Method and apparatus in communication node used for wireless communication

Abstract

The invention discloses a method and an apparatus in a communication node used for wireless communication. A communication node receives a first RRC message, the first RRC message comprising 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, wherein the first signaling is a signaling of a protocol layer under an RRC sub-layer; performing the UE-based timing advance measurement for the first candidate cell; according to the scheme provided by the invention, the enhancement of the UE-based timing advance measurement of the LTM is facilitated, the improvement of the accuracy of the TA of the LTM candidate cell is facilitated, and the improvement of the robustness of the switching process is facilitated.

Description

Technical Field

[0001] This application relates to a transmission method and apparatus in a wireless communication system, and particularly to a method and apparatus based on UE-based TA measurement (UE-based Timing Advance measurement). Background Art

[0002] With the continuous development of wireless communication, the requirements for mobility, transmission delay, and system capacity are getting higher and higher. 3GPP has completed the standardization work of L1 (Layer 1) / L2 (Layer 2) Triggered Mobility (LTM) through the "Further NR mobility enhancements" research project (Work Item, WI); to further enhance mobility, conditional LTM or inter-CU LTM has become an important research content in 3GPP Release 19.

[0003] To enhance the LTM process, LTM supports UE-based timing advance measurement. The UE derives the uplink timing advance of the LTM candidate cell by measuring the downlink reception timing difference between the serving cell and the LTM candidate cell and the uplink timing advance of the serving cell. To improve the robustness of early LTM synchronization, it is necessary to improve the triggering mechanism of UE-based timing advance measurement in LTM; in addition, considering that UE-based timing advance measurement can significantly reduce the signaling overhead during the handover process, applying early uplink synchronization to conditional LTM or inter-CU LTM or CHO or CPC has good standardization prospects. Summary of the Invention

[0004] The inventors have found through research that in the existing LTM early synchronization process, the activation and triggering mechanism of UE-based timing advance measurement is not yet perfect, and inappropriate UE-based timing advance measurement may affect the normal downlink communication of the serving cell, cause the TA of the candidate cell to be invalid, and reduce the robustness of the LTM process. Therefore, it is necessary to enhance the UE-based timing advance measurement process.

[0005] In view of the above problems, the present application provides a solution. In the above problem description, the NR system is taken as an example. The present application is also applicable to scenarios of systems such as LTE (Long-Term Evolution), LTE-A (Long-Term Evolution Advanced), or future 6G, and achieves technical effects similar to those of the NR system. Further, although the present application provides specific implementation manners for 3GPP systems, the present application can also be used in scenarios of non-3GPP systems and achieve technical effects similar to those of 3GPP systems. Further, adopting a unified design solution for different scenarios also helps to reduce hardware complexity and cost. Further, although the original intention of the present application is for the Uu air interface, the present application can also be used for the PC5 interface and achieve technical effects similar to those of the Uu air interface. Further, although the original intention of the present application is for LTM, the present application can also be used for conditional LTM, or continuous LTM, or SCPAC, or CHO, or CPC, etc., and achieve technical effects similar to those of LTM. Further, although the original intention of the present application is for the terminal-to-base station scenario, the present application is also equally applicable to the V2X (Vehicle-to-Everything) scenario, the communication scenarios between the terminal and the relay, and between the relay and the base station, and achieves technical effects similar to those in the terminal-to-base station scenario. Further, although the original intention of the present application is for the terminal-to-base station scenario, the present application is also equally applicable to the communication scenario of IAB (Integrated Access and Backhaul) and achieves technical effects similar to those in the terminal-to-base station scenario. Further, although the original intention of the present application is for the terrestrial network (TN) scenario, the present application is also equally applicable to the communication scenario of the non-terrestrial network (NTN) and achieves technical effects similar to those in the TN scenario. In addition, adopting a unified solution for different scenarios also helps to reduce hardware complexity and cost.

[0006] As an example, the interpretation of the terms in the present application refers to the definitions in the 3GPP specification protocol series TS36.

[0007] As an example, the interpretation of the terms in the present application refers to the definitions in the 3GPP specification protocol series TS38.

[0008] As an example, the interpretation of the terms in the present application refers to the definitions in the 3GPP specification protocol series TS37.

[0009] It should be noted that, without conflict, the embodiments and features in any node of this application can be applied to any other node. Without conflict, the embodiments and features in the embodiments of this application can be combined with each other arbitrarily.

[0010] This application discloses a method used in a first node for wireless communication, which is characterized by including:

[0011] Receiving a first RRC message, where the first RRC message includes configuration information of a first candidate cell, and the configuration information of the first candidate cell indicates a first identifier of the first candidate cell and UE-based timing advance measurement for the first candidate cell; receiving a first signaling, where the first signaling is a signaling of a protocol layer below the RRC sublayer; and performing the UE-based timing advance measurement for the first candidate cell.

[0012] Wherein, the performance of the UE-based timing advance measurement for the first candidate cell depends on at least the former of a first field of the first signaling and a first timer, and the first timer indicates whether the uplink is synchronized; the first signaling includes at least one of DCI or timing advance for a first serving cell or the first identifier; and the first field of the first signaling depends on the configuration information of the first candidate cell.

[0013] As an embodiment, the problems to be solved by this application include: how to enhance the UE-based timing advance measurement process to improve the robustness of early synchronization of LTM.

[0014] As an embodiment, the problems to be solved by this application include: how to design an activation and deactivation mechanism for UE-based timing advance measurement.

[0015] As an embodiment, the problems to be solved by this application include: how to design a triggering mechanism for UE-based timing advance measurement.

[0016] As an embodiment, the problems to be solved by this application include: how to design a UE-based timing advance measurement mechanism to be applicable to conditional mobility; the conditional mobility includes conditional LTM or CHO or CPC.

[0017] As an embodiment, the problems to be solved by this application include: how to design a UE-based timing advance measurement mechanism to be applicable to continuous handover; the continuous handover includes continuous conditional LTM or SCPAC.

[0018] As an embodiment, the problems to be solved by this application include: how to design a TA maintenance mechanism for UE-based timing advance measurement to improve the effectiveness and accuracy of the TA of the candidate cell.

[0019] As an embodiment, the characteristics of the above method include: the first signaling is the signaling of the protocol layer below the RRC sublayer.

[0020] As an embodiment, the characteristics of the above method include: the execution of the UE-based timing advance measurement for the first candidate cell depends on at least the former of the first domain and the first timer of the first signaling.

[0021] As an embodiment, the advantages of the above method include: facilitating the activation or triggering of UE-based timing advance measurement.

[0022] As an embodiment, the advantages of the above method include: facilitating the UE to maintain the validity of the TA of the candidate cell obtained in the UE-based timing advance measurement.

[0023] As an embodiment, the advantages of the above method include: facilitating the UE to maintain the validity of the downlink reception timing difference between the serving cell and the candidate cell obtained in the UE-based timing advance measurement, thereby improving the robustness of the handover process.

[0024] As an embodiment, the advantages of the above method include: facilitating the improvement of the accuracy and validity of the TA of the candidate cell.

[0025] As an embodiment, the advantages of the above method include: facilitating the reduction of signaling interaction.

[0026] As an embodiment, the advantages of the above method include: using low-layer signaling to trigger UE-based timing advance measurement, reducing the latency of the triggering process, and improving the flexibility of the UE-based timing advance measurement process.

[0027] 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.

[0028] As an embodiment, the advantages of the above method include: facilitating the determination of the validity of the TA of the candidate cell obtained by the UE-based timing advance measurement.

[0029] As an embodiment, the advantages of the above method include: facilitating the improvement of the accuracy of the TA of the candidate cell.

[0030] As an embodiment, the advantages of the above method include: facilitating the improvement of the robustness of the handover process.

[0031] 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 second timer not being running; the second timer controls whether the uplink of the first candidate cell is synchronized.

[0032] As an embodiment, the advantages of the above method include: being beneficial to maintaining the TA of the candidate cell obtained by the UE-based timing advance measurement.

[0033] As an embodiment, the advantages of the above method include: being beneficial to reducing the impact of frequent measurements on the downlink reception of the serving cell.

[0034] 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.

[0035] As an embodiment, the advantages of the above method include: being beneficial to reducing the modification to the existing protocol and achieving simplicity.

[0036] 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; the first signaling includes the timing advance for the first serving cell.

[0037] As an embodiment, the advantages of the above method include: by activating the configuration in advance, reducing the payload in the first signaling and making the triggering of the UE-based timing advance measurement more flexible.

[0038] As an embodiment, the advantages of the above method include: being beneficial to reducing the signaling interaction overhead.

[0039] 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 for the first candidate cell depends on the first time interval.

[0040] As an embodiment, the advantages 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 and improving the accuracy of the candidate cell TA.

[0041] As an embodiment, the advantages of the above method include: expanding the application scenario of the UE-based timing advance measurement to make it applicable to the LTM handover between non-synchronous cells.

[0042] As an example, the advantages of the above method include: facilitating the early synchronization process of inter-CU LTM by adopting UE-based timing advance measurement.

[0043] According to one aspect of the present application, it is characterized in that the first domain of the first signaling indicates to perform 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 domain, and the Frequency domain resource assignment domain is set to all 1s.

[0044] As an example, the advantages of the above method include: facilitating the use of the existing DCI format to trigger the UE-based timing advance measurement.

[0045] As an example, the advantages of the above method include: facilitating the use of the existing PDCCH Order to trigger the UE-based timing advance measurement.

[0046] As an example, the advantages of the above method include: reducing the modification to the protocol and being easy to implement.

[0047] The present application discloses a method in a second node for wireless communication, which is characterized by including:

[0048] Sending a first RRC message, the first RRC message includes configuration information of a first candidate cell, and 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 a first signaling, the first signaling is 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;

[0049] Wherein, performing the UE-based timing advance measurement for the first candidate cell depends on at least the former of the first domain of the first signaling and a first timer, 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 domain of the first signaling depends on the configuration information of the first candidate cell.

[0050] According to one aspect of the present application, it is characterized in that 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.

[0051] According to one aspect of the present application, it is characterized in that the UE-based timing advance measurement for the first candidate cell depends on the second timer not being running; the second timer controls whether the uplink of the first candidate cell is synchronized.

[0052] According to one aspect of the present application, it is characterized in that 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.

[0053] According to one aspect of the present application, it is characterized in that 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.

[0054] 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 for the first candidate cell depends on the first time interval.

[0055] According to one aspect of the present application, it is characterized in that the first field of the first signaling indicates to perform 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 one Frequency domain resource assignment field is set to all 1s.

[0056] The present application discloses a first node for use in wireless communication, which is characterized by including:

[0057] A first processor, which 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;

[0058] 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 domain of the first signaling and the first timer, and the first timer indicates whether the uplink is synchronized; the first signaling includes at least one of DCI, the timing advance for the first serving cell, or the first identifier; the first domain of the first signaling depends on the configuration information of the first candidate cell.

[0059] This application discloses a second node used for wireless communication, which is characterized by including:

[0060] A second processor, which sends a first RRC message, the first RRC message includes the configuration information of the first candidate cell, and 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; sends a first signaling, and the first signaling is 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;

[0061] 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 domain of the first signaling and the first timer, and the first timer indicates whether the uplink is synchronized; the first signaling includes at least one of DCI, the timing advance for the first serving cell, or the first identifier; the first domain of the first signaling depends on the configuration information of the first candidate cell.

