Terminal, wireless communication method, and base station

Abstract

A terminal according to one aspect of the present disclosure is characterized by having: a reception unit that receives information which is used for determining a mobility state; and a control unit that determines the mobility state on the basis of said information, and if the terminal is in a specific mobility state, evaluates whether a condition of a specific event is satisfied, and executes specific processing if the condition of the specific event is satisfied. Due to this aspect of the present disclosure, appropriate processing can be executed according to the mobility state.

Description

Terminal, wireless communication method and base station

[0001] The present disclosure relates to a terminal, a wireless communication method, and a base station in a next-generation mobile communication system.

[0002] Long Term Evolution (LTE) has been specified for the Universal Mobile Telecommunications System (UMTS) network with the aim of achieving higher data rates and lower latency (Non-Patent Document 1). Also, LTE-Advanced (3GPP Rel. 10-14) has been specified with the aim of achieving higher capacity and more advanced features than LTE (Third Generation Partnership Project (3GPP (registered trademark)) Release (Rel.) 8, 9).

[0003] Successor systems to LTE (e.g., 5th generation mobile communication system (5G), 5G+ (plus), 6th generation mobile communication system (6G), New Radio (NR), 3GPP Rel. 15 or later, etc.) are also being considered.

[0004] 3GPP TS 36.300 V8.12.0 “Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage 2 (Release 8)”, April 2010

[0005] In a wireless communication system (e.g., NR), a terminal (user terminal, User Equipment (UE)) performs measurements / reports, etc. when a specific event occurs.

[0006] However, since existing events do not take mobility status into account, there is a risk that processing such as event trigger measurement / reporting will increase for terminals with high moving speeds, which may result in a decrease in communication throughput.

[0007] Therefore, one of the objects of the present disclosure is to provide a terminal, a wireless communication method, and a base station that can execute appropriate processing depending on the mobility state.

[0008] A terminal according to one aspect of the present disclosure is characterized by having a receiving unit that receives information used to determine a mobility state, and a control unit that determines a mobility state based on the information, determines whether a condition for a specific event is met when the terminal is in a specific mobility state, and executes a specific process when the condition for the specific event is met.

[0009] According to one aspect of the present disclosure, appropriate processing can be performed depending on the mobility state.

[0010] Fig. 1 is a diagram showing the MobilityStateParameters information element of Rel. 18. Fig. 2 is a diagram showing the SpeedStateScaleFactors information element of Rel. 18. Fig. 3 is a flowchart showing an example of execution of measurement / report / cell switch based on predicted values. Fig. 4 is a diagram showing an example of processing of a second embodiment. Fig. 5 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment. Fig. 6 is a diagram showing an example of a configuration of a base station according to an embodiment. Fig. 7 is a diagram showing an example of a configuration of a user terminal according to an embodiment. Fig. 8 is a diagram showing an example of hardware configurations of a base station and a user terminal according to an embodiment. Fig. 9 is a diagram showing an example of a vehicle according to an embodiment.

[0011] (Handover / Cell Reselection) In existing LTE systems (e.g., LTE Rel. 8-14), control procedures for mobility of user equipment (UE) (e.g., handover, cell reselection, etc.) are specified.

[0012] In a handover, when a user terminal is in a connected state (RRC_CONNECTED), the network (e.g., a radio base station (eNB: eNodeB)) initiates a switching of the serving cell based on measurement results of the serving cell and neighboring cells. The serving cell may be a cell to which the user terminal is connected. The neighboring cells may be cells that are candidates for connection of the user terminal.

[0013] On the other hand, in cell reselection, when a user terminal is in an idle state (RRC_IDLE), the user terminal takes the initiative to change the camped cell. The camped cell may be the cell in which the user terminal is located.

[0014] (Mobility State) In Rel. 18, one of the mobility states is used / set according to the following criteria.

[0015] Normal mobility condition criteria: T CRmax ) the number of cell reselections reaches a first predetermined number (N CR_M ) is applied.

[0016] Medium mobility condition criteria: T CRmax ) the number of cell reselections reaches a first predetermined number (N CR_M ) or more, a second predetermined number of times (N CR_H ) applies in the following cases:

[0017] High mobility state criteria: T CRmax ) the number of cell reselections reaches a second predetermined number (N CR_H ) is applied.

[0018] The UE shall not consider consecutive reselections of a cell in the mobility state detection criteria, such as when a cell is reselected once and then reselected again immediately after. If the UE supports a High Speed ​​Dedicated Network (HSDN) and cellEquivalentSize is configured, the UE shall count the number of cell reselections for this cell as the parameter (cellEquivalentSize) configured for this cell. Note that cellEquivalentSize is a parameter indicating the cell count number used for estimating the mobility state of this cell.

[0019] Figure 1 is a diagram showing the information element MobilityStateParameters of Rel. 18. The information element MobilityStateParameters includes parameters for determining the mobility state of a UE. t-Evaluation indicates the time for evaluating the criteria for entering a mobility state. t-HystNormal indicates the additional time for evaluating the criteria for entering a normal mobility state. n-CellChangeMedium indicates the number of cell changes required to enter a medium mobility state. n-CellChangeHigh indicates the number of cell changes required to enter a high mobility state. n-CellChangeMedium indicates the number of cell changes required to enter a first predetermined number of times (N CR_M ), and n-CellChangeHigh corresponds to the second predetermined number of times (N CR_H ) corresponds to

[0020] Figure 2 shows the Rel. 18 information element "SpeedStateScaleFactors." The information element "SpeedStateScaleFactors" relates to a coefficient used to scale mobility control-related parameters when the UE is in a medium or high speed state. sf-High indicates that the mobility control-related parameters are multiplied by this coefficient when the UE is in a high mobility state. The values ​​oDot25, oDot5, and oDot75 correspond to 0.25, 0.5, and 0.75, respectively. sf-Medium indicates that the mobility control-related parameters are multiplied by this coefficient when the UE is in a medium mobility state. The values ​​oDot25, oDot5, and oDot75 correspond to 0.25, 0.5, and 0.75, respectively.

[0021] (Events for L3 Measurement / Reporting) Some of the events for Radio Resource Management (RRM) reporting (L3 measurement / reporting) in Rel. 17 will be described below.

[0022] In addition, in Events A1 to A6, B1, and B2, the measurement result may be at least one measurement result of RSRP (L1-RSRP / L3-RSRP), RSRQ, and SINR (RS-SINR). In the conditions of Events A1 to A6, B1, and B2, "bad" may mean "low" and "good" may mean "high." In the conditions of Events A1 to A6, B1, and B2, SpCell means a special cell and may mean at least one of a Primary Cell (PCell) and a Primary Secondary Cell (PSCell). Each threshold may be the same or different.

[0023] Event A1: Event A1 indicates that the serving condition becomes better than a threshold. Specifically, the UE considers the entering condition of this event to be met when condition A1-1 specified below is met, and the leaving condition of this event to be met when condition A1-2 is met.

[0024] - Condition A1-1: Ms-Hys>Thresh - Condition A1-2: Ms+Hys<Thresh

[0025] The variables in the above formulas of Conditions A1-1 and A1-2 are defined as follows. - Ms is the measurement result of the serving cell, and the offset is not considered. - Hys is the hysteresis parameter of this event (i.e., the parameter (hysteresis) defined within the reporting configuration information (reportConfigNR) for this event). - Thresh is the threshold parameter of this event (i.e., the parameter (a1-Threshold) defined within the reporting configuration information (reportConfigNR) for this event). - The unit of Ms is dBm in the case of RSRP, and dB in the cases of RSRQ and RS-SINR. - Hys is expressed in dB. - The same unit as Ms is applied to Thresh.

[0026] <Event A2>Event A2 indicates that the serving (measurement result of the serving cell) becomes worse than the threshold. Specifically, the UE considers that the entry condition of this event is satisfied when Condition A2-1 defined below is met, and considers that the exit condition of this event is satisfied when A2-2 is met. The meaning of the variables in each condition is the same as those of the variables in A1 above.

[0027] - Condition A2-1: Ms+Hys<Thresh - Condition A2-2: Ms-Hys>Thresh

[0028] <Event A3>Event A3 indicates that, considering the offset, the adjacent (measurement result of the adjacent cell) becomes better than the SpCell. Specifically, the UE considers that the entry condition of this event is satisfied when Condition A3-1 defined below is met, and considers that the exit condition of this event is satisfied when A3-2 is met.

[0029] - Condition A3-1: Mn+Ofn+Ocn-Hys>Mp+Ofp+Ocp+Off - Condition A3-2: Mn+Ofn+Ocn+Hys<Mp+Ofp+Ocp+Off

[0030] The variables in the formulas of the above conditions A3-1 and A3-2 are defined as follows: Mn is the measurement result of the neighboring cell, without taking into account the offset; Ofn is the measurement object-specific offset of the reference signal of the neighboring cell (i.e., the parameter (offsetMO) defined in the configuration information (measObjectNR) corresponding to the neighboring cell); Ocn is the cell-specific offset of the neighboring cell (i.e., the parameter (cellIndividualOffset) defined in the configuration information (measObjectNR) corresponding to the frequency of the neighboring cell), and is set to zero if not configured for the neighboring cell; Mp is the measurement result of the SpCell, without taking into account the offset; Ofp is the measurement object-specific offset of the SpCell (the parameter (offsetMO) defined in the configuration information (measObjectNR) corresponding to the SpCell); Ocp is the cell-specific offset of the SpCell (the parameter (cellIndividualOffset) defined in the configuration information (measObjectNR) corresponding to the SpCell), and is set to zero if not configured for the SpCell. - Hys is the hysteresis parameter of this event (i.e., the parameter (hysteresis) defined in the configuration information (reportConfigNR) for this event). - Off is the offset parameter of this event (i.e., the parameter (a3-Offset) defined in the configuration (reportConfigNR) for this event). - The units of Mn and Mp for RSRP are dBm, and the units of RSRQ and RS-SINR are dB. - The units of Ofn, Ocn, Ofp, Ocp, Hys, and Off are dB.

[0031] Event A4: Event A4 indicates that the neighbor (measurement result of the neighbor cell) becomes better than a threshold. Specifically, the UE considers the enter condition of this event to be met when the following condition A4-1 is met, and the leave condition of this event to be met when A4-2 is met. The meanings of the variables in each condition are the same as those of Event A3 above.

[0032] - Condition A4-1: Mn + Ofn + Ocn - Hys > Thresh - Condition A4-2: Mn + Ofn + Ocn + Hys < Thresh

[0033] <Event A5> Event A5 indicates that SpCell (measurement result of SpCell) becomes worse than Threshold 1 and the adjacent (measurement result of adjacent cell) becomes better than Threshold 2. Specifically, when both of the following specified Conditions A5-1 and A5-2 are satisfied, the UE considers that the entry condition of this event is satisfied, and when at least one of Conditions A5-3 or A5-4 is satisfied, the UE considers that the exit condition of this event is satisfied. Thresh1 and Thresh2 are the thresholds of this event respectively. The unit of Thresh1 is the same as Mp, and the unit of Thresh2 is the same as Mn. The meanings of other variables are the same as those of the variables in the above Event A3.

[0034] - Condition A5-1: Mp + Hys < Thresh1 - Condition A5-2: Mn + Ofn + Ocn - Hys > Thresh2 - Condition A5-3: Mp - Hys > Thresh1 - Condition A5-4: Mn + Ofn + Ocn + Hys < Thresh2

[0035] <Event A6> Event A6 indicates that, considering the offset, the adjacent (measurement result of adjacent cell) becomes better than SCell (measurement result of SpCell). Specifically, when the following specified Condition A6-1 is satisfied, the UE considers that the entry condition of this event is satisfied, and when A6-2 is satisfied, the UE considers that the exit condition of this event is satisfied.

