Method and apparatus for communication node used for wireless communication

Abstract

The present application discloses a method and apparatus for a communication node used for wireless communication. A communication node is configured to: receive a first RRC message, the first RRC message comprising configuration information of a first candidate cell, and the configuration information of the first candidate cell indicating a first identifier of the first candidate cell and UE-based timing advance measurement for the first candidate cell; receive first signaling, the first signaling being signaling of a protocol layer below an RRC sub-layer; and perform the UE-based timing advance measurement for the first candidate cell. The solution provided by the present application is beneficial to enhancing the UE-based timing advance measurement for LTM, is beneficial to improving the accuracy of the TA of an LTM candidate cell, and is beneficial to improving the robustness of a handover process.

Description

A method and apparatus for use in a communication node for wireless communication

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on January 19, 2024, with application number 202410084341.5, and invention name “A method and device in a communication node used for wireless communication”; claims priority to the Chinese patent application filed with the China Patent Office on February 6, 2024, with application number 202410172093.X, and invention name “A method and device in a communication node used for wireless communication”; claims priority to the Chinese patent application filed with the China Patent Office on January 29, 2024, with application number 202410117844.8, and invention name “A method and device in a communication node used for wireless communication”; all contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to a transmission method and apparatus in a wireless communication system, and more particularly to a method and apparatus for UE-based timing advance measurement (TA measurement). Background Art

[0003] With the continuous development of wireless communications, the requirements for mobility, transmission latency, and system capacity are becoming increasingly stringent. 3GPP has completed the standardization of Layer 1 (Layer 1) / Layer 2 (Layer 2) Triggered Mobility (LTM) through the "Further NR mobility enhancements" work item (WI). To further enhance mobility, conditional LTM, or inter-CU LTM, has become a key research topic in 3GPP Release 19.

[0004] To enhance the LTM process, LTM supports UE-based timing advance measurement. The UE measures the downlink receive timing difference between the serving cell and the LTM candidate cell, as well as the uplink timing advance of the serving cell, to derive the uplink timing advance of the LTM candidate cell. To improve the robustness of LTM early synchronization, the triggering mechanism for UE-based timing advance measurement in LTM needs to be refined. Furthermore, given that UE-based timing advance measurement can significantly reduce signaling overhead during handovers, applying early uplink synchronization to conditional LTM, inter-CU LTM, CHO, or CPC offers promising prospects for standardization. Summary of the Invention

[0005] Through research, the inventors discovered that the activation and triggering mechanisms for UE-based timing advance measurements in the existing LTM early synchronization process are incomplete. Inappropriate UE-based timing advance measurements can affect normal downlink communications in the serving cell, invalidate the candidate cell TA, and reduce the robustness of the LTM process. Therefore, it is necessary to enhance the UE-based timing advance measurement process.

[0006] To address the above-mentioned issues, this application provides a solution. While the NR system is used as an example in the description of the above-mentioned issues, this application is also applicable to scenarios such as LTE (Long-Term Evolution), LTE-A (Long-Term Evolution Advanced), or future 6G systems, achieving technical effects similar to those of the NR system. Furthermore, while this application provides specific implementations for the 3GPP system, it can also be used in non-3GPP system scenarios, achieving technical effects similar to those of the 3GPP system. Furthermore, adopting a unified design for different scenarios can also help reduce hardware complexity and cost. Furthermore, while this application is initially intended for the Uu air interface, it can also be used for the PC5 interface, achieving technical effects similar to those of the Uu air interface. Furthermore, while this application is initially intended for LTM, it can also be used for conditional LTM, continuous LTM, SCPAC, CHO, CPC, etc., achieving technical effects similar to those of LTM. Furthermore, although the original intention of this application is for the terminal and base station scenario, this application is also applicable to the V2X (Vehicle-to-Everything, Internet of Vehicles) scenario, the communication scenario between the terminal and the relay, and the relay and the base station, to achieve similar technical effects in the terminal and base station scenario. Furthermore, although the original intention of this application is for the terminal and base station scenario, this application is also applicable to the IAB (Integrated Access and Backhaul, integrated access and backhaul) communication scenario, to achieve similar technical effects in the terminal and base station scenario. Furthermore, although the original intention of this application is for the terrestrial network (TN) scenario, this application is also applicable to the non-terrestrial network (NTN) communication scenario, to achieve similar technical effects in the TN scenario. In addition, the use of a unified solution for different scenarios can also help reduce hardware complexity and cost.

[0007] As an embodiment, the interpretation of terminology in this application refers to the definition of 3GPP specification protocol TS36 series.

[0008] As an embodiment, the interpretation of the terms in this application refers to the definition of the 3GPP specification protocol TS38 series.

[0009] As an embodiment, the interpretation of the terms in this application refers to the definitions of the 3GPP specification protocol TS37 series.

[0010] It should be noted that, in the absence of conflict, the embodiments and features in any node of the present application can be applied to any other node. In the absence of conflict, the embodiments and features in the embodiments of the present application can be arbitrarily combined with each other.

[0011] The present application discloses a method in a first node used for wireless communication, characterized by comprising:

[0012] receiving a first RRC message, the first RRC message including configuration information of a first candidate cell, the configuration information of the first candidate cell indicating a first identifier of the first candidate cell and a UE-based timing advance measurement for the first candidate cell; receiving first signaling, the first signaling being signaling of a protocol layer below the RRC sublayer; and performing the UE-based timing advance measurement for the first candidate cell;

[0013] Among them, the execution of the UE-based timing advance measurement for the first candidate cell depends on at least the former of the first field and the first timer of the first signaling, and the first timer indicates whether the uplink is synchronized; the first signaling includes DCI or the timing advance for the first serving cell or at least one of the first identifier; the first field of the first signaling depends on the configuration information of the first candidate cell.

[0014] As an embodiment, the problem to be solved by the present application includes: how to enhance the UE-based timing advance measurement process to improve the robustness of LTM early synchronization.

[0015] As an embodiment, the problem to be solved by this application includes: how to design an activation and deactivation mechanism based on UE timing advance measurement.

[0016] As an embodiment, the problem to be solved by this application includes: how to design a triggering mechanism based on UE timing advance measurement.

[0017] As an embodiment, the problem to be solved by the present application includes: how to design a UE-based timing advance measurement mechanism to make it applicable to conditional mobility; the conditional mobility includes conditional LTM or CHO or CPC.

[0018] As an embodiment, the problem to be solved by the present application includes: how to design a UE-based timing advance measurement mechanism to make it applicable to continuous handover; the continuous handover includes continuous conditional LTM or SCPAC.

[0019] As an embodiment, the problem to be solved by the present application includes: how to design a TA maintenance mechanism based on UE timing advance measurement to improve the effectiveness and accuracy of candidate cell TA.

[0020] As an embodiment, the characteristics of the above method include: the first signaling is signaling of the protocol layer below the RRC sublayer.

[0021] As an embodiment, the characteristics of the above method include: the execution of the UE-based timing advance measurement for the first candidate cell relies on at least the first field and the first timer of the first signaling.

[0022] As an embodiment, the benefits of the above method include: facilitating activation or triggering of UE-based timing advance measurement.

[0023] As an embodiment, the above method has the following benefits: it helps the UE maintain the validity of the candidate cell TA obtained based on the UE's timing advance measurement.

[0024] As an embodiment, the above method has the following benefits: it helps the UE maintain the validity of the downlink reception timing difference between the serving cell and the candidate cell obtained based on the UE's timing advance measurement, thereby improving the robustness of the handover process.

[0025] As an embodiment, the above method has the following benefits: it is helpful to improve the accuracy and effectiveness of the candidate cell TA.

[0026] As an embodiment, the benefits of the above method include: it is helpful to reduce signaling interaction.

[0027] As an embodiment, the benefits of the above method include: using low-layer signaling to trigger UE-based timing advance measurement, reducing the delay of the triggering process, and improving the flexibility of the UE-based timing advance measurement process.

[0028] According to one aspect of the present application, it is characterized in that the execution of the UE-based timing advance measurement for the first candidate cell depends on the first timer being running; the first timer controls whether the uplink of the first serving cell is synchronized.

[0029] As an embodiment, the above method has the following benefits: it is helpful to determine the validity of the TA of the candidate cell obtained based on the timing advance measurement of the UE.

[0030] As an embodiment, the above method has the following benefits: it is helpful to improve the accuracy of the TA of the candidate cell.

[0031] As an embodiment, the benefits of the above method include: being conducive to improving the robustness of the switching process.

[0032] According to one aspect of the present application, it is characterized in that the execution of the UE-based timing advance measurement for the first candidate cell depends on a second timer not being running; the second timer controls whether the uplink of the first candidate cell is synchronized.

[0033] As an embodiment, the above method has the following benefits: it is helpful to maintain the TA of the candidate cell obtained based on the timing advance measurement of the UE.

[0034] As an embodiment, the above method has the following benefits: it is helpful to reduce the impact of frequent measurements on downlink reception of the serving cell.

[0035] According to one aspect of the present application, it is characterized in that the execution of the UE-based timing advance measurement for the first candidate cell depends on the first timer not being running; the first timer controls whether the uplink of the first candidate cell is synchronized.

[0036] As an embodiment, the benefits of the above method include: it is helpful to reduce changes to existing protocols and is simple to implement.

[0037] According to one aspect of the present application, it is characterized in that the execution of the UE-based timing advance measurement for the first candidate cell depends on the UE-based timing advance measurement for the first candidate cell being activated; and the first signaling includes the timing advance for the first serving cell.

[0038] As an embodiment, the benefits of the above method include: by activating the configuration in advance, the load in the first signaling is reduced, and the triggering of the UE-based timing advance measurement is made more flexible.

[0039] As an embodiment, the benefits of the above method include: being conducive to reducing signaling interaction overhead.

[0040] According to one aspect of the present application, it is characterized in that the first signaling indicates a first time interval, and the UE-based timing advance measurement of the first candidate cell depends on the first time interval.

[0041] As an embodiment, the benefits of the above method include: eliminating the influence of the downlink transmission timing difference between the candidate cell and the serving cell on the UE-based timing advance measurement through signaling, thereby improving the accuracy of the candidate cell TA.

[0042] As an embodiment, the benefits of the above method include: expanding the application scenario of UE-based timing advance measurement to make it applicable to LTM handover between asynchronous cells.

[0043] As an embodiment, the benefits of the above method include: facilitating the early synchronization process of inter-CU LTM to adopt UE-based timing advance measurement.

[0044] According to one aspect of the present application, it is characterized in that the first field of the first signaling indicates the execution of the UE-based timing advance measurement for the first candidate cell; the first signaling includes the first identifier; the format of the first signaling is DCI format 1_0; the first signaling includes a Frequency domain resource assignment field, and the Frequency domain resource assignment field is set to all 1s.

[0045] As an embodiment, the above method has the following benefits: it is facilitating the use of existing DCI formats to trigger UE-based timing advance measurement.

[0046] As an embodiment, the above method has the following benefits: it is advantageous to utilize the existing PDCCH Order to trigger UE-based timing advance measurement.

[0047] As an embodiment, the advantages of the above method include: reducing changes to the protocol and being easy to implement.

[0048] The present application discloses a method used in a second node of wireless communication, characterized by comprising:

[0049] sending a first RRC message, where the first RRC message includes configuration information of a first candidate cell, where the configuration information of the first candidate cell indicates a first identifier of the first candidate cell and a UE-based timing advance measurement for the first candidate cell; sending first signaling, where the first signaling is signaling of a protocol layer below the RRC sublayer; and a receiver of the first RRC message performs the UE-based timing advance measurement for the first candidate cell;

[0050] Among them, the execution of the UE-based timing advance measurement for the first candidate cell depends on at least the former of the first field and the first timer of the first signaling, and the first timer indicates whether the uplink is synchronized; the first signaling includes DCI or the timing advance for the first serving cell or at least one of the first identifier; the first field of the first signaling depends on the configuration information of the first candidate cell.

[0051] According to one aspect of the present application, it is characterized in that the execution of the UE-based timing advance measurement for the first candidate cell depends on the first timer being running; the first timer controls whether the uplink of the first serving cell is synchronized

[0052] According to one aspect of the present application, it is characterized in that the execution of the UE-based timing advance measurement for the first candidate cell depends on a second timer not being running; the second timer controls whether the uplink of the first candidate cell is synchronized.

[0053] According to one aspect of the present application, it is characterized in that the execution of the UE-based timing advance measurement for the first candidate cell depends on the first timer not being running; the first timer controls whether the uplink of the first candidate cell is synchronized.

[0054] According to one aspect of the present application, it is characterized in that the execution of the UE-based timing advance measurement for the first candidate cell depends on the UE-based timing advance measurement for the first candidate cell being activated; and the first signaling includes the timing advance for the first serving cell.

[0055] According to one aspect of the present application, it is characterized in that the first signaling indicates a first time interval, and the UE-based timing advance measurement of the first candidate cell depends on the first time interval.

[0056] According to one aspect of the present application, it is characterized in that the first field of the first signaling indicates the execution of the UE-based timing advance measurement for the first candidate cell; the first signaling includes the first identifier; the format of the first signaling is DCI format 1_0; the first signaling includes a Frequency domain resource assignment field, and the Frequency domain resource assignment field is set to all 1s.

[0057] The present application discloses a first node used for wireless communication, characterized by comprising:

[0058] A first processor is configured to receive a first RRC message, the first RRC message including configuration information of a first candidate cell, the configuration information of the first candidate cell indicating a first identifier of the first candidate cell and a UE-based timing advance measurement for the first candidate cell; receive first signaling, the first signaling being signaling of a protocol layer below the RRC sublayer; and perform the UE-based timing advance measurement for the first candidate cell.

[0059] Among them, the execution of the UE-based timing advance measurement for the first candidate cell depends on at least the former of the first field and the first timer of the first signaling, and the first timer indicates whether the uplink is synchronized; the first signaling includes DCI or the timing advance for the first serving cell or at least one of the first identifier; the first field of the first signaling depends on the configuration information of the first candidate cell.

[0060] The present application discloses a second node used for wireless communication, characterized by comprising:

[0061] The second processor sends a first RRC message, where the first RRC message includes configuration information of a first candidate cell, where the configuration information of the first candidate cell indicates a first identifier of the first candidate cell and a UE-based timing advance measurement for the first candidate cell; and sends first signaling, where the first signaling is signaling of a protocol layer below the RRC sublayer; and a receiver of the first RRC message performs the UE-based timing advance measurement for the first candidate cell.

[0062] Among them, the execution of the UE-based timing advance measurement for the first candidate cell depends on at least the former of the first field and the first timer of the first signaling, and the first timer indicates whether the uplink is synchronized; the first signaling includes DCI or the timing advance for the first serving cell or at least one of the first identifier; the first field of the first signaling depends on the configuration information of the first candidate cell.

[0063] As an example, compared with traditional solutions, this application has the following advantages:

[0064] -. Facilitates the activation or triggering of UE-based timing advance measurements;

[0065] - Use low-layer signaling to trigger UE-based timing advance measurement, reducing the delay of the triggering process and improving the flexibility of the UE-based timing advance measurement process;

[0066] -. It helps the UE maintain the validity of the candidate cell TA obtained based on the UE's timing advance measurement;

[0067] This helps expand the application scenarios of UE-based timing advance measurement, making it applicable to LTM handover between asynchronous cells.