[0062] As an embodiment, compared with the traditional solution, this application has the following advantages:

[0063] -. Facilitate the activation or triggering of UE-based timing advance measurement;

[0064] -. Use low-layer signaling to trigger UE-based timing advance measurement, reduce the delay of the triggering process, and improve the flexibility of the UE-based timing advance measurement process;

[0065] -. Facilitate the UE to maintain the validity of the candidate cell TA obtained in the UE-based timing advance measurement;

[0066] -. Facilitate the expansion of the application scenario of UE-based timing advance measurement to make it applicable to LTM handover between asynchronous cells;

[0067] -. Facilitate reducing the payload in the first signaling by activating the configuration in advance, making the triggering of UE-based timing advance measurement more flexible;

[0068] - It is beneficial to realize using the existing DCI format to trigger UE-based timing advance measurement;

[0069] - It is beneficial to reduce the impact of frequent measurements on the downlink reception of the serving cell;

[0070] - It is beneficial to reduce the modification to the existing protocol and achieve simplicity;

[0071] - It is beneficial to improve the accuracy of the TA of the candidate cell;

[0072] - It is beneficial to improve the robustness of the handover process;

[0073] - It is beneficial to reduce signaling interaction; Description of the Drawings

[0074] By reading the following detailed description of the non-limiting embodiments with reference to the accompanying drawings, other features, objects, and advantages of the present application will become more apparent:

[0075] Figure 1 Shows a flowchart of triggering UE-based timing advance measurement according to an embodiment of the present application;

[0076] Figure 2 Shows a schematic diagram of a network architecture according to an embodiment of the present application;

[0077] Figure 3 Shows a schematic diagram of an embodiment of the radio protocol architecture of the user plane and the control plane according to an embodiment of the present application;

[0078] Figure 4 Shows a schematic diagram of a first communication device and a second communication device according to an embodiment of the present application;

[0079] Figure 5 Shows a flowchart of wireless signal transmission according to an embodiment of the present application;

[0080] Figure 6 Shows a schematic diagram of performing UE-based timing advance measurement for a first candidate cell depending on the first timer being running;

[0081] Figure 7 Shows a schematic diagram of performing UE-based timing advance measurement for a first candidate cell depending on the second timer not being running;

[0082] Figure 8 Shows a schematic diagram of performing UE-based timing advance measurement for a first candidate cell depending on the first timer not being running;

[0083] Figure 9 It shows a schematic diagram of performing UE-based timing advance measurement for a first candidate cell, where the UE-based timing advance measurement for the first candidate cell is activated;

[0084] Figure 10 It shows a schematic diagram of a first signaling indicating a first time interval according to an embodiment of the present application;

[0085] Figure 11 It shows a schematic diagram of the format of a first signaling according to an embodiment of the present application;

[0086] Figure 12 It shows a structural block diagram of a processing device in a first node according to an embodiment of the present application;

[0087] Figure 13 It shows a structural block diagram of a processing device in a second node according to an embodiment of the present application.

[0088] Figure 14 It shows a schematic diagram of a first signaling format according to an embodiment of the present application. Detailed implementation manners

[0089] The technical solutions of the present application will be further described in detail below with reference to the accompanying drawings. It should be noted that, without conflict, the embodiments and features in the embodiments of the present application can be combined arbitrarily with each other.

[0090] Example 1

[0091] Embodiment 1 exemplifies a flowchart of triggering UE-based timing advance measurement according to an embodiment of the present application, as shown in the accompanying Figure 1 drawing. In the accompanying Figure 1 drawing, each block represents a step. It should be emphasized that the order of the blocks in the drawing does not represent the chronological order of the steps represented.

[0092] In Embodiment 1, in step 101, a first node in the present application receives a first RRC message, where the first RRC message includes configuration information of a first candidate cell, and the configuration information of the first candidate cell indicates a first identifier of the first candidate cell and UE-based timing advance measurement for the first candidate cell; in step 102, it receives a first signaling, where the first signaling is a signaling of a protocol layer below the RRC sublayer; in step 103, it performs the UE-based timing advance measurement for the first candidate cell;

[0093] Among them, the UE-based timing advance measurement for the first candidate cell depends on at least the former of the first domain of the first signaling and the first timer, and the first timer indicates whether the uplink is synchronized; the first signaling includes at least one of DCI, timing advance for the first serving cell, or the first identifier; the first domain of the first signaling depends on the configuration information of the first candidate cell.

[0094] As an embodiment, the first RRC message is an RRCReconfiguration message.

[0095] As an embodiment, the first RRC message configures the LTM candidate cell configuration of the first serving cell.

[0096] As an embodiment, the first candidate cell refers to an LTM candidate cell.

[0097] As an embodiment, the LTM-Candidate field in the first RRC message carries the configuration information of the first candidate cell.

[0098] As an embodiment, the configuration information of the first candidate cell configures the first identifier of the first candidate cell.

[0099] As an embodiment, the configuration information of the first candidate cell configures the UE-based timing advance measurement for the first candidate cell.

[0100] As an embodiment, the first identifier is an ltm-UE-MeasuredTA-ID.

[0101] As an embodiment, the first identifier is an ltm-UE-MeasuredTA-ID-r18.

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

[0103] As an embodiment, the first identifier is an LTM-CandidateId.

[0104] As an embodiment, the first identifier is an LTM-CandidateId-r18.

[0105] As an embodiment, the first identifier is an integer.

[0106] As an embodiment, the first identifier is a non-negative integer.

[0107] As an example, the first identifier indicates the first candidate cell.

[0108] As an example, the first identifier indicates the first candidate cell from all the LTM candidate cells of the first node.

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

[0110] As an example, the UE-based timing advance measurement refers to the UE-based uplink timing advance measurement for the early uplink synchronization of LTM to a candidate cell.

[0111] As an example, the LTM is conditional LTM.

[0112] As an example, the LTM is continuous LTM.

[0113] As an example, the LTM is continuous conditional LTM.

[0114] As an example, the LTM is Conditional L1 / L2 Triggered Mobility.

[0115] As an example, the LTM is Cond-LTM.

[0116] As an example, the LTM is CondLTM.

[0117] As an example, the LTM is C-LTM.

[0118] As an example, the LTM is CLTM.

[0119] As an example, the LTM is Subsequent L1 / L2 Triggered Mobility.

[0120] As an example, the LTM is Subsequent-LTM.

[0121] As an example, the LTM is S-LTM.

[0122] As an example, the LTM is SLTM.

[0123] As an example, the LTM is Subsequent Conditional L1 / L2 Triggered Mobility.

[0124] As an example, the LTM is Subsequent-Cond-LTM.

[0125] As an example, the LTM is Subsequent-C-LTM.

[0126] As an example, the LTM is S-C-LTM.

[0127] As an example, the LTM is SCLTM.

[0128] As an example, the UE-based timing advance measurement means that the UE measures the timing advance.

[0129] As an example, the UE-based timing advance measurement means that the timing advance is determined based on the UE measurement.

[0130] As an example, the UE-based timing advance measurement includes: the process by which the UE derives the timing advance amount applied to the first uplink transmission to the first candidate cell.

[0131] As an example, the UE-based timing advance measurement includes: the UE performs a first measurement process.

[0132] As an example, the first measurement process is an L3 measurement.

[0133] As an example, the first measurement process is an L1 measurement.

[0134] As an example, the first measurement process includes an L3 measurement.

[0135] As an example, the first measurement process includes an L1 measurement.

[0136] As an example, the first measurement process is an RSTD measurement.

[0137] As an example, the first measurement process is an SSB-based measurement.

[0138] As an example, the first measurement process is a PRS-based measurement.

[0139] As an example, the first measurement process means: measuring the downlink reception timing difference between the first serving cell and the first candidate cell.

[0140] As an example, the UE-based timing advance measurement includes: the UE performs a first derivation process.

[0141] As an embodiment, the first derivation process refers to the 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, the valid uplink timing of the first candidate cell, and the downlink transmission timing difference between the first serving cell and the first candidate cell.

[0142] As an embodiment, the UE-based timing advance measurement includes performing the first derivation process.

[0143] As a sub-embodiment of the above embodiment, the first derivation process is: the uplink timing of the first candidate cell = the uplink timing of the first serving cell + 2 × downlink reception timing difference.

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

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

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

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

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

[0149] As a sub-embodiment of the above embodiment, the first time interval is the downlink reception and transmission timing difference.

[0150] As a sub-embodiment of the above embodiment, the downlink reception timing difference refers to the downlink reception timing difference of the first candidate cell relative to the first serving cell.

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

[0152] As a sub - embodiment of the above - mentioned embodiment, the downlink reception timing difference refers to: the downlink reception timing difference of the first serving cell relative to the first candidate cell.

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

[0154] As an embodiment, the UE - based timing advance measurement is implemented based on the UE.

[0155] As an embodiment, the UE - based timing advance measurement is based on the 3GPP protocol.

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

[0157] As an embodiment, the first measurement process is implemented based on the UE.

[0158] As an embodiment, the first derivation process is based on the 3GPP protocol.

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

[0160] As an embodiment, the first derivation process is implemented based on the UE.

[0161] As an embodiment, the first signaling is a DCI.

[0162] As an embodiment, the first signaling is a format 1_0 DCI.

[0163] As an embodiment, the first signaling is a MAC CE.

[0164] As an embodiment, the MAC CE is an LTM cell handover command MAC CE.

[0165] As an embodiment, the MAC CE is an LTM Cell Switch Command MAC CE.

[0166] As an embodiment, the MAC CE is a candidate cell TCI state activation / deactivation MAC CE.

[0167] As an embodiment, the MAC CE is a Candidate Cell TCI States Activation / Deactivation MAC CE.

[0168] As an embodiment, the first signaling includes a timing advance command.

[0169] As a sub - embodiment of the above - mentioned embodiment, the timing advance command is a Timing Advance Command field.

[0170] As a sub - embodiment of the above - mentioned embodiment, the timing advance command is the timing advance for the first serving cell.

[0171] As a subsidiary embodiment of the above - mentioned sub - embodiment, the first signaling is a Timing Advance Command MAC CE.

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

[0173] As a subsidiary embodiment of the above - mentioned sub - embodiment, the first signaling is a Random Access Response.

[0174] As a subsidiary embodiment of the above - mentioned sub - embodiment, the first signaling is a MAC RAR.

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

[0176] As a sub - embodiment of the above - mentioned embodiment, the timing advance command is the timing advance for the first candidate cell.

[0177] As a sub - embodiment of the above - mentioned embodiment, the first signaling is an LTM Cell Switch Command MAC CE.

[0178] As a sub - embodiment of the above - mentioned embodiment, the first signaling includes the timing advance command and the first identifier.

[0179] As an embodiment, the first field of the first signaling indicates to perform the UE - based timing advance measurement for the first candidate cell.

[0180] 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.

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

[0182] As an example, when the first field of the first signaling includes the timing advance for the first serving cell, perform the UE-based timing advance measurement for the first candidate cell.

[0183] As an example, the first signaling includes a bit, and the bit is set to 1; the bit being set to 1 indicates to perform or activate the UE-based timing advance measurement for the first candidate cell.

[0184] As an example, if the bit is set to 0, it indicates not to perform or deactivate the UE-based timing advance measurement for the first candidate cell.

[0185] As an example, the first signaling contains a timing advance command; the first field of the first signaling indicates whether the timing advance command in the first signaling is for the first serving cell or the first candidate cell.