[0036] - Condition A6-1: Mn + Ocn - Hys > Ms + Ocs + Off - Condition A6-2: Mn + Ocn + Hys < Ms + Ocs + Off

[0037] In this measurement, the secondary cell (SCell) corresponding to the configuration (measObjectNR) related to this event is considered as the serving cell. Furthermore, both the neighbor cell reference signal and the SCell reference signal are indicated in the related configuration (measObjectNR). The variables in the formulas of the above conditions A6-1 and A6-2 are defined as follows. The meanings of the other variables are the same as those of the variables in the above event A3. Ms is the measurement result of the serving cell, and the offset is not taken into account. Ocs is the cell-specific offset of the serving cell (i.e., cellIndividualOffset defined in the related configuration (measObjectNR)), and is set to zero if not configured in the serving cell.

[0038] <Event B1> Event B1 indicates that the inter-Radio Access Technology (RAT) neighbor cell (measurement result of the neighbor cell) becomes better than a threshold. For example, if the RAT of the serving cell is LTE (or NR / 5G), the inter-RAT neighbor cell may be an NR / 5G (or LTE) cell. Specifically, the UE considers that the enter condition of this event is met when condition B1-1 specified below is met, and that the leave condition of this event is met when condition B1-2 is met.

[0039] ・Condition B1-1 Mn+Ofn+Ocn-Hys>Thresh ・Condition B1-2 Mn+Ofn+Ocn+Hys <Thresh

[0040] Mn is the measurement result of the inter-RAT neighbor cell without taking the offset into consideration. Ofn is the measurement target specific offset of the frequency of the inter-RAT neighbor cell (i.e., the parameter (utra-Q-OffsetRange) defined in the configuration information (measObjectEUTRA) corresponding to the frequency of the neighboring inter-RAT cell, and the parameter (utra-FDD-Q-OffsetRange) defined in the configuration information (measObjectUTRA-FDD) corresponding to the frequency of the neighboring inter-RAT cell). Ocn is the cell specific offset of the inter-RAT neighbor cell (i.e., the parameter (cellIndividualOffset) defined in the configuration information (measObjectEUTRA) corresponding to the neighboring inter-RAT cell), and is set to 0 if not configured for the neighbor cell. Hys is the hysteresis parameter of this event (i.e., the parameter (hysteresis) defined in the configuration information (reportConfigInterRAT) of this event). - Threshold indicates the threshold parameter of this event (i.e., the parameter (b1-ThresholdEUTRA) defined in the configuration information (reportConfigInterRAT) of this event or the parameter defined for UTRA-FDD (b1-ThresholdUTRA-FDD)). - The unit of Mn is dBm or dB depending on the measurement quantity of the inter-RAT neighboring cell. - The unit of Ofn, Ocn, and Hys is dB. - The same unit as Mn is used for Threshold.

[0041] <Event B2> Event B2 indicates that the PCell (measurement result of the PCell) becomes worse than threshold 1 and the inter-RAT neighboring cell (measurement result of the neighboring cell) becomes better than threshold 2. Specifically, the UE considers the enter condition of this event to be met when both conditions B2-1 and B2-2 specified below are met, and considers the leave condition of this event to be met when at least one of conditions B2-3 or B2-4 is met.

[0042] - Condition B2-1: Mp + Hys < Thresh1 - Condition B2-2: Mn + Ofn + Ocn - Hys > Thresh2 - Condition B2-3: Mp - Hys > Thresh1 - Condition B2-4: Mn + Ofn + Ocn + Hys < Thresh2

[0043] - Mp is the measurement result of PCell, and the offset is not considered. - Thresh1 and Thresh2 are the threshold values for this event respectively. The unit of Thresh1 is the same as that of Mp, and the unit of Thresh2 is the same as that of Mn. The meanings of other variables are the same as those of the variables in Event B1 above.

[0044] <Event T1> Event T1 indicates that the measurement time of the UE is within a predetermined time from the threshold value. Specifically, the UE considers that the entry condition of this event is satisfied when the condition T1-1 defined below is met, and considers that the departure condition of this event is satisfied when the condition T1-2 is met.

[0045] - Condition T1-1: Mt > Thresh1 - Condition T1-2: Mt > Thresh1 + Duration

[0046] The variables in the formula are defined as follows: - Mt is the time measured by the UE. - Thresh1 is the threshold parameter of this event (that is, the parameter (t1-Threshold) defined in the configuration information (reportConfigNR) corresponding to this event). - Duration is the parameter indicating the period of this event (that is, the parameter (duration) defined in the configuration information (reportConfigNR) corresponding to this event). - The unit of Mt is ms. - The unit of Thresh1 is the same as that of Mt. - The unit of Duration is the same as that of Mt.

[0047] <Event I1> Event I1 indicates that the interference becomes higher than the threshold value. Specifically, the UE considers that the entry condition of this event is satisfied when the condition I1-1 defined below is met, and considers that the departure condition of this event is satisfied when the condition I1-2 is met.

[0048] ・Condition I1-1 Mi-Hys>Thresh ・Condition I1-2 Mi+Hys <Thresh

[0049] The variables in the equations for the above conditions I1-1 and I1-2 are defined as follows: Mi is the interference measurement result, and offset is not taken into account. Hys is the hysteresis parameter for this event (i.e., the parameter (hysteresis) defined in the configuration information (reportConfigNR) for this event). Threshold is the threshold parameter for this event (i.e., the parameter (i1-Threshold) defined in the configuration information (reportConfigNR) for this event). The units of Mi and Thresh are dBm. The unit of Hys is dB.

[0050] (Event-Triggered Report) This section describes the event-triggered report in Rel. 18. The UE initiates the measurement reporting procedure when the entry condition of an event is met. Specifically, when Access Stratum (AS) security is successfully activated, the UE performs the following:

[0051] If the report type is set to event triggered (eventTriggered) and the corresponding reporting configuration does not contain the number of triggering cells (numberOfTriggeringCells), and the entry conditions applicable to this event, i.e. the event corresponding to the event ID of the corresponding reporting configuration in the parameter VarMeasConfig indicating the cumulative configuration of the measurement, are met for one or more relevant cells for all measurements after Layer 3 filtering made during the timeToTrigger defined for this event in VarMeasConfig, and VarMeasConfig does not contain a measurement report entry for this measurement ID (the first cell triggering the event), the following processing is performed:

[0052] (1) Include a measurement report entry in the measurement report list (VarMeasReportList) corresponding to this list of measurement IDs. (2) Set the number of reports sent parameter (numberOfReportsSent) defined in the measurement report list (VarMeasReportList) corresponding to this list of measurement IDs to 0. (3) Include the corresponding cell in the cell trigger list (cellsTriggeredList) defined in the measurement report list (VarMeasReportList) for this measurement ID. (4) In the report configuration, if useT312 is set to true, T310 of the corresponding SpCell is executed, and T310 has not been executed for the corresponding SpCell, start the timer T312 of the corresponding SpCell with the value of T312 set in the corresponding measurement object measObjectNR. (5) Start the measurement reporting procedure.

[0053] Note that the variable VarMeasConfig contains the cumulative configuration of measurements that the UE will perform, including intra-frequency, inter-frequency and inter-RAT mobility related measurements.

[0054] (Conditional Reconfiguration) In Rel. 18, the UE starts executing a conditional reconfiguration when the events (conditions) related to all measIDs in the trigger configuration (condTriggerConfig) of the corresponding cell are satisfied (a maximum of two measIDs can be configured in condTriggerConfig). Specifically, the UE performs the following process.

[0055] If an event (condition) associated with a measurement ID (measId) in an applicable conditional trigger configuration (condTriggerConfig) is fulfilled, the UE shall consider the applicable cell associated with the reconfiguration ID (condReconfigId) as the triggered cell and shall initiate a conditional reconfiguration execution.

[0056] Up to two measIds may be configured for each condReconfigId. The conditional reconfiguration events corresponding to the two measIds have the same / different event conditions, trigger amount, trigger timing, and trigger threshold.

[0057] (Performing Measurements / Reports / Cell Switches Based on Predicted Values) The following events can be defined for determining whether to trigger L1 / L2 / L3 measurements / reports / conditional reconfiguration, or to perform actions related to a cell switch (switch of serving cell) (performing a cell switch, sending a cell switch command, or sending the above-mentioned potential cell switch command). That is, when at least one of the following events 1 to 10 occurs, the UE may perform L1 / L2 / L3 measurements / reports, receive information related to conditional reconfiguration and perform reconfiguration, or perform actions related to a cell switch. The base station may perform a cell switch in response to receiving a cell switch command / potential cell switch command from the UE.

[0058] FIG. 3 is a flowchart illustrating an example of measurement / report / cell switch execution based on predicted values. The UE calculates predicted values ​​of L1 / L3 measurement results (step S11). Then, if an event based on the predicted values ​​(prediction results) of L1 / L3 occurs (YES in step S12), the UE may transmit a CSI report (e.g., L1 / L3 RSRP / SINR measurement / prediction results) or perform a cell switch operation (step S13). L3 filtering may be applied to calculate the predicted RSRP / SINR values. The predicted values ​​may be the top X (e.g., top 1) probability. The top X probability is the probability that a specific RS / beam will be equal to or greater than the Xth highest RSRP / SINR among specific RS resources.

[0059] The content to be measured / reported (e.g., L1-RSRP / L1-SINR, etc.) may be at least one of content measured using SSB / CSI-RS corresponding to the PCI of the serving cell and content measured using SSB / CSI-RS corresponding to a PCI (additional PCI) other than the PCI of the serving cell. The content to be reported may be defined in a specification, may be set / instructed by higher layer signaling / physical layer signaling, or may be transmitted (reported) by the UE as UE capability information.

[0060] The event based on the predicted value may be at least one of the following events 1 to 10. Note that the prediction result and the predicted value may be interpreted as interchangeable.

[0061] Event 1: The predicted result / predicted measurement result of the "serving cell" or a "specific RS of the serving cell" becomes better than a threshold. For example, Ms in Event A1 may be replaced with the predicted result / predicted measurement result.

[0062] Event 2: The predicted result / predicted measurement result of the "serving cell" or a "specific RS of the serving cell" becomes worse than a threshold. For example, Ms of event A2 may be replaced with the predicted result / predicted measurement result.

[0063] Event 3: Taking the offset into consideration, the predicted / measured result of the "neighboring cell" or "a specific RS of the neighboring cell" becomes better than the predicted / measured result of the "SpCell" or "a specific RS of the SpCell." For example, Mp in Event A3 may be replaced with the predicted / measured result of the "SpCell" or "a specific RS of the SpCell," and Mn may be replaced with the predicted / measured result of the "neighboring cell" or "a specific RS of the neighboring cell."

[0064] Event 4: The predicted / measured result of the "neighboring cell" or the "specific RS of the neighboring cell" becomes better than a threshold. For example, Mn in Event A4 may be replaced with the predicted / measured result of the "neighboring cell" or the "specific RS of the neighboring cell."

[0065] Event 5: The predicted / measured result of the "SpCell" or "a specific RS in the SpCell" becomes worse than threshold 1, and the predicted / measured result of the "neighboring cell" or "a specific RS in the neighboring cell" becomes better than threshold 2. For example, Mp in event A5 may be replaced with the predicted / measured result of the "SpCell" or "a specific RS in the SpCell", and Mn may be replaced with the predicted / measured result of the "neighboring cell" or "a specific RS in the neighboring cell".

