACH-less Conditional LTM, etc.

[0611] 5.2 Condition 1: The UE has performed downlink synchronization with the first cell.

[0612] 5.3 Condition 2: The UE has activated or selected at least one DL TCI state of the first cell.

[0613] For example, a DL TCI state can also be a joint TCI state.

[0614] 5.4 Condition 3: The UE has activated or selected at least one downlink beam of the first cell.

[0615] 5.5 Condition 4: The UE has obtained the TA value of the first cell.

[0616] 5.6 Condition 5: The UE performed uplink synchronization with the first cell.

[0617] 5.7 Condition 6: The UE has activated or selected at least one UL TCI state of the first cell.

[0618] 5.8 Condition 7: The UE has activated or selected at least one uplink beam of the first cell.

[0619] 5.9 Condition 8: The UE has performed decoding and / or validity checks on the candidate configuration corresponding to the first cell.

[0620] Based on 5, if multiple first cells satisfy the conditions in 5, the UE can determine the second cell based on any one or more of the following schemes:

[0621] 6.1 The UE selects the cell with the best cell-level measurement results as the second cell.

[0622] 6.2 The UE selects the cell with the best measurement results for the optimal beam as the second cell.

[0623] 6.3 The UE selects the cell with the best measurement results for the active or selected beam described in section 5 as the second cell.

[0624] 6.4 The UE selects a second cell from the first cells that meet the conditions in section 5 based on the implementation.

[0625] 7. Based on 5, the UE described in condition 0 can access the first cell through RACH-less mobility, which can also be understood as condition 4: the UE has obtained the TA value of the first cell. The specific method for the UE to obtain the TA value is described in 8.

[0626] 8. Based on condition 4, the UE has obtained the TA value of the first cell, which can be obtained through any one or more of the following schemes.

[0627] 8.1 The UE obtains the TA value of the first cell from the candidate configuration corresponding to the first cell.

[0628] 8.2 The UE performs TA measurement to obtain the TA value of the first cell.

[0629] 8.3 The UE obtains the TA value of the first cell by initiating an Early RACH on the first cell.

[0630] The schemes described in sections 8.2 and 8.3 can also be referred to as the UE performing advance uplink synchronization.

[0631] 9. Based on condition 5, the UE performing uplink synchronization as described in condition 5 can also be referred to as the UE acquiring the TA value of the first cell and / or the UE activating at least one uplink beam or at least one TCI state of the first cell.

[0632] 10. Based on conditions 5, 6, and 7, if the UE has activated or selected at least one UL TCI state (DL TCI state) or UL beam (DL beam) of the first cell, it can be activated or selected through any one or more of the following schemes.

[0633] 10.1 The UE activates or selects at least one UL TCI state (DL TCI state) or UL beam (DL beam) of the first cell based on network-side configuration.

[0634] 10.1.1 In addition, the UE deactivates or deletes at least one UL TCI state (DL TCI state) or UL beam (DL beam) selected in the first cell based on network-side configuration.

[0635] 10.1.2 For example, the network-side configuration can be Candidate Cell TCI States Activation or Deactivation MAC CE

[0636] 10.2 The UE activates or selects at least one UL TCI state (DL TCI state) or UL beam (DL beam) of the first cell based on the measurement results, including any one or more of the following schemes:

[0637] 10.2.1 Activate or select the TCI state or beam with the best measurement results.

[0638] 10.2.2 Activate or select the TCI state or beam whose measurement results meet the network configuration conditions. For example, if the network side configures a threshold value, the UE selects or activates the TCI state or beam whose measurement results meet the threshold value requirements.

[0639] As stated in condition 11, the UE performed downlink synchronization with the first cell, meaning the UE obtained the timing synchronization and / or frequency synchronization information of the first cell.

[0640] 11.1 For example, the UE can perform downlink synchronization via the SSB or CSI-RS of the first cell.