[0186] As a sub-example of the above example, when the first field in the first signaling indicates that the timing advance command in the first signaling is for the first serving cell, trigger the UE-based timing advance measurement for the first candidate cell.

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

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

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

[0190] As an example, the first field of the first signaling indicates that the first signaling includes the timing advance for the first serving cell; the first signaling including the timing advance for the first serving cell instructs to perform the UE-based timing advance measurement for the first candidate cell.

[0191] As an example, the first field of the first signaling indicates that the first signaling includes the timing advance for the first serving cell; the first signaling including the timing advance for the first serving cell instructs to activate the UE-based timing advance measurement for the first candidate cell.

[0192] As an example, 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 including the timing advance for the first candidate cell instructs to stop the UE-based timing advance measurement for the first candidate cell.

[0193] As an example, if the first field of the first signaling indicates that the first signaling includes the timing advance for the first candidate cell, deactivate the UE-based timing advance measurement for the first candidate cell; the first signaling including the timing advance for the first candidate cell instructs to deactivate the UE-based timing advance measurement for the first candidate cell.

[0194] As an example, the first field is 1 bit.

[0195] As a sub-example of the above example, when the value of the first field is 1, the first signaling includes the timing advance for the first serving cell; when the value of the first field is 0, the first signaling does not include the timing advance for the first serving cell.

[0196] As a sub-example of the above example, 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.

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

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

[0199] As an embodiment, the first field is multiple bits; when the value of the first field is a first value, the first signaling includes the timing advance for the first serving cell; when the value of the first field is a second value, the first signaling does not include the timing advance for the first serving cell; the first value and the second value are different.

[0200] As an embodiment, the first field is 2 bits.

[0201] As a sub - embodiment of the above - mentioned embodiment, the first field indicates at least a first state, a second state, and a third state.

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

[0203] As a sub - embodiment of the above - mentioned embodiment, when the first field indicates the first state, the first signaling includes the timing advance for the first candidate cell.

[0204] As an accessory embodiment of the above - mentioned sub - embodiment, the timing advance of the first candidate cell is 12 bits.

[0205] As a sub - embodiment of the above - mentioned embodiment, when the first field indicates the second state, the first signaling includes the timing advance for the first serving cell.

[0206] As an accessory embodiment of the above - mentioned sub - embodiment, the timing advance of the first serving cell is 8 bits.

[0207] As an accessory embodiment of the above - mentioned sub - embodiment, the timing advance of the first serving cell is 6 bits.

[0208] As an accessory embodiment of the above - mentioned 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.

[0209] As an accessory embodiment of the above - mentioned sub - embodiment, the timing advance of the first serving cell is 12 bits.

[0210] As a sub - embodiment of the above - mentioned embodiment, when the first field indicates the third state, the first signaling does not include the timing advance for the first candidate cell.

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

[0212] As a sub - embodiment of the above - mentioned embodiment, when the first field 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.

[0213] As a sub - embodiment of the above - mentioned embodiment, when the first field indicates the fourth state, it is indicated that the timing advance field in the first signaling is reserved.

[0214] As a sub - embodiment of the above - mentioned embodiment, when the first field 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.

[0215] As a sub - embodiment of the above - mentioned embodiment, among the 2 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.

[0216] As a sub - embodiment of the above - mentioned 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 field respectively indicate the timing advances corresponding to the two PTAGs.

[0217] As a sub - embodiment of the above - mentioned embodiment, when the first serving cell is the PCell of the first node and the first node is configured with one PTAG (primary TAG), the first state in the first field indicates the timing advance corresponding to the one PTAG, and the second state in the first field indicates that the timing advance field in the first signaling is reserved.

[0218] As a sub - embodiment of the above - mentioned embodiment, when the two bits in the first field are 00, the first field indicates the first state; when the two bits in the first field are 01, the first field indicates the second state; when the two bits in the first field are 10, the first field indicates the third state; when the two bits in the first field are 11, the first field indicates the fourth state.

[0219] As a sub - embodiment of the above - mentioned embodiment, when the indications of two bits in the first domain are in 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; the fourth state is one of 00, 01, 10, and 11; and the values of the two bits in the first domain corresponding to any two of the first state, the second state, the third state, and the fourth state are different.

[0220] 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 for the UE - based timing advance.

[0221] As a sub - embodiment of the above - mentioned 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 one TAG - ID field is used for the UE - based timing advance measurement for the first candidate cell.

[0222] As a sub - embodiment of the above - mentioned embodiment, when the one 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.

[0223] As an embodiment, the first domain is 12 bits.

[0224] As an embodiment, when the value of the first domain is less than or equal to 3846, the first signaling includes the timing advance for the first candidate cell.

[0225] As a sub - embodiment of the above - mentioned 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 composed of 12 bits of the first domain.

[0226] As a sub - embodiment of the above - mentioned embodiment, the value range of the index value of the timing advance for the first candidate cell included in the first signaling is (0, 1, 2…3846).

[0227] As an embodiment, when the value in the first domain is greater than 3846, the first signaling includes the timing advance for the first serving cell.

[0228] As a sub - embodiment of the above - mentioned embodiment, the timing advance for the first serving cell included in the first signaling is the timing advance adjustment amount of the PTAG of the first serving cell indicated by a Timing Advance Command field composed of 6 bits.

[0229] As a sub - embodiment of the above - mentioned embodiment, the timing advance for the first serving cell included in the first signaling is the timing advance adjustment amount indicated by a Timing Advance Command field composed of the last 6 bits among the 12 bits of the first field.

[0230] As a sub - embodiment of the above - mentioned embodiment, the timing advance for the first serving cell included in the first signaling is the timing advance adjustment amount indicated by a Timing Advance Command MAC CE composed of the last 8 bits among the 12 bits of the first field.

[0231] As an accessory embodiment of the above - mentioned sub - embodiment, ignoring the TAG Identity field composed of the first 2 bits in the Timing Advance Command MAC CE composed of the last 8 bits among the 12 bits of the first field, it is considered that the Timing Advance Command field composed of the last 6 bits in the Timing Advance Command MAC CE indicates the timing advance adjustment amount of the PTAG of the first serving cell.

[0232] As a sub - embodiment of the above - mentioned embodiment, the value range of the index value of the timing advance for the first serving cell included in the first signaling is (0, 1, 2…63).

[0233] As an embodiment, the first signaling includes the timing advance for the first serving cell and the first identifier; the first field is a Timing Advance Command field; the first field occupies 12 bits.

[0234] As a sub - embodiment of the above - mentioned 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 for the first serving cell; setting the first 6 bits of the first field to 111110 indicates that the first signaling includes the timing advance for the first serving cell.

[0235] As a sub - embodiment of the above - mentioned 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 serving cell; the first 6 bits of the first field being set to 111101 indicates that the first signaling includes the timing advance for the first serving cell.

[0236] As a sub - embodiment of the above - mentioned embodiment, when the first field is set to all 1s, the first field does not indicate the timing advance of the first candidate cell.

[0237] As a sub - embodiment of the above - mentioned 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.

[0238] As a sub - embodiment of the above - mentioned embodiment, the first signaling is an LTM Cell SwitchCommand MAC CE.

[0239] As a sub - embodiment of the above - mentioned embodiment, the first signaling includes DCI.

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

[0241] As an embodiment, the bits in the first field are consecutive.

[0242] As an embodiment, the value of the first field being less than or equal to 3846 means that the 12 - bit binary bits in the first field are less than or equal to 3846.

[0243] As an embodiment, the value of the first field being greater than 3846 means that the 12 - bit binary bits in the first field are greater than 3846.

[0244] As an embodiment, the value of the first field being less than or equal to 3846 means that the value obtained by converting the 12 - bit binary bits in the first field to decimal is less than or equal to 3846.

[0245] As an embodiment, the value of the first field being greater than 3846 means that the value obtained by converting the 12 - bit binary bits in the first field to decimal is greater than 3846.

[0246] As a sub - embodiment of the above - mentioned embodiment, when the timing advance for the first serving cell included in the first signaling is such that the first 5 bits of the 12 bits of the first field are not all 1s, the Absolute Timing Advance Command MAC CE formed by the 12 bits of the first field indicates the timing advance for the first candidate cell.

[0247] As a sub - embodiment of the above - mentioned embodiment, when the first 6 bits of the 12 - bit first domain of the timing advance for the first serving cell included in the first signaling are not all 1s, the Absolute Timing Advance Command MAC CE formed by the 12 bits of the first domain indicates the timing advance for the first candidate cell.

[0248] As a sub - embodiment of the above - mentioned embodiment, when the first 5 bits of the 12 - bit first domain of the timing advance for the first serving cell included in the first signaling are all 1s, the Timing Advance Command domain formed by the last 6 bits of the 12 - bit first domain indicates the adjustment amount of the timing advance for the first serving cell.

[0249] As a sub - embodiment of the above - mentioned embodiment, when the first 5 bits of the 12 - bit first domain of the timing advance for the first serving cell included in the first signaling are all 1s, the Timing Advance Command domain formed by the 6 bits following the first 5 bits of the first domain indicates the adjustment amount of the timing advance for the first serving cell.

[0250] As a sub - embodiment of the above - mentioned embodiment, when the first 6 bits of the 12 - bit first domain of the timing advance for the first serving cell included in the first signaling are all 1s, the Timing Advance Command domain formed by the last 6 bits of the 12 - bit first domain indicates the adjustment amount of the timing advance for the first serving cell.

[0251] As an embodiment, the length of the first timer is pre - configured.

[0252] As an embodiment, the first timer is configured by the first RRC message.

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

[0254] As an embodiment, the first timer has a default value.

[0255] As an embodiment, the first timer is a timeAlignmentTimer.

[0256] As an embodiment, the name of the first timer includes timeAlignmentTimer.

[0257] As an embodiment, the uplink refers to the uplink between the first node and the first serving cell.

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

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

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

[0261] As an example, the first serving cell is the PCell of the first node.

[0262] As an example, the first serving cell is the sPCell of the first node.

[0263] As an example, the first serving cell is the PSCell of the first node.

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

[0265] As an example, the UE-based timing advance measurement for the first candidate cell that depends on the first domain of the first signaling includes the timing advance for the first serving cell.

[0266] As an example, the UE-based timing advance measurement for the first candidate cell that depends on the first domain of the first signaling includes the timing advance for the first serving cell and the first timer is not running.

[0267] As an example, the UE-based timing advance measurement for the first candidate cell that depends on the first domain of the first signaling includes the timing advance for the first serving cell and the first timer is running.

[0268] As an example, 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.

[0269] As an example, the first time interval is the downlink transmission timing difference of the first candidate cell relative to the first serving cell.

[0270] As an example, 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.

[0271] As an example, when the first time interval is not indicated in both the configuration information of the first candidate cell and the first signaling, the first time interval is considered to be 0.

[0272] As an example, when the first time interval is not indicated in both the configuration information of the first candidate cell and the first signaling, the first time interval is ignored.

[0273] As an example, when the first time interval is not indicated in both the configuration information of the first candidate cell and the first signaling, it is considered that the downlink transmissions of the first candidate cell and the first serving cell are synchronized.

[0274] As an example, in response to receiving the first RRC message, the UE-based TA measurement for the first candidate cell is performed.

[0275] As an example, in response to receiving the first RRC message, the UE-based TA measurement for the first candidate cell is activated.

[0276] As an example, in response to receiving the first RRC message, the UE-based TA measurement for the first candidate cell is not performed.

[0277] As an example, within at least a time interval before the first signaling is received, the UE-based TA measurement for the first candidate cell is not being performed.

