RU2785295C1 - Terminal - Google Patents

Abstract

FIELD: communication technology.

SUBSTANCE: invention relates to the field of communication. The terminal contains a receiving module configured to receive a configuration from the base station related to at least one of the measurement and message; a control module configured to perform a measurement based on the specified configuration related to at least one of the measurement and message; and a transmission module made with the possibility of transmitting a measurement report to the base station based on the result of the measurement performed. The control module is designed with the possibility of limiting the period related to the specified measurement, and with the possibility of changing the number of acts of performing an operation related to the specified measurement when the terminal is located in specific conditions.

EFFECT: ability to perform measurements taking into account the conditions of mobile communication when driving at high speed.

5 cl, 15 dwg

Description

The field of technology to which the invention belongs

The present invention relates to a terminal for a radio communication system.

State of the art

For the New Radio (NR) scheme, also called 5G and replacing the Long Term Evolution (LTE) scheme, technologies are being discussed that should ensure that the system meets, for example, the following requirements: network capacity, higher data rates, reduced latency, simultaneous connection with a large number of terminals, low cost, and improved energy efficiency (see, for example, Non-Patent Document 1).

In the Radio Resource Management (RRM) performed in the NR system, as a prerequisite for the measurement, radio link monitoring (RLM) performed by the terminal and the beam quality measurement and reporting, for example, the period of the reference signal of the target object measurement and the delay allowed during the measurement operation, depending on the number of samples required for this measurement. The measurement result is used, for example, to determine whether a handover is necessary or to determine the synchronized (In-Sync, IS) or out-of-sync (Out-Of-Sync, OOS) line state in the RLM (see, for example, Non-Patent Document 2) .

[prior art documents]

[Non-Patent Documents]

[Non-Patent Document 1] 3GPP TS 38.300 V15.5.0 (2019-03).

[Non-Patent Document 2] 3GPP TS 38.133 V15.5.0 (2019-03).

Brief description of the invention

Disadvantage eliminated by the invention

In an NR system, the terminal must perform the measurement in accordance with the RRM specification for NR. However, the RRM specification for NR is highly flexible. For example, it is possible to change the period of the synchronization signal block and the physical broadcast channel (SS/PBCH block, SSB), the Channel State Information Reference Signal (CSI-RS), or the SSB-based measurement timing configuration ( English SSB-based measurement timing configuration, SMTC). Therefore, in some configurations related to RRM, a full measurement may not be possible, especially in a mobile communication environment when driving at high speed, an example of which is a High Speed Train (HST).

The present invention has been made in connection with the above-described shortcoming, and the purpose of the present invention is to allow a terminal in a radio communication system to perform measurement based on conditions.

Remedy

The present invention provides a terminal comprising a receiving module configured to receive from a base station a configuration related to at least one of a measurement and a message, a control module configured to perform a measurement based on said configuration related to at least one of the measurement and the message, and a transmission module configured to transmit to the base station a measurement report based on the measurement result. The control module is configured to limit the period related to the specified measurement, or to change the number of acts of performing the operation related to the specified measurement, depending on whether the terminal is in specific conditions.

The technical result of the invention

An aspect of the present invention enables a terminal in a radio communication system to perform a conditional measurement.

Brief description of the drawings

Fig. 1 is a diagram of a radio communication system according to one embodiment of the present invention.

Fig. 2 is a diagram of a radio communication system according to one embodiment of the present invention.

Fig. 3 is a sequence diagram of steps in an operation example for reporting a capability to a UE.

Fig. 4 is a flowchart in an example of a measurement operation.

Fig. 5 is a flowchart of an example (1) of a measurement operation according to one embodiment of the present invention.

Fig. 6 is a flowchart of an example (2) of a measurement operation according to one embodiment of the present invention.

Fig. 7 is a flowchart of an example (1) of a period limitation operation according to one embodiment of the present invention.

Fig. 8 is a flowchart of an example (2) of a period limitation operation according to one embodiment of the present invention.

Fig. 9 shows an example (1) of period limitation according to one embodiment of the present invention.

Fig. 10 represents an example (2) of period limitation according to one embodiment of the present invention.

Fig. 11 represents an example (3) of period limitation according to one embodiment of the present invention.

Fig. 12 shows an example (4) of period limitation according to one embodiment of the present invention.

Fig. 13 is an example of a functional diagram of a base station 10 according to one embodiment of the present invention.

Fig. 14 is an example of a functional diagram of a terminal 20 according to one embodiment of the present invention.

Fig. 15 shows an example of a hardware configuration of a base station 10 or a terminal 20 according to one embodiment of the present invention.

Implementation of the invention

Next, with reference to the accompanying drawings, embodiments of the present invention will be described. The embodiments described below are examples, and the present invention is not limited to these embodiments.

In the operations of a radio communication system according to one embodiment of the present invention, technologies of the prior art may be used where required. A non-limiting example of such prior art technologies are existing LTE technologies. In this application, unless otherwise indicated, the term "LTE" has a broad meaning, covering the advanced system of LTE (eng. LTE-Advanced) and systems following LTE-Advanced (eg, NR).

In the following embodiments of the present invention, terms from the existing LTE are used, for example, "synchronization signal" (eng. Synchronization Signal, SS), "primary synchronization signal" (eng. Primary SS, PSS), "secondary synchronization signal" (eng. Secondary SS, SSS), "Physical Broadcast Channel" (Physical Broadcast Channel, RVSN) and "Physical Random Access Channel" (Physical Random Access Channel, PRACH). These terms are used for convenience of description, and the same signals and function modules may be referred to differently. In NR, the above terms correspond to NR-SS, NR-PSS, NR-SSS, NR-PBCH and NR-PRACH. However, even if a signal is used in NR, the prefix "NR-" is not necessarily present in its designation.

In embodiments of the present invention, the duplex scheme may be Time Division Duplex (TDD), Frequency Division Duplex (FDD), or any other scheme (e.g., flexible duplex scheme).

In embodiments of the present invention, "configuring" radio parameters may mean setting these parameters to predetermined values or to values transmitted from base station 10 or from terminal 20.

Fig. 1 is a diagram of a radio communication system according to one embodiment of the present invention. As shown in FIG. 1, a wireless communication system in one embodiment of the present invention includes a base station 10 and a terminal 20. Although in FIG. 1 shows one base station 10 and one terminal 20, this is just an example, and a plurality of base stations and a plurality of terminals may be provided.

The base station 10 is a communication device configured to form one or more cells and perform wireless communication with the terminal 20. The physical resource of the radio signal is defined in the time domain and in the frequency domain. The time domain may be determined by the number of Orthogonal Frequency Division Multiplexing (OFDM) symbols, and the frequency domain may be determined by the number of subcarriers or the number of resource blocks. The base station 10 is configured to transmit synchronization signals and system information to the terminal 20 . Said synchronization signals are, for example, NR-PSS and NR-SSS. This system information is transmitted via NR-PBCH, for example, and is also called broadcast information. As shown in FIG. 1, the base station 10 is configured to transmit a control or data signal via the downlink to the terminal 20 and to receive the control or data signal via the uplink from the terminal 20. The base station 10 and the terminal 20 are configured to transmit and receive signals using shaping. beam.

The terminal 20 is a communication device, such as a smartphone, a mobile phone, a tablet, a handheld terminal, or a communication module for machine-to-machine (M2M) communication, containing the radio communication functional module. As shown in FIG. 1, the terminal 20 is configured to use a variety of communication services provided by said radio communication system by receiving a control signal or data from the base station 10 via the downlink and transmitting the control signal or data to the base station 10 via the uplink.

An object according to one embodiment of the present invention is to improve communication performance when the terminal 20 is in mobile communication conditions while moving at high speed, as shown in FIG. 1. High speed mobile communication conditions are, for example, conditions in which the terminal 20 is moving at high speed in a high speed train (HST).