[0641] In condition 8 of 12, the UE has performed advance decoding and / or validity checks on the candidate configuration corresponding to the first cell, including any one or more of the following:

[0642] 12.1 The UE supports advance decoding and / or validity checks.

[0643] 12.2 The UE performed early uplink synchronization or early TA acquisition on the first cell at least within Yms before the execution conditions of the first cell were met.

[0644] 12.3 The UE performed early downlink synchronization or early TCI state activation (beam activation) on the first cell at least Yms before the execution conditions of the first cell were met.

[0645] Whether the conditions described in 13.5 are met for the first cell needs to be considered to determine whether the time interval between the time when the first cell performs the operation under the above conditions and the mobility triggering event meets the requirements.

[0646] 13.1 For example, the time interval requirement may correspond to a time threshold value, which may be specified by the protocol, configured by the network, or determined by the UE based on the implementation.

[0647] 13.2 For example, for condition 1: the UE performs downlink synchronization on the first cell, and the time interval between the UE performing downlink synchronization on the first cell and satisfying the execution condition corresponding to the first cell is no greater than Xms.

[0648] 13.3 For example, for condition 2: the UE activates or selects at least one DL TCI state of the first cell, the time interval between the UE receiving the TCI state activation command of the first cell and satisfying the execution condition corresponding to the first cell is no greater than Xms.

[0649] 13.4 For example, there are similar time requirements for conditions 3 to 7.

[0650] In the embodiments disclosed herein, some or all of the steps and their optional implementations may be arbitrarily combined with some or all of the steps in other embodiments, or may be arbitrarily combined with the optional implementations in other embodiments.

[0651] This disclosure also provides an apparatus for implementing any of the above methods. For example, an apparatus is provided that includes units or modules for implementing the steps performed by the terminal in any of the above methods. Alternatively, another apparatus is provided that includes units or modules for implementing the steps performed by a network device (e.g., an access network device, a core network functional node, a core network device, etc.) in any of the above methods.

[0652] It should be understood that the division of units or modules in the above device is only a logical functional division. In actual implementation, they can be fully or partially integrated into a single physical entity, or they can be physically separated. Furthermore, the units or modules in the device can be implemented by a processor calling software: for example, the device includes a processor connected to a memory containing instructions. The processor calls the instructions stored in the memory to implement any of the above methods or to implement the functions of the units or modules in the above device. The processor can be, for example, a general-purpose processor, such as a Central Processing Unit (CPU) or a microprocessor, and the memory can be internal or external to the device. Alternatively, the units or modules in the device can be implemented in the form of hardware circuits. The functionality of some or all of the units or modules can be achieved through the design of these hardware circuits, which can be understood as one or more processors. For example, in one implementation, the hardware circuit is an application-specific integrated circuit (ASIC). The functionality of some or all of the units or modules is achieved through the design of the logical relationships between the components within the circuit. In another implementation, the hardware circuit can be implemented using a programmable logic device (PLD), such as a field-programmable gate array (FPGA). This PLD can include a large number of logic gates, and the connection relationships between these logic gates are configured through configuration files, thereby achieving the functionality of some or all of the units or modules. All units or modules of the above device can be implemented entirely through processor-called software, entirely through hardware circuits, or partially through processor-called software with the remaining parts implemented through hardware circuits.

[0653] In this embodiment, the processor is a circuit with signal processing capabilities. In one implementation, the processor can be a circuit with instruction read and execute capabilities, such as a Central Processing Unit (CPU), a microprocessor, a graphics processing unit (GPU) (which can be understood as a microprocessor), or a digital signal processor (DSP). In another implementation, the processor can implement certain functions through the logical relationships of hardware circuits. The logical relationships of the aforementioned hardware circuits are fixed or reconfigurable. For example, the processor is a hardware circuit implemented using an application-specific integrated circuit (ASIC) or a programmable logic device (PLD), such as an FPGA. In a reconfigurable hardware circuit, the process of the processor loading a configuration document and configuring the hardware circuit can be understood as the process of the processor loading instructions to implement the functions of some or all of the above units or modules. Furthermore, 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), or a Deep Learning Processing Unit (DPU).