[0066] Event 6: Taking the offset into consideration, the prediction / measurement result of the “neighboring cell” or “a specific RS in the neighboring cell” becomes better than the prediction / measurement result of the “SCell” or “a specific RS in the SCell.” For example, Ms in Event A6 may be replaced with the prediction / measurement result of the “SCell” or “a specific RS in the SCell,” and Mn may be replaced with the prediction / measurement result of the “neighboring cell” or “a specific RS in the neighboring cell.”

[0067] Event 7: The predicted result / predicted measurement result of the "inter-RAT neighboring cell" or the "specific RS of the inter-RAT neighboring cell" becomes better than a threshold. For example, Mn in event B1 may be replaced with the predicted result / predicted measurement result of the "inter-RAT neighboring cell" or the "specific RS of the inter-RAT neighboring cell."

[0068] Event 8: The predicted / measured result of the "PCell" or "specific RS of the PCell" becomes worse than threshold 1, and the predicted / measured result of the "inter-RAT neighboring cell" or "specific RS of the inter-RAT neighboring cell" becomes better than threshold 2. For example, Mp in event B2 may be replaced with the predicted / measured result of the "PCell" or "specific RS of the PCell", and Mn may be replaced with the predicted result / predicted measurement result of the "inter-RAT neighboring cell" or "specific RS of the inter-RAT neighboring cell".

[0069] Event 9: The predicted / measured interference result of the “PCell” or a “specific RS in the PCell” becomes higher than a threshold. For example, Mi in event I1 may be replaced with the predicted / measured interference result of the “PCell” or a “specific RS in the PCell.”

[0070] Event 10: The UE's predicted time is within a predetermined time from a threshold. For example, Mt of event T1 may be replaced with the UE's predicted time (e.g., the predicted time of RSRP / SINR of L1 / L2 / L3).

[0071] Each threshold, event offset, hysteresis parameter, cell-specific offset, and RS-specific offset in the present disclosure may be specified in a specification, may be configured / instructed to the UE by higher layer signaling / physical layer signaling, or may be transmitted (reported) by the UE as UE capability information.

[0072] The specific RS may be the RS with the maximum / minimum predicted / measured RSRP / SINR. Hysteresis parameters may be used for each of the enter condition and the leave condition. Hysteresis parameters may be used commonly or separately for the enter condition and the leave condition.

[0073] Depending on the target of prediction / measurement, a specific offset may be considered, for example, a cell-specific offset or an RS-specific offset may be applied depending on the target of prediction / measurement.

[0074] The time instance associated with the predicted measurement result may be specified in the specification, may be configured / indicated to the UE by higher layer signaling / physical layer signaling, or may be transmitted (reported) by the UE as UE capability information.

[0075] (Analysis) As described above, when a specific event occurs, the UE performs measurements / reports, etc. However, there is a risk that C-plane signaling will increase depending on the frequency of measurements / reports, etc. For example, when event-triggered measurement reporting is used, there is a risk that the number of measurements / reports will be large, increasing C-plane signaling and reducing the ratio of U-plane signaling.

[0076] In particular, when performing carrier aggregation (CA), there is a possibility that the number of C-planes will increase due to measurements / reports of events A4, A6, etc., which are used to identify Scells that can be / should be added. In addition, since existing events do not take mobility state into consideration, the optimal CA cell combination is particularly likely to change for terminals with high mobility speeds, which may increase the number of event-triggered measurement reports. If the number of C-planes increases due to measurements / reports, there is a risk that communication throughput will decrease.

[0077] Therefore, the present inventors came up with the idea of ​​a method that can execute appropriate processing depending on the mobility state.

[0078] Hereinafter, embodiments according to the present disclosure will be described in detail with reference to the drawings. Wireless communication methods according to the embodiments may be applied independently or in combination.

[0079] (Various Reinterpretations) In the present disclosure, a word enclosed in "( )" in a sentence may indicate an explanation of the word immediately preceding it (for example, an explanation of spelling), a paraphrase, a specific example, a supplementary explanation, etc. Furthermore, in the present disclosure, a word enclosed in "[ ]" in a sentence may be interpreted including the word in the meaning of the entire sentence, or may be interpreted excluding (ignoring) the word in the meaning of the entire sentence. Note that "( )" and "[ ]" may also be used for purposes / meanings other than those mentioned above.

[0080] In the present disclosure, "A / B" and "at least one of A and B" may be interpreted interchangeably. Also, in the present disclosure, "A / B / C" may mean "at least one of A, B, and C."

[0081] In the present disclosure, terms such as notify, activate, deactivate, indicate (or indicate), select, configure, update, and determine may be read interchangeably. In the present disclosure, terms such as support, control, controllable, operate, and operate may be read interchangeably.

[0082] In the present disclosure, Radio Resource Control (RRC), RRC parameters, RRC messages, higher layer parameters, fields, information elements (IEs), settings, etc. may be interchangeable. In the present disclosure, Medium Access Control (MAC) control elements (CEs), update commands, activation / deactivation commands, etc. may be interchangeable.

[0083] In the present disclosure, the higher layer signaling may be, for example, any one of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, other messages (e.g., messages from the core network such as positioning protocol (e.g., NR Positioning Protocol A (NRPPa) / LTE Positioning Protocol (LPP)) messages), or a combination thereof.

[0084] In the present disclosure, MAC signaling may use, for example, a MAC Control Element (MAC CE), a MAC Protocol Data Unit (PDU), etc. Broadcast information may be, for example, a Master Information Block (MIB), a System Information Block (SIB), Remaining Minimum System Information (RMSI), Other System Information (OSI), etc.

[0085] In the present disclosure, physical layer signaling may be, for example, Downlink Control Information (DCI), Uplink Control Information (UCI), and the like.

[0086] A specific mobility state, a normal mobility state, a medium mobility state, and a high mobility state may be interchangeable. An event, a condition, an entering condition, and a leaving condition may be interchangeable. Reconfiguration, an RRC reconfiguration, a measurement / report, a cell switch, a handover, an L1 / L2 Triggered Mobility (LTM), and an LTM cell switch may be interchangeable. Measurement / report may be interchangeable with L1 / L3 measurement / report, CSI measurement / report, beam measurement / report, etc.

[0087] The event of the present disclosure may be, for example, at least one of the events A1 to A6, B1, B2, T1, and I1 described above (events for L3 measurement / reporting) and events 1 to 10 described above (executing measurement / reporting / cell switch based on predicted values). For example, multiple events may be combined using an AND condition or an OR condition. The event of the present disclosure may be at least one of the options in the first embodiment being higher / lower than a threshold.

[0088] (Wireless Communication Method) First Embodiment In this embodiment, the mobility state may be determined by at least one of the following options:

[0089] Option 1: Number of cell reselections in a specific period.

[0090] Option 2: The number of handovers or reconfigurations in a specific period. Only the number of specific handovers may be counted. For example, the number of handovers may be the number of cell switches performed by LTM in a specific period.

[0091] Option 3: Number of handover failures in a specific period.

[0092] Option 4: Number of measurements that meet the entering / leaving conditions for a specific period. In this case, only measurements that meet the entering / leaving conditions for a specific event may be counted.

[0093] Option 5: Correlation value of channel characteristics in the time domain.

[0094] Option 6: UE movement speed (e.g. average / maximum / minimum movement speed in a specific period).

[0095] Option 7: The change in the UE's location (distance traveled) over a specific period of time.

[0096] Option 8: A combination of at least one of options 1-7.

[0097] The UE may determine / select / use a mobility state based on the values ​​of the elements of Options 1 to 7. For example, the UE may receive information used to determine the mobility state (e.g., a specific period, a threshold, a specific event, a specific handover, etc.), and may determine / select / use a specific mobility state when the values ​​of the elements of Options 1 to 7 are higher / lower than the threshold. The information used to determine the mobility state in this embodiment may be determined based on information received by the method described in <<Notifying Information to UE>> below and information transmitted / reported by at least one of the methods described in <<Notifying Information from UE>> (e.g., UE capability information).

[0098] Rel. 18 defines three mobility states: a normal mobility state, a medium mobility state, and a high mobility state, but four or more mobility states may be defined.

[0099] According to the first embodiment, since the mobility state is appropriately determined, even when measurement reporting is performed based on the mobility state, the frequency of measurement reporting can be appropriately controlled.

[0100] Second Embodiment The UE may implement at least one of the following options depending on the mobility state. That is, a triggerable event may be determined depending on the mobility state. For example, the UE may implement at least one of the following options when a specific mobility state is determined by the process of the first embodiment. The "specific event" in the present disclosure may be, for example, at least one of the events A1 to A6, B1, B2, T1, and I1 described above (events for L3 measurement / reporting) and events 1 to 10 described above (performing measurement / reporting / cell switch based on predicted values).

[0101] Option 1: The UE decides whether to initiate measurement / reporting (eg, L1 / L3 measurement / reporting) when the enter condition of a specific event is met, depending on the mobility state.

[0102] Option 2: The UE decides whether to perform a conditional reconfiguration (e.g., RRC reconfiguration) when an enter condition of a specific event is met, depending on the mobility state. The reconfiguration is, for example, an RRC reconfiguration.

[0103] Option 3: The UE decides whether to perform a conditional cell switch (eg, cell switch in LTM) depending on the mobility state when the enter condition of a specific event is met.

[0104] Option 4: The UE determines whether the entry condition of a specific event is met or not according to the mobility state, for example, if the specific mobility state is not determined, the process of determining whether the entry condition of a specific event is met or not may be skipped.

[0105] Option 5: The UE determines whether the departure condition of a specific event is satisfied or not according to the mobility state. For example, if the specific mobility state is not determined, the process of determining whether the departure condition of a specific event is satisfied or not may be skipped.

[0106] For example, for option 4, the UE may decide not to satisfy the enter condition of a particular event when in a high mobility state, or to satisfy the enter condition of a particular event when in a normal mobility state, thereby avoiding an increase in the occurrence of the event during high speed movement and a decrease in the occurrence of the event during low speed movement (or no movement).

[0107] 4 is a diagram illustrating an example of the process of the second embodiment. The UE determines its mobility state (S21). In S21, the mobility state determination method of Rel. 18 or the process of the first embodiment is used. Then, the UE determines whether its mobility state is a specific mobility state (S22). If the answer is YES in S22, it determines whether the condition of a specific event (enter condition / leave condition) is met (S23). If the answer is YES in S23, the UE performs a specific process (e.g., measurement / report start, reconfiguration, cell switch, etc.) (S24).

[0108] The specific event in this embodiment may be determined based on at least one of information received by the method described in <<Notifying Information to UE>> below, or information sent / reported by the method described in <<Notifying Information from UE>> (e.g., UE capability information), or mobility status.

[0109] The process of this embodiment may be applied only to a specific cell / event, which may be determined based on at least one of information received by the method described in <<Notifying Information to UE>> below, information transmitted / reported by the method described in <<Notifying Information from UE>> (e.g., UE capability information), and mobility status.

[0110] According to the second embodiment, even when measurement report / reconfiguration / cell switch is performed based on the mobility state, the frequency of measurement report / reconfiguration / cell switch can be appropriately controlled.

[0111] <Third Embodiment> A UE may change the conditions (enter conditions / leave conditions) of an event (e.g., a specific event) based on its mobility state. The UE may receive the changed conditions by the method described in <<Notification of Information to UE>> described later. The UE may transmit / report the changed conditions by the method described in <<Notification of Information from UE>>.