[0068] - is conducive to reducing the load in the first signaling by activating the configuration in advance, making the triggering of the UE-based timing advance measurement more flexible;

[0069] -. It is conducive to the use of existing DCI formats to trigger UE-based timing advance measurements;

[0070] -. It helps reduce the impact of frequent measurements on downlink reception in the serving cell;

[0071] -. It helps to reduce changes to existing protocols and is simple to implement;

[0072] -. It is helpful to improve the accuracy of TA of candidate cells;

[0073] -.It is beneficial to improve the robustness of the switching process;

[0074] -. It helps to reduce signaling interaction. BRIEF DESCRIPTION OF THE DRAWINGS

[0075] Other features, objects and advantages of the present application will become more apparent upon reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0076] FIG1 shows a flowchart of a UE-based timing advance measurement trigger according to an embodiment of the present application;

[0077] FIG2 shows a schematic diagram of a network architecture according to an embodiment of the present application;

[0078] FIG3 is a schematic diagram showing an embodiment of a radio protocol architecture of a user plane and a control plane according to an embodiment of the present application;

[0079] FIG4 shows a schematic diagram of a first communication device and a second communication device according to an embodiment of the present application;

[0080] FIG5 shows a wireless signal transmission flow chart according to an embodiment of the present application;

[0081] FIG6 is a schematic diagram showing that performing UE-based timing advance measurement for a first candidate cell depends on a first timer being running according to an embodiment of the present application;

[0082] FIG7 is a schematic diagram showing that performing UE-based timing advance measurement for a first candidate cell depends on a second timer not being running according to an embodiment of the present application;

[0083] FIG8 is a schematic diagram showing that performing UE-based timing advance measurement for a first candidate cell depends on a first timer not being running according to an embodiment of the present application;

[0084] FIG9 is a schematic diagram showing that performing UE-based timing advance measurement for a first candidate cell depends on activation of UE-based timing advance measurement for the first candidate cell according to an embodiment of the present application;

[0085] FIG10 is a schematic diagram showing a first signaling indicating a first time interval according to an embodiment of the present application;

[0086] FIG11 is a schematic diagram showing a format of a first signaling according to an embodiment of the present application;

[0087] FIG12 shows a structural block diagram of a processing device used in a first node according to an embodiment of the present application;

[0088] FIG13 shows a structural block diagram of a processing device used in a second node according to an embodiment of the present application.

[0089] FIG14 shows a schematic diagram of a first signaling format according to an embodiment of the present application. DETAILED DESCRIPTION

[0090] The technical solution of the present application will be further described in detail below in conjunction with the accompanying drawings. It should be noted that, unless there is a conflict, the embodiments in the present application and the features in the embodiments can be combined with each other arbitrarily.

[0091] Example 1

[0092] Embodiment 1 illustrates a flowchart of UE-based timing advance measurement triggering according to an embodiment of the present application, as shown in FIG1. ​​In FIG1, each box represents a step, and it is particularly important to emphasize that the order of the boxes in the figure does not represent the temporal sequence between the steps represented.

[0093] In embodiment 1, the first node in the present application receives a first RRC message in step 101, where the first RRC message includes configuration information of a first candidate cell, where the configuration information of the first candidate cell indicates a first identifier of the first candidate cell and a UE-based timing advance measurement for the first candidate cell; receives first signaling in step 102, where the first signaling is signaling of a protocol layer below the RRC sublayer; and performs the UE-based timing advance measurement for the first candidate cell in step 103.

[0094] Among them, the execution of the UE-based timing advance measurement for the first candidate cell depends on at least the former of the first field and the first timer of the first signaling, and the first timer indicates whether the uplink is synchronized; the first signaling includes DCI or the timing advance for the first serving cell or at least one of the first identifier; the first field of the first signaling depends on the configuration information of the first candidate cell.

[0095] As an embodiment, the first RRC message is an RRCReconfiguration message.

[0096] As an embodiment, the first RRC message configures the LTM candidate cell configuration of the first serving cell.

[0097] As an embodiment, the first candidate cell refers to an LTM candidate cell.

[0098] As an embodiment, the LTM-Candidate field in the first RRC message carries the configuration information of the first candidate cell.

[0099] As an embodiment, the configuration information of the first candidate cell configures the first identifier of the first candidate cell.

[0100] As an embodiment, the configuration information of the first candidate cell configures UE-based timing advance measurement for the first candidate cell.

[0101] As an embodiment, the first identifier is a ltm-UE-MeasuredTA-ID.

[0102] As an embodiment, the first identifier is a ltm-UE-MeasuredTA-ID-r18.

[0103] As an embodiment, the first identifier is a ltm-ServingCellUE-MeasuredTA-ID.

[0104] As an embodiment, the first identifier is an LTM-CandidateId.

[0105] As an embodiment, the first identifier is an LTM-CandidateId-r18.

[0106] As an embodiment, the first identifier is an integer.

[0107] As an embodiment, the first identifier is a non-negative integer.

[0108] As an embodiment, the first identifier indicates the first candidate cell.

[0109] As an embodiment, the first identifier indicates the first candidate cell from all LTM candidate cells of the first node.

[0110] As an embodiment, the first identifier indicates the first candidate cell from all LTM candidate cells of the first node and the first serving cell.

[0111] As an embodiment, the UE-based timing advance measurement refers to: UE-based uplink timing advance measurement for early uplink synchronization to a candidate cell for LTM.

[0112] As an embodiment, the LTM is a conditional LTM.

[0113] As an embodiment, the LTM is a continuous LTM.

[0114] As an embodiment, the LTM is a continuous conditional LTM.

[0115] As an embodiment, the LTM is Conditional L1 / L2 Triggered Mobility.

[0116] As an embodiment, the LTM is a Cond-LTM.

[0117] As an embodiment, the LTM is a CondLTM.

[0118] As an embodiment, the LTM is a C-LTM.

[0119] As an embodiment, the LTM is a CLTM.

[0120] As an embodiment, the LTM is Subsequent L1 / L2 Triggered Mobility.

[0121] As an embodiment, the LTM is a Subsequent-LTM.

[0122] As an embodiment, the LTM is an S-LTM.

[0123] As an embodiment, the LTM is a SLTM.

[0124] As an embodiment, the LTM is Subsequent Conditional L1 / L2 Triggered Mobility.

[0125] As an embodiment, the LTM is a Subsequent-Cond-LTM.

[0126] As an embodiment, the LTM is a Subsequent-C-LTM.

[0127] As an embodiment, the LTM is a SC-LTM.

[0128] As an embodiment, the LTM is a SCLTM.

[0129] As an embodiment, the UE-based timing advance measurement refers to: measuring the timing advance by the UE.

[0130] As an embodiment, the UE-based timing advance measurement refers to: determining the timing advance based on UE measurement.

[0131] As an embodiment, the UE-based timing advance measurement includes: a process in which the UE derives a timing advance to be applied to the first uplink transmission to the first candidate cell.

[0132] As an embodiment, the UE-based timing advance measurement includes: the UE performs a first measurement process.

[0133] As an embodiment, the first measurement process is L3 measurement.

[0134] As an embodiment, the first measurement process is L1 measurement.

[0135] As an embodiment, the first measurement process includes L3 measurement.

[0136] As an embodiment, the first measurement process includes L1 measurement.

[0137] As an embodiment, the first measurement process is RSTD measurement.

[0138] As an embodiment, the first measurement process is based on SSB measurement.

[0139] As an embodiment, the first measurement process is based on PRS measurement.

[0140] As an embodiment, the first measurement process refers to: measuring the downlink reception timing difference between the first serving cell and the first candidate cell.

[0141] As an embodiment, the UE-based timing advance measurement includes: the UE performs a first derivation process.

[0142] As an embodiment, the first derivation process refers to: a process of deriving the uplink timing advance of the first candidate cell based on the downlink reception timing difference between the first serving cell and the first candidate cell and the effective uplink timing of the first candidate cell, as well as the downlink transmission timing difference between the first serving cell and the first candidate cell.

[0143] As an embodiment, the UE-based timing advance measurement includes: performing the first derivation process.

[0144] As a sub-embodiment of the above embodiment, the first derivation process is: uplink timing of the first candidate cell = uplink timing of the first serving cell + 2×downlink receiving timing difference.

[0145] As a sub-embodiment of the above embodiment, the first derivation process is: uplink timing of the first candidate cell = uplink timing of the first serving cell - 2×downlink receiving timing difference.

[0146] As a sub-embodiment of the above embodiment, the first derivation process is: uplink timing of the first candidate cell = uplink timing of the first serving cell + 2×(downlink receiving timing difference - downlink sending timing difference).

[0147] As a sub-embodiment of the above embodiment, the first derivation process is: uplink timing of the first candidate cell = uplink timing of the first serving cell - 2×(downlink receive timing difference - downlink transmit timing difference).

[0148] As a sub-embodiment of the above embodiment, the first derivation process is: uplink timing of the first candidate cell = uplink timing of the first serving cell + 2×(downlink receiving timing difference + downlink sending timing difference).

[0149] As a sub-embodiment of the above embodiment, the first derivation process is: uplink timing of the first candidate cell = uplink timing of the first serving cell - 2×(downlink receiving timing difference + downlink sending timing difference).

[0150] As a sub-embodiment of the above embodiment, the first time interval is a downlink receiving and sending timing difference.

[0151] As a sub-embodiment of the above embodiment, the downlink reception timing difference refers to: a downlink reception timing difference between the first candidate cell and the first serving cell.

[0152] As a sub-embodiment of the above embodiment, the downlink transmit and receive timing difference refers to: a downlink transmit timing difference between the first candidate cell and the first serving cell.

[0153] As a sub-embodiment of the above embodiment, the downlink reception timing difference refers to: a downlink reception timing difference between the first serving cell and the first candidate cell.

[0154] As a sub-embodiment of the above embodiment, the downlink receiving and sending timing difference refers to: a downlink sending timing difference between the first serving cell and the first candidate cell.

[0155] As an embodiment, the UE-based timing advance measurement is implemented based on the UE.

[0156] As an embodiment, the UE-based timing advance measurement is based on a 3GPP protocol.

[0157] As an embodiment, the UE-based timing advance measurement is partially based on UE implementation and partially based on 3GPP protocol.

[0158] As an embodiment, the first measurement process is implemented based on UE.

[0159] As an embodiment, the first derivation process is based on the 3GPP protocol.

[0160] As an embodiment, the first measurement process is based on the 3GPP protocol.

[0161] As an embodiment, the first derivation process is implemented based on UE.

[0162] As an embodiment, the first signaling is a DCI.

[0163] As an embodiment, the first signaling is a format 1_0DCI.

[0164] As an embodiment, the first signaling is a MAC CE.

[0165] As an embodiment, the one MAC CE is an LTM cell switching command MAC CE.

[0166] As an embodiment, the one MAC CE is an LTM Cell Switch Command MAC CE.

[0167] As an embodiment, the MAC CE is a candidate cell TCI status activation / deactivation MAC CE.

[0168] As an embodiment, the MAC CE is a Candidate Cell TCI States Activation / Deactivation MAC CE.

[0169] As an embodiment, the first signaling includes a timing advance command.

[0170] As a sub-embodiment of the above embodiment, the timing advance command is a Timing Advance Command field.

[0171] As a sub-embodiment of the above embodiment, the one timing advance command is the timing advance for the first serving cell.

[0172] As a subsidiary embodiment of the above sub-embodiment, the first signaling is a Timing Advance Command MAC CE.

[0173] As a subsidiary embodiment of the above sub-embodiment, the first signaling is an Absolute Timing Advance Command MAC CE.

[0174] As a subsidiary embodiment of the above sub-embodiment, the first signaling is a Random Access Response.

[0175] As a subsidiary embodiment of the above sub-embodiment, the first signaling is a MAC RAR.

[0176] As a subsidiary embodiment of the above sub-embodiment, the first signaling is a fallbackRAR.

[0177] As a sub-embodiment of the above embodiment, the one timing advance command is a timing advance for the first candidate cell.

[0178] As a sub-embodiment of the above embodiment, the first signaling is an LTM Cell Switch Command MAC CE.

[0179] As a sub-embodiment of the above embodiment, the first signaling includes the timing advance command and the first identifier.

[0180] As an embodiment, the first field of the first signaling indicates performing the UE-based timing advance measurement for the first candidate cell.

[0181] As an embodiment, the first field of the first signaling explicitly indicates to perform the UE-based timing advance measurement for the first candidate cell.

[0182] As an embodiment, the first field of the first signaling implicitly indicates to perform the UE-based timing advance measurement for the first candidate cell.

[0183] As an embodiment, when the first field of the first signaling includes the timing advance for the first serving cell, the UE-based timing advance measurement for the first candidate cell is performed.

[0184] As an embodiment, the first signaling includes one bit, and the one bit is set to 1; the one bit is set to 1 to indicate execution or activation of the UE-based timing advance measurement for the first candidate cell.

[0185] As an embodiment, if the one bit is set to 0, it indicates that the UE-based timing advance measurement for the first candidate cell is not performed or is deactivated.

[0186] As an embodiment, the first signaling includes a timing advance command; the first field of the first signaling indicates whether the timing advance command in the first signaling is a timing advance command for the first serving cell or the first candidate cell.

[0187] As a sub-embodiment of the above embodiment, when the first field in the first signaling indicates that the one timing advance command in the first signaling is a timing advance command for the first serving cell, the UE-based timing advance measurement for the first candidate cell is triggered.

[0188] As a sub-embodiment of the above embodiment, when the first field in the first signaling indicates that the one timing advance command in the first signaling is a timing advance command for the first serving cell, the UE-based timing advance measurement for the first candidate cell is activated.

[0189] As a sub-embodiment of the above embodiment, when the first field in the first signaling indicates that the one timing advance command in the first signaling is a timing advance command for the first candidate cell, the UE-based timing advance measurement for the first candidate cell is terminated.

[0190] As a sub-embodiment of the above embodiment, when the first field in the first signaling indicates that the one timing advance command in the first signaling is a timing advance command for the first candidate cell, the UE-based timing advance measurement for the first candidate cell is deactivated.

[0191] As an embodiment, the first field of the first signaling indicates that the first signaling includes the timing advance for the first serving cell; the first signaling includes the timing advance indication for the first serving cell to perform the UE-based timing advance measurement for the first candidate cell.

[0192] As an embodiment, the first field of the first signaling indicates that the first signaling includes the timing advance for the first serving cell; the first signaling includes the timing advance indication for the first serving cell to activate the UE-based timing advance measurement for the first candidate cell.

[0193] As an embodiment, if the first field of the first signaling indicates that the first signaling includes the timing advance for the first candidate cell, stop the UE-based timing advance measurement for the first candidate cell; the first signaling includes the timing advance for the first candidate cell indicating to stop the UE-based timing advance measurement for the first candidate cell.

[0194] As an embodiment, if the first field of the first signaling indicates that the first signaling includes the timing advance for the first candidate cell, the UE-based timing advance measurement for the first candidate cell is deactivated; the first signaling includes the timing advance indication for the first candidate cell to deactivate the UE-based timing advance measurement for the first candidate cell.

[0195] As an embodiment, the first field is 1 bit.

[0196] As a sub-embodiment of the above embodiment, when the value of the first domain is 1, the first signaling includes the timing advance for the first serving cell; when the value of the first domain is 0, the first signaling does not include the timing advance for the first serving cell.

