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. The terminal receives the first RRC message; the first RRC message comprises configuration information of a first candidate cell and a first threshold value; receiving the first DCI; wherein the first DCI is used for indicating a first preamble of the first candidate cell; whether the measurement of the first Preamble dependency for the first candidate cell is transmitted on the first candidate cell or not; whether to transmit the first preamble on the first candidate cell depends on a measurement for the first candidate cell comprises: when a first measurement result of at least the first candidate cell is greater than the first threshold value, transmitting the first preamble on the first candidate cell. According to the scheme provided by the invention, the enhancement of the random access resource selection process of the early uplink synchronization based on the PDCCH order can be realized; the protocol can flexibly adapt to different measurement results so as to balance network interaction delay and reliability.

Description

Technical Field

[0001] The present application relates to a transmission method and apparatus in a wireless communication system, and particularly to a method and apparatus for random access. Background Art

[0002] With the continuous development of wireless communication, the requirements for mobility, transmission delay, and system capacity are getting higher and higher. The 3GPP RAN (Radio Access Network) #94e meeting decided to study L1 (Layer 1) / L2 (Layer 2) Triggered Mobility (LTM) in the "Further NR mobility enhancements" Work Item (WI) of the "NR (New Radio) mobility further enhancements" research project.

[0003] To enhance the LTM process, LTM supports early uplink synchronization. The serving cell triggers random access on the LTM candidate cell through a PDCCH order. After the UE sends a Preamble on the LTM candidate cell, it does not receive an RAR on the LTM candidate cell. The serving cell sends the TA of the candidate cell to the UE through an LTM Cell Switch Command MAC CE. By interacting with the candidate cell in advance, early uplink synchronization can significantly reduce the handover delay.

[0004] To enhance the measurement reporting process of LTM, 3GPP will introduce event-triggered L1 measurement reporting in Release 19, including aspects such as configuration methods, event definitions, and filtering methods. Summary of the Invention

[0005] In the existing random access process triggered by a PDCCH order, the UE sends a Preamble according to the indication of the PDCCH order, and the UE does not check the signal quality of the reference signal indicated by the PDCCH order. With the change of communication scenario requirements, the inventors found that in some scenarios, this solution is no longer applicable, especially: in the existing LTM process, the UE sends an L1 measurement report according to the configuration, and the network instructs the UE to perform early uplink synchronization according to the UE's measurement report to reduce the handover delay when performing an LTM cell handover; in the existing early uplink synchronization process, the UE sends a Preamble on the specified random access resource on the candidate cell according to the network configuration and the indication in the PDCCH order received by the serving cell. If the channel quality changes after the L1 measurement report is sent, it may lead to waste of wireless resources and handover failure. Therefore, it is necessary to enhance the random access process.

[0006] 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, achieving 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, achieving 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, achieving 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., achieving technical effects similar to those of LTM. Further, although the original intention of the present application is for the scenario of a terminal and a base station, the present application is also equally applicable to the V2X (Vehicle-to-Everything) scenario, the communication scenarios between a terminal and a relay, and between a relay and a base station, achieving technical effects similar to those in the scenario of a terminal and a base station. Further, although the original intention of the present application is for the scenario of a terminal and a base station, the present application is also equally applicable to the communication scenario of IAB (Integrated Access and Backhaul), achieving technical effects similar to those in the scenario of a terminal and a base station. 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 a non-terrestrial network (NTN), achieving 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.

[0007] As an example, the interpretation of the terminology in the present application refers to the definitions in the 3GPP specification protocol series TS36.

[0008] As an example, the interpretation of the terminology in the present application refers to the definitions in the 3GPP specification protocol series TS38.

[0009] As an example, the interpretation of the terminology in the present application refers to the definitions in the 3GPP specification protocol series TS37.

[0010] 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.

[0011] This application discloses a method used in a terminal, which is characterized by including:

[0012] Receiving a first RRC message; wherein, the first RRC message includes configuration information of a first candidate cell and a first threshold;

[0013] Receiving a first DCI; wherein, the first DCI indicates a first Preamble of the first candidate cell;

[0014] Wherein, whether to send the first Preamble on the first candidate cell depends on the measurement for the first candidate cell; the whether to send the first Preamble on the first candidate cell depends on the measurement for the first candidate cell includes:

[0015] When at least a first measurement result of the first candidate cell is greater than the first threshold, send the first Preamble on the first candidate cell.

[0016] As an embodiment, the problems to be solved by this application include: how to enhance the existing early uplink synchronization process.

[0017] As an embodiment, the problems to be solved by this application include: how to enhance the random access resource selection process of the existing early uplink synchronization based on PDCCH order.

[0018] As an embodiment, the problems to be solved by this application include: how to design the RSRP check condition for the early uplink synchronization based on PDCCH order.

[0019] As an embodiment, the problems to be solved by this application include: if the RSRP check condition is met, how the early uplink synchronization based on PDCCH order should select random access resources.

[0020] As an embodiment, the problems to be solved by this application include: if the RSRP check condition is not met, how the process of the early uplink synchronization based on PDCCH order should be executed.

[0021] As an embodiment, the problems to be solved by this application include: if the RSRP check condition is not met, how the early uplink synchronization based on PDCCH order should select random access resources.

[0022] As an embodiment, the problems to be solved by the present application include: how to report if the RSRP check condition is not met.

[0023] As an embodiment, the characteristics of the above method include: whether to send the first Preamble on the first candidate cell depends on the measurement of the first candidate cell.

[0024] As an embodiment, the characteristics of the above method include: when the first measurement result of at least the first candidate cell is greater than the first threshold, send the first Preamble on the first candidate cell.

[0025] As an embodiment, the advantages of the above method include: it is beneficial to enhance the random access resource selection process for early uplink synchronization based on PDCCH order, and to cancel the Preamble transmission of unreasonable early uplink synchronization.

[0026] As an embodiment, the advantages of the above method include: it is beneficial to make the protocol flexibly adapt to different measurement results, and to balance network interaction latency and reliability.

[0027] As an embodiment, the advantages of the above method include: it is beneficial to reduce inappropriate early uplink synchronization and avoid waste of wireless resources.

[0028] As an embodiment, the advantages of the above method include: it is beneficial to select appropriate UE behaviors according to different measurement results to balance robustness and network optimization efficiency.

[0029] As an embodiment, the advantages of the above method include: it is beneficial to reduce signaling interaction.

[0030] According to one aspect of the present application, it is characterized in that it includes:

[0031] Send a first signaling on a first serving cell;

[0032] Wherein, the first measurement result of the first candidate cell being less than the first threshold triggers the first signaling; the first candidate cell is a candidate cell of the first serving cell.

[0033] As an embodiment, the advantages of the above method include: the above method is beneficial to the network to optimize subsequent mobility decisions according to the report.

[0034] As an embodiment, the advantages of the above method include: it is beneficial to reduce the configuration of inappropriate early uplink synchronization.

[0035] As an embodiment, the advantages of the above method include: it is beneficial to reduce signaling interaction.

[0036] According to one aspect of the present application, it is characterized by including:

[0037] In response to receiving the first DCI, initiate a first random access procedure;

[0038] Wherein, whether to send the first preamble on the first candidate cell is determined during the first random access procedure.

[0039] As an embodiment, the advantages of the above method include: facilitating reducing the modification to the existing protocol.

[0040] As an embodiment, the advantages of the above method include: facilitating the backward compatibility of the protocol.

[0041] As an embodiment, the advantages of the above method include: facilitating the forward compatibility of the protocol.

[0042] According to one aspect of the present application, it is characterized in that whether to send the first preamble on the first candidate cell depends on the measurement for the first candidate cell, including: whether to initiate the first random access procedure in response to receiving the first DCI depends on the measurement for the first candidate cell, and the first random access procedure includes sending the first preamble on the first candidate cell; wherein, whether to initiate the first random access procedure depends on the measurement for the first candidate cell, including:

[0043] When at least the first measurement result of the first candidate cell is greater than the first threshold, initiate the first random access procedure.

[0044] As an embodiment, the advantages of the above method include: the above method is beneficial to the service continuity of the terminal.

[0045] As an embodiment, the advantages of the above method include: facilitating reducing the interruption of the service cell traffic transmission caused by the early uplink synchronization of the terminal.

[0046] According to one aspect of the present application, it is characterized in that the first DCI indicates the first reference signal resource of the first candidate cell; the first measurement result of the first candidate cell includes: the measurement result of the first reference signal resource.

[0047] As an embodiment, the advantages of the above method include: facilitating avoiding inappropriate early uplink synchronization.

[0048] According to one aspect of the present application, it is characterized by including:

[0049] Send a second signaling;

[0050] Wherein, the second signaling includes a second measurement result of the first candidate cell; and the second signaling triggers the first DCI.

[0051] As an embodiment, the advantages of the above method include: being conducive to reducing the modification of the existing protocol.

[0052] As an embodiment, the advantages of the above method include: being conducive to reducing signaling interaction.

[0053] According to one aspect of the present application, it is characterized in that only when the first time window is running, the determination of whether to send the first preamble on the first candidate cell depending on the measurement of the first candidate cell is valid; wherein, the start time of the first time window depends on the first DCI.

[0054] As an embodiment, the advantages of the above method include: being conducive to reducing signaling interaction.

[0055] As an embodiment, the advantages of the above method include: being conducive to the network to control the behavior of the UE.

[0056] As an embodiment, the advantages of the above method include: being conducive to flexibly configuring the check conditions for early uplink synchronization according to different measurement results.

[0057] The present application discloses a method used in a base station, which is characterized by including:

[0058] Sending a first RRC message; wherein, the first RRC message includes configuration information of a first candidate cell and a first threshold;

[0059] Sending a first DCI; wherein, the first DCI indicates a first preamble of the first candidate cell;

[0060] Wherein, whether the receiver of the first DCI sends the first preamble on the first candidate cell depends on the measurement of the first candidate cell; the determination of whether to send the first preamble on the first candidate cell depending on the measurement of the first candidate cell includes:

[0061] When at least a first measurement result of the first candidate cell is greater than the first threshold, sending the first preamble on the first candidate cell.

[0062] According to one aspect of the present application, it is characterized by including:

[0063] Receiving a first signaling on a first serving cell;

[0064] Wherein, the first measurement result of the first candidate cell being less than the first threshold triggers the first signaling; the first candidate cell is a candidate cell of the first serving cell.

[0065] According to one aspect of the present application, it is characterized in that, in response to receiving the first DCI, the receiver of the first DCI initiates a first random access procedure; wherein, whether to send the first preamble on the first candidate cell is determined in the first random access procedure.