Fig. 2 represents an example of a configuration of a radio communication system according to one embodiment of the present invention. In FIG. 2 shows a diagram of a radio communication system in a dual connection configuration using multiple radio access technologies (Multi-RAT Dual Connectivity, MR-DC).

As shown in FIG. 2, the terminal 20 is configured to communicate with the NR system base station 10A and the NR system base station 10B (hereinafter, if it is not necessary to distinguish between the base station 10A and the base station 10B, these base stations may be referred to as the base station(s) 10). In addition, terminal 20 supports dual NR-NR connection, i. e. NR-DC, in which base station 10A serves as the Master Node (MN) and base station 10B serves as the Secondary Node (SN). The terminal 20 is configured to simultaneously transmit or simultaneously receive with the base station 10A as the main node and with the base station 10B as the secondary node by simultaneously using a plurality of elementary carriers provided by the base station 10A, which is the main node, and the base station 10B, which is the secondary node. Cells belonging to the master node may be referred to as the main cell group, and cells belonging to the secondary node may be referred to as the secondary cell group.

In addition, as shown in FIG. 2, the terminal 20 is configured to communicate with the base station 10A of the LTE system and with the base station 10B of the NR system. Further, the terminal 20 supports dual LTE-NR connection, i. e. EN-DC, in which the base station 10A serves as the MN and the base station 10B serves as the SN. The terminal 20 is configured to simultaneously transmit or simultaneously receive with the base station 10A, which is the main node, and with the base station 10B, which is the secondary node, by simultaneously using a plurality of elementary carriers provided by the base station 10A and the base station 10B.

In addition, as shown in FIG. 2, the terminal 20 is configured to communicate with the base station 10A of the NR system and with the base station 10B of the LTE system. Further, terminal 20 supports dual NR-LTE connection, i. e. NE-DC (NR-E-UTRA Dual Connectivity) in which base station 10A serves as an MN and base station 10B serves as an SN. The terminal 20 is configured to simultaneously transmit or simultaneously receive with the base station 10A, which is the main node, and with the base station 10B, which is the secondary node, by simultaneously using a plurality of elementary carriers provided by the base station 10A and the base station 10B.

In addition, as shown in FIG. 2, terminal 20 is configured to communicate with base station 10A of the NR system and with base station 10B of the NR system. Further, terminal 20 supports dual NR-NR connection, i. e. NR-DC, in which the base station 10A serves as the MN and the base station 10B serves as the SN. The terminal 20 is configured to simultaneously transmit or simultaneously receive with the base station 10A, which is the main node, and with the base station 10B, which is the secondary node, by simultaneously using a plurality of elementary carriers provided by the base station 10A and the base station 10B.

In addition, as shown in FIG. 2, terminal 20 is configured to communicate with an LTE base station 10A and an LTE base station 10B. Further, the terminal 20 is configured to support dual LTE-LTE connection, i. e. LTE-DC, in which the base station 10A serves as the MN and the base station 10B serves as the SN. The terminal 20 is configured to simultaneously transmit or simultaneously receive with the base station 10A, which is the main node, and with the base station 10B, which is the secondary node, by simultaneously using a plurality of elementary carriers provided by the base station 10A and the base station 10B.

Fig. 3 is a flow chart of an example of a measurement operation. In step S21, the base station 10 transmits information about the measurement configurations to the terminal 20. The specified measurement configuration information contains an event. Then, in step S22, based on the received measurement configuration information, the terminal 20 performs measurement. Then, in step S23, when the condition set by the above event regarding the measurement result is met, the terminal 20 transmits a measurement report to the base station 10.

The result of the measurement can be signal intensity (for example, Reference Signal Received Power (RSRP)) or signal quality (for example, Reference Signal Received Quality, RSRQ) or the ratio of signal power to total interference and noise power (Signal to Interference Plus Noise Power Ratio, SINR)). The measurement result can be determined at any level. For example, the measurement result may be determined at level 1 or at level 3. The measurement result may correspond to a single measurement or to measurements obtained by filtering a plurality of measurements.

In LTE, a standard specification for HST is defined in order to ensure communication efficiency in a mobile environment when moving at high speed. For example, Idle mode measurement delay reduction and Established mode and Discontinuous Reception (DRX) measurement delay reduction are defined in the UE capability as optional features applicable only to the main cell.

Additionally, as operations for HST, calculated for example for a maximum speed of 500 km/h, the following points a) to d) are considered:

a) cell reselection condition for the primary cell in idle mode;

b) uplink timing;

c) primary cell measurement condition in DRX mode;

d) radio link tracking (RLM).

In addition, as operations for HST in the case of carrier aggregation, for example, the following items e) to e):

e) measurement conditions for deactivated secondary cells;

f) measurement conditions for secondary cells in DRX mode;

g) delay associated with secondary cell activation.

At the same time, in NR, unlike in LTE, the cell reference signal (CRS) is not always transmitted, but the transmission period of the SS / PBCH block (SSB) or the channel state information reference signal (CSI-RS) used for radio link measurement or tracking (RLM), and the period of SS/PBCH block based measurement time configuration (SMTC) can be configured. However, if a long SSB or CSI-RS transmission period is set in a mobile communication environment while driving at high speed, such as in an HST environment, it may not be possible to measure with the required number of samples. Measurement with the required number of samples may also not be possible if a long SMTC period is set. Likewise, when performing RLM, it may not be possible to use a sufficient measurement period or a sufficient number of samples.

In addition, NR defines operations related to control in different radio access technologies in dual connection and beam steering. Accordingly, under mobile communication conditions, when driving at high speed, such as under HST conditions, it may be desirable to perform optimal control or operation corresponding to such conditions. For example, if a long SSB transmission period, CSI-RS transmission period, or L1-RSRP message period is specified, it may not be possible to perform a measurement with the required number of samples. In addition, if the same number of simultaneously measured beams is set for normal conditions as for HST conditions, an unreasonably large number of beams will have to be measured, which may increase the power consumption and cost of the terminal.

From the foregoing, it is clear that if the operation rules for the NR are not defined in the HST, then the implementation of a stable connection in a mobile environment when moving at high speed may be difficult. Therefore, in the present invention, proper terminal operations in HST are determined for NR, which makes it possible to reduce the power consumption or cost of the terminal and ensure the terminal performance and connection stability in a mobile communication environment when moving at a high speed.

Fig. 4 is a sequence diagram of steps in an example operation for reporting a capability to a UE. With reference to FIG. 4 describes an example of determining whether the conditions are HST conditions, in other words, whether the HST case is applicable.

In step S11, the base station 10 transmits a UE capability request to the terminal 20. Said UE capability request may contain information indicating what type of UE capability is being requested. Then, the terminal 20 transmits a UE capability report (UE capability information) to the base station 10 . For example, terminal 20 may include HST related information in the UE capability report. For example, terminal 20 may include information indicative of a supported travel speed (eg, 350 km/h or 500 km/h) in the UE capability report. In addition, for example, the terminal 20 may include in the UE capability report information indicating the measurement capability. Information indicating the technical feasibility of the measurement is, for example, the number of measurements required to perform the measurement, or the class of measurement that provides satisfactory measurement accuracy.

Another possibility is for base station 10 to transmit HST information to terminal 20 via signaling. Said information about the HST may be, for example, the information specified in one of the following points 1)-3):

1) a possible scenario in the network environment (for example, in a single frequency network for HST (English HST-Single Frequency Network, SFN), or inside or outside the tunnel);

2) how the station is placed in the network environment (eg, beam pattern: unidirectional or bidirectional);

3) PRACH setting reported from the network (eg, PRACH failure detection conditions defined in LTE: "normal mode", "restricted set type A for high speed mode" and "restricted set type B for high speed mode").

For p.p. 1)-3) new signaling can be defined; signaling can be carried out using existing signaling; or the signaling may be done by evolving the signaling defined for LTE to be NR compliant.

The following describes how to set up UE operations or network configurations for HST. This assumes that terminal 20 has HST capability and can determine if it is in HST conditions.