[0278] As an example, performing 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.

[0279] As an example, the lower layer is the physical layer.

[0280] As an example, that the first domain of the first signaling depends on the configuration information of the first candidate cell means that the interpretation of the first signaling depends on the configuration information of the first candidate cell.

[0281] As an example, 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 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 field of the first signaling does not include the timing advance of the first serving cell.

[0282] As an example, 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.

[0283] As a sub-example of the above example, when the configuration information of at least the first candidate cell indicates UE-based timing advance measurement for the first candidate cell, setting the first field of the first signaling to 1 indicates activation of UE-based timing advance measurement for the first candidate cell; setting the first field of the first signaling to 0 indicates deactivation of UE-based timing advance measurement for the first candidate cell.

[0284] As an example, 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.

[0285] As an example, the first field of the first signaling depending on the configuration information of the first candidate cell means that the first signaling includes the first field depending on the configuration information of the first candidate cell.

[0286] As an example, 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 field; 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 field.

[0287] As an example, the first identifier of the first signaling depends on the first RRC message.

[0288] Example 2

[0289] Example 2 illustrates a schematic diagram of a network architecture according to an embodiment of the present application, as shown in the appendix Figure 2 shown. The appendix Figure 2Describes the 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 5GS (5G System) / EPS (Evolved Packet System) 200 or some other suitable term. The 5GS / EPS 200 includes at least one of a UE (User Equipment) 201, a RAN (Radio Access Network) 202, a 5GC (5G Core Network) / EPC (Evolved Packet Core) 210, an HSS (Home Subscriber Server) / UDM (Unified Data Management) 220, and an Internet service 230. The 5GS / EPS may be interconnected with other access networks, but these entities / interfaces are not shown for simplicity. As shown, the 5GS / EPS provides packet-switched services. However, those skilled in the art will readily understand that the various concepts presented throughout this application can be extended to networks that provide circuit-switched services or other cellular networks. The RAN includes a node 203 and other nodes 204. The node 203 provides user and control plane protocol termination towards the UE 201. The node 203 may be connected to other nodes 204 via an Xn interface (e.g., backhaul) / X2 interface. The node 203 may also be referred to as a base station, a base transceiver station, a radio base station, a radio transceiver, a transceiver function, a basic service set (BSS), an extended service set (ESS), a TRP (Transmitting and Receiving Point), or some other suitable term. The node 203 provides an access point to the 5GC / EPC 210 for the UE 201. Examples of the UE 201 include cellular phones, smartphones, Session Initiation Protocol (SIP) phones, laptop computers, personal digital assistants (PDAs), satellite radios, non-terrestrial base station communications, satellite mobile communications, global positioning systems, multimedia devices, video devices, digital audio players (e.g., MP3 players), cameras, game consoles, drones, aircraft, narrowband Internet of Things devices, machine-type communication devices, land vehicles, automobiles, wearable devices, or any other similar functional device. Those skilled in the art may also refer to the UE 201 as a mobile station, a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communication device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handset, a user agent, a mobile client, a client, or some other suitable term.Node 203 is connected to 5GC / EPC 210 via the S1 / NG interface. 5GC / EPC 210 includes MME (Mobility Management Entity) / AMF (Authentication Management Field) / SMF (Session Management Function) 211, other MME / AMF / SMF 214, S-GW (Service Gateway) / UPF (User Plane Function) 212, and P-GW (Packet Date Network Gateway) / UPF 213. MME / AMF / SMF 211 is a control node that processes the signaling between UE 201 and 5GC / EPC 210. Generally, MME / AMF / SMF 211 provides bearer and connection management. All user IP (Internet Protocal) packets are transmitted through S-GW / UPF 212, and S-GW / UPF 212 itself is connected to P-GW / UPF 213. P-GW provides UE IP address allocation and other functions. P-GW / UPF 213 is connected to the Internet service 230. The Internet service 230 includes the operator-corresponding Internet protocol services, specifically including the Internet, intranet, IMS (IP Multimedia Subsystem), and packet-switched streaming services.

[0290] As an embodiment, the UE 201 corresponds to the first node in the present application.

[0291] As an embodiment, the UE 201 is a user equipment (UE).

[0292] As an embodiment, the UE 201 is a base station (BS) device.

[0293] As an embodiment, the UE 201 is a relay device.

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

[0295] As an embodiment, the node 203 corresponds to the second node in the present application.

[0296] As an embodiment, the node 203 is a base station device.

[0297] As an embodiment, the node 203 is a user equipment.

[0298] As an embodiment, the node 203 is a relay device.

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

[0300] Typically, the UE 201 is a user equipment, and the node 203 is a base station equipment.

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

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

[0303] As an embodiment, the user equipment supports the transmission of a Non-Terrestrial Network (NTN).

[0304] As an embodiment, the user equipment supports the transmission of a Terrestrial Network.

[0305] As an embodiment, the user equipment supports Dual Connection (DC) transmission.

[0306] As an embodiment, the user equipment includes an aircraft.

[0307] As an embodiment, the user equipment includes a vehicle-mounted terminal.

[0308] As an embodiment, the user equipment includes a ship.

[0309] As an embodiment, the user equipment includes an Internet of Things (IoT) terminal.

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

[0311] As an embodiment, the user equipment includes a device that supports low-latency and high-reliability transmission.

[0312] As an embodiment, the user equipment includes a test device.

[0313] As an embodiment, the user equipment includes a signaling tester.

[0314] As an embodiment, the user equipment includes an IAB (Integrated Access and Backhaul)-MT (Mobile Termination).

[0315] As an embodiment, the base station equipment supports transmission in a non-terrestrial network.

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

[0317] As an embodiment, the base station equipment includes a Base Transceiver Station (BTS).

[0318] As an embodiment, the base station equipment includes a NodeB (NB).

[0319] As an embodiment, the base station equipment includes a gNB.

[0320] As an embodiment, the base station equipment includes an eNB.

[0321] As an embodiment, the base station equipment includes an ng-eNB.

[0322] As an embodiment, the base station equipment includes an en-gNB.

[0323] As an embodiment, the base station equipment includes a CU (Centralized Unit).

[0324] As an embodiment, the base station equipment includes a DU (Distributed Unit).

[0325] As an embodiment, the base station equipment includes a TRP (Transmitter Receiver Point).

[0326] As an embodiment, the base station equipment includes a macro cellular base station.

[0327] As an embodiment, the base station equipment includes a micro cell base station.

[0328] As an embodiment, the base station equipment includes a pico cell base station.

[0329] As an embodiment, the base station equipment includes a femtocell.

[0330] As an embodiment, the base station device includes a flying platform device.

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

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

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

[0334] As an embodiment, the base station device includes a gateway device.

[0335] As an embodiment, the base station device includes an IAB-node.

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

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

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

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

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

[0341] As an embodiment, the relay device includes a relay.

[0342] As an embodiment, the relay device includes an L3 relay.

[0343] As an embodiment, the relay device includes an L2 relay.

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

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

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

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

[0348] As an embodiment, the relay device includes a base station device.

[0349] Example 3

[0350] Embodiment 3 shows 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 the appendix Figure 3 as shown. Figure 3 It is a schematic diagram illustrating an embodiment of a radio protocol architecture for a user plane 350 and a control plane 300, Figure 3 showing the radio protocol architecture for the control plane 300 in 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 as PHY301 herein. Layer 2 (L2 layer) 305 is above PHY301 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 provides handover support. 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) in a cell. The MAC sublayer 302 is also responsible for HARQ operations. The RRC (Radio Resource Control) sublayer 306 in Layer 3 (L3 layer) 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 layer) and Layer 2 (L2 layer). In the user plane 350, the radio protocol architecture is generally the same as the corresponding layers and sublayers in the control plane 300 for 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, but the PDCP sublayer 354 also provides header compression for upper layer data packets to reduce radio transmission overhead. The L2 layer 355 in the user plane 350 also includes an SDAP (Service Data Adaptation Protocol) sublayer 356, and the SDAP sublayer 356 is responsible for mapping between QoS flows and data radio bearers (DRBs) to support service diversity.

[0351] As an example, the wireless protocol architecture in Figure 3 is applicable to the first node in this application.

[0352] As an example, the wireless protocol architecture in Figure 3 is applicable to the second node in this application.

[0353] As an example, the first RRC message in this application is generated by the RRC 306.

[0354] As an example, the first signaling in this application is generated by the RRC 306.

[0355] As an example, the first signaling in this application is generated by the MAC 302 or the MAC 352.

[0356] As an example, the first signaling in this application is generated by the PHY 301 or the PHY 351.

[0357] Example 4

[0358] Example 4 shows a schematic diagram of a first communication device and a second communication device according to this application, as shown in Figure 4 as shown. Figure 4 is a block diagram of a first communication device 450 and a second communication device 410 that communicate with each other in an access network.

[0359] The first communication device 450 includes a controller / processor 459, a memory 460, a data source 467, a transmitting processor 468, a receiving processor 456, a multi-antenna transmitting processor 457, a multi-antenna receiving processor 458, a transmitter / receiver 454, and an antenna 452.

[0360] The second communication device 410 includes a controller / processor 475, a memory 476, a receiving processor 470, a transmitting processor 416, a multi-antenna receiving processor 472, a multi-antenna transmitting processor 471, a transmitter / receiver 418, and an antenna 420.

[0361] In the transmission from the second communication device 410 to the first communication device 450, at the second communication device 410, upper layer data packets from the core network are provided to the controller / processor 475. The controller / processor 475 implements the functionality of the L2 layer. In the 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 for 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 encoding and interleaving to facilitate forward error correction (FEC) at the second communication device 410, and 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), M-quadrature amplitude modulation (M-QAM)). The multi-antenna transmit processor 471 performs digital spatial precoding on the encoded and modulated symbols, including codebook-based precoding and non-codebook-based precoding, and beamforming processing, to generate one or more spatial streams. The transmit processor 416 then maps each spatial stream to subcarriers, multiplexes with reference signals (e.g., pilots) in the time domain and / or frequency domain, and then uses the inverse fast Fourier transform (IFFT) to generate a physical channel carrying a time-domain multi-carrier symbol stream. Subsequently, the multi-antenna transmit processor 471 performs transmit analog precoding / beamforming operations on the time-domain multi-carrier 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 different antennas 420.

[0362] In the transmission from the second communication device 410 to the first communication device 450, at the first communication device 450, each receiver 454 receives signals via its corresponding antenna 452. Each receiver 454 recovers the information modulated onto the radio frequency carrier and converts the radio frequency stream into a baseband multi-carrier symbol stream and provides it to the receive processor 456. The receive processor 456 and the multi-antenna receive processor 458 perform various signal processing functions of the L1 layer. The multi-antenna receive processor 458 performs receive analog precoding / beamforming operations on the baseband multi-carrier symbol stream from the receivers 454. The receive processor 456 uses the fast Fourier transform (FFT) to convert the baseband multi-carrier symbol stream after the receive analog precoding / beamforming operations from the time domain to the frequency domain. In the frequency domain, the physical layer data signal and the reference signal are demultiplexed by the receive processor 456, where the reference signal will be used for channel estimation, and the data signal recovers any spatial streams destined for the first communication device 450 after multi-antenna detection in the multi-antenna receive processor 458. The symbols on each spatial stream are demodulated and recovered in the receive processor 456, and soft decisions are generated. Subsequently, the receive processor 456 decodes and de-interleaves the soft decisions to recover the upper layer data and control signals transmitted by the second communication device 410 on the physical channel. Subsequently, the upper layer data and control signals are provided to the controller / processor 459. The controller / processor 459 performs 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. In the 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, control signal processing to recover upper layer data packets from the core network. Subsequently, the upper layer data packets are provided to all protocol layers above the L2 layer. Various control signals may also be provided to the L3 for L3 processing.