[0066] According to one aspect of the present application, it is characterized in that whether to send the first preamble on the first candidate cell depending on the measurement of the first candidate cell includes: whether the receiver of the first DCI initiates a first random access procedure depending on the measurement of the first candidate cell in response to receiving the first DCI, the first random access procedure including sending the first preamble on the first candidate cell; wherein, whether to initiate the first random access procedure depending on the measurement of the first candidate cell includes:

[0067] When at least the first measurement result of the first candidate cell is greater than the first threshold, initiate the first random access procedure.

[0068] According to one aspect of the present application, it is characterized in that the first DCI indicates a first reference signal resource of the first candidate cell; the first measurement result of the first candidate cell includes: the measurement result of the first reference signal resource.

[0069] According to one aspect of the present application, it is characterized in that it includes:

[0070] Receive a second signaling;

[0071] Wherein, the second signaling includes a second measurement result of the first candidate cell; the second signaling triggers the first DCI.

[0072] According to one aspect of the present application, it is characterized in that only when the first time window is running, does whether to send the first preamble on the first candidate cell depending on the measurement of the first candidate cell hold; wherein, the start time of the first time window depends on the first DCI.

[0073] The present application discloses a method used in a terminal, which is characterized in that it includes:

[0074] Receive a first RRC message; wherein, the first RRC message includes configuration information of a first candidate cell and a first time window;

[0075] Receive a first DCI; wherein, the first DCI indicates a first preamble of the first candidate cell.

[0076] Wherein, whether to send the first preamble on the first candidate cell depends on whether a first time window is running; the statement that whether to send the first preamble on the first candidate cell depends on whether a first time window is running includes:

[0077] When at least the first time window is running, send the first preamble on the first candidate cell.

[0078] As an embodiment, the characteristics of the above method include: whether to send the first preamble on the first candidate cell depends on whether a first time window is running.

[0079] As an embodiment, the characteristics of the above method include: when at least the first time window is running, send the first preamble on the first candidate cell.

[0080] As an embodiment, the advantages of the above method include: being conducive to reducing signaling interaction.

[0081] As an embodiment, the advantages of the above method include: being conducive to the network to control the behavior of the UE.

[0082] As an embodiment, the advantages of the above method include: being conducive to flexibly configuring the check conditions for early uplink synchronization according to different measurement results.

[0083] As an embodiment, the advantages of the above method include: being conducive to achieving different mobility metrics in multiple scenarios through the configuration of different time window sizes.

[0084] This application discloses a method used in a base station, which is characterized by including:

[0085] Send a first RRC message; wherein, the first RRC message includes configuration information of a first candidate cell and a first time window.

[0086] Send a first DCI; wherein, the first DCI indicates a first preamble of the first candidate cell.

[0087] Wherein, whether to send the first preamble on the first candidate cell depends on whether a first time window is running; the statement that whether to send the first preamble on the first candidate cell depends on whether a first time window is running includes:

[0088] When at least the first time window is running, send the first Preamble on the first candidate cell.

[0089] This application discloses a terminal, which is characterized by including:

[0090] The terminal includes: one or more processors and a memory;

[0091] The memory is coupled to the one or more processors, and the memory is used to store computer program code. The computer program code includes computer instructions, and the one or more processors call the computer instructions to enable the terminal to execute the method for the terminal.

[0092] This application discloses a base station, which is characterized by including:

[0093] The base station includes: one or more processors and a memory;

[0094] The memory is coupled to the one or more processors, and the memory is used to store computer program code. The computer program code includes computer instructions, and the one or more processors call the computer instructions to enable the base station to execute the method for the base station.

[0095] As an embodiment, compared with the traditional solution, this application has the following advantages:

[0096] -. It is beneficial to enhance the random access resource selection process for early uplink synchronization based on PDCCH order, and cancel the Preamble transmission of unreasonable early uplink synchronization.

[0097] -. It is beneficial to make the protocol flexibly adapt to different measurement results, and is beneficial to balance network interaction latency and reliability.

[0098] -. It is beneficial to reduce inappropriate early uplink synchronization and avoid waste of wireless resources.

[0099] -. It is beneficial to select appropriate UE behaviors according to different measurement results to balance robustness and network optimization efficiency.

[0100] -. It is beneficial to enable the network to optimize subsequent mobility decisions according to the reports.

[0101] -. It is beneficial to reduce the modification of the existing protocol.

[0102] -. It is beneficial to the service continuity of the terminal.

[0103] -. It is beneficial to reduce the interruption of service cell traffic transmission caused by the terminal due to early uplink synchronization.

[0104] -. Facilitate flexible configuration of the check conditions for early uplink synchronization according to different measurement results. BRIEF DESCRIPTION OF THE DRAWINGS

[0105] Other features, objectives, and advantages of the present application will become more apparent by reading the detailed description of the non-limiting embodiments with reference to the following drawings:

[0106] Figure 1 Shows a flowchart according to an embodiment of the present application;

[0107] Figure 2 Shows a schematic diagram of a network architecture according to an embodiment of the present application;

[0108] 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;

[0109] Figure 4 Shows a schematic diagram of a first communication device and a second communication device according to an embodiment of the present application;

[0110] Figure 5 Shows a flowchart of wireless signal transmission according to an embodiment of the present application;

[0111] Figure 6 Shows a schematic diagram of the relationship between a first DCI, a first threshold, and a first measurement result according to an embodiment of the present application;

[0112] Figure 7 Shows a schematic diagram of a first reference signal resource according to an embodiment of the present application;

[0113] Figure 8 Shows a schematic diagram of a first time window according to an embodiment of the present application;

[0114] Figure 9 Shows a block diagram of a processing device in a terminal according to an embodiment of the present application;

[0115] Figure 10 Shows a block diagram of a processing device in a base station according to an embodiment of the present application;

[0116] Figure 11 Shows a flowchart according to an embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0117] The technical solutions of the present application will be further described in detail below with reference to the drawings. It should be noted that, without conflict, the embodiments and the features in the embodiments in the present application can be combined with each other arbitrarily.

[0118] Example 1

[0119] Example 1 exemplifies a flowchart according to an embodiment of the present application, as shown in the appendix Figure 1 shown. In the appendix Figure 1 , each box represents a step. It should be particularly emphasized that the order of the boxes in the figure does not represent the chronological relationship between the represented steps.

[0120] In Example 1, the terminal in the present application, in step 101, receives a first RRC message; wherein, the first RRC message includes configuration information of a first candidate cell and a first threshold; in step 102, receives a first DCI; wherein, the first DCI indicates a first preamble of the first candidate cell;

[0121] wherein, whether to send the first preamble on the first candidate cell depends on the measurement for the first candidate cell; the whether to send the first preamble on the first candidate cell depends on the measurement for the first candidate cell includes: when at least the first measurement result of the first candidate cell is greater than the first threshold, send the first preamble on the first candidate cell.

[0122] As an embodiment, the first RRC message is an RRC reconfiguration message.

[0123] As an embodiment, the first candidate cell is an LTM candidate.

[0124] As an embodiment, the first candidate cell is a CHO candidate.

[0125] As an embodiment, the first candidate cell is a conditional LTM candidate.

[0126] As an embodiment, the first serving cell is an SPCell.

[0127] As an embodiment, the first serving cell is a PCell.

[0128] As an embodiment, the first serving cell is the cell indicated by the first RRC message.

[0129] As an embodiment, the first serving cell is a PSCell.

[0130] As an embodiment, the first RRC configures the first candidate cell.

[0131] As an embodiment, the first RRC message is a measurement configuration message.

[0132] As an embodiment, the first RRC message includes a ReportConfigNR field.

[0133] As an embodiment, the first RRC message configures the first condition.

[0134] As an embodiment, the first RRC message configures condition reconfiguration.

[0135] As an embodiment, the first RRC message configures continuous condition reconfiguration.

[0136] As an embodiment, the first RRC message includes an LTM-Config field.

[0137] As an embodiment, the first RRC message includes an LTM-Candidate field.

[0138] As an embodiment, an ltm-CandidateId field is included in the LTM-Candidate field; the ltm-CandidateId field indicates the first candidate cell.

[0139] As an embodiment, an ltm-CandidatePCI field is included in the LTM-Candidate field; the ltm-CandidatePCI field indicates the physical cell ID of the candidate cell.

[0140] As an embodiment, the first RRC message includes measurement configuration.

[0141] As an embodiment, the first RRC message includes a MeasConfig field.

[0142] As an embodiment, the first RRC message includes an EventTriggerConfig field.

[0143] As an embodiment, the first RRC message includes an EarlyUL-SyncConfig field; the EarlyUL-SyncConfig field configures some parameters for early uplink synchronization for the first candidate cell.

[0144] As an embodiment, the first DCI is a PDCCH order.

[0145] As an embodiment, the first DCI triggers an early uplink synchronization process.

[0146] As an embodiment, the early uplink synchronization process is based on the uplink timing advance acquisition of the PDCCH order.

[0147] As an embodiment, the uplink timing advance acquisition based on the PDCCH order includes transmitting the first preamble on the first candidate cell.

[0148] As an embodiment, the first candidate cell is an SCell of the terminal; wherein, the first serving cell is the PCell.

[0149] As an embodiment, the first candidate cell is an SCell of the terminal; wherein, the first serving cell is the PSCell.

[0150] As an embodiment, the first candidate cell is a PSCell of the terminal; wherein, the first serving cell is the PCell.

[0151] As an embodiment, the first candidate cell is a cell other than the serving cell of the terminal.

[0152] As an embodiment, the first candidate cell is not configured with the AdditionalPCIIndex.

[0153] As an embodiment, the configuration information of the first candidate cell includes the one LTM-Config field.

[0154] As an embodiment, the configuration information of the first candidate cell includes the one LTM-Candidate field.

[0155] As an embodiment, the configuration information of the first candidate cell includes the one ReportConfigNR field.

[0156] As an embodiment, the configuration information of the first candidate cell includes the one MeasConfig field.

[0157] As an embodiment, the configuration information of the first candidate cell includes the one EventTriggerConfig field.

[0158] As an embodiment, the configuration information of the first candidate cell includes the one EarlyUL-SyncConfig field.

[0159] As an embodiment, the first threshold is pre-configured.

[0160] As an embodiment, the first threshold is configured by the first RRC message.

[0161] As an embodiment, the first threshold is configured in the configuration information of the first candidate cell of the first RRC message.

[0162] As an embodiment, the first threshold is an rsrp-ThresholdSSB.

[0163] As an embodiment, the first threshold is an rsrp-ThresholdCSI-RS.

[0164] As an embodiment, the first measurement result of the first candidate cell being greater than the first threshold means that the first measurement result of the first candidate cell is greater than the sum of the first threshold and the first hysteresis value.

[0165] As an embodiment, the first hysteresis value is configured by the first RRC message.

[0166] As an embodiment, the first hysteresis value is Hysteresis.

[0167] As an embodiment, the first measurement result of the first candidate cell being greater than the first threshold means that the first measurement result of the first candidate cell is greater than the difference between the first threshold and the first hysteresis value and remains so for at least more than the first hysteresis time.