[0197] As a sub-embodiment of the above embodiment, when the value of the first field is 0, the first signaling includes the timing advance for the first candidate cell; when the value of the first field is 1, the first signaling does not include the timing advance for the first candidate cell.

[0198] As a sub-embodiment of the above embodiment, when the value of the first domain is 0, the first signaling includes the timing advance for the first serving cell; when the value of the first domain is 1, the first signaling does not include the timing advance for the first serving cell.

[0199] As a sub-embodiment of the above embodiment, when the value of the first domain is 1, the first signaling includes the timing advance for the first candidate cell; when the value of the first domain is 0, the first signaling does not include the timing advance for the first serving cell.

[0200] As an embodiment, the first field is multiple bits; when the value of the first field is a first value, the first signaling includes a timing advance for the first service cell; when the value of the first field is a second value, the first signaling does not include a timing advance for the first service cell; the first value and the second value are different.

[0201] As an embodiment, the first field is 2 bits.

[0202] As a sub-embodiment of the above embodiment, the first field indicates at least a first state, a second state, and a third state.

[0203] As a sub-embodiment of the above embodiment, the first field indicates a first state, a second state, a third state, and a fourth state.

[0204] As a sub-embodiment of the above embodiment, when the first domain indicates the first state, the first signaling includes the timing advance for the first candidate cell.

[0205] As a subsidiary embodiment of the above sub-embodiment, the timing advance of the first candidate cell is 12 bits.

[0206] As a sub-embodiment of the above embodiment, when the first domain indicates the second state, the first signaling includes the timing advance for the first serving cell.

[0207] As a subsidiary embodiment of the above sub-embodiment, the timing advance of the first serving cell is 8 bits.

[0208] As a subsidiary embodiment of the above sub-embodiment, the timing advance of the first serving cell is 6 bits.

[0209] As a subsidiary embodiment of the above sub-embodiment, the timing advance of the first serving cell is 8 bits; wherein the first 2 bits indicate the TAG-ID of the timing advance of the first serving cell carried by the first signaling.

[0210] As a subsidiary embodiment of the above sub-embodiment, the timing advance of the first serving cell is 12 bits.

[0211] As a sub-embodiment of the above embodiment, when the first domain indicates the third state, the first signaling does not include the timing advance for the first candidate cell.

[0212] As a sub-embodiment of the above embodiment, when the first domain indicates the third state, the first signaling does not include the timing advance for the first serving cell.

[0213] As a sub-embodiment of the above embodiment, when the first domain indicates the third state, the first signaling does not include the timing advance for the first candidate cell and the first signaling does not include the timing advance for the first serving cell.

[0214] As a sub-embodiment of the above embodiment, when the first field indicates the fourth state, it indicates that the timing advance field in the first signaling is retained.

[0215] As a sub-embodiment of the above embodiment, when the first domain indicates the fourth state, the first signaling includes the timing advance for the first candidate cell and the first signaling includes the timing advance for the first serving cell.

[0216] As a sub-embodiment of the above embodiment, among the two bits of the first field, one bit indicates whether the first signaling includes the timing advance of the first candidate cell; the other bit indicates whether the first signaling includes the timing advance of the first serving cell.

[0217] As a sub-embodiment of the above embodiment, when the first serving cell is the PCell of the first node and the first node is configured with two PTAGs (primary TAGs), the first state and the second state in the first domain respectively indicate the timing advances corresponding to the two PTAGs.

[0218] As a sub-embodiment of the above embodiment, when the first serving cell is the PCell of the first node and the first node is configured with a PTAG (primary TAG), the first state in the first domain indicates the timing advance corresponding to the PTAG, and the second state in the first domain indicates that the timing advance domain in the first signaling is retained.

[0219] As a sub-embodiment of the above embodiment, when the two bits in the first domain are 00, the first domain indicates the first state; when the two bits in the first domain are 01, the first domain indicates the second state; when the two bits in the first domain are 10, the first domain indicates the third state; when the two bits in the first domain are 11, the first domain indicates the fourth state.

[0220] As a sub-embodiment of the above embodiment, when the two bits in the first domain indicate different states: the first state is one of 00, 01, 10 and 11, the second state is one of 00, 01, 10 and 11, the third state is one of 00, 01, 10 and 11, and the fourth state is one of 00, 01, 10 and 11; the values ​​of the two bits in the first domain corresponding to any two states of the first state, the second state, the third state and the fourth state are different.

[0221] As an embodiment, the configuration information of the first candidate cell configured by the first RRC message indicates the TAG ID of the first serving cell used for the UE-based timing advance.

[0222] As a sub-embodiment of the above embodiment, the configuration information of the first candidate cell includes a TAG-ID field, and the TAG of the first serving cell corresponding to the TAG-ID field is used for the UE-based timing advance measurement of the first candidate cell.

[0223] As a sub-embodiment of the above embodiment, when the TAG-ID field does not exist in the configuration information of the first candidate cell, the PTAG of the first serving cell is used for the UE-based timing advance measurement for the first candidate cell.

[0224] As an embodiment, the first field is 12 bits.

[0225] As an embodiment, when the value of the first domain is less than or equal to 3846, the first signaling includes a timing advance for the first candidate cell.

[0226] As a sub-embodiment of the above embodiment, the timing advance for the first candidate cell included in the first signaling is the timing advance indicated by the Timing Advance Command field consisting of 12 bits of the first field.

[0227] As a sub-embodiment of the above embodiment, the value range of the index value of the timing advance for the first candidate cell contained in the first signaling is (0, 1, 2…3846).

[0228] As an embodiment, when the value in the first domain is greater than 3846, the first signaling includes a timing advance for the first serving cell.

[0229] As a sub-embodiment of the above embodiment, the first signaling includes a timing advance adjustment value of the first serving cell PTAG indicated by a 6-bit Timing Advance Command field for the timing advance of the first serving cell.

[0230] As a sub-embodiment of the above embodiment, the timing advance for the first serving cell included in the first signaling is a timing advance adjustment amount indicated by a Timing Advance Command field consisting of the last 6 bits of the 12 bits of the first field.

[0231] As a sub-embodiment of the above embodiment, the timing advance for the first serving cell included in the first signaling is a timing advance adjustment amount indicated by a Timing Advance Command MAC CE consisting of the last 8 bits of the 12 bits in the first field.

[0232] As a subsidiary embodiment of the above sub-embodiment, the TAG Identity field composed of the first 2 bits of the Timing Advance Command MAC CE composed of the last 8 bits of the 12 bits of the first field is ignored, and the Timing Advance Command field composed of the last 6 bits of the Timing Advance Command MAC CE is considered to indicate the timing advance adjustment amount of the first serving cell PTAG.

[0233] As a sub-embodiment of the above embodiment, the index value of the timing advance for the first serving cell contained in the first signaling has a value range of (0, 1, 2…63).

[0234] As an embodiment, the first signaling includes the timing advance and the first identifier for the first serving cell; the first field is a Timing Advance Command field; the first field occupies 12 bits.

[0235] As a sub-embodiment of the above embodiment, the first 6 bits of the first field are set to 111110, and the last 6 bits of the first field include the timing advance of the first service cell; the first 6 bits of the first field are set to 111110 to indicate that the first signaling includes the timing advance for the first service cell.

[0236] As a sub-embodiment of the above embodiment, the first 6 bits of the first field are set to 111101, and the last 6 bits of the first field include the timing advance of the first service cell; the first 6 bits of the first field are set to 111101 to indicate that the first signaling includes the timing advance for the first service cell.

[0237] As a sub-embodiment of the above embodiment, when the first field is set to all 1s, the first field does not indicate the timing advance of the first candidate cell.

[0238] As a sub-embodiment of the above embodiment, when the value of the first field is not less than 0 and not greater than 3846, the first field indicates the timing advance of the first candidate cell.

[0239] As a sub-embodiment of the above embodiment, the first signaling is an LTM Cell Switch Command MAC CE.

[0240] As a sub-embodiment of the above embodiment, the first signaling includes DCI.

[0241] As a sub-embodiment of the above embodiment, the first signaling is DCI.

[0242] As an embodiment, the bits in the first field are continuous.

[0243] As an embodiment, the value of the first domain is less than or equal to 3846, which means that the 12 binary bits in the first domain are less than or equal to 3846.

[0244] As an embodiment, the value of the first domain is greater than 3846, which means that the 12 binary bits in the first domain are greater than 3846.

[0245] As an embodiment, the value of the first domain is less than or equal to 3846, which means that the value of the 12 binary bits in the first domain converted into decimal is less than or equal to 3846.

[0246] As an embodiment, the value of the first domain is greater than 3846, which means that the value of the 12 binary bits in the first domain after conversion to decimal is greater than 3846.

[0247] As a sub-embodiment of the above embodiment, when the timing advance for the first serving cell contained in the first signaling is that the first 5 bits of the 12 bits of the first field are not all 1, the Absolute Timing Advance Command MAC CE constituted by the 12 bits of the first field indicates the timing advance for the first candidate cell.

[0248] As a sub-embodiment of the above embodiment, when the timing advance for the first serving cell contained in the first signaling is that the first 6 bits of the 12 bits of the first field are not all 1, the Absolute Timing Advance Command MAC CE constituted by the 12 bits of the first field indicates the timing advance for the first candidate cell.

[0249] As a sub-embodiment of the above embodiment, when the timing advance for the first serving cell contained in the first signaling is that the first 5 bits of the 12 bits of the first field are all 1, the Timing Advance Command field constituted by the last 6 bits of the 12 bits of the first field indicates the adjustment amount of the timing advance for the first serving cell.

[0250] As a sub-embodiment of the above embodiment, when the timing advance for the first serving cell contained in the first signaling is that the first 5 bits of the 12 bits of the first field are all 1, the Timing Advance Command field composed of 6 bits following the first 5 bits of the first field indicates the adjustment amount of the timing advance for the first serving cell.

[0251] As a sub-embodiment of the above embodiment, when the timing advance for the first serving cell contained in the first signaling is that the first 6 bits of the 12 bits of the first field are all 1, the Timing Advance Command field constituted by the last 6 bits of the 12 bits of the first field indicates the adjustment amount of the timing advance for the first serving cell.

[0252] As an embodiment, the length of the first timer is preconfigured.

[0253] As an embodiment, the first timer is configured by the first RRC message.

[0254] As an embodiment, the first timer is configured by the first signaling.

[0255] As an embodiment, the first timer has a default value.

[0256] As an embodiment, the first timer is a timeAlignmentTimer.

[0257] As an embodiment, the name of the first timer includes timeAlignmentTimer.

[0258] As an embodiment, the uplink refers to the uplink between the first node and the first serving cell.

[0259] As an embodiment, the uplink refers to the uplink between the first node and the first candidate cell.

[0260] As an embodiment, the uplink refers to an uplink between the first node and the first candidate cell and an uplink between the first node and the first serving cell.

[0261] As an embodiment, the uplink refers to an uplink between the first node and the first candidate cell or an uplink between the first node and the first serving cell.

[0262] As an embodiment, the first serving cell is the PCell of the first node.

[0263] As an embodiment, the first serving cell is the sPCell of the first node.

[0264] As an embodiment, the first serving cell is the PSCell of the first node.

[0265] As an embodiment, the first serving cell is a serving cell of the first node.

[0266] As an embodiment, the execution of the UE-based timing advance measurement for the first candidate cell relies on the first field of the first signaling including the timing advance for the first serving cell.

[0267] As an embodiment, the performing of the UE-based timing advance measurement for the first candidate cell relies on the first field of the first signaling including the timing advance for the first serving cell and the first timer is not running.

[0268] As an embodiment, the performing of the UE-based timing advance measurement for the first candidate cell relies on the first field of the first signaling including the timing advance for the first serving cell and the first timer being running.

[0269] As an embodiment, the configuration information of the first candidate cell indicates a first time interval, and the UE-based timing advance measurement of the first candidate cell depends on the first time interval.

[0270] As an embodiment, the first time interval is the downlink transmission timing difference of the first candidate cell relative to the first serving cell.

[0271] As an embodiment, the first signaling indicates the first time interval, and the UE-based timing advance measurement of the first candidate cell depends on the first time interval.

[0272] As an embodiment, when the first time interval is not indicated in the configuration information of the first candidate cell and the first signaling, the first time interval is considered to be 0.

[0273] As an embodiment, when the first time interval is not indicated in the configuration information of the first candidate cell and the first signaling, the first time interval is ignored.

[0274] As an embodiment, when the first time interval is not indicated in the configuration information of the first candidate cell and the first signaling, it is considered that the downlink transmission of the first candidate cell and the first serving cell are synchronized.

[0275] As an embodiment, in response to the first RRC message being received, the UE-based TA measurement for the first candidate cell is performed.

[0276] As an embodiment, in response to the first RRC message being received, the UE-based TA measurement for the first candidate cell is activated.

[0277] As an embodiment, in response to the first RRC message being received, the UE-based TA measurement for the first candidate cell is not performed.

[0278] As an embodiment, the UE-based TA measurement for the first candidate cell is not performed within at least a period of time before the first signaling is received.

[0279] As an embodiment, the performing of the UE-based timing advance measurement for the first candidate cell includes: instructing a lower layer to perform the UE-based timing advance measurement for the first candidate cell.

[0280] As an embodiment, the lower layer is a physical layer.

[0281] As an embodiment, the first field of the first signaling depends on the configuration information of the first candidate cell, which means that the interpretation of the first signaling depends on the configuration information of the first candidate cell.

[0282] As an embodiment, when the configuration information of at least the first candidate cell indicates UE-based timing advance measurement for the first candidate cell, the first domain of the first signaling includes the timing advance of the first serving cell; if the configuration information of the first candidate cell indicates UE-based timing advance measurement for the first candidate cell, the first domain of the first signaling does not include the timing advance of the first serving cell.

[0283] As an embodiment, when the configuration information of at least the first candidate cell indicates UE-based timing advance measurement for the first candidate cell, the first field of the first signaling indicates activation or deactivation of UE-based timing advance measurement for the first candidate cell; if the configuration information of the first candidate cell indicates UE-based timing advance measurement for the first candidate cell, the first field of the first signaling is reserved.

[0284] As a sub-embodiment of the above embodiment, when the configuration information of at least the first candidate cell indicates UE-based timing advance measurement for the first candidate cell, the first field of the first signaling is set to 1 to indicate activation of UE-based timing advance measurement for the first candidate cell; the first field of the first signaling is set to 0 to indicate deactivation of UE-based timing advance measurement for the first candidate cell.

[0285] As an embodiment, the first signaling is a Candidate Cell TCI States Activation / Deactivation MAC CE; the first field is a bit before the Candidate Cell ID in the first signaling; the first field of the first signaling indicates activation or deactivation of UE-based timing advance measurement for the first candidate cell.

[0286] As an embodiment, the first field of the first signaling depends on the configuration information of the first candidate cell, which means that the first signaling includes the configuration information of the first field depending on the first candidate cell.

[0287] As an embodiment, when the configuration information of at least the first candidate cell indicates UE-based timing advance measurement for the first candidate cell, the first signaling includes the first domain; if the configuration information of the first candidate cell does not indicate UE-based timing advance measurement for the first candidate cell, the first signaling does not include the first domain.