[0112] The UE may change (eg, increase / decrease) the values ​​(eg, thresholds / hysteresis parameters / offsets) used for the event enter / leave conditions based on the mobility state.

[0113] The value to be changed may be defined / set for each mobility state, serving / target cell, and area to which the UE belongs (exists), and may be determined based on the setting of the SpeedStateScaleFactor (FIG. 2) described above.

[0114] An offset value may be added to the enter / exit conditions of an event based on the mobility state.

[0115] The offset value to be added may be specified / set for each mobility state, serving / target cell, and area to which the UE belongs (exists). The offset value may be determined based on the setting of the above-mentioned SpeedStateScaleFactor (FIG. 2).

[0116] For example, in a high mobility state, an offset may be added to the threshold value of the enter condition. Alternatively, in a high mobility state, the threshold value of the enter condition may be changed to a higher value. This makes it possible to prevent excessive measurement / reporting frequency when moving at high speed.

[0117] The process of this embodiment may be applied only to a specific cell / event, which may be determined based on at least one of information received by the method described in <<Notifying Information to UE>> below, information transmitted / reported by the method described in <<Notifying Information from UE>> (e.g., UE capability information), and mobility status.

[0118] According to this embodiment, the enter condition / leave condition of an event can be appropriately changed based on the mobility state.

[0119] <Fourth Embodiment> <<Embodiment 4-1>> An event may be used to determine whether an enter condition / leave condition is satisfied depending on a mobility state (e.g., the mobility state in the first embodiment). For example, if the values ​​of the elements of options 1 to 7 are higher / lower than a threshold, the UE may determine whether to start measurement / reporting, perform conditional reconfiguration, or perform a cell switch (e.g., a cell switch in LTM).

[0120] The threshold may vary depending on the serving cell / area to which the UE belongs.

[0121] <<Embodiment 4-2>> When a number of specific events satisfy an enter condition, the UE may perform measurement / report start, conditional reconfiguration, or cell switch (for example, cell switch in LTM).

[0122] The specific events in this embodiment may be determined based on at least one of information received by the method described in <<Notifying Information to UE>> below, or information sent / reported by the method described in <<Notifying Information from UE>> (e.g., UE capability information), or mobility status.

[0123] According to this embodiment, when a specific event / specific multiple events meet the enter conditions, the UE starts measurement / reporting, performs conditional reconfiguration, and cell switch (e.g., cell switch in LTM), thereby preventing these operations from occurring excessively frequently.

[0124] <Supplementary Information> <<Notification of Information to UE>> In the above-described embodiments, notification of any information to the UE [from a Network (NW) (e.g., a Base Station (BS))] (in other words, reception of any information from the BS by the UE) may be performed using physical layer signaling (e.g., DCI), higher layer signaling (e.g., RRC signaling, MAC CE), a specific signal / channel (e.g., PDCCH, PDSCH, reference signal), or a combination thereof.

[0125] When the notification is performed by a MAC CE, the MAC CE may be identified by including a new Logical Channel ID (LCID) in the MAC subheader, which is not defined in existing standards.

[0126] When the notification is made by DCI, the notification may be made by a specific field of the DCI, a Radio Network Temporary Identifier (RNTI) used to scramble Cyclic Redundancy Check (CRC) bits assigned to the DCI, the format of the DCI, etc.

[0127] In addition, notification of any information to the UE in the above-mentioned embodiments may be performed periodically, semi-persistently (triggered by an instruction from the UE or the gNB), or aperiodically (triggered by an instruction from the UE or the gNB).

[0128] In the above embodiment, the UE may receive information from the NW as at least one of the following QCL rules: QCL type A. QCL type B. QCL type C. QCL type D.

[0129] In the above-described embodiment, the QCL source RS for each QCL type may be at least one of the following several RSs: SSB; CSI-RS with / without repetition; TRS; DMRS of PDCCH / PDSCH.

[0130] In the above-described embodiment, the information from the NW may be set / indicated by the following methods: Common to multiple UEs or UE-specific; Cell-specific or common to multiple cells; Per UE / per CC / per BWP / per band / per cell / per cell group (CG).

[0131] <<Notification of Information from UE>> In the above-described embodiments, notification of any information from the UE [to the NW] (in other words, transmission / report of any information from the UE to the BS) may be performed using physical layer signaling (e.g., UCI), higher layer signaling (e.g., RRC signaling, MAC CE), a specific signal / channel (e.g., PUCCH, PUSCH, PRACH, reference signal), or a combination thereof.

[0132] When the notification is performed by a MAC CE, the MAC CE may be identified by including a new LCID, which is not defined in existing standards, in the MAC subheader.

[0133] If the notification is made by UCI, the notification may be transmitted using PUCCH or PUSCH.

[0134] In addition, notification of any information from the UE in the above-mentioned embodiments may be periodic, semi-persistent (triggered by an instruction from the UE or gNB), or aperiodic (triggered by an instruction from the UE or gNB).

[0135] <<Regarding Application of Each Embodiment>> In a UE / BS, specific (one or more) processes / operations / controls / assumptions / information for at least one of the above-mentioned embodiments may be applied (used) when one or more of the following conditions are met: - a higher layer parameter indicating the specific processes / operations / controls / assumptions / information is configured; - the specific processes / operations / controls / assumptions / information is determined based on related higher layer parameters; - the specific processes / operations / controls / assumptions / information is specified / activated / triggered by a MAC CE / DCI / UCI / resource / channel / RS; - a specific UE capability indicating (or related to) the specific processes / operations / controls / assumptions / information is reported or supported; - the application of the specific processes / operations / controls / assumptions / information is determined based on specific conditions.

[0136] The specific UE capability may indicate at least one of the following: - Supporting the specific process / operation / control / assumption / information; - In embodiment 4-2, the number of events that can be taken into account when performing a specific process (e.g., measurement / report initiation) based on multiple events; - Supported events; - Supported mobility states.

[0137] In the present disclosure, the terms "supporting" and "whether to support" may be read interchangeably.

[0138] Furthermore, the above-mentioned specific UE capability may be a capability that is applied across all frequencies (commonly regardless of frequency), or may be a capability for each frequency (e.g., one or a combination of a cell, a band, a band combination, a BWP, a component carrier, etc.), or may be a capability for each frequency range (e.g., Frequency Range 1 (FR1), FR2, FR3, FR4, FR5, FR2-1, FR2-2), or may be a capability for each subcarrier spacing (SubCarrier Spacing (SCS)), or may be a capability for each Feature Set (FS) or Feature Set Per Component-carrier (FSPC).

[0139] Furthermore, the specific UE capability may be a capability that is applied to all duplexing methods (commonly regardless of the duplexing method), or may be a capability for each duplexing method (e.g., Time Division Duplex (TDD) or Frequency Division Duplex (FDD)).

[0140] If the above conditions are not met, the UE / BS may follow the behavior specified in existing 3GPP releases.

[0141] (Supplementary Notes) The following inventions are supplementary notes regarding one embodiment of the present disclosure. [Supplementary Note 1] A terminal having: a receiving unit that receives information used to determine a mobility state; and a control unit that determines a mobility state based on the information, determines whether a condition of a specific event is satisfied when the terminal is in a specific mobility state, and executes a specific process when the condition of the specific event is satisfied. [Supplementary Note 2] The terminal according to Supplementary Note 1, wherein the specific process is at least one of measurement, reporting, Radio Resource Control (RRC) reconfiguration, and cell switch. [Supplementary Note 3] The terminal according to Supplementary Note 1 or Supplementary Note 2, wherein the control unit changes the condition of the specific event based on the mobility state. [Supplementary Note 4] The terminal according to any one of Supplementary Notes 1 to 3, wherein the control unit executes the specific process when conditions of a plurality of the specific events are satisfied.

[0142] (Wireless Communication System) The configuration of a wireless communication system according to an embodiment of the present disclosure will be described below. In this wireless communication system, communication is performed using any one of the wireless communication methods according to the above embodiments of the present disclosure or a combination thereof.

[0143] 5 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment. The wireless communication system 1 (which may be simply referred to as system 1) may be a system that realizes communication using Long Term Evolution (LTE) or 5th generation mobile communication system New Radio (5G NR) specified by the Third Generation Partnership Project (3GPP).

[0144] The wireless communication system 1 may also support dual connectivity between multiple Radio Access Technologies (RATs) (Multi-RAT Dual Connectivity (MR-DC)). MR-DC may include dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), dual connectivity between NR and LTE (NR-E-UTRA Dual Connectivity (NE-DC)), etc.

[0145] In EN-DC, the LTE (E-UTRA) base station (eNB) is the master node (Master Node (MN)), and the NR base station (gNB) is the secondary node (Secondary Node (SN)). In NE-DC, the NR base station (gNB) is the MN, and the LTE (E-UTRA) base station (eNB) is the SN.

[0146] The wireless communication system 1 may support dual connectivity between multiple base stations within the same RAT (for example, dual connectivity in which both the MN and SN are NR base stations (gNBs) (NR-NR Dual Connectivity (NN-DC))).

[0147] The wireless communication system 1 may include a base station 11 that forms a macrocell C1 with a relatively wide coverage, and base stations 12 (12a-12c) that are located within the macrocell C1 and form small cells C2 that are smaller than the macrocell C1. A user terminal 20 may be located within at least one of the cells. The location, number, shape, size, etc. of each cell and user terminal 20 are not limited to the embodiment shown in the figure. Hereinafter, when there is no need to distinguish between the base stations 11 and 12, they will be collectively referred to as the base station 10.

[0148] The wireless communication system 1 may utilize multi-input multi-output (MIMO). For example, one cell may be formed by one antenna / base station 10, or may be formed by multiple antennas / base stations 10. One [virtual] cell (which may be called, for example, a supercell) may be composed of multiple [virtual] cells (which may be called, for example, subcells). A supercell may correspond to a cell with a fixed physical range, and a subcell may correspond to a cell with a quasi-static / dynamically variable physical range. In this case, the wireless communication system 1 may be called a cell-free system.

[0149] The user terminal 20 may be connected to at least one of the multiple base stations 10. The user terminal 20 may utilize at least one of carrier aggregation (CA) using multiple component carriers (CCs) and dual connectivity (DC).

[0150] Each CC may be included in at least one of a first frequency band (Frequency Range 1 (FR1)) and a second frequency band (Frequency Range 2 (FR2)). The macro cell C1 may be included in FR1, and the small cell C2 may be included in FR2. For example, FR1 may be a frequency band of 6 GHz or less (sub-6 GHz), and FR2 may be a frequency band higher than 24 GHz (above-24 GHz). Note that the frequency bands and definitions of FR1 and FR2 are not limited to these, and for example, FR1 may correspond to a higher frequency band than FR2.

[0151] Furthermore, the user terminal 20 may perform communication using at least one of time division duplex (TDD) and frequency division duplex (FDD) in each CC.

[0152] The multiple base stations 10 may be connected by wire (e.g., optical fiber compliant with the Common Public Radio Interface (CPRI), an X2 / Xn interface, etc.) or wirelessly (e.g., NR communication). For example, when NR communication is used as a backhaul between the base stations 11 and 12, the base station 11 corresponding to the upper station may be called an Integrated Access Backhaul (IAB) donor, and the base station 12 corresponding to the relay station (relay) may be called an IAB node.

[0153] The base station 10 may be connected to the core network 30 directly or via another base station 10. The core network 30 may include, for example, at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), a Next Generation Core (NGC), and the like.