[0168] As an embodiment, the first hysteresis time is configured by the first RRC message.

[0169] As an embodiment, the first hysteresis time is TimeToTrigger.

[0170] As an embodiment, the first measurement result of the first candidate cell not being greater than the first threshold means that the first measurement result of the first candidate cell is not greater than the difference between the first threshold and the first hysteresis value.

[0171] As an embodiment, the first measurement result of the first candidate cell being greater than the first threshold means that the first measurement result of the first candidate cell is not greater than the difference between the first threshold and the first hysteresis value and remains so for at least more than the first hysteresis time.

[0172] As an embodiment, the first Preamble is for early uplink synchronization based on PDCCH order.

[0173] As an embodiment, the first Preamble depends on the first DCI.

[0174] As an embodiment, the first Preamble depends on the first RRC message.

[0175] As an embodiment, the first Preamble depends on downlink synchronization for the first candidate cell.

[0176] As an embodiment, in response to receiving the first DCI, the first Preamble is sent.

[0177] As an embodiment, the first DCI indicating the first Preamble of the first candidate cell means that the first DCI indicates the first candidate cell and the first Preamble.

[0178] As an embodiment, the first DCI includes a Cell indicator field; the Cell indicator field indicates the first candidate cell.

[0179] As an embodiment, the first DCI includes an SS / PBCH indicator field; the SS / PBCH indicator field indicates the SSB associated with the first Preamble.

[0180] As an embodiment, the first DCI includes a Random Access Preamble index field; the Random Access Preamble index field indicates the preamble index of the first Preamble.

[0181] As an embodiment, the first measurement result includes at least the measurement result for at least the first reference signal resource of the first candidate cell.

[0182] As an embodiment, the first measurement result is the measurement result for at least the first reference signal resource of the first candidate cell.

[0183] As an embodiment, the first reference signal resource is an SSB.

[0184] As an embodiment, the first reference signal resource includes at least the SSB associated with the first Preamble.

[0185] As an embodiment, the first reference signal resource is the SSB associated with the first Preamble.

[0186] As an embodiment, the first measurement result includes at least the measurement result for the SSB associated with the first Preamble.

[0187] As an embodiment, the first measurement result is the measurement result for the SSB associated with the first Preamble.

[0188] As an embodiment, the first reference signal resource is CSI-RS.

[0189] As an embodiment, the first reference signal resource includes at least the CSI-RS corresponding to the SSB associated with the first Preamble.

[0190] As an embodiment, the first reference signal resource is the CSI-RS corresponding to the SSB associated with the first Preamble.

[0191] As an embodiment, the first measurement result of the first candidate cell includes L3 measurement.

[0192] As an embodiment, the first measurement result of the first candidate cell includes L1 measurement.

[0193] As an embodiment, the first measurement result of the first candidate cell includes L3 and L1 measurements.

[0194] As an embodiment, the first measurement result of the first candidate cell includes beam measurement.

[0195] As an embodiment, the first measurement result of the first candidate cell includes cell-level measurement.

[0196] As an embodiment, the first measurement result of the first candidate cell includes RSRP measurement.

[0197] As an embodiment, the first measurement result of the first candidate cell includes RSRQ measurement.

[0198] As an embodiment, the first measurement result of the first candidate cell includes SINR measurement.

[0199] As an embodiment, the first measurement result of the first candidate cell includes CQI measurement.

[0200] As an embodiment, the first measurement result includes at least the measurement result for the CSI-RS corresponding to the SSB associated with the first Preamble.

[0201] As an embodiment, the first measurement result is the measurement result for the CSI-RS corresponding to the SSB associated with the first Preamble.

[0202] As an embodiment, the first measurement result is later than the first RRC message.

[0203] As an example, the first measurement result is earlier than the first DCI.

[0204] As an example, the first measurement result is not later than the first DCI.

[0205] As an example, the first measurement result depends on the first time interval.

[0206] As an example, the validity of the first measurement result depends on the first time interval.

[0207] As an example, the start time of the first time interval is the moment when the first measurement result is obtained.

[0208] As an example, the end time of the first time interval is the moment when it is determined whether to send the first Preamble on the first candidate cell.

[0209] As an example, the end time of the first time interval is the moment when the first Preamble is sent on the first candidate cell.

[0210] As an example, when the length of the first time interval is less than or equal to the first time length, the first measurement result is considered valid.

[0211] As an example, when the length of the first time interval is less than the first time length, the first measurement result is considered valid.

[0212] As an example, when the length of the first time interval is greater than the first time length, the first measurement result is considered invalid.

[0213] As an example, when the length of the first time interval is greater than or equal to the first time length, the first measurement result is considered invalid.

[0214] As an example, the first time length is pre-configured.

[0215] As an example, the first time length is configured by the first RRC message.

[0216] As an example, the first time length is predefined.

[0217] As an example, when the first measurement result is valid, whether to send the first Preamble on the first candidate cell depends on the measurement for the first candidate cell.

[0218] As an example, when the first measurement result is invalid, it is considered that the first measurement result of the first candidate cell is greater than the first threshold.

[0219] As an example, when the first measurement result is invalid, the first Preamble is sent on the first candidate cell.

[0220] As an example, whether to send the first Preamble on the first candidate cell depending on the measurement for the first candidate cell includes:

[0221] When at least the first measurement result of the first candidate cell is greater than the first threshold, the first Preamble is sent on the first candidate cell;

[0222] When the first measurement result of the first candidate cell is less than the first threshold, the first Preamble is not sent on the first candidate cell.

[0223] As an example, when the first measurement result of the first candidate cell is equal to the first threshold, the first Preamble is sent on the first candidate cell.

[0224] As an example, when the first measurement result of the first candidate cell is equal to the first threshold, the first Preamble is not sent on the first candidate cell.

[0225] As an example, on the premise that the first threshold is configured, whether to send the first Preamble on the first candidate cell depends on the measurement for the first candidate cell to hold.

[0226] As an example, on the premise that the first threshold is not configured, whether to send the first Preamble on the first candidate cell does not depend on the measurement for the first candidate cell.

[0227] As an example, in response to not sending the first Preamble on the first candidate cell, the second Preamble is sent on the first candidate cell.

[0228] As an example, the first Preamble is a Preamble of 4-step CFRA based on PDCCH order.

[0229] As an example, the second Preamble is a Preamble of CBRA.

[0230] As an embodiment, the second Preamble is associated with the SSB associated with the first Preamble indicated in the first DCI.

[0231] As an embodiment, the SSB associated with the second Preamble is the same as the SSB associated with the first Preamble.

[0232] As an embodiment, the SSB associated with the second Preamble is different from the SSB associated with the first Preamble.

[0233] As an embodiment, the SSB associated with the second Preamble depends on the second measurement result.

[0234] As an embodiment, the second measurement result is a measurement of at least one reference signal for the second candidate cell.

[0235] As an embodiment, the SSB associated with the second Preamble is the SSB corresponding to the reference signal with the highest RSRP in the second measurement result.

[0236] As an embodiment, the SSB associated with the second Preamble is the SSB corresponding to the reference signal with the highest RSRP among the reference signals in the second measurement result whose RSRP is greater than the first threshold.

[0237] As an embodiment, the SSB associated with the second Preamble is a random SSB among the SSBs corresponding to the reference signals in the second measurement result whose RSRP is greater than the first threshold.

[0238] As an embodiment, when the RSRP of any reference signal in the second measurement result is not greater than the first threshold, the SSB associated with the second Preamble is a random one of the SSBs corresponding to the reference signals in the second measurement result.

[0239] As an embodiment, in response to sending the second Preamble, the first random access response is received.

[0240] As an embodiment, the receiving of the first random access response means: listening for the first random access response.

[0241] As an embodiment, the receiving of the first random access response means: receiving the first random access response on the first candidate cell.

[0242] As an embodiment, the first random access response indicates a timing advance on the first candidate cell.

[0243] Example 2

[0244] Example 2 exemplifies a schematic diagram of a network architecture according to an embodiment of the present application, as shown in the appendix Figure 2 as attached Figure 2Describes the network architecture 200. The network architecture 200 is a 5G NR (New Radio) / LTE (Long-Term Evolution) / LTE-A (Long-Term Evolution Advanced) system, or the network architecture 200 is a 5G+ network architecture, or the network architecture 200 is a 6G network architecture, or the network architecture 200 is a network architecture that continues to evolve in the future by 3GPP; the network architecture 200 can be referred to as 5GS (5G System) / EPS (Evolved Packet System), or the network architecture 200 can be referred to as 6GS (6G System); the network architecture 200 includes at least one of UE (User Equipment) 201, RAN (Radio Access Network) 202, core network 210, HSS (Home Subscriber Server) / UDM (Unified Data Management) 220, and Internet service 230. The network architecture 200 can be interconnected with other access networks, but these entities / interfaces are not shown for simplicity. As shown in the figure, the network architecture 200 provides packet switching 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 switching services or other cellular networks. The RAN includes node 203 and other nodes 204. Node 203 provides user and control plane protocol termination towards UE 201. Node 203 can be connected to other nodes 204 via the Xn interface (e.g., backhaul) / X2 interface. Node 203 can also be referred to as a base station, base transceiver station, radio base station, radio transceiver, transceiver function, basic service set (BSS), extended service set (ESS), TRP (Transmission and Reception Point), or some other suitable term. The core network 210 is a 5GC (5G Core Network) / EPC (Evolved Packet Core), or the core network 210 is a 6GC; node 203 provides an access point to the core network 210 for UE 201. Examples of 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 devices.Those skilled in the art may also refer to the UE 201 as a mobile station, subscriber station, mobile unit, subscriber unit, radio unit, remote unit, mobile device, radio device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable term. The node 203 is connected to the core network 210 through the S1 / NG interface. The core network 210 includes an MME (Mobility Management Entity) / AMF (Authentication Management Field) / SMF (Session Management Function) 211, other MME / AMF / SMFs 214, an S-GW (Service Gateway) / UPF (User Plane Function) 212, and a P-GW (Packet Date Network Gateway) / UPF 213. The MME / AMF / SMF 211 is a control node that processes the signaling between the UE 201 and the core network 210. Generally, the MME / AMF / SMF 211 provides bearer and connection management. All user IP (Internet Protocol) packets are transmitted through the S-GW / UPF 212, and the S-GW / UPF 212 itself is connected to the P-GW / UPF 213. The P-GW provides UE IP address allocation and other functions. The P-GW / UPF 213 is connected to the Internet service 230. The Internet service 230 includes operator-corresponding Internet protocol services, specifically including the Internet, intranet, IMS (IP Multimedia Subsystem), and packet-switched streaming services.

[0245] As an embodiment, the UE 201 corresponds to the terminal in this application.

[0246] As an embodiment, the UE 201 is the terminal in this application.