[0288] As an embodiment, the first identifier of the first signaling depends on the first RRC message.

[0289] Example 2

[0290] Embodiment 2 illustrates a schematic diagram of a network architecture according to an embodiment of the present application, as shown in FIG2 . FIG2 illustrates a network architecture 200 of a 5G NR (New Radio) / LTE (Long-Term Evolution) / LTE-A (Long-Term Evolution Advanced) system. The 5G NR / LTE / LTE-A network architecture 200 may be referred to as a 5G System (5G System) / EPS (Evolved Packet System) 200 or some other appropriate terminology. The 5GS / EPS 200 includes at least one of a UE (User Equipment) 201, a RAN (Radio Access Network) 202, a 5G Core Network (5G Core Network) / EPC (Evolved Packet Core) 210, an HSS (Home Subscriber Server) / UDM (Unified Data Management) 220, and an Internet service 230. 5GS / EPS can be interconnected with other access networks, but these entities / interfaces are not shown for simplicity. As shown, 5GS / EPS provides packet-switched services, but those skilled in the art will readily appreciate that the various concepts presented throughout this application can be extended to networks providing circuit-switched services or other cellular networks. The RAN includes node 203 and other nodes 204. Node 203 provides user and control plane protocol termination towards UE 201. Node 203 can be connected to other nodes 204 via an Xn interface (e.g., backhaul) / X2 interface. Node 203 may also be referred to as a base station, base transceiver station, radio base station, radio transceiver, transceiver function, basic service set (BSS), extended service set (ESS), TRP (transmitter / receiver node), or some other appropriate terminology. Node 203 provides an access point to the 5GC / EPC 210 for UE 201. Examples of UE 201 include a cellular phone, a smart phone, a Session Initiation Protocol (SIP) phone, a laptop computer, a personal digital assistant (PDA), a satellite radio, non-terrestrial base station communications, satellite mobile communications, a global positioning system, a multimedia device, a video device, a digital audio player (e.g., an MP3 player), a camera, a game console, a drone, an aircraft, a narrowband Internet of Things device, a machine type communication device, a land vehicle, an automobile, a wearable device, or any other similarly functional device.Those skilled in the art may also refer to UE 201 as a mobile station, 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, or some other appropriate term. Node 203 is connected to 5GC / EPC 210 via an S1 / NG interface. 5GC / EPC 210 includes MME (Mobility Management Entity) / AMF (Authentication Management Field) / SMF (Session Management Function) 211, other MMEs / AMFs / SMFs 214, S-GW (Service Gateway) / UPF (User Plane Function) 212, and P-GW (Packet Data Network Gateway) / UPF 213. MME / AMF / SMF 211 is a control node that handles signaling between UE 201 and 5GC / EPC 210. Generally, MME / AMF / SMF 211 provides bearer and connection management. All user IP (Internet Protocol) packets are transmitted through S-GW / UPF 212, which is itself connected to P-GW / UPF 213. The P-GW provides UE IP address allocation and other functions. P-GW / UPF 213 is connected to Internet Services 230. Internet Services 230 includes operator-specific Internet Protocol services, which may include the Internet, intranet, IMS (IP Multimedia Subsystem), and packet-switched streaming services.

[0291] As an embodiment, the UE201 corresponds to the first node in this application.

[0292] As an embodiment, the UE 201 is a user equipment (UE).

[0293] As an embodiment, the UE 201 is a base station (BS).

[0294] As an embodiment, the UE 201 is a relay device.

[0295] As an embodiment, the UE 201 is a gateway device.

[0296] As an embodiment, the node 203 corresponds to the second node in this application.

[0297] As an embodiment, the node 203 is a base station device.

[0298] As an embodiment, the node 203 is a user equipment.

[0299] As an embodiment, the node 203 is a relay device.

[0300] As an embodiment, the node 203 is a gateway device.

[0301] Typically, the UE 201 is a user equipment, and the node 203 is a base station device.

[0302] Typically, the UE 201 is a user equipment, and the node 203 is a user equipment.

[0303] Typically, the UE 201 is a base station device, and the node 203 is a base station device.

[0304] As an embodiment, the user equipment supports transmission of a non-terrestrial network (NTN).

[0305] As an embodiment, the user equipment supports transmission via a terrestrial network (Terrestrial Network).

[0306] As an embodiment, the user equipment supports dual connection (DC) transmission.

[0307] As an embodiment, the user equipment includes an aircraft.

[0308] As an embodiment, the user equipment includes a vehicle-mounted terminal.

[0309] As an embodiment, the user equipment includes a vessel.

[0310] As an embodiment, the user equipment includes an Internet of Things terminal.

[0311] As an embodiment, the user equipment includes a terminal of the Industrial Internet of Things.

[0312] As an embodiment, the user equipment includes a device that supports low-latency and high-reliability transmission.

[0313] As an embodiment, the user equipment includes a test device.

[0314] As an embodiment, the user equipment includes a signaling tester.

[0315] As an embodiment, the user equipment includes an IAB (Integrated Access and Backhaul)-MT (Mobile Termination).

[0316] As an embodiment, the base station device supports transmission in a non-terrestrial network.

[0317] As an embodiment, the base station device supports transmission of a terrestrial network.

[0318] As an embodiment, the base station equipment includes a base transceiver station (Base Transceiver Station, BTS).

[0319] As an embodiment, the base station device includes a Node B (NB).

[0320] As an embodiment, the base station device includes a gNB.

[0321] As an embodiment, the base station device includes an eNB.

[0322] As an embodiment, the base station device includes ng-eNB.

[0323] As an embodiment, the base station device includes an en-gNB.

[0324] As an embodiment, the base station device includes a CU (Centralized Unit).

[0325] As an embodiment, the base station device includes a DU (Distributed Unit).

[0326] As an embodiment, the base station device includes a TRP (Transmitter Receiver Point).

[0327] As an embodiment, the base station device includes a macro cellular (Marco Cellular) base station.

[0328] As an embodiment, the base station device includes a micro cell base station.

[0329] As an embodiment, the base station device includes a pico cell (Pico Cell) base station.

[0330] As an embodiment, the base station device includes a home base station (Femtocell).

[0331] As an embodiment, the base station device includes a flying platform device.

[0332] As an embodiment, the base station device includes a satellite device.

[0333] As an embodiment, the base station device includes a testing device.

[0334] As an embodiment, the base station equipment includes a signaling tester.

[0335] As an embodiment, the base station device includes a gateway device.

[0336] As an embodiment, the base station device includes an IAB-node.

[0337] As an embodiment, the base station device includes an IAB-donor.

[0338] As an embodiment, the base station device includes an IAB-donor-CU.

[0339] As an embodiment, the base station device includes an IAB-donor-DU.

[0340] As an embodiment, the base station device includes an IAB-DU.

[0341] As an embodiment, the base station device includes an IAB-MT.

[0342] As an embodiment, the relay device includes a relay.

[0343] As an embodiment, the relay device includes an L3 relay.

[0344] As an embodiment, the relay device includes an L2 relay.

[0345] As an embodiment, the relay device includes a router.

[0346] As an embodiment, the relay device includes a switch.

[0347] As an embodiment, the relay device includes a gateway device.

[0348] As an embodiment, the relay device includes user equipment.

[0349] As an embodiment, the relay device includes a base station device.

[0350] Example 3

[0351] Embodiment 3 illustrates a schematic diagram of an embodiment of a radio protocol architecture for a user plane and a control plane according to the present application, as shown in FIG3 . FIG3 is a schematic diagram illustrating an embodiment of a radio protocol architecture for a user plane 350 and a control plane 300. FIG3 illustrates the radio protocol architecture for the control plane 300 using three layers: Layer 1, Layer 2, and Layer 3. Layer 1 (L1 layer) is the lowest layer and implements various PHY (physical layer) signal processing functions. The L1 layer will be referred to herein as PHY 301. Layer 2 (L2 layer) 305 is above PHY 301 and includes a MAC (Medium Access Control) sublayer 302, an RLC (Radio Link Control) sublayer 303, and a PDCP (Packet Data Convergence Protocol) sublayer 304. The PDCP sublayer 304 provides multiplexing between different radio bearers and logical channels. The PDCP sublayer 304 also provides security by encrypting data packets and supports inter-zone mobility. The RLC sublayer 303 provides segmentation and reassembly of upper layer data packets, retransmission of lost data packets, and reordering of data packets to compensate for out-of-order reception due to HARQ (Hybrid Automatic Repeat Request). The MAC sublayer 302 provides multiplexing between logical and transport channels. The MAC sublayer 302 is also responsible for allocating various radio resources (e.g., resource blocks) within a cell. The MAC sublayer 302 is also responsible for HARQ operations. The RRC (Radio Resource Control) sublayer 306 in Layer 3 (L3) of the control plane 300 is responsible for obtaining radio resources (i.e., radio bearers) and configuring lower layers using RRC signaling. The radio protocol architecture of the user plane 350 includes Layer 1 (L1) and Layer 2 (L2). The radio protocol architecture in the user plane 350 is generally identical to the corresponding layers and sublayers in the control plane 300, including the physical layer 351, the PDCP sublayer 354 in the L2 layer 355, the RLC sublayer 353 in the L2 layer 355, and the MAC sublayer 352 in the L2 layer 355. However, the PDCP sublayer 354 also provides header compression for upper layer packets to reduce radio transmission overhead. The L2 layer 355 in the user plane 350 also includes the SDAP (Service Data Adaptation Protocol) sublayer 356, which is responsible for mapping QoS flows to data radio bearers (DRBs) to support service diversity.

[0352] As an embodiment, the wireless protocol architecture in FIG3 is applicable to the first node in this application.

[0353] As an embodiment, the wireless protocol architecture in FIG3 is applicable to the second node in this application.

[0354] As an embodiment, the first RRC message in this application is generated in the RRC306.

[0355] As an embodiment, the first signaling in this application is generated in the RRC306.

[0356] As an embodiment, the first signaling in the present application is generated by the MAC302 or MAC352.

[0357] As an embodiment, the first signaling in this application is generated in the PHY301 or PHY351.

[0358] Example 4

[0359] Embodiment 4 shows a schematic diagram of a first communication device and a second communication device according to the present application, as shown in Figure 4. Figure 4 is a block diagram of a first communication device 450 and a second communication device 410 communicating with each other in an access network.

[0360] The first communication device 450 includes a controller / processor 459 , a memory 460 , a data source 467 , a transmit processor 468 , a receive processor 456 , a multi-antenna transmit processor 457 , a multi-antenna receive processor 458 , a transmitter / receiver 454 and an antenna 452 .

[0361] The second communication device 410 includes a controller / processor 475 , a memory 476 , a receive processor 470 , a transmit processor 416 , a multi-antenna receive processor 472 , a multi-antenna transmit processor 471 , a transmitter / receiver 418 , and an antenna 420 .

[0362] During transmission from the second communication device 410 to the first communication device 450, upper layer data packets from the core network are provided to the controller / processor 475 at the second communication device 410. The controller / processor 475 implements L2 layer functionality. During transmission from the second communication device 410 to the first communication device 450, the controller / processor 475 provides header compression, encryption, packet segmentation and reordering, multiplexing between logical and transport channels, and radio resource allocation to the first communication device 450 based on various priority metrics. The controller / processor 475 is also responsible for retransmission of lost packets and signaling to the first communication device 450. The transmit processor 416 and the multi-antenna transmit processor 471 implement various signal processing functions for the L1 layer (i.e., the physical layer). The transmit processor 416 implements coding and interleaving to facilitate forward error correction (FEC) at the second communication device 410, as well as mapping of signal constellations based on various modulation schemes (e.g., binary phase-shift keying (BPSK), quadrature phase-shift keying (QPSK), M-phase-shift keying (M-PSK), and M-quadrature amplitude modulation (M-QAM)). The multi-antenna transmit processor 471 performs digital spatial precoding, including codebook-based and non-codebook-based precoding, and beamforming on the coded and modulated symbols to generate one or more spatial streams. The transmit processor 416 then maps each spatial stream to a subcarrier, multiplexes it with a reference signal (e.g., a pilot) in the time and / or frequency domain, and then uses an inverse fast Fourier transform (IFFT) to generate a physical channel carrying the time-domain multicarrier symbol stream. The multi-antenna transmit processor 471 then performs transmit analog precoding / beamforming operations on the time-domain multicarrier symbol stream. Each transmitter 418 converts the baseband multi-carrier symbol stream provided by the multi-antenna transmit processor 471 into a radio frequency stream, and then provides it to a different antenna 420.

[0363] During transmission from the second communications device 410 to the first communications device 450, each receiver 454 at the first communications device 450 receives a signal via its corresponding antenna 452. Each receiver 454 recovers the information modulated onto the RF carrier and converts the RF stream into a baseband multi-carrier symbol stream, which is provided to the receive processor 456. The receive processor 456 and the multi-antenna receive processor 458 implement various L1 signal processing functions. The multi-antenna receive processor 458 performs receive analog precoding / beamforming operations on the baseband multi-carrier symbol stream from the receiver 454. The receive processor 456 converts the baseband multi-carrier symbol stream, after the receive analog precoding / beamforming operations, from the time domain to the frequency domain using a fast Fourier transform (FFT). In the frequency domain, the receive processor 456 demultiplexes the physical layer data signal and reference signal, where the reference signal is used for channel estimation. The data signal undergoes multi-antenna detection in the multi-antenna receive processor 458 to recover any spatial streams destined for the first communications device 450. The symbols on each spatial stream are demodulated and recovered in the receive processor 456, and soft decisions are generated. The receive processor 456 then decodes and deinterleaves the soft decisions to recover the upper layer data and control signals transmitted by the second communication device 410 on the physical channel. The upper layer data and control signals are then provided to the controller / processor 459. The controller / processor 459 implements the functions of the L2 layer. The controller / processor 459 may be associated with a memory 460 that stores program code and data. The memory 460 may be referred to as a computer-readable medium. During transmission from the second communication device 410 to the second communication device 450, the controller / processor 459 provides demultiplexing between transport and logical channels, packet reassembly, decryption, header decompression, and control signal processing to recover upper layer data packets from the core network. The upper layer data packets are then provided to all protocol layers above the L2 layer. Various control signals may also be provided to the L3 layer for L3 processing.

[0364] During transmission from the first communication device 450 to the second communication device 410, a data source 467 is used at the first communication device 450 to provide upper layer data packets to the controller / processor 459. The data source 467 represents all protocol layers above the L2 layer. Similar to the transmission functionality at the second communication device 410 described in the transmission from the second communication device 410 to the first communication device 450, the controller / processor 459 implements header compression, encryption, packet segmentation and reordering, and multiplexing between logical and transport channels based on radio resource allocation, implementing L2 layer functions for the user plane and control plane. The controller / processor 459 is also responsible for retransmission of lost packets and signaling to the second communication device 410. The transmit processor 468 performs modulation mapping and channel coding, while the multi-antenna transmit processor 457 performs digital multi-antenna spatial precoding, including codebook-based and non-codebook-based precoding, and beamforming. The transmit processor 468 then modulates the resulting spatial stream into a multi-carrier / single-carrier symbol stream. After analog precoding and beamforming operations in the multi-antenna transmit processor 457, the stream is provided to different antennas 452 via the transmitter 454. Each transmitter 454 first converts the baseband symbol stream provided by the multi-antenna transmit processor 457 into a RF symbol stream before providing it to the antenna 452.