[0154] The core network 30 may include network functions (Network Functions (NF)) such as a User Plane Function (UPF), an Access and Mobility management Function (AMF), a Session Management Function (SMF), a Unified Data Management (UDM), an Application Function (AF), a Data Network (DN), a Location Management Function (LMF), and Operation, Administration and Maintenance (Management) (OAM). A single network node may provide multiple functions. Communication with an external network (e.g., the Internet) may also be performed via the DN.

[0155] The user terminal 20 may be a terminal that supports at least one of communication methods such as LTE, LTE-A, and 5G.

[0156] An Orthogonal Frequency Division Multiplexing (OFDM)-based radio access scheme may be used in the wireless communication system 1. For example, Cyclic Prefix OFDM (CP-OFDM), Discrete Fourier Transform Spread OFDM (DFT-s-OFDM), Orthogonal Frequency Division Multiple Access (OFDMA), Single Carrier Frequency Division Multiple Access (SC-FDMA), or the like may be used in at least one of the downlink (DL) and uplink (UL).

[0157] The radio access scheme may also be called a waveform. Note that in the wireless communication system 1, other radio access schemes (e.g., other single-carrier transmission schemes, other multi-carrier transmission schemes) may be used as the UL and DL radio access schemes.

[0158] In the wireless communication system 1, a downlink shared channel (Physical Downlink Shared Channel (PDSCH)) shared by each user terminal 20, a broadcast channel (Physical Broadcast Channel (PBCH)), a downlink control channel (Physical Downlink Control Channel (PDCCH)), etc. may be used as the downlink channel.

[0159] Furthermore, in the wireless communication system 1, an uplink shared channel (Physical Uplink Shared Channel (PUSCH)) shared by each user terminal 20, an uplink control channel (Physical Uplink Control Channel (PUCCH)), a random access channel (Physical Random Access Channel (PRACH)), or the like may be used as an uplink channel.

[0160] The PDSCH transmits user data, higher layer control information, a System Information Block (SIB), etc. The PUSCH may transmit user data, higher layer control information, etc. Furthermore, the PBCH may transmit a Master Information Block (MIB).

[0161] Lower layer control information may be transmitted by the PDCCH. The lower layer control information may include, for example, Downlink Control Information (DCI) including scheduling information for at least one of the PDSCH and the PUSCH.

[0162] Note that the DCI for scheduling the PDSCH may be referred to as a DL assignment, a DL DCI, etc., and the DCI for scheduling the PUSCH may be referred to as a UL grant, a UL DCI, etc. Note that the PDSCH may be replaced with DL data, and the PUSCH may be replaced with UL data.

[0163] A control resource set (CORESET) and a search space may be used to detect the PDCCH. The CORESET corresponds to resources for searching for DCI. The search space corresponds to a search region and a search method for PDCCH candidates. One CORESET may be associated with one or more search spaces. The UE may monitor the CORESET associated with a certain search space based on the search space configuration.

[0164] One search space may correspond to PDCCH candidates corresponding to one or more aggregation levels. One or more search spaces may be referred to as a search space set. Note that the terms "search space," "search space set," "search space configuration," "search space set configuration," "CORESET," "CORESET configuration," and the like in the present disclosure may be read interchangeably.

[0165] The PUCCH may transmit uplink control information (UCI) including at least one of channel state information (CSI), delivery confirmation information (which may be called, for example, Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK / NACK, etc.), and scheduling request (SR). The PRACH may transmit a random access preamble for establishing a connection with a cell.

[0166] In the present disclosure, downlink, uplink, etc. may be expressed without adding "link." Also, various channels may be expressed without adding "Physical" to the beginning.

[0167] In the wireless communication system 1, a synchronization signal (SS), a downlink reference signal (DL-RS), etc. may be transmitted. In the wireless communication system 1, as the DL-RS, a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS), a demodulation reference signal (DMRS), a positioning reference signal (PRS), a phase tracking reference signal (PTRS), etc. may be transmitted.

[0168] The synchronization signal may be, for example, at least one of a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS). A signal block including an SS (PSS, SSS) and a PBCH (and a DMRS for the PBCH) may be referred to as an SS / PBCH block, an SS Block (SSB), or the like. Note that the SS, SSB, and the like may also be referred to as a reference signal.

[0169] Furthermore, in the wireless communication system 1, a sounding reference signal (SRS), a demodulation reference signal (DMRS), or the like may be transmitted as an uplink reference signal (UL-RS). Note that the DMRS may also be called a user equipment-specific reference signal (UE-specific reference signal).

[0170] (Base Station) Fig. 6 is a diagram showing an example of the configuration of a base station according to an embodiment. The base station 10 includes a control unit 110, a transceiver unit 120, a transceiver antenna 130, and a transmission line interface 140. Note that the base station may include one or more of each of the control unit 110, the transceiver unit 120, the transceiver antenna 130, and the transmission line interface 140.

[0171] In this example, the functional blocks of the characteristic parts of the present embodiment are mainly shown, and it may be assumed that the base station 10 also has other functional blocks necessary for wireless communication. Some of the processing of each unit described below may be omitted.

[0172] The control unit 110 performs overall control of the base station 10. The control unit 110 can be configured from a controller, a control circuit, and the like that are explained based on common understanding in the technical field to which the present disclosure relates.

[0173] The control unit 110 may control signal generation, scheduling (e.g., resource allocation, mapping), etc. The control unit 110 may control transmission and reception using the transceiver unit 120, the transceiver antenna 130, and the transmission path interface 140, measurement, etc. The control unit 110 may generate data, control information, sequences, etc. to be transmitted as signals, and transfer them to the transceiver unit 120. The control unit 110 may perform call processing (setting up, releasing, etc.) of communication channels, status management of the base station 10, management of radio resources, etc.

[0174] The transceiver unit 120 may include a baseband unit 121, a radio frequency (RF) unit 122, and a measurement unit 123. The baseband unit 121 may include a transmission processing unit 1211 and a reception processing unit 1212. The transceiver unit 120 may be configured with a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transceiver circuit, etc., which are described based on common understanding in the technical field related to the present disclosure.

[0175] The transmitting / receiving unit 120 may be configured as an integrated transmitting / receiving unit, or may be configured from a transmitting unit and a receiving unit. The transmitting unit may be configured from a transmission processing unit 1211 and an RF unit 122. The receiving unit may be configured from a reception processing unit 1212, the RF unit 122, and a measurement unit 123.

[0176] The transmitting and receiving antenna 130 can be configured from an antenna described based on common understanding in the technical field to which the present disclosure relates, such as an array antenna.

[0177] The transceiver 120 may transmit the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transceiver 120 may receive the above-mentioned uplink channel, uplink reference signal, etc.

[0178] The transceiver 120 may form at least one of the transmit beam and the receive beam using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), or the like.

[0179] The transmitter / receiver unit 120 (transmission processing unit 1211) may perform Packet Data Convergence Protocol (PDCP) layer processing, Radio Link Control (RLC) layer processing (e.g., RLC retransmission control), Medium Access Control (MAC) layer processing (e.g., HARQ retransmission control), etc. on data, control information, etc. obtained from the control unit 110, and generate a bit string to be transmitted.

[0180] The transmitter / receiver unit 120 (transmission processing unit 1211) may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, Discrete Fourier Transform (DFT) processing (if necessary), Inverse Fast Fourier Transform (IFFT) processing, precoding, and digital-to-analog conversion on the bit string to be transmitted, and output a baseband signal.

[0181] The transceiver unit 120 (RF unit 122) may perform modulation, filtering, amplification, etc. on the baseband signal to a radio frequency band, and transmit the radio frequency band signal via the transceiver antenna 130.

[0182] On the other hand, the transmitting / receiving unit 120 (RF unit 122) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency band signal received by the transmitting / receiving antenna 130.

[0183] The transceiver 120 (reception processing unit 1212) may apply reception processing such as analog-to-digital conversion, Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal, thereby acquiring user data, etc.

[0184] The transceiver 120 (measurement unit 123) may perform measurements on the received signal. For example, the measurement unit 123 may perform Radio Resource Management (RRM) measurements, Channel State Information (CSI) measurements, etc. based on the received signal. The measurement unit 123 may measure received power (e.g., Reference Signal Received Power (RSRP)), received quality (e.g., Reference Signal Received Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Signal to Noise Ratio (SNR)), signal strength (e.g., Received Signal Strength Indicator (RSSI)), propagation path information (e.g., CSI), etc. The measurement results may be output to the control unit 110.

[0185] The transmission path interface 140 may transmit and receive signals (backhaul signaling) between devices included in the core network 30 (e.g., network nodes that provide NF), other base stations 10, etc., and may acquire and transmit user data (user plane data), control plane data, etc. for the user terminal 20.

[0186] The transmitting section and receiving section of the base station 10 in the present disclosure may be configured by at least one of the transmitting / receiving section 120, the transmitting / receiving antenna 130, and the transmission path interface 140.

[0187] The base station 10 may be separated into three elements: a radio unit (RU), a distributed unit (DU), and a central unit (CU). For example, the RU may implement RF processing (digital beamforming, digital-to-analog conversion, analog beamforming, etc.) and lower-level functions of the physical layer (precoding, IFFT, FFT, etc.). The DU may implement higher-level functions of the physical layer (coding to resource element mapping, etc.), MAC layer functions, and RLC layer functions. The CU may implement the functions of the PDCP layer, Service Data Adaptation Protocol (SDAP) layer, and RRC layer.

[0188] In the present disclosure, the base station 10 may include a single device that realizes all of the functions of the RU, DU, and CU, or may include multiple devices that each realize some of the functions of the RU, DU, and CU and are connected to each other. In the present disclosure, the base station 10 may be interchangeably read as RU / DU / CU.

[0189] The transceiver 120 may transmit information used to determine the mobility state.

[0190] The control unit 110 may determine a mobility state based on the information, determine whether a condition for a specific event is met when the terminal is in a specific mobility state, and execute a specific process when the condition for the specific event is met. The control unit 110 may, for example, perform at least one of receiving a report transmitted by the UE, reconfiguration (RRC reconfiguration), and cell switch.

[0191] (User Terminal) Fig. 7 is a diagram showing an example of the configuration of a user terminal according to one embodiment. The user terminal 20 includes a control unit 210, a transceiver unit 220, and a transceiver antenna 230. Note that the user terminal 20 may include one or more of each of the control unit 210, the transceiver unit 220, and the transceiver antenna 230.

[0192] In this example, the functional blocks of the characteristic parts of the present embodiment are mainly shown, and it may be assumed that the user terminal 20 also has other functional blocks necessary for wireless communication. Some of the processing of each unit described below may be omitted.

[0193] The control unit 210 performs overall control of the user terminal 20. The control unit 210 can be configured from a controller, a control circuit, etc., which are described based on common understanding in the technical field to which the present disclosure relates.

[0194] The control unit 210 may control signal generation, mapping, etc. The control unit 210 may control transmission and reception, measurement, etc. using the transceiver unit 220 and the transceiver antenna 230. The control unit 210 may generate data, control information, sequences, etc. to be transmitted as signals and transfer them to the transceiver unit 220.

[0195] The transceiver unit 220 may include a baseband unit 221, an RF unit 222, and a measurement unit 223. The baseband unit 221 may include a transmission processing unit 2211 and a reception processing unit 2212. The transceiver unit 220 may be configured with a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transceiver circuit, etc., which are described based on common understanding in the technical field related to the present disclosure.

[0196] The transmitting / receiving unit 220 may be configured as an integrated transmitting / receiving unit, or may be composed of a transmitting unit and a receiving unit. The transmitting unit may be composed of a transmission processing unit 2211 and an RF unit 222. The receiving unit may be composed of a reception processing unit 2212, an RF unit 222, and a measurement unit 223.