[0654] Figure 7A is a schematic diagram of the terminal structure proposed in an embodiment of this disclosure. As shown in Figure 7A, the terminal 7100 may include at least one of a transceiver module 7101, a processing module 7102, etc. In some embodiments, the processing module 7102 is used to determine at least one first cell that satisfies mobility conditions; and to determine the cell among the at least one first cell that satisfies a first condition as a second cell, the second cell being used for terminal access. Optionally, the transceiver module is used to perform at least one of the communication steps such as sending and / or receiving performed by the terminal 101 in any of the above methods, which will not be described in detail here. Optionally, the processing module is used to perform at least one of the other steps performed by the terminal 101 in any of the above methods, which will not be described in detail here.

[0655] Optionally, the processing module 7101 is used to perform at least one of the communication steps, such as the processing performed by the terminal in any of the above methods, which will not be described in detail here.

[0656] Figure 7B is a schematic diagram of the network device proposed in an embodiment of this disclosure. As shown in Figure 7B, the network device 7200 may include at least one of a transceiver module 7201, a processing module 7202, etc. In some embodiments, the transceiver module 7201 is used to send a first condition to a terminal, the first condition being used to determine a second cell from at least one first cell, the second cell being used for terminal access, and the first cell being a cell that satisfies mobility conditions. Optionally, the transceiver module is used to perform at least one of the communication steps such as sending and / or receiving performed by the network device 102 in any of the above methods, which will not be elaborated here.

[0657] Optionally, the processing module 7201 is used to perform at least one of the communication steps, such as the processing performed by the network device in any of the above methods, which will not be described in detail here.

[0658] In some embodiments, the transceiver module may include a transmitting module and / or a receiving module, which may be separate or integrated. Optionally, the transceiver module may be interchangeable with a transceiver.

[0659] In some embodiments, the processing module may be a single module or may include multiple sub-modules. Optionally, the multiple sub-modules may each perform all or part of the steps required by the processing module. Optionally, the processing module may be interchangeable with a processor.

[0660] Figure 8A is a schematic diagram of the structure of the communication device 8100 proposed in an embodiment of this disclosure. The communication device 8100 can be a network device (e.g., access network device, core network device, etc.), a terminal (e.g., user equipment, etc.), a chip, chip system, or processor that supports the network device in implementing any of the above methods, or a chip, chip system, or processor that supports the terminal in implementing any of the above methods. The communication device 8100 can be used to implement the methods described in the above method embodiments; for details, please refer to the descriptions in the above method embodiments.

[0661] As shown in Figure 8A, the communication device 8100 includes one or more processors 8101. The processor 8101 can be a general-purpose processor or a dedicated processor, such as a baseband processor or a central processing unit (CPU). The baseband processor can be used to process communication protocols and communication data, while the CPU can be used to control communication devices (e.g., base stations, baseband chips, terminal devices, terminal device chips, DUs or CUs, etc.), execute programs, and process program data. The communication device 8100 is used to execute any of the above methods.

[0662] 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 may also be located outside the communication device 8100.

[0663] 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 transceivers 8103 perform at least one of the communication steps such as sending and / or receiving in the above method (e.g., steps S2101, S2102, S2103, S2104, but not limited thereto).

[0664] In some embodiments, a transceiver may include a receiver and / or a transmitter, which may be separate or integrated. Optionally, the terms transceiver, transceiver unit, transceiver, transceiver circuit, etc., may be used interchangeably; the terms transmitter, transmitting unit, transmitter, transmitting circuit, etc., may be used interchangeably; and the terms receiver, receiving unit, receiver, receiving circuit, etc., may be used interchangeably.