Fig. 5 is a flowchart of an example (1) of a measurement operation according to one embodiment of the present invention. With reference to FIG. 5 describes in detail the measurement performed in step S22 of FIG. 3. The terminal 20 is configured to change the operation related to cell detection or cell measurement, depending on whether the terminal 20 is in HST conditions. For example, terminal 20 may change the number of samples used for cell acquisition or measurement, i. e. the number of measurement acts performed in order for the measurement to be considered completed.

In step S2201, the terminal 20 checks whether the HST conditions are present. If the HST conditions are met (YES in step S2201), then the operation proceeds to step S2202. If the HST conditions do not hold (NO in step S2201), then the operation proceeds to step S2203. In step S2202, the terminal 20 performs Y-sampling measurement. On the other hand, if the jump to step S2203 is made, the terminal 20 performs measurement with X samples, where X is greater than Y. Thus, the number of samples of X is greater than the number of samples of Y. According to the above, under the HST condition, the terminal 20 can perform measurement with fewer samples. than outside the HST conditions.

In addition, under HST conditions, terminal 20 may use a lower minimum measurement delay value than outside HST conditions, or may not use the specified minimum value. Specifying a minimum measurement delay value makes it possible to prevent the terminal 20 from reducing the measurement delay more than necessary.

Fig. 6 is a flowchart of an example (2) of a measurement operation according to one embodiment of the present invention. With reference to FIG. 6 describes in detail the measurement performed in step S22 of FIG. 3. The terminal 20 is configured to change the operation related to cell detection or cell measurement, depending on whether the terminal 20 is in HST conditions. For example, when the terminal 20 is in HST conditions, an SSB transmission period, a CSI-RS transmission period, an SMTC period, a Measurement Gap (MG) period, a secondary cell measurement period, or a DRX cycle that may be set in the base terminal 20 station 10 may be limited. Alternatively, the terminal 20 may change the measurement period based on the predetermined period. In addition, the terminal 20 may change its operation according to the predetermined period. In the following descriptions, the SSB transmission period, the CSI-RS transmission period, the SMTC period, the MG period, or the measurement period of the secondary cell may correspond to the period of the measurement operation performed by the terminal 20 based on the period determined by the base station 10. In addition, for example, limiting said predetermined period may be considered as a limitation on the period of the measurement operation performed by the terminal 20. Further, the DRX period may correspond to the period of the DRX operation performed by the terminal 20 based on the DRX period determined by the base station 10, and the limitation of the set DRX period may be regarded as the limitation of the period of the DRX operation performed by the terminal twenty.

In step S2211, the terminal 20 checks whether the HST conditions are present. If the HST conditions are met (YES in step S2211), then the operation proceeds to step S2212. If the HST conditions do not hold (NO in step S2211), then the operation proceeds to step S2213. In step S2213, the terminal 20 performs measurement with X measurements. On the other hand, if the jump to step S2212 is made, the terminal 20 checks whether the period is less than or equal to the threshold value. If the period is less than or equal to the threshold value (YES in step S2212), then the operation proceeds to step S2214. If the period is greater than the threshold value (NO in step S2212), then the operation proceeds to step S2215. In step S2214, the terminal 20 performs Y-sampling measurement. On the other hand, if jump to step S2215 is made, the terminal 20 performs Z-sampling measurement.

With respect to the quantities X, Y, Z of measurements, the condition X>Y>Z is satisfied. The specified threshold value is, for example, 40 ms, 80 ms or 640 ms. The specified period is, for example, one or more of an SSB transmission period, a CSI-RS transmission period, an SMTC period, an MG period, a secondary cell measurement period, and a DRX period. As mentioned above, under HST conditions, the terminal 20 may perform measurement using a different number of samples depending on the period type. The same threshold value may be used for the SSB transmission period, the CSI-RS transmission period, the SMTC period, the MG period, and the secondary cell measurement period, or different threshold values may be used.

Fig. 7 is a flowchart of an example (1) of a period limitation operation according to one embodiment of the present invention. The terminal 20 is configured to change the operation related to cell acquisition or measurement based on whether the terminal 20 is in HST conditions. For example, terminal 20 may limit the SSB transmission period, CSI-RS transmission period, SMTC period, MG period, secondary cell measurement period, and DRX period to be configurable, and may change the operation according to the period type.

In step S301, the terminal 20 checks whether the HST conditions are present. If the HST conditions are met (YES in step S301), then the operation proceeds to step S302. If the HST conditions do not hold (NO in step S301), then the operation proceeds to step S303. In step S302, the terminal 20 limits the period T to a value less than 40 ms. On the other hand, if the transition to step S303 has been made, the terminal 20 does not limit the period T. The period T may be any of an SSB transmission period, a CSI-RS transmission period, an SMTC period, an MG period, a secondary cell measurement period, and a DRX period.

Fig. 8 is a flowchart of an example (2) of a period limitation operation according to one embodiment of the present invention. In FIG. 8 shows an operation in which more than one threshold value is used to limit the period according to FIG. Each period of T1 and T2 in FIG. 8 may be any of an SSB transmission period, a CSI-RS transmission period, an SMTC period, an MG period, a secondary cell measurement period, and a DRX period. Period T1 and period T2 may be periods of the same type or different types.

In step S311, the terminal 20 checks whether the HST conditions are present. If the HST conditions are met (YES in step S311), then the operation proceeds to step S312. If the HST conditions do not hold (NO in step S311), then the operation proceeds to step S313. In step S313, the terminal 20 does not limit the periods T. In step S312, the terminal 20 checks whether the speed is less than or equal to 350 km/h. If the speed is less than or equal to 350 km/h (YES in step S312), then operation proceeds to step S314. If the speed is greater than 350 km/h (NO in step S312), then the operation proceeds to step S315. In step S314, the terminal 20 limits the period T1 to a value less than 80 ms. In step S315, the terminal 20 checks whether the speed is less than or equal to 500 km/h. If the speed is less than or equal to 500 km/h (YES in step S315), then operation proceeds to step S316. If the speed is greater than 500 km/h (NO in S315), the operation ends. In step S316, the terminal 20 limits the period T2 to a value less than 40 ms. Here, an indication that the speed is less than or equal to 350 km/h or 500 km/h may mean that the actual running speed of the terminal 20 is less than or equal to this speed, or that the terminal 20 can achieve the required performance at a speed less than or equal to this speed.

As another example, under HST conditions, terminal 20 may change the required measurement accuracy to be achieved in a measurement of a predetermined duration, or may limit the condition under which the specified measurement accuracy is applicable. By changing the accuracy of the measurement, the acceptable range of measurement error for each or any one of the RSRP, RSRQ, and SINR can be made larger than outside the HST conditions. In other words, the absolute value of the allowable measurement error may be set to a higher value. In the constraint of the condition under which the specified measurement accuracy is applicable, for example, the lower limit of the SNR under which the specified measurement accuracy is applied can be set to a value (eg, 0 dB) that is greater than a value (eg, -6 dB) outside the conditions HST.

As another example, under HST conditions, terminal 20 may set the number of simultaneously measured carriers, cells, or beams to a value that is less than the value outside of HST conditions. The specified lower value may depend or may be independent of the frequency range used; or may depend or may be independent of whether the measurement is intra-frequency or inter-frequency.

As another example, under HST conditions, terminal 20 may perform a measurement using an additional reference signal. Examples of such an additional reference signal are CSI-RS; DMRS for the Strategic Missile Forces; SSB not listed in SMTC; and a new reference signal that is used in HST conditions and is suitable for mobile communication conditions when driving at high speed.

In addition, the terminal 20 is configured to change operations related to the RLM depending on whether the terminal 20 is in the HST condition. For example, terminal 20 may change the number of samples used for measurement in the RLM, or the measurement period to determine the synchronized (IS) and out-of-sync (OOS) states in the RLM. For example, under HST conditions, terminal 20 may perform a measurement with fewer samples or a short measurement period. In addition, under HST conditions, the terminal 20 may set the minimum number of samples or the measurement period to a value smaller than the value outside the HST conditions, or may not set the minimum value.