[0197] The transmitting / receiving antenna 230 can be configured from an antenna described based on common understanding in the technical field to which the present disclosure relates, such as an array antenna.

[0198] The transceiver 220 may receive the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transceiver 220 may transmit the above-mentioned uplink channel, uplink reference signal, etc.

[0199] The transceiver unit 220 may form at least one of the transmit beam and the receive beam using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), or the like.

[0200] The transceiver unit 220 (transmission processing unit 2211) may perform PDCP layer processing, RLC layer processing (e.g., RLC retransmission control), MAC layer processing (e.g., HARQ retransmission control), etc. on data, control information, etc. obtained from the control unit 210, and generate a bit string to be transmitted.

[0201] The transmitter / receiver unit 220 (transmission processing unit 2211) may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, DFT processing (if necessary), IFFT processing, precoding, and digital-to-analog conversion on the bit string to be transmitted, and output a baseband signal.

[0202] Whether or not to apply DFT processing may be based on the setting of transform precoding. When transform precoding is enabled for a certain channel (e.g., PUSCH), the transceiver unit 220 (transmission processing unit 2211) may perform DFT processing as the transmission processing to transmit the channel using a DFT-s-OFDM waveform, and if not, it may not be necessary to perform DFT processing as the transmission processing.

[0203] The transceiver unit 220 (RF unit 222) may perform modulation, filtering, amplification, etc. on the baseband signal to a radio frequency band, and transmit the radio frequency band signal via the transceiver antenna 230.

[0204] On the other hand, the transceiver unit 220 (RF unit 222) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency band signal received by the transceiver antenna 230.

[0205] The transceiver unit 220 (reception processing unit 2212) may apply reception processing such as analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal, and acquire user data, etc.

[0206] The transceiver 220 (measurement unit 223) may perform measurements on the received signal. For example, the measurement unit 223 may perform RRM measurements, CSI measurements, etc. based on the received signal. The measurement unit 223 may measure received power (e.g., RSRP), received quality (e.g., RSRQ, SINR, SNR), signal strength (e.g., RSSI), propagation path information (e.g., CSI), etc. The measurement results may be output to the control unit 210.

[0207] The measurement unit 223 may derive channel measurements for CSI calculation based on the channel measurement resources. The channel measurement resources may be, for example, non-zero power (NZP) CSI-RS resources. The measurement unit 223 may also derive interference measurements for CSI calculation based on the interference measurement resources. The interference measurement resources may be at least one of an NZP CSI-RS resource for interference measurement, a CSI-Interference Measurement (IM) resource, etc. Note that CSI-IM may be referred to as CSI-Interference Management (IM) or may be interchangeably read as Zero Power (ZP) CSI-RS. Note that in the present disclosure, CSI-RS, NZP CSI-RS, ZP CSI-RS, CSI-IM, CSI-SSB, etc. may be interchangeably read as interchangeable.

[0208] The transmitting unit and receiving unit of the user terminal 20 in the present disclosure may be configured by at least one of the transmitting / receiving unit 220 and the transmitting / receiving antenna 230.

[0209] The transceiver unit 220 may perform at least part of the processing of the transmitter / receiver unit described in the above appendix.

[0210] The control unit 210 may perform at least some of the processing of the control unit described in the above-mentioned supplementary notes.

[0211] (Hardware Configuration) Note that the block diagrams used to explain the above embodiments show functional blocks. These functional blocks (components) are realized by any combination of at least one of hardware and software. Furthermore, the method for realizing each functional block is not particularly limited. That is, each functional block may be realized using a single device that is physically or logically coupled, or may be realized using two or more physically or logically separated devices that are directly or indirectly connected (for example, using wires, wirelessly, etc.) and these multiple devices. The functional block may be realized by combining software with the single device or the multiple devices.

[0212] Here, the functions include, but are not limited to, judgment, determination, judgment, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, election, establishment, comparison, assumption, expectation, deeming, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assignment. For example, a functional block (component) that performs transmission may be called a transmitting unit, transmitter, etc. As described above, the implementation method of each is not particularly limited.

[0213] For example, a base station, a user terminal, etc. according to an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. Fig. 8 is a diagram illustrating an example of the hardware configuration of a base station and a user terminal according to an embodiment. The above-described base station 10 and user terminal 20 may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0214] In the present disclosure, the terms apparatus, circuit, device, section, unit, etc. may be used interchangeably. The hardware configurations of the base station 10 and the user terminal 20 may be configured to include one or more of the devices shown in the drawings, or may be configured to exclude some of the devices.

[0215] For example, although only one processor 1001 is shown, there may be multiple processors. Furthermore, processing may be performed by one processor, or processing may be performed by two or more processors simultaneously, serially, or in other ways. Furthermore, processor 1001 may be implemented by one or more chips.

[0216] Each function in the base station 10 and the user terminal 20 is realized, for example, by loading specified software (programs) onto hardware such as a processor 1001 and a memory 1002, causing the processor 1001 to perform calculations, control communication via the communication device 1004, and control at least one of reading and writing data in the memory 1002 and the storage 1003.

[0217] The processor 1001, for example, runs an operating system to control the entire computer. The processor 1001 may be configured as a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, a register, etc. For example, at least a part of the above-mentioned control unit 110 (210), transceiver unit 120 (220), etc. may be realized by the processor 1001.

[0218] The processor 1001 also reads programs (program codes), software modules, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002 and executes various processes in accordance with these. The programs used are those that cause a computer to execute at least some of the operations described in the above-described embodiments. For example, the control unit 110 (210) may be implemented by a control program stored in the memory 1002 and running on the processor 1001, and the other functional blocks may be implemented in a similar manner.

[0219] The memory 1002 is a computer-readable recording medium and may be configured by at least one of, for example, Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically EEPROM (EEPROM), Random Access Memory (RAM), or other suitable storage medium. The memory 1002 may also be referred to as a register, cache, main memory, etc. The memory 1002 may store executable programs (program codes), software modules, etc. for implementing a wireless communication method according to an embodiment of the present disclosure.

[0220] Storage 1003 is a computer-readable recording medium and may be composed of at least one of, for example, a flexible disk, a floppy disk, a magneto-optical disk (e.g., a compact disc (e.g., a Compact Disc ROM (CD-ROM)), a digital versatile disc, a Blu-ray disc), a removable disk, a hard disk drive, a smart card, a flash memory device (e.g., a card, a stick, a key drive), a magnetic stripe, a database, a server, or other suitable storage medium. Storage 1003 may also be referred to as an auxiliary storage device.

[0221] The communication device 1004 is hardware (transmission / reception device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, or a communication module. The communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. to realize at least one of frequency division duplex (FDD) and time division duplex (TDD). For example, the above-mentioned transmission / reception unit 120 (220), transmission / reception antenna 130 (230), etc. may be realized by the communication device 1004. The transmission / reception unit 120 (220) may be implemented as a transmission unit 120a (220a) and a reception unit 120b (220b) that are physically or logically separated.

[0222] The input device 1005 is an input device (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that accepts input from the outside. The output device 1006 is an output device (e.g., a display, a speaker, a light emitting diode (LED) lamp, etc.) that outputs to the outside. Note that the input device 1005 and the output device 1006 may be integrated into one device (e.g., a touch panel).

[0223] Furthermore, each device, such as the processor 1001 and the memory 1002, is connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus, or may be configured using different buses between each device.

[0224] Furthermore, the base station 10 and the user terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), or a field programmable gate array (FPGA), and some or all of the functional blocks may be realized using this hardware. For example, the processor 1001 may be implemented using at least one of these pieces of hardware.

[0225] In addition, the devices included in the core network 30 (for example, network nodes that provide NF) may also be realized by the above-mentioned functional block / hardware configuration.

[0226] (Modifications) Note that terms described in the present disclosure and terms necessary for understanding the present disclosure may be replaced with terms having the same or similar meanings. For example, a channel, a symbol, and a signal (signal or signaling) may be interchangeable. A signal may also be a message. A reference signal may be abbreviated as RS, and may also be called a pilot, pilot signal, etc. depending on the applicable standard. A component carrier (CC) may also be called a cell, frequency carrier, carrier frequency, etc.

[0227] A radio frame may be composed of one or more periods (frames) in the time domain. Each of the one or more periods (frames) constituting a radio frame may be called a subframe. Furthermore, a subframe may be composed of one or more slots in the time domain. A subframe may have a fixed time length (e.g., 1 ms) that is independent of numerology.

[0228] Here, the numerology may be a communication parameter applied to at least one of transmission and reception of a signal or channel, and may indicate at least one of, for example, Subcarrier Spacing (SCS), bandwidth, symbol length, cyclic prefix length, Transmission Time Interval (TTI), number of symbols per TTI, radio frame structure, specific filtering performed by a transceiver in the frequency domain, and specific windowing performed by a transceiver in the time domain.

[0229] A slot may be composed of one or more symbols (such as an Orthogonal Frequency Division Multiplexing (OFDM) symbol or a Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol) in the time domain. A slot may also be a time unit based on numerology.

[0230] A slot may include multiple minislots. Each minislot may consist of one or multiple symbols in the time domain. A minislot may also be called a subslot. A minislot may consist of fewer symbols than a slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a minislot may be called PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a minislot may be called PDSCH (PUSCH) mapping type B.

[0231] A radio frame, a subframe, a slot, a minislot, and a symbol all represent time units for transmitting signals. The radio frame, the subframe, the slot, the minislot, and the symbol may be referred to by other names corresponding to the radio frame, the subframe, the slot, the minislot, and the symbol. Note that the time units such as a frame, a subframe, a slot, a minislot, and a symbol in the present disclosure may be interchangeable.

[0232] For example, one subframe may be referred to as a TTI, or multiple consecutive subframes may be referred to as a TTI, or one slot or one minislot may be referred to as a TTI. That is, at least one of the subframe and the TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (for example, 1-13 symbols), or a period longer than 1 ms. Note that the unit representing the TTI may be called a slot, minislot, etc. instead of a subframe.

[0233] Here, TTI refers to, for example, the smallest time unit for scheduling in wireless communication. For example, in an LTE system, a base station performs scheduling to allocate radio resources (such as frequency bandwidth and transmission power that can be used by each user terminal) to each user terminal in TTI units. Note that the definition of TTI is not limited to this.

[0234] The TTI may be a transmission time unit for a channel-encoded data packet (transport block), a code block, a code word, etc., or may be a processing unit for scheduling, link adaptation, etc. When a TTI is given, the time interval (e.g., the number of symbols) to which a transport block, a code block, a code word, etc. is actually mapped may be shorter than the TTI.

[0235] When one slot or one minislot is called a TTI, one or more TTIs (i.e., one or more slots or one or more minislots) may be the minimum time unit for scheduling. Also, the number of slots (minislots) constituting the minimum time unit for scheduling may be controlled.

[0236] A TTI having a time length of 1 ms may be called a regular TTI (TTI in 3GPP Rel. 8-12), normal TTI, long TTI, regular subframe, normal subframe, long subframe, slot, etc. A TTI shorter than a regular TTI may be called a shortened TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, minislot, subslot, slot, etc.

[0237] In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) may be interpreted as a TTI having a time length of more than 1 ms, and a short TTI (e.g., a shortened TTI, etc.) may be interpreted as a TTI having a TTI length shorter than the TTI length of a long TTI and greater than or equal to 1 ms.

[0238] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may include one or more consecutive subcarriers in the frequency domain. The number of subcarriers included in an RB may be the same regardless of numerology, for example, 12. The number of subcarriers included in an RB may be determined based on numerology.