[0665] In some embodiments, the communication device 8100 may 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 instructions stored in the memory 8102 and send the instructions to the processor 8101.

[0666] The communication device 8100 described in the above embodiments may be a network device or a terminal, but the scope of the communication device 8100 described in this disclosure is not limited thereto, and the structure of the communication device 8100 may not be limited by FIG8A. The communication device may be a standalone device or may be part of a larger device. For example, the communication device may be: (1) a standalone integrated circuit IC, or chip, or chip system or subsystem; (2) a collection of one or more ICs, optionally, the IC collection may also include storage components for storing data and programs; (3) an ASIC, such as a modem; (4) a module that can be embedded in other devices; (5) a receiver, terminal device, smart terminal device, cellular phone, wireless device, handheld device, mobile unit, vehicle device, network device, cloud device, artificial intelligence device, etc.; (6) others, etc.

[0667] Figure 8B is a schematic diagram of the structure of chip 8200 according to an embodiment of this disclosure. For cases where the communication device 8100 can be a chip or a chip system, please refer to the schematic diagram of chip 8200 shown in Figure 8B, but it is not limited thereto.

[0668] Chip 8200 includes one or more processors 8201, which are used to perform any of the above methods.

[0669] In some embodiments, chip 8200 further includes one or more interface circuits 8202. Optionally, the interface circuit 8202 is connected to memory 8203, and the interface circuit 8202 can be used to receive signals from memory 8203 or other devices, and the interface circuit 8202 can be used to send signals to memory 8203 or other devices. For example, the interface circuit 8202 can read instructions stored in memory 8203 and send the instructions to processor 8201.

[0670] In some embodiments, the interface circuit 8202 performs at least one of the communication steps such as sending and / or receiving in the above method, and the processor 8201 performs at least one of the other steps.

[0671] In some embodiments, the terms interface circuit, interface, transceiver pin, transceiver, etc., can be used interchangeably.

[0672] In some embodiments, chip 8200 further includes one or more memories 8203 for storing instructions. Optionally, all or part of the memories 8203 may be located outside of chip 8200.

[0673] This disclosure also proposes a storage medium storing instructions that, when executed on a communication device 8100, cause the communication device 8100 to perform 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 not limited thereto; it may also be a storage medium readable by other devices. Optionally, the storage medium may be a non-transitory storage medium, but not limited thereto; it may also be a temporary storage medium.

[0674] This disclosure also provides a program product that, when executed by the communication device 8100, causes the communication device 8100 to perform any of the above methods. Optionally, the program product is a computer program product.

[0675] This disclosure also proposes a computer program that, when run on a computer, causes the computer to perform any of the above methods.

Claims

1. A cell selection method, characterized by, The method is executed by a terminal, and the method includes: Identify at least one first cell that meets the mobility requirements; The cell that meets the first condition among the at least one first cell is determined as the second cell, and the second cell is used for terminal access.

2. The method of claim 1, wherein, The first condition includes one or more of the following: the first cell performs RACH-less mobility, performs synchronization, or activates the Transmission Configuration Indicator (TCI) state.

3. The method according to claim 1 or 2, characterized in that, The first condition includes one or more of the following: The terminal supports RACH-less mobility access to the first cell; The first cell has completed downlink synchronization; At least one downlink TCI state of the first cell is activated or selected; At least one downlink beam of the first cell is activated or selected; The timing advance TA value of the first cell is valid; The first cell has completed uplink synchronization; At least one uplink TCI state of the first cell is activated or selected; At least one uplink beam of the first cell is activated or selected; The candidate configuration corresponding to the first cell is decoded and / or its validity is checked.