[0363] In the transmission from the first communication device 450 to the second communication device 410, at the first communication device 450, the data source 467 is used 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 function described at the second communication device 410 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, and implements the L2 layer functions for the user plane and the 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 processing. The multi-antenna transmit processor 457 performs digital multi-antenna spatial precoding, including codebook-based precoding and non-codebook-based precoding, and beamforming processing. Subsequently, the transmit processor 468 modulates the generated spatial streams into multi-carrier / single-carrier symbol streams, and after the analog precoding / beamforming operation in the multi-antenna transmit processor 457, provides them 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 radio frequency symbol stream and then provides it to the antenna 452.

[0364] In the transmission from the first communication device 450 to the second communication device 410, the function at the second communication device 410 is similar to the receiving function described at the first communication device 450 in the transmission from the second communication device 410 to the first communication device 450. Each receiver 418 receives a radio frequency signal through its corresponding antenna 420, converts the received radio frequency signal into a baseband signal, and provides the baseband signal to the multi-antenna receive processor 472 and the receive processor 470. The receive processor 470 and the multi-antenna receive processor 472 jointly implement the L1 layer functions. The controller / processor 475 implements the L2 layer functions. The controller / processor 475 may be associated with a memory 476 that stores program code and data. The memory 476 may be referred to as a computer-readable medium. In the transmission from the first communication device 450 to the second communication device 410, the controller / processor 475 provides demultiplexing between transport and logical channels, packet reassembly, decryption, header decompression, and control signal processing to recover the upper layer data packets from the UE 450. The upper layer data packets from the controller / processor 475 may be provided to the core network.

[0365] As an example, 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 is at least 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 UE-based timing advance measurement for the first candidate cell; receive a first signaling, the first signaling being a signaling of a protocol layer below the RRC sublayer; perform the UE-based timing advance measurement for the first candidate cell; the performance of the UE-based timing advance measurement for the first candidate cell depends on at least the former of a first domain of the first signaling and a first timer, the first timer indicating whether the uplink is synchronized; the first signaling includes at least one of DCI or timing advance for a first serving cell or the first identifier; the first domain of the first signaling depends on the configuration information of the first candidate cell.

[0366] As an example, 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 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 performance of the UE-based timing advance measurement for the first candidate cell depends on at least the former of a first domain of the first signaling and a first timer, the first timer indicating whether the uplink is synchronized; the first signaling includes at least one of DCI or timing advance for a first serving cell or the first identifier; the first domain of the first signaling depends on the configuration information of the first candidate cell.

[0367] 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 with the at least one processor. The second communication device 410 is at least configured to: send 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 UE-based timing advance measurement for the first candidate cell; send a 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 performance of the UE-based timing advance measurement for the first candidate cell depends on at least the former of a first field of the first signaling and a first timer, the first timer indicating whether the uplink is synchronized; the first signaling includes at least one of DCI, timing advance for a 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: 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: 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 UE-based timing advance measurement for the first candidate cell; sending a 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 performance of the UE-based timing advance measurement for the first candidate cell depends on at least the former of a first field of the first signaling and a first timer, the first timer indicating whether the uplink is synchronized; the first signaling includes at least one of DCI, timing advance for a 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, 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.

[0370] As an embodiment, at least one of the antenna 420, the transmitter 418, the transmitting processor 416, and the controller / processor 475 is used to send the first RRC message.

[0371] As an example, at least one of the antenna 452, the receiver 454, the receive processor 456, and the controller / processor 459 is configured to receive the first signaling.

[0372] As an example, at least one of the antenna 420, the transmitter 418, the transmit processor 416, and the controller / processor 475 is configured to transmit the first signaling.

[0373] As an example, the first communication device 450 corresponds to the first node in the present application.

[0374] As an example, the second communication device 410 corresponds to the second node in the present application.

[0375] As an example, the first communication device 450 is a user equipment.

[0376] As an example, the first communication device 450 is a base station equipment.

[0377] As an example, the first communication device 450 is a relay device.

[0378] As an example, the second communication device 410 is a user equipment.

[0379] As an example, the second communication device 410 is a base station equipment.

[0380] As an example, the second communication device 410 is a relay device.

[0381] Example 5

[0382] Example 5 illustrates a wireless signal transmission flowchart according to an embodiment of the present application, as shown in the Figure 5 appendix. It should be noted that the order in this example does not limit the signal transmission order and the implementation order in the present application.

[0383] For First Node U01:

[0384] In step S5101, receive the first RRC message;

[0385] In step S5102, receive the first signaling;

[0386] In step S5103, perform the UE-based timing advance measurement for the first candidate cell;

[0387] For Second Node N02:

[0388] In step S5201, a first RRC message is sent.

[0389] In step S5202, a first signaling is sent.

[0390] In Embodiment 5, the first RRC message includes configuration information of a first candidate cell, and the configuration information of the first candidate cell indicates a first identifier of the first candidate cell and UE-based timing advance measurement for the first candidate cell; the first signaling is a signaling of a 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 a first field of the first signaling and a first timer, and the first timer indicates whether the uplink is synchronized; the first signaling includes at least one of DCI, or timing advance for a first serving cell, or the first identifier; the first field of the first signaling depends on the configuration information of the first candidate cell.

[0391] As an embodiment, there is a wireless connection between the first node U01 and the second node N02.

[0392] As an embodiment, there is a wired connection between the first node U01 and the second node N02.

[0393] As an embodiment, there is a Uu interface connection between the first node U01 and the second node N02.

[0394] As an embodiment, there is an IAB interface connection between the first node U01 and the second node N02.

[0395] As an embodiment, there is a PC5 interface connection between the first node U01 and the second node N02.

[0396] As an embodiment, in response to receiving the first signaling, the execution of the UE-based timing advance measurement for the first candidate cell is triggered.

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

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

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

[0400] As an example, the first condition is an evaluation condition for switching the condition LTM to the first candidate cell.

[0401] As an example, in response to the first condition being satisfied, perform LTM to the first candidate cell.

[0402] As an example, the first condition is configured by the condExecutionCond field in the first RRC message.

[0403] As an example, in response to sending an RRCReconfigurationComplete message, deactivate the UE-based timing advance measurement for the first candidate cell.

[0404] As an example, 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.

[0405] As an example, 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.

[0406] As an example, 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; the first signaling includes DCI.

[0407] As an example, 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; the first signaling includes the timing advance for the first serving cell.

[0408] As an example, 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; the first signaling includes the first identifier.

[0409] As an example, 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; the first signaling includes the first identifier and the TCI state.

[0410] As an example, 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; the first signaling includes DCI and the timing advance for the first serving cell.

[0411] As an example, the execution of the UE-based timing advance measurement for the first candidate cell depends on the first domain of the first signaling; the first signaling includes DCI; in response to receiving the DCI, the execution of the UE-based timing advance measurement for the first candidate cell is triggered.

[0412] As an example, the execution of the UE-based timing advance measurement for the first candidate cell depends on the first domain of the first signaling; the first signaling includes the timing advance for the first serving cell; in response to receiving the timing advance, the execution of the UE-based timing advance measurement for the first candidate cell is triggered.

[0413] As an example, the execution of the UE-based timing advance measurement for the first candidate cell depends on the first domain of the first signaling and the first timer; the first signaling includes DCI; when the first timer is running, in response to receiving the DCI, the execution of the UE-based timing advance measurement for the first candidate cell is triggered.

[0414] As an example, the execution of the UE-based timing advance measurement for the first candidate cell depends on the first domain of the first signaling and the first timer; the first signaling includes DCI; when the first timer is not running, in response to receiving the DCI, the execution of the UE-based timing advance measurement for the first candidate cell is triggered.

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

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

[0417] As an example, 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, in response to the expiration of the second timer, the UE-based timing advance measurement for the first candidate cell is triggered to be executed.

[0418] Example 6

[0419] Example 6 exemplifies a schematic diagram of the 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 the appendix Figure 6 as shown.

[0420] In Example 6, 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.

[0421] As an example, the UE-based timing advance measurement for the first candidate cell depends on the first domain of the first signaling and the first timer being running; the first domain of the first signaling indicates to execute or activate the UE-based timing advance measurement for the first candidate cell.

[0422] As an example, the first timer is a timeAlignmentTimer associated with the PTAG of the first serving cell.

[0423] As an example, the first timer controls whether the uplink of the first candidate cell is synchronized means that the first timer controls the time for the uplink synchronization of the first serving cell.

[0424] As an example, the first timer controls whether the uplink of the first candidate cell is synchronized means that when the first timer is running and not expired, it indicates that the uplink of the first serving cell is in a synchronized state.

[0425] As an example, the first timer controls whether the uplink of the first candidate cell is synchronized means that when the first timer is not running, it indicates that the uplink between the first node and the first serving cell is out of sync.

[0426] As an example, the UE-based timing advance measurement for the first candidate cell depends on the first timer being running means that only when the first timer is running can the UE-based timing advance measurement for the first candidate cell be executed.

[0427] As an example, 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 executed.

[0428] As an example, 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 of executing the UE-based timing advance measurement for the first candidate cell.

[0429] As an example, in response to the start or restart of the first timer, the UE-based timing advance measurement for the first candidate cell is executed.

[0430] As an example, in response to receiving the first signaling, the UE-based timing advance measurement for the first candidate cell is executed, and the first timer is started or restarted.

[0431] As a sub-example of the above example, the first signaling includes the one timing advance command.

[0432] As a sub-example of the above example, the one timing advance command is for the timing advance of the PTAG of the first serving cell.

[0433] As a sub-example of the above example, the first signaling includes a timing advance command MAC CE.

[0434] As a sub-example of the above example, the first signaling is a Random Access Response.

[0435] As an example, 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 executed, and the first timer is started or restarted.

[0436] As an example, when the first timer is running, in response to receiving the first signaling, the UE-based timing advance measurement for the first candidate cell is not executed.

[0437] As a sub-example of the above example, the non-execution of the UE-based timing advance measurement for the first candidate cell means that the first measurement process in the UE-based timing advance measurement is not executed.

[0438] As a sub - embodiment of the above - mentioned embodiment, the non - execution of the UE - based timing advance measurement for the first candidate cell means: not executing the first measurement process in the UE - based timing advance measurement and executing the first derivation process in the UE - based timing advance measurement.

[0439] As a sub - embodiment of the above - mentioned embodiment, in response to receiving the first signaling, start or restart the first timer.

[0440] Example 7

[0441] Embodiment 7 exemplifies a schematic diagram of performing UE - based timing advance measurement for a first candidate cell depending on that a second timer is not running, as shown in the appendix. Figure 7 as shown.

[0442] In Embodiment 7, the execution of the UE - based timing advance measurement for the first candidate cell depends on that the second timer is not running; the second timer controls whether the uplink of the first candidate cell is synchronized.

[0443] As an embodiment, the execution of the UE - based timing advance measurement for the first candidate cell depends on the first domain of the first signaling and that the second timer is not running; the first domain of the first signaling indicates to execute or activate the UE - based timing advance measurement for the first candidate cell.