As another example, under HST conditions, terminal 20 may limit the SSB transmission period or CSI-RS transmission period used for RLM measurement, or may change its operation depending on the SSB transmission period or CSI-RS transmission period used for measurement. in RLM. For example, terminal 20 may be configured to specify only an SSB transmission period or a CSI-RS transmission period that is shorter than a threshold. In addition, for example, the terminal 20 may perform measurement using a threshold value for limiting the SSB transmission period or the CSI-RS transmission period and the number of measurements that varies depending on the predetermined SSB transmission period or the predetermined CSI-RS transmission period. Said threshold for limiting the period may consist of a single threshold or a plurality of different thresholds.

As another example, under HST conditions, terminal 20 may change the parameters of the hypothetical PDCCH. For example, for the HST environment, a combination of new conditional PDCCH parameters, or some of the currently used conditional PDCCH parameters (for example, aggregation level, resource element power level (power gain), bandwidth and subcarrier spacing, SCS)) can be modified with respect to the corresponding parameters used outside of the HST conditions. The conditional PDCCH parameters for IS, the conditional PDCCH parameters for OOS, or both, may change.

As another example, under HST conditions, terminal 20 may change the threshold value (a pair of Block Error Rate (BLER) values used to determine IS or OOS in RLM. For example, under HST conditions, terminal 20 may set a pair BLER values greater than or less than outside the HST conditions.For example, terminal 20 may set the BLER pair to lower values when the cell radius is small, or may set the BLER pair to higher values when the cell radius is large.For example, when changing the BLER pair with BLER for IS 2% and BLER for OOS 10% to higher values, terminal 20 can set BLER for IS to 5% and BLER for OOS to 20%. % to lower values, terminal 20 may set BLER for IS to 1% and BLER for OOS to 5%. Alternatively, in a BLER pair, terminal 20 may change only the value for IS or only the value for OOS. To send the BLER pair to HST conditions can It does not use a known alarm, a newly created alarm, or a specific value described in the specification.

As another example, under HST conditions, terminal 20 may change the number of beams to be measured simultaneously. For example, under HST conditions, terminal 20 may set the number of beams to be measured simultaneously to a value that is smaller than the values outside of HST conditions.

In addition, the terminal 20 may change the operation related to the beam steering, depending on whether the terminal 20 is in the HST condition. For example, under HST conditions, terminal 20 may change the number of samples used for Beam Failure Detection (BFD) or Candidate Beam Detection (CBD). Under HST conditions, terminal 20 may perform a measurement for BFD or CBD with a number of samples that is less than that used outside of HST conditions. Terminal 20 may set the minimum measurement period for BFD or CBD to a value that is smaller than that used outside of HST conditions, or may not set the minimum measurement period.

As another example, under HST conditions, terminal 20 may limit the SSB transmission period, CSI-RS transmission period, or L1-RSRP reporting period used in the measurement for BFD, CBD, or L1-RSRP transmission; or may change its operation depending on the SSB transmission period, the CSI-RS transmission period, or the L1-RSRP message period. For example, terminal 20 may be configured to specify only an SSB transmission period, a CSI-RS transmission period, or an L1-RSRP message period that is shorter than a predetermined threshold. In addition, for example, the threshold for limiting the period of the reference signal specified for BFD, CBD, or L1-RSRP may be composed of a single threshold or a plurality of different thresholds. The measurement can be performed using a variable number of samples depending on the period limit threshold and on the reference signal period set for BFD, CBD, or L1-RSRP. Said threshold for limiting the period may consist of a single threshold or a plurality of different thresholds.

As another example, under HST conditions, terminal 20 may change parameters for the conditional PDCCH in the BFD. For example, in HST conditions, it is possible to specify a combination of new parameters for the conditional PDCCH in BFD; or it is possible to change some of the existing parameters (eg, aggregation level, resource element power level (power boost), bandwidth and subcarrier spacing (SCS)) for the conditional PDCCH in BFD compared to those used outside the HST conditions.

As another example, under HST conditions, terminal 20 may change the threshold value (BLER value) used to determine beam failure (BF). For example, under HST conditions, terminal 20 may increase or decrease the BLER value from the value used outside of HST conditions. For example, terminal 20 may decrease the BLER value when the cell radius is small, or increase the BLER value when the cell radius is large. For example, by changing the value of BLER to a higher value from the state in which beam failure (BF) was determined based on BLER 10%, terminal 20 may determine BF based on BLER 20%. For example, by changing the value of BLER to a lower value from the state in which BF was determined based on BLER 10%, terminal 20 may determine BF based on BLER 5%. The BLER value used to determine the BF may be the same as the threshold used to determine the OOS in the RLM, or may be different. Known signaling, newly created signaling, or a specific value described in the specification can be used to convey a BLER value under HST conditions.

As another example, under HST conditions, when the PDCCH or PDSCH TCI state changes, the delay time until terminal 20 receives the PDCCH or PDSCH over the beam corresponding to the changed TCI state may change. For example, under HST conditions, terminal 20 may set the delay time required to receive a PDCCH or PDSCH via a beam corresponding to a changed TCI state to a value greater than that used outside of HST conditions. For example, the specified delay time may increase by X ms or by Y samples (eg, by Y SSB transmissions). Increasing the delay time allocated to terminal 20 to receive the PDCCH or PDSCH using the beam corresponding to the changed TCI state makes it easier for terminal 20 to synchronize to said beam under HST conditions.

On the other hand, from the network point of view, the delay time allocated to the terminal 20 to receive the PDCCH or PDSCH via the beam corresponding to the changed TCI state can be reduced. Reducing the delay time allocated to terminal 20 to receive a PDCCH or PDSCH over a beam corresponding to a changed TCI state allows terminal 20 to be requested to perform synchronization with said beam under HST conditions.

In addition, the terminal 20 may change the measurement operation in the DRX mode depending on whether the terminal 20 is in the HST condition. For example, under HST conditions, terminal 20 may limit a DRX period that is configurable, or change its operation in accordance with this DRX period. For example, terminal 20 may be configured to set only a DRX period that is shorter than a predetermined threshold. Also, for example, the threshold for limiting the DRX period may be composed of a single threshold or a plurality of different thresholds. Terminal 20 may perform the measurement using a variable number of samples depending on the predetermined DRX period.

The following describes a method for configuring UE operations in the HST for different RATs in a dual connection (DC).

Fig. 9 shows an example (1) of period limitation according to one embodiment of the present invention. For the DC RAT technologies shown in FIG. 2, periods or parameters may be restricted using common configurations, or periods or parameters may be subject to general restrictions.

Base station 10 or terminal 20 may set each of the following configurations a) to d) with the same values for both RATs:

a) one of the periods or a combination of the SSB, CSI-RS, SMTC and MG periods used for cell discovery/measurement;

b) one of the periods or a combination of the SSB or CSI-RS period used for the RLM, the conditional PDCCH parameters and the BLER pair;

c) one of the periods or a combination of the SSB or CSI-RS period used for BFD, CBD or L1-RSRP message, conditional PDCCH parameters, BLER value and L1-RSRP message period;

d) DRX setting period.

Terminal 20 may use the same limiting threshold for both RATs in each of configurations a) to d) above (eg, for each period or each parameter).

For example, as shown in FIG. 9, terminal 20, when communicating with MNs 10A and SNs 10B according to NR-DC, may set a period T_period1 and a period T_period2 that are less than or equal to a common threshold value. T_period1 applies to NR communication between terminal 20 and MN 10A, and T_period2 applies to NR communication between terminal 20 and SN 10B. Each of the periods T_period1 and T_period2 is, for example, an SSB, CSI-RS, SMTC, MG, or DRX period.