[0239] In addition, an RB may include one or more symbols in the time domain and may have a length of one slot, one minislot, one subframe, or one TTI, each of which may be composed of one or more resource blocks.

[0240] In addition, one or more RBs may be referred to as a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, etc.

[0241] Furthermore, a resource block may be composed of one or more resource elements (REs). For example, one RE may be a radio resource region of one subcarrier and one symbol.

[0242] A Bandwidth Part (BWP), which may also be referred to as a partial bandwidth, may represent a subset of contiguous common resource blocks (RBs) for a given numerology on a given carrier, where the common RBs may be identified by their index relative to a Common Reference Point of the carrier. PRBs may be defined in a BWP and numbered within the BWP.

[0243] The BWP may include a UL BWP (BWP for UL) and a DL BWP (BWP for DL). One or more BWPs may be configured for a UE within one carrier.

[0244] At least one of the configured BWPs may be active, and the UE may not expect to transmit or receive a given signal / channel outside the active BWP. Note that the terms "cell," "carrier," etc. in this disclosure may be read as "BWP."

[0245] The above-described structures of radio frames, subframes, slots, minislots, symbols, etc. are merely examples. For example, the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, the cyclic prefix (CP) length, etc. may be changed in various ways.

[0246] Furthermore, the information, parameters, etc. described in the present disclosure may be expressed using absolute values, may be expressed using relative values ​​from a predetermined value, or may be expressed using other corresponding information. For example, a radio resource may be indicated by a predetermined index.

[0247] The names used for parameters and the like in this disclosure are not intended to be limiting in any way. Furthermore, the mathematical expressions and the like using these parameters may differ from those explicitly disclosed in this disclosure. The various channels (PUCCH, PDCCH, etc.) and information elements may be identified by any suitable names, and therefore the various names assigned to these various channels and information elements are not intended to be limiting in any way.

[0248] The information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0249] Furthermore, information, signals, etc. may be output from a higher layer to a lower layer and / or from a lower layer to a higher layer. Information, signals, etc. may be input / output via multiple network nodes.

[0250] Input and output information, signals, etc. may be stored in a specific location (for example, memory) or may be managed using a management table. Input and output information, signals, etc. may be overwritten, updated, or added. Output information, signals, etc. may be deleted. Input information, signals, etc. may be transmitted to another device.

[0251] With respect to any information (e.g., variables, constants, parameters) described in the present disclosure, even if not specifically stated in the above embodiments, any first device (e.g., UE / base station) may notify any second device (e.g., base station / UE) of information indicating / specifying (or relating to) the value of the any information.

[0252] The notification of information is not limited to the aspects / embodiments described in the present disclosure, and may be performed using other methods. For example, the notification of information in the present disclosure may be performed by physical layer signaling (e.g., Downlink Control Information (DCI) and Uplink Control Information (UCI)), higher layer signaling (e.g., Radio Resource Control (RRC) signaling, broadcast information (Master Information Block (MIB) and System Information Block (SIB)), Medium Access Control (MAC) signaling), other signals, or a combination thereof.

[0253] Note that the physical layer signaling may be referred to as Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signal), L1 control information (L1 control signal), etc. Furthermore, the RRC signaling may be referred to as an RRC message, such as an RRC Connection Setup message or an RRC Connection Reconfiguration message. Furthermore, the MAC signaling may be notified using, for example, a MAC Control Element (CE).

[0254] Furthermore, notification of specified information (e.g., notification that "it is X") is not limited to explicit notification, but may be made implicitly (e.g., by not notifying the specified information or by notifying other information).

[0255] The determination may be made by a value represented by one bit (0 or 1), by a Boolean value represented by true or false, or by a comparison of numerical values ​​(e.g., comparison with a predetermined value).

[0256] Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.

[0257] Software, instructions, information, etc. may also be transmitted or received over a transmission medium. For example, if software is transmitted from a website, server, or other remote source using wired technologies (such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)), and / or wireless technologies (such as infrared, microwave), these wired and / or wireless technologies are included within the definition of transmission media.

[0258] As used in this disclosure, the terms "system" and "network" may be used interchangeably. A "network" may refer to devices included in the network (e.g., base stations).

[0259] In this disclosure, terms such as "precoding," "precoder," "weight (precoding weight)," "Quasi-Co-Location (QCL)," "Transmission Configuration Indication state (TCI state)," "spatial relation," "spatial domain filter," "transmit power," "phase rotation," "antenna port," "layer," "number of layers," "rank," "resource," "resource set," "beam," "beam width," "beam angle," "antenna," "antenna element," "panel," "UE panel," "transmitting entity," "receiving entity," etc. may be used interchangeably.

[0260] In the present disclosure, the term "antenna port" may be interchangeably read as an antenna port for any signal / channel (e.g., a demodulation reference signal (DMRS) port). In the present disclosure, the term "resource" may be interchangeably read as a resource for any signal / channel (e.g., a reference signal resource, an SRS resource, etc.). The resource may include time / frequency / code / space / power resources. Furthermore, the spatial domain transmission filter may include at least one of a spatial domain transmission filter and a spatial domain reception filter.

[0261] The group may include, for example, at least one of a spatial relationship group, a Code Division Multiplexing (CDM) group, a Reference Signal (RS) group, a Control Resource Set (CORESET) group, a PUCCH group, an antenna port group (e.g., a DMRS port group), a layer group, a resource group, a beam group, an antenna group, a panel group, and the like.

[0262] In addition, in the present disclosure, beam, SRS Resource Indicator (SRI), CORESET, CORESET pool, PDSCH, PUSCH, codeword (CW), transport block (TB), RS, etc. may be read as interchangeable terms.

[0263] In addition, in the present disclosure, the terms TCI state, downlink TCI state (DL TCI state), uplink TCI state (UL TCI state), unified TCI state, common TCI state, joint TCI state, etc. may be read interchangeably.

[0264] Furthermore, in the present disclosure, terms such as "QCL," "QCL assumption," "QCL relationship," "QCL type information," "QCL property / properties," "specific QCL type (e.g., Type A, Type D) property," and "specific QCL type (e.g., Type A, Type D)" may be interchangeable.

[0265] In the present disclosure, terms such as index, identifier (ID), indicator, indication, and resource ID may be interchangeable. In the present disclosure, terms such as sequence, list, set, group, cluster, and subset may be interchangeable.

[0266] Furthermore, the spatial relationship information identifier (ID) (TCI state ID) and the spatial relationship information (TCI state) may be interchangeable. The "spatial relationship information (TCI state)" may be interchangeable with "set of spatial relationship information (TCI state)", "one or more pieces of spatial relationship information", etc. The TCI state and the TCI may be interchangeable. The spatial relationship information and the spatial relationship may be interchangeable.

[0267] In the present disclosure, terms such as "base station (BS)," "radio base station," "fixed station," "NodeB," "eNB (eNodeB)," "gNB (gNodeB)," "access point," "transmission point (TP)," "reception point (RP)," "transmission / reception point (TRP)," "panel," "cell," "sector," "cell group," "carrier," "component carrier," etc. may be used interchangeably. Base stations may also be referred to by terms such as macrocell, small cell, femtocell, picocell, etc.

[0268] A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, the overall coverage area of ​​the base station can be partitioned into multiple smaller areas, and each smaller area can be provided with communication service by a base station subsystem (e.g., a small indoor base station (Remote Radio Head (RRH))). The terms "cell" or "sector" refer to part or all of the coverage area of ​​a base station and / or base station subsystem that provides communication service within that coverage.

[0269] In the present disclosure, a base station transmitting information to a terminal may be interpreted as the base station instructing the terminal to control / operate based on the information.

[0270] In this disclosure, the terms "Mobile Station (MS)," "user terminal," "User Equipment (UE)," "terminal," etc. may be used interchangeably.

[0271] A mobile station may also be referred to as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable terminology.

[0272] At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a wireless communication device, etc. Note that at least one of the base station and the mobile station may be a device mounted on a moving object, the moving object itself, etc.

[0273] The mobile body is a movable object that can move at any speed and naturally includes cases where the mobile body is stationary. Examples of the mobile body include, but are not limited to, vehicles, transport vehicles, automobiles, motorcycles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, handcars, rickshaws, ships and other watercraft, airplanes, rockets, satellites, drones, multicopters, quadcopters, balloons, and objects mounted thereon. The mobile body may also be a mobile body that moves autonomously based on an operation command.

[0274] The mobile object may be a vehicle (e.g., a car, an airplane, etc.), an unmanned mobile object (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). Note that at least one of the base station and the mobile station may also include devices that do not necessarily move during communication operations. For example, at least one of the base station and the mobile station may be an Internet of Things (IoT) device such as a sensor.

[0275] 9 is a diagram showing an example of a vehicle according to an embodiment. The vehicle 40 includes a drive unit 41, a steering unit 42, an accelerator pedal 43, a brake pedal 44, a shift lever 45, left and right front wheels 46, left and right rear wheels 47, axles 48, an electronic control unit 49, various sensors (including a current sensor 50, an RPM sensor 51, an air pressure sensor 52, a vehicle speed sensor 53, an acceleration sensor 54, an accelerator pedal sensor 55, a brake pedal sensor 56, a shift lever sensor 57, and an object detection sensor 58), an information service unit 59, and a communication module 60.

[0276] The drive unit 41 is configured with at least one of an engine, a motor, and a hybrid of an engine and a motor, for example. The steering unit 42 includes at least a steering wheel (also called a handle) and is configured to steer at least one of the front wheels 46 and the rear wheels 47 based on the operation of the steering wheel operated by a user.

[0277] The electronic control unit 49 is composed of a microprocessor 61, memory (ROM, RAM) 62, and a communication port (for example, an input / output (IO) port) 63. Signals are input to the electronic control unit 49 from various sensors 50-58 provided in the vehicle. The electronic control unit 49 may also be called an Electronic Control Unit (ECU).

[0278] The signals from the various sensors 50-58 include a current signal from a current sensor 50 that senses the current of the motor, a rotation speed signal of the front wheels 46 / rear wheels 47 obtained by a rotation speed sensor 51, an air pressure signal of the front wheels 46 / rear wheels 47 obtained by an air pressure sensor 52, a vehicle speed signal obtained by a vehicle speed sensor 53, an acceleration signal obtained by an acceleration sensor 54, a depression amount signal of the accelerator pedal 43 obtained by an accelerator pedal sensor 55, a depression amount signal of the brake pedal 44 obtained by a brake pedal sensor 56, an operation signal of the shift lever 45 obtained by a shift lever sensor 57, and a detection signal for detecting obstacles, vehicles, pedestrians, etc. obtained by an object detection sensor 58.

[0279] The information service unit 59 is composed of various devices, such as a car navigation system, an audio system, speakers, a display, a television, and a radio, for providing (outputting) various information such as driving information, traffic information, and entertainment information, and one or more ECUs for controlling these devices. The information service unit 59 uses information acquired from external devices via the communication module 60 or the like to provide various information / services (e.g., multimedia information / multimedia services) to the occupants of the vehicle 40.

[0280] The information service unit 59 may include input devices (e.g., keyboards, mice, microphones, switches, buttons, sensors, touch panels, etc.) that accept input from the outside, and may also include output devices (e.g., displays, speakers, LED lamps, touch panels, etc.) that output to the outside.