[0247] As an embodiment, the UE 201 is a User Equipment (UE).

[0248] As an embodiment, the UE 201 is a Base Station (BS) device.

[0249] As an embodiment, the UE 201 is a Relay device.

[0250] As an example, the UE 201 is a gateway device.

[0251] As an example, the node 203 corresponds to the base station in this application.

[0252] As an example, the node 203 is the base station in this application.

[0253] As an example, the node 203 is a base station device.

[0254] As an example, the node 203 is a relay device.

[0255] As an example, the node 203 is a gateway device.

[0256] As an example, the user equipment supports 3GPP Release 19.

[0257] As an example, the user equipment supports 5G.

[0258] As an example, the user equipment supports 6G.

[0259] As an example, the user equipment supports Radio Link Monitoring (RLM).

[0260] As an example, the user equipment supports handover.

[0261] As an example, the user equipment supports CHO.

[0262] As an example, the user equipment supports CPC.

[0263] As an example, the user equipment supports LTM.

[0264] As an example, the user equipment supports intra-CU LTM.

[0265] As an example, the user equipment supports inter-CU LTM.

[0266] As an example, the user equipment supports conditional LTM.

[0267] As an example, the user equipment supports event-triggered measurement reporting for LTM.

[0268] As an example, the user equipment supports the transmission of a Non-Terrestrial Network (NTN).

[0269] As an example, the user equipment supports the transmission of a Terrestrial Network.

[0270] As an example, the user equipment supports Dual Connection (DC) transmission.

[0271] As an example, the user equipment includes a device that supports low-latency and high-reliability transmission.

[0272] As an example, the user equipment may be a mobile terminal, and the mobile terminal may be a mobile phone, an iPad, a computer, a watch, or a ring; the user equipment may also be a wearable device, and the wearable device may be a watch, a ring, shoes, a hat, clothing, glasses, etc.; the user equipment may also be an aircraft; the user equipment may also be a vehicle-mounted terminal; the user equipment may also be a ship-mounted terminal; the user equipment may also be an Internet of Things terminal; the user equipment may also be a terminal of an industrial Internet of Things; the user equipment may also be a test device; the user equipment may also be a signaling tester; the user equipment may also be an IAB (Integrated Access and Backhaul)-MT.

[0273] As an example, the base station equipment supports the transmission in a non-terrestrial network.

[0274] As an example, the base station equipment supports the transmission of a terrestrial network.

[0275] As an example, the base station equipment includes a Base Transceiver Station (BTS).

[0276] As an example, the base station equipment includes a Node B (NB); the Node B may be a gNB, an eNB, an ng-eNB, or an en-gNB; the base station equipment may include a Centralized Unit (CU); the base station equipment may also include a Distributed Unit (DU); the base station equipment may also include a Transmitter Receiver Point (TRP).

[0277] As an example, the base station device may be a macro cellular base station, a micro cell base station, a pico cell base station, or a femtocell; the base station device may also be an airborne platform device or a satellite device; the base station device may also be a test device or a signaling tester; the base station device may also be a gateway device; the base station device may also be an IAB device; the IAB device includes at least one of an IAB-node, an IAB-donor, an IAB-donor-CU, an IAB-donor-DU, an IAB-DU, or an IAB-MT.

[0278] As an example, the relay device may include a relay; the relay may be an L3 relay or an L2 relay; the relay device may also include a router; the relay device may also include a switch; the relay device may also include a gateway device; the relay device may also include at least a part of a user equipment; the relay device may also include at least a part of a base station device.

[0279] Example 3

[0280] 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 follows. 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 3The radio protocol architecture for controlling plane 300 is shown 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 in this text. Layer 2 (L2 layer) 305 is above PHY301 and includes a MAC (Medium Access Control) sub-layer 302, an RLC (Radio Link Control) sub-layer 303, and a PDCP (Packet Data Convergence Protocol) sub-layer 304. The PDCP sub-layer 304 provides multiplexing between different radio bearers and logical channels. The PDCP sub-layer 304 also provides security by encrypting data packets and provides handover support. The RLC sub-layer 303 provides segmentation and reassembly of upper layer data packets, retransmission of lost data packets, and reordering of data packets to compensate for disordered reception due to HARQ (Hybrid Automatic Repeat Request). The MAC sub-layer 302 provides multiplexing between logical and transport channels. The MAC sub-layer 302 is also responsible for allocating various radio resources (e.g., resource blocks) in a cell. The MAC sub-layer 302 is also responsible for HARQ operations. The RRC (Radio Resource Control) sub-layer 306 in Layer 3 (L3 layer) of the control plane 300 is responsible for obtaining radio resources (i.e., radio bearers) and configuring the 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 for the physical layer 351, the PDCP sub-layer 354 in the L2 layer 355, the RLC sub-layer 353 in the L2 layer 355, and the MAC sub-layer 352 in the L2 layer 355 is generally the same as the corresponding layers and sub-layers in the control plane 300, but the PDCP sub-layer 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) sub-layer 356, and the SDAP sub-layer 356 is responsible for mapping between QoS flows and data radio bearers (DRBs, Data Radio Bearer) to support service diversity.

[0281] As an example, the Figure 3 radio protocol architecture in is applicable to the terminal described in this application.

[0282] As an example, the Figure 3The wireless protocol architecture in [reference] is applicable to the base station in this application.

[0283] As an example, the first RRC message in this application is generated by the RRC 306.

[0284] As an example, the first signaling in this application is generated by the RRC 306.

[0285] As an example, the first signaling in this application is generated by the MAC 302 or MAC 352.

[0286] As an example, the first signaling in this application is generated by the PHY 301 or PHY 351.

[0287] As an example, the second signaling in this application is generated by the RRC 306.

[0288] As an example, the second signaling in this application is generated by the MAC 302 or MAC 352.

[0289] As an example, the second signaling in this application is generated by the PHY 301 or PHY 351.

[0290] As an example, the first DCI in this application is generated by the PHY 301 or PHY 351.

[0291] As an example, the first Preamble in this application is generated by the PHY 301 or PHY 351.

[0292] Example 4

[0293] Embodiment 4 shows a schematic diagram of a first communication device and a second communication device according to this application, as shown in the appendix Figure 4 as shown. Figure 4 It 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.

[0294] The first communication device 450 includes a controller / processor 459, a memory 460, a data source 467, a transmit processor 468, a receive processor 456, a multi-antenna transmit processor 457, a multi-antenna receive processor 458, a transmitter / receiver 454, and an antenna 452.

[0295] The second communication device 410 includes a controller / processor 475, a memory 476, a receive processor 470, a transmit processor 416, a multi-antenna receive processor 472, a multi-antenna transmit processor 471, a transmitter / receiver 418, and an antenna 420.

[0296] In the transmission from the second communication device 410 to the first communication device 450, at the second communication device 410, the 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 space 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.

[0297] 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 through 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 implement 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 stream 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 implements the functions of the L2 layer. The controller / processor 459 may be associated with a memory 460 that stores program code and data. The memory 460 may be referred to as a computer-readable medium. In the transmission from the second communication device 410 to the first 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.

[0298] 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 transmit 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 retransmitting 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 passing through 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.

[0299] In the transmission from the first communication device 450 to the second communication device 410, the functions at the second communication device 410 are similar to the receive 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 radio frequency signals through its corresponding antenna 420, converts the received radio frequency signals into baseband signals, and provides the baseband signals 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.

[0300] As an embodiment, the first communication device 450 includes: at least one processor and at least one memory, the at least one memory including computer program code; the at least one memory and the computer program code are configured to be used with the at least one processor, and the first communication device 450 is at least configured to: receive a first RRC message; wherein the first RRC message includes configuration information of a first candidate cell and a first threshold; receive a first DCI; wherein the first DCI indicates a first preamble of the first candidate cell; whether to send the first preamble on the first candidate cell depends on measurements for the first candidate cell; the whether to send the first preamble on the first candidate cell depends on measurements for the first candidate cell includes: when at least a first measurement result of the first candidate cell is greater than the first threshold, sending the first preamble on the first candidate cell.

[0301] As an embodiment, the first communication device 450 includes: a memory storing a computer-readable instruction program, the computer-readable instruction program generating actions when executed by at least one processor, the actions including: receiving a first RRC message; wherein the first RRC message includes configuration information of a first candidate cell and a first threshold; receiving a first DCI; wherein the first DCI indicates a first preamble of the first candidate cell; whether to send the first preamble on the first candidate cell depends on measurements for the first candidate cell; the whether to send the first preamble on the first candidate cell depends on measurements for the first candidate cell includes: when at least a first measurement result of the first candidate cell is greater than the first threshold, sending the first preamble on the first candidate cell.

[0302] 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; wherein, the first RRC message includes configuration information of a first candidate cell and a first threshold; send a first DCI; wherein, the first DCI indicates a first preamble of the first candidate cell; whether the recipient of the first DCI sends the first preamble on the first candidate cell depends on measurements for the first candidate cell; the whether of sending the first preamble on the first candidate cell depending on measurements for the first candidate cell includes: when at least a first measurement result of the first candidate cell is greater than the first threshold, sending the first preamble on the first candidate cell.

[0303] 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; wherein, the first RRC message includes configuration information of a first candidate cell and a first threshold; sending a first DCI; wherein, the first DCI indicates a first preamble of the first candidate cell; whether the recipient of the first DCI sends the first preamble on the first candidate cell depends on measurements for the first candidate cell; the whether of sending the first preamble on the first candidate cell depending on measurements for the first candidate cell includes: when at least a first measurement result of the first candidate cell is greater than the first threshold, sending the first preamble on the first candidate cell.

[0304] 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.

[0305] 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.

[0306] 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 DCI.

[0307] As an example, at least one of the antenna 420, the transmitter 418, the transmit processor 416, and the controller / processor 475 is used to transmit the first DCI.

[0308] As an example, at least one of the antenna 420, the receiver 418, the receive processor 470, and the controller / processor 475 is used to receive the first signaling.

[0309] As an example, at least one of the antenna 452, the transmitter 454, the transmit processor 468, and the controller / processor 459 is used to transmit the first signaling.

[0310] As an example, at least one of the antenna 420, the receiver 418, the receive processor 470, and the controller / processor 475 is used to receive the second signaling.

[0311] As an example, at least one of the antenna 452, the transmitter 454, the transmit processor 468, and the controller / processor 459 is used to transmit the second signaling.

[0312] As an example, at least one of the antenna 420, the receiver 418, the receive processor 470, and the controller / processor 475 is used to receive the first Preamble.

[0313] As an example, at least one of the antenna 452, the transmitter 454, the transmit processor 468, and the controller / processor 459 is used to transmit the first Preamble.

[0314] As an example, the first communication device 450 corresponds to the terminal in the present application.

[0315] As an example, the second communication device 410 corresponds to the base station in the present application.