4. The method according to any one of claims 1 to 3, characterized in that, The first cells that satisfy the first condition include multiple cells, and the step of determining the cell that satisfies the first condition among the at least one first cell as the second cell includes: The cell with the highest cell-level measurement result among the multiple first cells that meet the first condition is determined as the second cell; The cell with the highest beam measurement result among the multiple first cells that meet the first condition is determined as the second cell; The cell with the highest measurement result among the activated or selected beams of the multiple first cells that meet the first condition is determined as the second cell; The cell with the highest measurement result of the best beam among the multiple first cells that meet the first condition is determined as the second cell.

5. The method of claim 3, wherein, The TA value of the first cell is obtained using one or more of the following methods: The TA value of the first cell is obtained based on the candidate configuration corresponding to the first cell; The TA value of the first cell is obtained based on TA measurement; The TA value of the first cell is obtained by the terminal initiating an early RACH on the first cell.

6. The method of claim 3, wherein, At least one downlink TCI state or beam of the first cell is activated or selected using one or more of the following methods: At least one downlink TCI state or beam of the first cell is activated or selected based on the configuration of the network device; At least one downlink TCI state or beam of the first cell is activated or selected based on the measurement results.

7. The method of claim 3, wherein, At least one uplink TCI state or beam of the first cell is activated or selected using one or more of the following methods: At least one uplink TCI state or beam of the first cell is activated or selected based on the configuration of the network device; At least one uplink TCI state or beam of the first cell is activated or selected based on the measurement results.

8. The method of claim 3, wherein, The first cell completes uplink synchronization, including: The timing synchronization information and / or frequency synchronization information of the first cell are acquired.

9. The method of claim 3, wherein, The candidate configuration corresponding to the first cell is decoded and / or its validity is checked, including one or more of the following: The terminal supports pre-decoding and / or validity checks; Early uplink synchronization or early TA acquisition is performed within a first time period before the mobility conditions are met; Early downlink synchronization or early TCI state activation is performed within a first time period before the mobility conditions are met.

10. The method according to any one of claims 2 to 9, characterized in that, The method further includes: If the interval between the moment when the first cell meets the first condition and the moment when the mobility trigger event is greater than or equal to a first time threshold, it is determined whether the first cell meets the first condition. and / or; If the interval between the moment when the first cell meets the first condition and the moment when the mobility trigger event is less than or equal to a second time threshold, it is determined whether the first cell meets the first condition.

11. The method of claim 10, wherein, Determining whether the first cell meets the first condition when the interval between the moment when the first cell satisfies the first condition and the moment when the mobility trigger event is less than or equal to a first time threshold includes one or more of the following: The time interval between the moment when the first cell completes downlink synchronization and the moment when the terminal meets the execution conditions corresponding to the first cell is less than or equal to the second time threshold. The time interval between the time of receiving the activation command or selection command for at least one downlink TCI state of the first cell and the time of the terminal satisfying the execution condition corresponding to the first cell is less than or equal to the second time threshold. The time interval between the time of receiving the activation command or selection command for at least one downlink beam of the first cell and the time when the terminal meets the execution conditions corresponding to the first cell is less than or equal to a second time threshold. The time interval between the acquisition time of the TA value of the first cell and the time interval between the terminal meeting the execution conditions corresponding to the first cell is less than or equal to the second time threshold. The time interval between the moment when the first cell completes uplink synchronization and the moment when the terminal meets the execution conditions corresponding to the first cell is less than or equal to the second time threshold. The time interval between the time of receiving the activation command or selection command for at least one uplink TCI state of the first cell and the time of the terminal satisfying the execution condition corresponding to the first cell is less than or equal to the second time threshold. The time interval between the time of receiving the activation command or selection command for at least one uplink beam of the first cell and the time when the terminal meets the execution conditions corresponding to the first cell is less than or equal to a second time threshold. The time interval between the moment when the candidate configuration corresponding to the first cell is decoded and / or the validity check is completed and the moment when the terminal meets the execution condition corresponding to the first cell is less than or equal to the second time threshold.

12. The method according to any one of claims 1 to 11, characterized in that, The method further includes: Receive condition-triggered mobility configuration and / or measurement configuration.