[0444] As an embodiment, the execution of the UE - based timing advance measurement for the first candidate cell depends on the first domain of the first signaling, that the first timer is running and that the second timer is not running; the first domain of the first signaling indicates to execute or activate the UE - based timing advance measurement for the first candidate cell.

[0445] As an embodiment, the second timer is in the MAC sub - layer.

[0446] As an embodiment, the second timer is in the physical layer.

[0447] As an embodiment, that the second timer controls whether the uplink of the first candidate cell is synchronized means: the second timer controls the synchronization time of the uplink of the first candidate cell.

[0448] As an embodiment, that the second timer controls whether the uplink of the first candidate cell is synchronized means: the second timer controls whether the downlink reception timing difference between the first candidate cell and the first serving cell is valid.

[0449] 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.

[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 downlink reception timing difference between the first candidate cell and the first serving cell is valid.

[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 times out or is not running, the uplink timing of the first candidate cell fails.

[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 downlink reception timing difference between the first candidate cell and the first serving cell fails.

[0453] As an embodiment, the second timer is the timeAlignmentTimer associated with the uplink timing advance of the first candidate cell.

[0454] As an embodiment, the second timer is the timeAlignmentTimer associated with the downlink reception timing difference between the first candidate cell and the first serving cell.

[0455] 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.

[0456] As a sub-embodiment of the above embodiment, when the first timer is running, in response to the expiration of the second timer, trigger the execution of the UE-based timing advance measurement for the first candidate cell.

[0457] As a sub-embodiment of the above embodiment, when the first timer is running and the second timer is not running, in response to receiving the first signaling, trigger the execution of the UE-based timing advance measurement for the first candidate cell.

[0458] As an embodiment, in response to the first timer not being running, pause or reset the second timer.

[0459] As an example, in response to completing the UE-based timing advance measurement for the first candidate cell, start or restart the second timer.

[0460] As an example, in response to the uplink timing advance of the first candidate cell being updated, start or restart the second timer.

[0461] As a sub-example of the above example, the update refers to an update by the UE-based timing advance measurement process.

[0462] As a sub-example of the above example, the update refers to an update by at least the first measurement process in the UE-based timing advance measurement.

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

[0464] As a sub-example of the above example, the update refers to an update by the first measurement process in the UE-based timing advance measurement.

[0465] As a sub-example of the above example, the update refers to an update by the first derivation process in the UE-based timing advance measurement.

[0466] Example 8

[0467] Example 8 illustrates a schematic diagram of performing UE-based timing advance measurement for a first candidate cell depending on the first timer not being in operation, as shown in the appendix. Figure 8 as shown.

[0468] In Example 8, performing the UE-based timing advance measurement for the first candidate cell depends on the first timer not being in operation; the first timer controls whether the uplink of the first candidate cell is synchronized.

[0469] As an example, performing the UE-based timing advance measurement for the first candidate cell depends on the first domain of the first signaling and the first timer not being in operation; the first domain of the first signaling indicates to perform or activate the UE-based timing advance measurement for the first candidate cell.

[0470] As an example, the first timer is the timeAlignmentTimer that controls whether the uplink of the first candidate cell is synchronized.

[0471] As an example, the expiration of the first timer triggers the UE-based timing advance measurement for the first candidate cell.

[0472] As an example, in response to the expiration of the first timer, the UE-based timing advance measurement for the first candidate cell is performed.

[0473] As an example, in response to the completion of the UE-based timing advance measurement for the first candidate cell, the first timer is started or restarted.

[0474] As an example, 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 perform the UE-based timing advance measurement for the first candidate cell only when the first timer is not running.

[0475] As an example, 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.

[0476] As an example, 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 there is a valid uplink timing advance for the first serving cell, the first node can perform the UE-based timing advance measurement for the first candidate cell.

[0477] As an example, 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 there is a valid uplink timing advance for the first serving cell, the first signaling can trigger the UE-based timing advance measurement for the first candidate cell.

[0478] As an example, 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, regardless of whether there is a valid uplink timing advance for the first serving cell, the first node can perform the UE-based timing advance measurement for the first candidate cell.

[0479] As an example, the execution of the UE-based timing advance measurement for the first candidate cell depends on the first timer not being in operation, which means that when the first timer is in operation, when the first node has a valid uplink timing advance for the first serving cell, the first node may not execute 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 serving cell, the first node may execute the UE-based timing advance measurement for the first candidate cell.

[0480] As an example, the execution of the UE-based timing advance measurement for the first candidate cell depends on the first timer not being in operation, which means that when the first timer is in operation, when the first node has a valid uplink timing advance for the first serving cell, the first node may execute 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 serving cell, the first node may not execute the UE-based timing advance measurement for the first candidate cell.

[0481] As an example, that the first node may execute the UE-based timing advance measurement for the first candidate cell means that the first node may determine the opportunity to execute the UE-based timing advance measurement for the first candidate cell according to the UE implementation.

[0482] As an example, that the first node may execute the UE-based timing advance measurement for the first candidate cell means that the first node determines the opportunity to execute the UE-based timing advance measurement for the first candidate cell according to the signaling indication.

[0483] Example 9

[0484] Embodiment 9 exemplifies a schematic diagram of the execution of the UE-based timing advance measurement for the first candidate cell according to an embodiment of the present application, which depends on the UE-based timing advance measurement for the first candidate cell being activated, as shown in the appendix Figure 9 as follows.

[0485] In Embodiment 9, 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; the first signaling includes the timing advance for the first serving cell.

[0486] As an example, the UE-based timing advance amount for the first candidate cell is activated by the first RRC message.

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

[0488] As an embodiment, when the UE-based timing advance measurement for the first candidate cell is activated, in response to receiving the timing advance of the first serving cell, the UE-based timing advance measurement for the first candidate cell is triggered.

[0489] As an embodiment, when the UE-based timing advance measurement for the first candidate cell is not activated, in response to receiving the timing advance of the first serving cell in the first signaling, the UE-based timing advance measurement for the first candidate cell is not triggered.

[0490] As an embodiment, in 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.

[0491] As an embodiment, the activation of the UE-based timing advance measurement for the first candidate cell means that after the activation of the UE-based timing advance measurement for the first candidate cell, the first node is allowed to perform the UE-based timing advance measurement for the first candidate cell.

[0492] As an embodiment, the activation of the UE-based timing advance measurement for the first candidate cell includes: after the activation of the UE-based timing advance measurement for the first candidate cell, in response to receiving the first signaling, performing the UE-based timing advance measurement for the first candidate cell.

[0493] As an embodiment, the activation of the UE-based timing advance measurement for the first candidate cell includes: after the activation of 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 the UE implementation.

[0494] As an embodiment, the activation of the UE-based timing advance measurement for the first candidate cell means that after the activation of the UE-based timing advance measurement for the first candidate cell, configuring the UE-based timing advance measurement for the first candidate cell.

[0495] As a sub-embodiment of the above embodiment, the configuration is configured by the first RRC.

[0496] As a sub - embodiment of the above - mentioned embodiment, the configuration includes the period of the UE - based timing advance measurement.

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

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

[0499] As an embodiment, activating the UE - based timing advance measurement for the first candidate cell includes: in 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.

[0500] 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, activate the UE - based timing advance measurement for the first candidate cell.

[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, trigger the execution of the UE - based timing advance measurement for the first candidate cell.

[0502] As an embodiment, the first signaling includes a timing advance command, and the timing advance of the first serving cell or the first candidate cell is indicated by the first domain.

[0503] Example 10

[0504] Embodiment 10 exemplifies a schematic diagram in which the first signaling indicates a first time interval according to an embodiment of the present application, as shown in the appendix Figure 10 as follows.

[0505] 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.

[0506] As an embodiment, the first time interval is used for the UE - based timing advance measurement of the first candidate cell.

[0507] As an embodiment, the first time interval indicates the downlink transmission timing difference.

[0508] As an embodiment, the first time interval is the downlink transmission timing difference.

[0509] As an embodiment, the first time interval is the Timing Alignment Error (TAE) between the first candidate cell and the first serving cell.

[0510] As an embodiment, the first time interval is equal to a first integer multiplied by a first unit of time.

[0511] As an embodiment, the first unit of time is related to a first parameter set.

[0512] As an embodiment, the first parameter set is the parameter set of the cell with a larger subcarrier spacing among the first candidate cell and the first serving cell.

[0513] As an embodiment, the first parameter set is the parameter set of the cell with a smaller subcarrier spacing among the first candidate cell and the first serving cell.

[0514] As an embodiment, the first parameter set is the parameter set of the first candidate cell.

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

[0516] As an embodiment, the first unit of time is 16·64·T c / 2 μ 。

[0517] As an embodiment, the is the parameter corresponding to the first parameter set.

[0518] As an embodiment, the first unit of time is configurable.

[0519] As an embodiment, the first unit of time is configured by a first RRC message.

[0520] As an embodiment, the first unit of time is configured by a first signaling.

[0521] As an embodiment, the value range of the first integer is symmetric about 0.

[0522] As an embodiment, the first integer can be a positive number or a negative number.

[0523] 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.

[0524] As an embodiment, the first time interval = a second integer × a second unit of time + the first integer × the first unit of time.

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

[0526] As an example, the first offset is an integer multiple of the time slot length.

[0527] As an example, the second integer indicates the first offset.

[0528] As an example, the value range of the second integer is symmetric about 0.

[0529] As an example, the second integer can be a positive number or a negative number.

[0530] As an example, the value range of the second integer is related to the first parameter set.

[0531] As an example, when the subcarrier spacing of the first parameter set is 15 kHz, the value range of the second integer is [-2, 2].

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

[0533] As an example, when the subcarrier spacing of the first parameter set is 30 kHz, the value range of the second integer is [-5, 5].

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

[0535] As an example, when the subcarrier spacing of the first parameter set is 60 kHz, the value range of the second integer is [-10, 10].

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

[0537] As an example, when the subcarrier spacing of the first parameter set is 120 kHz, the value range of the second integer is [-20, 20].

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

[0539] As an example, the second unit time is equal to the length of a single time slot under the first parameter set.

[0540] As an example, the second unit time is equal to the length of a single time slot of the first candidate cell.

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

[0542] As an example, when the first time interval is positive, 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 advance is equal to the absolute value of the first time interval.

[0543] As an example, when the first time interval is negative, 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.

[0544] As an example, when the first time interval is positive, 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 advance is equal to the absolute value of the first time interval.

[0545] As an example, when the first time interval is negative, 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.

[0546] Example 11

[0547] Embodiment 11 exemplifies a schematic diagram of the format of the first signaling according to an embodiment of the present application, as shown in the appendix Figure 11 as shown.

[0548] In Embodiment 11, the first field of the first signaling indicates to perform 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.

[0549] As an example, the first field is 6 bits after the Frequency domain resource assignment field.

[0550] As an example, the first field is 7 bits after the Frequency domain resource assignment field.

[0551] As an example, the first field occupies one bit in the first signaling.

[0552] As an example, the first field is the 7th bit after the Frequency domain resource assignment field.

[0553] As an example, the first field is the UL / SUL indicator field in the first signaling.

[0554] As an example, the first identifier in the first signaling indicates the first candidate cell.

[0555] As an example, the first identifier is the Cell indicator field in the first signaling.

[0556] As an example, the first identifier is the ltm-UE-MeasuredTA-ID field in the first signaling.

[0557] As an example, the first identifier occupies multiple bits.

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

[0559] As an example, the value of C is the number of candidate cells configured for UE-based timing advance measurement.