[0316] As an example, the first communication device 450 is a user equipment.

[0317] As an example, the first communication device 450 is a base station equipment.

[0318] As an example, the first communication device 450 is a relay device.

[0319] As an example, the second communication device 410 is a user equipment.

[0320] As an embodiment, the second communication device 410 is a base station device.

[0321] As an embodiment, the second communication device 410 is a relay device.

[0322] Example 5

[0323] Embodiment 5 exemplifies a wireless signal transmission flowchart according to an embodiment of the present application, as shown in the appendix Figure 5 It should be specifically noted that the order in this example does not limit the signal transmission order and implementation order in the present application.

[0324] For the terminal U01:

[0325] In step S5101, receive the first RRC message; wherein, the first RRC message includes the configuration information of the first candidate cell and the first threshold;

[0326] In step S5102, send the second signaling;

[0327] In step S5103, receive the first DCI; wherein, the first DCI indicates the first preamble of the first candidate cell;

[0328] In step S5104, as a response to the reception of the first DCI, initiate the first random access procedure;

[0329] In step S5105, when at least the first measurement result of the first candidate cell is greater than the first threshold, initiate the first random access procedure.

[0330] In step S5106, send the first signaling on the first serving cell;

[0331] For the base station N02:

[0332] In step S5201, send the first RRC message;

[0333] In step S5202, receive the second signaling;

[0334] In step S5203, send the first DCI;

[0335] In step S5204, receive the first signaling;

[0336] In Embodiment 5, whether to send the first Preamble on the first candidate cell depends on the measurement of the first candidate cell; whether to send the first Preamble on the first candidate cell depends on the measurement of the first candidate cell, including sending the first Preamble on the first candidate cell when at least the first measurement result of the first candidate cell is greater than the first threshold; the first measurement result of the first candidate cell being less than the first threshold triggers the first signaling; the first candidate cell is a candidate cell of the first serving cell; whether to send the first Preamble on the first candidate cell is determined during the first random access procedure; the second signaling includes the second measurement result of the first candidate cell; the second signaling triggers the first DCI.

[0337] As an embodiment, there is a wireless connection between the terminal U01 and the base station N02.

[0338] As an embodiment, there is a wired connection between the terminal U01 and the base station N02.

[0339] As an embodiment, there is a Uu interface connection between the terminal U01 and the base station N02.

[0340] As an embodiment, there is an IAB interface connection between the terminal U01 and the base station N02.

[0341] As an embodiment, there is a PC5 interface connection between the terminal U01 and the base station N02.

[0342] As an embodiment, the dashed box F5.1 is optional.

[0343] As an embodiment, the dashed box F5.1 exists.

[0344] As an embodiment, the dashed box F5.1 does not exist.

[0345] As an embodiment, the dashed box F5.2 is optional.

[0346] As an embodiment, the dashed box F5.2 exists.

[0347] As an embodiment, the dashed box F5.2 does not exist.

[0348] As an embodiment, the dashed box F5.3 is optional.

[0349] As an embodiment, the dashed box F5.3 exists.

[0350] As an embodiment, the dashed box F5.3 does not exist.

[0351] As an embodiment, the dashed box F5.4 is optional.

[0352] As an embodiment, the dashed box F5.4 exists.

[0353] As an embodiment, the dashed box F5.4 does not exist.

[0354] As an embodiment, the dashed box F5.2 and the dashed box F5.3 do not exist simultaneously.

[0355] As an embodiment, the dashed box F5.2 and the dashed box F5.4 do not exist simultaneously.

[0356] As an embodiment, the dashed box F5.3 and the dashed box F5.4 do not exist simultaneously.

[0357] As an embodiment, the dashed box F5.2, the dashed box F5.3, and the dashed box F5.4 do not exist simultaneously.

[0358] As an embodiment, the first signaling is a UCI.

[0359] As an embodiment, the first signaling is a UCI sent on the PUCCH.

[0360] As an embodiment, the first signaling is a UCI sent on the PUSCH.

[0361] As an embodiment, the first signaling is a MAC CE.

[0362] As an embodiment, the first signaling is sent on the PUSCH.

[0363] As an embodiment, the first signaling is an RRC message.

[0364] As an embodiment, that the first measurement result of the first candidate cell is less than the first threshold triggers the first signaling means that, in response to the first measurement result of the first candidate cell being less than the first threshold, the first signaling is sent on the first serving cell.

[0365] As an embodiment, in response to the measurement result of the first candidate cell being less than the first threshold, the first preamble is not sent; in response to not sending the first preamble, the first signaling is sent on the first serving cell.

[0366] As an example, in response to the measurement result of the first candidate cell being less than the first threshold, initiate the first random access procedure; in response to not initiating the first random access procedure, send the first signaling on the first serving cell.

[0367] As an example, the first signaling indicates the first candidate cell.

[0368] As an example, the first signaling indicates the first preamble.

[0369] As an example, the first signaling indicates the RA-RNTI corresponding to the transmission of the first preamble.

[0370] As an example, the first signaling indicates the first measurement result.

[0371] As an example, the first signaling is scrambled with the first UE identifier.

[0372] As an example, the first UE identifier is the C-RNTI of the terminal in the first serving cell.

[0373] As an example, the first DCI triggers a first timer.

[0374] As an example, the first timer is maintained by the base station.

[0375] As an example, in response to sending the first DCI, start or restart the first timer.

[0376] As an example, in response to the expiration of the first timer, retransmit the first DCI.

[0377] As an example, in response to successfully receiving the first signaling, stop the first timer.

[0378] As an example, in response to successfully obtaining the effective timing advance of the terminal on the first candidate cell, stop the first timer.

[0379] As an example, the first timer is implemented by the base station.

[0380] As an example, the first timer is maintained by the terminal.

[0381] As an example, in response to successfully receiving the first DCI, start or restart the first timer.

[0382] As an example, the first signaling depends on the first timer.

[0383] As an embodiment, the transmission of the first signaling depends on the first timer being running.

[0384] As an embodiment, as a response to successfully receiving the first DCI and not transmitting the first preamble on the first candidate cell, when the first timer is running, the transmission of the first signaling is allowed.

[0385] As an embodiment, as a response to successfully receiving the first DCI and not transmitting the first preamble on the first candidate cell, when the first timer is not running, the first signaling is not transmitted.

[0386] As an embodiment, as a response to successfully transmitting the first preamble, the first timer is stopped.

[0387] As an embodiment, the first timer is implemented by the terminal.

[0388] As an embodiment, as a response to the first timer being running and the first measurement result of the first candidate cell being less than the first threshold, the first signaling is transmitted.

[0389] As an embodiment, as a response to the first timer being running and the first measurement result of the first candidate cell not being less than the first threshold, the first signaling is not transmitted.

[0390] As an embodiment, as a response to the first timer not being running, the first signaling is not transmitted.

[0391] As an embodiment, the first timer not being running includes the expiration of the first timer.

[0392] As an embodiment, the first timer not being running includes the stop of the first timer.

[0393] As an embodiment, the transmission of the first signaling depends on the uplink resources of the first serving cell.

[0394] As an embodiment, the uplink resources of the first serving cell are configured by the first RRC message.

[0395] As an embodiment, the uplink resources of the first serving cell are configured UL Grant.

[0396] As an embodiment, the uplink resources of the first serving cell are dynamic UL Grant.

[0397] As an embodiment, the uplink resources of the first serving cell refer to the available uplink resources of the first serving cell.

[0398] As an embodiment, the uplink resources of the first serving cell refer to the uplink resources in the first serving cell during the running of the first timer.

[0399] As an embodiment, when the first timer is running and there are no available uplink resources on the first serving cell, initiate the first buffer status report procedure.

[0400] As an embodiment, when the first timer is running and there are no available uplink resources on the first serving cell, initiate the first scheduling request procedure.

[0401] As an embodiment, the first scheduling request procedure is for the transmission of the first signaling.

[0402] As an embodiment, the first scheduling request procedure depends on scheduling request resources.

[0403] As an embodiment, the scheduling request resources are configured by the first RRC message.

[0404] As an embodiment, the first scheduling request procedure includes a random access procedure.

[0405] As an embodiment, the random access procedure is a CBRA procedure.

[0406] As an embodiment, the random access procedure is a CFRA procedure.

[0407] As an embodiment, the random access procedure is not the first random access procedure.

[0408] As an embodiment, the first random access procedure is a four-step random access procedure.

[0409] As an embodiment, the first random access procedure is a contention-free random access procedure.

[0410] As an embodiment, the first random access procedure is for an early uplink synchronization procedure for the first candidate cell.

[0411] As an embodiment, the first random access procedure is a random access procedure for the first candidate cell.

[0412] As an embodiment, the first random access procedure includes determining whether to transmit the first preamble on the first candidate cell.

[0413] As an embodiment, the first random process includes transmitting the first preamble on the first candidate cell.

[0414] As an embodiment, the first random process includes not transmitting the first preamble on the first candidate cell.

[0415] As an embodiment, when it is determined that the first random access process includes transmitting the first preamble on the first candidate cell, in response to transmitting the first preamble on the first candidate cell, the first random access process is considered completed.

[0416] As an embodiment, when it is determined that the first random access process does not include transmitting the first preamble on the first candidate cell, in response to determining that the first random process does not include transmitting the first preamble on the first candidate cell, the first random access process is considered completed.

[0417] As an embodiment, when it is determined that the first random access process does not include transmitting the first preamble on the first candidate cell, in response to determining that the first random process does not include transmitting the first preamble on the first candidate cell and successfully transmitting the first signaling, the first random access process is considered completed.

[0418] As an embodiment, the first random process includes receiving a first random access response.

[0419] As an embodiment, the first random access response is received on the first candidate cell.

[0420] As an embodiment, the first random access response is received on the first serving cell.

[0421] As an embodiment, a RAPID field is included in the MAC sub-header of the first random access response, indicating the preamble index value corresponding to the first preamble.

[0422] As an embodiment, the first random access response is CRC scrambled using the RA-RNTI corresponding to the transmission of the first preamble.

[0423] As an embodiment, the first random access response is CRC scrambled using the C-RNTI of the terminal under the first serving cell.

[0424] As an embodiment, the first random access response includes the timing advance of the terminal for the first candidate cell.

[0425] As an embodiment, when it is determined that the first random access procedure includes transmitting the first preamble on the first candidate cell, in response to successfully receiving the first random access response, the first random access procedure is considered completed.

[0426] As an embodiment, whether to transmit the first preamble on the first candidate cell is determined in the random access resource selection phase of the first random access procedure.

[0427] As an embodiment, the random access resource selection phase of the first random access procedure depends on the first measurement result and the first threshold.

[0428] As an embodiment, in response to the first measurement result of the first candidate cell being less than the first threshold, it is determined not to transmit the first preamble on the first candidate cell.