[0365] During transmission from the first communications device 450 to the second communications device 410, the functionality at the second communications device 410 is similar to the reception functionality at the first communications device 450 described for transmission from the second communications device 410 to the first communications device 450. Each receiver 418 receives RF signals via its corresponding antenna 420, converts the received RF signals into baseband signals, and provides the baseband signals to a multi-antenna receive processor 472 and a receive processor 470. The receive processor 470 and the multi-antenna receive processor 472 collectively implement L1 layer functionality. A controller / processor 475 implements L2 layer functionality. The controller / processor 475 may be associated with a memory 476 storing program codes and data. The memory 476 may be referred to as a computer-readable medium. During transmission from the first communications device 450 to the second communications device 410, the controller / processor 475 provides demultiplexing between transport and logical channels, packet reassembly, decryption, header decompression, and control signal processing to recover upper layer data packets from the UE 450. Upper layer packets from controller / processor 475 may be provided to the core network.

[0366] As an embodiment, the first communication device 450 includes: at least one processor and at least one memory, the at least one memory including computer program code; the at least one memory and the computer program code are configured to be used together with the at least one processor, and the first communication device 450 at least: receives a first RRC message, the first RRC message includes configuration information of a first candidate cell, the configuration information of the first candidate cell indicates a first identifier of the first candidate cell and a UE-based timing advance measurement for the first candidate cell; receives a first signaling, the first signaling is a signaling of a protocol layer below the RRC sublayer; performs the UE-based timing advance measurement for the first candidate cell; the execution of the UE-based timing advance measurement for the first candidate cell depends on at least the former of the first field and the first timer of the first signaling, the first timer indicating whether the uplink is synchronized; the first signaling includes at least one of DCI or the timing advance for the first serving cell or the first identifier; the first field of the first signaling depends on the configuration information of the first candidate cell.

[0367] As an embodiment, the first communication device 450 includes: a memory storing a computer-readable instruction program, the computer-readable instruction program generating actions when executed by at least one processor, the actions including: receiving a first RRC message, the first RRC message including configuration information of a first candidate cell, the configuration information of the first candidate cell indicating a first identifier of the first candidate cell and a UE-based timing advance measurement for the first candidate cell; receiving a first signaling, the first signaling being a signaling of a protocol layer below the RRC sublayer; performing the UE-based timing advance measurement for the first candidate cell; the performing of the UE-based timing advance measurement for the first candidate cell depends on at least the former of a first field and a first timer of the first signaling, the first timer indicating whether the uplink is synchronized; the first signaling including at least one of DCI or timing advance for the first serving cell or the first identifier; the first field of the first signaling depends on the configuration information of the first candidate cell.

[0368] As an embodiment, the second communication device 410 includes: at least one processor and at least one memory, the at least one memory including computer program code; the at least one memory and the computer program code are configured to be used together with the at least one processor. The second communication device 410 at least: sends a first RRC message, the first RRC message including configuration information of a first candidate cell, the configuration information of the first candidate cell indicating a first identifier of the first candidate cell and a UE-based timing advance measurement for the first candidate cell; sends first signaling, the first signaling being signaling of a protocol layer below the RRC sublayer; a receiver of the first RRC message performs the UE-based timing advance measurement for the first candidate cell; the performing of the UE-based timing advance measurement for the first candidate cell depends on at least the former of a first field and a first timer of the first signaling, the first timer indicating whether the uplink is synchronized; the first signaling includes at least one of DCI or the timing advance for the first serving cell or the first identifier; the first field of the first signaling depends on the configuration information of the first candidate cell.

[0369] As an embodiment, the second communication device 410 includes: a memory storing a computer-readable instruction program, the computer-readable instruction program generates actions when executed by at least one processor, the actions including: sending a first RRC message, the first RRC message including configuration information of a first candidate cell, the configuration information of the first candidate cell indicating a first identifier of the first candidate cell and a UE-based timing advance measurement for the first candidate cell; sending a first signaling, the first signaling being a signaling of a protocol layer below the RRC sublayer; the receiver of the first RRC message performs the UE-based timing advance measurement for the first candidate cell; the execution of the UE-based timing advance measurement for the first candidate cell depends on at least the former of the first field and the first timer of the first signaling, the first timer indicating whether the uplink is synchronized; the first signaling includes at least one of DCI or the timing advance for the first serving cell or the first identifier; the first field of the first signaling depends on the configuration information of the first candidate cell.

[0370] As an embodiment, at least one of the antenna 452, the receiver 454, the receiving processor 456, and the controller / processor 459 is used to receive the first RRC message.

[0371] As an embodiment, at least one of the antenna 420, the transmitter 418, the transmit processor 416, and the controller / processor 475 is used to send the first RRC message.

[0372] As an embodiment, at least one of the antenna 452, the receiver 454, the receiving processor 456, and the controller / processor 459 is used to receive the first signaling.

[0373] As an embodiment, at least one of the antenna 420, the transmitter 418, the transmit processor 416, and the controller / processor 475 is used to send the first signaling.

[0374] As an embodiment, the first communication device 450 corresponds to the first node in this application.

[0375] As an embodiment, the second communication device 410 corresponds to the second node in this application.

[0376] As an embodiment, the first communication device 450 is a user equipment.

[0377] As an embodiment, the first communication device 450 is a base station device.

[0378] As an embodiment, the first communication device 450 is a relay device.

[0379] As an embodiment, the second communication device 410 is a user equipment.

[0380] As an embodiment, the second communication device 410 is a base station device.

[0381] As an embodiment, the second communication device 410 is a relay device.

[0382] Example 5

[0383] Example 5 illustrates a wireless signal transmission flow chart according to an embodiment of the present application, as shown in FIG5. It should be noted that the order in this example does not limit the signal transmission order and implementation order in the present application.

[0384] For the first node U01:

[0385] In step S5101, a first RRC message is received;

[0386] In step S5102, first signaling is received;

[0387] In step S5103, performing the UE-based timing advance measurement for the first candidate cell;

[0388] For the second node N02:

[0389] In step S5201, a first RRC message is sent;

[0390] In step S5202, a first signaling is sent;

[0391] In embodiment 5, the first RRC message includes configuration information of the first candidate cell, the configuration information of the first candidate cell indicates the first identifier of the first candidate cell and the UE-based timing advance measurement for the first candidate cell; the first signaling is the signaling of the protocol layer below the RRC sublayer; the execution of the UE-based timing advance measurement for the first candidate cell depends on at least the former of the first field and the first timer of the first signaling, and the first timer indicates whether the uplink is synchronized; the first signaling includes at least one of DCI or the timing advance for the first serving cell or the first identifier; the first field of the first signaling depends on the configuration information of the first candidate cell.

[0392] As an embodiment, the first node U01 and the second node N02 are connected wirelessly.

[0393] As an embodiment, the first node U01 and the second node N02 are connected via a wired connection.

[0394] As an embodiment, the first node U01 and the second node N02 are connected via a Uu port.

[0395] As an embodiment, the first node U01 and the second node N02 are connected via an IAB port.

[0396] As an embodiment, the first node U01 and the second node N02 are connected via a PC5 interface.

[0397] As an embodiment, in response to receiving the first signaling, the UE-based timing advance measurement for the first candidate cell is triggered.

[0398] As an embodiment, in response to receiving the first signaling, the UE-based timing advance measurement for the first candidate cell is activated.

[0399] As an embodiment, in response to receiving the first signaling, the UE-based timing advance measurement for the first candidate cell is deactivated.

[0400] As an embodiment, in response to the first condition being met, the UE-based timing advance measurement for the first candidate cell is deactivated.

[0401] As an embodiment, the first condition is an evaluation condition for switching to the first candidate cell of the conditional LTM.

[0402] As an embodiment, in response to the first condition being met, LTM to the first candidate cell is performed.

[0403] As an embodiment, the first condition is configured by the condExecutionCond field in the first RRC message.

[0404] As an embodiment, in response to sending an RRCReconfigurationComplete message, the UE-based timing advance measurement for the first candidate cell is deactivated.

[0405] As an embodiment, the execution of the UE-based timing advance measurement for the first candidate cell relies on a first field of the first signaling; the first signaling includes DCI.

[0406] As an embodiment, the execution of the UE-based timing advance measurement for the first candidate cell relies on a first field of the first signaling; the first signaling includes the timing advance for the first serving cell.

[0407] As an embodiment, the execution of the UE-based timing advance measurement for the first candidate cell relies on a first field and a first timer of the first signaling; the first signaling includes DCI.

[0408] As an embodiment, the execution of the UE-based timing advance measurement for the first candidate cell relies on the first field and the first timer of the first signaling; the first signaling includes the timing advance for the first serving cell.

[0409] As an embodiment, the execution of the UE-based timing advance measurement for the first candidate cell relies on the first field and the first timer of the first signaling; the first signaling includes the first identifier.

[0410] As an embodiment, the execution of the UE-based timing advance measurement for the first candidate cell relies on the first field and the first timer of the first signaling; the first signaling includes the first identifier and the TCI state.

[0411] As an embodiment, the execution of the UE-based timing advance measurement for the first candidate cell relies on the first field and the first timer of the first signaling; the first signaling includes DCI and the timing advance for the first serving cell.

[0412] As an embodiment, the execution of the UE-based timing advance measurement for the first candidate cell depends on the first field of the first signaling; the first signaling includes DCI; as a response to receiving the DCI, the execution of the UE-based timing advance measurement for the first candidate cell is triggered.

[0413] As an embodiment, the execution of the UE-based timing advance measurement for the first candidate cell depends on the first field of the first signaling; the first signaling includes the timing advance for the first serving cell; as a response to receiving the timing advance, the execution of the UE-based timing advance measurement for the first candidate cell is triggered.

[0414] As an embodiment, the execution of the UE-based timing advance measurement for the first candidate cell depends on the first domain and the first timer of the first signaling; the first signaling includes DCI; when the first timer is running, as a response to receiving the DCI, the execution of the UE-based timing advance measurement for the first candidate cell is triggered.

[0415] As an embodiment, the execution of the UE-based timing advance measurement for the first candidate cell depends on the first domain and the first timer of the first signaling; the first signaling includes DCI; when the first timer is not running, as a response to receiving the DCI, the execution of the UE-based timing advance measurement for the first candidate cell is triggered.

[0416] As an embodiment, the execution of the UE-based timing advance measurement for the first candidate cell depends on the first domain and the first timer of the first signaling; the first signaling includes the timing advance for the first serving cell; when the first timer is not running, as a response to receiving the timing advance, the execution of the UE-based timing advance measurement for the first candidate cell is triggered.

[0417] As an embodiment, the execution of the UE-based timing advance measurement for the first candidate cell depends on the first domain, first timer and second timer of the first signaling; the first signaling includes DCI; when the first timer is running and the second timer is not running, as a response to receiving the DCI, the execution of the UE-based timing advance measurement for the first candidate cell is triggered.

[0418] As an embodiment, the execution of the UE-based timing advance measurement for the first candidate cell depends on a first timer and a second timer; when the first timer is running, as a response to the expiration of the second timer, the execution of the UE-based timing advance measurement for the first candidate cell is triggered.

[0419] Example 6

[0420] Embodiment 6 illustrates a schematic diagram of performing UE-based timing advance measurement for a first candidate cell according to an embodiment of the present application depending on the first timer being running, as shown in FIG6 .

[0421] In embodiment 6, performing the UE-based timing advance measurement for the first candidate cell depends on the first timer being running; the first timer controls whether the uplink of the first serving cell is synchronized.

[0422] As an embodiment, the execution of the UE-based timing advance measurement for the first candidate cell depends on the first field of the first signaling and the first timer being running; the first field of the first signaling indicates the execution or activation of the UE-based timing advance measurement for the first candidate cell.

[0423] As an embodiment, the first timer is a timeAlignmentTimer associated with the PTAG of the first serving cell.

[0424] As an embodiment, the first timer controls whether the uplink of the first candidate cell is synchronized, which means that the first timer controls the time for uplink synchronization of the first serving cell.

[0425] As an embodiment, the first timer controls whether the uplink of the first candidate cell is synchronized, which means that the first timer is running and has not expired, indicating that the uplink of the first serving cell is in a synchronized state.

[0426] As an embodiment, the first timer controls whether the uplink of the first candidate cell is synchronized, which means that when the first timer is not running, it indicates that the uplink of the first node and the first serving cell is out of sync.

[0427] As an embodiment, the execution of the UE-based timing advance measurement for the first candidate cell depends on the first timer being running, which means that the UE-based timing advance measurement for the first candidate cell can only be performed when the first timer is running.

[0428] As an embodiment, the execution of the UE-based timing advance measurement for the first candidate cell depends on the first timer being running, which means that when the first timer is not running, the UE-based timing advance measurement for the first candidate cell cannot be performed.

[0429] As an embodiment, the execution of the UE-based timing advance measurement for the first candidate cell depends on the first timer being running, which means that the first timer being running is a necessary condition for the action to execute the UE-based timing advance measurement for the first candidate cell.

[0430] As an embodiment, in response to the first timer starting or restarting, the UE-based timing advance measurement for the first candidate cell is performed.

[0431] As an embodiment, in response to receiving the first signaling, the UE-based timing advance measurement for the first candidate cell is performed, and the first timer is started or restarted.

[0432] As a sub-embodiment of the above embodiment, the first signaling includes the timing advance command.

[0433] As a sub-embodiment of the above embodiment, the timing advance command is for the timing advance of the PTAG of the first serving cell.

[0434] As a sub-embodiment of the above embodiment, the first signaling includes a timing advance command MAC CE.

[0435] As a sub-embodiment of the above embodiment, the first signaling is a Random Access Response.

[0436] As an embodiment, when the first timer is not running, in response to receiving the first signaling, the UE-based timing advance measurement for the first candidate cell is performed, and the first timer is started or restarted.

[0437] As an embodiment, when the first timer is running, the UE-based timing advance measurement for the first candidate cell is not performed in response to receiving the first signaling.

[0438] As a sub-embodiment of the above embodiment, not performing the UE-based timing advance measurement for the first candidate cell means: not performing the first measurement process in the UE-based timing advance measurement.

[0439] As a sub-embodiment of the above embodiment, not performing the UE-based timing advance measurement for the first candidate cell means: not performing the first measurement process in the UE-based timing advance measurement, and performing the first derivation process in the UE-based timing advance measurement.

[0440] As a sub-embodiment of the above embodiment, the first timer is started or restarted in response to receiving the first signaling.

[0441] Example 7

[0442] Embodiment 7 illustrates a schematic diagram of performing UE-based timing advance measurement for a first candidate cell according to an embodiment of the present application depending on the second timer not being running, as shown in FIG7 .

[0443] In embodiment 7, performing the UE-based timing advance measurement for the first candidate cell relies on a second timer not being running; the second timer controls whether the uplink of the first candidate cell is synchronized.

[0444] As an embodiment, the execution of the UE-based timing advance measurement for the first candidate cell depends on the first field of the first signaling and the second timer not being running; the first field of the first signaling indicates the execution or activation of the UE-based timing advance measurement for the first candidate cell.

[0445] As an embodiment, the execution of the UE-based timing advance measurement for the first candidate cell depends on the first field of the first signaling, the first timer is running and the second timer is not running; the first field of the first signaling indicates the execution or activation of the UE-based timing advance measurement for the first candidate cell.