13. The method of claim 12, wherein, The mobility configuration includes at least one of the following: Configuration identifier; Candidate community identifier; Candidate configurations; Execution condition configuration; Configure upstream synchronization in advance; Reference signal configuration; TCI information; TA information for candidate cells.

14. The method according to any one of claims 1 to 13, characterized in that, The mobility conditions include at least one of the following: The execution conditions for L1 measurement; Execution conditions for L1 / L2 triggered mobility LTM measurements; Execution conditions for Channel State Information (CSI) measurements; Execution conditions for beam measurement; Execution conditions for L3 measurement; Execution conditions for Radio Resource Management (RRM) measurements.

15. The method according to any one of claims 1 to 14, characterized in that, The method further includes: The first condition is received from the network device.

16. A cell selection method, characterized by, The method is performed by a network device, and the method includes... A first condition is sent to the terminal, the first condition being used to determine a second cell from at least one first cell, the second cell being used for terminal access, and the first cell being a cell that satisfies mobility conditions.

17. The method of claim 16, wherein, The first condition includes one or more of the following: the first cell performs RACH-less mobility, performs synchronization, or activates TCI state.

18. The method of claim 16 or 17, wherein, The first condition includes one or more of the following: The terminal supports RACH-less mobility access to the first cell; The first cell has completed downlink synchronization; At least one downlink TCI state of the first cell is activated or selected; At least one downlink beam of the first cell is activated or selected; The TA value of the first cell is valid; The first cell has completed uplink synchronization; At least one uplink TCI state of the first cell is activated or selected; At least one uplink beam of the first cell is activated or selected; The candidate configuration corresponding to the first cell is decoded and / or its validity is checked.

19. The method according to any one of claims 16 to 18, characterized in that, The first cell that satisfies the first condition includes multiple cells; The second cell is the cell with the highest cell-level measurement result among the multiple first cells that meet the first condition; The second cell is the cell with the highest beam measurement result among the multiple first cells that meet the first condition; The second cell is the cell with the highest measurement result among the activated or selected beams of the multiple first cells that meet the first condition; The second cell is the cell with the highest measurement result of the best beam among the multiple first cells that meet the first condition.

20. The method of claim 18, wherein, The TA value of the first cell is obtained using one or more of the following methods: The TA value of the first cell is obtained based on the candidate configuration corresponding to the first cell; The TA value of the first cell is obtained based on TA measurement; The TA value of the first cell is obtained by the terminal initiating an early RACH on the first cell.

21. The method of claim 18, wherein, At least one downlink TCI state or beam of the first cell is activated or selected using one or more of the following methods: At least one downlink TCI state or beam of the first cell is activated or selected based on the configuration of the network device; At least one downlink TCI state or beam of the first cell is activated or selected based on the measurement results.

22. The method of claim 18, wherein, At least one uplink TCI state or beam of the first cell is activated or selected using one or more of the following methods: At least one uplink TCI state or beam of the first cell is activated or selected based on the configuration of the network device; At least one uplink TCI state or beam of the first cell is activated or selected based on the measurement results.

23. The method of claim 18, wherein, The first cell completes uplink synchronization, including: The timing synchronization information and / or frequency synchronization information of the first cell are acquired.

24. The method of claim 18, wherein, The candidate configuration corresponding to the first cell is decoded and / or its validity is checked, including one or more of the following: The terminal supports pre-decoding and / or validity checks; Early uplink synchronization or early TA acquisition is performed within a first time period before the mobility conditions are met; Early downlink synchronization or early TCI state activation is performed within a first duration before the mobility conditions are met.

25. The method according to any one of claims 17 to 24, characterized in that, The method further includes: Whether the first cell meets the first condition is determined when the interval between the moment when the first cell meets the first condition and the moment when the mobility trigger event is greater than or equal to a first time threshold. and / or; Whether the first cell meets the first condition is determined when the interval between the moment when the first cell meets the first condition and the moment when the mobility trigger event is less than or equal to the second time threshold.