[0429] As an embodiment, in response to the first measurement result of the first candidate cell being not less than the first threshold, it is determined to transmit the first preamble on the first candidate cell.

[0430] As an embodiment, in response to the first measurement result of the first candidate cell being less than the first threshold, it is determined that the first random access procedure does not include transmitting the first preamble on the first candidate cell.

[0431] As an embodiment, in response to the first measurement result of the first candidate cell being not less than the first threshold, it is determined that the first random access procedure includes transmitting the first preamble on the first candidate cell.

[0432] As an embodiment, the second signaling is the first signaling.

[0433] As an embodiment, the second signaling is not the first signaling.

[0434] As an embodiment, the second signaling is a partial sub - domain of the first signaling.

[0435] As an embodiment, the first signaling is a partial sub - domain of the second signaling.

[0436] As an embodiment, the second signaling is a measurement report.

[0437] As an example, the second signaling is an L1 measurement report.

[0438] As an example, the second signaling is for Layer 1 / Layer 2 Triggered Mobility (LTM).

[0439] As an example, the second signaling is for early uplink synchronization.

[0440] As an example, the second signaling is a UCI.

[0441] As an example, the second signaling is a MAC CE.

[0442] As an example, the second signaling is an RRC message.

[0443] As an example, the second signaling is a CSI report.

[0444] As an example, the second signaling depends on a third signaling; the third signaling indicates the transmission of the second signaling; the third signaling is not the first RRC message.

[0445] As an example, the third signaling is an SP CSI reporting on PUCCH Activation / Deactivation MAC CE.

[0446] As an example, the third signaling is a DCI; the third signaling indicates the time-frequency resources for transmitting the second signaling.

[0447] As an example, the second measurement result of the first candidate cell includes: the measurement result of the first reference signal resource.

[0448] As an example, the second measurement result depends on the measurement result of the first reference signal resource.

[0449] As an example, the second measurement result is a quantization result of the measurement result of the first reference signal resource.

[0450] As an example, the second signaling depends on the first RRC message.

[0451] As an example, the second signaling depends on an LTM-CSI-ReportConfig field in the first RRC message.

[0452] As an example, the second measurement result is the same as the first measurement result.

[0453] As an example, the second measurement result is different from the first measurement result.

[0454] As an example, the second measurement result includes at least the measurement result of the first reference signal resource.

[0455] As an example, the second measurement result is not filtered.

[0456] As an example, the second measurement result is filtered.

[0457] As an example, the second measurement result is filtered by layer 1.

[0458] As an example, the second measurement result is filtered by layer 3.

[0459] As an example, the second measurement result includes cell-level quality.

[0460] As an example, the second measurement result is beam-level quality.

[0461] As an example, the second signaling triggers the first DCI, which means: in response to sending the second signaling, listen for the first DCI.

[0462] As an example, the second signaling triggers the first DCI, which means: the second signaling is for the early uplink synchronization; the first DCI triggers the early uplink synchronization.

[0463] As an example, the second signaling triggers the first DCI, which means: the second signaling is for at least one of the early uplink synchronization and the LTM cell handover; the first DCI triggers the early uplink synchronization.

[0464] As an example, the second measurement result includes the measurement result for the first reference signal resource.

[0465] As an example, the first DCI indicates the first reference signal resource.

[0466] As an example, the second signaling triggers the first DCI, which means: in response to the second measurement result including the measurement result for the first reference signal resource, the first DCI indicates the first reference signal resource.

[0467] As an example, the first RRC message configures the second signaling.

[0468] As an example, the first RRC signaling configures the reporting method of the second signaling.

[0469] As a sub - embodiment of the above - mentioned embodiment, the first RRC message configures the second signaling for periodic reporting.

[0470] As a sub - embodiment of the above - mentioned embodiment, the first RRC message configures the second signaling for semi - static reporting.

[0471] As a sub - embodiment of the above - mentioned embodiment, the first RRC message configures the second signaling for aperiodic reporting.

[0472] As a sub - embodiment of the above - mentioned embodiment, the first RRC message configures the second signaling for semi - static reporting.

[0473] As a sub - embodiment of the above - mentioned embodiment, in response to receiving the third signaling, the second signaling is sent; the third signaling indicates the uplink resource for sending the second signaling.

[0474] As an accessory embodiment of the above - mentioned sub - embodiment, the third signaling is a DCI format 0_1.

[0475] As an accessory embodiment of the above - mentioned sub - embodiment, the third signaling is a DCI format 0_2.

[0476] As an accessory embodiment of the above - mentioned sub - embodiment, the second signaling is semi - static reporting on the PUCCH.

[0477] As an accessory embodiment of the above - mentioned sub - embodiment, the second signaling is semi - static reporting on the PUSCH.

[0478] As an accessory embodiment of the above - mentioned sub - embodiment, the third signaling cancels or activates the periodic transmission of the second signaling.

[0479] As an embodiment, the second signaling is event - triggered.

[0480] As an embodiment, the event that triggers the second signaling is configured by the first RRC message.

[0481] As an embodiment, the EventTriggerConfig field in the first RRC message configures the triggering condition of the second event.

[0482] As an embodiment, the triggering of the second signaling depends on at least the measurement for the first candidate cell.

[0483] Example 6

[0484] Example 6 illustrates a schematic diagram of the relationship between a first DCI, a first threshold, and a first measurement result according to an embodiment of the present application, as shown in the appendix Figure 6 as shown.

[0485] In Example 6, whether to send the first preamble on the first candidate cell depends on the measurement for the first candidate cell, including: as a response to receiving the first DCI, whether to initiate a first random access procedure depends on the measurement for the first candidate cell, and the first random access procedure includes sending the first preamble on the first candidate cell; wherein, whether to initiate the first random access procedure depends on the measurement for the first candidate cell, including:

[0486] When at least the first measurement result of the first candidate cell is greater than the first threshold, initiate the first random access procedure.

[0487] As an embodiment, when the first measurement result of the first candidate cell is less than the first threshold, do not initiate the first random access procedure.

[0488] As an embodiment, when the first measurement result of the first candidate cell is equal to the first threshold, initiate the first random access procedure.

[0489] As an embodiment, when the first measurement result of the first candidate cell is equal to the first threshold, do not initiate the first random access procedure.

[0490] As an embodiment, when the first measurement result of the first candidate cell is greater than the first threshold, initiate the first random access procedure.

[0491] As an embodiment, initiating the first random access procedure means: triggering and initializing the first random access procedure.

[0492] As an embodiment, not initiating the first random access procedure means: triggering but not initializing the first random access procedure.

[0493] As an embodiment, initiating the first random access procedure means: triggering the first random access procedure.

[0494] As an embodiment, not initiating the first random access procedure means: not triggering the first random access procedure.

[0495] As an example, when the first measurement result of at least the first candidate cell is greater than the first threshold, initiating the first random access procedure includes: the first measurement result of the first candidate cell being greater than the first threshold triggers the initiation of the first random access procedure.

[0496] As an example, in response to receiving the first DCI, start or restart the first timer.

[0497] As an example, in response to the first timer being running, determine whether to initiate the first random access procedure.

[0498] As an example, in response to initiating the first random access procedure, stop the first timer.

[0499] As an example, in response to initiating the first random access procedure, consider the first timer to have timed out.

[0500] As an example, in response to the first timer not being running, do not initiate the first random access procedure.

[0501] As an example, the length of the first timer is pre-configured.

[0502] As an example, the length of the first timer is configured by the first RRC message.

[0503] As an example, when the first timer is running and the first measurement result of the first candidate cell is less than the first threshold, do not initiate the first random access procedure.

[0504] As an example, when the first timer is running and the first measurement result of the first candidate cell is equal to the first threshold, initiate the first random access procedure.

[0505] As an example, when the first timer is running and the first measurement result of the first candidate cell is equal to the first threshold, do not initiate the first random access procedure.

[0506] As an example, when the first timer is running and the first measurement result of the first candidate cell is greater than the first threshold, initiate the first random access procedure.

[0507] Example 7

[0508] Embodiment 7 exemplifies a schematic diagram of a first reference signal resource according to an embodiment of the present application, as shown in the appendix Figure 7 as shown.

[0509] In Embodiment 7, the first DCI indicates a first reference signal resource of the first candidate cell; the first measurement result of the first candidate cell includes: a measurement result of the first reference signal resource.

[0510] As an embodiment, the first RRC message indicates the first reference signal resource.

[0511] As an embodiment, the first measurement result of the first candidate cell is a measurement result of the first reference signal resource.

[0512] As an embodiment, the measurement result of the first reference signal resource is filtered.

[0513] As an embodiment, the measurement result of the first reference signal resource is L1-filtered.

[0514] As an embodiment, the measurement result of the first reference signal resource is L3-filtered.

[0515] As an embodiment, the measurement result of the first reference signal resource is unfiltered.

[0516] As an embodiment, the measurement result of the first reference signal resource is an L1 measurement result of the first reference signal resource.

[0517] As an embodiment, the measurement result of the first reference signal resource is an rsrp-ThresholdSSB of the first reference signal resource; the first reference signal resource is an SSB.

[0518] As an embodiment, the measurement result of the first reference signal resource is an rsrp-ThresholdCSI-RS of the first reference signal resource; the first reference signal resource is a CSI-RS.

[0519] As an embodiment, the first threshold is an rsrp-ThresholdSSB; the measurement result of the first reference signal resource is an SS-RSRP; the first reference signal resource is an SSB.

[0520] As an embodiment, the first threshold is an rsrp-ThresholdCSI-RS; the measurement result of the first reference signal resource is a CSI-RSRP; the first reference signal resource is a CSI-RS.

[0521] As an embodiment, the first reference signal resource is a reference signal resource in a reference signal resource configuration.

[0522] As an embodiment, the reference signal resource configuration is the reference signal resource configuration of the first candidate cell.

[0523] As an embodiment, the reference signal resource configuration is configured by the first RRC message.

[0524] As an embodiment, obtaining the reference signal resource configuration depends on downlink synchronization for the first candidate cell.

[0525] As an embodiment, the downlink synchronization for the first candidate cell includes receiving a first information block.

[0526] As an embodiment, the first information block includes the MIB of the first candidate cell.

[0527] As an embodiment, the first information block includes SIB1 of the first candidate cell.

[0528] As an embodiment, receiving the first information block means receiving the first information block on the first candidate cell.

[0529] As an embodiment, the measurement result of the first reference signal resource is cell - level quality (cellquantity).

[0530] As an embodiment, the measurement result of the first reference signal resource means: the cell - level measurement result including the first reference signal resource.

[0531] As an embodiment, the measurement result of the first reference signal resource is beam - consolidated.

[0532] As an embodiment, the measurement result of the first reference signal resource is beam - level quality.

[0533] As an embodiment, the measurement result of the first reference signal resource is beam - filtered.