[0446] As an embodiment, the second timer is at the MAC sublayer.

[0447] As an embodiment, the second timer is at the physical layer.

[0448] As an embodiment, the second timer controls whether the uplink of the first candidate cell is synchronized, which means that the second timer controls the time for uplink synchronization of the first candidate cell.

[0449] As an embodiment, the second timer controls whether the uplink of the first candidate cell is synchronized, which means that the second timer controls whether the downlink reception timing difference between the first candidate cell and the first serving cell is valid.

[0450] As an embodiment, the second timer controls whether the uplink of the first candidate cell is synchronized, which means that when the second timer is running, the uplink of the first candidate cell is synchronized.

[0451] As an embodiment, the second timer controls whether the uplink of the first candidate cell is synchronized, which means that when the second timer is running, the downlink reception timing difference between the first candidate cell and the first serving cell is valid.

[0452] As an embodiment, the second timer controls whether the uplink of the first candidate cell is synchronized, which means that when the second timer times out or is not running, the uplink timing of the first candidate cell fails.

[0453] As an embodiment, the second timer controls whether the uplink of the first candidate cell is synchronized, which means that when the second timer times out or is not running, the downlink reception timing difference between the first candidate cell and the first serving cell becomes invalid.

[0454] As an embodiment, the second timer is a timeAlignmentTimer associated with the uplink timing advance of the first candidate cell.

[0455] As an embodiment, the second timer is a timeAlignmentTimer associated with the downlink reception timing difference between the first candidate cell and the first serving cell.

[0456] As an embodiment, performing the UE-based timing advance measurement for the first candidate cell depends on the first timer being running and the second timer not being running.

[0457] As a sub-embodiment of the above embodiment, when the first timer is running, in response to expiration of the second timer, the UE-based timing advance measurement for the first candidate cell is triggered.

[0458] As a sub-embodiment of the above embodiment, when the first timer is running and the second timer is not running, the UE-based timing advance measurement for the first candidate cell is triggered in response to receiving the first signaling.

[0459] As an embodiment, in response to the first timer not being running, the second timer is paused or reset.

[0460] As an embodiment, the second timer is started or restarted in response to completing the UE-based timing advance measurement for the first candidate cell.

[0461] As an embodiment, the second timer is started or restarted in response to the uplink timing advance of the first candidate cell being updated.

[0462] As a sub-embodiment of the above embodiment, the updating refers to updating by the UE-based timing advance measurement process.

[0463] As a sub-embodiment of the above embodiment, the updating refers to updating by at least the first measurement process in the UE-based timing advance measurement.

[0464] As a sub-embodiment of the above embodiment, the updating refers to updating by at least the first derivation process in the UE-based timing advance measurement.

[0465] As a sub-embodiment of the above embodiment, the updating refers to updating by the first measurement process in the UE-based timing advance measurement.

[0466] As a sub-embodiment of the above embodiment, the updating refers to updating by the first derivation process in the UE-based timing advance measurement.

[0467] Example 8

[0468] Embodiment 8 illustrates a schematic diagram of performing UE-based timing advance measurement for a first candidate cell according to an embodiment of the present application depending on the first timer not being running, as shown in FIG8 .

[0469] In embodiment 8, performing the UE-based timing advance measurement for the first candidate cell relies on the first timer not being running; the first timer controls whether the uplink of the first candidate cell is synchronized.

[0470] As an embodiment, the execution of the UE-based timing advance measurement for the first candidate cell depends on the first field of the first signaling and the first timer not being running; the first field of the first signaling indicates the execution or activation of the UE-based timing advance measurement for the first candidate cell.

[0471] As an embodiment, the first timer is a timeAlignmentTimer that controls whether the uplink of the first candidate cell is synchronized.

[0472] As an embodiment, expiration of the first timer triggers the UE-based timing advance measurement for the first candidate cell.

[0473] As an embodiment, in response to expiration of the first timer, the UE-based timing advance measurement for the first candidate cell is performed.

[0474] As an embodiment, the first timer is started or restarted in response to the completion of the UE-based timing advance measurement for the first candidate cell.

[0475] As an embodiment, the execution of the UE-based timing advance measurement for the first candidate cell depends on the first timer not being running, which means that the first node can only execute the UE-based timing advance measurement for the first candidate cell when the first timer is not running.

[0476] As an embodiment, the execution of the UE-based timing advance measurement for the first candidate cell depends on the first timer not being running, which means that when the first timer is running, the first node cannot perform the UE-based timing advance measurement for the first candidate cell.

[0477] As an embodiment, the execution of the UE-based timing advance measurement for the first candidate cell depends on the first timer not being running, which means that the first node can only perform the UE-based timing advance measurement for the first candidate cell when the first timer is not running and has a valid uplink timing advance of the first serving cell.

[0478] As an embodiment, the execution of the UE-based timing advance measurement for the first candidate cell depends on the first timer not being running, which means that when the first timer is not running and has a valid uplink timing advance of the first serving cell, the first signaling can trigger the UE-based timing advance measurement for the first candidate cell.

[0479] As an embodiment, the execution of the UE-based timing advance measurement for the first candidate cell depends on the first timer not being running, which means that when the first timer is not running, the first node can perform the UE-based timing advance measurement for the first candidate cell regardless of whether there is a valid uplink timing advance for the first serving cell.

[0480] As an embodiment, the execution of the UE-based timing advance measurement for the first candidate cell depends on the first timer not being running, which means: when the first timer is running, when the first node has a valid uplink timing advance for the first service cell, the first node cannot perform the UE-based timing advance measurement for the first candidate cell; when the first node does not have a valid uplink timing advance for the first service cell, the first node can perform the UE-based timing advance measurement for the first candidate cell.

[0481] As an embodiment, the execution of the UE-based timing advance measurement for the first candidate cell depends on the first timer not being running, which means: when the first timer is running, when the first node has a valid uplink timing advance for the first service cell, the first node can perform the UE-based timing advance measurement for the first candidate cell; when the first node does not have a valid uplink timing advance for the first service cell, the first node cannot perform the UE-based timing advance measurement for the first candidate cell.

[0482] As an embodiment, the first node can perform the UE-based timing advance measurement for the first candidate cell, which means that the first node can determine the timing of performing the UE-based timing advance measurement for the first candidate cell according to UE implementation.

[0483] As an embodiment, the first node can perform the UE-based timing advance measurement for the first candidate cell, which means that the first node determines the timing of performing the UE-based timing advance measurement for the first candidate cell according to signaling instructions.

[0484] Example 9

[0485] Embodiment 9 illustrates a schematic diagram of performing UE-based timing advance measurement for a first candidate cell according to an embodiment of the present application depending on activation of UE-based timing advance measurement for the first candidate cell, as shown in FIG9 .

[0486] In embodiment 9, the performing of the UE-based timing advance measurement for the first candidate cell depends on the UE-based timing advance measurement for the first candidate cell being activated; and the first signaling includes the timing advance for the first serving cell.

[0487] As an embodiment, the UE-based timing advance of the first candidate cell is activated by the first RRC message.

[0488] As an embodiment, the UE-based timing advance of the first candidate cell is activated by the first signaling.

[0489] As an embodiment, when the UE-based timing advance measurement of the first candidate cell is activated, the UE-based timing advance measurement of the first candidate cell is triggered as a response to receiving the timing advance of the first serving cell.

[0490] As an embodiment, when the UE-based timing advance measurement of the first candidate cell is not activated, as a response to receiving the timing advance for the first serving cell in the first signaling, the UE-based timing advance measurement of the first candidate cell is not triggered.

[0491] As an embodiment, as a response to receiving the timing advance command for the first serving cell in the first signaling, the UE-based timing advance measurement for the first candidate cell is activated.

[0492] As an embodiment, the activating the UE-based timing advance measurement for the first candidate cell means: after activating the UE-based timing advance measurement for the first candidate cell, allowing the first node to perform the UE-based timing advance measurement for the first candidate cell.

[0493] As an embodiment, the activating the UE-based timing advance measurement for the first candidate cell includes: after activating the UE-based timing advance measurement for the first candidate cell, performing the UE-based timing advance measurement for the first candidate cell as a response to receiving the first signaling.

[0494] As an embodiment, the activation of the UE-based timing advance measurement for the first candidate cell includes: after activating the UE-based timing advance measurement for the first candidate cell, determining the timing of the UE-based timing advance measurement for the first candidate cell based on UE implementation.

[0495] As an embodiment, the activating the UE-based timing advance measurement for the first candidate cell means: after activating the UE-based timing advance measurement for the first candidate cell, the UE-based timing advance measurement for the first candidate cell is configured.

[0496] As a sub-embodiment of the above embodiment, the configuration is performed by a first RRC configuration.

[0497] As a sub-embodiment of the above embodiment, the configuration includes a period of the UE-based timing advance measurement.

[0498] As a sub-embodiment of the above embodiment, the configuration includes the interval of the UE-based timing advance measurement.

[0499] As a sub-embodiment of the above embodiment, the configuration includes the accuracy of the UE-based timing advance measurement.

[0500] As an embodiment, the activating the UE-based timing advance measurement for the first candidate cell includes: as a response to receiving the first RRC message, activating the UE-based timing advance measurement for the first candidate cell according to the first RRC message.

[0501] As an embodiment, when the first signaling does not include the timing advance of the first candidate cell and the first signaling includes the timing advance of the first serving cell, the UE-based timing advance measurement for the first candidate cell is activated.

[0502] As an embodiment, when the first signaling does not include the timing advance of the first candidate cell and the first signaling includes the timing advance of the first serving cell, the UE-based timing advance measurement for the first candidate cell is triggered.

[0503] As an embodiment, the first signaling includes a timing advance command, and the timing advance command is that the timing advance of the first serving cell or the first candidate cell is indicated by the first domain.

[0504] Example 10

[0505] Embodiment 10 illustrates a schematic diagram of a first signaling indicating a first time interval according to an embodiment of the present application, as shown in FIG10 .

[0506] In embodiment 10, the first signaling indicates a first time interval, and the UE-based timing advance measurement of the first candidate cell depends on the first time interval.

[0507] As an embodiment, the first time interval is used for the UE-based timing advance measurement of the first candidate cell.

[0508] As an embodiment, the first time interval indicates the downlink sending timing difference.

[0509] As an embodiment, the first time interval is the downlink sending timing difference.

[0510] As an embodiment, the first time interval is a timing alignment error (TAE) between the first candidate cell and the first serving cell.

[0511] As an embodiment, the first time interval is equal to a first integer multiplied by a first unit time.

[0512] As an embodiment, the first unit time is related to a first parameter set.

[0513] As an embodiment, the first parameter set is a parameter set of a cell having a larger subcarrier spacing between the first candidate cell and the first serving cell.

[0514] As an embodiment, the first parameter set is a parameter set of a cell in which the subcarrier spacing between the first candidate cell and the first serving cell is smaller.

[0515] As an embodiment, the first parameter set is a parameter set of the first candidate cell.

[0516] As an embodiment, the first parameter set is a parameter set of the first serving cell.

[0517] As an embodiment, the first unit time is 16·(64·T_c) / 2^μ.

[0518] As an embodiment, the parameters are those corresponding to the first parameter set.

[0519] As an embodiment, the first unit time is configurable.

[0520] As an embodiment, the first unit time is configured by the first RRC message.

[0521] As an embodiment, the first unit time is configured by the first signaling.

[0522] As an embodiment, the value range of the first integer is symmetric about 0.

[0523] As an embodiment, the first integer may be a positive number or a negative number.

[0524] As an embodiment, the first signaling indicating the first time interval means that: the first signaling indicates the first integer, and the first integer indicates the first time interval.

[0525] As an embodiment, the first time interval=second integer×second unit time+first integer×first unit time.

[0526] As an embodiment, the first time interval=first offset+the first integer×the first unit time.

[0527] As an embodiment, the first offset is an integer multiple of the time slot length.

[0528] As an embodiment, the second integer indicates the first offset.

[0529] As an embodiment, the value range of the second integer is symmetric about 0.

[0530] As an embodiment, the second integer may be a positive number or a negative number.

[0531] As an embodiment, the value range of the second integer is related to the first parameter set.

[0532] As an embodiment, when the subcarrier spacing of the first parameter set is 15 kHz, the value range of the second integer is [-2, 2].

[0533] As an embodiment, when the subcarrier spacing of the first parameter set is 15 kHz, the value range of the second integer is INTEGER (-2..2).

[0534] As an embodiment, when the subcarrier spacing of the first parameter set is 30 kHz, the value range of the second integer is [-5, 5].

[0535] As an embodiment, when the subcarrier spacing of the first parameter set is 30 kHz, the value range of the second integer is INTEGER (-5..5).

[0536] As an embodiment, when the subcarrier spacing of the first parameter set is 60 kHz, the value range of the second integer is [-10, 10].

[0537] As an embodiment, when the subcarrier spacing of the first parameter set is 60kHz, the value range of the second integer is INTEGER (-10..10).

[0538] As an embodiment, when the subcarrier spacing of the first parameter set is 120 kHz, the value range of the second integer is [-20, 20].

[0539] As an embodiment, when the subcarrier spacing of the first parameter set is 120kHz, the value range of the second integer is INTEGER (-20..20).

[0540] As an embodiment, the second unit time is equal to the length of a single time slot under the first parameter set.

[0541] As an embodiment, the second unit time is equal to the length of a single time slot of the first candidate cell.

[0542] As an embodiment, the second unit time is equal to the length of a single time slot of the first service cell.

[0543] As an embodiment, when the first time interval is a positive value, it indicates that the downlink transmission timing of the first candidate cell is ahead of the downlink transmission timing of the first serving cell, and the length of the ahead time is equal to the absolute value of the first time interval.

[0544] As an embodiment, when the first time interval is a negative value, it indicates that the downlink transmission timing of the first candidate cell lags behind the downlink transmission timing of the first serving cell, and the length of the lag is equal to the absolute value of the first time interval.

[0545] As an embodiment, when the first time interval is a positive value, it indicates that the downlink transmission timing of the first serving cell is ahead of the downlink transmission timing of the first candidate cell, and the length of the ahead time is equal to the absolute value of the first time interval.

[0546] As an embodiment, when the first time interval is a negative value, it indicates that the downlink transmission timing of the first serving cell lags behind the downlink transmission timing of the first candidate cell, and the length of the lag is equal to the absolute value of the first time interval.

[0547] Example 11

[0548] Embodiment 11 illustrates a schematic diagram of the format of the first signaling according to an embodiment of the present application, as shown in FIG11 .

[0549] In embodiment 11, the first field of the first signaling indicates the execution of the UE-based timing advance measurement for the first candidate cell; the first signaling includes the first identifier; the format of the first signaling is DCI format 1_0; the first signaling includes a Frequency domain resource assignment field, and the Frequency domain resource assignment field is set to all 1s.

[0550] As an embodiment, the first domain is the 6 bits following the Frequency domain resource assignment domain.

[0551] As an embodiment, the first domain is the 7 bits after the Frequency domain resource assignment domain.

[0552] As an embodiment, the first field occupies one bit in the first signaling.

[0553] As an embodiment, the first domain is the 7th bit after the Frequency domain resource assignment domain.

[0554] As an embodiment, the first field is a UL / SUL indicator field in the first signaling.