[0281] The driving assistance system unit 64 includes various devices for providing functions to prevent accidents and reduce the driver's driving burden, such as millimeter-wave radar, Light Detection and Ranging (LiDAR), cameras, positioning locators (e.g., Global Navigation Satellite System (GNSS)), map information (e.g., High Definition (HD) maps, Autonomous Vehicle (AV) maps), gyro systems (e.g., Inertial Measurement Units (IMUs), Inertial Navigation Systems (INSs)), artificial intelligence (AI) chips, and AI processors, as well as one or more ECUs that control these devices. The driving assistance system unit 64 also transmits and receives various information via the communication module 60 to realize driving assistance functions or autonomous driving functions.

[0282] The communication module 60 can communicate with the microprocessor 61 and components of the vehicle 40 via the communication port 63. For example, the communication module 60 transmits and receives data (information) via the communication port 63 to and from the drive unit 41, steering unit 42, accelerator pedal 43, brake pedal 44, shift lever 45, left and right front wheels 46, left and right rear wheels 47, axles 48, the microprocessor 61 and memory (ROM, RAM) 62 in the electronic control unit 49, and the various sensors 50-58, which are provided in the vehicle 40.

[0283] The communication module 60 is a communication device that can be controlled by the microprocessor 61 of the electronic control unit 49 and can communicate with an external device. For example, it transmits and receives various information to and from the external device via wireless communication. The communication module 60 may be located either inside or outside the electronic control unit 49. The external device may be, for example, the base station 10 or the user terminal 20 described above. Furthermore, the communication module 60 may be, for example, at least one of the base station 10 and the user terminal 20 described above (or may function as at least one of the base station 10 and the user terminal 20).

[0284] The communication module 60 may transmit at least one of signals from the above-mentioned various sensors 50-58 input to the electronic control unit 49, information obtained based on the signals, and information based on input from the outside (user) obtained via the information service unit 59 to an external device via wireless communication. The electronic control unit 49, the various sensors 50-58, the information service unit 59, etc. may be referred to as input units that accept input. For example, the PUSCH transmitted by the communication module 60 may include information based on the above-mentioned input.

[0285] The communication module 60 receives various information (traffic information, traffic signal information, vehicle distance information, etc.) transmitted from an external device and displays it on an information service unit 59 provided in the vehicle. The information service unit 59 may also be called an output unit that outputs information (for example, outputs information to a device such as a display or speaker based on the PDSCH received by the communication module 60 (or data / information decoded from the PDSCH)).

[0286] Furthermore, the communication module 60 stores various information received from external devices in a memory 62 that can be used by the microprocessor 61. Based on the information stored in the memory 62, the microprocessor 61 may control the drive unit 41, steering unit 42, accelerator pedal 43, brake pedal 44, shift lever 45, left and right front wheels 46, left and right rear wheels 47, axles 48, various sensors 50-58, and the like provided in the vehicle 40.

[0287] Furthermore, a base station in the present disclosure may be read as a user terminal. For example, the aspects / embodiments of the present disclosure may be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between multiple user terminals (which may be called, for example, Device-to-Device (D2D) or Vehicle-to-Everything (V2X)). In this case, the user terminal 20 may be configured to have the functions of the base station 10 described above. Furthermore, terms such as "uplink" and "downlink" may be read as terms corresponding to terminal-to-terminal communication (for example, "sidelink"). For example, terms such as an uplink channel and a downlink channel may be read as a sidelink channel.

[0288] Similarly, the user terminal in the present disclosure may be read as a base station, in which case the base station 10 may be configured to have the functions of the user terminal 20 described above.

[0289] In the present disclosure, an operation described as being performed by a base station may be performed by its upper node in some cases. It is apparent that in a network including one or more network nodes having a base station, various operations performed for communication with a terminal may be performed by the base station, one or more network nodes other than the base station (such as, but not limited to, a Mobility Management Entity (MME), a Serving-Gateway (S-GW), etc.), or a combination thereof.

[0290] Each aspect / embodiment described in this disclosure may be used alone, in combination, or switched depending on the implementation. Furthermore, the order of the processing procedures, sequences, flowcharts, etc. of each aspect / embodiment described in this disclosure may be changed unless inconsistent. For example, the methods described in this disclosure present elements of various steps using an example order, and are not limited to the particular order presented.

[0291] Each aspect / embodiment described in the present disclosure may be a technology other than Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 6th generation mobile communication system (6G), xth generation mobile communication system (xG (x is, for example, an integer or decimal number)), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New radio access (NX), Future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.17 (WiMAX (registered trademark)), IEEE 802.19 (WiMAX (registered trademark)), IEEE 802.20 (WiMAX (registered trademark)), IEEE 802.21 (Wi-Fi (registered trademark)), IEEE 802.22 (WiMAX (registered trademark)), IEEE 802.23 (WiMAX (registered trademark)), IEEE 802.24 (WiMAX (registered trademark)), IEEE 802.25 (WiMAX (registered trademark)), IEEE 802.26 (WiMAX (registered trademark)), IEEE 802.27 (WiMAX (registered trademark)), IEEE 802.28 (WiMAX (registered trademark)), IEEE 802.29 (WiMAX (registered trademark)), IEEE 802.30 (WiMAX (registered trademark)), IEEE 802.31 (Wi-Fi (registered trademark)), IEEE 802.32 (WiMAX (registered trademark)), IEEE 802.33 (WiMAX (registered trademark)), IEEE 802. The present invention may be applied to systems that use IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), or other suitable wireless communication methods, or to next-generation systems that are expanded, modified, created, or defined based on these. Furthermore, the present invention may be applied to a combination of multiple systems (e.g., a combination of LTE or LTE-A and 5G).

[0292] As used in this disclosure, the phrase "based on" does not mean "based only on," unless expressly stated otherwise. In other words, the phrase "based on" means both "based only on" and "based at least on."

[0293] As used in this disclosure, any reference to an element using a designation such as "first," "second," etc. does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, a reference to a first and a second element does not imply that only two elements may be employed or that the first element must in some way precede the second element.

[0294] The term "determining" as used in this disclosure may encompass a wide variety of actions. For example, "determining" may be considered to be judging, calculating, computing, processing, deriving, investigating, looking up, search, inquiry (e.g., looking up in a table, database, or another data structure), ascertaining, etc.

[0295] Additionally, "determining" may be considered to be "determining" receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in memory), etc.

[0296] Furthermore, "determination" may be considered to be "determining" resolving, selecting, choosing, establishing, comparing, etc. In other words, "determination" may be considered to be "determining" some kind of action. In the present disclosure, "determination" may be read interchangeably with the above-mentioned actions.

[0297] Furthermore, in this disclosure, "determine / determining" may be interchangeably read as "assume / assuming," "expect / expecting," "consider / considering," etc. Furthermore, in this disclosure, "does not expect to do..." may be interchangeably read as "assumes not to do...."

[0298] In the present disclosure, "expect" may be interchangeably read as "be expected." For example, "expect(s) ..." ("..." may be expressed, for example, as a that clause, a to-infinitive, etc.) may be interchangeably read as "be expected ..." or "do ... (if the above "..." is a to-infinitive, a verb with "to")," etc. "does not expect ..." may be interchangeably read as "be not expected ..." or "does not ... (if the above "..." is a to-infinitive, a verb with "to")," etc. Furthermore, "An apparatus A is not expected ..." may be interchangeably read as "an apparatus B other than apparatus A does not expect ... from apparatus A" (for example, if apparatus A is a UE, apparatus B may be a base station).

[0299] The "maximum transmit power" in this disclosure may mean the maximum value of transmit power, the nominal UE maximum transmit power, or the rated UE maximum transmit power.

[0300] As used in this disclosure, the terms "connected," "coupled," or any variation thereof, refer to any direct or indirect connection or coupling between two or more elements, and may include the presence of one or more intermediate elements between two elements that are "connected" or "coupled" to each other. The coupling or connection between elements may be physical, logical, or a combination thereof. For example, "connected" may be read as "access."

[0301] In this disclosure, when two elements are connected, they may be considered to be "connected" or "coupled" to one another using one or more wires, cables, printed electrical connections, etc., as well as using electromagnetic energy having wavelengths in the radio frequency range, microwave range, light (both visible and invisible) range, etc., as some non-limiting and non-exhaustive examples.

[0302] In the present disclosure, the term "A and B are different" may mean "A and B are different from each other." The term may also mean "A and B are each different from C." Terms such as "separate" and "coupled" may also be interpreted in the same way as "different."

[0303] When the terms "include," "including," and variations thereof are used in this disclosure, these terms are intended to be inclusive, similar to the term "comprising." Furthermore, when the term "or" is used in this disclosure, it is not intended to be an exclusive or.

[0304] In this disclosure, where articles are added by translation, such as a, an, and the in English, the disclosure may include that the nouns following these articles are in the plural form.

[0305] In the present disclosure, terms such as "less than or equal to," "less than," "greater than," "more than," "equal to," etc. may be interchangeable. Furthermore, in the present disclosure, terms meaning "good," "bad," "big," "small," "high," "low," "fast," "slow," "wide," "narrow," etc. may be interchangeable, not limited to the positive, comparative, and superlative. Furthermore, in the present disclosure, terms meaning "good," "bad," "big," "small," "high," "low," "fast," "slow," "wide," "narrow," etc. may be interchangeable, not limited to the positive, comparative, and superlative, as expressions with "i-th" (i is an arbitrary integer) attached (for example, "highest" may be interchangeable with "i-th highest").

[0306] In this disclosure, the terms "of," "for," "regarding," "related to," "associated with," etc. may be read interchangeably.

[0307] In the present disclosure, terms such as "when A, B," "if A, (then) B," "B upon A," "B in response to A," "B based on A," "B during / while A," "B before A," "B at (the same time as) / on A," "B after A," "B since A," and "B until A" may be interchangeable. Note that A, B, and the like herein may be replaced with appropriate expressions such as nouns, gerunds, and regular sentences, depending on the context. Note that the time difference between A and B may be approximately zero (immediately after or immediately before). A time offset may also be applied to the time at which A occurs. For example, "A" may be interchangeable with "before / after a time offset at which A occurs." The time offset (eg, one or more symbols / slots) may be predefined or may be specified by the UE based on signaled information.

[0308] In the present disclosure, timing, time, duration, time instance, any time unit (e.g., slot, subslot, symbol, subframe), period, occasion, resource, etc. may be read interchangeably.

[0309] Although the invention according to the present disclosure has been described in detail above, it is clear to those skilled in the art that the invention according to the present disclosure is not limited to the embodiments described in the present disclosure. The description of the present disclosure is for illustrative purposes only and does not impose any limiting meaning on the invention according to the present disclosure.

Claims

1. A terminal having: a receiving unit that receives information used to determine a mobility state; and a control unit that determines a mobility state based on the information, and when the terminal is in a specific mobility state, determines whether a specific event condition is met, and when the specific event condition is met, executes a specific process.

2. The terminal of claim 1, wherein the specific process is at least one of measurement, reporting, Radio Resource Control (RRC) reconfiguration, and cell switch.

3. The terminal according to claim 1, wherein the control unit changes the conditions of the specific event based on the mobility state.

4. The terminal according to claim 1, wherein the control unit executes the specific process when conditions of a plurality of the specific events are satisfied.

5. A wireless communication method for a terminal, comprising: a step of receiving information used to determine a mobility state; a step of determining a mobility state based on the information, and if the terminal is in a specific mobility state, determining whether a specific event condition is met, and if the specific event condition is met, executing a specific process.

6. A base station having: a transmitting unit that transmits information used to determine a mobility state; and a control unit that determines a mobility state based on the information, determines whether a specific event condition is met when the terminal is in a specific mobility state, and executes specific processing when the specific event condition is met.

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