[0560] As an example, the value of C is the number of configurable maximum LTM candidate cells.

[0561] As an example, the value of C is equal to 8.

[0562] As an example, the first identifier occupies 3 bits.

[0563] As an example, the first identifier occupies 4 bits.

[0564] As an example, the value of C depends on the first RRC signaling.

[0565] As an example, the first field occupies the first bit after the PRACH Mask index field in the first signaling.

[0566] As an example, the first field occupies the first bit after the PRACH retransmission indicator field in the first signaling.

[0567] As an example, the first field occupies 6 consecutive bits after the Frequency domain resource assignment field in the first signaling.

[0568] As an example, the first field occupies the first reserved bit in the first signaling.

[0569] As an example, in the first signaling, the first identifier is after the first field.

[0570] As an example, the first identifier occupies a consecutive number of bits immediately after the first field in the first signaling.

[0571] As an example, the first identifier occupies the first reserved bits after the first field in the first signaling.

[0572] As an example, the first identifier occupies a consecutive number of reserved bits after the first field in the first signaling.

[0573] As an example, the interpretation of the first signaling depends on the first RRC signaling.

[0574] As an example, the first field is 1 bit.

[0575] As an example, the first field of the first signaling indicates to perform the UE-based timing advance measurement or the early random access procedure for the first candidate cell.

[0576] As an example, when the value of the first field is 1, the first signaling indicates to perform the UE-based timing advance measurement for the first candidate cell.

[0577] As an example, when the value of the first field is 0, the first signaling does not indicate to perform the UE-based timing advance measurement for the first candidate cell.

[0578] As an example, when the value of the first field is 0, the first signaling indicates to perform the UE-based timing advance measurement for the first candidate cell.

[0579] As an example, when the value of the first field is 1, the first signaling does not indicate to perform the UE-based timing advance measurement for the first candidate cell.

[0580] As an embodiment, when the value of the first field is 0, the first signaling indicates to perform an early random access procedure for the first candidate cell.

[0581] As an embodiment, when the value of the first field is 1, the first signaling does not indicate to perform an early random access procedure for the first candidate cell.

[0582] As an embodiment, when the value of the first field is 1, the first signaling indicates to perform an early random access procedure for the first candidate cell.

[0583] As an embodiment, when the value of the first field is 0, the first signaling does not indicate to perform an early random access procedure for the first candidate cell.

[0584] As an embodiment, the first signaling includes configuration information required to perform the UE-based timing advance measurement procedure for the first candidate cell.

[0585] As a sub-embodiment of the above embodiment, the configuration information is after the first field.

[0586] As a sub-embodiment of the above embodiment, the configuration information includes the first identifier.

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

[0588] As a sub-embodiment of the above embodiment, the configuration information includes the first time interval.

[0589] As a sub-embodiment of the above embodiment, the configuration information includes the TAE between the first candidate cell and the first serving cell.

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

[0591] As a sub-embodiment of the above embodiment, the configuration information includes the SS / PBCH index of the first candidate cell.

[0592] As a sub-embodiment of the above embodiment, the configuration information includes the TCI state ID of the first candidate cell.

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

[0594] As an example, only when the Random Access Preamble index field in the first signaling is set to 0b000000, the first field of the first signaling indicates to perform 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.

[0595] As an example, the first field includes the one Random Access Preamble index field.

[0596] As an example, at least when the value of the one Random Access Preamble index field in the first signaling is equal to 0b000000, the first signaling indicates to perform the UE-based timing advance measurement for the first candidate cell; otherwise, the first signaling does not indicate to perform the UE-based timing advance measurement for the first candidate cell.

[0597] As an example, at least when the bits of the one Frequency domain resource assignment field in the first signaling are all 1, the value of the one Random Access Preamble index field is equal to 0b000000, and there is any non-zero bit after the one Random Access Preamble index field, the first signaling indicates to perform the UE-based timing advance measurement for the first candidate cell; otherwise, the first signaling does not indicate to perform the UE-based timing advance measurement for the first candidate cell.

[0598] As a sub-example of the above example, when the bits of the one Frequency domain resource assignment field in the first signaling are all 1, the value of the one Random Access Preamble index field is equal to 0b000000, and any bit after the one Random Access Preamble index field is 0, the first signaling indicates that the user performs CBRA on the first serving cell.

[0599] As a sub-example of the above example, the first field includes a Cell indicator field.

[0600] As a sub - embodiment of the above - mentioned embodiment, the one Cell indicator field indicates early uplink synchronization on a cell or indicates that a cell performs UE - based timing advance measurement or indicates contention - based random access (CBRA) on the first serving cell.

[0601] As a sub - embodiment of the above - mentioned embodiment, the occupancy of the one Cell indicator field is

[0602] As a sub - embodiment of the above - mentioned embodiment, X depends on whether the value of the one Random Access Preamble index is 0b000000.

[0603] As a subsidiary embodiment of the above - mentioned sub - embodiment, when the value of the one Random Access Preamble index is not 0b000000, X is the number of candidate cells configured with the high - layer parameter EarlyUlSyncConfig; when the value of the one Random Access Preamble index is not 0b000000 and the EarlyUlSyncConfig parameter is not configured, the one Cell indicator field is reserved.

[0604] As a subsidiary embodiment of the above - mentioned sub - embodiment, when the value of the one 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 one Random Access Preamble index is 0b000000 and no candidate cell configured with UE - based timing advance measurement is configured, the one Cell indicator field is reserved.

[0605] As a subsidiary embodiment of the above - mentioned sub - embodiment, when the value of the one Random Access Preamble index is 0b000000, X is the number of configured LTM candidate cells, and if no LTM candidate cell is configured, the one Cell indicator field is reserved.

[0606] As a subsidiary embodiment of the above - mentioned sub - embodiment, when the value of the one Random Access Preamble index is 0b000000, X is 8; if no LTM candidate cell is configured, the one Cell indicator field is reserved.

[0607] As a sub - embodiment of the above - mentioned embodiment, all 0s in the one Cell indicator field indicate the first serving cell.

[0608] As a sub - embodiment of the above - mentioned embodiment, when the bits in the one Frequency domain resource assignment field in the first signaling are all 1, the value of the one Random Access Preamble index field is equal to 0b000000, and the one Cell indicator field is all 0, the first signaling indicates that the user performs CBRA on the first serving cell.

[0609] As a sub - embodiment of the above - mentioned embodiment, when the value of the one Random Access Preamble index field is equal to 0b000000 and the one Cell indicator field is not all 0, the one Cell indicator indicates to perform UE - based timing advance measurement for the first candidate cell.

[0610] As a sub - embodiment of the above - mentioned embodiment, when the value of the one Random Access Preamble index field is not equal to 0b000000 and the one Cell indicator field is not all 0, the one Cell indicator indicates to send a Preamble on the first candidate cell to perform early uplink synchronization.

[0611] As an embodiment, the first identifier occupies a consecutive number of bits in the first signaling immediately following the first field.

[0612] As an embodiment, the first identifier occupies a consecutive number of bits in the first signaling immediately following the one Random Access Preamble index field.

[0613] As an embodiment, the first identifier occupies a consecutive number of bits in the first signaling immediately following the one Cell indicator field.

[0614] As an embodiment, the first signaling contains the configuration information required to perform the UE - based timing advance measurement process for the first candidate cell.

[0615] As a sub - embodiment of the above - mentioned embodiment, the configuration information is after the first field.

[0616] As a sub - embodiment of the above - mentioned embodiment, the configuration information is after the one Random Access Preamble index field.

[0617] As a sub - embodiment of the above - mentioned embodiment, the configuration information is after the one Cell indicator field.

[0618] As a sub - embodiment of the above - mentioned embodiment, the configuration information is after the first identifier.

[0619] Example 12

[0620] Embodiment 12 exemplifies a structural block diagram of a processing device in a first node according to an embodiment of the present application; as shown in the appendix Figure 12 shown. In the appendix Figure 12 A first processor 1200 in the first node includes a first transmitter 1201 and a first receiver 1202.

[0621] The first processor 1200 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 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 sub - layer; and performs the UE - based timing advance measurement for the first candidate cell.

[0622] In Embodiment 12, the performing of the UE - based timing advance measurement for the first candidate cell depends on at least the former of a first domain of the first signaling and a first timer, the first timer indicates whether the uplink is synchronized; the first signaling includes at least one of DCI or timing advance for the first serving cell or the first identifier; the first domain of the first signaling depends on the configuration information of the first candidate cell.

[0623] 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.

[0624] As an embodiment, the performing 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.

[0625] 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.

[0626] 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; and the first signaling includes the timing advance for the first serving cell.

[0627] 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.

[0628] 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.

[0629] As an embodiment, the first receiver 1202 includes the attached Figure 4 At least one of the antenna 452 or the receiver 454 or the multi-antenna receive processor 458 or the receive processor 456 or the controller / processor 459 or the memory 460 or the data source 467.

[0630] As an embodiment, the first receiver 1202 includes the attached Figure 4 At least an antenna 452 and a receiver 454.

[0631] As an embodiment, the first transmitter 1201 includes the attached Figure 4 At least one of the antenna 452 or the transmitter 454 or the multi-antenna transmit processor 457 or the transmit processor 468 or the controller / processor 459 or the memory 460 or the data source 467.

[0632] As an embodiment, the first transmitter 1201 includes the attached Figure 4 At least antenna 452 and transmitter 454.

[0633] Example 13

[0634] Embodiment 13 exemplifies a structural block diagram of a processing device in a second node according to an embodiment of the present application; as shown in the accompanying Figure 13 figure. In the accompanying Figure 13 figure, a second processor 1300 in the second node includes a second transmitter 1301 and a second receiver 1302.

[0635] The second transmitter 1301 transmits a first RRC message, the first RRC message includes configuration information of a first candidate cell, and the configuration information of the first candidate cell indicates a first identifier of the first candidate cell and UE-based timing advance measurement for the first candidate cell; transmits a first signaling, and the first signaling is a signaling of a protocol layer below the RRC sublayer.

[0636] 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 a first domain of the first signaling and a first timer, and the first timer indicates whether the uplink is synchronized; the first signaling includes at least one of DCI or timing advance for a first serving cell or the first identifier; the first domain of the first signaling depends on the configuration information of the first candidate cell.

[0637] As an embodiment, 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.

[0638] As an embodiment, the execution of the UE-based timing advance measurement for the first candidate cell depends on the second timer not being running; the second timer controls whether the uplink of the first candidate cell is synchronized.

[0639] 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; the first timer controls whether the uplink of the first candidate cell is synchronized.

[0640] As an embodiment, 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; the first signaling includes timing advance for the first serving cell.

[0641] As an embodiment, the first signaling indicates a first time interval, and the UE-based timing advance measurement for the first candidate cell depends on the first time interval.

[0642] 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.

[0643] As an embodiment, the second transmitter 1301 includes the attached Figure 4 At least one of the antenna 420 or the transmitter 418 or the multi-antenna transmit processor 471 or the transmit processor 416 or the controller / processor 475 or the memory 476.

[0644] As an embodiment, the second transmitter 1301 includes the attached Figure 4 At least antenna 420 and transmitter 418.

[0645] As an embodiment, the second receiver 1302 includes the attached Figure 4 At least one of the antenna 420 or the receiver 418 or the multi-antenna reception processor 472 or the reception processor 470 or the controller / processor 475 or the memory 476.