[0555] As an embodiment, the first identifier in the first signaling indicates the first candidate cell.

[0556] As an embodiment, the first identifier is a Cell indicator field in the first signaling.

[0557] As an embodiment, the first identifier is the ltm-UE-MeasuredTA-ID field in the first signaling.

[0558] As an embodiment, the first identifier occupies multiple bits.

[0559] As an embodiment, the first identifier occupies bits.

[0560] As an embodiment, the value of C is the number of candidate cells configured with the UE-based timing advance measurement.

[0561] As an embodiment, the value of C is the configurable maximum number of LTM candidate cells.

[0562] As an embodiment, the value of C is equal to 8.

[0563] As an embodiment, the first identifier occupies 3 bits.

[0564] As an embodiment, the first identifier occupies 4 bits.

[0565] As an embodiment, the value of C depends on the first RRC signaling.

[0566] As an embodiment, the first field occupies the first bit after the PRACH Mask index field in the first signaling.

[0567] As an embodiment, the first field occupies the first bit after the PRACH retransmission indicator field in the first signaling.

[0568] As an embodiment, the first domain occupies 6 consecutive bits after the Frequency domain resource assignment domain in the first signaling.

[0569] As an embodiment, the first domain occupies the first reserved bit in the first signaling.

[0570] As an embodiment, in the first signaling, the first identifier is located after the first domain.

[0571] As an embodiment, the first identifier occupies a plurality of consecutive bits immediately following the first domain in the first signaling.

[0572] As an embodiment, the first identifier occupies the first multiple reserved bits after the first field of the first signaling.

[0573] As an embodiment, the first identifier occupies a plurality of consecutive reserved bits after the first field of the first signaling.

[0574] As an embodiment, the interpretation of the first signaling depends on the first RRC signaling.

[0575] As an embodiment, the first field is 1 bit.

[0576] As an embodiment, the first field of the first signaling indicates the execution of the UE-based timing advance measurement or early random access process for the first candidate cell.

[0577] As an embodiment, when the value of the first domain is 1, the first signaling indicates performing the UE-based timing advance measurement for the first candidate cell.

[0578] As an embodiment, when the value of the first domain is 0, the first signaling does not indicate the execution of the UE-based timing advance measurement for the first candidate cell.

[0579] As an embodiment, when the value of the first domain is 0, the first signaling indicates to perform the UE-based timing advance measurement for the first candidate cell.

[0580] As an embodiment, when the value of the first domain is 1, the first signaling does not indicate the execution of the UE-based timing advance measurement for the first candidate cell.

[0581] As an embodiment, when the value of the first domain is 0, the first signaling indicates execution of an early random access procedure for the first candidate cell.

[0582] As an embodiment, when the value of the first domain is 1, the first signaling does not indicate the execution of an early random access procedure for the first candidate cell.

[0583] As an embodiment, when the value of the first domain is 1, the first signaling indicates execution of an early random access procedure for the first candidate cell.

[0584] As an embodiment, when the value of the first domain is 0, the first signaling does not indicate the execution of an early random access procedure for the first candidate cell.

[0585] As an embodiment, the first signaling includes configuration information required to perform the UE-based timing advance measurement process for the first candidate cell.

[0586] As a sub-embodiment of the above embodiment, the configuration information is after the first field.

[0587] As a sub-embodiment of the above embodiment, the configuration information includes the first identifier.

[0588] As a sub-embodiment of the above embodiment, the configuration information includes the ID of the first candidate cell.

[0589] As a sub-embodiment of the above embodiment, the configuration information includes the first time interval.

[0590] As a sub-embodiment of the above embodiment, the configuration information includes a TAE between the first candidate cell and the first serving cell.

[0591] As a sub-embodiment of the above embodiment, the configuration information includes a downlink transmission timing difference between the first candidate cell and the first serving cell.

[0592] As a sub-embodiment of the above embodiment, the configuration information includes the SS / PBCH index of the first candidate cell.

[0593] As a sub-embodiment of the above embodiment, the configuration information includes the TCI state ID of the first candidate cell.

[0594] As a sub-embodiment of the above embodiment, the configuration information includes the SS / PBCH index or TCI state ID of the first candidate cell.

[0595] As an embodiment, only when the Random Access Preamble index field in the first signaling is set to 0b000000, the first field of the first signaling indicates the execution of the UE-based timing advance measurement for the first candidate cell; the first field of the first signaling is a field after the Random Access Preamble index field.

[0596] As an embodiment, the first field includes the Random Access Preamble index field.

[0597] As an embodiment, at least when the value of a Random Access Preamble index field in the first signaling is equal to 0b000000, the first signaling indicates the execution of the UE-based timing advance measurement for the first candidate cell; otherwise, the first signaling does not indicate the execution of the UE-based timing advance measurement for the first candidate cell.

[0598] As an embodiment, at least when the bits of the Frequency domain resource assignment field in the first signaling are all 1s and the value of the Random Access Preamble index field is equal to 0b000000 and there is any bit that is not 0 after the Random Access Preamble index field, the first signaling indicates the execution of the UE-based timing advance measurement for the first candidate cell; otherwise, the first signaling does not indicate the execution of the UE-based timing advance measurement for the first candidate cell.

[0599] As a sub-embodiment of the above embodiment, when the bits of the Frequency domain resource assignment field in the first signaling are all 1s and the value of the Random Access Preamble index field is equal to 0b000000 and any bit after the Random Access Preamble index field is 0, the first signaling instructs the user to perform CBRA on the first serving cell.

[0600] As a sub-embodiment of the above embodiment, the first field includes a Cell indicator field.

[0601] As a sub-embodiment of the above embodiment, the Cell indicator field indicates that early uplink synchronization is performed on a cell, or indicates that a cell performs UE-based timing advance measurement, or indicates that contention-based random access (CBRA) is performed on the first serving cell.

[0602] As a sub-embodiment of the above embodiment, the occupation of the Cell indicator field bits.

[0603] As a sub-embodiment of the above embodiment, X depends on whether the value of the Random Access Preamble index is 0b000000.

[0604] As a subsidiary embodiment of the above sub-embodiment, when the value of the Random Access Preamble index is not 0b000000, X is the number of candidate cells configured with the high-level parameter EarlyUlSyncConfig; when the value of the Random Access Preamble index is not 0b000000, if the EarlyUlSyncConfig parameter is not configured, the Cell indicator field is reserved.

[0605] As a subsidiary embodiment of the above sub-embodiment, when the value of the Random Access Preamble index is 0b000000, X is the number of candidate cells configured with UE-based timing advance measurement; when the value of the Random Access Preamble index is 0b000000, if any candidate cell configured with UE-based timing advance measurement is not configured, the Cell indicator field is reserved.

[0606] As a subsidiary embodiment of the above sub-embodiment, when the value of the Random Access Preamble index is 0b000000, X is the number of configured LTM candidate cells. If no LTM candidate cell is configured, the Cell indicator field is reserved.

[0607] As a subsidiary embodiment of the above sub-embodiment, when the value of the Random Access Preamble index is 0b000000, X is 8; if no LTM candidate cell is configured, the Cell indicator field is reserved.

[0608] As a sub-embodiment of the above embodiment, the Cell indicator field is all 0s to indicate the first serving cell.

[0609] As a sub-embodiment of the above embodiment, when the bits of the Frequency domain resource assignment field in the first signaling are all 1s and the value of the Random Access Preamble index field is equal to 0b000000 and the Cell indicator field is all 0s, the first signaling instructs the user to perform CBRA on the first serving cell.

[0610] As a sub-embodiment of the above embodiment, when the value of the Random Access Preamble index field is equal to 0b000000 and the Cell indicator field is not all 0s, the Cell indicator indicates that the UE-based timing advance measurement is performed on the first candidate cell.

[0611] As a sub-embodiment of the above embodiment, when the value of the Random Access Preamble index field is not equal to 0b000000 and the Cell indicator field is not all 0s, the Cell indicator indicates that a Preamble is sent on the first candidate cell to perform early uplink synchronization.

[0612] As an embodiment, the first identifier occupies a plurality of consecutive bits immediately following the first domain in the first signaling.

[0613] As an embodiment, the first identifier occupies a plurality of consecutive bits immediately following the Random Access Preamble index field in the first signaling.

[0614] As an embodiment, the first identifier occupies a plurality of consecutive bits immediately following the Cell indicator field in the first signaling.

[0615] As an embodiment, the first signaling includes the configuration information required to perform the UE-based timing advance measurement process for the first candidate cell.

[0616] As a sub-embodiment of the above embodiment, the configuration information is after the first field.

[0617] As a sub-embodiment of the above embodiment, the configuration information is after the Random Access Preamble index field.

[0618] As a sub-embodiment of the above embodiment, the configuration information follows the Cell indicator field.

[0619] As a sub-embodiment of the above embodiment, the configuration information follows the first identifier.

[0620] Example 12

[0621] Embodiment 12 illustrates a structural block diagram of a processing device in a first node according to an embodiment of the present application, as shown in FIG12. In FIG12, a first processor 1200 in the first node includes a first transmitter 1201 and a first receiver 1202.

[0622] The first processor 1200 receives a first RRC message, where the first RRC message includes configuration information of a first candidate cell, where the configuration information of the first candidate cell indicates a first identifier of the first candidate cell and a UE-based timing advance measurement for the first candidate cell; receives first signaling, where the first signaling is signaling of a protocol layer below the RRC sublayer; and performs the UE-based timing advance measurement for the first candidate cell.

[0623] In embodiment 12, the execution of the UE-based timing advance measurement for the first candidate cell depends on at least the former of the first field and the first timer of the first signaling, and the first timer indicates whether the uplink is synchronized; the first signaling includes DCI or the timing advance for the first serving cell or at least one of the first identifier; the first field of the first signaling depends on the configuration information of the first candidate cell.

[0624] As an embodiment, the performing of the UE-based timing advance measurement for the first candidate cell depends on the first timer being running; the first timer controls whether the uplink of the first serving cell is synchronized.

[0625] As an embodiment, the performing of the UE-based timing advance measurement for the first candidate cell relies on a second timer not being running; the second timer controls whether the uplink of the first candidate cell is synchronized.

[0626] As an embodiment, the performing of the UE-based timing advance measurement for the first candidate cell relies on the first timer not being running; the first timer controls whether the uplink of the first candidate cell is synchronized.

[0627] As an embodiment, the performing of the UE-based timing advance measurement for the first candidate cell depends on the UE-based timing advance measurement for the first candidate cell being activated; the first signaling includes the timing advance for the first serving cell.

[0628] As an embodiment, the first signaling indicates a first time interval, and the UE-based timing advance measurement of the first candidate cell depends on the first time interval.

[0629] As an embodiment, the first field of the first signaling indicates the execution of the UE-based timing advance measurement for the first candidate cell; the first signaling includes the first identifier; the format of the first signaling is DCI format 1_0; the first signaling includes a Frequency domain resource assignment field, and the Frequency domain resource assignment field is set to all 1s.

[0630] As an embodiment, the first receiver 1202 includes at least one of the antenna 452 or the receiver 454 or the multi-antenna receiving processor 458 or the receiving processor 456 or the controller / processor 459 or the memory 460 or the data source 467 in FIG. 4 of the present application.

[0631] As an embodiment, the first receiver 1202 includes at least the antenna 452 and the receiver 454 in FIG. 4 of the present application.

[0632] As an embodiment, the first transmitter 1201 includes at least one of the antenna 452 or transmitter 454 or multi-antenna transmission processor 457 or transmission processor 468 or controller / processor 459 or memory 460 or data source 467 in FIG4 of the present application.

[0633] As an embodiment, the first transmitter 1201 includes at least the antenna 452 and the transmitter 454 in FIG. 4 of the present application.

[0634] Example 13

[0635] Embodiment 13 illustrates a structural block diagram of a processing device in a second node according to an embodiment of the present application, as shown in FIG13. In FIG13, a second processor 1300 in the second node includes a second transmitter 1301 and a second receiver 1302.

[0636] The second transmitter 1301 sends a first RRC message, where the first RRC message includes configuration information of a first candidate cell, where the configuration information of the first candidate cell indicates a first identifier of the first candidate cell and a UE-based timing advance measurement for the first candidate cell; and sends a first signaling, where the first signaling is signaling of a protocol layer below the RRC sublayer.

[0637] In embodiment 13, the receiver of the first RRC message performs the UE-based timing advance measurement for the first candidate cell; the execution of the UE-based timing advance measurement for the first candidate cell depends on at least the former of the first field and the first timer of the first signaling, and the first timer indicates whether the uplink is synchronized; the first signaling includes at least one of DCI or the timing advance for the first serving cell or the first identifier; the first field of the first signaling depends on the configuration information of the first candidate cell.

[0638] As an embodiment, the performing of the UE-based timing advance measurement for the first candidate cell depends on the first timer being running; the first timer controls whether the uplink of the first serving cell is synchronized.

[0639] As an embodiment, the performing of the UE-based timing advance measurement for the first candidate cell relies on a second timer not being running; the second timer controls whether the uplink of the first candidate cell is synchronized.

[0640] As an embodiment, the performing of the UE-based timing advance measurement for the first candidate cell relies on the first timer not being running; the first timer controls whether the uplink of the first candidate cell is synchronized.

[0641] As an embodiment, the performing of the UE-based timing advance measurement for the first candidate cell depends on the UE-based timing advance measurement for the first candidate cell being activated; the first signaling includes the timing advance for the first serving cell.

[0642] As an embodiment, the first signaling indicates a first time interval, and the UE-based timing advance measurement of the first candidate cell depends on the first time interval.

[0643] As an embodiment, the first field of the first signaling indicates the execution of the UE-based timing advance measurement for the first candidate cell; the first signaling includes the first identifier; the format of the first signaling is DCI format 1_0; the first signaling includes a Frequency domain resource assignment field, and the Frequency domain resource assignment field is set to all 1s.

[0644] As an embodiment, the second transmitter 1301 includes at least one of the antenna 420 or the transmitter 418 or the multi-antenna transmission processor 471 or the transmission processor 416 or the controller / processor 475 or the memory 476 in FIG. 4 of the present application.

[0645] As an embodiment, the second transmitter 1301 includes at least the antenna 420 and the transmitter 418 in FIG. 4 of the present application.

[0646] As an embodiment, the second receiver 1302 includes at least one of the antenna 420 or the receiver 418 or the multi-antenna receiving processor 472 or the receiving processor 470 or the controller / processor 475 or the memory 476 in FIG. 4 of the present application.

[0647] As an embodiment, the second receiver 1302 includes at least the antenna 420 and the receiver 418 in FIG. 4 of the present application.

[0648] Example 14

[0649] Embodiment 14 illustrates a schematic diagram of a first signaling format according to an embodiment of the present application, as shown in FIG14 .

[0650] In embodiment 14, the first signaling is a MAC CE; the first signaling includes at least a first bit map, at least one bit in the first bit map is mapped one-to-one to at least one candidate cell, the first candidate cell is one of the at least one candidate cell, and the first bit map includes a first bit, and the first bit indicates the first identifier.