Fig. 10 represents an example (2) of period limitation according to one embodiment of the present invention. For example, as shown in FIG. 10, terminal 20, when communicating with MN 10A and SN 10B according to EN-DC, may set the period DRX_period1 and the period DRX_period2 to be less than or equal to the common threshold value. DRX_period1 applies to LTE communication between terminal 20 and MN 10A, and DRX_period2 applies to NR communication between terminal 20 and SN 10B. Each of the periods DRX_period1 and DRX_period2 is, for example, an SSB, CSI-RS, SMTC, MG, or DRX period.

Fig. 11 represents an example (3) of period limitation according to one embodiment of the present invention. A setting or rule appropriate for a particular RAT may be applied to both RATs in the dual connection (DC) shown in FIG. 2. Said particular RAT may be the RAT of the master node or the RAT of the secondary node, may be a RAT specific to LTE or NR, or may be a RAT in which the supported rate of movement of the terminal 20 is less.

Applying a configuration or rule in a DC to a particular RAT could mean, for example, not applying a particular setting or rule to both RATs; applying a configuration or rule only to a specific RAT; or applying a configuration or rule only to a RAT other than a specific RAT and not applying any setting or rule to a specific RAT. The specified setting or rule may be, for example, a restriction imposed on a period or parameter described with reference to FIG. 9.

In FIG. 11 shows by way of example that when the running speed of the terminal 20 supported in RAT1 is greater than the speed supported in RAT2, and the terminal 20 performs DC communication according to RAT1 and RAT2, a limitation may be applied to a period or a parameter related to RAT2. In FIG. 11, the specific RAT is RAT1, which supports the higher speed of the terminal 20.

Fig. 12 shows an example (4) of a period limitation according to one embodiment of the present invention. For example, in FIG. 12 shows that when the running speed of the terminal 20 supported in RAT2 is greater than the speed supported in RAT1, and the terminal 20 performs DC communication according to RAT1 and RAT2, the limitation may not be applied to the period or parameter of each of RAT1 and RAT2. In FIG. 12, said specific RAT is RAT1 in which the supported running speed of the terminal 20 is lower.

Operations for HST in the above embodiments may also be defined as operations for Ultra-Reliable Low Latency Communication (URLC) or power save mode. In other words, the HST conditions in the above embodiments may also be considered as a requirement for the URLLC or a requirement for the power saving mode. The operations for HST from the above embodiments may be applied to any network architecture, such as standalone (SA) and MR-DC, or different operations for HST may be used in different network architectures. The operations for the HST of the above embodiments may be determined whether or not carrier aggregation is used, or different operations for the HST may be used in different ENs (eg, primary cell and secondary cell).

The above embodiments enable the terminal 20 to perform a measurement suitable for HST conditions and improve efficiency. In addition, the terminal 20 has the ability to change UE operations or network configurations to meet HST conditions. Further, the terminal 20 has the ability to change the operations of the UEs for the RATs participating in the dual connection so as to comply with the conditions of the HST.

Thus, it is possible for a terminal in a radio communication system to perform measurements subject to conditions.

(Device configurations)

The following describes examples of functional configurations of the base station 10 and the terminal 20, configured to implement the above-described processes and operations. The base station 10 and the terminal 20 contain functional elements for implementing the above-described embodiments. However, both base station 10 and terminal 20 may contain only some of the functional elements of these embodiments.

<Base Station 10>

Fig. 13 is an example of a functional diagram of the base station 10. In FIG. 13, the base station 10 includes a transmission module 110, a reception module 120, a configuration module 130, and a control module 140. The functional configuration shown in Fig. 13 is just an example. The division into functional components and the names of the functional components can be freely changed as long as the operation according to the embodiments of the present invention is possible.

The transmission module 110 includes a functional element for generating a signal to be transmitted to the terminal 20 and wirelessly transmitting the signal. The receiving module 120 includes a functional element for receiving various types of signals transmitted from the terminal 20 and for deriving, for example, information on higher layers from the received signals. The transmission module 110 includes a functional element for transmitting, for example, NR-PSS, NR-SSS, NR-PBCH and downlink/uplink control signals to terminal 20.

The configuration unit 130 is configured to store preset setting information and various types of setting information to be transmitted to the terminal 20 in a storage device, and to read this setting information from the storage device as needed. This setting information contains, for example, information related to the measurement performed by the terminal 20 under HST conditions.

The control module 140 is configured to generate configurations for the measurement performed by the terminal 20 as described in the embodiments. In addition, the control unit 140 is configured to control communication based on the measurement report received from the terminal 20. The functional component of the control unit 140 related to signal transmission may be contained in the transmission unit 110, and the functional component of the control unit 140 related to receiving signal may be contained in the receiving module 120.

<Terminal 20>

Fig. 14 is an example of a functional diagram of the terminal 20. Shown in FIG. 14, the terminal 20 includes a transmission module 210, a reception module 220, a configuration module 230, and a control module 240. The functional configuration shown in Fig. 14 is just an example. The division into functional components and the names of the functional components can be freely changed as long as it is possible to operate according to one embodiment of the present invention.

The transmission module 210 is configured to generate a signal to be transmitted from the data to be transmitted, and to wirelessly transmit the signal. The receiving module 220 is configured to wirelessly receive various types of signals and to obtain higher layer signals from the received physical layer signals. In addition, the receiving unit 220 includes a functional element for receiving, for example, NR-PSS, NR-SSS, NR-PBCH, and downlink/uplink/direct control signals transmitted from the base station 10. In addition, for device-to-device communication, for example (Device-to-Device, D2D) the transmission module 210 is configured to transmit to the other terminal 20 a physical direct control channel (Physical Sidelink Control Channel, PSCCH), a physical direct common channel (Physical Sidelink Shared Channel, PSSCH ), Physical Direct Detection Channel (Physical Sidelink Broadcast Channel, PSDCH) and Physical Direct Broadcast Channel (Physical Sidelink Broadcast Channel, PSBCH); and the receiving module 120 is configured to receive channels such as PSCCH, PSSCH, PSDCH, and PSBCH from another terminal 20.

The configuration unit 230 is configured to store various types of setting information received from the base station 10 or the terminal 20 by the receiving unit 220 in a memory, and to read this setting information from the memory as needed. The configuration module 230 is also configured to store predetermined setting information. This setting information contains, for example, information related to the measurement performed by the terminal 20 under HST conditions.

The control unit 240 is configured to perform measurements based on the measurement configurations obtained from the base station 10 as described in the embodiments. In addition, the control unit 240 is configured to report the measurement results to the base station 10. The functional component of the control unit 240 related to signal transmission may be contained in the transmission unit 210, and the functional component of the control unit 240 related to signal reception may be contained in receiving module 220.

(Hardware configuration)

The functional diagrams (FIGS. 13 and FIG. 14) used to describe the above embodiments show functional blocks or modules. These functional blocks (components) may be implemented by any combination of hardware and/or software components. Each functional block can be implemented in any way. In other words, each functional block may be implemented by a single device connected physically or logically, or two or more devices physically or logically separate and connected directly or indirectly (eg, by wires and/or wirelessly). Each functional block can also be implemented by combining said one device or two or more devices with software.

Examples of functions include, but are not limited to, determining, deciding, judging, calculating, calculating, processing, inferring, investigating, searching, confirming, receiving, transmitting, inferring, accessing, deciding, selecting, acknowledging, fact-finding, comparing. , assumption, assumption, assumption, broadcast, message, communication, forwarding, configuration, reconfiguration, selection, display, and assignment. For example, a functional block (or functional component) for transmission may be referred to as a transmission module or a transmission module. As stated above, the functional block may be implemented in any suitable manner.

For example, both base station 10 and terminal 20 according to embodiments of the present invention can function as a computer executing the radio communication method according to the present invention. Fig. 15 shows an example of a hardware configuration of a base station 10 and a terminal 20 according to one embodiment of the present invention. Both base station 10 and terminal 20 may be physically implemented as a computer, including a processor 1001, a memory 1002, an auxiliary storage device 1003, a communication device 1004, an input device 1005, an output device 1006, and a bus 1007.

In the following description, the term "device" may mean, for example, a circuit, a block, or a module. In the hardware configuration of both the base station 10 and the terminal 20, each of the devices shown in the drawing may contain one or more, or some of these devices may not be included.