26. The method of claim 25, wherein, Whether the first cell meets the first condition is determined when the interval between the moment when the operation performed in the first cell meets the first condition and the moment when the mobility trigger event is less than or equal to a first time threshold, including one or more of the following: The time interval between the moment when the first cell completes downlink synchronization and the moment when the terminal meets the execution conditions corresponding to the first cell is less than or equal to the second time threshold. The time interval between the time of receiving the activation command or selection command for at least one downlink TCI state of the first cell and the time of the terminal satisfying the execution condition corresponding to the first cell is less than or equal to the second time threshold. The time interval between the time of receiving the activation command or selection command for at least one downlink beam of the first cell and the time when the terminal meets the execution conditions corresponding to the first cell is less than or equal to a second time threshold. The time interval between the acquisition time of the TA value of the first cell and the time interval between the terminal meeting the execution conditions corresponding to the first cell is less than or equal to the second time threshold. The time interval between the moment when the first cell completes uplink synchronization and the moment when the terminal meets the execution conditions corresponding to the first cell is less than or equal to the second time threshold. The time interval between the time of receiving the activation command or selection command for at least one uplink TCI state of the first cell and the time of the terminal satisfying the execution condition corresponding to the first cell is less than or equal to the second time threshold. The time interval between the time of receiving the activation command or selection command for at least one uplink beam of the first cell and the time when the terminal meets the execution conditions corresponding to the first cell is less than or equal to a second time threshold. The time interval between the moment when the candidate configuration corresponding to the first cell is decoded and / or the validity check is completed and the moment when the terminal meets the execution condition corresponding to the first cell is less than or equal to the second time threshold.

27. The method according to any one of claims 16 to 26, characterized in that, The method further includes: Send condition-triggered mobility configuration and / or measurement configuration.

28. The method of claim 27, wherein, The mobility configuration includes at least one of the following: Configuration identifier; Candidate community identifier; Candidate configurations; Execution condition configuration; Configure upstream synchronization in advance; Reference signal configuration; TCI information; TA information for candidate cells.

29. The method according to any one of claims 16 to 28, characterized in that, The mobility conditions include at least one of the following: The conditions for performing L1 measurements; Conditions for performing LTM measurements; Conditions for performing CSI measurements; Execution conditions for beam measurement; Execution conditions for L3 measurement; Conditions for performing RRM measurements.

30. A cell selection apparatus, characterized by comprising: The cell selection device includes: A processing module is used to determine at least one first cell that meets the mobility conditions; The processing module is further configured to identify a cell among the at least one first cell that meets the first condition as a second cell, and the second cell is used for terminal access.

31. A cell selection apparatus, characterized by comprising: The cell selection device includes: The transceiver module is used to send a first condition to the terminal, the first condition being used to determine a second cell from at least one first cell, the second cell being used for terminal access, and the first cell being a cell that satisfies mobility conditions.

32. A terminal, characterized by The terminal includes: One or more processors; The terminal is used to execute the cell selection method according to any one of claims 1 to 15.

33. A network device, comprising: The terminal includes: One or more processors; The terminal is used to execute the cell selection method according to any one of claims 16 to 29.

34. A communication system, characterized by The device includes a terminal and a network device, wherein the terminal is configured to implement the cell selection method according to any one of claims 1 to 15, and the network device is configured to implement the cell selection method according to any one of claims 16 to 29.

35. A storage medium, the storage medium storing instructions, wherein, When the instruction is executed on the communication device, the communication device performs the cell selection method as described in any one of claims 1 to 15, or performs the cell selection method as described in any one of claims 16 to 29.

36. A computer program product, characterised in that, When the computer program product is run on a communication device, it causes the communication device to perform the feature indication method as described in any one of claims 1 to 29.

Images