[0646] As an embodiment, the second receiver 1302 includes the attached Figure 4 At least an antenna 420 and a receiver 418.

[0647] Example 14

[0648] Embodiment 14 illustrates a schematic diagram of a first signaling format according to an embodiment of the present application, as shown in the attached Figure 14 shown.

[0649] 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.

[0650] As an example, a first RRC message is received, 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 UE-based timing advance measurement for the first candidate cell; a first signaling is received, the first signaling being a MAC CE; UE-based timing advance measurement for the first candidate cell is performed; wherein the performing of the UE-based timing advance measurement for the first candidate cell depends on at least the former of a first field of the first signaling and a first timer, the first timer indicating whether the uplink is synchronized; the first signaling includes at least a first bitmap, at least one bit in the first bitmap being mapped one-to-one to at least one LTM candidate cell, one bit in the first bitmap indicating the first identifier; the first field of the first signaling depends on the configuration information of the first candidate cell.

[0651] As an example, the first signaling is a Candidate Cell TCI States (or State) Activation / Deactivation MAC CE.

[0652] As an example, the first signaling is a UE based Timing Advance (TA) Measurement Activation / Deactivation MAC CE.

[0653] As an example, 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.

[0654] As an example, 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.

[0655] As an example, the size of the first bitmap is 8 bits.

[0656] As an example, the size of the first bitmap is less than 8 bits.

[0657] As an example, the at least one candidate cell is the first candidate cell.

[0658] As an example, 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.

[0659] As an example, the at least one candidate cell is configured by the first RRC message.

[0660] As an example, the at least one candidate cell is configured for a cell group of the first node.

[0661] As an example, any one of the at least one candidate cells is an LTM candidate cell.

[0662] As an example, any one of the at least one candidate cells is an LTM candidate cell configured with early uplink synchronization.

[0663] As an example, any one of the at least one candidate cells is an LTM candidate cell configured with CG resources.

[0664] As an example, the one-to-one mapping of at least one bit in the first bitmap to at least one candidate cell means that at least one bit in the first bitmap respectively corresponds to the at least one candidate cell.

[0665] As an example, the one-to-one mapping of at least one bit in the first bitmap to at least one candidate cell means that each bit in at least one bit in the first bitmap indicates one candidate cell in the at least one candidate cell.

[0666] As an example, the bits corresponding to the at least one candidate cell in the first bitmap are sorted in ascending order of LTM-CandidateId.

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

[0668] As an example, the first bitmap occupies the consecutive at least one bit starting from the most significant bit of an octet.

[0669] As an example, the first bitmap occupies the consecutive at least one bit starting from the least significant bit of an octet.

[0670] As an example, the size of the first bitmap is equal to the number of the at least one candidate cell.

[0671] As an embodiment, the first signaling includes configuration information of the TCI state of the candidate cell.

[0672] As an embodiment, the configuration information of the TCI state of the candidate cell includes one octet.

[0673] As an embodiment, the configuration information of the TCI state of the candidate cell includes multiple octets.

[0674] As an embodiment, the size of the configuration information of the TCI state of the candidate cell is variable.

[0675] As an embodiment, the configuration information of the TCI state of the candidate cell includes one octet containing the Xi field and one octet containing the Pi field, and the one octet containing the Xi field and the one octet containing the Pi field correspond one by one, and each Xi field indicates whether the corresponding Pi field exists; the i is an integer not less than 1 and not greater than 8.

[0676] As a sub - embodiment of the above - mentioned embodiment, each Xi field occupies 1 bit, and each Pi field occupies 1 bit.

[0677] As a sub - embodiment of the above - mentioned 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.

[0678] As a sub - embodiment of the above - mentioned 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.

[0679] As a sub - embodiment of the above - mentioned embodiment, when a Xi field indicates that the corresponding Pi field exists, the Pi field corresponding to the Xi field indicates one of a TCI state or two TCI states.

[0680] As a sub - embodiment of the above - mentioned embodiment, when a Xi field indicates that the corresponding Pi field does not exist, the Xi field is reserved.

[0681] As a sub - embodiment of the above - mentioned embodiment, the Xi field is only for convenience of description and can be replaced by other letters to achieve the same effect.

[0682] As an embodiment, the configuration information of the TCI state of the candidate cell includes one octet containing the Pi field, and each Pi field in the one octet containing the Pi field indicates one of a TCI state or two TCI states.

[0683] As an example, 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.

[0684] As an example, one bit in the first bitmap indicates whether the first signaling includes the configuration information of the TCI state of the candidate cell corresponding to the one bit.

[0685] As a sub - example of the above example, a bit value of 1 in the first bitmap indicates that the first signaling includes the configuration information of the TCI state of the candidate cell corresponding to the one bit; a bit value of 0 in the first bitmap indicates that the first signaling does not include the configuration information of the TCI state of the candidate cell corresponding to the one bit; the first bit is 1.

[0686] As a sub - example of the above example, a bit value of 0 in the first bitmap indicates that the first signaling includes the configuration information of the TCI state of the candidate cell corresponding to the one bit; a bit value of 1 in the first bitmap indicates that the first signaling does not include the configuration information of the TCI state of the candidate cell corresponding to the one bit; the first bit is 0.

[0687] As an example, one bit in the first bitmap indicates whether to perform the UE - based timing advance measurement for the candidate cell corresponding to the one bit.

[0688] As a sub - example of the above example, a bit value of 0 in the first bitmap indicates to perform the UE - based timing advance measurement for the candidate cell corresponding to the one bit; a bit value of 1 in the first bitmap does not indicate to perform the UE - based timing advance measurement for the candidate cell corresponding to the one bit; the first bit is 0.

[0689] As a sub - example of the above example, a bit value of 1 in the first bitmap indicates to perform the UE - based timing advance measurement for the candidate cell corresponding to the one bit; a bit value of 0 in the first bitmap does not indicate to perform the UE - based timing advance measurement for the candidate cell corresponding to the one bit; the first bit is 1.

[0690] As a sub - example of the above example, the indication of whether to perform means: indication of whether to activate; the indication of performing means: indication of activation; the indication of not performing means: indication of not activation; the first bit is 0.

[0691] As a sub - embodiment of the above - mentioned embodiment, the indication of whether to execute means: indicating activation or de - activation; the indication to execute means: indicating activation; the indication not to execute means: indicating de - activation; the first bit is 1.

[0692] As an embodiment, the first signaling includes the first bitmap and the second bitmap; one bit in the first bitmap indicates whether to perform the UE - based timing advance measurement for the candidate cell corresponding to the bit; one bit in the second bitmap indicates whether the first signaling includes the configuration information of the TCI state of the candidate cell corresponding to the bit.

[0693] As a sub - embodiment of the above - mentioned embodiment, one bit in the second bitmap being 1 indicates that the first signaling includes the configuration information of the TCI state of the candidate cell corresponding to the bit; one bit in the second bitmap being 0 indicates that the first signaling does not include the configuration information of the TCI state of the candidate cell corresponding to the bit; the first bit is 1.

[0694] As a sub - embodiment of the above - mentioned embodiment, one bit in the second bitmap being 0 indicates that the first signaling includes the configuration information of the TCI state of the candidate cell corresponding to the bit; one bit in the second bitmap being 1 indicates that the first signaling does not include the configuration information of the TCI state of the candidate cell corresponding to the bit; the first bit is 0.

[0695] As an embodiment, the first signaling includes the first bitmap, and the first signaling includes a Candidate Cell ID field, and the Candidate Cell ID field indicates to perform the UE - based timing advance measurement for the candidate cell corresponding to the bit; one bit in the first bitmap indicates whether the first signaling includes the configuration information of the TCI state of the candidate cell corresponding to the bit.

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

[0697] As an example, when the first signaling does not contain the configuration information of the TCI state of a certain candidate cell, the activated TCI state of the certain candidate cell remains unchanged.

[0698] As an example, annex Figure 14 All the dashed boxes F14.1 in it are optional.

[0699] As an example, annex Figure 14 All the dashed boxes F14.1 in it exist.

[0700] As an example, annex Figure 14 All the dashed boxes F14.1 in it do not exist.

[0701] As an example, the deactivation of the TCI state of the first node candidate cell by the first signaling is implicit.

[0702] As a sub - example of the above example, when the first signaling does not contain the configuration information of the TCI state of a certain candidate cell, deactivate all the activated TCI state information of the certain candidate cell.

[0703] As a sub - example of the above example, when the configuration information of the TCI state of a certain candidate cell corresponding to the first signaling does not contain a certain previously activated TCI state, then deactivate the certain previously activated TCI state.

[0704] As a sub - example of the above example, deactivate all the previously activated candidate cell TCI states except the TCI states included in the configuration information of the TCI state of the candidate cell in the first signaling.

[0705] As an example, annex Figure 14 It is only to illustrate a possible implementation form of the first signaling, and does not limit the specific implementation or the standard to adopt other similar forms to achieve the same or similar technical effects

[0706] Those of ordinary skill in the art can understand that all or part of the steps in the above methods 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 disc, etc. Optionally, all or part of the steps of the above embodiments can also be implemented using one or more integrated circuits. Correspondingly, each module unit in the above embodiments can be implemented in a hardware form or in the form of a software function module. This application is not limited to any specific form of the 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 control airplanes, aircraft, small airplanes, mobile phones, tablet computers, notebooks, vehicle-mounted communication devices, wireless sensors, network cards, Internet of Things terminals, RFID terminals, NB-IOT terminals, MTC (Machine Type Communication) terminals, eMTC (enhanced MTC) terminals, data cards, network cards, vehicle-mounted communication devices, low-cost mobile phones, low-cost tablet computers, and other wireless communication devices. The base station or system equipment in this application includes, but is 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.

[0707] As described above, the foregoing are only the preferred embodiments of the present application and are not intended to limit the protection scope of the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A first node used for wireless communication, characterized in that, Comprising: A first processor, which receives 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 UE-based timing advance measurement for the first candidate cell; Receives a first signaling, the first signaling being a signaling of a protocol layer below the RRC sublayer; performs the UE-based timing advance measurement for the first candidate cell; Wherein, the performing of the UE-based timing advance measurement for the first candidate cell depends on at least the former of a first field of the first signaling and a first timer, 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.

2. The first node according to claim 1, characterized in that, 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 depends on the second timer not being running; the second timer controls whether the uplink of the first candidate cell is synchronized.

4. 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 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 for 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 performing 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 one Frequency domain resource assignment field is set to all 1s.

8. A second node used for wireless communication, characterized in that, Comprising: A second processor, which 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 UE-based timing advance measurement for the first candidate cell; Sends 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; 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 domain of the first signaling and the first timer, and the first timer indicates whether the uplink is synchronized; the first signaling includes at least one of DCI, the timing advance for the first serving cell, or the first identifier; the first domain of the first signaling depends on the configuration information of the first candidate cell.

9. A method used in a first node for wireless communication, characterized in that, Comprising: 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 a 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 domain of the first signaling and the first timer, and the first timer indicates whether the uplink is synchronized; the first signaling includes at least one of DCI, the timing advance for the first serving cell, or the first identifier; the first domain of the first signaling depends on the configuration information of the first candidate cell.

10. A method in a second node used for wireless communication, characterized in that, Comprising: 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 performing a 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 domain of the first signaling and the first timer, and the first timer indicates whether the uplink is synchronized; the first signaling includes at least one of DCI, the timing advance for the first serving cell, or the first identifier; the first domain of the first signaling depends on the configuration information of the first candidate cell.

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