Each functional unit of the base station 10 and the user equipment 20 is implemented by performing the following operation: predetermined software (program) is loaded into the hardware, for example, into the processor 1001 and into the storage device 1002, and the processor 1001 performs operations to control the communication performed by the device 1004 communication, and at least one of reading and writing data to the storage device 1002 and the auxiliary storage device 1003.

The processor 1001 is configured to control the entire computer by executing, for example, an operating system. The processor 1001 may be implemented by a central processing unit (CPU) including a peripheral device interface, a control unit, an arithmetic unit, and a register. For example, the control module 140 and the control module 240 may be implemented by the processor 1001.

The processor 1001 is configured to download programs (program code), program modules, and data from the auxiliary storage device 1003 and/or from the communication device 1004 to the storage device 1002, and to perform various operations in accordance with the downloaded programs, program modules, and data. These programs are configured to cause the computer to perform at least some of the operations described in the above embodiments. For example, the control module 140 of the base station 10 shown in FIG. 13 may be implemented by a control program stored in the memory 1002 and executed by the processor 1001. In addition, for example, the control unit 240 of the terminal 20 shown in FIG. 14 may be implemented by a control program stored in memory 1002 and executed by processor 1001. The above-described operations may be executed by a single processor 1001 or simultaneously or sequentially by two or more processors 1001. Processor 1001 may be implemented by one or more integrated circuit chips. These programs can be received from the network via a communication line.

The storage device 1002 is a machine-readable storage medium and can be implemented, for example, by at least one of Read Only Memory (ROM), Erasable Programmable ROM (EPROM) , electrically erasable read-only memory (English Electrically Erasable Programmable ROM, EEPROM) and random access memory (English Random Access Memory, RAM). Memory 1002 may also be referred to as a register, cache, or main memory. The storage device 1002 is configured to store, for example, programs (program code) and program modules that can be executed to implement communication methods in accordance with embodiments of the present invention.

The auxiliary storage device 1003 is a computer-readable storage medium and can be implemented, for example, by at least one of an optical disk, for example, a compact disk (English Compact Disc ROM, CD-ROM), a hard disk, a floppy disk , magneto-optical disc (such as CD, digital multifunction disc, or Blu-ray Disc (registered trademark)), smart card, flash memory (such as memory card or removable storage), floppy disk (registered trademark floppy disk) and magnetic tape. The above-described storage medium may also be implemented by any other suitable medium, such as a database or a server, containing at least one of the storage device 1002 and the auxiliary storage device 1003.

Communications device 1004 is a hardware component (transceiver) for communicating with other computers through at least one of a wired network and a wireless network. Communication device 1004 may also be referred to as a network device, network controller, network card, or communication module. Communication device 1004 may include a high frequency switch, an antenna switch, a filter, and a frequency synthesizer to implement at least one of Frequency Division Duplex (FDD) and Time Division Duplex (Time). Division Duplex, TDD). For example, a transmitting and receiving antenna, an amplifier, a transceiver, and a transmission line interface may be implemented by the communication device 1004. The transceiver may be physically or logically divided into a transmit module and a receive module.

The input device 1005 is configured to receive information from outside and may be implemented through, for example, a keyboard, mouse, microphone, switches, buttons, and/or sensors. Output device 1006 is a means (eg, display, acoustic emitter, and/or LED) for outputting information. Input device 1005 and output device 1006 may be implemented as a single component (eg, as a touch pad).

The above-described devices, including the processor 1001 and the memory 1002, are connected to each other by a bus 1007 for exchanging information. The bus 1007 can be implemented as a single bus or multiple buses connecting the respective devices.

Base station 10 and terminal 20 may include hardware such as a microprocessor, digital signal processor (Digital Signal Processor, DSP), application-specific integrated circuit (English Application-Specific Integrated Circuit, ASIC), programmable logic device (English Programmable Logic Device, PLD) and Programmable Gate Array (FPGA), and all or part of these functional blocks can be implemented by these hardware components. For example, processor 1001 may be implemented with at least one of these hardware components.

(Conclusion by embodiments)

As described above, embodiments of the present invention provide a terminal comprising a receiving module configured to receive from a base station a configuration related to at least one of a measurement and a message, a control module configured to perform a measurement based on said a configuration relating to at least one of the measurement and the message, and a transmission module configured to transmit to the base station a measurement report based on the measurement result. The control module is configured to limit the period related to the specified measurement, or to change the number of acts of performing the operation related to the specified measurement, depending on whether the terminal is in specific conditions.

The above configuration enables the terminal 20 to perform measurement suitable for HST conditions and improve efficiency. In addition, the terminal 20 has the ability to change UE operations or network configurations to meet HST conditions. Thus, in the radio communication system, the terminal has the ability to perform the measurement according to the conditions.

The control module may determine whether the terminal is in a particular condition based on the supported moving speed or the required moving speed of said terminal. When limiting the period related to the measurement, the control module may limit one of the following periods: a synchronization signal transmission period, a reference signal transmission period, a secondary cell measurement period, and a measurement period for sync/out of sync determination. When the number of occurrences of an operation related to measurement is changed, the control module may change the number of occurrences of an operation related to measurement based on the period related to measurement. With such a configuration, terminal 20 can adapt measurement configurations to HST conditions.

After determining that the terminal is in a particular condition, the control module may limit the period related to the measurement to a value that is less than a threshold value. With such a configuration, terminal 20 can adapt measurement configurations to HST conditions.

When the measurement related period is a transmission period or a measurement period for sync/out of sync determination, and the terminal is in a certain environment, the control module may change the block error rate threshold used for sync/out of sync determination. With such a configuration, terminal 20 can adapt measurement configurations to HST conditions.

After determining that the terminal is in a particular environment, the control module can change the number of beams to be measured simultaneously. With such a configuration, terminal 20 can adapt measurement configurations to HST conditions.

The period related to the measurement may be limited by a threshold that is common to the first RAT and the second RAT in the dual connection. With this configuration, the terminal 20 may change the UE operations for the RATs used in the DC to comply with the HST conditions.

<Additional description of embodiments of the invention>

The embodiments of the present invention have been described above. However, the present invention is not limited to the above-described embodiments, and those skilled in the art will appreciate the possibility of various variations, modifications, changes, substitutions, and the like that can be made in the above-described embodiments. Although specific numerical values have been used in the foregoing description to facilitate understanding of the present invention, these values are merely exemplary and other suitable values may be used instead unless otherwise indicated. The division of the subject matter into sections in the above description is not essential to the present invention. For example, if necessary, the subject matter described in two or more sections can be combined and used, and the subject matter described in one section can be applied to the subject matter described in another section, if there is no conflict. The boundaries of functional modules or processing modules in functional diagrams do not necessarily correspond to the boundaries of physical components. The operations of a plurality of functional modules may be physically performed by a single physical component, and the operation of a single functional module may be physically performed by a plurality of physical components. The order of the steps in the operations described in the embodiments may be changed if the steps are compatible. While base station 10 and terminal 20 are described using functional device diagrams for ease of explanation, base station 10 and terminal 20 may be implemented in hardware, software, or a combination of both. Each of the software executable by the processor included in the base station 10 according to the embodiments of the present invention and the software executable by the processor included in the terminal 20 according to the embodiments of the present invention may be stored on any suitable writable storage medium, for example, in RAM, flash memory, ROM, EPROM, EEPROM, register, hard disk, removable disk, CD-ROM, database, or server.

Information may also be transmitted using methods other than those described in the present disclosure. For example, information can be transmitted through physical layer signaling (for example, downlink control information (eng. Downlink Control Information, DCI) or uplink control information (eng. Uplink Control Information, UCI)), higher layer signaling (for example, radio resource control layer signaling ( Radio Resource Control, RRC), medium access level signaling (Medium Access Control, MAC), broadcast information (master information block, Ml B) or system information block (System Information Block , SIB)), other signals, or combinations thereof.RRC layer signaling may be referred to as an RRC message, and this signaling may be, for example, an RRC Connection Setup message or an RRC Connection Reconfiguration message.