[0534] As an embodiment, the first measurement result of the first candidate cell includes the measurement result of a first reference signal resource set.

[0535] As an embodiment, the first reference signal resource set is a set of reference signals of one or more of the first candidate cells.

[0536] As an embodiment, the first reference signal resource set includes the first reference signal resource.

[0537] As an embodiment, the first reference signal resource set is pre-configured.

[0538] As an embodiment, the first reference signal resource set is configured by the first RRC message.

[0539] As an embodiment, the measurement result of the first reference signal resource set depends on the measurement results of one or more reference signals of the first candidate cell.

[0540] As an embodiment, the measurement result of the first reference signal resource set depends on at least the measurement result of the first reference signal resource.

[0541] As an embodiment, the measurement result of the first reference signal resource set is the measurement result of the reference signal resource with the best measurement result in the first reference signal resource set.

[0542] As an embodiment, the measurement result of the first reference signal resource set is the measurement result of the reference signal resource with the worst measurement result in the first reference signal resource set.

[0543] As an embodiment, the measurement result of the first reference signal resource set is the measurement result of the reference signal resource with the median measurement result in the first reference signal resource set.

[0544] As an embodiment, the measurement result of the first reference signal resource set is the average value of the measurement results of all reference signal resources in the first reference signal resource set.

[0545] As an embodiment, the measurement result of the first reference signal resource set is the best one among the measurement results of all reference signal resources in the first reference signal resource set.

[0546] As an embodiment, the measurement result of the first reference signal resource set is the worst one among the measurement results of all reference signal resources in the first reference signal resource set.

[0547] As an embodiment, the measurement result of the first reference signal resource set is the median among the measurement results of all reference signal resources in the first reference signal resource set.

[0548] Example 8

[0549] Embodiment 8 exemplifies a schematic diagram of the first time window according to an embodiment of the present application, as shown in the appendix Figure 8 as follows.

[0550] In Embodiment 8, whether to send the first Preamble on the first candidate cell depends on the measurement for the first candidate cell only when the first time window is running; wherein, the start time of the first time window depends on the first DCI.

[0551] As an embodiment, the first time window is the first timer.

[0552] As an embodiment, when the first time window is not running, the first Preamble is not sent on the first candidate cell.

[0553] As a sub - embodiment of the above - mentioned embodiment, not sending the first Preamble on the first candidate cell means: not sending the first Preamble as a response to receiving the first DCI.

[0554] As an embodiment, when the first time window is not running, the first Preamble is sent on the first candidate cell as a response to receiving the first DCI.

[0555] As an embodiment, the start time of the first time window depends on the first DCI means: starting or restarting the first time window as a response to successfully receiving the first DCI.

[0556] As an embodiment, the start time of the first time window depends on the first DCI means: the start time of the first time window is the moment of successfully receiving the first DCI.

[0557] As an embodiment, the length of the first time window is pre - configured.

[0558] As an embodiment, the length of the first time window is configured by the first RRC message.

[0559] As an embodiment, the length of the first time window is configured by the first DCI.

[0560] As an embodiment, the length of the first time window is predefined.

[0561] As an embodiment, the length of the first time window has a default value.

[0562] As an embodiment, the sending of the first signaling depends on the first time window.

[0563] As an embodiment, in response to the first time window being running, sending the first signaling is allowed; in response to the first time window not being running, the first signaling is not sent.

[0564] As an embodiment, a first domain is included in the first DCI, and the first time window depends on the first domain.

[0565] As an embodiment, whether to send the first Preamble on the first candidate cell depends on whether the measurement for the first candidate cell is valid and depends on the first domain.

[0566] As an embodiment, the first domain indicates the length of the first time window.

[0567] As an embodiment, the first domain indicates whether to determine whether to send the first Preamble on the first candidate cell according to the measurement for the first candidate cell.

[0568] As an embodiment, the first domain indicates that the length of the first time window is 0.

[0569] As a sub - embodiment of the above - mentioned embodiment, when the first domain indicates that the length of the first time window is 0, it indicates that whether to send the first Preamble on the first candidate cell depends on the invalidity of the measurement for the first candidate cell. As a response to receiving the first DCI, send the first Preamble on the first candidate cell according to the indication of the first DCI.

[0570] As an embodiment, the first domain indicates that the length of the first time window is not 0.

[0571] As a sub - embodiment of the above - mentioned embodiment, when the first domain indicates that the length of the first time window is not 0, it indicates that within the first time window, determine whether to send the first Preamble on the first candidate cell according to the measurement for the first candidate cell.

[0572] As an embodiment, the size of the first domain is 1 bit.

[0573] As an embodiment, when the value of the first domain is 0, it indicates that whether to send the first Preamble on the first candidate cell depends on the invalidity of the measurement for the first candidate cell. As a response to receiving the first DCI, send the first Preamble on the first candidate cell according to the indication of the first DCI.

[0574] As an embodiment, when the value of the first domain is 1, it indicates that within the first time window, determine whether to send the first Preamble on the first candidate cell according to the measurement for the first candidate cell.

[0575] As an embodiment, when the value of the first field is 1, it indicates that the determination of whether to send the first preamble on the first candidate cell depending on the measurement of the first candidate cell does not hold, and in response to receiving the first DCI, the first preamble is sent on the first candidate cell according to the indication of the first DCI.

[0576] As an embodiment, when the value of the first field is 0, it indicates that within the first time window, it is determined whether to send the first preamble on the first candidate cell according to the measurement of the first candidate cell.

[0577] Example 9

[0578] Embodiment 9 exemplifies a structural block diagram of a processing device in a terminal according to an embodiment of the present application; as shown in the attached Figure 9 as shown. In the attached Figure 9 In it, the terminal 900 includes a first transmitter 901 and a first processor 902.

[0579] The first processor 902 receives a first RRC message; wherein, the first RRC message includes configuration information of a first candidate cell and a first threshold;

[0580] The first processor 902 receives a first DCI; wherein, the first DCI indicates the first preamble of the first candidate cell;

[0581] In Embodiment 9, whether to send the first preamble on the first candidate cell depends on the measurement of the first candidate cell; the determination of whether to send the first preamble on the first candidate cell depending on the measurement of the first candidate cell includes:

[0582] When at least the first measurement result of the first candidate cell is greater than the first threshold, the first preamble is sent on the first candidate cell.

[0583] As an embodiment, the first processor 902 includes a first receiver.

[0584] As an embodiment, the first transmitter 901 sends a first signaling on a first serving cell; the first measurement result of the first candidate cell being less than the first threshold triggers the first signaling; the first candidate cell is a candidate cell of the first serving cell.

[0585] As an example, the first processor 902 initiates a first random access procedure in response to receiving the first DCI; whether to send the first preamble on the first candidate cell is determined during the first random access procedure.

[0586] As an example, whether to send the first preamble on the first candidate cell depending on the measurement for the first candidate cell includes: whether to initiate the first random access procedure depending on the measurement for the first candidate cell in response to receiving the first DCI, the first random access procedure including sending the first preamble on the first candidate cell; wherein, whether to initiate the first random access procedure depending on the measurement for the first candidate cell includes:

[0587] When at least the first measurement result of the first candidate cell is greater than the first threshold, initiate the first random access procedure.

[0588] As an example, the first DCI indicates a first reference signal resource of the first candidate cell; the first measurement result of the first candidate cell includes: the measurement result of the first reference signal resource.

[0589] As an example, the first transmitter 901 sends a second signaling; the second signaling includes a second measurement result of the first candidate cell; the second signaling triggers the first DCI.

[0590] As an example, only when the first time window is running, does whether to send the first preamble on the first candidate cell depending on the measurement for the first candidate cell hold; wherein, the start time of the first time window depends on the first DCI.

[0591] As an example, the first processor 902 receives a first RRC message; wherein, the first RRC message includes configuration information of the first candidate cell and a first time window; the first processor 902 receives a first DCI; wherein, the first DCI indicates the first preamble of the first candidate cell; whether to send the first preamble on the first candidate cell depends on whether the first time window is running; whether to send the first preamble on the first candidate cell depending on whether the first time window is running includes:

[0592] When at least the first time window is running, send the first preamble on the first candidate cell.

[0593] As an embodiment, the terminal includes: one or more processors and a memory; the memory is coupled to the one or more processors, and the memory is configured to store computer program code, the computer program code includes computer instructions, and the one or more processors call the computer instructions to cause the terminal to execute the method for a terminal in the present application.

[0594] As an embodiment, the first receiver includes at least one of the antenna 452 or the receiver 454 or the multi-antenna receiving processor 458 or the receiving processor 456 or the controller / processor 459 or the memory 460 or the data source 467 in the appendix of the present application. Figure 4

[0595] As an embodiment, the first receiver includes at least the antenna 452 and the receiver 454 in the appendix of the present application. Figure 4

[0596] As an embodiment, the first transmitter 901 includes at least one of the antenna 452 or the transmitter 454 or the multi-antenna transmitting processor 457 or the transmitting processor 468 or the controller / processor 459 or the memory 460 or the data source 467 in the appendix of the present application. Figure 4

[0597] As an embodiment, the first transmitter 901 includes at least the antenna 452 and the transmitter 454 in the appendix of the present application. Figure 4

[0598] Example 10

[0599] Embodiment 10 exemplifies a structural block diagram of a processing device for a base station according to an embodiment of the present application; as shown in the appendix. Figure 10 In the appendix, Figure 10 the base station 1000 includes a second transmitter 1001 and a second receiver 1002.

[0600] The second transmitter 1001 transmits a first RRC message; wherein, the first RRC message includes configuration information of a first candidate cell and a first threshold;

[0601] The second transmitter 1001 transmits a first DCI; wherein, the first DCI indicates a first preamble of the first candidate cell.

[0602] In Embodiment 10, whether the receiver of the first DCI sends the first Preamble on the first candidate cell depends on the measurement for the first candidate cell; whether to send the first Preamble on the first candidate cell depending on the measurement for the first candidate cell includes:

[0603] When at least the first measurement result of the first candidate cell is greater than the first threshold, send the first Preamble on the first candidate cell.

[0604] As an embodiment, the second receiver 1002 receives a first signaling on a first serving cell; the first measurement result of the first candidate cell being less than the first threshold triggers the first signaling; the first candidate cell is a candidate cell of the first serving cell.

[0605] As an embodiment, in response to receiving the first DCI, the receiver of the first DCI initiates a first random access procedure; wherein, whether to send the first Preamble on the first candidate cell is determined in the first random access procedure.

[0606] As an embodiment, whether to send the first Preamble on the first candidate cell depending on the measurement for the first candidate cell includes: in response to receiving the first DCI, whether the receiver of the first DCI initiates a first random access procedure depends on the measurement for the first candidate cell, the first random access procedure including sending the first Preamble on the first candidate cell; wherein, whether to initiate the first random access procedure depending on the measurement for the first candidate cell includes:

[0607] When at least the first measurement result of the first candidate cell is greater than the first threshold, initiate the first random access procedure.