[0651] As an embodiment, a first RRC message is received, the first RRC message includes configuration information of a first candidate cell, the configuration information of the first candidate cell indicates a first identifier of the first candidate cell and a UE-based timing advance measurement for the first candidate cell; a first signaling is received, the first signaling is a MAC CE; the UE-based timing advance measurement for the first candidate cell is performed; wherein the execution of the UE-based timing advance measurement for the first candidate cell depends on at least the former of the first field and the first timer of the first signaling, the first timer indicates whether the uplink is synchronized; the first signaling includes at least a first bit map, at least one bit in the first bit map is mapped one-to-one to at least one LTM candidate cell, and one bit in the first bit map indicates the first identifier; the first field of the first signaling depends on the configuration information of the first candidate cell.

[0652] As an embodiment, the first signaling is a Candidate Cell TCI States (or State) Activation / Deactivation MAC CE.

[0653] As an embodiment, the first signaling is a UE based Timing Advance (TA) Measurement Activation / Deactivation MAC CE.

[0654] As an embodiment, the name of the first signaling includes at least one of UE or based or TA or Timing or Advance or Measurement or Activation / Deactivation.

[0655] As an embodiment, the name of the first signaling includes at least one of Candidate Cell or TCI States or TCI State or UE or TA or Timing or Advance or Measurement or Activation / Deactivation.

[0656] As an embodiment, the size of the first bitmap is 8 bits.

[0657] As an embodiment, the size of the first bitmap is less than 8 bits.

[0658] As an embodiment, the at least one candidate cell is the first candidate cell.

[0659] As an embodiment, the at least one candidate cell is a plurality of candidate cells, and the first candidate cell is one of the plurality of candidate cells.

[0660] As an embodiment, the at least one candidate cell is configured by the first RRC message.

[0661] As an embodiment, the at least one candidate cell is configured to a cell group of the first node.

[0662] As an embodiment, any candidate cell among the at least one candidate cell is an LTM candidate cell.

[0663] As an embodiment, any candidate cell among the at least one candidate cell is an LTM candidate cell configured with early uplink synchronization.

[0664] As an embodiment, any candidate cell among the at least one candidate cell is an LTM candidate cell configured with CG resources.

[0665] As an embodiment, mapping at least one bit in the first bit map to at least one candidate cell one by one means that at least one bit in the first bit map corresponds to the at least one candidate cell respectively.

[0666] As an embodiment, mapping at least one bit in the first bit map to at least one candidate cell one by one means that each bit in the at least one bit in the first bit map indicates a candidate cell in the at least one candidate cell.

[0667] As an embodiment, the bits corresponding to the at least one candidate cell in the first bitmap are sorted in ascending order of LTM-CandidateId.

[0668] As an embodiment, the bits corresponding to the at least one candidate cell in the first bitmap are sorted in descending order of LTM-CandidateId.

[0669] As an embodiment, the first bit map occupies the at least one continuous bit of an octet starting from the most significant bit.

[0670] As an embodiment, the first bit map occupies the at least one continuous bit of an octet starting from the least significant bit.

[0671] As an embodiment, the size of the first bitmap is equal to the number of the at least one candidate cell.

[0672] As an embodiment, the first signaling includes configuration information of the TCI status of the candidate cell.

[0673] As an embodiment, the configuration information of the TCI status of the candidate cell includes an octet.

[0674] As an embodiment, the configuration information of the TCI status of the candidate cell includes multiple octets.

[0675] As an embodiment, the size of the configuration information of the TCI status of the candidate cell is variable.

[0676] As an embodiment, the configuration information of the TCI status of the candidate cell includes an octet containing a Xi domain and an octet containing a Pi domain, the octet containing the Xi domain and the octet containing the Pi domain correspond one to one, and each Xi domain indicates whether the corresponding Pi domain exists; the i is an integer not less than 1 and not greater than 8.

[0677] As a sub-embodiment of the above embodiment, each Xi field occupies 1 bit, and each Pi field occupies 1 bit.

[0678] As a sub-embodiment of the above embodiment, if a Xi field is 1, it indicates that the corresponding Pi field exists; if a Xi field is 0, it indicates that the corresponding Pi field does not exist.

[0679] As a sub-embodiment of the above embodiment, if a Xi field is 0, it indicates that the corresponding Pi field exists; if a Xi field is 1, it indicates that the corresponding Pi field does not exist.

[0680] As a sub-embodiment of the above embodiment, when a Xi field indicates that the corresponding Pi field exists, the Pi field corresponding to the Xi field indicates one TCI state or two TCI states.

[0681] As a sub-embodiment of the above embodiment, when a Xi domain indicates that the corresponding Pi domain does not exist, the Xi domain is reserved.

[0682] As a sub-embodiment of the above embodiment, the Xi domain is only for the convenience of description and can be replaced by other letters to achieve the same effect.

[0683] As an embodiment, the configuration information of the TCI state of the candidate cell includes an octet containing a Pi field, and each Pi field in the octet containing the Pi field indicates one TCI state or one of two TCI states.

[0684] As an embodiment, the configuration information of the TCI state of the candidate cell includes at least one octet, and each octet in the at least one octet contains a TCI state ID field.

[0685] As an embodiment, one bit in the first bit map indicates whether the first signaling includes configuration information of the TCI status of the candidate cell corresponding to the one bit.

[0686] As a sub-embodiment of the above embodiment, a bit in the first bit map is 1, indicating that the first signaling includes the configuration information of the TCI status of the candidate cell corresponding to the one bit; a bit in the first bit map is 0, indicating that the first signaling does not include the configuration information of the TCI status of the candidate cell corresponding to the one bit; the first bit is 1.

[0687] As a sub-embodiment of the above embodiment, a bit in the first bit map is 0, indicating that the first signaling includes the configuration information of the TCI status of the candidate cell corresponding to the one bit; a bit in the first bit map is 1, indicating that the first signaling does not include the configuration information of the TCI status of the candidate cell corresponding to the one bit; the first bit is 0.

[0688] As an embodiment, one bit in the first bitmap indicates whether to perform the UE-based timing advance measurement of the candidate cell corresponding to the one bit.

[0689] As a sub-embodiment of the above embodiment, a bit in the first bit map is 0, indicating that the UE-based timing advance measurement of the candidate cell corresponding to the bit is performed; a bit in the first bit map is 1, not indicating that the UE-based timing advance measurement of the candidate cell corresponding to the bit is performed; the first bit is 0.

[0690] As a sub-embodiment of the above embodiment, a bit in the first bit map is 1, indicating that the UE-based timing advance measurement of the candidate cell corresponding to the bit is performed; a bit in the first bit map is 0, not indicating that the UE-based timing advance measurement of the candidate cell corresponding to the bit is performed; the first bit is 1.

[0691] As a sub-embodiment of the above embodiment, the indication of execution refers to indicating whether to activate; the indication of execution refers to indicating activation; the non-indication of execution refers to not indicating activation; and the first bit is 0.

[0692] As a sub-embodiment of the above embodiment, the indication of whether to execute refers to: indicating activation or deactivation; the indication of execution refers to: indicating activation; the non-indication of execution refers to: indicating deactivation; the first bit is 1.

[0693] As an embodiment, the first signaling includes the first bit map and the second bit map; one bit in the first bit map indicates whether to perform the UE-based timing advance measurement of the candidate cell corresponding to the one bit; and one bit in the second bit map indicates whether the first signaling includes configuration information of the TCI status of the candidate cell corresponding to the one bit.

[0694] As a sub-embodiment of the above embodiment, a bit in the second bit map is 1, indicating that the first signaling includes the configuration information of the TCI status of the candidate cell corresponding to the one bit; a bit in the second bit map is 0, indicating that the first signaling does not include the configuration information of the TCI status of the candidate cell corresponding to the one bit; and the first bit is 1.

[0695] As a sub-embodiment of the above embodiment, a bit in the second bit map is 0, indicating that the first signaling includes the configuration information of the TCI status of the candidate cell corresponding to the one bit; a bit in the second bit map is 1, indicating that the first signaling does not include the configuration information of the TCI status of the candidate cell corresponding to the one bit; and the first bit is 0.

[0696] As an embodiment, the first signaling includes the first bit map, and the first signaling includes a Candidate Cell ID field, and the Candidate Cell ID field indicates the execution of the UE-based timing advance measurement of the candidate cell corresponding to the one bit; a bit in the first bit map indicates whether the first signaling includes configuration information of the TCI status of the candidate cell corresponding to the one bit.

[0697] As an embodiment, the first signaling includes the first bit map, and the first signaling includes a Candidate Cell ID field, the Candidate Cell ID field indicating the activation of the UE-based timing advance measurement of the candidate cell corresponding to the one bit; a bit in the first bit map indicates whether the first signaling includes configuration information of the TCI status of the candidate cell corresponding to the one bit.

[0698] As an embodiment, when the first signaling does not include the configuration information of the TCI state of a certain candidate cell, the activated TCI state of the certain candidate cell remains unchanged.

[0699] As an embodiment, all dashed boxes F14.1 in FIG. 14 are optional.

[0700] As an example, all the dotted boxes F14.1 in FIG. 14 exist.

[0701] As an example, all the dotted boxes F14.1 in FIG. 14 do not exist.

[0702] As an embodiment, the deactivation of the TCI state of the first node candidate cell by the first signaling is implicit.

[0703] As a sub-embodiment of the above embodiment, when the first signaling does not include the configuration information of the TCI state of a certain candidate cell, all activated TCI state information of the certain candidate cell is deactivated.

[0704] As a sub-embodiment of the above embodiment, when the configuration information of the TCI state of a candidate cell corresponding to a candidate cell in the first signaling does not include a previously activated TCI state, the previously activated TCI state is deactivated.

[0705] As a sub-embodiment of the above embodiment, all previously activated TCI states of the candidate cells except the TCI state included in the configuration information of the TCI state of the candidate cells in the first signaling are deactivated.

[0706] As an embodiment, FIG14 only illustrates a possible implementation form of the first signaling, and does not limit the specific implementation or standard to adopt other similar forms to achieve the same or similar technical effects.

[0707] Those skilled in the art will appreciate that all or part of the steps in the above method can be completed by instructing relevant hardware through a program, and the program can be stored in a computer-readable storage medium, such as a read-only memory, a hard disk or an optical disk. Optionally, all or part of the steps in the above embodiment can also be implemented using one or more integrated circuits. Accordingly, each module unit in the above embodiment can be implemented in the form of hardware or in the form of a software functional module. This application is not limited to any specific form of combination of software and hardware. The user equipment, terminal and UE in this application include but are not limited to drones, communication modules on drones, remote-controlled aircraft, aircraft, small aircraft, mobile phones, tablet computers, notebooks, vehicle-mounted communication equipment, wireless sensors, internet cards, Internet of Things terminals, RFID terminals, NB-IOT terminals, MTC (Machine Type Communication) terminals, eMTC (enhanced MTC) terminals, data cards, internet cards, vehicle-mounted communication equipment, low-cost mobile phones, low-cost tablet computers and other wireless communication devices. The base stations or system devices in this application include but are not limited to macrocell base stations, microcell base stations, home base stations, relay base stations, gNB (NR node B) NR node B, TRP (Transmitter Receiver Point) and other wireless communication devices.

[0708] The above description is only a preferred embodiment of the present application and is not intended to limit the scope of protection of the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A first node used for wireless communication, characterized in that: include: A first processor is configured to receive a first RRC message, where the first RRC message includes configuration information of a first candidate cell, where the configuration information of the first candidate cell indicates a first identifier of the first candidate cell and a UE-based timing advance measurement for the first candidate cell; receiving first signaling, where the first signaling is signaling of a protocol layer below an RRC sublayer; and performing the UE-based timing advance measurement for the first candidate cell; Among them, the execution of the UE-based timing advance measurement for the first candidate cell depends on at least the former of the first field and the first timer of the first signaling, and the first timer indicates whether the uplink is synchronized; the first signaling includes DCI or the timing advance for the first serving cell or at least one of the first identifier; the first field of the first signaling depends on the configuration information of the first candidate cell.

2. The first node according to claim 1, wherein: The performing of the UE-based timing advance measurement for the first candidate cell depends on the first timer being running; the first timer controls whether the uplink of the first serving cell is synchronized.

3. The first node according to claim 2, characterized in that The performing of the UE-based timing advance measurement for the first candidate cell relies on a second timer not being running; the second timer controls whether an uplink of the first candidate cell is synchronized.

4. The first node according to claim 1, characterized in that The performing of the UE-based timing advance measurement for the first candidate cell relies on the first timer not being running; the first timer controls whether the uplink of the first candidate cell is synchronized.

5. The first node according to any one of claims 1 to 4, characterized in that: The performing of the UE-based timing advance measurement for the first candidate cell depends on the UE-based timing advance measurement for the first candidate cell being activated; the first signaling includes the timing advance for the first serving cell.

6. The first node according to any one of claims 1 to 5, characterized in that: The first signaling indicates a first time interval, and the UE-based timing advance measurement of the first candidate cell depends on the first time interval.

7. The first node according to any one of claims 1 to 6, characterized in that: The first field of the first signaling indicates the execution of the UE-based timing advance measurement for the first candidate cell; the first signaling includes the first identifier; the format of the first signaling is DCI format 1_0; the first signaling includes a Frequency domain resource assignment field, and the Frequency domain resource assignment field is set to all 1s.

8. A second node used for wireless communication, characterized in that: include: The second processor sends a first RRC message, where the first RRC message includes configuration information of a first candidate cell, where the configuration information of the first candidate cell indicates a first identifier of the first candidate cell and a UE-based timing advance measurement for the first candidate cell; Sending first signaling, where the first signaling is signaling of a protocol layer below the RRC sublayer; a receiver of the first RRC message performs the UE-based timing advance measurement for the first candidate cell; Among them, the execution of the UE-based timing advance measurement for the first candidate cell depends on at least the former of the first field and the first timer of the first signaling, and the first timer indicates whether the uplink is synchronized; the first signaling includes DCI or the timing advance for the first serving cell or at least one of the first identifier; the first field of the first signaling depends on the configuration information of the first candidate cell.

9. A method in a first node for wireless communication, characterized in that: include: receiving a first RRC message, where the first RRC message includes configuration information of a first candidate cell, where the configuration information of the first candidate cell indicates a first identifier of the first candidate cell and a UE-based timing advance measurement for the first candidate cell; receiving first signaling, where the first signaling is signaling of a protocol layer below an RRC sublayer; and performing the UE-based timing advance measurement for the first candidate cell; Among them, the execution of the UE-based timing advance measurement for the first candidate cell depends on at least the former of the first field and the first timer of the first signaling, and the first timer indicates whether the uplink is synchronized; the first signaling includes DCI or the timing advance for the first serving cell or at least one of the first identifier; the first field of the first signaling depends on the configuration information of the first candidate cell.

10. A method used in a second node of wireless communication, characterized in that: include: Sending a first RRC message, where the first RRC message includes configuration information of a first candidate cell, where the configuration information of the first candidate cell indicates a first identifier of the first candidate cell and a UE-based timing advance measurement for the first candidate cell; Sending first signaling, where the first signaling is signaling of a protocol layer below the RRC sublayer; a receiver of the first RRC message performs the UE-based timing advance measurement for the first candidate cell; Among them, the execution of the UE-based timing advance measurement for the first candidate cell depends on at least the former of the first field and the first timer of the first signaling, and the first timer indicates whether the uplink is synchronized; the first signaling includes DCI or the timing advance for the first serving cell or at least one of the first identifier; the first field of the first signaling depends on the configuration information of the first candidate cell.

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