The embodiments described in this disclosure may be applied to at least one of the systems using LTE, LTE-Advanced (LTE-Advanced, LTE-A), SUPER 3G, IMT-Advanced, fourth generation (4G ), 5G mobile communications system, Future Radio Access (FRA), New Radio (NR), W-CDMA (registered trademark), GSM (registered trademark) , CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (Wi-MAX (registered trademark)), IEEE 802.20, small distances using Ultra-Wide Band (UWB) signals, Bluetooth (registered trademark) and any other suitable system, as well as the next generation system implemented by any of these systems. In addition, the above embodiments may apply to a combination of multiple systems (eg, a combination of at least one of LTE, LTE-A, and 5G).

The order of the steps in the sequence diagrams and flowcharts described in the embodiments of the present invention may be changed, as long as the compatibility of these steps is maintained. In particular, the order of steps in each method described in this disclosure is merely an example and may be changed to any suitable order.

The specific operations performed by the base station 10 in the present invention may be performed by the superior node of the base station 10. at least one of base station 10 and a network node other than base station 10 (which is, for example, but not limited to, MME or S-GW). In the above example, there is one host other than base station 10. However, there may be two or more types of hosts (for example, MME and S-GW) other than base station 10.

The information or signals described in the present disclosure may be transmitted from an upper layer (or lower layer) to a lower layer (or higher layer) and may be received or transmitted through a plurality of network nodes.

Input/output information can be stored in a specific location (eg, memory) or stored in an ordered manner using a control table. Input/output information can be overwritten, updated or supplemented. The output information can be removed. The input information can be transferred to another device.

In the present invention, the decision may be made based on a single bit value (0 or 1) or a true value (boolean value true or false), or by comparison of values (eg, comparison with a predetermined value).

Software, whether called a program, internal program, middleware, microcode, hardware description language, or otherwise, should be understood broadly as referring to any of an instruction, instruction set, code, code segment, program code, program, subroutine, program unit, application, application program, package, object, executable, thread of execution, procedure, and function.

Programs, commands and information can be transmitted and received via the transmission medium. For example, when a program is transmitted from a website, server, or any other remote source using wired media (such as coaxial cable, fiber optic cable, twisted-pair cable, or Digital Subscriber Line (DSL)) and/or wireless media (eg, infrared rays or microwaves), then at least one of these wired media and wireless media is included in the definition of the transmission medium.

The information and signals described in this disclosure may be represented using one of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, and code sequences (chips) in the above descriptions can be represented by voltages, electric currents, electromagnetic waves, magnetic fields, magnetic particles, optical fields, photons, or any combination of the above.

Terms described in this disclosure and terms necessary for understanding this disclosure may be replaced by terms having the same or similar meaning. For example, the channel and/or symbol may be replaced by a signal (signaling). In addition, the signal can be replaced by a message. The elementary carrier (EC) may be referred to as a frequency carrier, a cell, or a frequency carrier.

In the present disclosure, the terms "system" and "network" may be used interchangeably.

The information and parameters described in this disclosure may be represented by absolute values, relative values with respect to predetermined values, or other types of information. For example, radio resources may be indicated by indexes.

The names used for the parameters described above are not the only possible ones. In addition, the formulas that use these parameters are not limited to the formulas expressly disclosed in the present disclosure. The various channels (eg, PUCCH and PDCCH) and information elements may be referred to by any suitable names. Accordingly, the various names assigned to channels and information items do not limit said channels and information items in any respect.

In this disclosure, terms such as "base station (BS)", "radio base station", "base station device", "fixed station", "NodeB", "eNodeB (eNB)", "gNodeB (gNB)”, “access point”, “transmitting point”, “receiving point”, “transmitting/receiving point”, “cell”, “sector”, “cell group”, “carrier”, and “elementary carrier” can be used interchangeably. A base station may also be referred to as a macro cell, small cell, femto cell, or pico cell.

The base station may serve one or more cells (eg, three cells). When a base station serves many cells, the entire coverage area of that base station can be divided into many smaller areas, in each of which communication services can be provided using a subsystem of the base station (for example, a small indoor base station (remote radio unit, English Remote Radio head)). The term "cell" or "sector" refers to part or all of the coverage area of at least one of a base station and a base station subsystem providing communication services in that coverage area.

In the present disclosure, the terms “mobile station (MS), “user terminal”, “user equipment (UE)”, and “terminal” may be used interchangeably.

The person skilled in the art may refer to the mobile station by any other suitable name, such as 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, or client.

At least one of a base station and a mobile station may be referred to as a transmitter, a receiver, or a communication device. At least one of the base station and the mobile station may be a device mounted on the mobile unit or the mobile unit itself. Said movable object may be a vehicle (eg, a car or an aircraft), a movable object without a pilot on board (eg, a drone or a self-driving vehicle), or a robot (human-operated type or unmanned type). At least one of the base station and the mobile station may be a device that does not move during communication operations. For example, at least one of the base station and mobile station may be an Internet of Things (IoT) device, such as a sensor.

The base station in the present disclosure may be replaced by a user terminal. For example, the embodiments of the present disclosure may, instead of a configuration in which communication is between a base station and a user terminal, be applied to a configuration in which communication is between a plurality of terminals 20 (e.g., Device-to-Device, D2D) or communication between a vehicle and a wide range of objects (English Vehicle-to-Everything, V2X)). In this case, the terminal 20 may include functional modules of the base station 10. Terms such as "uplink" and "downlink" may be replaced by a term such as "communication side" used in terminal-terminal communications. For example, the uplink and downlink can be changed to a channel related to the communication side.

Similarly, in the present disclosure, a user terminal may be replaced by a base station. In this case, the base station may contain functional modules of the user terminal.

In the present disclosure, the term "definition" may refer to various operations. For example, "determining" may mean performing any of judgment, calculation, calculation, processing, inference, investigation, retrieval (search, query) (eg, lookup in a data structure such as a table or database), and verification. In addition, "determining" can mean doing anything from receiving (eg, receiving information), transmitting (eg, transmitting information), input, output, and access (eg, accessing data in memory), and the like. . Further, "determining" may mean doing any of disambiguation, selection, selection, fact-finding, and comparison. Thus, "determining" may refer to performing an operation. In addition, "definition" can be replaced by, for example, a term such as "speculation", "expectation" or "consideration".

The terms "connected", "connected", or variants thereof, refer to any direct or indirect connection or connection between two or more elements, including the presence of one or more intermediate elements between two elements that are "connected" or "connected". The relationship or connection between these elements may be physical, logical, or a combination of both. For example, "connection" can be replaced by "access". In this disclosure, two elements may be considered to be "connected" or "coupled" together using one or more electrical conductors, cables, and/or printed electrical connections, or using, as non-limiting and non-exhaustive examples, electromagnetic energy with a wavelength in radio frequency range, in the microwave range or in the optical (both visible and invisible) range.

The Reference Signal may be abbreviated RS and, depending on the applicable standard, may be referred to as a pilot.

In this disclosure, the expression "based on" does not mean "only based on", unless otherwise indicated. In other words, “on the basis of” can mean both “only on the basis of” and “on the basis of at least”.

In the present disclosure, terms such as "first" and "second" used to refer to elements generally do not specify the number or order of those elements. In the present disclosure, these terms may be used to distinguish between two or more elements. Thus, referring to the first and second element does not necessarily mean that there are only two elements and that the first element must precede the second element.

The "modules" in each of the devices described above may also be referred to as "parts", "circuits", or "devices".

In the present disclosure, the terms "include", "comprising" and variations thereof are non-limiting, like the term "comprising". In addition, in the present disclosure, the conjunction "or" does not mean an exclusive disjunction.

A radio frame may consist of one or more frames in the time domain. In the time domain, one or more frames may be referred to as subframes. Further, a subframe in the time domain may be composed of one or more slots. The subframe may have a fixed time duration (eg, 1 ms) independent of numerology.