[0608] As an embodiment, the first DCI indicates a first reference signal resource of the first candidate cell; the first measurement result of the first candidate cell includes: the measurement result of the first reference signal resource.

[0609] As an embodiment, the second receiver 1002 receives a second signaling; the second signaling includes a second measurement result of the first candidate cell; the second signaling triggers the first DCI.

[0610] As an example, whether to send the first preamble on the first candidate cell depends on the measurement for the first candidate cell only when the first time window is running; wherein, the start time of the first time window depends on the first DCI.

[0611] As an example, the second transmitter 1001 sends a first RRC message; wherein, the first RRC message includes configuration information of the first candidate cell and a first time window; the second transmitter 1001 sends a first DCI; wherein, the first DCI indicates the first preamble of the first candidate cell; whether to send the first preamble on the first candidate cell depends on whether the first time window is running; whether to send the first preamble on the first candidate cell depends on whether the first time window is running includes:

[0612] When at least the first time window is running, send the first preamble on the first candidate cell.

[0613] As an example, the base station includes: one or more processors and a memory; the memory is coupled to the one or more processors, the memory is used to store computer program code, the computer program code includes computer instructions, and the one or more processors call the computer instructions to enable the base station to execute the method for the base station in this application.

[0614] As an example, the second transmitter 1001 includes at least one of the antenna 420 or the transmitter 418 or the multi-antenna transmission processor 471 or the transmission processor 416 or the controller / processor 475 or the memory 476 in the appendix of this application. Figure 4

[0615] As an example, the second transmitter 1001 includes at least the antenna 420 and the transmitter 418 in the appendix of this application. Figure 4

[0616] As an example, the second receiver 1002 includes 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 in the appendix of this application. Figure 4

[0617] As an example, the second receiver 1002 includes at least the antenna 420 and the receiver 418 in the appendix of this application. Figure 4

[0618] As an example, in response to sending or retransmitting the first DCI, start or restart the first timer.

[0619] As an example, whether to retransmit the first DCI depends on the first timer.

[0620] As an example, whether to retransmit the first DCI depends on the first signaling.

[0621] As an example, whether to retransmit the first DCI depends on at least one of the first timer and the first signaling.

[0622] As an example, receiving the first signaling means: monitoring the first signaling.

[0623] As an example, in response to receiving the first signaling, retransmit the first DCI.

[0624] As an example, when the first timer is running, monitor the first signaling.

[0625] As an example, in response to receiving the timing advance of the terminal on the first candidate cell, stop the first timer.

[0626] As an example, in response to the expiration of the first timer, retransmit the first DCI.

[0627] As an example, in response to the first timer not being running, ignore the first signaling.

[0628] As an example, in response to the first timer not being running, do not retransmit the first DCI.

[0629] As an example, in response to the first timer not being running, do not receive the first signaling.

[0630] Example 11

[0631] Example 11 illustrates a flowchart according to an embodiment of the present application, as shown in the appendix Figure 11 shown. In the appendix Figure 11 Each box represents a step. It should be emphasized that the order of the boxes in the figure does not represent the temporal sequence of the steps represented.

[0632] For terminal U01:

[0633] In step S11101, receive the first RRC message; wherein, the first RRC message includes the configuration information of the first candidate cell and the first time window;

[0634] In step S11102, a first DCI is received; wherein, the first DCI indicates a first preamble of the first candidate cell.

[0635] In step S11103, when at least the first time window is running, the first preamble is transmitted on the first candidate cell.

[0636] For base station N02:

[0637] In step S11201, the first RRC message is transmitted.

[0638] In step S11202, the first DCI is transmitted.

[0639] In Embodiment 11, whether to transmit the first preamble on the first candidate cell depends on whether the first time window is running; whether to transmit the first preamble on the first candidate cell depends on whether the first time window is running includes:

[0640] When at least the first time window is running, the first preamble is transmitted on the first candidate cell.

[0641] As an embodiment, whether to transmit the first preamble on the first candidate cell depends on whether the first time window is running includes: when the first time window is running, the first preamble is transmitted on the first candidate cell; when the first time window is not running, the first preamble is not transmitted on the first candidate cell.

[0642] As an embodiment, the start time of the first time window depends on the first DCI.

[0643] As an embodiment, the start time of the first time window depends on the transmission of the previous preamble.

[0644] As an embodiment, the first time window is maintained by the terminal.

[0645] As an embodiment, the length of the first time window is pre-configured.

[0646] As an embodiment, whether to transmit the first preamble on the first candidate cell depends on a first measurement result.

[0647] As an embodiment, the first measurement result is a measurement result for the first candidate cell.

[0648] As an example, when the first measurement result is greater than the first threshold, the first Preamble is sent on the first candidate cell.

[0649] As an example, when the first measurement result is not greater than the first threshold, the first Preamble is not sent on the first candidate cell.

[0650] As an example, the first threshold is pre-configured.

[0651] As an example, whether to send the first Preamble on the first candidate cell depends on the first measurement result and the first time window.

[0652] As an example, whether to send the first Preamble on the first candidate cell depends on at least one of the first measurement result and the first time window.

[0653] As an example, whether to send the first Preamble on the first candidate cell depends on the first measurement result and the first time window includes: when the first time window is running and the first measurement result is greater than the first threshold, the first Preamble is sent on the first candidate cell; when the first time window is not running or the first measurement result is not greater than the first threshold, the first Preamble is not sent on the first candidate cell.

[0654] As an example, whether to send the first Preamble on the first candidate cell depends on the first measurement result and the first time window includes: when the first time window is running or the first measurement result is greater than the first threshold, the first Preamble is sent on the first candidate cell; when the first time window is not running and the first measurement result is not greater than the first threshold, the first Preamble is not sent on the first candidate cell.

[0655] Those of ordinary skill in the art can understand that all or part of the steps in the above method can be completed by instructing relevant hardware through a program, and the program can be stored in a computer-readable storage medium, such as a read-only memory, a hard disk, or an optical 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, unmanned aerial vehicles, communication modules on unmanned aerial vehicles, remote control aircraft, aircraft, small aircraft, mobile phones, tablet computers, laptops, 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.

[0656] 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 method used in a terminal, characterized in that: include: Receiving a first RRC message; wherein the first RRC message includes configuration information of a first candidate cell and a first threshold; Receive a first DCI; wherein the first DCI indicates a first preamble of the first candidate cell; Whether to send the first Preamble on the first candidate cell depends on the measurement of the first candidate cell; whether to send the first Preamble on the first candidate cell depends on the measurement of the first candidate cell includes: When at least the first measurement result of the first candidate cell is greater than the first threshold, the first Preamble is sent on the first candidate cell.

2. The method according to claim 1, characterized in that The method comprises: Sending a first signaling on a first serving cell; The first measurement result of the first candidate cell is less than the first threshold, triggering the first signaling; and the first candidate cell is a candidate cell of the first serving cell.

3. The method according to claim 1 or 2, characterized in that: The method comprises: Initiating a first random access procedure in response to receiving the first DCI; Whether to send the first Preamble on the first candidate cell is determined in the first random access process.

4. The method according to claim 1 or 2, characterized in that: Whether sending the first Preamble on the first candidate cell depends on measurement of the first candidate cell includes: as a response to the first DCI being received, whether initiating a first random access process depends on measurement of the first candidate cell, the first random access process including sending the first Preamble on the first candidate cell; wherein whether initiating the first random access process depends on measurement of the first candidate cell includes: When the first measurement result of at least the first candidate cell is greater than the first threshold, the first random access procedure is initiated.

5. The method according to any one of claims 1 to 4, characterized in that The first DCI indicates a first reference signal resource of the first candidate cell; and the first measurement result of the first candidate cell includes: a measurement result of the first reference signal resource.

6. The method according to claim 5, characterized in that The method comprises: Sending a second signaling; The second signaling includes a second measurement result of the first candidate cell; and the second signaling triggers the first DCI.

7. The method according to any one of claims 1 to 6, characterized in that Only when the first time window is running, whether to send the first Preamble on the first candidate cell depends on the measurement of the first candidate cell; wherein the start time of the first time window depends on the first DCI.

8. A terminal, characterized in that: The terminal includes: one or more processors and a memory; The memory is coupled to the one or more processors, and the memory is used to store computer program codes, where the computer program codes include computer instructions. The one or more processors call the computer instructions to enable the terminal to execute the method according to any one of claims 1 to 7.

9. A method used in a base station, characterized in that: include: Sending a first RRC message; wherein the first RRC message includes configuration information of the first candidate cell and a first threshold; Sending a first DCI; wherein the first DCI indicates a first Preamble of the first candidate cell; Whether the receiver of the first DCI sends the first Preamble on the first candidate cell depends on the measurement of the first candidate cell; whether the first Preamble is sent on the first candidate cell depends on the measurement of the first candidate cell includes: When at least the first measurement result of the first candidate cell is greater than the first threshold, the first Preamble is sent on the first candidate cell.

10. The method according to claim 9, characterized in that The method comprises: Receiving first signaling on a first serving cell; The first measurement result of the first candidate cell is less than the first threshold, triggering the first signaling; and the first candidate cell is a candidate cell of the first serving cell.

11. The method according to claim 9 or 10, characterized in that: In response to receiving the first DCI, the receiver of the first DCI initiates a first random access procedure; wherein whether to send the first Preamble on the first candidate cell is determined in the first random access procedure.

12. The method according to claim 9 or 10, characterized in that: Whether sending the first Preamble on the first candidate cell depends on measurement of the first candidate cell includes: as a response to the first DCI being received, whether the receiver of the first DCI initiates a first random access process that depends on measurement of the first candidate cell, the first random access process including sending the first Preamble on the first candidate cell; wherein whether initiating the first random access process that depends on measurement of the first candidate cell includes: When the first measurement result of at least the first candidate cell is greater than the first threshold, the first random access procedure is initiated.

13. The method according to any one of claims 9 to 12, characterized in that: The first DCI indicates a first reference signal resource of the first candidate cell; and the first measurement result of the first candidate cell includes: a measurement result of the first reference signal resource.

14. The method according to claim 13, characterized in that The method comprises: receiving a second signaling; The second signaling includes a second measurement result of the first candidate cell; and the second signaling triggers the first DCI.

15. The method according to any one of claims 9 to 14, characterized in that: Only when the first time window is running, whether to send the first Preamble on the first candidate cell depends on the measurement of the first candidate cell; wherein the start time of the first time window depends on the first DCI.

16. A base station, characterized in that: The base station includes: one or more processors and a memory; The memory is coupled to the one or more processors, and the memory is used to store computer program codes, where the computer program codes include computer instructions, and the one or more processors call the computer instructions to enable the base station to perform the method according to any one of claims 9 to 15.

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