Numerology may refer to a communication parameter applied to at least one of the transmission and reception of a signal or channel. Numerology may indicate, for example, at least one of Subcarrier Spacing (SCS), bandwidth, symbol length, cyclic prefix length, Transmission Time Interval (TTI), number of symbols per TTI, a radio frame pattern, certain filtering processing performed by the transceiver in the frequency domain, and certain windowing processing performed by the transceiver in the time domain.

A slot in the time domain may consist of one or more symbols (e.g., Orthogonal Frequency Division Multiplexing (OFDM) scheme symbols or Single Carrier Frequency Division Multiple Access (FDM) symbols. .Single Carrier Frequency Division Multiple Access, SC-FDMA)). The slot can be a temporary element depending on numerology.

A slot may contain a plurality of mini-slots. Each mini-slot in the time domain may consist of one or more symbols. A mini-slot may also be referred to as a sub-slot. A mini-slot can consist of fewer symbols than a slot. PDSCH (or PUSCH) transmission in a tile larger than a mini-slot may be referred to as PDSCH (or PUSCH) mapping type A. PDSCH (or PUSCH) transmission using a mini-slot may be referred to as PDSCH (or PUSCH) mapping type B.

The radio frame, subframe, slot, mini-slot, and symbol are temporary elements in signal transmission. The radio frame, subframe, slot, mini-slot, and symbol may be referred to by other suitable names.

For example, one subframe, multiple consecutive subframes, one slot, or one mini-slot may be referred to as a transmission time interval (TTI). Thus, at least one of the subframe and TTI may correspond to a subframe (1 ms) in existing LTE, a period shorter than 1 ms (eg, 1 to 13 symbols), or a period longer than 1 ms. An element representing a TTI may be referred to as a slot or mini-slot instead of a subframe.

In this case, TTI may denote, for example, the smallest temporal scheduling unit in radio communication. For example, in an LTE system, a base station performs scheduling for each terminal 20 by allocating radio resources (eg, bandwidth and transmit power allowed for use by each terminal 20) in units of TTI. The definition of TTI is not limited to this example.

For example, TTI may be used as a temporal transmission element for a channel-encoded data packet (transport block), code block, or code word; or as a processing element for link planning or adaptation. When a TTI is allocated, the time period (eg, number of symbols) that is actually mapped to, eg, a transport block, code block, or codeword, may be shorter than that TTI.

When a TTI is referred to as one slot or one mini-slot, the minimum time element in scheduling may be one or more TTIs (ie, one or more slots or one or more mini-slots). Furthermore, the number of slots (or number of mini-slots) constituting this minimum scheduling time element can be controllable.

A TTI with a time duration of 1 ms may be called, for example, a normal TTI (TTI in LTE Release 8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, or a slot. A TTI that is shorter than a regular TTI may be called, for example, a short TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a minislot, a subslot, or a slot.

A long TTI (eg, a normal TTI or a subframe) may be referred to as a TTI with a time duration greater than 1 ms, and a short TTI (eg, an abbreviated TTI) may be referred to as a TTI with a duration shorter than the long TTI and greater than or equal to 1 ms.

A resource block (RB) is a resource allocation element in the time domain and in the frequency domain, and in the frequency domain, it may contain one subcarrier or a plurality of subcarriers consecutively without gaps. A resource block may contain the same number of subcarriers, eg 12, regardless of numerology. Alternatively, the number of subcarriers contained in a resource block may be determined based on numerology.

In addition, in the time domain, a resource block may contain one or more symbols and may be one slot, one mini-slot, one subframe, or one TTI in length. Both one TTI and one subframe may consist of one or more resource blocks.

One or more resource blocks (RBs) can be called a Physical Resource Block (Physical RB, PR B), a Subcarrier Group (SCG), a Resource Element Group (REG), a PRB pair, or a pair of RB.

Further, the resource block may consist of one or more resource elements (English Resource Element, RE). One resource element may be, for example, a radio resource region consisting of one subcarrier and one symbol.

A Bandwidth Part (BWP; also referred to as a partial band) can mean a subset of consecutive unbroken common resource blocks for some numerology on some carrier. In this case, the common RB may be indicated by the index RB with respect to the common reference point of this carrier. The PRB may be defined by a partial band (BWP) and may be numbered in that BWP.

A BWP may contain an upstream BWP (UL BWP) and a downstream BWP (DL BWP). One or more BWPs may be defined for a UE on a single carrier.

At least one of these BWPs may be active, and the UE may assume that the given signal/channel is not transmitted or received outside of this active BWP. "Cell" and "carrier" in the present disclosure may be referred to as "BWP".

The above-described radio frame, subframe, slot, mini-slot, and symbol configurations are just examples. For example, various changes are possible regarding the number of subframes in a radio frame, the number of slots per subframe or radio frame, the number of mini-slots in a slot, the number of symbols and RBs in a slot or mini-slot, the number of subcarriers in a RB, the number of symbols in a TTI, the symbol length, and cyclic prefix length (CPU).

When a noun in the translation of this disclosure is used in the singular, said noun may imply the presence of multiple elements.

In the present disclosure, "A and B are different" may mean "A and B are different from each other" or "A and B are different from C". The same applies to terms such as "separated" and "joined".

The embodiments described in this disclosure may be used individually or in combination, and may also change during the operation. Predetermined information (eg, "A is X") may be communicated explicitly or implicitly (eg, by not communicating this predetermined information).

In the present disclosure, a measurement configuration is an example of a measurement setting. A measurement report is an example of a report that reports measurement results. The measuring span (MG) is an example of a span in which a measurement is performed. BLER is an example of a block error rate.

The embodiments of the present invention have been described in detail above. Despite this, the specialist should be obvious that the present invention is not limited to the above-described embodiments. In these embodiments, changes and modifications may be made without departing from the scope of the present invention as defined by the claims. Accordingly, the above-described embodiments are merely examples and are not intended to limit the present invention.

Reference designations

10 base station

110 transmission module

120 receiving module

130 configuration module

140 control module

20 terminal

210 transmission module

220 receiving module

230 configuration module

240 control module

1001 processors

1002 storage device

1003 auxiliary storage device

1004 communication device

1005 input device

1006 output device

Claims (16)

1. Terminal containing: a transmission module, configured to transmit to the base station information indicating the capability of the terminal, said capability being related to mobile communication at high speed; a receiving unit, configured to receive, from the base station, setting information related to mobile communication while driving at high speed; and a control unit configured, at the terminal, to set a cell detection period and a mobile communication measurement period when moving at high speed based on said setting information. 2. The terminal according to claim 1, wherein the control module is configured to configure, in the terminal, a cell detection period and a measurement period in accordance with at least one of a discontinuous reception period (DRX) and a measurement time configuration period based on the SS/ block. PBCH (SMTC). 3. Base station, containing: a receiving module, configured to receive, from the terminal, information indicative of the terminal's capability, said capability being related to high-speed mobile communication; a transmission module, configured to transmit, to the terminal, setting information related to mobile communication when traveling at high speed, wherein the receiving module is configured to receive, from the terminal, a measurement result report for the measurement performed by the terminal using the cell detection period and the measurement period in mobile communications while moving at high speed based on said setting information. 4. A communication system comprising a base station and a terminal capable of transmitting to the base station information indicating the technical capability of the terminal, said capability being related to mobile communication when moving at high speed; wherein the base station is configured to transmit, to the terminal, setting information related to mobile communication when moving at high speed; and the terminal is configured to set, at the terminal, a cell detection period and a mobile communication measurement period when moving at a high speed based on said setting information. 5. A communication method performed by a terminal, including: transmitting, to the base station, information indicating the capability of the terminal, said capability being related to high-speed mobile communication; receiving, from the base station, setting information related to mobile communications while driving at high speed; and setting, at the terminal, a cell detection period and a mobile communication measurement period when moving at high speed based on said setting information.

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